ctkPopupWidget fires signals when opened/closed

Libs/Widgets/ctkPopupWidget.cpp

@@ -606,10 +606,12 @@ void ctkPopupWidget::onEffectFinished()
   if (qobject_cast<QAbstractAnimation*>(this->sender())->direction() == QAbstractAnimation::Backward)
     {
     this->hide();
+    emit this->popupOpened(false);
     }
   else
     {
     this->show();
+    emit this->popupOpened(true);
     }
 }
 

Libs/Widgets/ctkPopupWidget.h

@@ -140,6 +140,9 @@ public slots:
   /// It is typically connected with a checkable button to anchor the popup.
   void pinPopup(bool pin);
 
+signals:
+  void popupOpened(bool open);
+
 protected:
   QScopedPointer<ctkPopupWidgetPrivate> d_ptr;
   Q_PROPERTY(double effectAlpha READ effectAlpha WRITE setEffectAlpha DESIGNABLE false)