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widget: Avoid a crash in crossing event handling

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We need to make sure that the crossing data stays
alive until we are done handling it, so take references
on all the widgets in it.
This commit is contained in:
Matthias Clasen 2020-08-26 07:24:54 -04:00
parent eef1818cee
commit 44741e1b77
1 changed files with 18 additions and 0 deletions
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18
gtk/gtkwidget.c
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@ -4376,12 +4376,30 @@ gtk_widget_handle_crossing (GtkWidget *widget,
g_object_ref (widget);
if (crossing->old_target)
g_object_ref (crossing->old_target);
if (crossing->new_target)
g_object_ref (crossing->new_target);
if (crossing->old_descendent)
g_object_ref (crossing->old_descendent);
if (crossing->new_descendent)
g_object_ref (crossing->new_descendent);
for (l = priv->event_controllers; l; l = l->next)
{
GtkEventController *controller = l->data;
gtk_event_controller_handle_crossing (controller, crossing, x, y);
}
if (crossing->old_target)
g_object_unref (crossing->old_target);
if (crossing->new_target)
g_object_unref (crossing->new_target);
if (crossing->old_descendent)
g_object_unref (crossing->old_descendent);
if (crossing->new_descendent)
g_object_unref (crossing->new_descendent);
g_object_unref (widget);
}