Fixed pen strokes not being loaded in right position

- Modified UBvgSubsetAdaptor to correctly save and load strokes, so the
transform matrices that were saved are now loaded correctly.

- Added handling of mousePress / Move / Release events to
UBGraphicsStrokesGroup, so that the transform matrix is calculated and
stored after moving a pen stroke directly (by clicking on it, and not on
its frame). Note: this duplicates quite a bit of code that is in
UBGraphicsDelegateFrame. It may be best to go back and modify both
classes so that the same functions can be called when moving a stroke.

src/adaptors/UBSvgSubsetAdaptor.cpp

@@ -498,6 +498,18 @@ UBGraphicsScene* UBSvgSubsetAdaptor::UBSvgSubsetReader::loadScene()
                 {
                     mGroupLightBackgroundColor.setNamedColor(ubFillOnLightBackground.toString());
                 }
+
+                QStringRef ubUuid = mXmlReader.attributes().value(mNamespaceUri, "uuid");
+
+                if (!ubUuid.isNull())
+                    strokesGroup->setUuid(ubUuid.toString());
+                else
+                    strokesGroup->setUuid(QUuid::createUuid());
+
+                QString uuid_stripped = strokesGroup->uuid().toString().replace("}","").replace("{","");
+
+                if (!mStrokesList.contains(uuid_stripped))
+                    mStrokesList.insert(uuid_stripped, strokesGroup);
             }
             else if (mXmlReader.name() == "polygon" || mXmlReader.name() == "line")
             {
@@ -524,13 +536,15 @@ UBGraphicsScene* UBSvgSubsetAdaptor::UBSvgSubsetReader::loadScene()
                     if(!mStrokesList.contains(parentId)){
                         group = new UBGraphicsStrokesGroup();
                         mStrokesList.insert(parentId,group);
-                        currentStroke = new UBGraphicsStroke();
                         group->setTransform(polygonItem->transform());
                         UBGraphicsItem::assignZValue(group, polygonItem->zValue());
                     }
                     else
                         group = mStrokesList.value(parentId);
 
+                    if (!currentStroke)
+                        currentStroke = new UBGraphicsStroke();
+
                     if(polygonItem->transform().isIdentity())
                         polygonItem->setTransform(group->transform());
 
@@ -546,23 +560,33 @@ UBGraphicsScene* UBSvgSubsetAdaptor::UBSvgSubsetReader::loadScene()
             {
                 QList<UBGraphicsPolygonItem*> polygonItems = polygonItemsFromPolylineSvg(mScene->isDarkBackground() ? Qt::white : Qt::black);
 
-                QString parentId = QUuid::createUuid().toString();
+                QString parentId = mXmlReader.attributes().value(mNamespaceUri, "parent").toString();
+                qDebug() << "parentID = " << parentId;
+
+                if(parentId.isEmpty() && strokesGroup)
+                    parentId = strokesGroup->uuid().toString();
+
+                if(parentId.isEmpty())
+                    parentId = QUuid::createUuid().toString();
 
                 foreach(UBGraphicsPolygonItem* polygonItem, polygonItems)
                 {
                     polygonItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Graphic));
 
                     UBGraphicsStrokesGroup* group;
+
                     if(!mStrokesList.contains(parentId)){
                         group = new UBGraphicsStrokesGroup();
                         mStrokesList.insert(parentId,group);
-                        currentStroke = new UBGraphicsStroke();
                         group->setTransform(polygonItem->transform());
                         UBGraphicsItem::assignZValue(group, polygonItem->zValue());
                     }
                     else
                         group = mStrokesList.value(parentId);
 
+                    if (!currentStroke)
+                        currentStroke = new UBGraphicsStroke();
+
                     if(polygonItem->transform().isIdentity())
                         polygonItem->setTransform(group->transform());
 
@@ -861,6 +885,8 @@ UBGraphicsScene* UBSvgSubsetAdaptor::UBSvgSubsetReader::loadScene()
                 mGroupHasInfo = false;
                 mGroupDarkBackgroundColor = QColor();
                 mGroupLightBackgroundColor = QColor();
+                strokesGroup = NULL;
+                currentStroke = NULL;
             }
         }
     }
@@ -1127,6 +1153,9 @@ bool UBSvgSubsetAdaptor::UBSvgSubsetWriter::persistScene(int pageIndex)
                                                   , "fill-on-dark-background", colorOnDarkBackground.name());
                         mXmlWriter.writeAttribute(UBSettings::uniboardDocumentNamespaceUri
                                                   , "fill-on-light-background", colorOnLightBackground.name());
+
+                        mXmlWriter.writeAttribute(UBSettings::uniboardDocumentNamespaceUri, "uuid", UBStringUtils::toCanonicalUuid(sg->uuid()));
+
                         qDebug() << "Attributes written";
 
