/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- eel-background.c: Object for the background of a widget. Copyright (C) 2000 Eazel, Inc. Copyright (C) 2012 Jasmine Hassan <jasmine.aura@gmail.com> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Library 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. Authors: Darin Adler <darin@eazel.com> Jasmine Hassan <jasmine.aura@gmail.com> */ #include <config.h> #include "eel-background.h" #include "eel-gdk-extensions.h" #include "eel-glib-extensions.h" #include "eel-lib-self-check-functions.h" #include <gtk/gtk.h> #include <eel/eel-canvas.h> #include <eel/eel-canvas-util.h> #if GTK_CHECK_VERSION (3, 0, 0) # include <cairo-xlib.h> #endif #include <gdk/gdkx.h> #include <gio/gio.h> #include <math.h> #include <stdio.h> #define MATE_DESKTOP_USE_UNSTABLE_API #include <libmate-desktop/mate-bg.h> #include <libcaja-private/caja-global-preferences.h> #if !GTK_CHECK_VERSION(3, 0, 0) #define cairo_surface_t GdkPixmap #define cairo_surface_destroy g_object_unref #define cairo_xlib_surface_get_display GDK_PIXMAP_XDISPLAY #define cairo_xlib_surface_get_drawable GDK_PIXMAP_XID #define cairo_set_source_surface gdk_cairo_set_source_pixmap #define mate_bg_create_surface mate_bg_create_pixmap #define mate_bg_set_surface_as_root mate_bg_set_pixmap_as_root #define mate_bg_get_surface_from_root mate_bg_get_pixmap_from_root #define mate_bg_crossfade_set_start_surface mate_bg_crossfade_set_start_pixmap #define mate_bg_crossfade_set_end_surface mate_bg_crossfade_set_end_pixmap #endif G_DEFINE_TYPE (EelBackground, eel_background, G_TYPE_OBJECT); enum { APPEARANCE_CHANGED, SETTINGS_CHANGED, RESET, LAST_SIGNAL }; static guint signals[LAST_SIGNAL] = { 0 }; struct EelBackgroundDetails { GtkWidget *widget; MateBG *bg; char *color; /* Realized data: */ cairo_surface_t *bg_surface; gboolean unset_root_surface; MateBGCrossfade *fade; int bg_entire_width; int bg_entire_height; #if GTK_CHECK_VERSION (3, 0, 0) GdkRGBA default_color; #else GdkColor default_color; #endif gboolean use_base; /* Is this background attached to desktop window */ gboolean is_desktop; /* Desktop screen size watcher */ gulong screen_size_handler; /* Desktop monitors configuration watcher */ gulong screen_monitors_handler; /* Can we use common surface for root window and desktop window */ gboolean use_common_surface; guint change_idle_id; /* activity status */ gboolean is_active; }; static void free_fade (EelBackground *self) { if (self->details->fade != NULL) { g_object_unref (self->details->fade); self->details->fade = NULL; } } static void free_background_surface (EelBackground *self) { cairo_surface_t *surface; surface = self->details->bg_surface; if (surface != NULL) { /* If we created a root surface and didn't set it as background it will live forever, so we need to kill it manually. If set as root background it will be killed next time the background is changed. */ if (self->details->unset_root_surface) { XKillClient (cairo_xlib_surface_get_display (surface), cairo_xlib_surface_get_drawable (surface)); } cairo_surface_destroy (surface); self->details->bg_surface = NULL; } } static void eel_background_finalize (GObject *object) { EelBackground *self = EEL_BACKGROUND (object); g_free (self->details->color); if (self->details->bg != NULL) { g_object_unref (G_OBJECT (self->details->bg)); self->details->bg = NULL; } free_background_surface (self); free_fade (self); G_OBJECT_CLASS (eel_background_parent_class)->finalize (object); } static void eel_background_unrealize (EelBackground *self) { free_background_surface (self); self->details->bg_entire_width = 0; self->details->bg_entire_height = 0; self->details->default_color.red = 0xffff; self->details->default_color.green = 0xffff; self->details->default_color.blue = 