Undo-redo stack for eraising operations and Sankore 834

src/adaptors/UBSvgSubsetAdaptor.cpp

@@ -1084,7 +1084,7 @@ QGraphicsItem *UBSvgSubsetAdaptor::UBSvgSubsetReader::readElementFromGroup()
 {
     QGraphicsItem *result = 0;
 
-    result = mScene->itemByUuid(QUuid(mXmlReader.attributes().value(aId).toString()));
+    result = mScene->itemForUuid(QUuid(mXmlReader.attributes().value(aId).toString()));
 
     mXmlReader.skipCurrentElement();
     mXmlReader.readNext();

src/domain/UBGraphicsGroupContainerItem.cpp

@@ -125,6 +125,8 @@ void UBGraphicsGroupContainerItem::removeFromGroup(QGraphicsItem *item)
 
     pRemoveFromGroup(item);
 
+    item->setFlags(ItemIsSelectable | ItemIsFocusable);
+
 }
 
 void UBGraphicsGroupContainerItem::deselectCurrentItem()
@@ -219,7 +221,7 @@ void UBGraphicsGroupContainerItem::setUuid(const QUuid &pUuid)
     setData(UBGraphicsItemData::ItemUuid, QVariant(pUuid)); //store item uuid inside the QGraphicsItem to fast operations with Items on the scene
 }
 
-void UBGraphicsGroupContainerItem::destroy() {
+void UBGraphicsGroupContainerItem::destroy(bool canUndo) {
 
     foreach (QGraphicsItem *item, childItems()) {
         pRemoveFromGroup(item);
@@ -227,7 +229,7 @@ void UBGraphicsGroupContainerItem::destroy() {
         item->setFlag(QGraphicsItem::ItemIsFocusable, true);
     }
 
-    remove();
+    mDelegate->remove(canUndo);
 }
 
 void UBGraphicsGroupContainerItem::clearSource()

src/domain/UBGraphicsGroupContainerItem.h

@@ -37,7 +37,7 @@ public:
     }
 
     virtual void setUuid(const QUuid &pUuid);
-    void destroy();
+    void destroy(bool canUndo = true);
 
     virtual void clearSource();
 

src/domain/UBGraphicsItemGroupUndoCommand.cpp

@@ -22,7 +22,7 @@ UBGraphicsItemGroupUndoCommand::~UBGraphicsItemGroupUndoCommand()
 
 void UBGraphicsItemGroupUndoCommand::undo()
 {
-    mGroup->destroy();
+    mGroup->destroy(false);
     foreach(QGraphicsItem *item, mItems) {
         item->setSelected(true);
     }
@@ -41,7 +41,7 @@ void UBGraphicsItemGroupUndoCommand::redo()
             QList<QGraphicsItem*> childItems = item->childItems();
             UBGraphicsGroupContainerItem *currentGroup = dynamic_cast<UBGraphicsGroupContainerItem*>(item);
             if (currentGroup) {
-                currentGroup->destroy();
+                currentGroup->destroy(false);
             }
             foreach (QGraphicsItem *chItem, childItems) {
                 mGroup->addToGroup(chItem);

src/domain/UBGraphicsItemUndoCommand.cpp

@@ -27,10 +27,11 @@
 #include "domain/UBGraphicsGroupContainerItem.h"
 
 UBGraphicsItemUndoCommand::UBGraphicsItemUndoCommand(UBGraphicsScene* pScene, const QSet<QGraphicsItem*>& pRemovedItems,
-        const QSet<QGraphicsItem*>& pAddedItems)
+                                                     const QSet<QGraphicsItem*>& pAddedItems, const QMultiMap<UBGraphicsGroupContainerItem*, QUuid> &groupsMap)
     : mScene(pScene)
     , mRemovedItems(pRemovedItems - pAddedItems)
     , mAddedItems(pAddedItems - pRemovedItems)
+    , mExcludedFromGroup(groupsMap)
 {
     mFirstRedo = true;
 
