Use QPointer to detect object existence, less verbose debug messages

apps/opencs/view/render/commands.cpp

@@ -1,5 +1,7 @@
 #include "commands.hpp"
 
+#include <QPointer>
+
 #include <components/debug/debuglog.hpp>
 #include <components/esm/loadland.hpp>
 
@@ -15,26 +17,38 @@ CSVRender::DrawTerrainSelectionCommand::DrawTerrainSelectionCommand(WorldspaceWi
 
 void CSVRender::DrawTerrainSelectionCommand::redo()
 {
-    if (CSVRender::WorldspaceWidget* worldspaceWidget = dynamic_cast<CSVRender::WorldspaceWidget *> (mWorldspaceWidget))
+    if (mWorldspaceWidget)
     {
-        if (CSVRender::TerrainShapeMode* terrainMode = dynamic_cast<CSVRender::TerrainShapeMode *> (worldspaceWidget->getEditMode()) )
+        if (CSVRender::TerrainShapeMode* terrainMode = dynamic_cast<CSVRender::TerrainShapeMode *> (mWorldspaceWidget->getEditMode()) )
         {
             terrainMode->getTerrainSelection()->update();
             return;
         }
+        else
+        {
+            Log(Debug::Verbose) << "Can't update terrain selection in current EditMode";
+            return;
+        }
     }
-    Log(Debug::Warning) << "Error in redoing terrain selection";
+    else
+        Log(Debug::Verbose) << "Can't update terrain selection, no WorldspaceWidget found!";
 }
 
 void CSVRender::DrawTerrainSelectionCommand::undo()
 {
-    if (CSVRender::WorldspaceWidget* worldspaceWidget = dynamic_cast<CSVRender::WorldspaceWidget *> (mWorldspaceWidget))
+    if (mWorldspaceWidget)
     {
-        if (CSVRender::TerrainShapeMode* terrainMode = dynamic_cast<CSVRender::TerrainShapeMode *> (worldspaceWidget->getEditMode()) )
+        if (CSVRender::TerrainShapeMode* terrainMode = dynamic_cast<CSVRender::TerrainShapeMode *> (mWorldspaceWidget->getEditMode()) )
         {
             terrainMode->getTerrainSelection()->update();
             return;
         }
+        else
+        {
+            Log(Debug::Verbose) << "Can't undo terrain selection in current EditMode";
+            return;
+        }
     }
-    Log(Debug::Warning) << "Error in undoing terrain selection";
+    else
+        Log(Debug::Verbose) << "Can't undo terrain selection, no WorldspaceWidget found!";
 }

apps/opencs/view/render/commands.hpp

@@ -1,6 +1,8 @@
 #ifndef CSV_RENDER_COMMANDS_HPP
 #define CSV_RENDER_COMMANDS_HPP
 
+#include <QPointer>
+
 #include <QUndoCommand>
 
 #include "worldspacewidget.hpp"
@@ -23,10 +25,9 @@ namespace CSVRender
     */
     class DrawTerrainSelectionCommand : public QUndoCommand
     {
-        friend class WorldspaceWidget;
 
     private:
-        WorldspaceWidget *mWorldspaceWidget;
+        QPointer<WorldspaceWidget> mWorldspaceWidget;
 
     public:
         DrawTerrainSelectionCommand(WorldspaceWidget* worldspaceWidget, QUndoCommand* parent = nullptr);