Merge branch 'terrainselectioncrashfix' into 'openmw-47'

Fix terrain selection crash

See merge request OpenMW/openmw!1165

(cherry picked from commit ec4e3b04a7)

b84e41bd Avoid storing ref, dynamic cast worldspacewidget for safety
d62ddc00 Use QPointer to detect object existence, less verbose debug messages
cb42b528 Remove friend, make getEditMode public to allow editmode testing.
4b148180 Restucture code
08f7c73e Fix text

apps/opencs/view/render/commands.cpp

@@ -1,19 +1,44 @@
 #include "commands.hpp"
 
+#include <QPointer>
+
+#include <components/debug/debuglog.hpp>
 #include <components/esm/loadland.hpp>
 
+#include "editmode.hpp"
 #include "terrainselection.hpp"
+#include "terrainshapemode.hpp"
+#include "terraintexturemode.hpp"
+#include "worldspacewidget.hpp"
 
-CSVRender::DrawTerrainSelectionCommand::DrawTerrainSelectionCommand(TerrainSelection& terrainSelection, QUndoCommand* parent)
+CSVRender::DrawTerrainSelectionCommand::DrawTerrainSelectionCommand(WorldspaceWidget* worldspaceWidget, QUndoCommand* parent)
-    : mTerrainSelection(terrainSelection)
+    : mWorldspaceWidget(worldspaceWidget)
 { }
 
 void CSVRender::DrawTerrainSelectionCommand::redo()
 {
-    mTerrainSelection.update();
+    tryUpdate();
 }
 
 void CSVRender::DrawTerrainSelectionCommand::undo()
 {
-    mTerrainSelection.update();
+    tryUpdate();
+}
+
+void CSVRender::DrawTerrainSelectionCommand::tryUpdate()
+{
+    if (!mWorldspaceWidget)
+    {
+        Log(Debug::Verbose) << "Can't update terrain selection, no WorldspaceWidget found!";
+        return;
+    }
+
+    auto terrainMode = dynamic_cast<CSVRender::TerrainShapeMode*>(mWorldspaceWidget->getEditMode());
+    if (!terrainMode)
+    {
+        Log(Debug::Verbose) << "Can't update terrain selection in current EditMode";
+        return;
+    }
+
+    terrainMode->getTerrainSelection()->update();
 }

apps/opencs/view/render/commands.hpp

@@ -1,8 +1,12 @@
 #ifndef CSV_RENDER_COMMANDS_HPP
 #define CSV_RENDER_COMMANDS_HPP
 
+#include <QPointer>
+
 #include <QUndoCommand>
 
+#include "worldspacewidget.hpp"
+
 namespace CSVRender
 {
     class TerrainSelection;
@@ -21,14 +25,17 @@ namespace CSVRender
     */
     class DrawTerrainSelectionCommand : public QUndoCommand
     {
+
     private:
-        TerrainSelection& mTerrainSelection;
+        QPointer<WorldspaceWidget> mWorldspaceWidget;
 
     public:
-        DrawTerrainSelectionCommand(TerrainSelection& terrainSelection, QUndoCommand* parent = nullptr);
+        DrawTerrainSelectionCommand(WorldspaceWidget* worldspaceWidget, QUndoCommand* parent = nullptr);
 
         void redo() override;
         void undo() override;
+
+        void tryUpdate();
     };
 }
 

apps/opencs/view/render/terrainshapemode.cpp

@@ -287,7 +287,7 @@ void CSVRender::TerrainShapeMode::applyTerrainEditChanges()
     undoStack.beginMacro ("Edit shape and normal records");
 
     // One command at the beginning of the macro for redrawing the terrain-selection grid when undoing the changes.
-    undoStack.push(new DrawTerrainSelectionCommand(*mTerrainShapeSelection));
+    undoStack.push(new DrawTerrainSelectionCommand(&getWorldspaceWidget()));
 
     for(CSMWorld::CellCoordinates cellCoordinates: mAlteredCells)
     {
@@ -358,7 +358,7 @@ void CSVRender::TerrainShapeMode::applyTerrainEditChanges()
         pushNormalsEditToCommand(landNormalsNew, document, landTable, cellId);
     }
     // One command at the end of the macro for redrawing the terrain-selection grid when redoing the changes.
-    undoStack.push(new DrawTerrainSelectionCommand(*mTerrainShapeSelection));
+    undoStack.push(new DrawTerrainSelectionCommand(&getWorldspaceWidget()));
 
     undoStack.endMacro();
     clearTransientEdits();
@@ -1444,6 +1444,11 @@ void CSVRender::TerrainShapeMode::mouseMoveEvent (QMouseEvent *event)
         mBrushDraw->hide();
 }
 
