merge metacity(gtk3) changes

merge metacity(gtk3) changes
fix warnings
clean up unused variables
replace UNUSED_VARIABLE by G_GNUC_UNUSED

16 files changed, 985 insertions, 316 deletions

diff --git a/src/ui/draw-workspace.c b/src/ui/draw-workspace.c
index 1831b46c..a40579db 100644
--- a/src/ui/draw-workspace.c
+++ b/src/ui/draw-workspace.c
@@ -27,6 +27,11 @@
 
 #include "draw-workspace.h"
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+#define MATE_DESKTOP_USE_UNSTABLE_API
+#include <libmate-desktop/mate-desktop-utils.h>
+#endif
+
 
 static void
 get_window_rect (const WnckWindowDisplayInfo *win,
@@ -83,13 +88,18 @@ draw_window (GtkWidget                   *widget,
   GdkPixbuf *icon;
   int icon_x, icon_y, icon_w, icon_h;
   gboolean is_active;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA color;
+  GtkStyleContext *style;
+#else
   GdkColor *color;
   GtkStyle *style;
+#endif
 
   is_active = win->is_active;
 
   #if GTK_CHECK_VERSION(3, 0, 0)
-  cairo_save(cr);
+  cairo_save (cr);
   #else
   cr = gdk_cairo_create (drawable);
   #endif
@@ -97,6 +107,14 @@ draw_window (GtkWidget                   *widget,
   cairo_rectangle (cr, winrect->x, winrect->y, winrect->width, winrect->height);
   cairo_clip (cr);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  style = gtk_widget_get_style_context (widget);
+  if (is_active)
+    mate_desktop_gtk_style_get_light_color (style, state, &color);
+  else
+    gtk_style_context_get_background_color (style, state, &color);
+  gdk_cairo_set_source_rgba (cr, &color);
+#else
   style = gtk_widget_get_style (widget);
   if (is_active)
     color = &style->light[state];
@@ -106,6 +124,7 @@ draw_window (GtkWidget                   *widget,
                         color->red / 65535.,
                         color->green / 65535.,
                         color->blue / 65535.);
+#endif
 
   cairo_rectangle (cr,
                    winrect->x + 1, winrect->y + 1,
@@ -156,15 +175,17 @@ draw_window (GtkWidget                   *widget,
       cairo_restore (cr);
     }
 
-  if (is_active)
-    color = &style->fg[state];
-  else
-    color = &style->fg[state];
+#if GTK_CHECK_VERSION (3, 0, 0)
+  gtk_style_context_get_color (style, state, &color);
+  gdk_cairo_set_source_rgba (cr, &color);
+#else
+  color = &style->fg[state];
 
   cairo_set_source_rgb (cr,
                         color->red / 65535.,
                         color->green / 65535.,
                         color->blue / 65535.);
+#endif
   cairo_set_line_width (cr, 1.0);
   cairo_rectangle (cr,
                    winrect->x + 0.5, winrect->y + 0.5,
@@ -198,10 +219,13 @@ wnck_draw_workspace (GtkWidget                   *widget,
 {
   int i;
   GdkRectangle workspace_rect;
+#if GTK_CHECK_VERSION(3, 0, 0)
+  GtkStateFlags state;
+  GtkStyleContext *style;
+#else
   GtkStateType state;
-  #if !GTK_CHECK_VERSION(3, 0, 0)
   cairo_t *cr;
-  #endif
+#endif
 
   workspace_rect.x = x;
   workspace_rect.y = y;
@@ -209,14 +233,27 @@ wnck_draw_workspace (GtkWidget                   *widget,
   workspace_rect.height = height;
 
   if (is_active)
+#if GTK_CHECK_VERSION (3, 0, 0)
+    state = GTK_STATE_FLAG_SELECTED;
+#else
     state = GTK_STATE_SELECTED;
+#endif
   else if (workspace_background)
+#if GTK_CHECK_VERSION (3, 0, 0)
+    state = GTK_STATE_FLAG_PRELIGHT;
+#else
     state = GTK_STATE_PRELIGHT;
+#endif
   else
+#if GTK_CHECK_VERSION (3, 0, 0)
+    state = GTK_STATE_FLAG_NORMAL;
+#else
     state = GTK_STATE_NORMAL;
+#endif
 
   #if GTK_CHECK_VERSION(3, 0, 0)
-  cairo_save(cr);
+  style = gtk_widget_get_style_context (widget);
+  cairo_save (cr);
   #else
   cr = gdk_cairo_create (drawable);
   #endif
@@ -228,7 +265,14 @@ wnck_draw_workspace (GtkWidget                   *widget,
     }
   else
     {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA color;
+
+      mate_desktop_gtk_style_get_dark_color (style,state, &color);
+      gdk_cairo_set_source_rgba (cr, &color);
+#else
       gdk_cairo_set_source_color (cr, &gtk_widget_get_style (widget)->dark[state]);
+#endif
       cairo_rectangle (cr, x, y, width, height);
       cairo_fill (cr);
     }
diff --git a/src/ui/fixedtip.c b/src/ui/fixedtip.c
index 6f07c6bb..fc1be2af 100644
--- a/src/ui/fixedtip.c
+++ b/src/ui/fixedtip.c
@@ -84,7 +84,7 @@ expose_handler (GtkTooltips *tooltips)
 #endif
 
 void
-meta_fixed_tip_show (Display *xdisplay, int screen_number,
+meta_fixed_tip_show (int screen_number,
                      int root_x, int root_y,
                      const char *markup_text)
 {
diff --git a/src/ui/fixedtip.h b/src/ui/fixedtip.h
index e3eac8f5..f20f0d2c 100644
--- a/src/ui/fixedtip.h
+++ b/src/ui/fixedtip.h
@@ -49,13 +49,12 @@
  * displayed, but if it is the window will be reused rather than destroyed
  * and recreated.
  *
- * \param  xdisplay       An X display.
  * \param  screen_number  The number of the screen.
  * \param  root_x         The X coordinate where the tooltip should appear
  * \param  root_y         The Y coordinate where the tooltip should appear
  * \param  markup_text    Text to display in the tooltip; can contain markup
  */
-void meta_fixed_tip_show (Display *xdisplay, int screen_number,
+void meta_fixed_tip_show (int screen_number,
                           int root_x, int root_y,
                           const char *markup_text);
 
diff --git a/src/ui/frames.c b/src/ui/frames.c
index 60e09ea3..099c5052 100644
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -1099,16 +1099,14 @@ meta_frames_move_resize_frame (MetaFrames *frames,
                                int         height)
 {
   MetaUIFrame *frame = meta_frames_lookup_window (frames, xwindow);
-  int old_x, old_y, old_width, old_height;
+  int old_width, old_height;
 
-	#if GTK_CHECK_VERSION(3, 0, 0)
-		old_width = gdk_window_get_width(GDK_WINDOW(frame->window));
-		old_height = gdk_window_get_height(GDK_WINDOW(frame->window));
-	#else
-		gdk_drawable_get_size(frame->window, &old_width, &old_height);
-	#endif
-
-  gdk_window_get_position (frame->window, &old_x, &old_y);
+#if GTK_CHECK_VERSION(3, 0, 0)
+  old_width = gdk_window_get_width (frame->window);
+  old_height = gdk_window_get_height (frame->window);
+#else
+  gdk_drawable_get_size(frame->window, &old_width, &old_height);
+#endif
 
   gdk_window_move_resize (frame->window, x, y, width, height);
 
@@ -1270,8 +1268,7 @@ show_tip_now (MetaFrames *frames)
 
       screen_number = gdk_screen_get_number (gtk_widget_get_screen (GTK_WIDGET (frames)));
 
-      meta_fixed_tip_show (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
-                           screen_number,
+      meta_fixed_tip_show (screen_number,
                            rect->x + dx,
                            rect->y + rect->height + 2 + dy,
                            tiptext);
@@ -2580,7 +2577,6 @@ meta_frames_paint_to_drawable (MetaFrames   *frames,
                                int           y_offset)
                                #endif
 {
-  GtkWidget *widget;
   MetaFrameFlags flags;
   MetaFrameType type;
   GdkPixbuf *mini_icon;
@@ -2592,8 +2588,6 @@ meta_frames_paint_to_drawable (MetaFrames   *frames,
   MetaButtonLayout button_layout;
   MetaGrabOp grab_op;
 
-  widget = GTK_WIDGET (frames);
-
   for (i = 0; i < META_BUTTON_TYPE_LAST; i++)
     button_states[i] = META_BUTTON_STATE_NORMAL;
 
@@ -2694,7 +2688,6 @@ meta_frames_paint_to_drawable (MetaFrames   *frames,
 
   meta_theme_draw_frame_with_style (meta_theme_get_current (),
                                     frame->style,
-                                    widget,
                                     cr,
                                     type,
                                     flags,
@@ -2767,8 +2760,11 @@ meta_frames_paint_to_drawable (MetaFrames   *frames,
           gdk_window_begin_paint_rect (drawable, &areas[i]);
 
           meta_theme_draw_frame_with_style (meta_theme_get_current (),
+#if GTK_CHECK_VERSION (3, 0, 0)
             frame->style,
-            widget,
+#else
+            GTK_WIDGET(frames),
+#endif
             drawable,
             NULL, /* &areas[i], */
             x_offset, y_offset,
@@ -2793,8 +2789,11 @@ meta_frames_paint_to_drawable (MetaFrames   *frames,
       /* Not a window; happens about 1/3 of the time */
 
       meta_theme_draw_frame_with_style (meta_theme_get_current (),
+#if GTK_CHECK_VERSION (3, 0, 0)
                                         frame->style,
-                                        widget,
+#else
+                                        GTK_WIDGET(frames),
+#endif
                                         drawable,
                                         NULL,
                                         x_offset, y_offset,
@@ -2835,23 +2834,35 @@ meta_frames_set_window_background (MetaFrames   *frames,
 
   if (frame_exists && style->window_background_color != NULL)
     {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA color;
+#else
       GdkColor color;
+#endif
       GdkVisual *visual;
 
       meta_color_spec_render (style->window_background_color,
-                              GTK_WIDGET (frames),
+                              frame->style,
                               &color);
 
       /* Set A in ARGB to window_background_alpha, if we have ARGB */
 
       visual = gtk_widget_get_visual (GTK_WIDGET (frames));
-      if (gdk_visual_get_depth(visual) == 32) /* we have ARGB */
+      if (gdk_visual_get_depth (visual) == 32) /* we have ARGB */
+      #if GTK_CHECK_VERSION(3, 0, 0)
+        {
+          color.alpha = style->window_background_alpha / 255.0;
+        }
+
+      gdk_window_set_background_rgba (frame->window, &color);
+      #else
         {
           color.pixel = (color.pixel & 0xffffff) &
             style->window_background_alpha << 24;
         }
 
       gdk_window_set_background (frame->window, &color);
+      #endif
     }
   else
     {
diff --git a/src/ui/gradient.c b/src/ui/gradient.c
index 78a5a9eb..dfdb2fa1 100644
--- a/src/ui/gradient.c
+++ b/src/ui/gradient.c
@@ -26,9 +26,37 @@
 #include "util.h"
 #include <string.h>
 
+#include <gtk/gtk.h>
+
 /* This is all Alfredo's and Dan's usual very nice WindowMaker code,
  * slightly GTK-ized
  */
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf* meta_gradient_create_horizontal       (int             width,
+                                                         int             height,
+                                                         const GdkRGBA  *from,
+                                                         const GdkRGBA  *to);
+static GdkPixbuf* meta_gradient_create_vertical         (int             width,
+                                                         int             height,
+                                                         const GdkRGBA  *from,
+                                                         const GdkRGBA  *to);
+static GdkPixbuf* meta_gradient_create_diagonal         (int             width,
+                                                         int             height,
+                                                         const GdkRGBA  *from,
+                                                         const GdkRGBA  *to);
+static GdkPixbuf* meta_gradient_create_multi_horizontal (int             width,
+                                                         int             height,
+                                                         const GdkRGBA  *colors,
+                                                         int             count);
+static GdkPixbuf* meta_gradient_create_multi_vertical   (int             width,
+                                                         int             height,
+                                                         const GdkRGBA  *colors,
+                                                         int             count);
+static GdkPixbuf* meta_gradient_create_multi_diagonal   (int             width,
+                                                         int             height,
+                                                         const GdkRGBA  *colors,
+                                                         int             count);
+#else
 static GdkPixbuf* meta_gradient_create_horizontal       (int             width,
                                                          int             height,
                                                          const GdkColor *from,
@@ -53,6 +81,7 @@ static GdkPixbuf* meta_gradient_create_multi_diagonal   (int             width,
                                                          int             height,
                                                          const GdkColor *colors,
                                                          int             count);
+#endif
 