0xffff; } #define CLAMP_COLOR(v) (t = (v), CLAMP (t, 0, G_MAXUSHORT)) #define SATURATE(v) ((1.0 - saturation) * intensity + saturation * (v)) static void make_color_inactive (EelBackground *self, #if GTK_CHECK_VERSION (3, 0, 0) GdkRGBA *color) #else GdkColor *color) #endif { double intensity, saturation; gushort t; if (!self->details->is_active) { saturation = 0.7; intensity = color->red * 0.30 + color->green * 0.59 + color->blue * 0.11; color->red = SATURATE (color->red); color->green = SATURATE (color->green); color->blue = SATURATE (color->blue); if (intensity > G_MAXUSHORT / 2) { color->red *= 0.9; color->green *= 0.9; color->blue *= 0.9; } else { color->red *= 1.25; color->green *= 1.25; color->blue *= 1.25; } color->red = CLAMP_COLOR (color->red); color->green = CLAMP_COLOR (color->green); color->blue = CLAMP_COLOR (color->blue); } } gchar * eel_bg_get_desktop_color (EelBackground *self) { MateBGColorType type; #if GTK_CHECK_VERSION (3, 0, 0) GdkRGBA primary, secondary; #else GdkColor primary, secondary; #endif char *start_color, *end_color, *color_spec; gboolean use_gradient = TRUE; gboolean is_horizontal = FALSE; mate_bg_get_color (self->details->bg, &type, &primary, &secondary); if (type == MATE_BG_COLOR_V_GRADIENT) { is_horizontal = FALSE; } else if (type == MATE_BG_COLOR_H_GRADIENT) { is_horizontal = TRUE; } else /* implicit (type == MATE_BG_COLOR_SOLID) */ { use_gradient = FALSE; } #if GTK_CHECK_VERSION (3, 0, 0) start_color = eel_gdk_rgb_to_color_spec (eel_gdk_rgba_to_rgb (&primary)); if (use_gradient) { end_color = eel_gdk_rgb_to_color_spec (eel_gdk_rgba_to_rgb (&secondary)); #else start_color = eel_gdk_rgb_to_color_spec (eel_gdk_color_to_rgb (&primary)); if (use_gradient) { end_color = eel_gdk_rgb_to_color_spec (eel_gdk_color_to_rgb (&secondary)); #endif color_spec = eel_gradient_new (start_color, end_color, is_horizontal); g_free (end_color); } else { color_spec = g_strdup (start_color); } g_free (start_color); return color_spec; } #if GTK_CHECK_VERSION (3, 0, 0) static void set_image_properties (EelBackground *self) { GdkRGBA c; if (self->details->is_desktop && !self->details->color) self->details->color = eel_bg_get_desktop_color (self); if (!self->details->color) { c = self->details->default_color; make_color_inactive (self, &c); mate_bg_set_color (self->details->bg, MATE_BG_COLOR_SOLID, &c, NULL); } else if (!eel_gradient_is_gradient (self->details->color)) { eel_gdk_rgba_parse_with_white_default (&c, self->details->color); make_color_inactive (self, &c); mate_bg_set_color (self->details->bg, MATE_BG_COLOR_SOLID, &c, NULL); } else { GdkRGBA c1, c2; char *spec; spec = eel_gradient_get_start_color_spec (self->details->color); eel_gdk_rgba_parse_with_white_default (&c1, spec); make_color_inactive (self, &c1); g_free (spec); spec = eel_gradient_get_end_color_spec (self->details->color); eel_gdk_rgba_parse_with_white_default (&c2, spec); make_color_inactive (self, &c2); g_free (spec); if (eel_gradient_is_horizontal (self->details->color)) { mate_bg_set_color (self->details->bg, MATE_BG_COLOR_H_GRADIENT, &c1, &c2); } else { mate_bg_set_color (self->details->bg, MATE_BG_COLOR_V_GRADIENT, &c1, &c2); } } } #else static void set_image_properties (EelBackground *self) { GdkColor c; if (self->details->is_desktop && !self->details->color) self->details->color = eel_bg_get_desktop_color (self); if (!self->details->color) { c = self->details->default_color; make_color_inactive (self, &c); mate_bg_set_color (self->details->bg, MATE_BG_COLOR_SOLID, &c, NULL); } else if (!eel_gradient_is_gradient (self->details->color)) { eel_gdk_color_parse_with_white_default (self->details->color, &c); make_color_inactive (self, &c); mate_bg_set_color (self->details->bg, MATE_BG_COLOR_SOLID, &c, NULL); } else { GdkColor c1, c2; char *spec; spec = eel_gradient_get_start_color_spec (self->details->color); eel_gdk_color_parse_with_white_default (spec, &c1); make_color_inactive (self, &c1); g_free (spec); spec = eel_gradient_get_end_color_spec (self->details->color); eel_gdk_color_parse_with_white_default (spec, &c2); make_color_inactive (self, &c2); g_free (spec); if (eel_gradient_is_horizontal (self->details->color)) { mate_bg_set_color (self->details->bg, MATE_BG_COLOR_H_GRADIENT, &c1, &c2); } else { mate_bg_set_color (self->details->bg, MATE_BG_COLOR_V_GRADIENT, &c1, &c2); } } } #endif gchar * eel_background_get_color (EelBackground *self) { g_return_val_if_fail (EEL_IS_BACKGROUND (self), NULL); return g_strdup (self->details->color); } /* @color: color or gradient to set */ void eel_background_set_color (EelBackground *self, const gchar *color) { if (g_strcmp0 (self->details->color, color) != 0) { g_free (self->details->color); self->details->color = g_strdup (color); set_image_properties (self); } } /* Use style->base as the default color instead of bg */ void eel_background_set_use_base (EelBackground *self, gboolean use_base) { self->details->use_base = use_base; } static void drawable_get_adjusted_size (EelBackground *self, int *width, int *height) { if (self->details->is_desktop) { GdkScreen *screen = gtk_widget_get_screen (self->details->widget); *width = gdk_screen_get_width (screen); *height = gdk_screen_get_height (screen); } else { GdkWindow *window = gtk_widget_get_window (self->details->widget); *width = gdk_window_get_width (window); *height = gdk_window_get_height (window); } } static gboolean eel_background_ensure_realized (EelBackground *self) { int width, height; GdkWindow *window; #if GTK_CHECK_VERSION (3, 0, 0) GtkStyleContext *style; /* Set the default color */ style = gtk_widget_get_style_context (self->details->widget); gtk_style_context_save (style); gtk_style_context_set_state (style, GTK_STATE_FLAG_NORMAL); if (self->details->use_base) { gtk_style_context_add_class (style, GTK_STYLE_CLASS_VIEW); } gtk_style_context_get_background_color (style, gtk_style_context_get_state (style), &self->details->default_color); gtk_style_context_restore (style); #else GtkStyle *style; /* Set the default color */ style = gtk_widget_get_style (self->details->widget); if (self->details->use_base) { self->details->default_color = style->base[GTK_STATE_NORMAL]; } else { self->details->default_color = style->bg[GTK_STATE_NORMAL]; } #endif /* If the window size is the same as last time, don't update */ drawable_get_adjusted_size (self, &width, &height); if (width == self->details->bg_entire_width && height == self->details->bg_entire_height) { return FALSE; } free_background_surface (self); set_image_properties (self); window = gtk_widget_get_window (self->details->widget); self->details->bg_surface = mate_bg_create_surface (self->details->bg, window, width, height, self->details->is_desktop); self->details->unset_root_surface = self->details->is_desktop; self->details->bg_entire_width = width; self->details->bg_entire_height = height; return TRUE; } void eel_background_draw (GtkWidget *widget, # if GTK_CHECK_VERSION (3, 0, 0) cairo_t *cr) { int width, height; GdkWindow *window = gtk_widget_get_window (widget); GdkRGBA color; EelBackground *self = eel_get_widget_background (widget); drawable_get_adjusted_size (self, &width, &height); eel_background_ensure_realized (self); color = self->details->default_color; make_color_inactive (self, &color); cairo_save (cr); if (self->details->bg_surface != NULL) { cairo_set_source_surface (cr, self->details->bg_surface, 0, 0); cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT); } else { gdk_cairo_set_source_rgba (cr, &color); } cairo_rectangle (cr, 0, 0, width, height); cairo_fill (cr); cairo_restore (cr); } # else GdkEventExpose *event) { int width, height; GdkWindow *window = gtk_widget_get_window (widget); GdkColor color; if (event->window != window) return; EelBackground *self = eel_get_widget_background (widget); drawable_get_adjusted_size (self, &width, &height); eel_background_ensure_realized (self); color = self->details->default_color; make_color_inactive (self, &color); cairo_t *cr = gdk_cairo_create (window); if (self->details->bg_surface != NULL) { cairo_set_source_surface (cr, self->details->bg_surface, 0, 0); cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT); } else { gdk_cairo_set_source_color (cr, &color); } gdk_cairo_rectangle (cr, &event->area); cairo_clip (cr); cairo_rectangle (cr, 0, 0, width, height); cairo_fill (cr); cairo_destroy (cr); } # endif static void set_root_surface (EelBackground *self, GdkWindow *window, GdkScreen *screen) { eel_background_ensure_realized (self); if (self->details->use_common_surface) { self->details->unset_root_surface = FALSE; } else { int width, height; drawable_get_adjusted_size (self, &width, &height); self->details->bg_surface = mate_bg_create_surface (self->details->bg, window, width, height, TRUE); } if (self->details->bg_surface != NULL) mate_bg_set_surface_as_root (screen, self->details->bg_surface); } static void init_fade (EelBackground *self) { GtkWidget *widget = self->details->widget; gboolean do_fade; if (!self->details->is_desktop || widget == NULL || !gtk_widget_get_realized (widget)) { return; } do_fade = g_settings_get_boolean (mate_background_preferences, MATE_BG_KEY_BACKGROUND_FADE); if (!do_fade) { return; } if (self->details->fade == NULL) { int width, height; /* If this was the result of a screen size change, * we don't want to crossfade */ drawable_get_adjusted_size (self, &width, &height); if (width == self->details->bg_entire_width && height == self->details->bg_entire_height) { self->details->fade = mate_bg_crossfade_new (width, height); g_signal_connect_swapped (self->details->fade, "finished", G_CALLBACK (free_fade), self); } } if (self->details->fade != NULL && !mate_bg_crossfade_is_started (self->details->fade)) { if (self->details->bg_surface == NULL) { cairo_surface_t *start_surface; start_surface = mate_bg_get_surface_from_root (gtk_widget_get_screen (widget)); mate_bg_crossfade_set_start_surface (self->details->fade, start_surface); cairo_surface_destroy (start_surface); } else { mate_bg_crossfade_set_start_surface (self->details->fade, self->details->bg_surface); } } } static void on_fade_finished (MateBGCrossfade *fade, GdkWindow *window, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); set_root_surface (self, window, gdk_window_get_screen (window)); } static gboolean fade_to_surface (EelBackground *self, GdkWindow *window, cairo_surface_t *surface) { if (self->details->fade == NULL || !mate_bg_crossfade_set_end_surface (self->details->fade, surface)) { return FALSE; } if (!mate_bg_crossfade_is_started (self->details->fade)) { mate_bg_crossfade_start (self->details->fade, window); if (self->details->is_desktop) { g_signal_connect (self->details->fade, "finished", G_CALLBACK (on_fade_finished), self); } } return mate_bg_crossfade_is_started (self->details->fade); } static void eel_background_set_up_widget (EelBackground *self) { GdkWindow *window; GtkWidget *widget = self->details->widget; # if GTK_CHECK_VERSION (3, 0, 0) GdkRGBA color; #else GdkColor color; #endif gboolean in_fade = FALSE; if (!gtk_widget_get_realized (widget)) return; eel_background_ensure_realized (self); color = self->details->default_color; make_color_inactive (self, &color); if (self->details->bg_surface == NULL) return; if (EEL_IS_CANVAS (widget)) { window = gtk_layout_get_bin_window (GTK_LAYOUT (widget)); } else { window = gtk_widget_get_window (widget); } if (self->details->fade != NULL) in_fade = fade_to_surface (self, window, self->details->bg_surface); if (!in_fade) { # if GTK_CHECK_VERSION (3, 0, 0) cairo_pattern_t *pattern; pattern = cairo_pattern_create_for_surface (self->details->bg_surface); gdk_window_set_background_pattern (window, pattern); cairo_pattern_destroy (pattern); # endif if (self->details->is_desktop) { # if !GTK_CHECK_VERSION (3, 0, 0) gdk_window_set_back_pixmap (window, self->details->bg_surface, FALSE); # endif set_root_surface (self, window, gtk_widget_get_screen (widget)); } else { #if GTK_CHECK_VERSION (3, 0, 0) gdk_window_set_background_rgba (window, &color); #else gdk_window_set_background (window, &color); #endif # if !GTK_CHECK_VERSION (3, 0, 0) gdk_window_set_back_pixmap (window, self->details->bg_surface, FALSE); # endif } gdk_window_invalidate_rect (window, NULL, TRUE); } } static gboolean background_changed_cb (EelBackground *self) { if (self->details->change_idle_id == 0) { return FALSE; } self->details->change_idle_id = 0; eel_background_unrealize (self); eel_background_set_up_widget (self); gtk_widget_queue_draw (self->details->widget); return FALSE; } static void widget_queue_background_change (GtkWidget *widget, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); if (self->details->change_idle_id != 0) { g_source_remove (self->details->change_idle_id); } self->details->change_idle_id = g_idle_add ((GSourceFunc) background_changed_cb, self); } /* Callback used when the style of a widget changes. We have to regenerate its * EelBackgroundStyle so that it will match the chosen GTK+ theme. */ static void widget_style_set_cb (GtkWidget *widget, GtkStyle *previous_style, gpointer user_data) { if (previous_style != NULL) widget_queue_background_change (widget, user_data); } static void eel_background_changed (MateBG *bg, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); init_fade (self); g_signal_emit (G_OBJECT (self), signals[APPEARANCE_CHANGED], 0); } static void eel_background_transitioned (MateBG *bg, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); free_fade (self); g_signal_emit (G_OBJECT (self), signals[APPEARANCE_CHANGED], 0); } static void screen_size_changed (GdkScreen *screen, EelBackground *background) { int w, h; drawable_get_adjusted_size (background, &w, &h); if (w != background->details->bg_entire_width || h != background->details->bg_entire_height) { g_signal_emit (background, signals[APPEARANCE_CHANGED], 0); } } static void widget_realized_setup (GtkWidget *widget, EelBackground *self) { if (!self->details->is_desktop) { return; } GdkScreen *screen = gtk_widget_get_screen (widget); GdkWindow *window = gdk_screen_get_root_window (screen); if (self->details->screen_size_handler > 0) { g_signal_handler_disconnect (screen, self->details->screen_size_handler); } self->details->screen_size_handler = g_signal_connect (screen, "size_changed", G_CALLBACK (screen_size_changed), self); if (self->details->screen_monitors_handler > 0) { g_signal_handler_disconnect (screen, self->details->screen_monitors_handler); } self->details->screen_monitors_handler = g_signal_connect (screen, "monitors-changed", G_CALLBACK (screen_size_changed), self); self->details->use_common_surface = (gdk_window_get_visual (window) == gtk_widget_get_visual (widget)) ? TRUE : FALSE; init_fade (self); } static void widget_realize_cb (GtkWidget *widget, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); widget_realized_setup (widget, self); eel_background_set_up_widget (self); } static void widget_unrealize_cb (GtkWidget *widget, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); if (self->details->screen_size_handler > 0) { g_signal_handler_disconnect (gtk_widget_get_screen (GTK_WIDGET (widget)), self->details->screen_size_handler); self->details->screen_size_handler = 0; } if (self->details->screen_monitors_handler > 0) { g_signal_handler_disconnect (gtk_widget_get_screen (GTK_WIDGET (widget)), self->details->screen_monitors_handler); self->details->screen_monitors_handler = 0; } self->details->use_common_surface = FALSE; } static void on_widget_destroyed (GtkWidget *widget, gpointer user_data) { EelBackground *self = EEL_BACKGROUND (user_data); if (self->details->change_idle_id != 0) { g_source_remove (self->details->change_idle_id); self->details->change_idle_id = 0; } free_fade (self); self->details->widget = NULL; } /* Gets the background attached to a widget. If the widget doesn't already have a EelBackground object, this will create one. To change the widget's background, you can just call eel_background methods on the widget. If the widget is a canvas, nothing more needs to be done. For normal widgets, you need to call eel_background_draw() from your draw/expose handler to draw the background. Later, we might want a call to find out if we already have a background, or a way to share the same background among multiple widgets; both would be straightforward. */ EelBackground * eel_get_widget_background (GtkWidget *widget) { g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL); /* Check for an existing background. */ gpointer data = g_object_get_data (G_OBJECT (widget), "eel_background"); if (data != NULL) { g_assert (EEL_IS_BACKGROUND (data)); return data; } /* Store the background in the widget's data. */ EelBackground *self = eel_background_new (); g_object_set_data_full (G_OBJECT (widget), "eel_background", self, g_object_unref); self->details->widget = widget; g_signal_connect_object (widget, "destroy", G_CALLBACK (on_widget_destroyed), self, 0); g_signal_connect_object (widget, "realize", G_CALLBACK (widget_realize_cb), self, 0); g_signal_connect_object (widget, "unrealize", G_CALLBACK (widget_unrealize_cb), self, 0); g_signal_connect_object (widget, "style_set", G_CALLBACK (widget_style_set_cb), self, 0); /* Arrange to get the signal whenever the background changes. */ g_signal_connect_object (self, "appearance_changed", G_CALLBACK (widget_queue_background_change), widget, G_CONNECT_SWAPPED); widget_queue_background_change (widget, self); return self; } static void eel_background_class_init (EelBackgroundClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); signals[APPEARANCE_CHANGED] = g_signal_new ("appearance_changed", G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE, G_STRUCT_OFFSET (EelBackgroundClass, appearance_changed), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); signals[SETTINGS_CHANGED] = g_signal_new ("settings_changed", G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE, G_STRUCT_OFFSET (EelBackgroundClass, settings_changed), NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); signals[RESET] = g_signal_new ("reset", G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE, G_STRUCT_OFFSET (EelBackgroundClass, reset), NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); object_class->finalize = eel_background_finalize; g_type_class_add_private (klass, sizeof (EelBackgroundDetails)); } static void eel_background_init (EelBackground *self) { self->details = G_TYPE_INSTANCE_GET_PRIVATE (self, EEL_TYPE_BACKGROUND, EelBackgroundDetails); self->details->bg = mate_bg_new (); self->details->default_color.red = 0xffff; self->details->default_color.green = 0xffff; self->details->default_color.blue = 0xffff; self->details->is_active = TRUE; g_signal_connect (self->details->bg, "changed", G_CALLBACK (eel_background_changed), self); g_signal_connect (self->details->bg, "transitioned", G_CALLBACK (eel_background_transitioned), self); } /** * eel_background_is_set: * * Check whether the background's color or image has been set. */ gboolean eel_background_is_set (EelBackground *self) { g_assert (EEL_IS_BACKGROUND (self)); return self->details->color != NULL || mate_bg_get_filename (self->details->bg) != NULL; } /** * eel_background_reset: * * Emit the reset signal to forget any color or image that has been * set previously. */ void eel_background_reset (EelBackground *self) { g_return_if_fail (EEL_IS_BACKGROUND (self)); g_signal_emit (self, signals[RESET], 0); } void eel_background_set_desktop (EelBackground *self, GtkWidget *widget, gboolean is_desktop) { self->details->is_desktop = is_desktop; if (gtk_widget_get_realized (widget) && is_desktop) { widget_realized_setup (widget, self); } } gboolean eel_background_is_desktop (EelBackground *self) { return self->details->is_desktop; } void eel_background_set_active (EelBackground *self, gboolean is_active) { if (self->details->is_active != is_active) { self->details->is_active = is_active; set_image_properties (self); } } /* determine if a background is darker or lighter than average, to help clients know what colors to draw on top with */ gboolean eel_background_is_dark (EelBackground *self) { GdkRectangle rect; /* only check for the background on the 0th monitor */ GdkScreen *screen = gdk_screen_get_default (); gdk_screen_get_monitor_geometry (screen, 0, &rect); return mate_bg_is_dark (self->details->bg, rect.width, rect.height); } gchar * eel_background_get_image_uri (EelBackground *self) { g_return_val_if_fail (EEL_IS_BACKGROUND (self), NULL); const gchar *filename = mate_bg_get_filename (self->details->bg); if (filename) { return g_filename_to_uri (filename, NULL, NULL); } return NULL; } static void eel_bg_set_image_uri_helper (EelBackground *self, const gchar *image_uri, gboolean emit_signal) { gchar *filename; if (image_uri != NULL) { filename = g_filename_from_uri (image_uri, NULL, NULL); } else { filename = g_strdup (""); /* GSettings expects a string, not NULL */ } mate_bg_set_filename (self->details->bg, filename); g_free (filename); if (emit_signal) g_signal_emit (self, signals[SETTINGS_CHANGED], 0, GDK_ACTION_COPY); set_image_properties (self); } /* Use this function to set an image only (no color). * Also, to unset an image, use: eel_bg_set_image_uri (background, NULL) */ void eel_background_set_image_uri (EelBackground *self, const gchar *image_uri) { eel_bg_set_image_uri_helper (self, image_uri, TRUE); } /* Use this fn to set both the image and color and avoid flash. The color isn't * changed till after the image is done loading, that way if an update occurs * before then, it will use the old color and image. */ static void eel_bg_set_image_uri_and_color (EelBackground *self, GdkDragAction action, const gchar *image_uri, const gchar *color) { if (self->details->is_desktop && !mate_bg_get_draw_background (self->details->bg)) { mate_bg_set_draw_background (self->details->bg, TRUE); } eel_bg_set_image_uri_helper (self, image_uri, FALSE); eel_background_set_color (self, color); /* We always emit, even if the color didn't change, because the image change relies on us doing it here. */ g_signal_emit (self, signals[SETTINGS_CHANGED], 0, action); } void eel_bg_set_placement (EelBackground *self, MateBGPlacement placement) { if (self->details->bg) mate_bg_set_placement (self->details->bg, placement); } void eel_bg_save_to_gsettings (EelBackground *self, GSettings *settings) { if (self->details->bg) mate_bg_save_to_gsettings (self->details->bg, settings); } void eel_bg_load_from_gsettings (EelBackground *self, GSettings *settings) { if (self->details->bg) mate_bg_load_from_gsettings (self->details->bg, settings); } void eel_bg_load_from_system_gsettings (EelBackground *self, GSettings *settings, gboolean apply) { if (self->details->bg) mate_bg_load_from_system_gsettings (self->details->bg, settings, apply); } /* handle dropped images */ void eel_background_set_dropped_image (EelBackground *self, GdkDragAction action, const gchar *image_uri) { /* Currently, we only support tiled images. So we set the placement. */ mate_bg_set_placement (self->details->bg, MATE_BG_PLACEMENT_TILED); eel_bg_set_image_uri_and_color (self, action, image_uri, NULL); } /* handle dropped colors */ void eel_background_set_dropped_color (EelBackground *self, GtkWidget *widget, GdkDragAction action, int drop_location_x, int drop_location_y, const GtkSelectionData *selection_data) { guint16 *channels; char *color_spec, *gradient_spec; char *new_gradient_spec; int left_border, right_border, top_border, bottom_border; GtkAllocation allocation; g_return_if_fail (EEL_IS_BACKGROUND (self)); g_return_if_fail (GTK_IS_WIDGET (widget)); g_return_if_fail (selection_data != NULL); /* Convert the selection data into a color spec. */ if (gtk_selection_data_get_length ((GtkSelectionData *) selection_data) != 8 || gtk_selection_data_get_format ((GtkSelectionData *) selection_data) != 16) { g_warning ("received invalid color data"); return; } channels = (guint16 *) gtk_selection_data_get_data ((GtkSelectionData *) selection_data); color_spec = g_strdup_printf ("#%02X%02X%02X", channels[0] >> 8, channels[1] >> 8, channels[2] >> 8); /* Figure out if the color was dropped close enough to an edge to create a gradient. For the moment, this is hard-wired, but later the widget will have to have some say in where the borders are. */ gtk_widget_get_allocation (widget, &allocation); left_border = 32; right_border = allocation.width - 32; top_border = 32; bottom_border = allocation.height - 32; #if GTK_CHECK_VERSION (3, 0, 0) /* If a custom background color isn't set, get the GtkStyleContext's bg color. */ #else /* If a custom background color isn't set, get the GtkStyle's bg color. */ #endif if (!self->details->color) { #if GTK_CHECK_VERSION (3, 0, 0) GtkStyleContext *style = gtk_widget_get_style_context (widget); GdkRGBA bg; gtk_style_context_get_background_color (style, GTK_STATE_FLAG_NORMAL, &bg); gradient_spec = gdk_rgba_to_string (&bg); #else gradient_spec = gdk_color_to_string (>k_widget_get_style (widget)->bg[GTK_STATE_NORMAL]); #endif } else { gradient_spec = g_strdup (self->details->color); } if (drop_location_x < left_border && drop_location_x <= right_border) { new_gradient_spec = eel_gradient_set_left_color_spec (gradient_spec, color_spec); } else if (drop_location_x >= left_border && drop_location_x > right_border) { new_gradient_spec = eel_gradient_set_right_color_spec (gradient_spec, color_spec); } else if (drop_location_y < top_border && drop_location_y <= bottom_border) { new_gradient_spec = eel_gradient_set_top_color_spec (gradient_spec, color_spec); } else if (drop_location_y >= top_border && drop_location_y > bottom_border) { new_gradient_spec = eel_gradient_set_bottom_color_spec (gradient_spec, color_spec); } else { new_gradient_spec = g_strdup (color_spec); } g_free (color_spec); g_free (gradient_spec); eel_bg_set_image_uri_and_color (self, action, NULL, new_gradient_spec); g_free (new_gradient_spec); } EelBackground * eel_background_new (void) { return EEL_BACKGROUND (g_object_new (EEL_TYPE_BACKGROUND, NULL)); } /* * self check code */ #if !defined (EEL_OMIT_SELF_CHECK) void eel_self_check_background (void) { EelBackground *self = eel_background_new (); eel_background_set_color (self, NULL); eel_background_set_color (self, ""); eel_background_set_color (self, "red"); eel_background_set_color (self, "red-blue"); eel_background_set_color (self, "red-blue:h"); g_object_ref_sink (self); g_object_unref (self); } #endif