QmlDesigner: crash fix

The subcomponent manager populates the item library.
This means the ItemLibraryView has to be properly
initialized before we call m_subComponentManager->update().

I added a helper function and call it from activateAutoSynchronization(),
after all views have been attached.

Change-Id: Ie802f93c7d0a76b42160d4a92e8448e900380b71
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>

src/plugins/qmldesigner/components/integration/designdocument.cpp

@@ -392,7 +392,6 @@ void DesignDocument::activateCurrentModel(TextModifier *textModifier)
 //        m_formEditorView->crumblePath()->pushElement(simplfiedDisplayName(), createCrumbleBarInfo());
 
     m_documentLoaded = true;
-    m_subComponentManager->update(QUrl::fromLocalFile(fileName()), m_currentModel->imports());
     Q_ASSERT(m_documentModel);
     QApplication::restoreOverrideCursor();
 }
@@ -407,6 +406,7 @@ void DesignDocument::activateCurrentModel()
 
 void DesignDocument::activateDocumentModel()
 {
+    //this function seems to be unused!
     QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
 
     Q_ASSERT(m_documentModel);
@@ -417,7 +417,9 @@ void DesignDocument::activateDocumentModel()
 
     m_currentModel = m_documentModel;
     m_documentLoaded = true;
-    m_subComponentManager->update(QUrl::fromLocalFile(fileName()), m_currentModel->imports());
+
+    updateSubcomponentManager();
+
     Q_ASSERT(m_documentModel);
     QApplication::restoreOverrideCursor();
 }
@@ -443,6 +445,12 @@ void DesignDocument::close()
     emit designDocumentClosed();
 }
 
+void DesignDocument::updateSubcomponentManager()
+{
+    Q_ASSERT(m_subComponentManager);
+    m_subComponentManager->update(QUrl::fromLocalFile(fileName()), m_currentModel->imports());
+}
+
 void DesignDocument::deleteSelected()
 {
     if (!m_currentModel)

src/plugins/qmldesigner/components/integration/designdocument.h

@@ -82,6 +82,7 @@ public:
     void activateCurrentModel();
     void activateDocumentModel();
     void close();
+    void updateSubcomponentManager();
 
     bool isUndoAvailable() const;
     bool isRedoAvailable() const;

src/plugins/qmldesigner/qmldesignerplugin.cpp

@@ -302,6 +302,7 @@ void QmlDesignerPlugin::activateAutoSynchronization()
         m_mainWidget->showErrorMessage(errors);
     }
 
+    currentDesignDocument()->updateSubcomponentManager();
 
     connect(currentDesignDocument()->rewriterView(),
             SIGNAL(errorsChanged(QList<RewriterView::Error>)),