 
 /* Used as the destroy notification function for gdk_pixbuf_new() */
@@ -87,12 +116,21 @@ blank_pixbuf (int width, int height, gboolean no_padding)
                                    free_buffer, NULL);
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+GdkPixbuf*
+meta_gradient_create_simple (int              width,
+                             int              height,
+                             const GdkRGBA   *from,
+                             const GdkRGBA   *to,
+                             MetaGradientType style)
+#else
 GdkPixbuf*
 meta_gradient_create_simple (int              width,
                              int              height,
                              const GdkColor  *from,
                              const GdkColor  *to,
                              MetaGradientType style)
+#endif
 {
   switch (style)
     {
@@ -113,12 +151,21 @@ meta_gradient_create_simple (int              width,
   return NULL;
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+GdkPixbuf*
+meta_gradient_create_multi (int              width,
+                            int              height,
+                            const GdkRGBA   *colors,
+                            int              n_colors,
+                            MetaGradientType style)
+#else
 GdkPixbuf*
 meta_gradient_create_multi (int              width,
                             int              height,
                             const GdkColor  *colors,
                             int              n_colors,
                             MetaGradientType style)
+#endif
 {
 
   if (n_colors > 2)
@@ -155,6 +202,15 @@ meta_gradient_create_multi (int              width,
  * are alternated. I'm not sure what it's good for, just copied since
  * WindowMaker had it.
  */
+#if GTK_CHECK_VERSION (3, 0, 0)
+GdkPixbuf*
+meta_gradient_create_interwoven (int            width,
+                                 int            height,
+                                 const GdkRGBA  colors1[2],
+                                 int            thickness1,
+                                 const GdkRGBA  colors2[2],
+                                 int            thickness2)
+#else
 GdkPixbuf*
 meta_gradient_create_interwoven (int            width,
                                  int            height,
@@ -162,6 +218,7 @@ meta_gradient_create_interwoven (int            width,
                                  int            thickness1,
                                  const GdkColor colors2[2],
                                  int            thickness2)
+#endif
 {
 
   int i, j, k, l, ll;
@@ -179,6 +236,23 @@ meta_gradient_create_interwoven (int            width,
   pixels = gdk_pixbuf_get_pixels (pixbuf);
   rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  r1 = (long)(colors1[0].red*0xffffff);
+  g1 = (long)(colors1[0].green*0xffffff);
+  b1 = (long)(colors1[0].blue*0xffffff);
+
+  r2 = (long)(colors2[0].red*0xffffff);
+  g2 = (long)(colors2[0].green*0xffffff);
+  b2 = (long)(colors2[0].blue*0xffffff);
+
+  dr1 = ((colors1[1].red-colors1[0].red)*0xffffff)/(int)height;
+  dg1 = ((colors1[1].green-colors1[0].green)*0xffffff)/(int)height;
+  db1 = ((colors1[1].blue-colors1[0].blue)*0xffffff)/(int)height;
+
+  dr2 = ((colors2[1].red-colors2[0].red)*0xffffff)/(int)height;
+  dg2 = ((colors2[1].green-colors2[0].green)*0xffffff)/(int)height;
+  db2 = ((colors2[1].blue-colors2[0].blue)*0xffffff)/(int)height;
+#else
   r1 = colors1[0].red<<8;
   g1 = colors1[0].green<<8;
   b1 = colors1[0].blue<<8;
@@ -194,6 +268,7 @@ meta_gradient_create_interwoven (int            width,
   dr2 = ((colors2[1].red-colors2[0].red)<<8)/(int)height;
   dg2 = ((colors2[1].green-colors2[0].green)<<8)/(int)height;
   db2 = ((colors2[1].blue-colors2[0].blue)<<8)/(int)height;
+#endif
 
   for (i=0,k=0,l=0,ll=thickness1; i<height; i++)
     {
@@ -255,10 +330,17 @@ meta_gradient_create_interwoven (int            width,
  * 	None
  *----------------------------------------------------------------------
  */
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf*
+meta_gradient_create_horizontal (int width, int height,
+                                 const GdkRGBA  *from,
+                                 const GdkRGBA  *to)
+#else
 static GdkPixbuf*
 meta_gradient_create_horizontal (int width, int height,
                                  const GdkColor *from,
                                  const GdkColor *to)
+#endif
 {
   int i;
   long r, g, b, dr, dg, db;
@@ -277,12 +359,21 @@ meta_gradient_create_horizontal (int width, int height,
   ptr = pixels;
   rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  r0 = (guchar) (from->red * 0xff);
+  g0 = (guchar) (from->green * 0xff);
+  b0 = (guchar) (from->blue * 0xff);
+  rf = (guchar) (to->red * 0xff);
+  gf = (guchar) (to->green * 0xff);
+  bf = (guchar) (to->blue * 0xff);
+#else
   r0 = (guchar) (from->red / 256.0);
   g0 = (guchar) (from->green / 256.0);
   b0 = (guchar) (from->blue / 256.0);
   rf = (guchar) (to->red / 256.0);
   gf = (guchar) (to->green / 256.0);
   bf = (guchar) (to->blue / 256.0);
+#endif
 
   r = r0 << 16;
   g = g0 << 16;
@@ -323,10 +414,17 @@ meta_gradient_create_horizontal (int width, int height,
  *      None
  *----------------------------------------------------------------------
  */
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf*
+meta_gradient_create_vertical (int width, int height,
+                               const GdkRGBA  *from,
+                               const GdkRGBA  *to)
+#else
 static GdkPixbuf*
 meta_gradient_create_vertical (int width, int height,
                                const GdkColor *from,
                                const GdkColor *to)
+#endif
 {
   int i, j;
   long r, g, b, dr, dg, db;
@@ -344,12 +442,21 @@ meta_gradient_create_vertical (int width, int height,
   pixels = gdk_pixbuf_get_pixels (pixbuf);
   rowstride = gdk_pixbuf_get_rowstride (pixbuf);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  r0 = (guchar) (from->red * 0xff);
+  g0 = (guchar) (from->green * 0xff);
+  b0 = (guchar) (from->blue * 0xff);
+  rf = (guchar) (to->red * 0xff);
+  gf = (guchar) (to->green * 0xff);
+  bf = (guchar) (to->blue * 0xff);
+#else
   r0 = (guchar) (from->red / 256.0);
   g0 = (guchar) (from->green / 256.0);
   b0 = (guchar) (from->blue / 256.0);
   rf = (guchar) (to->red / 256.0);
   gf = (guchar) (to->green / 256.0);
   bf = (guchar) (to->blue / 256.0);
+#endif
 
   r = r0<<16;
   g = g0<<16;
@@ -393,11 +500,17 @@ meta_gradient_create_vertical (int width, int height,
  *----------------------------------------------------------------------
  */
 
-
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf*
+meta_gradient_create_diagonal (int width, int height,
+                               const GdkRGBA  *from,
+                               const GdkRGBA  *to)
+#else
 static GdkPixbuf*
 meta_gradient_create_diagonal (int width, int height,
                                const GdkColor *from,
                                const GdkColor *to)
+#endif
 {
   GdkPixbuf *pixbuf, *tmp;
   int j;
@@ -441,11 +554,17 @@ meta_gradient_create_diagonal (int width, int height,
   return pixbuf;
 }
 
-
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf*
+meta_gradient_create_multi_horizontal (int width, int height,
+                                       const GdkRGBA  *colors,
+                                       int count)
+#else
 static GdkPixbuf*
 meta_gradient_create_multi_horizontal (int width, int height,
                                        const GdkColor *colors,
                                        int count)
+#endif
 {
   int i, j, k;
   long r, g, b, dr, dg, db;
@@ -475,16 +594,28 @@ meta_gradient_create_multi_horizontal (int width, int height,
 
   k = 0;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  r = (long)(colors[0].red * 0xffffff);
+  g = (long)(colors[0].green * 0xffffff);
+  b = (long)(colors[0].blue * 0xffffff);
+#else
   r = colors[0].red << 8;
   g = colors[0].green << 8;
   b = colors[0].blue << 8;
+#endif
 
   /* render the first line */
   for (i=1; i<count; i++)
     {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      dr = (int)((colors[i].red   - colors[i-1].red)  *0xffffff)/(int)width2;
+      dg = (int)((colors[i].green - colors[i-1].green)*0xffffff)/(int)width2;
+      db = (int)((colors[i].blue  - colors[i-1].blue) *0xffffff)/(int)width2;
+#else
       dr = ((int)(colors[i].red   - colors[i-1].red)  <<8)/(int)width2;
       dg = ((int)(colors[i].green - colors[i-1].green)<<8)/(int)width2;
       db = ((int)(colors[i].blue  - colors[i-1].blue) <<8)/(int)width2;
+#endif
       for (j=0; j<width2; j++)
         {
           *ptr++ = (unsigned char)(r>>16);
@@ -495,9 +626,15 @@ meta_gradient_create_multi_horizontal (int width, int height,
           b += db;
           k++;
 	}
+#if GTK_CHECK_VERSION (3, 0, 0)
+      r = (long)(colors[i].red   * 0xffffff);
+      g = (long)(colors[i].green * 0xffffff);
+      b = (long)(colors[i].blue  * 0xffffff);
+#else
       r = colors[i].red << 8;
       g = colors[i].green << 8;
       b = colors[i].blue << 8;
+#endif
     }
   for (j=k; j<width; j++)
     {
@@ -514,10 +651,17 @@ meta_gradient_create_multi_horizontal (int width, int height,
   return pixbuf;
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf*
+meta_gradient_create_multi_vertical (int width, int height,
+                                     const GdkRGBA  *colors,
+                                     int count)
+#else
 static GdkPixbuf*
 meta_gradient_create_multi_vertical (int width, int height,
                                      const GdkColor *colors,
                                      int count)
+#endif
 {
   int i, j, k;
   long r, g, b, dr, dg, db;
@@ -547,15 +691,27 @@ meta_gradient_create_multi_vertical (int width, int height,
 
   k = 0;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  r = (long)(colors[0].red * 0xffffff);
+  g = (long)(colors[0].green * 0xffffff);
+  b = (long)(colors[0].blue * 0xffffff);
+#else
   r = colors[0].red << 8;
   g = colors[0].green << 8;
   b = colors[0].blue << 8;
+#endif
 
   for (i=1; i<count; i++)
     {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      dr = (int)((colors[i].red   - colors[i-1].red)  *0xffffff)/(int)height2;
+      dg = (int)((colors[i].green - colors[i-1].green)*0xffffff)/(int)height2;
+      db = (int)((colors[i].blue  - colors[i-1].blue) *0xffffff)/(int)height2;
+#else
       dr = ((int)(colors[i].red   - colors[i-1].red)  <<8)/(int)height2;
       dg = ((int)(colors[i].green - colors[i-1].green)<<8)/(int)height2;
       db = ((int)(colors[i].blue  - colors[i-1].blue) <<8)/(int)height2;
+#endif
 
       for (j=0; j<height2; j++)
         {
@@ -574,9 +730,15 @@ meta_gradient_create_multi_vertical (int width, int height,
           b += db;
           k++;
 	}
+#if GTK_CHECK_VERSION (3, 0, 0)
+      r = (long)(colors[i].red   * 0xffffff);
+      g = (long)(colors[i].green * 0xffffff);
+      b = (long)(colors[i].blue  * 0xffffff);
+#else
       r = colors[i].red << 8;
       g = colors[i].green << 8;
       b = colors[i].blue << 8;
+#endif
     }
 
   if (k<height)
@@ -603,11 +765,17 @@ meta_gradient_create_multi_vertical (int width, int height,
   return pixbuf;
 }
 
-
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf*
+meta_gradient_create_multi_diagonal (int width, int height,
+                                     const GdkRGBA  *colors,
+                                     int count)
+#else
 static GdkPixbuf*
 meta_gradient_create_multi_diagonal (int width, int height,
                                      const GdkColor *colors,
                                      int count)
+#endif
 {
   GdkPixbuf *pixbuf, *tmp;
   float a, offset;
diff --git a/src/ui/gradient.h b/src/ui/gradient.h
index b65b3878..7cbe8977 100644
--- a/src/ui/gradient.h
+++ b/src/ui/gradient.h
@@ -26,6 +26,7 @@
 
 #include <gdk-pixbuf/gdk-pixbuf.h>
 #include <gdk/gdk.h>
+#include <gtk/gtk.h>
 
 typedef enum
 {
@@ -35,6 +36,24 @@ typedef enum
   META_GRADIENT_LAST
 } MetaGradientType;
 
+#if GTK_CHECK_VERSION (3, 0 ,0)
+GdkPixbuf* meta_gradient_create_simple     (int               width,
+                                            int               height,
+                                            const GdkRGBA    *from,
+                                            const GdkRGBA    *to,
+                                            MetaGradientType  style);
+GdkPixbuf* meta_gradient_create_multi      (int               width,
+                                            int               height,
+                                            const GdkRGBA    *colors,
+                                            int               n_colors,
+                                            MetaGradientType  style);
+GdkPixbuf* meta_gradient_create_interwoven (int               width,
+                                            int               height,
+                                            const GdkRGBA     colors1[2],
+                                            int               thickness1,
+                                            const GdkRGBA     colors2[2],
+                                            int               thickness2);
+#else
 GdkPixbuf* meta_gradient_create_simple     (int               width,
                                             int               height,
                                             const GdkColor   *from,
@@ -51,6 +70,7 @@ GdkPixbuf* meta_gradient_create_interwoven (int               width,
                                             int               thickness1,
                                             const GdkColor    colors2[2],
                                             int               thickness2);
+#endif
 
 
 /* Generate an alpha gradient and multiply it with the existing alpha
diff --git a/src/ui/menu.c b/src/ui/menu.c
index 41abc441..1dfc7140 100644
--- a/src/ui/menu.c
+++ b/src/ui/menu.c
@@ -106,7 +106,11 @@ static void popup_position_func(GtkMenu* menu, gint* x, gint* y, gboolean* push_
 
 	pos = user_data;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+	gtk_widget_get_preferred_size (GTK_WIDGET (menu), &req, NULL);
+#else
 	gtk_widget_size_request(GTK_WIDGET(menu), &req);
+#endif
 
 	*x = pos->x;
 	*y = pos->y;
@@ -148,7 +152,7 @@ static void activate_cb(GtkWidget* menuitem, gpointer data)
 
   md = data;
 
-	meta_frames_notify_menu_hide(md->menu->frames);
+  meta_frames_notify_menu_hide (md->menu->frames);
 
 	(*md->menu->func)(
 		md->menu,
@@ -159,7 +163,7 @@ static void activate_cb(GtkWidget* menuitem, gpointer data)
 		GPOINTER_TO_INT(g_object_get_data(G_OBJECT(menuitem), "workspace")),
 		md->menu->data);
 
-	/* menu may now be freed */
+  /* menu may now be freed */
 }
 
 /*
@@ -389,7 +393,7 @@ meta_window_menu_new   (MetaFrames         *frames,
                   meta_verbose ("Creating %d-workspace menu current space %lu\n",
                       n_workspaces, active_workspace);
 
-                  GdkWindow* window = gtk_widget_get_window(GTK_WIDGET(frames));
+                  GdkWindow* window = gtk_widget_get_window (GTK_WIDGET (frames));
 
                   display = GDK_WINDOW_XDISPLAY (window);
 
@@ -497,9 +501,10 @@ meta_window_menu_new   (MetaFrames         *frames,
         }
     }
 
-	g_signal_connect (menu->menu, "selection_done", G_CALLBACK(menu_closed), menu);
+  g_signal_connect (menu->menu, "selection_done",
+                    G_CALLBACK (menu_closed), menu);
 
-	return menu;
+  return menu;
 }
 
 void meta_window_menu_popup(MetaWindowMenu* menu, int root_x, int root_y, int button, guint32 timestamp)
diff --git a/src/ui/preview-widget.c b/src/ui/preview-widget.c
index 0bc6b42a..58122706 100644
--- a/src/ui/preview-widget.c
+++ b/src/ui/preview-widget.c
@@ -253,6 +253,66 @@ ensure_info (MetaPreview *preview)
 }
 #if GTK_CHECK_VERSION(3, 0, 0)
 
+static gboolean
+meta_preview_draw (GtkWidget *widget,
+                   cairo_t   *cr)
+{
+  MetaPreview *preview;
+  GtkAllocation allocation;
+  int border_width;
+  int client_width;
+  int client_height;
+  MetaButtonState button_states[META_BUTTON_TYPE_LAST] =
+  {
+    META_BUTTON_STATE_NORMAL,
+    META_BUTTON_STATE_NORMAL,
+    META_BUTTON_STATE_NORMAL,
+    META_BUTTON_STATE_NORMAL
+  };
+
+  g_return_val_if_fail (META_IS_PREVIEW (widget), FALSE);
+
+  preview = META_PREVIEW (widget);
+
+  ensure_info (preview);
+
+  cairo_save (cr);
+
+  border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
+
+  gtk_widget_get_allocation (widget, &allocation);
+  client_width = allocation.width - preview->left_width - preview->right_width - border_width * 2;
+  client_height = allocation.height - preview->top_height - preview->bottom_height - border_width * 2;
+
+  if (client_width < 0)
+    client_width = 1;
+  if (client_height < 0)
+    client_height = 1;
+
+  if (preview->theme)
+    {
+      border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
+
+      meta_theme_draw_frame (preview->theme,
+                             widget,
+                             cr,
+                             preview->type,
+                             preview->flags,
+                             client_width, client_height,
+                             preview->layout,
+                             preview->text_height,
+                             &preview->button_layout,
+                             button_states,
+                             meta_preview_get_mini_icon (),
+                             meta_preview_get_icon ());
+    }
+
+  cairo_restore (cr);
+
+  /* draw child */
+  return GTK_WIDGET_CLASS (meta_preview_parent_class)->draw (widget, cr);
+}
+
 static void
 meta_preview_get_preferred_width (GtkWidget *widget,
                                   gint      *minimum,
@@ -325,66 +385,6 @@ meta_preview_get_preferred_height (GtkWidget *widget,
   *natural += border_width * 2;
 }
 
-static gboolean
-meta_preview_draw(GtkWidget   *widget,
-				  cairo_t     *cr)
-{
-  MetaPreview *preview;
-  GtkAllocation allocation;
-  int border_width;
-  int client_width;
-  int client_height;
-  MetaButtonState button_states[META_BUTTON_TYPE_LAST] =
-  {
-    META_BUTTON_STATE_NORMAL,
-    META_BUTTON_STATE_NORMAL,
-    META_BUTTON_STATE_NORMAL,
-    META_BUTTON_STATE_NORMAL
-  };
-
-  g_return_val_if_fail (META_IS_PREVIEW (widget), FALSE);
-
-  preview = META_PREVIEW (widget);
-
-  ensure_info (preview);
-
-  cairo_save (cr);
-
-  border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
-
-  gtk_widget_get_allocation (widget, &allocation);
-  client_width = allocation.width - preview->left_width - preview->right_width - border_width * 2;
-  client_height = allocation.height - preview->top_height - preview->bottom_height - border_width * 2;
-
-  if (client_width < 0)
-    client_width = 1;
-  if (client_height < 0)
-    client_height = 1;
-
-  if (preview->theme)
-    {
-      border_width = gtk_container_get_border_width (GTK_CONTAINER (widget));
-
-      meta_theme_draw_frame (preview->theme,
-                             widget,
-                             cr,
-                             preview->type,
-                             preview->flags,
-                             client_width, client_height,
-                             preview->layout,
-                             preview->text_height,
-                             &preview->button_layout,
-                             button_states,
-                             meta_preview_get_mini_icon (),
-                             meta_preview_get_icon ());
-    }
-
-  cairo_restore (cr);
-
-  /* draw child */
-  return GTK_WIDGET_CLASS (meta_preview_parent_class)->draw (widget, cr);
-}
-
 #else
 
 static gboolean
diff --git a/src/ui/resizepopup.c b/src/ui/resizepopup.c
index 7dc6ec5a..977b196b 100644
--- a/src/ui/resizepopup.c
+++ b/src/ui/resizepopup.c
@@ -126,7 +126,7 @@ update_size_window (MetaResizePopup *popup)
   if (gtk_widget_get_realized (popup->size_window))
     {
       /* using move_resize to avoid jumpiness */
-      gdk_window_move_resize (gtk_widget_get_window(GTK_WIDGET(popup->size_window)),
+      gdk_window_move_resize (gtk_widget_get_window (popup->size_window),
                               x, y,
                               width, height);
     }
diff --git a/src/ui/tabpopup.c b/src/ui/tabpopup.c
index 4c4cf308..dfbdf1a4 100644
--- a/src/ui/tabpopup.c
+++ b/src/ui/tabpopup.c
@@ -81,15 +81,23 @@ static void       select_workspace         (GtkWidget *widget);
 static void       unselect_workspace       (GtkWidget *widget);
 
 static gboolean
+#if GTK_CHECK_VERSION (3, 0, 0)
+outline_window_draw (GtkWidget *widget,
+                     cairo_t   *cr,
+                     gpointer   data)
+#else
 outline_window_expose (GtkWidget      *widget,
                        GdkEventExpose *event,
                        gpointer        data)
+#endif
 {
   MetaTabPopup *popup;
   TabEntry *te;
+#if !GTK_CHECK_VERSION (3, 0, 0)
   GtkStyle *style;
   GdkWindow *window;
   cairo_t *cr;
+#endif
 
   popup = data;
 
@@ -97,12 +105,18 @@ outline_window_expose (GtkWidget      *widget,
     return FALSE;
 
   te = popup->current_selected_entry;
+#if !GTK_CHECK_VERSION (3, 0, 0)
   window = gtk_widget_get_window (widget);
   style = gtk_widget_get_style (widget);
   cr = gdk_cairo_create (window);
+#endif
 
   cairo_set_line_width (cr, 1.0);
+#if GTK_CHECK_VERSION (3, 0, 0)
+  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+#else
   gdk_cairo_set_source_color (cr, &style->white);
+#endif
 
   cairo_rectangle (cr,
                    0.5, 0.5,
@@ -116,7 +130,9 @@ outline_window_expose (GtkWidget      *widget,
                    te->inner_rect.height + 1);
   cairo_stroke (cr);
 
+#if !GTK_CHECK_VERSION (3, 0, 0)
   cairo_destroy (cr);
+#endif
 
   return FALSE;
 }
@@ -236,7 +252,11 @@ meta_ui_tab_popup_new (const MetaTabEntry *entries,
   MetaTabPopup *popup;
   int i, left, right, top, bottom;
   int height;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GtkWidget *grid;
+#else
   GtkWidget *table;
+#endif
   GtkWidget *vbox;
   GtkWidget *align;
   GList *tmp;
@@ -258,8 +278,13 @@ meta_ui_tab_popup_new (const MetaTabEntry *entries,
   gtk_widget_set_app_paintable (popup->outline_window, TRUE);
   gtk_widget_realize (popup->outline_window);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  g_signal_connect (G_OBJECT (popup->outline_window), "draw",
+                    G_CALLBACK (outline_window_draw), popup);
+#else
   g_signal_connect (G_OBJECT (popup->outline_window), "expose_event",
                     G_CALLBACK (outline_window_expose), popup);
+#endif
 
   popup->window = gtk_window_new (GTK_WINDOW_POPUP);
 
@@ -290,12 +315,21 @@ meta_ui_tab_popup_new (const MetaTabEntry *entries,
   if (i % width)
     height += 1;
 
-  table = gtk_table_new (height, width, FALSE);
   vbox = gtk_vbox_new (FALSE, 0);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  grid = gtk_grid_new ();
+#else
+  table = gtk_table_new (height, width, FALSE);
+#endif
+
   frame = gtk_frame_new (NULL);
   gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
+#if GTK_CHECK_VERSION (3, 0, 0)
+  gtk_container_set_border_width (GTK_CONTAINER (grid), 1);
+#else
   gtk_container_set_border_width (GTK_CONTAINER (table), 1);
+#endif
   gtk_container_add (GTK_CONTAINER (popup->window),
                      frame);
   gtk_container_add (GTK_CONTAINER (frame),
@@ -305,8 +339,13 @@ meta_ui_tab_popup_new (const MetaTabEntry *entries,
 
   gtk_box_pack_start (GTK_BOX (vbox), align, TRUE, TRUE, 0);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  gtk_container_add (GTK_CONTAINER (align),
+                     grid);
+#else
   gtk_container_add (GTK_CONTAINER (align),
                      table);
+#endif
 
   popup->label = gtk_label_new ("");
 
@@ -368,16 +407,24 @@ meta_ui_tab_popup_new (const MetaTabEntry *entries,
 
           te->widget = image;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+          gtk_grid_attach (GTK_GRID (grid), te->widget, left, top, 1, 1);
+#else
           gtk_table_attach (GTK_TABLE (table),
                             te->widget,
                             left, right,           top, bottom,
                             0,                     0,
                             0,                     0);
+#endif
 
           /* Efficiency rules! */
           gtk_label_set_markup (GTK_LABEL (popup->label),
                               te->title);
+#if GTK_CHECK_VERSION (3, 0, 0)
+          gtk_widget_get_preferred_size (popup->label, &req, NULL);
+#else
           gtk_widget_size_request (popup->label, &req);
+#endif
           max_label_width = MAX (max_label_width, req.width);
 
           tmp = tmp->next;
@@ -431,7 +478,8 @@ meta_ui_tab_popup_free (MetaTabPopup *popup)
 {
   meta_verbose ("Destroying tab popup window\n");
 
-  gtk_widget_destroy (popup->outline_window);
+  if (popup->outline_window != NULL)
+    gtk_widget_destroy (popup->outline_window);
   gtk_widget_destroy (popup->window);
 
   g_list_foreach (popup->entries, free_tab_entry, NULL);
@@ -736,7 +784,11 @@ meta_select_image_draw (GtkWidget *widget,
 
       misc = GTK_MISC (widget);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+      gtk_widget_get_preferred_size (widget, &requisition, NULL);
+#else
       gtk_widget_get_requisition (widget, &requisition);
+#endif
       gtk_misc_get_alignment (misc, &xalign, &yalign);
       gtk_misc_get_padding (misc, &xpad, &ypad);
 
@@ -895,8 +947,8 @@ unselect_workspace (GtkWidget *widget)
 static void meta_select_workspace_class_init (MetaSelectWorkspaceClass *klass);
 
 #if GTK_CHECK_VERSION(3, 0, 0)
-static gboolean meta_select_workspace_draw         (GtkWidget      *widget,
-                                                    cairo_t        *cr);
+static gboolean meta_select_workspace_draw (GtkWidget *widget,
+                                            cairo_t   *cr);
 #else
 static gboolean meta_select_workspace_expose_event (GtkWidget      *widget,
                                                     GdkEventExpose *event);
diff --git a/src/ui/testgradient.c b/src/ui/testgradient.c
index 8f8cd6a5..8875452d 100644
--- a/src/ui/testgradient.c
+++ b/src/ui/testgradient.c
@@ -23,12 +23,6 @@
 #include "gradient.h"
 #include <gtk/gtk.h>
 
-#ifdef __GNUC__
-#define UNUSED_VARIABLE __attribute__ ((unused))
-#else
-#define UNUSED_VARIABLE
-#endif
-
 typedef void (* RenderGradientFunc) (
 #if !GTK_CHECK_VERSION (3, 0, 0)
                                      GdkDrawable *drawable,
@@ -47,14 +41,27 @@ draw_checkerboard (GdkDrawable *drawable,
                    int          height)
 {
   gint i, j, xcount, ycount;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA color1, color2;
+#else
   GdkColor color1, color2;
-#if !GTK_CHECK_VERSION (3, 0, 0)
   cairo_t *cr;
 #endif
 
 #define CHECK_SIZE 10
 #define SPACING 2
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  color1.red = 30000. / 65535.;
+  color1.green = 30000. / 65535.;
+  color1.blue = 30000. / 65535.;
+  color1.alpha = 1.0;
+
+  color2.red = 50000. / 65535.;
+  color2.green = 50000. / 65535.;
+  color2.blue = 50000. / 65535.;
+  color2.alpha = 1.0;
+#else
   color1.red = 30000;
   color1.green = 30000;
   color1.blue = 30000;
@@ -63,7 +70,6 @@ draw_checkerboard (GdkDrawable *drawable,
   color2.green = 50000;
   color2.blue = 50000;
 
-#if !GTK_CHECK_VERSION (3, 0, 0)
   cr = gdk_cairo_create (drawable);
 #endif
 
@@ -76,9 +82,17 @@ draw_checkerboard (GdkDrawable *drawable,
       while (j < height)
 	{
 	  if (ycount % 2)
+#if GTK_CHECK_VERSION (3, 0, 0)
+	    gdk_cairo_set_source_rgba (cr, &color1);
+#else
 	    gdk_cairo_set_source_color (cr, &color1);
+#endif
 	  else
+#if GTK_CHECK_VERSION (3, 0, 0)
+	    gdk_cairo_set_source_rgba (cr, &color2);
+#else
 	    gdk_cairo_set_source_color (cr, &color2);
+#endif
 
 	  /* If we're outside event->area, this will do nothing.
 	   * It might be mildly more efficient if we handled
@@ -111,10 +125,17 @@ render_simple (
                gboolean    with_alpha)
 {
   GdkPixbuf *pixbuf;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA from, to;
+
+  gdk_rgba_parse (&from, "blue");
+  gdk_rgba_parse (&to, "green");
+#else
   GdkColor from, to;
 
   gdk_color_parse ("blue", &from);
   gdk_color_parse ("green", &to);
+#endif
 
   pixbuf = meta_gradient_create_simple (width, height,
                                         &from, &to,
@@ -138,7 +159,7 @@ render_simple (
                                META_GRADIENT_HORIZONTAL);
 
 #if GTK_CHECK_VERSION (3, 0, 0)
-      draw_checkerboard (cr , width, height);
+      draw_checkerboard (cr, width, height);
 #else
       draw_checkerboard (drawable, width, height);
 #endif
@@ -222,6 +243,16 @@ render_multi (
 {
   GdkPixbuf *pixbuf;
 #define N_COLORS 5
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA colors[N_COLORS];
+
+  gdk_rgba_parse (&colors[0], "red");
+  gdk_rgba_parse (&colors[1], "blue");
+  gdk_rgba_parse (&colors[2], "orange");
+  gdk_rgba_parse (&colors[3], "pink");
+  gdk_rgba_parse (&colors[4], "green");
+#else
   GdkColor colors[N_COLORS];
 
   gdk_color_parse ("red", &colors[0]);
@@ -229,6 +260,7 @@ render_multi (
   gdk_color_parse ("orange", &colors[2]);
   gdk_color_parse ("pink", &colors[3]);
   gdk_color_parse ("green", &colors[4]);
+#endif
 
   pixbuf = meta_gradient_create_multi (width, height,
                                        colors, N_COLORS,
@@ -297,12 +329,22 @@ render_interwoven_func (
 {
   GdkPixbuf *pixbuf;
 #define N_COLORS 4
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA colors[N_COLORS];
+
+  gdk_rgba_parse (&colors[0], "red");
+  gdk_rgba_parse (&colors[1], "blue");
+  gdk_rgba_parse (&colors[2], "pink");
+  gdk_rgba_parse (&colors[3], "green");
+#else
   GdkColor colors[N_COLORS];
 
   gdk_color_parse ("red", &colors[0]);
   gdk_color_parse ("blue", &colors[1]);
   gdk_color_parse ("pink", &colors[2]);
   gdk_color_parse ("green", &colors[3]);
+#endif
 
   pixbuf = meta_gradient_create_interwoven (width, height,
                                             colors, height / 10,
@@ -327,21 +369,34 @@ expose_callback (GtkWidget *widget,
 #endif
 {
   RenderGradientFunc func = data;
-  GdkWindow *window;
   GtkAllocation allocation;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GtkStyleContext *style;
+  GdkRGBA color;
+
+  style = gtk_widget_get_style_context (widget);
+
+  gtk_style_context_save (style);
+  gtk_style_context_set_state (style, gtk_widget_get_state_flags (widget));
+  gtk_style_context_lookup_color (style, "foreground-color", &color);
+  gtk_style_context_restore (style);
+#else
+  GdkWindow *window;
   GtkStyle *style;
-#if !GTK_CHECK_VERSION (3, 0, 0)
   cairo_t *cr;
-#endif
 
   style = gtk_widget_get_style (widget);
+#endif
+
   gtk_widget_get_allocation (widget, &allocation);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  cairo_set_source_rgba (cr, color.red, color.green, color.blue, color.alpha);
+#else
   window = gtk_widget_get_window (widget);
-#if !GTK_CHECK_VERSION (3, 0, 0)
   cr = gdk_cairo_create (window);
-#endif
   gdk_cairo_set_source_color (cr, &style->fg[gtk_widget_get_state (widget)]);
+#endif
 
   (* func) (
 #if !GTK_CHECK_VERSION (3, 0, 0)
@@ -399,31 +454,29 @@ create_gradient_window (const char *title,
 static void
 meta_gradient_test (void)
 {
-  GtkWidget UNUSED_VARIABLE *window;
-
-  window = create_gradient_window ("Simple vertical",
-                                   render_vertical_func);
+  create_gradient_window ("Simple vertical",
+                          render_vertical_func);
 
-  window = create_gradient_window ("Simple horizontal",
-                                   render_horizontal_func);
+  create_gradient_window ("Simple horizontal",
+                          render_horizontal_func);
 
-  window = create_gradient_window ("Simple diagonal",
-                                   render_diagonal_func);
+  create_gradient_window ("Simple diagonal",
+                          render_diagonal_func);
 
-  window = create_gradient_window ("Multi vertical",
-                                   render_vertical_multi_func);
+  create_gradient_window ("Multi vertical",
+                          render_vertical_multi_func);
 
-  window = create_gradient_window ("Multi horizontal",
-                                   render_horizontal_multi_func);
+  create_gradient_window ("Multi horizontal",
+                          render_horizontal_multi_func);
 
-  window = create_gradient_window ("Multi diagonal",
-                                   render_diagonal_multi_func);
+  create_gradient_window ("Multi diagonal",
+                          render_diagonal_multi_func);
 
-  window = create_gradient_window ("Interwoven",
-                                   render_interwoven_func);
+  create_gradient_window ("Interwoven",
+                          render_interwoven_func);
 
-  window = create_gradient_window ("Simple diagonal with horizontal multi alpha",
-                                   render_diagonal_alpha_func);
+  create_gradient_window ("Simple diagonal with horizontal multi alpha",
+                          render_diagonal_alpha_func);
 
 }
 
diff --git a/src/ui/theme-parser.c b/src/ui/theme-parser.c
index dccb47ad..f60c7619 100644
--- a/src/ui/theme-parser.c
+++ b/src/ui/theme-parser.c
@@ -190,12 +190,12 @@ static void parse_shadow_element    (GMarkupParseContext  *context,
                                      ParseInfo            *info,
                                      GError              **error);
 
-static void parse_padding_element    (GMarkupParseContext  *context,
-                                      const gchar          *element_name,
-                                      const gchar         **attribute_names,
-                                      const gchar         **attribute_values,
-                                      ParseInfo            *info,
-                                      GError              **error);
+static void parse_padding_element   (GMarkupParseContext  *context,
+                                     const gchar          *element_name,
+                                     const gchar         **attribute_names,
+                                     const gchar         **attribute_values,
+                                     ParseInfo            *info,
+                                     GError              **error);
 #endif
 static void parse_menu_icon_element (GMarkupParseContext  *context,
                                      const gchar          *element_name,
diff --git a/src/ui/theme.c b/src/ui/theme.c
index 2e13fd25..a7dc8d08 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -63,6 +63,23 @@
 #define __USE_XOPEN
 #include <math.h>
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+#define MATE_DESKTOP_USE_UNSTABLE_API
+#include <libmate-desktop/mate-desktop-utils.h>
+#endif
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+#define GDK_COLOR_RGBA(color)                                           \
+                         ((guint32) (0xff                         |     \
+                                     ((int)((color).red * 255) << 24)   |    \
+                                     ((int)((color).green * 255) << 16) |    \
+                                     ((int)((color).blue * 255) << 8)))
+
+#define GDK_COLOR_RGB(color)                                            \
+                         ((guint32) (((int)((color).red * 255) << 16)   |    \
+                                     ((int)((color).green * 255) << 8)  |    \
+                                     ((int)((color).blue * 255))))
+#else
 #define GDK_COLOR_RGBA(color)                                           \
                          ((guint32) (0xff                         |     \
                                      (((color).red / 256) << 24)   |    \
@@ -73,6 +90,7 @@
                          ((guint32) ((((color).red / 256) << 16)   |    \
                                      (((color).green / 256) << 8)  |    \
                                      (((color).blue / 256))))
+#endif
 
 #define ALPHA_TO_UCHAR(d) ((unsigned char) ((d) * 255))
 
@@ -80,9 +98,15 @@
 #define CLAMP_UCHAR(v) ((guchar) (CLAMP (((int)v), (int)0, (int)255)))
 #define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void gtk_style_shade		(GdkRGBA	 *a,
+					 GdkRGBA	 *b,
+					 gdouble	  k);
+#else
 static void gtk_style_shade		(GdkColor	 *a,
 					 GdkColor	 *b,
 					 gdouble	  k);
+#endif
 static void rgb_to_hls			(gdouble	 *r,
 					 gdouble	 *g,
 					 gdouble	 *b);
@@ -95,9 +119,15 @@ static void hls_to_rgb			(gdouble	 *h,
  */
 static MetaTheme *meta_current_theme = NULL;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+static GdkPixbuf *
+colorize_pixbuf (GdkPixbuf *orig,
+                 GdkRGBA   *new_color)
+#else
 static GdkPixbuf *
 colorize_pixbuf (GdkPixbuf *orig,
                  GdkColor  *new_color)
+#endif
 {
   GdkPixbuf *pixbuf;
   double intensity;
@@ -140,16 +170,28 @@ colorize_pixbuf (GdkPixbuf *orig,
           if (intensity <= 0.5)
             {
               /* Go from black at intensity = 0.0 to new_color at intensity = 0.5 */
+#if GTK_CHECK_VERSION (3, 0, 0)
+              dr = new_color->red * intensity * 2.0;
+              dg = new_color->green * intensity * 2.0;
+              db = new_color->blue * intensity * 2.0;
+#else
               dr = (new_color->red * intensity * 2.0) / 65535.0;
               dg = (new_color->green * intensity * 2.0) / 65535.0;
               db = (new_color->blue * intensity * 2.0) / 65535.0;
+#endif
             }
           else
             {
               /* Go from new_color at intensity = 0.5 to white at intensity = 1.0 */
+#if GTK_CHECK_VERSION (3, 0, 0)
+              dr = new_color->red + (1.0 - new_color->red) * (intensity - 0.5) * 2.0;
+              dg = new_color->green + (1.0 - new_color->green) * (intensity - 0.5) * 2.0;
+              db = new_color->blue + (1.0 - new_color->blue) * (intensity - 0.5) * 2.0;
+#else
               dr = (new_color->red + (65535 - new_color->red) * (intensity - 0.5) * 2.0) / 65535.0;
               dg = (new_color->green + (65535 - new_color->green) * (intensity - 0.5) * 2.0) / 65535.0;
               db = (new_color->blue + (65535 - new_color->blue) * (intensity - 0.5) * 2.0) / 65535.0;
+#endif
             }
 
           dest[0] = CLAMP_UCHAR (255 * dr);
@@ -173,6 +215,19 @@ colorize_pixbuf (GdkPixbuf *orig,
   return pixbuf;
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void
+color_composite (const GdkRGBA *bg,
+                 const GdkRGBA *fg,
+                 double         alpha,
+                 GdkRGBA       *color)
+{
+  *color = *bg;
+  color->red = color->red + (fg->red - color->red) * alpha;
+  color->green = color->green + (fg->green - color->green) * alpha;
+  color->blue = color->blue + (fg->blue - color->blue) * alpha;
+}
+#else
 static void
 color_composite (const GdkColor *bg,
                  const GdkColor *fg,
@@ -187,6 +242,7 @@ color_composite (const GdkColor *bg,
   color->green = color->green + (((fg->green - color->green) * alpha + 0x8000) >> 16);
   color->blue = color->blue + (((fg->blue - color->blue) * alpha + 0x8000) >> 16);
 }
+#endif
 
