concretize type in request for RealSpace

GUI/Model/Sample/SampleItem.h

@@ -35,6 +35,8 @@ public:
     //! #baMigration only for migration; remove after finished SampleModel migration
     SampleItem(SessionItem* item);
 
+    template <typename T> SampleItem(T* item) : base(item) {}
+
     //! Short version to get a contained pointer (the std::get_if would return pointer-to-pointer)
     template <typename T> T get_if()
     {

GUI/View/SampleDesigner/LayerOrientedSampleEditor.h

@@ -37,7 +37,7 @@ public:
     void setCurrentSample(MultiLayerItem* multiLayerItem);
 
 signals:
-    void requestViewInRealSpace(SessionItem* itemToShow);
+    void requestViewInRealSpace(SampleItem itemToShow);
     void requestCreateNewSample();
     void aboutToRemoveItem(SampleItem item);
     void modified();

GUI/View/SampleDesigner/SampleEditorController.h

@@ -108,7 +108,7 @@ public:
     void onStoppedToMoveLayer(QWidget* widgetToMove, QWidget* moveAboveThisWidget);
 
 signals:
-    void requestViewInRealSpace(SessionItem* itemToShow);
+    void requestViewInRealSpace(SampleItem item);
     void aboutToRemoveItem(SampleItem item);
     void modified();
 

GUI/View/SampleDesigner/SampleView.cpp

@@ -111,19 +111,16 @@ void SampleView::updateSingleSampleMode()
     m_docks->setDockVisible(SAMPLE_LIST, !m_document->singleSampleMode());
 }
 
-void SampleView::onRequestViewInRealSpace(SessionItem* itemToView)
+void SampleView::onRequestViewInRealSpace(SampleItem itemToView)
 {
-    if (!itemToView)
-        return;
-
     RealSpaceCanvas::ItemForRealSpace itemForRealSpace;
-    if (auto* p = dynamic_cast<MultiLayerItem*>(itemToView))
+    if (auto* p = itemToView.get_if<MultiLayerItem*>())
         itemForRealSpace = p;
-    else if (auto* p = dynamic_cast<LayerItem*>(itemToView))
+    else if (auto* p = itemToView.get_if<LayerItem*>())
         itemForRealSpace = p;
-    else if (auto* p = dynamic_cast<ParticleLayoutItem*>(itemToView))
+    else if (auto* p = itemToView.get_if<ParticleLayoutItem*>())
         itemForRealSpace = p;
-    else if (auto* p = dynamic_cast<ItemWithParticles*>(itemToView))
+    else if (auto* p = itemToView.get_if<ItemWithParticles*>())
         itemForRealSpace = p;
     else
         return;

GUI/View/SampleDesigner/SampleView.h

@@ -41,7 +41,7 @@ private:
     //! Show the item in the real space view
     //!
     //! If the real space view is not visible at the moment, it will be shown.
-    void onRequestViewInRealSpace(SessionItem* itemToView);
+    void onRequestViewInRealSpace(SampleItem itemToView);
 
     void onAboutToRemoveItem(SampleItem item);