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-rw-r--r--tests/testgtk.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/tests/testgtk.c b/tests/testgtk.c
index eeb8c1794b..fa3914db83 100644
--- a/tests/testgtk.c
+++ b/tests/testgtk.c
@@ -129,6 +129,22 @@ on_alpha_window_draw (GtkWidget *widget,
cairo_pattern_t *pattern;
int radius, width, height;
+ /* Get the child allocation to avoid painting over the borders */
+ GtkWidget *child = gtk_bin_get_child (GTK_BIN (widget));
+ GtkAllocation child_allocation;
+ int border_width = gtk_container_get_border_width (GTK_CONTAINER (child));
+
+ gtk_widget_get_allocation (child, &child_allocation);
+ child_allocation.x -= border_width;
+ child_allocation.y -= border_width;
+ child_allocation.width += 2 * border_width;
+ child_allocation.height += 2 * border_width;
+
+ cairo_translate (cr, child_allocation.x, child_allocation.y);
+
+ cairo_rectangle (cr, 0, 0, child_allocation.width, child_allocation.height);
+ cairo_clip (cr);
+
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
radius = MIN (width, height) / 2;