 /**
  * Sets all the fields of a border to dummy values.
@@ -939,7 +995,6 @@ meta_frame_layout_calc_geometry (const MetaFrameLayout  *layout,
       else
         g_memmove (&(rect->clickable), &(rect->visible), sizeof(rect->clickable));
 
-
       x = rect->visible.x + rect->visible.width + layout->button_border.right;
       if (left_buttons_has_spacer[i])
         x += (button_width * 0.75);
@@ -1015,14 +1070,26 @@ meta_gradient_spec_free (MetaGradientSpec *spec)
   g_free (spec);
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+GdkPixbuf*
+meta_gradient_spec_render (const MetaGradientSpec *spec,
+                           GtkStyleContext        *style,
+                           int                     width,
+                           int                     height)
+#else
 GdkPixbuf*
 meta_gradient_spec_render (const MetaGradientSpec *spec,
-                           GtkWidget              *widget,
+                           GtkStyle               *style,
                            int                     width,
                            int                     height)
+#endif
 {
   int n_colors;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA *colors;
+#else
   GdkColor *colors;
+#endif
   GSList *tmp;
   int i;
   GdkPixbuf *pixbuf;
@@ -1032,13 +1099,17 @@ meta_gradient_spec_render (const MetaGradientSpec *spec,
   if (n_colors == 0)
     return NULL;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  colors = g_new (GdkRGBA, n_colors);
+#else
   colors = g_new (GdkColor, n_colors);
+#endif
 
   i = 0;
   tmp = spec->color_specs;
   while (tmp != NULL)
     {
-      meta_color_spec_render (tmp->data, widget, &colors[i]);
+      meta_color_spec_render (tmp->data, style, &colors[i]);
 
       tmp = tmp->next;
       ++i;
@@ -1178,7 +1249,11 @@ meta_color_spec_new_from_string (const char *str,
       const char *bracket;
       const char *end_bracket;
       char *tmp;
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GtkStateFlags state;
+#else
       GtkStateType state;
+#endif
       MetaGtkColorComponent component;
 
       bracket = str;
@@ -1371,7 +1446,11 @@ meta_color_spec_new_from_string (const char *str,
     {
       spec = meta_color_spec_new (META_COLOR_SPEC_BASIC);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+      if (!gdk_rgba_parse (&spec->data.basic.color, str))
+#else
       if (!gdk_color_parse (str, &spec->data.basic.color))
+#endif
         {
           g_set_error (err, META_THEME_ERROR,
                        META_THEME_ERROR_FAILED,
@@ -1387,9 +1466,15 @@ meta_color_spec_new_from_string (const char *str,
   return spec;
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+MetaColorSpec*
+meta_color_spec_new_gtk (MetaGtkColorComponent component,
+                         GtkStateFlags         state)
+#else
 MetaColorSpec*
 meta_color_spec_new_gtk (MetaGtkColorComponent component,
                          GtkStateType          state)
+#endif
 {
   MetaColorSpec *spec;
 
@@ -1401,18 +1486,111 @@ meta_color_spec_new_gtk (MetaGtkColorComponent component,
   return spec;
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void
+meta_set_color_from_style (GdkRGBA               *color,
+                           GtkStyleContext       *context,
+                           GtkStateFlags          state,
+                           MetaGtkColorComponent  component)
+{
+  GdkRGBA other;
+
+  switch (component)
+    {
+    case META_GTK_COLOR_BG:
+    case META_GTK_COLOR_BASE:
+      gtk_style_context_get_background_color (context, state, color);
+      break;
+    case META_GTK_COLOR_FG:
+    case META_GTK_COLOR_TEXT:
+      gtk_style_context_get_color (context, state, color);
+      break;
+    case META_GTK_COLOR_TEXT_AA:
+      gtk_style_context_get_color (context, state, color);
+      meta_set_color_from_style (&other, context, state, META_GTK_COLOR_BASE);
+
+      color->red = (color->red + other.red) / 2;
+      color->green = (color->green + other.green) / 2;
+      color->blue = (color->blue + other.blue) / 2;
+      break;
+    case META_GTK_COLOR_MID:
+      mate_desktop_gtk_style_get_light_color (context, state, color);
+      mate_desktop_gtk_style_get_dark_color (context, state, &other);
+
+      color->red = (color->red + other.red) / 2;
+      color->green = (color->green + other.green) / 2;
+      color->blue = (color->blue + other.blue) / 2;
+      break;
+    case META_GTK_COLOR_LIGHT:
+      mate_desktop_gtk_style_get_light_color (context, state, color);
+      break;
+    case META_GTK_COLOR_DARK:
+      mate_desktop_gtk_style_get_dark_color (context, state, color);
+      break;
+    case META_GTK_COLOR_LAST:
+      g_assert_not_reached ();
+      break;
+    }
+}
+#else
+static void
+meta_set_color_from_style (GdkColor              *color,
+                           GtkStyle              *widget_style,
+                           GtkStateType          state,
+                           MetaGtkColorComponent  component)
+{
+	 switch (component)
+	 {
+		 case META_GTK_COLOR_BG:
+			 *color = widget_style->bg[state];
+			 break;
+		 case META_GTK_COLOR_FG:
+			 *color = widget_style->fg[state];
+			 break;
+		 case META_GTK_COLOR_BASE:
+			 *color = widget_style->base[state];
+			 break;
+		 case META_GTK_COLOR_TEXT:
+			 *color = widget_style->text[state];
+			 break;
+		 case META_GTK_COLOR_LIGHT:
+			 *color = widget_style->light[state];
+			 break;
+		 case META_GTK_COLOR_DARK:
+			 *color = widget_style->dark[state];
+			 break;
+		 case META_GTK_COLOR_MID:
+			 *color = widget_style->mid[state];
+			 break;
+		 case META_GTK_COLOR_TEXT_AA:
+			 *color = widget_style->text_aa[state];
+			 break;
+		 case META_GTK_COLOR_LAST:
+			 g_assert_not_reached ();
+			 break;
+	 }
+}
+#endif
+
+#if GTK_CHECK_VERSION (3, 0, 0)
+void
+meta_color_spec_render (MetaColorSpec *spec,
+                        GtkStyleContext *style,
+                        GdkRGBA         *color)
+#else
 void
 meta_color_spec_render (MetaColorSpec *spec,
-                        GtkWidget     *widget,
+                        GtkStyle      *style,
                         GdkColor      *color)
+#endif
 {
-  GtkStyle *widget_style;
-
   g_return_if_fail (spec != NULL);
-  g_return_if_fail (GTK_IS_WIDGET (widget));
 
-  widget_style = gtk_widget_get_style (widget);
-  g_return_if_fail (widget_style != NULL);
+#if GTK_CHECK_VERSION (3, 0, 0)
+  g_return_if_fail (GTK_IS_STYLE_CONTEXT (style));
+#else
+  g_return_if_fail (style != NULL);
+#endif
 
   switch (spec->type)
     {
@@ -1421,44 +1599,22 @@ meta_color_spec_render (MetaColorSpec *spec,
       break;
 
     case META_COLOR_SPEC_GTK:
-      switch (spec->data.gtk.component)
-        {
-        case META_GTK_COLOR_BG:
-          *color = widget_style->bg[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_FG:
-          *color = widget_style->fg[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_BASE:
-          *color = widget_style->base[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_TEXT:
-          *color = widget_style->text[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_LIGHT:
-          *color = widget_style->light[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_DARK:
-          *color = widget_style->dark[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_MID:
-          *color = widget_style->mid[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_TEXT_AA:
-          *color = widget_style->text_aa[spec->data.gtk.state];
-          break;
-        case META_GTK_COLOR_LAST:
-          g_assert_not_reached ();
-          break;
-        }
+      meta_set_color_from_style (color,
+                                 style,
+                                 spec->data.gtk.state,
+                                 spec->data.gtk.component);
       break;
 
     case META_COLOR_SPEC_BLEND:
       {
+#if GTK_CHECK_VERSION (3, 0, 0)
+        GdkRGBA bg, fg;
+#else
         GdkColor bg, fg;
+#endif
 
-        meta_color_spec_render (spec->data.blend.background, widget, &bg);
-        meta_color_spec_render (spec->data.blend.foreground, widget, &fg);
+        meta_color_spec_render (spec->data.blend.background, style, &bg);
+        meta_color_spec_render (spec->data.blend.foreground, style, &fg);
 
         color_composite (&bg, &fg, spec->data.blend.alpha,
                          &spec->data.blend.color);
@@ -1469,7 +1625,7 @@ meta_color_spec_render (MetaColorSpec *spec,
 
     case META_COLOR_SPEC_SHADE:
       {
-        meta_color_spec_render (spec->data.shade.base, widget,
+        meta_color_spec_render (spec->data.shade.base, style,
                                 &spec->data.shade.color);
 
         gtk_style_shade (&spec->data.shade.color,
@@ -3215,7 +3371,11 @@ scale_and_alpha_pixbuf (GdkPixbuf             *src,
 
 static GdkPixbuf*
 draw_op_as_pixbuf (const MetaDrawOp    *op,
-                   GtkWidget           *widget,
+#if GTK_CHECK_VERSION (3, 0, 0)
+                   GtkStyleContext     *style,
+#else
+                   GtkStyle            *style,
+#endif
                    const MetaDrawInfo  *info,
                    int                  width,
                    int                  height)
@@ -3236,10 +3396,14 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
     case META_DRAW_RECTANGLE:
       if (op->data.rectangle.filled)
         {
+#if GTK_CHECK_VERSION (3, 0, 0)
+          GdkRGBA color;
+#else
           GdkColor color;
+#endif
 
           meta_color_spec_render (op->data.rectangle.color_spec,
-                                  widget,
+                                  style,
                                   &color);
 
           pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
@@ -3258,12 +3422,16 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
 
     case META_DRAW_TINT:
       {
+#if GTK_CHECK_VERSION (3, 0, 0)
+        GdkRGBA color;
+#else
         GdkColor color;
+#endif
         guint32 rgba;
         gboolean has_alpha;
 
         meta_color_spec_render (op->data.rectangle.color_spec,
-                                widget,
+                                style,
                                 &color);
 
         has_alpha =
@@ -3306,7 +3474,7 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
     case META_DRAW_GRADIENT:
       {
         pixbuf = meta_gradient_spec_render (op->data.gradient.gradient_spec,
-                                            widget, width, height);
+                                            style, width, height);
 
         pixbuf = apply_alpha (pixbuf,
                               op->data.gradient.alpha_spec,
@@ -3319,10 +3487,14 @@ draw_op_as_pixbuf (const MetaDrawOp    *op,
       {
 	if (op->data.image.colorize_spec)
 	  {
+#if GTK_CHECK_VERSION (3, 0, 0)
+	    GdkRGBA color;
+#else
 	    GdkColor color;
+#endif
 
             meta_color_spec_render (op->data.image.colorize_spec,
-                                    widget, &color);
+                                    style, &color);
 
             if (op->data.image.colorize_cache_pixbuf == NULL ||
                 op->data.image.colorize_cache_pixel != GDK_COLOR_RGB (color))
@@ -3430,31 +3602,6 @@ fill_env (MetaPositionExprEnv *env,
   env->theme = meta_current_theme;
 }
 