                         groupHoldsInfo = true;
@@ -1442,6 +1471,11 @@ void UBSvgSubsetAdaptor::UBSvgSubsetWriter::strokeToSvgPolyline(UBGraphicsStroke
                                       , "fill-on-light-background", firstPolygonItem->colorOnLightBackground().name());
         }
 
+        mXmlWriter.writeAttribute(UBSettings::uniboardDocumentNamespaceUri, "uuid", UBStringUtils::toCanonicalUuid(firstPolygonItem->uuid()));
+        if (firstPolygonItem->parentItem()) {
+            mXmlWriter.writeAttribute(UBSettings::uniboardDocumentNamespaceUri, "parent", UBStringUtils::toCanonicalUuid(UBGraphicsItem::getOwnUuid(firstPolygonItem->strokesGroup())));
+        }
+
         mXmlWriter.writeEndElement();
     }
 }

src/board/UBBoardView.cpp

@@ -561,7 +561,7 @@ Here we determines cases when items should to get mouse press event at pressing
         break;
 
     case UBGraphicsItemType::StrokeItemType:
-        if (currentTool == UBStylusTool::Play)
+        if (currentTool == UBStylusTool::Play || currentTool == UBStylusTool::Selector)
             return true;
         break;
     // Groups shouldn't reacts on any presses and moves for Play tool.
@@ -664,7 +664,7 @@ bool UBBoardView::itemShouldBeMoved(QGraphicsItem *item)
             return false;
     case UBGraphicsMediaItem::Type:
     case UBGraphicsStrokesGroup::Type:
-        return true;
+        return false;
     case UBGraphicsTextItem::Type:
         return !item->isSelected();
     }
@@ -1254,6 +1254,7 @@ void UBBoardView::mouseReleaseEvent (QMouseEvent *event)
                     if (isUBItem(movingItem) &&
                             DelegateButton::Type != movingItem->type() &&
                             UBGraphicsDelegateFrame::Type !=  movingItem->type() &&
+                            UBGraphicsStrokesGroup::Type !=  movingItem->type() &&
                             UBGraphicsCache::Type != movingItem->type() &&
                             QGraphicsWebView::Type != movingItem->type() && // for W3C widgets as Tools.
                             !(!isMultipleSelectionEnabled() && movingItem->parentItem() && UBGraphicsWidgetItem::Type == movingItem->type() && UBGraphicsGroupContainerItem::Type == movingItem->parentItem()->type()))

src/domain/UBGraphicsStrokesGroup.cpp

@@ -111,30 +111,44 @@ QColor UBGraphicsStrokesGroup::color(colorType pColorType) const
 
 void UBGraphicsStrokesGroup::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
-    if (Delegate()->mousePressEvent(event))
-    {
-        //NOOP
-    }
-    else
-    {
-//        QGraphicsItemGroup::mousePressEvent(event);
-    }
+    Delegate()->startUndoStep();
+
+    mStartingPoint = event->scenePos();
+
+    initializeTransform();
+
+    mTranslateX = 0;
+    mTranslateY = 0;
+    mAngleOffset = 0;
+
+    mInitialTransform = buildTransform();
+
+    event->accept();
 }
 
 void UBGraphicsStrokesGroup::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
-    if (Delegate()->mouseMoveEvent(event))
-    {
-        // NOOP;
-    }
-    else
-    {
-        QGraphicsItemGroup::mouseMoveEvent(event);
-    }
+    QLineF move = QLineF(mStartingPoint, event->scenePos());
+
+    mTranslateX = move.dx();
+    mTranslateY = move.dy();
+    //Delegate()->frame()->moveLinkedItems(move);
+
+    setTransform(buildTransform());
+    
+    event->accept();
+     
 }
 
 void UBGraphicsStrokesGroup::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 {
+    Delegate()->commitUndoStep();
+
+    mTotalTranslateX += mTranslateX;
+    mTotalTranslateY += mTranslateY;
+
+    event->accept();
+
     Delegate()->mouseReleaseEvent(event);
     QGraphicsItemGroup::mouseReleaseEvent(event);
 }
@@ -226,3 +240,80 @@ QPainterPath UBGraphicsStrokesGroup::shape() const
 
