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|
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* Mutter tile-preview marks the area a window will *ehm* snap to */
/*
* Copyright (C) 2010 Florian Müllner
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <config.h>
#include <gtk/gtk.h>
#include <cairo.h>
#include "tile-preview.h"
#include "core.h"
#include "types.h"
#include "core/screen-private.h"
#define OUTLINE_WIDTH 5 /* frame width in non-composite case */
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;
gboolean has_alpha: 1;
};
static gboolean
#if GTK_CHECK_VERSION (3, 0, 0)
meta_tile_preview_draw (GtkWidget *widget,
cairo_t *cr,
gpointer user_data)
#else
meta_tile_preview_expose (GtkWidget *widget,
GdkEventExpose *event,
gpointer user_data)
#endif
{
MetaTilePreview *preview = user_data;
#if !GTK_CHECK_VERSION (3, 0, 0)
GdkWindow *window;
cairo_t *cr;
window = gtk_widget_get_window (widget);
cr = gdk_cairo_create (window);
#endif
cairo_set_line_width (cr, 1.0);
if (preview->has_alpha)
{
/* Fill the preview area with a transparent color */
#if GTK_CHECK_VERSION (3, 0, 0)
gdk_cairo_set_source_rgba (cr, preview->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->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,
preview->tile_rect.width - 2 * (OUTLINE_WIDTH - 1) - 1,
preview->tile_rect.height - 2 * (OUTLINE_WIDTH - 1) - 1);
cairo_stroke (cr);
}
cairo_rectangle (cr,
0.5, 0.5,
preview->tile_rect.width - 1,
preview->tile_rect.height - 1);
#if GTK_CHECK_VERSION (3, 0, 0)
if (preview->has_alpha) {
cairo_fill_preserve (cr);
cairo_set_source_rgba (cr, preview->preview_color->red, preview->preview_color->green, preview->preview_color->blue, 1.0);
}
#endif
cairo_stroke (cr);
#if !GTK_CHECK_VERSION (3, 0, 0)
cairo_destroy (cr);
#endif
return FALSE;
}
static void
on_preview_window_style_set (GtkWidget *widget,
GtkStyle *previous,
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),
"GtkWindow.GtkIconView",
"GtkWindow.GtkIconView",
GTK_TYPE_ICON_VIEW);
if (style != NULL)
g_object_ref (style);
else
style = gtk_style_new ();
gtk_style_get (style, GTK_TYPE_ICON_VIEW,
"selection-box-color", &preview->preview_color,
"selection-box-alpha", &preview->preview_alpha,
NULL);
if (!preview->preview_color)
{
GdkColor selection = style->base[GTK_STATE_SELECTED];
preview->preview_color = gdk_color_copy (&selection);
}
g_object_unref (style);
#endif
}
MetaTilePreview *
meta_tile_preview_new (int screen_number)
{
MetaTilePreview *preview;
#if !GTK_CHECK_VERSION (3, 0, 0)
GdkColormap *rgba_colormap;
#endif
GdkScreen *screen;
screen = gdk_display_get_screen (gdk_display_get_default (), screen_number);
#if !GTK_CHECK_VERSION (3, 0, 0)
rgba_colormap = gdk_screen_get_rgba_colormap (screen);
#endif
preview = g_new (MetaTilePreview, 1);
preview->preview_window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_screen (GTK_WINDOW (preview->preview_window), screen);
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;
#if GTK_CHECK_VERSION (3, 0, 0)
gtk_widget_set_visual (preview->preview_window,
gdk_screen_get_rgba_visual (screen));
#else
gtk_widget_set_colormap (preview->preview_window, rgba_colormap);
#endif
g_signal_connect (preview->preview_window, "style-set",
G_CALLBACK (on_preview_window_style_set), preview);
gtk_widget_realize (preview->preview_window);
#if !GTK_CHECK_VERSION (3, 0, 0)
gdk_window_set_back_pixmap (gtk_widget_get_window (preview->preview_window),
NULL, FALSE);
#endif
#if GTK_CHECK_VERSION (3, 0, 0)
g_signal_connect (preview->preview_window, "draw",
G_CALLBACK (meta_tile_preview_draw), preview);
#else
g_signal_connect (preview->preview_window, "expose-event",
G_CALLBACK (meta_tile_preview_expose), preview);
#endif
return preview;
}
void
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);
}
void
meta_tile_preview_show (MetaTilePreview *preview,
MetaRectangle *tile_rect,
MetaScreen *screen)
{
GdkWindow *window;
GdkRectangle old_rect;
if (gtk_widget_get_visible (preview->preview_window)
&& preview->tile_rect.x == tile_rect->x
&& preview->tile_rect.y == tile_rect->y
&& preview->tile_rect.width == tile_rect->width
&& preview->tile_rect.height == tile_rect->height)
return; /* nothing to do */
window = gtk_widget_get_window (preview->preview_window);
#if GTK_CHECK_VERSION (3, 0, 0)
meta_core_lower_beneath_focus_window (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()),
#else
meta_core_lower_beneath_focus_window (gdk_display,
#endif
GDK_WINDOW_XID (window),
gtk_get_current_event_time ());
old_rect.x = old_rect.y = 0;
old_rect.width = preview->tile_rect.width;
old_rect.height = preview->tile_rect.height;
gdk_window_invalidate_rect (window, &old_rect, FALSE);
gtk_widget_show (preview->preview_window);
preview->tile_rect = *tile_rect;
gdk_window_move_resize (window,
preview->tile_rect.x, preview->tile_rect.y,
preview->tile_rect.width, preview->tile_rect.height);
#if HAVE_COMPOSITE_EXTENSIONS
preview->has_alpha = meta_screen_is_cm_selected (screen);
#else
preview->has_alpha = FALSE;
#endif
if (!preview->has_alpha)
{
#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;
outer_rect.height = preview->tile_rect.height;
inner_rect.x = OUTLINE_WIDTH;
inner_rect.y = OUTLINE_WIDTH;
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);
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
} else {
gdk_window_shape_combine_region (window, NULL, 0, 0);
}
}
void
meta_tile_preview_hide (MetaTilePreview *preview)
{
gtk_widget_hide (preview->preview_window);
}
|
