optimization angle / rotation

src/app/puzzle/puzzlemainwindow.cpp

@@ -200,6 +200,7 @@ VPuzzlePiece* PuzzleMainWindow::CreatePiece(const VLayoutPiece &rawPiece)
     //
     connect(piece, &VPuzzlePiece::SelectionChanged, this, &PuzzleMainWindow::on_PieceSelectionChanged);
     connect(piece, &VPuzzlePiece::PositionChanged, this, &PuzzleMainWindow::on_PiecePositionChanged);
+    connect(piece, &VPuzzlePiece::RotationChanged, this, &PuzzleMainWindow::on_PieceRotationChanged);
 
 
     return piece;
@@ -892,3 +893,15 @@ void PuzzleMainWindow::on_PiecePositionChanged()
         SetDoubleSpinBoxValue(ui->doubleSpinBoxCurrentPieceBoxPositionY, UnitConvertor(pos.y(), Unit::Px, m_layout->GetUnit()));
     }
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void PuzzleMainWindow::on_PieceRotationChanged()
+{
+    if(m_selectedPieces.count() == 1)
+    {
+        VPuzzlePiece *piece = m_selectedPieces.first();
+        qreal angle = piece->GetRotation();
+
+        SetDoubleSpinBoxValue(ui->doubleSpinBoxCurrentPieceAngle, angle);
+    }
+}

src/app/puzzle/puzzlemainwindow.h

@@ -373,6 +373,11 @@ private slots:
      */
     void on_PiecePositionChanged();
 
+    /**
+     * @brief on_PieceRotationChanged When the current piece rotation has changed
+     */
+    void on_PieceRotationChanged();
+
 };
 
 #endif // PUZZLEMAINWINDOW_H

src/app/puzzle/share/resources/puzzleicon.qrc

@@ -9,5 +9,6 @@
         <file>puzzleicon/64x64/iconPortrait.png</file>
         <file>puzzleicon/64x64/iconGrainlineVertical.png</file>
         <file>puzzleicon/64x64/iconGrainlineHorizontal.png</file>
+        <file alias="cursor_rotate">puzzleicon/64x64/cursorRotate.png</file>
     </qresource>
 </RCC>

src/app/puzzle/share/resources/puzzleicon/svg/cursor_rotate.svg

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="128"
+   height="128"
+   viewBox="0 0 33.866666 33.866668"
+   version="1.1"
+   id="svg8"
+   sodipodi:docname="icon_rotate.svg"
+   inkscape:export-filename="/home/ronan/Desktop/iconRotate.png"
+   inkscape:export-xdpi="48"
+   inkscape:export-ydpi="48"
+   inkscape:version="0.92.5 (2060ec1f9f, 2020-04-08)">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="1.4142136"
+     inkscape:cx="-73.50406"
+     inkscape:cy="-5.7476577"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="1487"
+     inkscape:window-height="906"
+     inkscape:window-x="648"
+     inkscape:window-y="365"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Ebene 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-263.13332)">
+    <path
+       style="fill:#000000;fill-opacity:0.99622641;stroke:#000000;stroke-width:0.56587124;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1"
+       d="m 7.0186194,287.41283 -6.32117702,-9.61886 4.59283552,0.0718 c 0.2260142,-13.99266 14.6277861,-19.32352 24.6168741,-9.04316 8.326613,8.56942 1.645094,23.6663 -11.704329,23.56294 l -0.02016,4.07882 -9.3161816,-5.90315 9.3649386,-5.23047 -0.0097,3.75053 c 12.855101,-0.23223 15.657569,-13.03558 9.321879,-19.01152 -6.380838,-6.01853 -18.7084318,-6.45152 -19.0255146,7.87916 l 4.6551916,0.099 z"
+       id="path873"
+       inkscape:connector-curvature="0"
+       sodipodi:nodetypes="cccscccccsccc" />
+  </g>
+</svg>

src/app/puzzle/vpuzzlegraphicspiece.cpp

@@ -36,6 +36,8 @@
 #include <QStyleOptionGraphicsItem>
 #include <QGraphicsSceneContextMenuEvent>
 #include <QMenu>
+#include <QtMath>
+#include <QGraphicsScene>
 
 #include "vpuzzlepiece.h"
 #include "vpuzzlelayer.h"
@@ -50,7 +52,8 @@ VPuzzleGraphicsPiece::VPuzzleGraphicsPiece(VPuzzlePiece *piece, QGraphicsItem *p
     m_piece(piece),
     m_cuttingLine(QPainterPath()),
     m_seamLine(QPainterPath()),
-    m_grainline(QPainterPath())
+    m_grainline(QPainterPath()),
+    m_rotationStartPoint(QPointF())
 {
     Init();
 }
@@ -66,6 +69,7 @@ void VPuzzleGraphicsPiece::Init()
 {
     // set some infos
     setFlags(ItemIsSelectable | ItemIsMovable | ItemSendsGeometryChanges);
+    setAcceptHoverEvents(true);
     setCursor(QCursor(Qt::OpenHandCursor));
 
