Work on layer and graphics view behaviour

src/app/puzzle/vpiececarrousel.h

@@ -76,7 +76,6 @@ public:
      */
     void ClearSelection();
 
-
 private:
     Q_DISABLE_COPY(VPieceCarrousel)
 
@@ -92,6 +91,11 @@ private:
 
 
 private slots:
+
+    /**
+     * @brief on_ActiveLayerChanged Called when the active layer is changed
+     * @param index
+     */
     void on_ActiveLayerChanged(int index);
 };
 

src/app/puzzle/vpiececarrousellayer.cpp

@@ -48,7 +48,7 @@ VPieceCarrouselLayer::VPieceCarrouselLayer(VPuzzleLayer *layer, VPieceCarrousel
 //---------------------------------------------------------------------------------------------------------------------
 VPieceCarrouselLayer::~VPieceCarrouselLayer()
 {
-    // TODO
+    Clear();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -61,13 +61,16 @@ void VPieceCarrouselLayer::Init()
 
     // then refresh the content
     Refresh();
+
+    // add the connections
+    connect(m_layer, &VPuzzleLayer::PieceAdded, this, &VPieceCarrouselLayer::on_PieceAdded);
+    connect(m_layer, &VPuzzleLayer::PieceRemoved, this, &VPieceCarrouselLayer::on_PieceRemoved);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void VPieceCarrouselLayer::Refresh()
 {
-    // remove the existing carrousel pieces
+    Clear();
-    // TODO
 
     // Updates the carrousel pieces from the pieces list
     QList<VPuzzlePiece*> pieces = m_layer->GetPieces();
@@ -78,20 +81,33 @@ void VPieceCarrouselLayer::Refresh()
 
     // create the corresponding carrousel pieces
 
+    bool _isVisible = isVisible();
+    setVisible(true);
     for (auto piece : pieces)
     {
-//        qCDebug(pCarrouselLayer, "piece name : %s", piece->GetName().toStdString().c_str());
-
         VPieceCarrouselPiece *carrouselPiece = new VPieceCarrouselPiece(piece, this);
         m_carrouselPieces.append(carrouselPiece);
         layout()->addWidget(carrouselPiece);
-
+        carrouselPiece->CleanPreview(); // fitInView only works if the widget is displayed.
-        // FIXME? the fitInView inside the refresh of the piece doesn't workd properly.
-        // only by doing the following I did get it to work:
-        setVisible(true);
-        carrouselPiece->CleanPreview();
-        setVisible(false);
     }
+    setVisible(_isVisible);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPieceCarrouselLayer::Clear()
+{
+    // Removes and deletes the carrousel pieces from the layer
+    while (!m_carrouselPieces.isEmpty())
+    {
+        VPieceCarrouselPiece *carrouselPiece = m_carrouselPieces.takeLast();
+
+        if(carrouselPiece != nullptr)
+        {
+            layout()->removeWidget(carrouselPiece);
+            delete carrouselPiece;
+        }
+    }
+
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -106,3 +122,34 @@ VPieceCarrousel* VPieceCarrouselLayer::GetCarrousel()
     return m_carrousel;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VPuzzleLayer* VPieceCarrouselLayer::GetLayer()
+{
+    return m_layer;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPieceCarrouselLayer::on_PieceAdded(VPuzzlePiece* piece)
+{
+    Q_UNUSED(piece)
+
+    // TODO/ FIXME: see if we find a solution more efficient refreshing the complete layout everytime.
+
+    Refresh();
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPieceCarrouselLayer::on_PieceRemoved(VPuzzlePiece* piece)
+{
+    for (auto carrouselPiece : m_carrouselPieces)
+    {
+        if(carrouselPiece->GetPiece() == piece)
+        {
+            m_carrouselPieces.removeAll(carrouselPiece);
+            layout()->removeWidget(carrouselPiece);
+            delete carrouselPiece;
+
+            return;
+        }
+    }
+}

src/app/puzzle/vpiececarrousellayer.h

@@ -45,10 +45,21 @@ public:
     void Init();
     void Refresh();
 
+    /**
+     * @brief Clear it clears the carrousel layer from its pieces
+     */
+    void Clear();
+
     QList<VPieceCarrouselPiece*> GetCarrouselPieces();
 
     VPieceCarrousel* GetCarrousel();
 
