scale command is now undo-able command

include/commands.h

@@ -60,7 +60,8 @@ public:
 
     enum MergeableCommandId
     {
-        MoveCommandId = 0
+        MoveCommandId = 0,
+        ScaleCommandId
     };
 
     BaseUndoClass(UndoContext context);
@@ -193,9 +194,8 @@ public:
     void undo();
     void redo();
 
-private:
-
-    QMap<Node*, qreal> m_scaleMap;
+    bool mergeWith(const QUndoCommand *command);
+    int id() const;
 };
 
 

include/graphlogic.h

@@ -64,7 +64,7 @@ public slots:
 signals:
 
     void contentChanged(const bool& changed = true);
-    void notification(const QString &msg);
+    void  notification(const QString &msg);
 
 private:
 

include/graphwidget.h

@@ -36,6 +36,10 @@ public slots:
     void zoomIn();
     void zoomOut();
 
+signals:
+
+    void  notification(const QString &msg);
+
 protected:
 
     void keyPressEvent(QKeyEvent *event);
@@ -44,7 +48,7 @@ protected:
 
 private:
 
-    void scaleView(qreal scaleFactor);
+    void scaleView(qreal factor);
 
 
     MainWindow *m_parent;

qtmindmap.pro

@@ -37,7 +37,7 @@ HEADERS  += include/mainwindow.h \
 
 FORMS        += ui/mainwindow.ui
 
-RESOURCES += images/qtmindmap.qrc
+RESOURCES    += images/qtmindmap.qrc
 
 
 # the translation hack

qtmindmap_test.pro

@@ -6,6 +6,7 @@ TARGET = qtmindmap_test
 
 SOURCES += src/mainwindow.cpp \
            src/graphwidget.cpp \
+           src/graphlogic.cpp \
            src/node.cpp \
            src/edge.cpp \
            src/systemtray.cpp \
@@ -14,6 +15,7 @@ SOURCES += src/mainwindow.cpp \
 
 HEADERS  += include/mainwindow.h \
             include/graphwidget.h \
+            include/graphlogic.hpp \
             include/node.h \
             include/edge.h \
             include/systemtray.h \

src/commands.cpp

@@ -367,20 +367,18 @@ void NodeTextColorCommand::redo()
 ScaleNodeCommand::ScaleNodeCommand(UndoContext context)
     : BaseUndoClass(context)
 {
-    setText(QObject::tr("Changing scale of node: \"").append(
+    setText(QObject::tr("Node \"").append(
                 m_context.m_activeNode == m_context.m_nodeList->first() ?
                     QObject::tr("Base node") :
-                    m_context.m_activeNode->toPlainText()).append("\"").
-                append(m_subtree ? QObject::tr(" with subtree") : QString("")));
-
-    foreach(Node *node, m_nodeList)
-        m_scaleMap[node] = node->scale();
+                    m_context.m_activeNode->toPlainText()).
+            append("\" scaled (%1%)").arg(int((1+m_context.m_scale)*100)).
+            append(m_subtree ? QObject::tr(" with subtree") : QString("")));
 }
 
 void ScaleNodeCommand::undo()
 {
     foreach(Node *node, m_nodeList)
-        node->setScale(m_scaleMap[node], m_context.m_graphLogic->graphWidget()->sceneRect());
+        node->setScale(qreal(-m_context.m_scale), m_context.m_graphLogic->graphWidget()->sceneRect());
 
     m_context.m_graphLogic->setActiveNode(m_activeNode);
 }
@@ -392,3 +390,33 @@ void ScaleNodeCommand::redo()
 
