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paned: Be careful about showing windows

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The previous code failed to account for all child visibility and paned
mapedness invariants which could cause stray GDK windows to appear.
Not good.

Credit goes to Xan for triggering it.
This commit is contained in:
Benjamin Otte 2011-05-11 00:46:08 +02:00
parent 1ab425b132
commit f96777ea02
1 changed files with 65 additions and 26 deletions
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91
gtk/gtkpaned.c
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@ -89,6 +89,11 @@
* </example>
*/
enum {
CHILD1,
CHILD2
};
struct _GtkPanedPrivate
{
GtkPaned *first_paned;
@ -978,6 +983,50 @@ flip_child (GtkWidget *widget,
child_pos->x = 2 * x + width - child_pos->x - child_pos->width;
}
static gboolean
gtk_paned_get_child_visible (GtkPaned *paned,
guint id)
{
GtkPanedPrivate *priv = paned->priv;
GtkWidget *child;
child = id == CHILD1 ? priv->child1 : priv->child2;
return (child != NULL && gtk_widget_get_child_visible (child));
}
static void
gtk_paned_set_child_visible (GtkPaned *paned,
guint id,
gboolean visible)
{
GtkPanedPrivate *priv = paned->priv;
GtkWidget *child;
gboolean was_visible;
was_visible = gtk_paned_get_child_visible (paned, id);
child = id == CHILD1 ? priv->child1 : priv->child2;
if (child == NULL)
return;
if (was_visible == visible)
return;
gtk_widget_set_child_visible (child, visible);
if (gtk_widget_get_mapped (GTK_WIDGET (paned)))
{
GdkWindow *window = id == CHILD1 ? priv->child1_window : priv->child2_window;
if (visible)
gdk_window_show (window);
else
gdk_window_hide (window);
}
}
static void
gtk_paned_child_allocate (GtkWidget *child,
GdkWindow *child_window, /* can be NULL */
@ -1182,10 +1231,6 @@ gtk_paned_size_allocate (GtkWidget *widget,
&window2_allocation,
&child2_allocation);
}
if (priv->child1_window)
gdk_window_show (priv->child1_window);
if (priv->child2_window)
gdk_window_show (priv->child2_window);
}
else
{
@ -1195,9 +1240,9 @@ gtk_paned_size_allocate (GtkWidget *widget,
gdk_window_hide (priv->handle);
if (priv->child1)
gtk_widget_set_child_visible (priv->child1, TRUE);
gtk_paned_set_child_visible (paned, 0, TRUE);
if (priv->child2)
gtk_widget_set_child_visible (priv->child2, TRUE);
gtk_paned_set_child_visible (paned, 1, TRUE);
window_allocation.x = allocation->x;
window_allocation.y = allocation->y;
@ -1213,10 +1258,6 @@ gtk_paned_size_allocate (GtkWidget *widget,
priv->child1_window,
&window_allocation,
&child_allocation);
if (priv->child1_window)
gdk_window_show (priv->child1_window);
if (priv->child2_window)
gdk_window_hide (priv->child2_window);
}
else if (priv->child2 && gtk_widget_get_visible (priv->child2))
{
@ -1224,10 +1265,6 @@ gtk_paned_size_allocate (GtkWidget *widget,
priv->child2_window,
&window_allocation,
&child_allocation);
if (priv->child2_window)
gdk_window_show (priv->child2_window);
if (priv->child1_window)
gdk_window_hide (priv->child1_window);
}
}
}
@ -1376,9 +1413,9 @@ gtk_paned_map (GtkWidget *widget)
priv->child2 && gtk_widget_get_visible (priv->child2))
gdk_window_show (priv->handle);
if (priv->child1 && gtk_widget_get_visible (priv->child1))
if (priv->child1 && gtk_widget_get_visible (priv->child1) && gtk_widget_get_child_visible (priv->child1))
gdk_window_show (priv->child1_window);
if (priv->child2 && gtk_widget_get_visible (priv->child2))
if (priv->child2 && gtk_widget_get_visible (priv->child2) && gtk_widget_get_child_visible (priv->child2))
gdk_window_show (priv->child2_window);
GTK_WIDGET_CLASS (gtk_paned_parent_class)->map (widget);
@ -1392,8 +1429,10 @@ gtk_paned_unmap (GtkWidget *widget)
gdk_window_hide (priv->handle);
gdk_window_hide (priv->child1_window);
gdk_window_hide (priv->child2_window);
if (gdk_window_is_visible (priv->child1_window))
gdk_window_hide (priv->child1_window);
if (gdk_window_is_visible (priv->child2_window))
gdk_window_hide (priv->child2_window);
GTK_WIDGET_CLASS (gtk_paned_parent_class)->unmap (widget);
}
@ -1863,25 +1902,25 @@ gtk_paned_remove (GtkContainer *container,
if (priv->child1 == widget)
{
if (priv->child1_window && gdk_window_is_visible (priv->child1_window))
gdk_window_hide (priv->child1_window);
gtk_widget_unparent (widget);
priv->child1 = NULL;
if (priv->child1_window)
gdk_window_hide (priv->child1_window);
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
}
else if (priv->child2 == widget)
{
if (priv->child2_window && gdk_window_is_visible (priv->child2_window))
gdk_window_hide (priv->child2_window);
gtk_widget_unparent (widget);
priv->child2 = NULL;
if (priv->child2_window)
gdk_window_hide (priv->child2_window);
if (was_visible && gtk_widget_get_visible (GTK_WIDGET (container)))
gtk_widget_queue_resize_no_redraw (GTK_WIDGET (container));
}
@ -2068,10 +2107,10 @@ gtk_paned_calc_position (GtkPaned *paned,
priv->max_position);
if (priv->child1)
gtk_widget_set_child_visible (priv->child1, priv->child1_size != 0);
gtk_paned_set_child_visible (paned, 0, priv->child1_size != 0);
if (priv->child2)
gtk_widget_set_child_visible (priv->child2, priv->child1_size != allocation);
gtk_paned_set_child_visible (paned, 1, priv->child1_size != allocation);
g_object_freeze_notify (G_OBJECT (paned));
if (priv->child1_size != old_position)