@@ -110,6 +111,36 @@ void UBGraphicsItemUndoCommand::undo()
         }
     }
 
+    QMapIterator<UBGraphicsGroupContainerItem*, QUuid> curMapElement(mExcludedFromGroup);
+    UBGraphicsGroupContainerItem *nextGroup = 0;
+    UBGraphicsGroupContainerItem *previousGroupItem;
+    bool groupChanged = false;
+
+    while (curMapElement.hasNext()) {
+        curMapElement.next();
+
+        groupChanged = previousGroupItem != curMapElement.key();
+        //trying to find the group on the scene;
+        if (!nextGroup || groupChanged) {
+            UBGraphicsGroupContainerItem *groupCandidate = curMapElement.key();
+            if (groupCandidate) {
+                nextGroup = groupCandidate;
+                if(!mScene->items().contains(nextGroup)) {
+                    mScene->addItem(nextGroup);
+                }
+                nextGroup->setVisible(true);
+            }
+        }
+
+        QGraphicsItem *groupedItem = mScene->itemForUuid(curMapElement.value());
+        if (groupedItem) {
+            nextGroup->addToGroup(groupedItem);
+        }
+
+        previousGroupItem = curMapElement.key();
+        UBGraphicsItem::Delegate(nextGroup)->update();
+    }
+
     // force refresh, QT is a bit lazy and take a lot of time (nb item ^2 ?) to trigger repaint
     mScene->update(mScene->sceneRect());
 
@@ -125,6 +156,35 @@ void UBGraphicsItemUndoCommand::redo()
             return;
         }
 
+        QMapIterator<UBGraphicsGroupContainerItem*, QUuid> curMapElement(mExcludedFromGroup);
+        UBGraphicsGroupContainerItem *nextGroup = 0;
+        UBGraphicsGroupContainerItem *previousGroupItem;
+        bool groupChanged = false;
+
+        while (curMapElement.hasNext()) {
+            curMapElement.next();
+
+            groupChanged = previousGroupItem != curMapElement.key();
+            //trying to find the group on the scene;
+            if (!nextGroup || groupChanged) {
+                UBGraphicsGroupContainerItem *groupCandidate = curMapElement.key();
+                if (groupCandidate) {
+                    nextGroup = groupCandidate;
+                }
+            }
+            QGraphicsItem *groupedItem = mScene->itemForUuid(curMapElement.value());
+            if (groupedItem) {
+                if (nextGroup->childItems().count() == 1) {
+                    nextGroup->destroy(false);
+                    break;
+                }
+                nextGroup->removeFromGroup(groupedItem);
+            }
+
+            previousGroupItem = curMapElement.key();
+            UBGraphicsItem::Delegate(nextGroup)->update();
+        }
+
         QSetIterator<QGraphicsItem*> itRemoved(mRemovedItems);
         while (itRemoved.hasNext())
         {

src/domain/UBGraphicsItemUndoCommand.h

@@ -18,6 +18,7 @@
 
 #include <QtGui>
 #include "UBAbstractUndoCommand.h"
+#include "UBGraphicsGroupContainerItem.h"
 
 
 class UBGraphicsScene;
@@ -27,7 +28,7 @@ class UBGraphicsItemUndoCommand : public UBAbstractUndoCommand
 {
     public:
         UBGraphicsItemUndoCommand(UBGraphicsScene* pScene, const QSet<QGraphicsItem*>& pRemovedItems,
-                const QSet<QGraphicsItem*>& pAddedItems);
+                                  const QSet<QGraphicsItem*>& pAddedItems, const QMultiMap<UBGraphicsGroupContainerItem*, QUuid> &groupsMap = QMultiMap<UBGraphicsGroupContainerItem*, QUuid>());
 
         UBGraphicsItemUndoCommand(UBGraphicsScene* pScene, QGraphicsItem* pRemovedItem,
                         QGraphicsItem* pAddedItem);
@@ -47,6 +48,7 @@ class UBGraphicsItemUndoCommand : public UBAbstractUndoCommand
         UBGraphicsScene* mScene;
         QSet<QGraphicsItem*> mRemovedItems;
         QSet<QGraphicsItem*> mAddedItems;
+        QMultiMap<UBGraphicsGroupContainerItem*, QUuid> mExcludedFromGroup;
 
         bool mFirstRedo;
 };