     return path;
 }
+
+void UBGraphicsStrokesGroup::initializeTransform()
+{
+    
+    QTransform itemTransform = sceneTransform();
+    QRectF itemRect = boundingRect();
+    QPointF topLeft = itemTransform.map(itemRect.topLeft());
+    QPointF topRight = itemTransform.map(itemRect.topRight());
+    QPointF bottomLeft = itemTransform.map(itemRect.bottomLeft());
+
+    qreal horizontalFlip = (topLeft.x() > topRight.x()) ? -1 : 1;
+    mMirrorX = horizontalFlip < 0 ;
+    if(horizontalFlip < 0){
+        // why this is because of the way of calculating the translations that checks which side is the most is the
+        // nearest instead of checking which one is the left side.
+        QPointF tmp = topLeft;
+        topLeft = topRight;
+        topRight = tmp;
+
+        // because of the calculation of the height is done by lenght and not deltaY
+        bottomLeft = itemTransform.map(itemRect.bottomRight());
+    }
+
+    qreal verticalFlip = (bottomLeft.y() < topLeft.y()) ? -1 : 1;
+    // not sure that is usefull
+    mMirrorY = verticalFlip < 0;
+    if(verticalFlip < 0 && !mMirrorX){
+        topLeft = itemTransform.map(itemRect.bottomLeft());
+        topRight = itemTransform.map(itemRect.bottomRight());
+        bottomLeft = itemTransform.map(itemRect.topLeft());
+    }
+
+    QLineF topLine(topLeft, topRight);
+    QLineF leftLine(topLeft, bottomLeft);
+    qreal width = topLine.length();
+    qreal height = leftLine.length();
+
+    mAngle = topLine.angle();
+
+    // the fact the the length is used we loose the horizontalFlip information
+    // a better way to do this is using DeltaX that preserve the direction information.
+    mTotalScaleX = (width / itemRect.width()) * horizontalFlip;
+    mTotalScaleY = height / itemRect.height() * verticalFlip;
+    
+    
+
+    QTransform tr;
+    QPointF center = boundingRect().center();
+    tr.translate(center.x() * mTotalScaleX, center.y() * mTotalScaleY);
+    tr.rotate(-mAngle);
+    tr.translate(-center.x() * mTotalScaleX, -center.y() * mTotalScaleY);
+    tr.scale(mTotalScaleX, mTotalScaleY);
+
+    mTotalTranslateX = transform().dx() - tr.dx();
+    mTotalTranslateY = transform().dy() - tr.dy();
+    
+    
+}
+
+QTransform UBGraphicsStrokesGroup::buildTransform()
+{
+    QTransform tr;
+    QPointF center = boundingRect().center();
+
+    // Translate
+    tr.translate(mTotalTranslateX + mTranslateX, mTotalTranslateY + mTranslateY);
+
+    // Set angle
+    tr.translate(center.x() * mTotalScaleX, center.y() * mTotalScaleY);
+    tr.rotate(-mAngle);
+    tr.translate(-center.x() * mTotalScaleX, -center.y() * mTotalScaleY);
+
+    // Scale
+    tr.scale(mTotalScaleX, mTotalScaleY );
+
+    return tr;
+}

src/domain/UBGraphicsStrokesGroup.h

@@ -66,6 +66,34 @@ protected:
     virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
     virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
     virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
+
+ private:
+    qreal mTranslateX;
+    qreal mTranslateY;
+    qreal mTotalTranslateX;
+    qreal mTotalTranslateY;
+
+    qreal mAngle;
+    qreal mAngleOffset;
+
+    qreal mTotalScaleX;
+    qreal mTotalScaleY;
+    qreal mScaleX;
+    qreal mScaleY;
+
+    bool mFlippedX;
+    bool mFlippedY;
+    bool mMirrorX;
+    bool mMirrorY;
+    bool mResizing;
+    bool mMirroredXAtStart;
+    bool mMirroredYAtStart;
+
+    QPointF mStartingPoint;
+    QTransform mInitialTransform;
+
+    QTransform buildTransform ();
+    void  initializeTransform ();
 };
 
 #endif // UBGRAPHICSSTROKESGROUP_H