+    /**
+     * @brief GetPuzzleLayer Returns the corresponding VPuzzleLayer
+     * @return the VPuzzleLayer
+     */
+    VPuzzleLayer* GetLayer();
+
 private:
     Q_DISABLE_COPY(VPieceCarrouselLayer)
 
@@ -58,6 +69,16 @@ private:
 
 private slots:
 
+    /**
+     * @brief on_PieceUpdated This slot is called when a piece was added
+     */
+    void on_PieceAdded(VPuzzlePiece* piece);
+
+    /**
+     * @brief on_PieceUpdated This slot is called when a piece was removed
+     */
+    void on_PieceRemoved(VPuzzlePiece* piece);
+
 };
 
 #endif // VPIECECARROUSELLAYER_H

src/app/puzzle/vpiececarrouselpiece.cpp

@@ -99,7 +99,6 @@ void VPieceCarrouselPiece::Init()
     // connect the signals
     connect(m_piece, &VPuzzlePiece::SelectionChanged, this, &VPieceCarrouselPiece::on_PieceSelectionChanged);
 
-
     // then refresh the data
     Refresh();
 }
@@ -141,6 +140,9 @@ void VPieceCarrouselPiece::Refresh()
 
     // set the tooltip
     setToolTip(m_piece->GetName());
+
+    // set the selection state correctly.
+    on_PieceSelectionChanged();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -162,8 +164,6 @@ void VPieceCarrouselPiece::on_PieceSelectionChanged()
     }
 }
 
-
-
 //---------------------------------------------------------------------------------------------------------------------
 void VPieceCarrouselPiece::mousePressEvent(QMouseEvent *event)
 {
@@ -194,6 +194,12 @@ void VPieceCarrouselPiece::mouseMoveEvent(QMouseEvent *event)
     {
         return;
     }
+
+    if(m_piece->GetLayer() != m_piece->GetLayer()->GetLayout()->GetUnplacedPiecesLayer())
+    {
+        return;
+    }
+
     if((event->pos() - m_dragStart).manhattanLength() < QApplication::startDragDistance())
     {
         return;

src/app/puzzle/vpuzzlegraphicslayout.cpp

@@ -31,9 +31,10 @@
 //---------------------------------------------------------------------------------------------------------------------
 VPuzzleGraphicsLayout::VPuzzleGraphicsLayout(VPuzzleLayout *layout, QGraphicsItem *parent):
     QGraphicsItem(parent),
-    m_layout(layout)
+    m_layout(layout),
+    m_boundingRect(GetLayoutRect())
 {
-    m_boundingRect = GetLayoutRect();
+
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/app/puzzle/vpuzzlegraphicspiece.cpp

@@ -90,6 +90,11 @@ void VPuzzleGraphicsPiece::Init()
     connect(m_piece, &VPuzzlePiece::PositionChanged, this, &VPuzzleGraphicsPiece::on_PiecePositionChanged);
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VPuzzlePiece* VPuzzleGraphicsPiece::GetPiece()
+{
+    return m_piece;
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 QRectF VPuzzleGraphicsPiece::boundingRect() const
@@ -120,20 +125,25 @@ void VPuzzleGraphicsPiece::paint(QPainter *painter, const QStyleOptionGraphicsIt
     Q_UNUSED(option);
 
     QPen pen(Qt::black, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
-    if(isSelected())
-    {
-        pen.setColor(Qt::red);
-    }
-
     QBrush noBrush(Qt::NoBrush);
+    QBrush selectionBrush(QColor(255,160,160,60));
 
     painter->setPen(pen);
+
+    if(isSelected())
+    {
+       painter->setBrush(selectionBrush);
+    }
+    else
+    {
         painter->setBrush(noBrush);
+    }
 
     // paint the cutting line
     if(!m_cuttingLine.isEmpty())
     {
         painter->drawPath(m_cuttingLine);
+        painter->setBrush(noBrush);
     }
 
     // paint the seam line
@@ -142,6 +152,8 @@ void VPuzzleGraphicsPiece::paint(QPainter *painter, const QStyleOptionGraphicsIt
         painter->drawPath(m_seamLine);
     }
 
+    painter->setBrush(noBrush);
+
     // paint the grainline
     if(!m_grainline.isEmpty())
     {

src/app/puzzle/vpuzzlegraphicspiece.h

@@ -41,6 +41,12 @@ public:
     ~VPuzzleGraphicsPiece();
     void Init();
 
