Improve demo.c

1 files changed, 14 insertions, 4 deletions

diff --git a/demo.c b/demo.c
index 23765fe..828fede 100644
--- a/demo.c
+++ b/demo.c
@@ -19,7 +19,9 @@ static const pixman_rectangle32_t rects[] = {
     { 250, 350, 150, 50 },
     { 450, 350, 50, 50 },
     { 50, 450, 400, 50 },
-    { 25, 135, 600, 25 }
+    { 25, 135, 600, 25 },
+    { 25, 355, 600, 25 },
+    { 125, 305, 300, 25 }
 };
 
 #define N_RECTS   (sizeof (rects) / sizeof (rects[0]))
@@ -77,7 +79,8 @@ on_expose (GtkWidget *widget, GdkEvent *event, gpointer data)
 			     50 + rects[i].x, 50 + rects[i].y,
 			     rects[i].width, rects[i].height);
 
-	    cairo_set_source_rgba (cr, 0.4, 0.4, 0.0, 0.4);
+	    cairo_set_source_rgba (
+		cr, g_random_double(), g_random_double(), g_random_double(), 0.4);
 	    cairo_fill (cr);
 	}
 
@@ -100,7 +103,7 @@ on_expose (GtkWidget *widget, GdkEvent *event, gpointer data)
 	    }
 	}
 
-	cairo_set_source_rgba (cr, 0.2, 0.8, 0.2, 0.6);
+	cairo_set_source_rgba (cr, 0.2, g_random_double(), 0.2, 0);
 
 	cairo_fill_preserve (cr);
 
@@ -116,6 +119,12 @@ on_expose (GtkWidget *widget, GdkEvent *event, gpointer data)
     return TRUE;
 }
 
+static void
+on_allocate (GtkWidget *widget, GtkAllocation *allocation)
+{
+    gtk_widget_queue_draw (widget);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -127,9 +136,10 @@ main (int argc, char **argv)
 
     gtk_window_set_default_size (window, 1200, 768);
 
+    g_signal_connect (window, "size_allocate", G_CALLBACK (on_allocate), NULL);
     g_signal_connect (window, "expose_event", G_CALLBACK (on_expose), NULL);
 
-    gtk_widget_show_all (window);
+    gtk_widget_show_all (GTK_WIDGET (window));
 
     gtk_main ();