QmlJSEditor: extending IContextPane with a signal

closed() is emitted when the pane is hidden/closed.

src/libs/qmleditorwidgets/contextpanewidget.cpp

@@ -363,6 +363,7 @@ void ContextPaneWidget::onTogglePane()
         setLineButton();
     } else {
         deactivate();
+        emit closed();
     }
 }
 

src/libs/qmleditorwidgets/contextpanewidget.h

@@ -100,6 +100,7 @@ signals:
     void removeAndChangeProperty(const QString &, const QString &, const QVariant &, bool);
     void pinnedChanged(bool);
     void enabledChanged(bool);
+    void closed();
 
 private slots:
     void onDisable(bool);

src/libs/qmljs/qmljsicontextpane.h

@@ -56,6 +56,8 @@ public:
     virtual void setEnabled(bool) = 0;
     virtual bool isAvailable(TextEditor::BaseTextEditorEditable *editor, Document::Ptr doc, const QmlJS::Snapshot &snapshot, AST::Node *node) = 0;
     virtual QWidget* widget() = 0;
+signals:
+    void closed();
 };
 
 } // namespace QmlJS

src/plugins/qmljseditor/quicktoolbar.cpp

@@ -367,6 +367,7 @@ ContextPaneWidget* QuickToolBar::contextWidget()
         connect(m_widget.data(), SIGNAL(removeAndChangeProperty(QString,QString,QVariant, bool)), this, SLOT(onPropertyRemovedAndChange(QString,QString,QVariant, bool)));
         connect(m_widget.data(), SIGNAL(enabledChanged(bool)), this, SLOT(onEnabledChanged(bool)));
         connect(m_widget.data(), SIGNAL(pinnedChanged(bool)), this, SLOT(onPinnedChanged(bool)));
+        connect(m_widget.data(), SIGNAL(closed()), this, SIGNAL(closed()));
     }
     return m_widget.data();
 }