+    /**
+     * @brief GetPiece Returns the piece that corresponds to the graphics piece
+     * @return the piece
+     */
+    VPuzzlePiece* GetPiece();
+
 public slots:
     /**
      * @brief on_PieceSelectionChanged When the piece selection was changed

src/app/puzzle/vpuzzlelayer.cpp

@@ -27,8 +27,15 @@
  *************************************************************************/
 #include "vpuzzlelayer.h"
 
+#include "vpuzzlelayout.h"
+
+#include <QLoggingCategory>
+
+Q_LOGGING_CATEGORY(pLayer, "p.layer")
+
 //---------------------------------------------------------------------------------------------------------------------
-VPuzzleLayer::VPuzzleLayer()
+VPuzzleLayer::VPuzzleLayer(VPuzzleLayout *layout):
+    m_layout(layout)
 {
 
 }
@@ -39,6 +46,12 @@ VPuzzleLayer::~VPuzzleLayer()
 
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VPuzzleLayout* VPuzzleLayer::GetLayout()
+{
+    return m_layout;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 QList<VPuzzlePiece *> VPuzzleLayer::GetPieces()
 {
@@ -48,13 +61,21 @@ QList<VPuzzlePiece *> VPuzzleLayer::GetPieces()
 //---------------------------------------------------------------------------------------------------------------------
 void VPuzzleLayer::AddPiece(VPuzzlePiece *piece)
 {
+    qCDebug(pLayer(), "piece -- %s -- added to %s", qUtf8Printable(piece->GetName()), qUtf8Printable(this->GetName()));
+
     m_pieces.append(piece);
+    piece->SetLayer(this);
+
+    emit PieceAdded(piece);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void VPuzzleLayer::RemovePiece(VPuzzlePiece *piece)
 {
     m_pieces.removeAll(piece);
+    piece->SetLayer(nullptr);
+
+    emit PieceRemoved(piece);
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/app/puzzle/vpuzzlelayer.h

@@ -31,10 +31,13 @@
 #include <QList>
 #include "vpuzzlepiece.h"
 
-class VPuzzleLayer
+class VPuzzleLayout;
+
+class VPuzzleLayer : public QObject
 {
+    Q_OBJECT
 public:
-    VPuzzleLayer();
+    VPuzzleLayer(VPuzzleLayout *layout);
     ~VPuzzleLayer();
 
     QList<VPuzzlePiece *> GetPieces();
@@ -50,10 +53,31 @@ public:
     void SetIsVisible(bool value);
     bool GetIsVisible() const;
 
+    /**
+     * @brief GetLayout Returns the layout in which this layer is
+     * @return the layout of this layer
+     */
+    VPuzzleLayout* GetLayout();
+
+signals:
+    /**
+     * @brief PieceAdded The signal is emited when a piece was added
+     */
+    void PieceAdded(VPuzzlePiece *piece);
+
+    /**
+     * @brief PieceRemoved The signal is emited when a piece was removed
+     */
+    void PieceRemoved(VPuzzlePiece *piece);
+
 private:
+    Q_DISABLE_COPY(VPuzzleLayer)
+
     QString m_name{};
     QList<VPuzzlePiece *> m_pieces{};
 
+    VPuzzleLayout *m_layout{nullptr};
+
     // control
     bool m_isVisible{true};
 

src/app/puzzle/vpuzzlelayout.cpp

@@ -31,14 +31,17 @@
 
 //---------------------------------------------------------------------------------------------------------------------
 VPuzzleLayout::VPuzzleLayout() :
-    m_unplacedPiecesLayer(new VPuzzleLayer())
+    m_unplacedPiecesLayer(new VPuzzleLayer(this))
 {
     m_unplacedPiecesLayer->SetName(QObject::tr("Unplaced pieces"));
 
     // create a standard default layer:
-    VPuzzleLayer *layer = new VPuzzleLayer();
+    VPuzzleLayer *layer = new VPuzzleLayer(this);
     layer->SetName(QObject::tr("Layout"));
     AddLayer(layer);
+
+    // sets the default active layer
+    SetFocusedLayer();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -57,7 +60,7 @@ VPuzzleLayer* VPuzzleLayout::GetUnplacedPiecesLayer()
 //---------------------------------------------------------------------------------------------------------------------
 VPuzzleLayer* VPuzzleLayout::AddLayer()
 {
-    VPuzzleLayer *newLayer = new VPuzzleLayer();
+    VPuzzleLayer *newLayer = new VPuzzleLayer(this);
     m_layers.append(newLayer);
     return newLayer;
 }
@@ -277,3 +280,37 @@ void VPuzzleLayout::ClearSelection()
         piece->SetIsSelected(false);
     }
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPuzzleLayout::SetFocusedLayer(VPuzzleLayer* focusedLayer)
+{
+    if(focusedLayer == nullptr)
+    {
+        m_focusedLayer = m_layers.first();
+    }
+    else
+    {
+        m_focusedLayer = focusedLayer;
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+VPuzzleLayer* VPuzzleLayout::GetFocusedLayer()
+{
+    return m_focusedLayer;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPuzzleLayout::MovePieceToLayer(VPuzzlePiece* piece, VPuzzleLayer* layer)
+{
+    VPuzzleLayer* layerBefore = piece->GetLayer();
+
+    if(layerBefore != nullptr)
+    {
+        piece->GetLayer()->RemovePiece(piece);
+    }
+    layer->AddPiece(piece);
+
+    // signal, that a piece was moved
+    emit PieceMovedToLayer(piece, layerBefore,layer);
+}

src/app/puzzle/vpuzzlelayout.h

@@ -40,8 +40,9 @@ class VPuzzlePiece;
 // is this the right place for the definition?
 enum class FollowGrainline : qint8 { No = 0, Follow90 = 1, Follow180 = 2};
 
-class VPuzzleLayout
+class VPuzzleLayout : public QObject
 {
+    Q_OBJECT
 public:
     VPuzzleLayout();
     virtual ~VPuzzleLayout();
@@ -200,11 +201,43 @@ public:
      */
     void ClearSelection();
 
+    /**
+     * @brief SetFocusedLayer Sets the focused layer, to which pieces are added from the carrousel via drag
+     * and drop
+     * @param focusedLayer the new active layer. If nullptr, then it sets automaticaly the first layer from m_layers
+     */
+    void SetFocusedLayer(VPuzzleLayer* focusedLayer = nullptr);
+
+    /**
+     * @brief GetFocusedLayer Returns the focused layer, to which pieces are added from the carrousel via drag
+     * and drop
+     * @return the focused layer
+     */
+    VPuzzleLayer* GetFocusedLayer();
+
+    /**
+     * @brief MovePieceToLayer Moves the given piece to the given layer
+     * @param piece the piece to move
+     * @param layer the layer to move the piece to
+     */
+    void MovePieceToLayer(VPuzzlePiece* piece, VPuzzleLayer* layer);
+
+signals:
+
+    void PieceMovedToLayer(VPuzzlePiece *piece, VPuzzleLayer *layerBefore, VPuzzleLayer *layerAfter);
+
 private:
     Q_DISABLE_COPY(VPuzzleLayout)
+
     VPuzzleLayer *m_unplacedPiecesLayer;
     QList<VPuzzleLayer *> m_layers{};
 
+    /**
+     * @brief m_focusedLayer pointer the the focused layer, to which pieces will be
+     * added via drag and drop, or if no layer is defined.
+     */
+    VPuzzleLayer *m_focusedLayer{nullptr};
+
     // format
     Unit m_unit{Unit::Cm};
     /**

src/app/puzzle/vpuzzlemaingraphicsscene.cpp

@@ -28,7 +28,6 @@
 
 #include "vpuzzlemaingraphicsscene.h"
 
-
 //---------------------------------------------------------------------------------------------------------------------
 VPuzzleMainGraphicsScene::VPuzzleMainGraphicsScene(QObject *parent): QGraphicsScene(parent)
 {

src/app/puzzle/vpuzzlemaingraphicsscene.h

@@ -38,6 +38,7 @@ class VPuzzleMainGraphicsScene : public QGraphicsScene
     Q_OBJECT
 public:
     VPuzzleMainGraphicsScene(QObject *parent = nullptr);
+
 };
 
 #endif // VPUZZLEMAINGRAPHICSSCENE_H

src/app/puzzle/vpuzzlemaingraphicsview.cpp

@@ -30,8 +30,10 @@
 
 #include <QDragEnterEvent>
 #include <QMimeData>
+#include <QKeyEvent>
 
 #include "vpuzzlemimedatapiece.h"
+#include "vpuzzlelayer.h"
 
 #include <QLoggingCategory>
 
@@ -41,6 +43,7 @@ Q_LOGGING_CATEGORY(pMainGraphicsView, "p.mainGraphicsView")
 //---------------------------------------------------------------------------------------------------------------------
 VPuzzleMainGraphicsView::VPuzzleMainGraphicsView(VPuzzleLayout *layout, QWidget *parent) :
     QGraphicsView(parent),
+    m_layout(layout),
     m_graphicsPieces(QList<VPuzzleGraphicsPiece*>())
 {
     m_scene = new VPuzzleMainGraphicsScene(this);
@@ -53,6 +56,9 @@ VPuzzleMainGraphicsView::VPuzzleMainGraphicsView(VPuzzleLayout *layout, QWidget
     setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
 
     setAcceptDrops(true);
+
+    // add the connections
+    connect(m_layout, &VPuzzleLayout::PieceMovedToLayer, this, &VPuzzleMainGraphicsView::on_PieceMovedToLayer);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -119,30 +125,66 @@ void VPuzzleMainGraphicsView::dropEvent(QDropEvent *event)
             qCDebug(pMainGraphicsView(), "element dropped, %s", qUtf8Printable(piece->GetName()));
             event->acceptProposedAction();
 
-
             QPoint point = event->pos();
-            QPointF scenePos = mapToScene(point);
+            piece->SetPosition(mapToScene(point));
-            // todo take the position into account
-
-            AddPiece(piece, scenePos);
 
+            // change the layer of the piece
+            VPuzzleLayer *focusedLayer = m_layout->GetFocusedLayer();
+            if(focusedLayer != nullptr)
+            {
+                m_layout->MovePieceToLayer(piece, focusedLayer);
+            }
         }
     }
 }
-
 
 //---------------------------------------------------------------------------------------------------------------------
-void VPuzzleMainGraphicsView::AddPiece(VPuzzlePiece *piece, QPointF pos)
+void VPuzzleMainGraphicsView::keyPressEvent(QKeyEvent *event)
 {
-    VPuzzleGraphicsPiece *item = new VPuzzleGraphicsPiece(piece);
+    if(event->key() == Qt::Key_Backspace || event->key() == Qt::Key_Delete)
-    m_scene->addItem(item);
+    {
-    item->setSelected(true);
+        for(auto graphicsPiece : m_graphicsPieces)
-    item->setPos(pos);
+        {
-
+            VPuzzlePiece *piece = graphicsPiece->GetPiece();
-    item->blockSignals(true);
-    piece->SetPosition(pos);
-    item->blockSignals(false);
-
-
 
+            if(piece->GetIsSelected())
+            {
+                m_layout->MovePieceToLayer(piece, m_layout->GetUnplacedPiecesLayer());
+            }
+        }
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPuzzleMainGraphicsView::on_PieceMovedToLayer(VPuzzlePiece *piece, VPuzzleLayer *layerBefore, VPuzzleLayer *layerAfter)
+{
+    Q_UNUSED(layerBefore)
+
+    VPuzzleGraphicsPiece *_graphicsPiece = nullptr;
+    for(auto graphicPiece : m_graphicsPieces)
+    {
+        if(graphicPiece->GetPiece() == piece)
+        {
+            _graphicsPiece = graphicPiece;
+        }
+    }
+
+    if(layerAfter == m_layout->GetUnplacedPiecesLayer() && _graphicsPiece != nullptr)
+    {
+        scene()->removeItem(_graphicsPiece);
+        m_graphicsPieces.removeAll(_graphicsPiece);
+    }
+    else if(layerAfter != m_layout->GetUnplacedPiecesLayer())
+    {
+        if(_graphicsPiece == nullptr)
+        {
+            _graphicsPiece = new VPuzzleGraphicsPiece(piece);
+            m_graphicsPieces.append(_graphicsPiece);
+        }
+
+        scene()->addItem(_graphicsPiece);
+        _graphicsPiece->setPos(_graphicsPiece->GetPiece()->GetPosition());
+        _graphicsPiece->setSelected(_graphicsPiece->GetPiece()->GetIsSelected());
+        _graphicsPiece->update();
+    }
 }

src/app/puzzle/vpuzzlemaingraphicsview.h

@@ -50,14 +50,22 @@ public:
      */
     void RefreshLayout();
 
-    void AddPiece(VPuzzlePiece *piece, QPointF pos);
-
 protected:
     void dragEnterEvent(QDragEnterEvent *event) override;
     void dragMoveEvent(QDragMoveEvent *event) override;
     void dragLeaveEvent(QDragLeaveEvent *event) override;
     void dropEvent(QDropEvent *event) override;
 