     m_context.m_graphLogic->setActiveNode(m_activeNode);
 }
+
+bool ScaleNodeCommand::mergeWith(const QUndoCommand *command)
+{
+    if (command->id() != id())
+        return false;
+
+    const ScaleNodeCommand *scaleNodeCommand = static_cast<const ScaleNodeCommand *>(command);
+
+    if (m_context.m_activeNode != scaleNodeCommand->m_context.m_activeNode)
+        return false;
+
+    if (m_subtree != scaleNodeCommand->m_subtree)
+        return false;
+
+    m_context.m_scale += scaleNodeCommand->m_context.m_scale;
+
+    setText(QObject::tr("Node \"").append(
+                m_context.m_activeNode == m_context.m_nodeList->first() ?
+                    QObject::tr("Base node") :
+                    m_context.m_activeNode->toPlainText()).
+            append("\" scaled (%1%)").arg(int((1+m_context.m_scale)*100)).
+            append(m_subtree ? QObject::tr(" with subtree") : QString("")));
+
+    return true;
+}
+
+int ScaleNodeCommand::id() const
+{
+    return ScaleCommandId;
+}

src/graphlogic.cpp

@@ -416,6 +416,12 @@ void GraphLogic::scaleUp()
         return;
     }
 
+    if (m_activeNode->scale()+qreal(0.2) > qreal(4))
+    {
+        emit notification(tr("Too much scaling."));
+        return;
+    }
+
     bool subtree(QApplication::keyboardModifiers() & Qt::ControlModifier &&
                  QApplication::keyboardModifiers() & Qt::ShiftModifier);
 
@@ -423,23 +429,11 @@ void GraphLogic::scaleUp()
     context.m_graphLogic = this;
     context.m_nodeList = &m_nodeList;
     context.m_activeNode = m_activeNode;
-    context.m_scale = qreal(1.2);
+    context.m_scale = qreal(0.2);
     context.m_subtree = subtree;
 
     QUndoCommand *scaleNodeCommand = new ScaleNodeCommand(context);
     m_undoStack->push(scaleNodeCommand);
-
-//    if (QApplication::keyboardModifiers() & Qt::ControlModifier &&
-//        QApplication::keyboardModifiers() & Qt::ShiftModifier)
-//    {
-//        QList <Node *> nodeList = m_activeNode->subtree();
-//        foreach(Node *node, nodeList)
-//            node->setScale(qreal(1.2), m_graphWidget->sceneRect());
-//    }
-//    else
-//    {
-//        m_activeNode->setScale(qreal(1.2),m_graphWidget->sceneRect());
-//    }
 }
 
 void GraphLogic::scaleDown()
@@ -450,6 +444,12 @@ void GraphLogic::scaleDown()
         return;
     }
 
+    if (m_activeNode->scale()-qreal(0.2) < qreal(0.1))
+    {
+        emit notification(tr("Too much scaling."));
+        return;
+    }
+
     bool subtree(QApplication::keyboardModifiers() & Qt::ControlModifier &&
                  QApplication::keyboardModifiers() & Qt::ShiftModifier);
 
@@ -457,24 +457,11 @@ void GraphLogic::scaleDown()
     context.m_graphLogic = this;
     context.m_nodeList = &m_nodeList;
     context.m_activeNode = m_activeNode;
-    context.m_scale = qreal(1 / 1.2);
+    context.m_scale = qreal(-0.2);
     context.m_subtree = subtree;
 
     QUndoCommand *scaleNodeCommand = new ScaleNodeCommand(context);
     m_undoStack->push(scaleNodeCommand);
-
-
-//    if (QApplication::keyboardModifiers() & Qt::ControlModifier &&
-//        QApplication::keyboardModifiers() & Qt::ShiftModifier)
-//    {
-//        QList <Node *> nodeList = m_activeNode->subtree();
-//        foreach(Node *node, nodeList)
-//            node->setScale(qreal(1 / 1.2),m_graphWidget->sceneRect());
-//    }
-//    else
-//    {
-//        m_activeNode->setScale(qreal(1 / 1.2),m_graphWidget->sceneRect());
-//    }
 }
 
 void GraphLogic::nodeColor()

src/graphwidget.cpp

@@ -50,12 +50,12 @@ GraphLogic *GraphWidget::graphLogic() const
 
 void GraphWidget::zoomIn()
 {
-    scaleView(qreal(1.2));
+    scaleView(qreal(0.2));
 }
 
 void GraphWidget::zoomOut()
 {
-    scaleView(qreal(1 / 1.2));
+    scaleView(qreal(-0.2));
 }
 