     // initialises the seam line
@@ -188,7 +192,49 @@ void VPuzzleGraphicsPiece::mousePressEvent(QGraphicsSceneMouseEvent *event)
             setSelected(true);
         }
     }
+
+    if((event->button() == Qt::LeftButton) && (event->modifiers() & Qt::AltModifier))
+    {
+        m_rotationStartPoint = event->scenePos();
+
+        QPixmap cursor_pixmap = QPixmap(":/cursor_rotate");
+        cursor_pixmap = cursor_pixmap.scaledToWidth(32);
+        QCursor cursor_rotate = QCursor(cursor_pixmap, 16, 16);
+
+        setCursor(cursor_rotate);
     }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPuzzleGraphicsPiece::mouseMoveEvent(QGraphicsSceneMouseEvent * event)
+{
+    if((event->buttons() == Qt::LeftButton) && (event->modifiers() & Qt::AltModifier))
+    {
+
+        QPointF rotationNewPoint = event->scenePos();
+        QPointF rotationCenter = sceneBoundingRect().center();
+
+        // get the angle from the center to the initial click point
+          qreal init_x = m_rotationStartPoint.x() - rotationCenter.x();
+          qreal init_y = m_rotationStartPoint.y() - rotationCenter.y();
+          qreal initial_angle = qAtan2(init_y, init_x);
+
+          qreal x = rotationNewPoint.x() - rotationCenter.x();
+          qreal y = rotationNewPoint.y() - rotationCenter.y();
+          qreal mv_angle = qAtan2(y,x);
+
+          qreal angle = (initial_angle-mv_angle)*180/M_PI;
+
+          setTransformOriginPoint(boundingRect().center());
+          setRotation(-(angle+m_piece->GetRotation()));
+          event->accept();
+    }
+    else
+    {
+       QGraphicsItem::mouseMoveEvent(event);
+    }
+}
+
 
 //---------------------------------------------------------------------------------------------------------------------
 void VPuzzleGraphicsPiece::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
@@ -204,6 +250,36 @@ void VPuzzleGraphicsPiece::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
         setCursor(Qt::OpenHandCursor);
 
         setSelected(selectionState);
+
+        if(m_piece->GetPosition() != pos())
+        {
+            m_piece->SetPosition(pos());
+        }
+    }
+
+    if((event->button() == Qt::LeftButton) && (event->modifiers() & Qt::AltModifier))
+    {
+        m_piece->SetRotation(-rotation());
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPuzzleGraphicsPiece::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+
+    if(event->modifiers() & Qt::AltModifier)
+    {
+        // TODO FIXME: find a more efficient way
+
+        QPixmap cursor_pixmap = QPixmap(":/cursor_rotate");
+        cursor_pixmap = cursor_pixmap.scaledToWidth(32);
+        QCursor cursor_rotate = QCursor(cursor_pixmap, 16, 16);
+
+        setCursor(cursor_rotate);
+    }
+    else
+    {
+        setCursor(QCursor(Qt::OpenHandCursor));
     }
 }
 
@@ -246,7 +322,7 @@ void VPuzzleGraphicsPiece::on_ActionPieceMovedToLayer()
 {
     QAction *act = qobject_cast<QAction *>(sender());
     QVariant v = act->data();
-    VPuzzleLayer *layer = (VPuzzleLayer *) v.value<VPuzzleLayer *>();
+    VPuzzleLayer *layer = v.value<VPuzzleLayer *>();
     if(layer != nullptr)
     {
         layer->GetLayout()->MovePieceToLayer(m_piece, layer);
@@ -277,12 +353,14 @@ void VPuzzleGraphicsPiece::on_PieceRotationChanged()
 QVariant VPuzzleGraphicsPiece::itemChange(GraphicsItemChange change, const QVariant &value)
 {
     if (scene()) {
-        if(change == ItemPositionHasChanged)
-        {
-            blockSignals(true);
-            m_piece->SetPosition(pos());
-            blockSignals(false);
-        }
+
+        // we do this in the mouseRelease button to avoid updated this property all the time.
+//        if(change == ItemPositionHasChanged)
+//        {
+//            blockSignals(true);
+//            m_piece->SetPosition(pos());
+//            blockSignals(false);
+//        }
 
         if(change == ItemSelectedHasChanged)
         {

src/app/puzzle/vpuzzlegraphicspiece.h

@@ -69,8 +69,11 @@ protected:
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget) override;
 
     void mousePressEvent(QGraphicsSceneMouseEvent * event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent * event) override;
     void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
 
+    void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
+
     QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
 
     void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) override;
@@ -89,6 +92,9 @@ private:
     QPainterPath m_cuttingLine;
     QPainterPath m_seamLine;
     QPainterPath m_grainline;
+
+    QPointF m_rotationStartPoint;
+
 };
 
 #endif // VPUZZLEGRAPHICSPIECE_H

src/app/puzzle/vpuzzlepiece.cpp

@@ -143,6 +143,13 @@ QPointF VPuzzlePiece::GetPosition()
 
 //---------------------------------------------------------------------------------------------------------------------
 void VPuzzlePiece::SetRotation(qreal angle)
+{
+    //    qreal currentAngle = GetRotation();
+    //    qreal newAngle = angle - currentAngle;
+
+    //    m_transform.rotate(newAngle);
+
+    if(m_pieceAngle != angle)
     {
         m_pieceAngle = angle;
 
@@ -157,15 +164,9 @@ void VPuzzlePiece::SetRotation(qreal angle)
             m_pieceAngle += 360;
         }
 
-
-//    qreal currentAngle = GetRotation();
-//    qreal newAngle = angle - currentAngle;
-
-//    m_transform.rotate(newAngle);
-
-
         emit RotationChanged();
     }
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 qreal VPuzzlePiece::GetRotation()