QmlDesigner: Fix crash on exit

QtCreator crashed on exit when the library/navigator/sidebar wasn't
visible in the Design mode. This is caused by a double deletion: The
widgets have the DesignModeWidget as the default parent + the side bar
items try to delete them on exit.

Fixed by removing default parent.

Task-number: QTCREATORBUG-1197
Reviewed-by: Christiaan Janssen
(cherry picked from commit db2fcdb4169dbd0b67f21912beb7878c5bd072a3)

1 files changed, 4 insertions, 3 deletions

diff --git a/src/plugins/qmldesigner/designmodewidget.cpp b/src/plugins/qmldesigner/designmodewidget.cpp
index ca22b3e35a..bb216c3deb 100644
--- a/src/plugins/qmldesigner/designmodewidget.cpp
+++ b/src/plugins/qmldesigner/designmodewidget.cpp
@@ -534,14 +534,15 @@ void DesignModeWidget::setup()
         }
     }
 
-    m_navigator = new NavigatorView(this);
+     // Sidebar takes ownership
+    m_navigator = new NavigatorView;
+    m_allPropertiesBox = new AllPropertiesBox;
+    m_itemLibrary = new ItemLibrary;
 
-    m_allPropertiesBox = new AllPropertiesBox(this);
     m_statesEditorWidget = new StatesEditorWidget(this);
     
     m_formEditorView = new FormEditorView(this);
 
-    m_itemLibrary = new ItemLibrary(this);
 
     m_designToolBar = new QToolBar;
     m_fakeToolBar = Core::EditorManager::createToolBar(this);