First draft of undo/redo. Can move objects and undo new object placement.

Signed-off-by: Tomasz Zieliński <tomaszzielinskijedenzwielu@gmail.com>

lib/mapping/CMapEditManager.cpp

@@ -155,14 +155,17 @@ MapRect CMapOperation::extendTileAroundSafely(const int3 & centerPos) const
 }
 
 
-CMapUndoManager::CMapUndoManager() : undoRedoLimit(10)
+CMapUndoManager::CMapUndoManager() :
+	undoRedoLimit(10),
+	undoCallback([](bool, bool) {})
 {
-
+	//TODO: unlimited undo
 }
 
 void CMapUndoManager::undo()
 {
 	doOperation(undoStack, redoStack, true);
+
 }
 
 void CMapUndoManager::redo()
@@ -174,6 +177,7 @@ void CMapUndoManager::clearAll()
 {
 	undoStack.clear();
 	redoStack.clear();
+	onUndoRedo();
 }
 
 int CMapUndoManager::getUndoRedoLimit() const
@@ -219,6 +223,7 @@ void CMapUndoManager::doOperation(TStack & fromStack, TStack & toStack, bool doU
 	}
 	toStack.push_front(std::move(operation));
 	fromStack.pop_front();
+	onUndoRedo();
 }
 
 const CMapOperation * CMapUndoManager::peek(const TStack & stack) const
@@ -227,6 +232,18 @@ const CMapOperation * CMapUndoManager::peek(const TStack & stack) const
 	return stack.front().get();
 }
 
+void CMapUndoManager::onUndoRedo()
+{
+	//true if there's anything on the stack
+	undoCallback((bool)peekUndo(), (bool)peekRedo());
+}
+
+void CMapUndoManager::setUndoCallback(std::function<void(bool, bool)> functor)
+{
+	undoCallback = functor;
+	onUndoRedo(); //inform immediately
+}
+
 CMapEditManager::CMapEditManager(CMap * map)
 	: map(map), terrainSel(map), objectSel(map)
 {
@@ -322,6 +339,7 @@ void CComposedOperation::undo()
 
 void CComposedOperation::redo()
 {
+	//TODO: double-chekcif the order is correct
 	for(auto & operation : operations)
 	{
 		operation->redo();
@@ -1070,7 +1088,7 @@ void CInsertObjectOperation::execute()
 
 void CInsertObjectOperation::undo()
 {
-	//TODO
+	map->removeObject(obj);
 }
 
 void CInsertObjectOperation::redo()
@@ -1083,20 +1101,24 @@ std::string CInsertObjectOperation::getLabel() const
 	return "Insert Object";
 }
 
-CMoveObjectOperation::CMoveObjectOperation(CMap * map, CGObjectInstance * obj, const int3 & position)
-	: CMapOperation(map), obj(obj), pos(position)
+CMoveObjectOperation::CMoveObjectOperation(CMap * map, CGObjectInstance * obj, const int3 & targetPosition)
+	: CMapOperation(map),
+	obj(obj),
+	initialPos(obj->pos),
+	targetPos(targetPosition)
 {
-
 }
 
 void CMoveObjectOperation::execute()
 {
-	map->moveObject(obj, pos);
+	map->moveObject(obj, targetPos);
+	logGlobal->debug("Moved object %s to position %s", obj->instanceName, targetPos.toString());
 }
 
 void CMoveObjectOperation::undo()
 {
-	//TODO
+	map->moveObject(obj, initialPos);
+	logGlobal->debug("Moved object %s back to position %s", obj->instanceName, initialPos.toString());
 }
 
 void CMoveObjectOperation::redo()

lib/mapping/CMapEditManager.h

@@ -138,6 +138,8 @@ public:
 
 	/// The undo redo limit is a number which says how many undo/redo items can be saved. The default
 	/// value is 10. If the value is 0, no undo/redo history will be maintained.
+	
+	/// FIXME: unlimited undo please
 	int getUndoRedoLimit() const;
 	void setUndoRedoLimit(int value);
 
@@ -146,6 +148,9 @@ public:
 
 	void addOperation(std::unique_ptr<CMapOperation> && operation); /// Client code does not need to call this method.
 
+	//poor man's signal
+	void setUndoCallback(std::function<void(bool, bool)> functor);
+
 private:
 	typedef std::list<std::unique_ptr<CMapOperation> > TStack;
 
@@ -155,6 +160,9 @@ private:
 	TStack undoStack;
 	TStack redoStack;
 	int undoRedoLimit;
+
+	void onUndoRedo();
+	std::function<void(bool allowUndo, bool allowRedo)> undoCallback;
 };
 
 /// The map edit manager provides functionality for drawing terrain and placing
@@ -425,7 +433,7 @@ private:
 class CMoveObjectOperation : public CMapOperation
 {
 public:
-	CMoveObjectOperation(CMap * map, CGObjectInstance * obj, const int3 & position);
+	CMoveObjectOperation(CMap * map, CGObjectInstance * obj, const int3 & targetPosition);
 
 	void execute() override;
 	void undo() override;
@@ -434,7 +442,8 @@ public:
 
 private:
 	CGObjectInstance * obj;
-	int3 pos;
+	int3 initialPos;
+	int3 targetPos;
 };
 