+std::shared_ptr<CSVRender::TerrainSelection> CSVRender::TerrainShapeMode::getTerrainSelection()
+{
+    return mTerrainShapeSelection;
+}
+
 void CSVRender::TerrainShapeMode::setBrushSize(int brushSize)
 {
     mBrushSize = brushSize;

apps/opencs/view/render/terrainshapemode.hpp

@@ -92,6 +92,8 @@ namespace CSVRender
             void dragMoveEvent (QDragMoveEvent *event) override;
             void mouseMoveEvent (QMouseEvent *event) override;
 
+            std::shared_ptr<TerrainSelection> getTerrainSelection();
+
         private:
 
             /// Remove duplicates and sort mAlteredCells, then limitAlteredHeights forward and reverse
@@ -176,7 +178,7 @@ namespace CSVRender
             int mDragMode = InteractionType_None;
             osg::Group* mParentNode;
             bool mIsEditing = false;
-            std::unique_ptr<TerrainSelection> mTerrainShapeSelection;
+            std::shared_ptr<TerrainSelection> mTerrainShapeSelection;
             int mTotalDiffY = 0;
             std::vector<CSMWorld::CellCoordinates> mAlteredCells;
             osg::Vec3d mEditingPos;

apps/opencs/view/render/terraintexturemode.cpp

@@ -712,6 +712,11 @@ void CSVRender::TerrainTextureMode::mouseMoveEvent (QMouseEvent *event)
         mBrushDraw->hide();
 }
 
+std::shared_ptr<CSVRender::TerrainSelection> CSVRender::TerrainTextureMode::getTerrainSelection()
+{
+    return mTerrainTextureSelection;
+}
+
 
 void CSVRender::TerrainTextureMode::setBrushSize(int brushSize)
 {

apps/opencs/view/render/terraintexturemode.hpp

@@ -85,6 +85,8 @@ namespace CSVRender
 
             void mouseMoveEvent (QMouseEvent *event) override;
 
+            std::shared_ptr<TerrainSelection> getTerrainSelection();
+
         private:
             /// \brief Handle brush mechanics, maths regarding worldspace hit etc.
             void editTerrainTextureGrid (const WorldspaceHitResult& hit);
@@ -115,7 +117,7 @@ namespace CSVRender
             int mDragMode;
             osg::Group* mParentNode;
             bool mIsEditing;
-            std::unique_ptr<TerrainSelection> mTerrainTextureSelection;
+            std::shared_ptr<TerrainSelection> mTerrainTextureSelection;
 
             const int cellSize {ESM::Land::REAL_SIZE};
             const int landTextureSize {ESM::Land::LAND_TEXTURE_SIZE};

apps/opencs/view/render/worldspacewidget.cpp

@@ -452,6 +452,11 @@ CSVRender::WorldspaceHitResult CSVRender::WorldspaceWidget::mousePick (const QPo
     return hit;
 }
 
+CSVRender::EditMode *CSVRender::WorldspaceWidget::getEditMode()
+{
+    return dynamic_cast<CSVRender::EditMode *> (mEditMode->getCurrent());
+}
+
 void CSVRender::WorldspaceWidget::abortDrag()
 {
     if (mDragging)
@@ -697,11 +702,6 @@ void CSVRender::WorldspaceWidget::handleInteractionPress (const WorldspaceHitRes
         editMode.primaryOpenPressed (hit);
 }
 
-CSVRender::EditMode *CSVRender::WorldspaceWidget::getEditMode()
-{
-    return dynamic_cast<CSVRender::EditMode *> (mEditMode->getCurrent());
-}
-
 void CSVRender::WorldspaceWidget::primaryOpen(bool activate)
 {
     handleInteraction(InteractionType_PrimaryOpen, activate);

apps/opencs/view/render/worldspacewidget.hpp

@@ -189,6 +189,8 @@ namespace CSVRender
             /// Erase all overrides and restore the visual representation to its true state.
             virtual void reset (unsigned int elementMask) = 0;
 
+            EditMode *getEditMode();
+
         protected:
 
             /// Visual elements in a scene
@@ -215,8 +217,6 @@ namespace CSVRender
 
             void settingChanged (const CSMPrefs::Setting *setting) override;
 
-            EditMode *getEditMode();
-
             bool getSpeedMode();
 
         private: