[gtk/emblem-demo: 2/3] gtk-demo: Tweak the animated paintable

[Matthias Clasen <matthiasc src gnome org>]

commit f679ba566e6e576975dd0fb268f824521cdf6823
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 11 21:08:36 2020 -0400

    gtk-demo: Tweak the animated paintable
    
    Make it possible to have no background in
    the animated paintable. This will be used
    in a future demo.
    
    Update all users.

 demos/gtk-demo/paintable.c             | 13 ++++++++-----
 demos/gtk-demo/paintable.h             |  5 +++--
 demos/gtk-demo/paintable_animated.c    | 17 +++++++++++++----
 demos/gtk-demo/paintable_mediastream.c |  3 ++-
 demos/gtk-demo/sliding_puzzle.c        |  2 +-
 demos/gtk-demo/textview.c              |  2 +-
 6 files changed, 28 insertions(+), 14 deletions(-)
---
diff --git a/demos/gtk-demo/paintable.c b/demos/gtk-demo/paintable.c
index 3b3da1e0bc..933e7abd48 100644
--- a/demos/gtk-demo/paintable.c
+++ b/demos/gtk-demo/paintable.c
@@ -48,15 +48,17 @@ void
 gtk_nuclear_snapshot (GtkSnapshot *snapshot,
                       double       width,
                       double       height,
-                      double       rotation)
+                      double       rotation,
+                      gboolean     draw_background)
 {
 #define RADIUS 0.3
   cairo_t *cr;
   double size;
 
-  gtk_snapshot_append_color (snapshot,
-                             &(GdkRGBA) { 0.9, 0.75, 0.15, 1.0 },
-                             &GRAPHENE_RECT_INIT (0, 0, width, height));
+  if (draw_background)
+    gtk_snapshot_append_color (snapshot,
+                               &(GdkRGBA) { 0.9, 0.75, 0.15, 1.0 },
+                               &GRAPHENE_RECT_INIT (0, 0, width, height));
 
   size = MIN (width, height);
   cr = gtk_snapshot_append_cairo (snapshot,
@@ -93,7 +95,8 @@ gtk_nuclear_icon_snapshot (GdkPaintable *paintable,
 
   gtk_nuclear_snapshot (snapshot,
                         width, height,
-                        nuclear->rotation);
+                        nuclear->rotation,
+                        TRUE);
 }
 
 static GdkPaintableFlags
diff --git a/demos/gtk-demo/paintable.h b/demos/gtk-demo/paintable.h
index 33bc4dbc8b..a89713f9b1 100644
--- a/demos/gtk-demo/paintable.h
+++ b/demos/gtk-demo/paintable.h
@@ -6,10 +6,11 @@
 void            gtk_nuclear_snapshot           (GtkSnapshot     *snapshot,
                                                 double           width,
                                                 double           height,
-                                                double           rotation);
+                                                double           rotation,
+                                                gboolean         draw_background);
 
 GdkPaintable *  gtk_nuclear_icon_new            (double          rotation);
-GdkPaintable *  gtk_nuclear_animation_new       (void);
+GdkPaintable *  gtk_nuclear_animation_new       (gboolean        draw_background);
 GtkMediaStream *gtk_nuclear_media_stream_new    (void);
 
 #endif /* __PAINTABLE_H__ */
diff --git a/demos/gtk-demo/paintable_animated.c b/demos/gtk-demo/paintable_animated.c
index 17b1372d98..93a51d492c 100644
--- a/demos/gtk-demo/paintable_animated.c
+++ b/demos/gtk-demo/paintable_animated.c
@@ -33,6 +33,8 @@ struct _GtkNuclearAnimation
 {
   GObject parent_instance;
 
+  gboolean draw_background;
+
   /* This variable stores the progress of our animation.
    * We just count upwards until we hit MAX_PROGRESS and
    * then start from scratch.
@@ -64,7 +66,8 @@ gtk_nuclear_animation_snapshot (GdkPaintable *paintable,
   /* We call the function from the previous example here. */
   gtk_nuclear_snapshot (snapshot,
                         width, height,
-                        2 * G_PI * nuclear->progress / MAX_PROGRESS);
+                        2 * G_PI * nuclear->progress / MAX_PROGRESS,
+                        nuclear->draw_background);
 }
 
 static GdkPaintable *
@@ -175,9 +178,15 @@ gtk_nuclear_animation_init (GtkNuclearAnimation *nuclear)
 
 /* And finally, we add the simple constructor we declared in the header. */
 GdkPaintable *
-gtk_nuclear_animation_new (void)
+gtk_nuclear_animation_new (gboolean draw_background)
 {
-  return g_object_new (GTK_TYPE_NUCLEAR_ANIMATION, NULL);
+  GtkNuclearAnimation *nuclear;
+
+  nuclear = g_object_new (GTK_TYPE_NUCLEAR_ANIMATION, NULL);
+
+  nuclear->draw_background = draw_background;
+
+  return GDK_PAINTABLE (nuclear);
 }
 
 GtkWidget *
@@ -195,7 +204,7 @@ do_paintable_animated (GtkWidget *do_widget)
       gtk_window_set_default_size (GTK_WINDOW (window), 300, 200);
       g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
 
-      nuclear = gtk_nuclear_animation_new ();
+      nuclear = gtk_nuclear_animation_new (TRUE);
       image = gtk_image_new_from_paintable (nuclear);
       gtk_window_set_child (GTK_WINDOW (window), image);
       g_object_unref (nuclear);
diff --git a/demos/gtk-demo/paintable_mediastream.c b/demos/gtk-demo/paintable_mediastream.c
index 022c156d8a..6374087b96 100644
--- a/demos/gtk-demo/paintable_mediastream.c
+++ b/demos/gtk-demo/paintable_mediastream.c
@@ -74,7 +74,8 @@ gtk_nuclear_media_stream_snapshot (GdkPaintable *paintable,
   /* We call the function from the previous example here. */
   gtk_nuclear_snapshot (snapshot,
                         width, height,
-                        2 * G_PI * nuclear->progress / DURATION);
+                        2 * G_PI * nuclear->progress / DURATION,
+                        TRUE);
 }
 
 static GdkPaintable *
diff --git a/demos/gtk-demo/sliding_puzzle.c b/demos/gtk-demo/sliding_puzzle.c
index 4cd2ab9116..a91aa6c227 100644
--- a/demos/gtk-demo/sliding_puzzle.c
+++ b/demos/gtk-demo/sliding_puzzle.c
@@ -437,7 +437,7 @@ do_sliding_puzzle (GtkWidget *do_widget)
       choices = gtk_flow_box_new ();
       gtk_widget_add_css_class (choices, "view");
       add_choice (choices, puzzle);
-      add_choice (choices, gtk_nuclear_animation_new ());
+      add_choice (choices, gtk_nuclear_animation_new (TRUE));
       media = gtk_media_file_new_for_resource ("/images/gtk-logo.webm");
       gtk_media_stream_set_loop (media, TRUE);
       gtk_media_stream_set_muted (media, TRUE);
diff --git a/demos/gtk-demo/textview.c b/demos/gtk-demo/textview.c
index ffb0edd318..42c0f6636f 100644
--- a/demos/gtk-demo/textview.c
+++ b/demos/gtk-demo/textview.c
@@ -142,7 +142,7 @@ insert_text (GtkTextView *view)
                                      32, 1,
                                      gtk_widget_get_direction (widget),
                                      0);
-  nuclear = gtk_nuclear_animation_new ();
+  nuclear = gtk_nuclear_animation_new (TRUE);
 
   /* get start of buffer; each insertion will revalidate the
    * iterator to point to just after the inserted text.