[gnome-control-center/wip/jsparber/background: 12/41] background: add icon for with time changing wallpapers

[Julian Sparber <jsparber src gnome org>]

commit c062d1797f394651f43514f59b56edf2f7ad306b
Author: Julian Sparber <julian sparber net>
Date:   Sat Nov 11 23:57:35 2017 +0100

    background: add icon for with time changing wallpapers
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788515

 panels/background/cc-background-panel.c | 173 +++++++++++++++++++-------------
 1 file changed, 102 insertions(+), 71 deletions(-)
---
diff --git a/panels/background/cc-background-panel.c b/panels/background/cc-background-panel.c
index dd76ab0c0..ff4d491e7 100644
--- a/panels/background/cc-background-panel.c
+++ b/panels/background/cc-background-panel.c
@@ -57,7 +57,6 @@ struct _CcBackgroundPanel
 
   CcBackgroundItem *current_background;
   CcBackgroundStore *store;
-  gint gallery_size;
 
   GCancellable *copy_cancellable;
 
@@ -184,15 +183,93 @@ get_save_path (CcBackgroundPanel *panel, GSettings *settings)
                            NULL);
 }
 
+static void
+add_slideshow_emblem (GdkPixbuf *pixbuf,
+                      gint w,
+                      gint h,
+                      gint scale_factor)
+{
+  GdkPixbuf *slideshow_emblem;
+  GIcon *icon = NULL;
+  GtkIconInfo *icon_info = NULL;
+  GError *error = NULL;
+  GtkIconTheme *theme;
+
+  int eh;
+  int ew;
+  //int h;
+  //int w;
+  int x;
+  int y;
+
+  icon = g_themed_icon_new ("slideshow-emblem");
+  theme = gtk_icon_theme_get_default ();
+  icon_info = gtk_icon_theme_lookup_by_gicon_for_scale (theme,
+                                                        icon,
+                                                        16,
+                                                        scale_factor,
+                                                        GTK_ICON_LOOKUP_FORCE_SIZE |
+                                                        GTK_ICON_LOOKUP_USE_BUILTIN);
+  if (icon_info == NULL) {
+    g_warning ("Your icon theme is missing the slideshow-emblem icon, "
+               "please file a bug against it");
+  }
+  else {
+
+    slideshow_emblem = gtk_icon_info_load_icon (icon_info, &error);
+    if (slideshow_emblem == NULL) {
+      g_warning ("Failed to load slideshow emblem: %s", error->message);
+      g_error_free (error);
+    }
+    else {
+      eh = gdk_pixbuf_get_height (slideshow_emblem);
+      ew = gdk_pixbuf_get_width (slideshow_emblem);
+      //h = gdk_pixbuf_get_height (pixbuf);
+      //w = gdk_pixbuf_get_width (pixbuf);
+      x = w - ew - 5;
+      y = h - eh - 5;
+
+      gdk_pixbuf_composite (slideshow_emblem, pixbuf, x, y, ew, eh, x, y, 1.0, 1.0, GDK_INTERP_BILINEAR, 
255);
+    }
+  }
+
+  g_clear_object (&icon_info);
+  g_clear_object (&icon);
+}
+
+
+
+static GdkPixbuf*
+get_or_create_cached_pixbuf_with_size (CcBackgroundPanel *panel,
+                                       const gint width,
+                                       const gint height,
+                                       CcBackgroundItem  *item)
+{
+  gint scale_factor;
+  GdkPixbuf *pixbuf;
+
+  pixbuf = g_object_get_data (G_OBJECT (item), "pixbuf");
+  if (pixbuf == NULL ||
+      gdk_pixbuf_get_width (pixbuf) != width ||
+      gdk_pixbuf_get_height (pixbuf) != height) {
+    scale_factor = gtk_widget_get_scale_factor (panel);
+    pixbuf = cc_background_item_get_frame_thumbnail (item,
+                                                     panel->thumb_factory,
+                                                     width,
+                                                     height,
+                                                     scale_factor,
+                                                     -2, TRUE);
+    g_object_set_data_full (G_OBJECT (item), "pixbuf", pixbuf, g_object_unref);
+  }
+
+  return pixbuf;
+}
+
 static GdkPixbuf*
 get_or_create_cached_pixbuf (CcBackgroundPanel *panel,
                              GtkWidget         *widget,
                              CcBackgroundItem  *background)
 {
-  GtkAllocation allocation;
-
-  //const gint preview_width = 310; //309
-  //const gint preview_height = 174; //168
   gint scale_factor;
   GdkPixbuf *pixbuf;
   const gint preview_width = gtk_widget_get_allocated_width (widget);
@@ -202,8 +279,6 @@ get_or_create_cached_pixbuf (CcBackgroundPanel *panel,
   if (pixbuf == NULL ||
       gdk_pixbuf_get_width (pixbuf) != preview_width ||
       gdk_pixbuf_get_height (pixbuf) != preview_height) {
-
-    gtk_widget_get_allocation (widget, &allocation);
     scale_factor = gtk_widget_get_scale_factor (widget);
     pixbuf = cc_background_item_get_frame_thumbnail (background,
                                                      panel->thumb_factory,
@@ -335,10 +410,12 @@ on_gallery_item_draw (GtkWidget         *widget,
                       cairo_t           *cr,
                       GdkPixbuf *pixbuf)
 {
+  //GdkPixbuf *pixbuf;
   const gint space_width = gtk_widget_get_allocated_width (widget);
   const gint space_height = gtk_widget_get_allocated_height ( (widget));
   const gint pixbuf_width = gdk_pixbuf_get_width (pixbuf);
   const gint pixbuf_height = gdk_pixbuf_get_height (pixbuf);
+  const gint scale_factor = gtk_widget_get_scale_factor (widget);
   gint new_width;
   gint new_height;
 