src/domain/UBGraphicsScene.cpp

@@ -1067,6 +1067,7 @@ UBItem* UBGraphicsScene::deepCopy() const
 void UBGraphicsScene::clearContent(clearCase pCase)
 {
     QSet<QGraphicsItem*> removedItems;
+    QMultiMap<UBGraphicsGroupContainerItem*, QUuid> groupsMap;
 
     switch (pCase) {
     case clearBackground :
@@ -1106,8 +1107,13 @@ void UBGraphicsScene::clearContent(clearCase pCase)
             if(shouldDelete) {
                 if (itemGroup) {
                     itemGroup->removeFromGroup(item);
+                    groupsMap.insert(itemGroup, UBGraphicsItem::getOwnUuid(item));
                     if (itemGroup->childItems().count() == 1) {
-                        itemGroup->destroy();
+                        groupsMap.insert(itemGroup, UBGraphicsItem::getOwnUuid(itemGroup->childItems().first()));
+                        QGraphicsItem *lastItem = itemGroup->childItems().first();
+                        bool isSelected = itemGroup->isSelected();
+                        itemGroup->destroy(false);
+                        lastItem->setSelected(isSelected);
                     }
                     itemGroup->Delegate()->update();
                 }
@@ -1123,7 +1129,7 @@ void UBGraphicsScene::clearContent(clearCase pCase)
     update(sceneRect());
 
     if (enableUndoRedoStack) { //should be deleted after scene own undo stack implemented
-        UBGraphicsItemUndoCommand* uc = new UBGraphicsItemUndoCommand(this, removedItems, QSet<QGraphicsItem*>());
+        UBGraphicsItemUndoCommand* uc = new UBGraphicsItemUndoCommand(this, removedItems, QSet<QGraphicsItem*>(), groupsMap);
         UBApplication::undoStack->push(uc);
     }
 
@@ -1571,8 +1577,9 @@ void UBGraphicsScene::removeItem(QGraphicsItem* item)
 
 void UBGraphicsScene::removeItems(const QSet<QGraphicsItem*>& items)
 {
-    foreach(QGraphicsItem* item, items)
+    foreach(QGraphicsItem* item, items) {
         UBCoreGraphicsScene::removeItem(item);
+    }
 
     mItemCount -= items.size();
 
@@ -1665,7 +1672,7 @@ QRectF UBGraphicsScene::normalizedSceneRect(qreal ratio)
     return normalizedRect;
 }
 
-QGraphicsItem *UBGraphicsScene::itemByUuid(QUuid uuid)
+QGraphicsItem *UBGraphicsScene::itemForUuid(QUuid uuid)
 {
     QGraphicsItem *result = 0;
 

src/domain/UBGraphicsScene.h

@@ -174,7 +174,7 @@ class UBGraphicsScene: public UBCoreGraphicsScene, public UBItem
 
         QRectF normalizedSceneRect(qreal ratio = -1.0);
 
-        QGraphicsItem *itemByUuid(QUuid uuid);
+        QGraphicsItem *itemForUuid(QUuid uuid);
 
         void moveTo(const QPointF& pPoint);
         void drawLineTo(const QPointF& pEndPoint, const qreal& pWidth, bool bLineStyle);

src/domain/UBItem.cpp

@@ -54,6 +54,12 @@ bool UBGraphicsItem::isRotatable(QGraphicsItem *item)
     return item->data(UBGraphicsItemData::ItemRotatable).toBool();
 }
 
+QUuid UBGraphicsItem::getOwnUuid(QGraphicsItem *item)
+{
+    QString idCandidate = item->data(UBGraphicsItemData::ItemUuid).toString();
+    return idCandidate == QUuid().toString() ? QUuid() : QUuid(idCandidate);
+}
+
 UBGraphicsItemDelegate *UBGraphicsItem::Delegate(QGraphicsItem *pItem)
 {
     UBGraphicsItemDelegate *result = 0;

src/domain/UBItem.h

@@ -107,6 +107,7 @@ public:
     static void assignZValue(QGraphicsItem*, qreal value);
     static bool isRotatable(QGraphicsItem *item);
     static bool isFlippable(QGraphicsItem *item);
+    static QUuid getOwnUuid(QGraphicsItem *item);
 
     static UBGraphicsItemDelegate *Delegate(QGraphicsItem *pItem);
     virtual UBGraphicsItemDelegate *Delegate() const  = 0;