 /// The CRemoveObjectOperation class removes object from the map

mapeditor/mainwindow.cpp

@@ -554,6 +554,28 @@ void MainWindow::on_actionLevel_triggered()
 	}
 }
 
+void MainWindow::on_actionUndo_triggered()
+{
+	QString str("Undo clicked");
+	statusBar()->showMessage(str, 1000);
+
+	if (controller.map())
+	{
+		controller.undo();
+	}
+}
+
+void MainWindow::on_actionRedo_triggered()
+{
+	QString str("Redo clicked");
+	statusBar()->showMessage(str, 1000);
+
+	if (controller.map())
+	{
+		controller.redo();
+	}
+}
+
 void MainWindow::on_actionPass_triggered(bool checked)
 {
 	if(controller.map())
@@ -769,3 +791,12 @@ void MainWindow::on_actionPlayers_settings_triggered()
 	mapSettingsDialog->setModal(true);
 }
 
+void MainWindow::enableUndo(bool enable)
+{
+	ui->actionUndo->setEnabled(enable);
+}
+
+void MainWindow::enableRedo(bool enable)
+{
+	ui->actionRedo->setEnabled(enable);
+}

mapeditor/mainwindow.h

@@ -48,6 +48,10 @@ private slots:
 	void on_actionLevel_triggered();
 
 	void on_actionSave_triggered();
+	
+	void on_actionUndo_triggered();
+
+	void on_actionRedo_triggered();
 
 	void on_actionPass_triggered(bool checked);
 
@@ -84,6 +88,8 @@ public slots:
 	void treeViewSelected(const QModelIndex &selected, const QModelIndex &deselected);
 	void loadInspector(CGObjectInstance * obj);
 	void mapChanged();
+	void enableUndo(bool enable);
+	void enableRedo(bool enable);
 
 private:
 	void preparePreview(const QModelIndex &index, bool createNew);

mapeditor/mainwindow.ui

@@ -51,7 +51,7 @@
      <x>0</x>
      <y>0</y>
      <width>1024</width>
-     <height>22</height>
+     <height>18</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -70,7 +70,15 @@
     <addaction name="actionMapSettings"/>
     <addaction name="actionPlayers_settings"/>
    </widget>
+   <widget class="QMenu" name="menuEdit">
+    <property name="title">
+     <string>Edit</string>
+    </property>
+    <addaction name="actionUndo"/>
+    <addaction name="actionRedo"/>
+   </widget>
    <addaction name="menuFile"/>
+   <addaction name="menuEdit"/>
    <addaction name="menuMap"/>
   </widget>
   <widget class="QToolBar" name="toolBar">
@@ -647,7 +655,7 @@
           <x>0</x>
           <y>0</y>
           <width>128</width>
-          <height>271</height>
+          <height>356</height>
          </rect>
         </property>
         <property name="sizePolicy">
@@ -690,7 +698,7 @@
           <x>0</x>
           <y>0</y>
           <width>128</width>
-          <height>271</height>
+          <height>356</height>
          </rect>
         </property>
         <property name="sizePolicy">
@@ -709,7 +717,7 @@
           <x>0</x>
           <y>0</y>
           <width>128</width>
-          <height>271</height>
+          <height>356</height>
          </rect>
         </property>
         <property name="sizePolicy">
@@ -823,6 +831,37 @@
     <string>Players settings</string>
    </property>
   </action>
+  <action name="actionUndo">
+   <property name="enabled">
+    <bool>false</bool>
+   </property>
+   <property name="text">
+    <string>Undo</string>
+   </property>
+   <property name="iconText">
+    <string>Undo</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Z</string>
+   </property>
+   <property name="shortcutVisibleInContextMenu">
+    <bool>true</bool>
+   </property>
+  </action>
+  <action name="actionRedo">
+   <property name="enabled">
+    <bool>false</bool>
+   </property>
+   <property name="text">
+    <string>Redo</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+Y</string>
+   </property>
+   <property name="shortcutVisibleInContextMenu">
+    <bool>true</bool>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>
@@ -833,4 +872,8 @@
  </customwidgets>
  <resources/>
  <connections/>
+ <slots>
+  <signal>enableUndo(bool)</signal>
+  <signal>enableRedo(bool)</signal>
+ </slots>
 </ui>

mapeditor/mapcontroller.cpp

@@ -46,6 +46,13 @@ void MapController::setMap(std::unique_ptr<CMap> cmap)
 	_scenes[1].reset(new MapScene(1));
 	resetMapHandler();
 	sceneForceUpdate();
+
+	_map->getEditManager()->getUndoManager().setUndoCallback([this](bool allowUndo, bool allowRedo)
+		{
+			main->enableUndo(allowUndo);
+			main->enableRedo(allowRedo);
+		}
+	);
 }
 
 void MapController::sceneForceUpdate()
@@ -211,3 +218,19 @@ void MapController::commitObjectCreate(int level)
 	
 	main->mapChanged();
 }
+
+void MapController::undo()
+{
+	_map->getEditManager()->getUndoManager().undo();
+	resetMapHandler();
+	sceneForceUpdate();
+	main->mapChanged();
+}
+
+void MapController::redo()
+{
+	_map->getEditManager()->getUndoManager().redo();
+	resetMapHandler();
+	sceneForceUpdate();
+	main->mapChanged();
+}

mapeditor/mapcontroller.h

@@ -27,6 +27,7 @@ public:
 	void sceneForceUpdate(int level);
 	
 	void commitTerrainChange(int level, const Terrain & terrain);
+	void commitObjectErase(const CGObjectInstance* obj);
 	void commitObjectErase(int level);
 	void commitObstacleFill(int level);
 	void commitChangeWithoutRedraw();
@@ -36,6 +37,9 @@ public:
 	
 	bool discardObject(int level) const;
 	void createObject(int level, CGObjectInstance * obj) const;
+
+	void undo();
+	void redo();
 	
 private:
 	std::unique_ptr<CMap> _map;