@@ -351,14 +428,26 @@ on_gallery_item_draw (GtkWidget         *widget,
     new_height = space_height;
   }
 
+  /* pixbuf = get_or_create_cached_pixbuf_with_size (panel,
+     new_width,
+     new_height,
+     cc_background_grid_item_get_ref (gtk_widget_get_parent(widget)));
+
+*/
+
   pixbuf = gdk_pixbuf_scale_simple (pixbuf,
                                     new_width,
                                     new_height,
                                     GDK_INTERP_BILINEAR);
 
+  if (cc_background_item_changes_with_time (cc_background_grid_item_get_ref 
(gtk_widget_get_parent(widget)))) {
+    add_slideshow_emblem (pixbuf, (space_width + new_width) / 2, (space_height + new_height)/2, 
scale_factor);
+  }
+
   gdk_cairo_set_source_pixbuf (cr,
                                pixbuf,
-                               -(new_width - space_width)/2, -(new_height - space_height)/2);
+                               (space_width - new_width) / 2,
+                               (space_height - new_height) / 2);
   cairo_paint (cr);
 
   return TRUE;
@@ -379,10 +468,6 @@ on_panel_resize (GtkWidget *widget,
   else {
     gtk_widget_set_size_request (preview, -1, 150);
   }
-
-  if (allocation->width < 400) {
-    panel->gallery_size = 10;
-  }
 }
 
 static void
@@ -844,58 +929,6 @@ is_gnome_photos_installed ()
   return TRUE;
 }
 
-static void
-add_slideshow_emblem (GdkPixbuf *pixbuf,
-                      gint scale_factor)
-{
-  GdkPixbuf *slideshow_emblem;
-  GIcon *icon = NULL;
-  GtkIconInfo *icon_info = NULL;
-  GError *error = NULL;
-  GtkIconTheme *theme;
-
-  int eh;
-  int ew;
-  int h;
-  int w;
-  int x;
-  int y;
-
-  icon = g_themed_icon_new ("slideshow-emblem");
-  theme = gtk_icon_theme_get_default ();
-  icon_info = gtk_icon_theme_lookup_by_gicon_for_scale (theme,
-                                                        icon,
-                                                        16,
-                                                        scale_factor,
-                                                        GTK_ICON_LOOKUP_FORCE_SIZE |
-                                                        GTK_ICON_LOOKUP_USE_BUILTIN);
-  if (icon_info == NULL) {
-    g_warning ("Your icon theme is missing the slideshow-emblem icon, "
-               "please file a bug against it");
-  }
-  else {
-
-    slideshow_emblem = gtk_icon_info_load_icon (icon_info, &error);
-    if (slideshow_emblem == NULL) {
-      g_warning ("Failed to load slideshow emblem: %s", error->message);
-      g_error_free (error);
-    }
-    else {
-      eh = gdk_pixbuf_get_height (slideshow_emblem);
-      ew = gdk_pixbuf_get_width (slideshow_emblem);
-      h = gdk_pixbuf_get_height (pixbuf);
-      w = gdk_pixbuf_get_width (pixbuf);
-      x = w - ew - 5;
-      y = h - eh - 5;
-
-      gdk_pixbuf_composite (slideshow_emblem, pixbuf, x, y, ew, eh, x, y, 1.0, 1.0, GDK_INTERP_BILINEAR, 
255);
-    }
-  }
-
-  g_clear_object (&icon_info);
-  g_clear_object (&icon);
-}
-
 
 static GtkWidget *
 create_gallery_item (gpointer item,
@@ -904,12 +937,11 @@ create_gallery_item (gpointer item,
   CcBackgroundPanel *panel = user_data;
   GtkWidget *flow;
   GtkWidget *widget;
-  GtkWidget *frame;
   GdkPixbuf *pixbuf;
   CcBackgroundItem *self = item;
   gint scale_factor;
-  const gint preview_width = 800;//panel->gallery_size;//309;
-  const gint preview_height = 800 * 9 / 16; //panel->gallery_size * 9/16;//168;
+  const gint preview_width = 400;
+  const gint preview_height = 400 * 9 / 16;
 
   scale_factor = gtk_widget_get_scale_factor (GTK_WIDGET (panel));
 
@@ -920,11 +952,11 @@ create_gallery_item (gpointer item,
                                                    scale_factor,
                                                    -2, TRUE);
 
-  if (cc_background_item_changes_with_time (self)) {
+  /*if (cc_background_item_changes_with_time (self)) {
     add_slideshow_emblem (pixbuf, scale_factor);
-  }
+    }
+    */
   widget = gtk_drawing_area_new ();
-  gtk_widget_set_size_request (widget, 250, 250 * 9/16);
   gtk_widget_set_hexpand(widget, TRUE);
   gtk_widget_set_vexpand(widget, TRUE);
   g_signal_connect (G_OBJECT (widget), "draw",
@@ -952,7 +984,6 @@ cc_background_panel_init (CcBackgroundPanel *panel)
 
   /* Create wallpapers store */
   panel->store = cc_background_store_new ();
-  panel->gallery_size = 300;
 
   panel->connection = g_application_get_dbus_connection (g_application_get_default ());
   g_resources_register (cc_background_get_resource ());