-#if GTK_CHECK_VERSION (3, 0, 0)
-static GtkStateFlags
-state_flags_from_gtk_state (GtkStateType state)
-{
-  switch (state)
-    {
-    case GTK_STATE_NORMAL:
-      return 0;
-    case GTK_STATE_PRELIGHT:
-      return GTK_STATE_FLAG_PRELIGHT;
-    case GTK_STATE_ACTIVE:
-      return GTK_STATE_FLAG_ACTIVE;
-    case GTK_STATE_SELECTED:
-      return GTK_STATE_FLAG_SELECTED;
-    case GTK_STATE_INSENSITIVE:
-      return GTK_STATE_FLAG_INSENSITIVE;
-    case GTK_STATE_INCONSISTENT:
-      return GTK_STATE_FLAG_INCONSISTENT;
-    case GTK_STATE_FOCUSED:
-      return GTK_STATE_FLAG_FOCUSED;
-    }
-  return 0;
-}
-#endif
-
 /* This code was originally rendering anti-aliased using X primitives, and
  * now has been switched to draw anti-aliased using cairo. In general, the
  * closest correspondence between X rendering and cairo rendering is given
@@ -3470,13 +3617,9 @@ static void
 meta_draw_op_draw_with_env (const MetaDrawOp    *op,
                             #if GTK_CHECK_VERSION(3, 0, 0)
                             GtkStyleContext     *style_gtk,
-                            #else
-                            GtkStyle            *style_gtk,
-                            #endif
-                            GtkWidget           *widget,
-                            #if GTK_CHECK_VERSION(3, 0, 0)
                             cairo_t             *cr,
                             #else
+                            GtkWidget           *widget,
                             GdkDrawable         *drawable,
                             const GdkRectangle  *clip,
                             #endif
@@ -3484,12 +3627,15 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
                             MetaRectangle        rect,
                             MetaPositionExprEnv *env)
 {
-  GdkColor color;
-
   #if GTK_CHECK_VERSION(3, 0, 0)
-  cairo_save(cr);
-  gtk_style_context_save(style_gtk);
+  GdkRGBA color;
+
+  cairo_save (cr);
+  gtk_style_context_save (style_gtk);
   #else
+  GdkColor color;
+  GtkStyle *style_gtk = gtk_widget_get_style (widget);
+
   cairo_t *cr;
   cr = gdk_cairo_create (drawable);
   #endif
@@ -3510,8 +3656,12 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
       {
         int x1, x2, y1, y2;
 
-        meta_color_spec_render (op->data.line.color_spec, widget, &color);
+        meta_color_spec_render (op->data.line.color_spec, style_gtk, &color);
+#if GTK_CHECK_VERSION (3, 0, 0)
+        gdk_cairo_set_source_rgba (cr, &color);
+#else
         gdk_cairo_set_source_color (cr, &color);
+#endif
 
         if (op->data.line.width > 0)
           cairo_set_line_width (cr, op->data.line.width);
@@ -3598,8 +3748,12 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
       {
         int rx, ry, rwidth, rheight;
 
-        meta_color_spec_render (op->data.rectangle.color_spec, widget, &color);
+        meta_color_spec_render (op->data.rectangle.color_spec, style_gtk, &color);
+#if GTK_CHECK_VERSION (3, 0, 0)
+        gdk_cairo_set_source_rgba (cr, &color);
+#else
         gdk_cairo_set_source_color (cr, &color);
+#endif
 
         rx = parse_x_position_unchecked (op->data.rectangle.x, env);
         ry = parse_y_position_unchecked (op->data.rectangle.y, env);
@@ -3628,8 +3782,12 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         double start_angle, end_angle;
         double center_x, center_y;
 
-        meta_color_spec_render (op->data.arc.color_spec, widget, &color);
+        meta_color_spec_render (op->data.arc.color_spec, style_gtk, &color);
+#if GTK_CHECK_VERSION (3, 0, 0)
+        gdk_cairo_set_source_rgba (cr, &color);
+#else
         gdk_cairo_set_source_color (cr, &color);
+#endif
 
         rx = parse_x_position_unchecked (op->data.arc.x, env);
         ry = parse_y_position_unchecked (op->data.arc.y, env);
@@ -3683,8 +3841,12 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
 
         if (!needs_alpha)
           {
-            meta_color_spec_render (op->data.tint.color_spec, widget, &color);
+            meta_color_spec_render (op->data.tint.color_spec, style_gtk, &color);
+#if GTK_CHECK_VERSION (3, 0, 0)
+            gdk_cairo_set_source_rgba (cr, &color);
+#else
             gdk_cairo_set_source_color (cr, &color);
+#endif
 
             cairo_rectangle (cr, rx, ry, rwidth, rheight);
             cairo_fill (cr);
@@ -3693,7 +3855,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
           {
             GdkPixbuf *pixbuf;
 
-            pixbuf = draw_op_as_pixbuf (op, widget, info,
+            pixbuf = draw_op_as_pixbuf (op, style_gtk, info,
                                         rwidth, rheight);
 
             if (pixbuf)
@@ -3717,7 +3879,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         rwidth = parse_size_unchecked (op->data.gradient.width, env);
         rheight = parse_size_unchecked (op->data.gradient.height, env);
 
-        pixbuf = draw_op_as_pixbuf (op, widget, info,
+        pixbuf = draw_op_as_pixbuf (op, style_gtk, info,
                                     rwidth, rheight);
 
         if (pixbuf)
@@ -3744,7 +3906,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         rwidth = parse_size_unchecked (op->data.image.width, env);
         rheight = parse_size_unchecked (op->data.image.height, env);
 
-        pixbuf = draw_op_as_pixbuf (op, widget, info,
+        pixbuf = draw_op_as_pixbuf (op, style_gtk, info,
                                     rwidth, rheight);
 
         if (pixbuf)
@@ -3791,8 +3953,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
             return;
           }
 
-        gtk_style_context_set_state (style_gtk,
-                                     state_flags_from_gtk_state (op->data.gtk_arrow.state));
+        gtk_style_context_set_state (style_gtk, op->data.gtk_arrow.state);
         gtk_render_arrow (style_gtk, cr, angle, rx, ry, size);
 
         #else
@@ -3821,8 +3982,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         rheight = parse_size_unchecked (op->data.gtk_box.height, env);
 
         #if GTK_CHECK_VERSION(3, 0, 0)
-        gtk_style_context_set_state (style_gtk,
-                                     state_flags_from_gtk_state (op->data.gtk_box.state));
+        gtk_style_context_set_state (style_gtk, op->data.gtk_box.state);
         gtk_render_background (style_gtk, cr, rx, ry, rwidth, rheight);
         gtk_render_frame (style_gtk, cr, rx, ry, rwidth, rheight);
         #else
@@ -3847,8 +4007,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         ry2 = parse_y_position_unchecked (op->data.gtk_vline.y2, env);
 
         #if GTK_CHECK_VERSION(3, 0, 0)
-        gtk_style_context_set_state (style_gtk,
-                                     state_flags_from_gtk_state (op->data.gtk_vline.state));
+        gtk_style_context_set_state (style_gtk, op->data.gtk_vline.state);
         gtk_render_line (style_gtk, cr, rx, ry1, rx, ry2);
         #else
         gtk_paint_vline (style_gtk,
@@ -3870,7 +4029,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         rwidth = parse_size_unchecked (op->data.icon.width, env);
         rheight = parse_size_unchecked (op->data.icon.height, env);
 
-        pixbuf = draw_op_as_pixbuf (op, widget, info,
+        pixbuf = draw_op_as_pixbuf (op, style_gtk, info,
                                     rwidth, rheight);
 
         if (pixbuf)
@@ -3891,8 +4050,12 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         {
           int rx, ry;
 
-          meta_color_spec_render (op->data.title.color_spec, widget, &color);
+          meta_color_spec_render (op->data.title.color_spec, style_gtk, &color);
+#if GTK_CHECK_VERSION (3, 0, 0)
+          gdk_cairo_set_source_rgba (cr, &color);
+#else
           gdk_cairo_set_source_color (cr, &color);
+#endif
 
           rx = parse_x_position_unchecked (op->data.title.x, env);
           ry = parse_y_position_unchecked (op->data.title.y, env);
@@ -3908,6 +4071,20 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
             cairo_pattern_t *linpat;
             linpat = cairo_pattern_create_linear (rx, ry, text_space,
                                                   env->title_height);
+#if GTK_CHECK_VERSION (3, 0, 0)
+            cairo_pattern_add_color_stop_rgba (linpat, 0, color.red,
+                                                          color.green,
+                                                          color.blue,
+                                                          color.alpha);
+            cairo_pattern_add_color_stop_rgba (linpat, startalpha,
+                                                       color.red,
+                                                       color.green,
+                                                       color.blue,
+                                                       color.alpha);
+            cairo_pattern_add_color_stop_rgba (linpat, 1, color.red,
+                                                          color.green,
+                                                          color.blue, 0);
+#else
             cairo_pattern_add_color_stop_rgb (linpat, 0, color.red/65535.0,
                                                          color.green/65535.0,
                                                          color.blue/65535.0);
@@ -3918,10 +4095,15 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
             cairo_pattern_add_color_stop_rgba (linpat, 1, color.red/65535.0,
                                                           color.green/65535.0,
                                                           color.blue/65535.0, 0);
+#endif
             cairo_set_source(cr, linpat);
             cairo_pattern_destroy(linpat);
           } else {
+#if GTK_CHECK_VERSION (3, 0, 0)
+            gdk_cairo_set_source_rgba (cr, &color);
+#else
             gdk_cairo_set_source_color (cr, &color);
+#endif
           }
 
           cairo_move_to (cr, rx, ry);
@@ -3939,10 +4121,11 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
         d_rect.height = parse_size_unchecked (op->data.op_list.height, env);
 
         meta_draw_op_list_draw_with_style (op->data.op_list.op_list,
-                                           style_gtk, widget,
                                            #if GTK_CHECK_VERSION(3, 0, 0)
+                                           style_gtk,
                                            cr,
                                            #else
+                                           widget,
                                            drawable, clip,
                                            #endif
                                            info, d_rect);
@@ -3986,7 +4169,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
             while (tile.y < (ry + rheight))
               {
                 meta_draw_op_list_draw_with_style (op->data.tile.op_list,
-                                                   style_gtk, widget, cr, info,
+                                                   style_gtk, cr, info,
                                                    tile);
 
                 tile.y += tile.height;
@@ -4023,7 +4206,11 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
                 while (tile.y < (ry + rheight))
                   {
                     meta_draw_op_list_draw_with_style (op->data.tile.op_list,
-                                                       style_gtk, widget, drawable, &new_clip, info,
+#if GTK_CHECK_VERSION (3, 0, 0)
+                                                       style_gtk, drawable, &new_clip, info,
+#else
+                                                       widget, drawable, &new_clip, info,
+#endif
                                                        tile);
 
                     tile.y += tile.height;
@@ -4047,11 +4234,11 @@ meta_draw_op_draw_with_env (const MetaDrawOp    *op,
 
 void
 meta_draw_op_draw_with_style (const MetaDrawOp    *op,
-                              GtkStyle            *style_gtk,
-                              GtkWidget           *widget,
                               #if GTK_CHECK_VERSION(3, 0, 0)
+                              GtkStyleContext     *style_gtk,
                               cairo_t             *cr,
                               #else
+                              GtkWidget           *widget,
                               GdkDrawable         *drawable,
                               const GdkRectangle  *clip,
                               #endif
@@ -4060,16 +4247,14 @@ meta_draw_op_draw_with_style (const MetaDrawOp    *op,
 {
   MetaPositionExprEnv env;
 
-  #if !GTK_CHECK_VERSION(3, 0, 0)
-  g_return_if_fail (style_gtk->colormap == gdk_drawable_get_colormap (drawable));
-  #endif
-
   fill_env (&env, info, logical_region);
 
-  meta_draw_op_draw_with_env (op, style_gtk, widget,
+  meta_draw_op_draw_with_env (op,
                               #if GTK_CHECK_VERSION(3, 0, 0)
+                              style_gtk,
                               cr,
                               #else
+                              widget,
                               drawable, clip,
                               #endif
                               info, logical_region,
@@ -4089,10 +4274,12 @@ meta_draw_op_draw (const MetaDrawOp    *op,
                    const MetaDrawInfo  *info,
                    MetaRectangle        logical_region)
 {
-  meta_draw_op_draw_with_style (op, gtk_widget_get_style (widget), widget,
+  meta_draw_op_draw_with_style (op,
                                 #if GTK_CHECK_VERSION(3, 0, 0)
+                                gtk_widget_get_style_context (widget),
                                 cr,
                                 #else
+                                widget,
                                 drawable, clip,
                                 #endif
                                 info, logical_region);
@@ -4147,11 +4334,11 @@ meta_draw_op_list_unref (MetaDrawOpList *op_list)
 
 void
 meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
-                                    GtkStyle             *style_gtk,
-                                    GtkWidget            *widget,
                                     #if GTK_CHECK_VERSION(3, 0, 0)
+                                    GtkStyleContext      *style_gtk,
                                     cairo_t              *cr,
                                     #else
+                                    GtkWidget            *widget,
                                     GdkDrawable          *drawable,
                                     const GdkRectangle   *clip,
                                     #endif
@@ -4167,10 +4354,6 @@ meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
   #endif
   MetaPositionExprEnv env;
 
-  #if !GTK_CHECK_VERSION(3, 0, 0)
-  g_return_if_fail (style_gtk->colormap == gdk_drawable_get_colormap (drawable));
-  #endif
-
   if (op_list->n_ops == 0)
     return;
 
@@ -4189,7 +4372,7 @@ meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
    */
 
   #if GTK_CHECK_VERSION(3, 0, 0)
-  cairo_save(cr);
+  cairo_save (cr);
   #else
   if (clip)
     {
@@ -4226,10 +4409,7 @@ meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
         }
       else if (gdk_cairo_get_clip_rectangle (cr, NULL))
         {
-          meta_draw_op_draw_with_env (op,
-                                      style_gtk, widget, cr, info,
-                                      rect,
-                                      &env);
+          meta_draw_op_draw_with_env (op, style_gtk, cr, info, rect, &env);
         }
 
       #else
@@ -4247,7 +4427,7 @@ meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
                active_clip.height > 0)
         {
           meta_draw_op_draw_with_env (op,
-                                      style_gtk, widget, drawable, &active_clip, info,
+                                      widget, drawable, &active_clip, info,
                                       rect,
                                       &env);
         }
@@ -4255,7 +4435,7 @@ meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
     }
 
     #if GTK_CHECK_VERSION(3, 0, 0)
-    cairo_restore(cr);
+    cairo_restore (cr);
     #endif
 }
 
@@ -4272,10 +4452,12 @@ meta_draw_op_list_draw  (const MetaDrawOpList *op_list,
                          MetaRectangle         rect)
 
 {
-  meta_draw_op_list_draw_with_style (op_list, gtk_widget_get_style (widget), widget,
+  meta_draw_op_list_draw_with_style (op_list,
                                      #if GTK_CHECK_VERSION(3, 0, 0)
+                                     gtk_widget_get_style_context (widget),
                                      cr,
                                      #else
+                                     widget,
                                      drawable, clip,
                                      #endif
                                      info, rect);
@@ -4644,13 +4826,9 @@ void
 meta_frame_style_draw_with_style (MetaFrameStyle          *style,
                                   #if GTK_CHECK_VERSION(3, 0, 0)
                                   GtkStyleContext         *style_gtk,
-                                  #else
-                                  GtkStyle                *style_gtk,
-                                  #endif
-                                  GtkWidget               *widget,
-                                  #if GTK_CHECK_VERSION(3, 0, 0)
                                   cairo_t                 *cr,
                                   #else
+                                  GtkWidget               *widget,
                                   GdkDrawable             *drawable,
                                   int                      x_offset,
                                   int                      y_offset,
@@ -4676,10 +4854,6 @@ meta_frame_style_draw_with_style (MetaFrameStyle          *style,
   PangoRectangle extents;
   MetaDrawInfo draw_info;
 
-  #if !GTK_CHECK_VERSION(3, 0, 0)
-  g_return_if_fail (style_gtk->colormap == gdk_drawable_get_colormap (drawable));
-  #endif
-
   titlebar_rect.x = 0;
   titlebar_rect.y = 0;
   titlebar_rect.width = fgeom->width;
@@ -4831,7 +5005,6 @@ meta_frame_style_draw_with_style (MetaFrameStyle          *style,
               m_rect = meta_rect (rect.x, rect.y, rect.width, rect.height);
               meta_draw_op_list_draw_with_style (op_list,
                                                  style_gtk,
-                                                 widget,
                                                  cr,
                                                  &draw_info,
                                                  m_rect);
@@ -4870,7 +5043,6 @@ meta_frame_style_draw_with_style (MetaFrameStyle          *style,
               MetaRectangle m_rect;
               m_rect = meta_rect (rect.x, rect.y, rect.width, rect.height);
               meta_draw_op_list_draw_with_style (op_list,
-                                                 style_gtk,
                                                  widget,
                                                  drawable,
                                                  &combined_clip,
@@ -4916,7 +5088,6 @@ meta_frame_style_draw_with_style (MetaFrameStyle          *style,
 
                       meta_draw_op_list_draw_with_style (op_list,
                                                          style_gtk,
-                                                         widget,
                                                          cr,
                                                          &draw_info,
                                                          m_rect);
@@ -4978,7 +5149,6 @@ meta_frame_style_draw_with_style (MetaFrameStyle          *style,
                       m_rect = meta_rect (rect.x, rect.y,
                                           rect.width, rect.height);
                       meta_draw_op_list_draw_with_style (op_list,
-                                                         style_gtk,
                                                          widget,
                                                          drawable,
                                                          &combined_clip,
@@ -5031,13 +5201,9 @@ meta_frame_style_draw (MetaFrameStyle          *style,
   meta_frame_style_draw_with_style (style,
                                     #if GTK_CHECK_VERSION(3, 0, 0)
                                     gtk_widget_get_style_context (widget),
-                                    #else
-                                    gtk_widget_get_style (widget),
-                                    #endif
-                                    widget,
-                                    #if GTK_CHECK_VERSION(3, 0, 0)
                                     cr,
                                     #else
+                                    widget,
                                     drawable, x_offset, y_offset, clip,
                                     #endif
                                     fgeom, client_width, client_height,
@@ -5636,13 +5802,9 @@ void
 meta_theme_draw_frame_with_style (MetaTheme              *theme,
                                   #if GTK_CHECK_VERSION(3, 0, 0)
                                   GtkStyleContext        *style_gtk,
-                                  #else
-                                  GtkStyle               *style_gtk,
-                                  #endif
-                                  GtkWidget              *widget,
-                                  #if GTK_CHECK_VERSION(3, 0, 0)
                                   cairo_t                *cr,
                                   #else
+                                  GtkWidget              *widget,
                                   GdkDrawable            *drawable,
                                   const GdkRectangle     *clip,
                                   int                     x_offset,
@@ -5679,11 +5841,11 @@ meta_theme_draw_frame_with_style (MetaTheme              *theme,
                                    theme);
 
   meta_frame_style_draw_with_style (style,
-                                    style_gtk,
-                                    widget,
                                     #if GTK_CHECK_VERSION(3, 0, 0)
+                                    style_gtk,
                                     cr,
                                     #else
+                                    widget,
                                     drawable, x_offset, y_offset, clip,
                                     #endif
                                     &fgeom,
@@ -5719,13 +5881,9 @@ meta_theme_draw_frame (MetaTheme              *theme,
   meta_theme_draw_frame_with_style (theme,
                                     #if GTK_CHECK_VERSION(3, 0, 0)
                                     gtk_widget_get_style_context (widget),
-                                    #else
-                                    gtk_widget_get_style (widget),
-                                    #endif
-                                    widget,
-                                    #if GTK_CHECK_VERSION(3, 0, 0)
                                     cr,
                                     #else
+                                    widget,
                                     drawable, clip, x_offset, y_offset,
                                     #endif
                                     type, flags, client_width, client_height,
@@ -6128,7 +6286,14 @@ meta_gtk_widget_get_font_desc (GtkWidget *widget,
 
   g_return_val_if_fail (gtk_widget_get_realized (widget), NULL);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GtkStyleContext *style = gtk_widget_get_style_context (widget);
+  GtkStateFlags state = gtk_widget_get_state_flags (widget);
+  gtk_style_context_get(style, state, GTK_STYLE_PROPERTY_FONT, &font_desc, NULL);
+  font_desc = pango_font_description_copy (font_desc);
+#else
   font_desc = pango_font_description_copy (gtk_widget_get_style (widget)->font_desc);
+#endif
 
   if (override)
     pango_font_description_merge (font_desc, override, TRUE);
@@ -6596,6 +6761,30 @@ meta_gradient_type_to_string (MetaGradientType type)
   return "<unknown>";
 }
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+GtkStateFlags
+meta_gtk_state_from_string (const char *str)
+{
+  if (g_ascii_strcasecmp ("normal", str) == 0)
+    return GTK_STATE_FLAG_NORMAL;
+  else if (g_ascii_strcasecmp ("prelight", str) == 0)
+    return GTK_STATE_FLAG_PRELIGHT;
+  else if (g_ascii_strcasecmp ("active", str) == 0)
+    return GTK_STATE_FLAG_ACTIVE;
+  else if (g_ascii_strcasecmp ("selected", str) == 0)
+    return GTK_STATE_FLAG_SELECTED;
+  else if (g_ascii_strcasecmp ("insensitive", str) == 0)
+    return GTK_STATE_FLAG_INSENSITIVE;
+  else if (g_ascii_strcasecmp ("inconsistent", str) == 0)
+    return GTK_STATE_FLAG_INCONSISTENT;
+  else if (g_ascii_strcasecmp ("focused", str) == 0)
+    return GTK_STATE_FLAG_FOCUSED;
+  else if (g_ascii_strcasecmp ("backdrop", str) == 0)
+    return GTK_STATE_FLAG_BACKDROP;
+  else
+    return -1; /* hack */
+}
+#else
 GtkStateType
 meta_gtk_state_from_string (const char *str)
 {
@@ -6632,6 +6821,7 @@ meta_gtk_state_to_string (GtkStateType state)
 
   return "<unknown>";
 }
+#endif
 
 GtkShadowType
 meta_gtk_shadow_from_string (const char *str)
@@ -6755,18 +6945,31 @@ meta_image_fill_type_to_string (MetaImageFillType fill_type)
  * \param b  [out] the resulting colour
  * \param k  amount to scale lightness and saturation by
  */
+#if GTK_CHECK_VERSION (3, 0, 0)
+static void
+gtk_style_shade (GdkRGBA *a,
+                 GdkRGBA *b,
+                 gdouble  k)
+#else
 static void
 gtk_style_shade (GdkColor *a,
                  GdkColor *b,
                  gdouble   k)
+#endif
 {
   gdouble red;
   gdouble green;
   gdouble blue;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  red = a->red;
+  green = a->green;
+  blue = a->blue;
+#else
   red = (gdouble) a->red / 65535.0;
   green = (gdouble) a->green / 65535.0;
   blue = (gdouble) a->blue / 65535.0;
+#endif
 
   rgb_to_hls (&red, &green, &blue);
 
@@ -6784,9 +6987,15 @@ gtk_style_shade (GdkColor *a,
 
   hls_to_rgb (&red, &green, &blue);
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  b->red = red;
+  b->green = green;
+  b->blue = blue;
+#else
   b->red = red * 65535.0;
   b->green = green * 65535.0;
   b->blue = blue * 65535.0;
+#endif
 }
 
 /**
diff --git a/src/ui/theme.h b/src/ui/theme.h
index a4ddb5f6..66996d89 100644
--- a/src/ui/theme.h
+++ b/src/ui/theme.h
@@ -255,24 +255,40 @@ struct _MetaColorSpec
   union
   {
     struct {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA color;
+#else
       GdkColor color;
+#endif
     } basic;
     struct {
       MetaGtkColorComponent component;
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GtkStateFlags state;
+#else
       GtkStateType state;
+#endif
     } gtk;
     struct {
       MetaColorSpec *foreground;
       MetaColorSpec *background;
       double alpha;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA color;
+#else
       GdkColor color;
+#endif
     } blend;
     struct {
       MetaColorSpec *base;
       double factor;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA color;
+#else
       GdkColor color;
+#endif
     } shade;
   } data;
 };
@@ -501,7 +517,11 @@ struct _MetaDrawOp
     } image;
 
     struct {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GtkStateFlags state;
+#else
       GtkStateType state;
+#endif
       GtkShadowType shadow;
       GtkArrowType arrow;
       gboolean filled;
@@ -513,7 +533,11 @@ struct _MetaDrawOp
     } gtk_arrow;
 
     struct {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GtkStateFlags state;
+#else
       GtkStateType state;
+#endif
       GtkShadowType shadow;
       MetaDrawSpec *x;
       MetaDrawSpec *y;
@@ -522,7 +546,11 @@ struct _MetaDrawOp
     } gtk_box;
 
     struct {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GtkStateFlags state;
+#else
       GtkStateType state;
+#endif
       MetaDrawSpec *x;
       MetaDrawSpec *y1;
       MetaDrawSpec *y2;
@@ -898,12 +926,23 @@ void          meta_draw_spec_free (MetaDrawSpec *spec);
 MetaColorSpec* meta_color_spec_new             (MetaColorSpecType  type);
 MetaColorSpec* meta_color_spec_new_from_string (const char        *str,
                                                 GError           **err);
+#if GTK_CHECK_VERSION (3, 0, 0)
+MetaColorSpec* meta_color_spec_new_gtk         (MetaGtkColorComponent component,
+                                                GtkStateFlags         state);
+#else
 MetaColorSpec* meta_color_spec_new_gtk         (MetaGtkColorComponent component,
                                                 GtkStateType          state);
+#endif
 void           meta_color_spec_free            (MetaColorSpec     *spec);
+#if GTK_CHECK_VERSION (3, 0, 0)
+void           meta_color_spec_render          (MetaColorSpec     *spec,
+                                                GtkStyleContext   *style_gtk,
+                                                GdkRGBA           *color);
+#else
 void           meta_color_spec_render          (MetaColorSpec     *spec,
-                                                GtkWidget         *widget,
+                                                GtkStyle          *style_gtk,
                                                 GdkColor          *color);
+#endif
 
