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stack: Only map children when necessary

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gtk_widget_set_parent() will map the widget if the parent is mapped
and the widget is both visible and child-visible. As we currently
only set the child visibility after adding the child, we immediately
map all children that are added to a mapped stack, even when they
are not actually shown. Avoid this by setting the child visibility
before adding the child, so widgets are only mapped when shown.

https://bugzilla.gnome.org/show_bug.cgi?id=766737
This commit is contained in:
Florian Müllner 2016-05-21 00:07:10 +02:00
parent 386ead4243
commit 57efcabfd6
1 changed files with 1 additions and 2 deletions
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3
gtk/gtkstack.c
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@ -1266,6 +1266,7 @@ gtk_stack_add (GtkContainer *container,
priv->children = g_list_append (priv->children, child_info);
gtk_widget_set_child_visible (child, FALSE);
gtk_widget_set_parent_window (child, priv->bin_window);
gtk_widget_set_parent (child, GTK_WIDGET (stack));
@ -1282,8 +1283,6 @@ gtk_stack_add (GtkContainer *container,
if (priv->visible_child == NULL &&
gtk_widget_get_visible (child))
set_visible_child (stack, child_info, priv->transition_type, priv->transition_duration);
else
gtk_widget_set_child_visible (child, FALSE);
if (priv->hhomogeneous || priv->vhomogeneous || priv->visible_child == child_info)
gtk_widget_queue_resize (GTK_WIDGET (stack));