+    void keyPressEvent(QKeyEvent *event) override;
+
+private slots:
+    /**
+     * @brief on_PieceMovedToLayer The slot is called when the given piece was moved from the given layer to the other given layer
+     * @param piece the piece that was moved
+     * @param layerBefore the layer before the move
+     * @param layerAfter the layer after the move
+     */
+    void on_PieceMovedToLayer(VPuzzlePiece *piece, VPuzzleLayer *layerBefore, VPuzzleLayer *layerAfter);
 
 private:
     Q_DISABLE_COPY(VPuzzleMainGraphicsView)
@@ -65,6 +73,8 @@ private:
     VPuzzleMainGraphicsScene *m_scene{nullptr};
 
     VPuzzleGraphicsLayout *m_graphicsLayout{nullptr};
+    VPuzzleLayout *m_layout{nullptr};
+
     QList<VPuzzleGraphicsPiece*> m_graphicsPieces;
 
 };

src/app/puzzle/vpuzzlepiece.cpp

@@ -27,6 +27,12 @@
  *************************************************************************/
 #include "vpuzzlepiece.h"
 
+#include "vpuzzlelayer.h"
+
+#include <QLoggingCategory>
+
+Q_LOGGING_CATEGORY(pPiece, "p.piece")
+
 //---------------------------------------------------------------------------------------------------------------------
 VPuzzlePiece::VPuzzlePiece()
 {
@@ -200,3 +206,18 @@ QVector<QPointF> VPuzzlePiece::GetGrainline()
     return m_grainline;
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+VPuzzleLayer* VPuzzlePiece::GetLayer()
+{
+    return m_layer;
+}
+
+
+//---------------------------------------------------------------------------------------------------------------------
+void VPuzzlePiece::SetLayer(VPuzzleLayer* layer)
+{
+    if(layer != m_layer)
+    {
+        m_layer = layer;
+    }
+}

src/app/puzzle/vpuzzlepiece.h

@@ -33,6 +33,8 @@
 #include <QPoint>
 #include <QTransform>
 
+class VPuzzleLayer;
+
 class VPuzzlePiece : public QObject
 {
     Q_OBJECT
@@ -135,18 +137,6 @@ public:
      */
     qreal GetRotation();
 
-    /**
-     * @brief SetIsSelected Sets wether the piece is selected
-     * @param value true if the piece is selected
-     */
-    void SetIsSelected(bool value);
-
-    /**
-     * @brief GetIsSelected Returns wether the piece is selected
-     * @return true if the piece is selected
-     */
-    bool GetIsSelected();
-
     /**
      * @brief SetIsGrainlineEnabled Wether the piece has a grainline or not
      * @param value true or false
@@ -184,6 +174,30 @@ public:
     QVector<QPointF> GetGrainline();
 
 
+    /**
+     * @brief SetIsSelected Sets wether the piece is selected
+     * @param value true if the piece is selected
+     */
+    void SetIsSelected(bool value);
+
+    /**
+     * @brief GetIsSelected Returns wether the piece is selected. It emit the signal SelectionChanged
+     * @return true if the piece is selected
+     */
+    bool GetIsSelected();
+
+    /**
+     * @brief GetLayer Returns the layer in which the piece is.
+     * @return layer of the piece
+     */
+    VPuzzleLayer* GetLayer();
+
+    /**
+     * @brief SetLayer Sets the layer of the piece to the given layer
+     * @param layer
+     */
+    void SetLayer(VPuzzleLayer* layer);
+
 signals:
     /**
      * @brief SelectionChanged emited when the selection of the piece was
@@ -209,12 +223,8 @@ signals:
      */
     void PropertiesChanged();
 
-    /**
-     * @brief LayerChanged emited when the piece's layer was changed.
-     */
-    void LayerChanged();
-
 private:
+    Q_DISABLE_COPY(VPuzzlePiece)
     QUuid m_uuid{QUuid()};
     QString m_name{QString()};
     QVector<QPointF> m_cuttingLine{QVector<QPointF>()};
@@ -228,7 +238,9 @@ private:
 
     bool m_showSeamline{true};
     bool m_mirrorPiece{false};
+
     bool m_isSelected{false};
+    VPuzzleLayer *m_layer{nullptr};
 };
 
 #endif // VPUZZLEPIECE_H