 
 MetaDrawOp*    meta_draw_op_new  (MetaDrawType        type);
@@ -921,11 +960,11 @@ void           meta_draw_op_draw (const MetaDrawOp    *op,
                                   MetaRectangle        logical_region);
 
 void           meta_draw_op_draw_with_style (const MetaDrawOp    *op,
-                                             GtkStyle            *style_gtk,
-                                             GtkWidget           *widget,
                                              #if GTK_CHECK_VERSION(3, 0, 0)
+                                             GtkStyleContext     *style_gtk,
                                              cairo_t             *cr,
                                              #else
+                                             GtkWidget           *widget,
                                              GdkDrawable         *drawable,
                                              const GdkRectangle  *clip,
                                              #endif
@@ -947,11 +986,11 @@ void            meta_draw_op_list_draw  (const MetaDrawOpList *op_list,
                                          const MetaDrawInfo   *info,
                                          MetaRectangle         rect);
 void            meta_draw_op_list_draw_with_style  (const MetaDrawOpList *op_list,
-                                                    GtkStyle             *style_gtk,
-                                                    GtkWidget            *widget,
                                                     #if GTK_CHECK_VERSION(3, 0, 0)
+                                                    GtkStyleContext      *style_gtk,
                                                     cairo_t              *cr,
                                                     #else
+                                                    GtkWidget            *widget,
                                                     GdkDrawable          *drawable,
                                                     const GdkRectangle   *clip,
                                                     #endif
@@ -966,10 +1005,17 @@ gboolean       meta_draw_op_list_contains (MetaDrawOpList    *op_list,
 
 MetaGradientSpec* meta_gradient_spec_new    (MetaGradientType        type);
 void              meta_gradient_spec_free   (MetaGradientSpec       *desc);
+#if GTK_CHECK_VERSION (3, 0, 0)
 GdkPixbuf*        meta_gradient_spec_render (const MetaGradientSpec *desc,
-                                             GtkWidget              *widget,
+                                             GtkStyleContext        *style_gtk,
                                              int                     width,
                                              int                     height);
+#else
+GdkPixbuf*        meta_gradient_spec_render (const MetaGradientSpec *desc,
+                                             GtkStyle               *style_gtk,
+                                             int                     width,
+                                             int                     height);
+#endif
 gboolean          meta_gradient_spec_validate (MetaGradientSpec     *spec,
                                                GError              **error);
 
@@ -1005,13 +1051,9 @@ void meta_frame_style_draw (MetaFrameStyle          *style,
 void meta_frame_style_draw_with_style (MetaFrameStyle          *style,
                                        #if GTK_CHECK_VERSION(3, 0, 0)
                                        GtkStyleContext         *style_gtk,
-                                       #else
-                                       GtkStyle                *style_gtk,
-                                       #endif
-                                       GtkWidget               *widget,
-                                       #if GTK_CHECK_VERSION(3, 0, 0)
                                        cairo_t                 *cr,
                                        #else
+                                       GtkWidget               *widget,
                                        GdkDrawable             *drawable,
                                        int                      x_offset,
                                        int                      y_offset,
@@ -1104,13 +1146,9 @@ void meta_theme_draw_frame_by_name (MetaTheme              *theme,
 void meta_theme_draw_frame_with_style (MetaTheme              *theme,
                                        #if GTK_CHECK_VERSION(3, 0, 0)
                                        GtkStyleContext        *style_gtk,
-                                       #else
-                                       GtkStyle               *style_gtk,
-                                       #endif
-                                       GtkWidget              *widget,
-                                       #if GTK_CHECK_VERSION(3, 0, 0)
                                        cairo_t                *cr,
                                        #else
+                                       GtkWidget              *widget,
                                        GdkDrawable            *drawable,
                                        const GdkRectangle     *clip,
                                        int                     x_offset,
@@ -1221,8 +1259,12 @@ MetaFrameType         meta_frame_type_from_string      (const char            *s
 const char*           meta_frame_type_to_string        (MetaFrameType          type);
 MetaGradientType      meta_gradient_type_from_string   (const char            *str);
 const char*           meta_gradient_type_to_string     (MetaGradientType       type);
+#if GTK_CHECK_VERSION (3, 0, 0)
+GtkStateFlags         meta_gtk_state_from_string       (const char            *str);
+#else
 GtkStateType          meta_gtk_state_from_string       (const char            *str);
 const char*           meta_gtk_state_to_string         (GtkStateType           state);
+#endif
 GtkShadowType         meta_gtk_shadow_from_string      (const char            *str);
 const char*           meta_gtk_shadow_to_string        (GtkShadowType          shadow);
 GtkArrowType          meta_gtk_arrow_from_string       (const char            *str);
diff --git a/src/ui/tile-preview.c b/src/ui/tile-preview.c
index d5a68846..71b2e297 100644
--- a/src/ui/tile-preview.c
+++ b/src/ui/tile-preview.c
@@ -35,8 +35,12 @@
 struct _MetaTilePreview {
   GtkWidget     *preview_window;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GdkRGBA       *preview_color;
+#else
   GdkColor      *preview_color;
   guchar         preview_alpha;
+#endif
 
   MetaRectangle  tile_rect;
 
@@ -45,13 +49,14 @@ struct _MetaTilePreview {
 
 static gboolean
 #if GTK_CHECK_VERSION (3, 0, 0)
-meta_tile_preview_draw   (GtkWidget      *widget,
-                          cairo_t        *cr,
+meta_tile_preview_draw (GtkWidget *widget,
+                        cairo_t   *cr,
+                        gpointer   user_data)
 #else
 meta_tile_preview_expose (GtkWidget      *widget,
                           GdkEventExpose *event,
-#endif
                           gpointer        user_data)
+#endif
 {
   MetaTilePreview *preview = user_data;
 #if !GTK_CHECK_VERSION (3, 0, 0)
@@ -66,25 +71,42 @@ meta_tile_preview_expose (GtkWidget      *widget,
 
   if (preview->has_alpha)
     {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA preview_color = *preview->preview_color;
+#endif
 
       /* Fill the preview area with a transparent color */
+#if GTK_CHECK_VERSION (3, 0, 0)
+      gdk_cairo_set_source_rgba (cr, &preview_color);
+#else
       cairo_set_source_rgba (cr,
                              (double)preview->preview_color->red   / 0xFFFF,
                              (double)preview->preview_color->green / 0xFFFF,
                              (double)preview->preview_color->blue  / 0xFFFF,
                              (double)preview->preview_alpha / 0xFF);
+#endif
 
       cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
       cairo_paint (cr);
 
       /* Use the opaque color for the border */
+#if GTK_CHECK_VERSION (3, 0, 0)
+      gdk_cairo_set_source_rgba (cr, &preview_color);
+#else
       gdk_cairo_set_source_color (cr, preview->preview_color);
+#endif
     }
   else
     {
+#if GTK_CHECK_VERSION (3, 0, 0)
+      GdkRGBA white = {1.0, 1.0, 1.0, 1.0};
+
+      gdk_cairo_set_source_rgba (cr, &white);
+#else
       GtkStyle *style = gtk_widget_get_style (preview->preview_window);
 
       gdk_cairo_set_source_color (cr, &style->white);
+#endif
 
       cairo_rectangle (cr,
                        OUTLINE_WIDTH - 0.5, OUTLINE_WIDTH - 0.5,
@@ -112,6 +134,22 @@ on_preview_window_style_set (GtkWidget *widget,
                              gpointer   user_data)
 {
   MetaTilePreview *preview = user_data;
+#if GTK_CHECK_VERSION (3, 0, 0)
+  GtkStyleContext *context = gtk_style_context_new ();
+  GtkWidgetPath *path = gtk_widget_path_new ();
+  guchar alpha = 0xFF;
+
+  gtk_widget_path_append_type (path, GTK_TYPE_ICON_VIEW);
+  gtk_style_context_set_path (context, path);
+
+  gtk_style_context_get (context, GTK_STATE_FLAG_SELECTED, "background-color", &preview->preview_color, NULL);
+  gtk_style_context_get_style (context, "selection-box-alpha", &alpha, NULL);
+
+  preview->preview_color->alpha = (double)alpha / 0xFF;
+
+  gtk_widget_path_free (path);
+  g_object_unref (context);
+#else
   GtkStyle *style;
 
   style = gtk_rc_get_style_by_paths (gtk_widget_get_settings (widget),
@@ -135,6 +173,7 @@ on_preview_window_style_set (GtkWidget *widget,
     }
 
   g_object_unref (style);
+#endif
 }
 
 MetaTilePreview *
@@ -160,7 +199,9 @@ meta_tile_preview_new (int      screen_number,
   gtk_widget_set_app_paintable (preview->preview_window, TRUE);
 
   preview->preview_color = NULL;
+#if !GTK_CHECK_VERSION (3, 0, 0)
   preview->preview_alpha = 0xFF;
+#endif
 
   preview->tile_rect.x = preview->tile_rect.y = 0;
   preview->tile_rect.width = preview->tile_rect.height = 0;
@@ -207,7 +248,11 @@ meta_tile_preview_free (MetaTilePreview *preview)
   gtk_widget_destroy (preview->preview_window);
 
   if (preview->preview_color)
+#if GTK_CHECK_VERSION (3, 0, 0)
+    gdk_rgba_free (preview->preview_color);
+#else
     gdk_color_free (preview->preview_color);
+#endif
 
   g_free (preview);
 }
@@ -250,12 +295,20 @@ meta_tile_preview_show (MetaTilePreview *preview,
 
   if (!preview->has_alpha)
     {
-      GdkRectangle outer_rect, inner_rect;
+#if GTK_CHECK_VERSION (3, 0, 0)
+      cairo_rectangle_int_t outer_rect, inner_rect;
       cairo_region_t *outer_region, *inner_region;
+      GdkRGBA black = {.0, .0, .0, 1.0};
+
+      gdk_window_set_background_rgba (window, &black);
+#else
+      GdkRectangle outer_rect, inner_rect;
+      GdkRegion *outer_region, *inner_region;
       GdkColor black;
 
       black = gtk_widget_get_style (preview->preview_window)->black;
       gdk_window_set_background (window, &black);
+#endif
 
       outer_rect.x = outer_rect.y = 0;
       outer_rect.width = preview->tile_rect.width;
@@ -266,14 +319,25 @@ meta_tile_preview_show (MetaTilePreview *preview,
       inner_rect.width = outer_rect.width - 2 * OUTLINE_WIDTH;
       inner_rect.height = outer_rect.height - 2 * OUTLINE_WIDTH;
 
+#if GTK_CHECK_VERSION (3, 0, 0)
       outer_region = cairo_region_create_rectangle (&outer_rect);
       inner_region = cairo_region_create_rectangle (&inner_rect);
 
       cairo_region_subtract (outer_region, inner_region);
       cairo_region_destroy (inner_region);
 
-      gdk_window_shape_combine_region (window, outer_region, 0, 0);
+      gtk_widget_shape_combine_region (preview->preview_window, outer_region);
       cairo_region_destroy (outer_region);
+#else
+      outer_region = gdk_region_rectangle (&outer_rect);
+      inner_region = gdk_region_rectangle (&inner_rect);
+
+      gdk_region_subtract (outer_region, inner_region);
+      gdk_region_destroy (inner_region);
+
+      gdk_window_shape_combine_region (window, outer_region, 0, 0);
+      gdk_region_destroy (outer_region);
+#endif
     }
 }
 
diff --git a/src/ui/ui.c b/src/ui/ui.c
index b187f8cb..226e3c24 100644
--- a/src/ui/ui.c
+++ b/src/ui/ui.c
@@ -134,8 +134,8 @@ maybe_redirect_mouse_event (XEvent *xevent)
     return FALSE;
 
 #if GTK_CHECK_VERSION (3, 0, 0)
- gmanager = gdk_display_get_device_manager (gdisplay);
- gdevice = gdk_device_manager_get_client_pointer (gmanager);
+  gmanager = gdk_display_get_device_manager (gdisplay);
+  gdevice = gdk_device_manager_get_client_pointer (gmanager);
 #endif
 
   /* If GDK already thinks it has a grab, we better let it see events; this
@@ -256,6 +256,7 @@ maybe_redirect_mouse_event (XEvent *xevent)
   /* If we've gotten here, we've filled in the gdk_event and should send it on */
 #if GTK_CHECK_VERSION (3, 0, 0)
   gdk_event_set_device (gevent, gdevice);
+  gtk_main_do_event (gevent);
   gdk_event_free (gevent);
 #else
   gtk_main_do_event (&gevent);
@@ -978,7 +979,6 @@ meta_ui_theme_get_frame_borders (MetaUI *ui,
 #endif
   PangoContext *context;
   const PangoFontDescription *font_desc;
-  GtkStyle *default_style;
 
   if (meta_ui_have_a_theme ())
     {
@@ -1002,6 +1002,8 @@ meta_ui_theme_get_frame_borders (MetaUI *ui,
           gtk_style_context_get (style, GTK_STATE_FLAG_NORMAL, "font", &free_font_desc, NULL);
           font_desc = (const PangoFontDescription *) free_font_desc;
 #else
+          GtkStyle *default_style;
+
           default_style = gtk_widget_get_default_style ();
           font_desc = default_style->font_desc;
 #endif