 // MainWindow::keyPressEvent passes all keyevent to here, except
@@ -101,14 +101,15 @@ void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)
     painter->drawRect(m_scene->sceneRect());
 }
 
-void GraphWidget::scaleView(qreal scaleFactor)
+void GraphWidget::scaleView(qreal factor)
 {
-    qreal factor = transform().scale(scaleFactor, scaleFactor).
-                                        mapRect(QRectF(0, 0, 1, 1)).width();
-
     // don't allow to scale up/down too much
-    if (factor < 0.2 || factor > 10)
+    qreal viewScale = transform().m11() + 1 + factor;
+    if (viewScale < qreal(1) || viewScale > qreal(10))
+    {
+        emit notification(tr("Too much zooming."));
         return;
+    }
 
-    scale(scaleFactor, scaleFactor);
+    scale(1 + factor, 1 + factor);
 }

src/mainwindow.cpp

@@ -30,9 +30,13 @@ MainWindow::MainWindow(QWidget *parent) :
     connect(m_graphicsView->graphLogic(), SIGNAL(contentChanged(const bool&)),
             this, SLOT(contentChanged(const bool&)));
 
+    connect(m_graphicsView, SIGNAL(notification(QString)),
+            this, SLOT(statusBarMsg(QString)));
+
     connect(m_graphicsView->graphLogic(), SIGNAL(notification(QString)),
             this, SLOT(statusBarMsg(QString)));
 
+
     // setup toolbars, don't show them
     setupMainToolbar();
     m_ui->mainToolBar->hide();

src/node.cpp

@@ -220,24 +220,19 @@ QColor Node::textColor() const
 
 void Node::setScale(const qreal &factor,const QRectF &sceneRect)
 {
-    // limit scale to a reasonable size
-//    if (factor * scale() < 0.4 ||
-//        factor * scale() > 4 )
-//        return;
-
     // cannot scale out the Node from the scene
     if (!sceneRect.contains(pos() +
                             boundingRect().bottomRight() * scale() * factor))
         return;
 
     prepareGeometryChange();
-    QGraphicsTextItem::setScale(factor * scale());
+    QGraphicsTextItem::setScale(factor + scale());
 
     // scale edges to this Node too
     foreach(EdgeElement element, m_edgeList)
     {
         if (!element.startsFromThisNode)
-            element.edge->setWidth(element.edge->width() * factor );
+            element.edge->setWidth(element.edge->width() + factor );
 
         element.edge->adjust();
     }

test/algorithmtests.cpp

@@ -33,16 +33,17 @@ void AlgorithmTests::calculateBiggestAngle()
 {
     MainWindow *mainWindow = new MainWindow;
     GraphWidget *graphWidget = new GraphWidget(mainWindow);
+    GraphLogic *graphLogic = new GraphLogic(graphWidget);
 
     // no edges
-    Node *node1 = new Node(graphWidget);
+    Node *node1 = new Node(graphLogic);
     node1->setPos(0,0);
     QCOMPARE(node1->calculateBiggestAngle(), Pi * 1.5);
 
 
     // one egde
     // 1
-    Node *node2 = new Node(graphWidget);
+    Node *node2 = new Node(graphLogic);
     node2->setPos(30,0);
 
     Edge *edge1 = new Edge(node1, node2);
@@ -65,12 +66,12 @@ void AlgorithmTests::calculateBiggestAngle()
     node2->setPos(30,0);
     edge1->m_angle = angleOfPoints(node1->pos(), node2->pos());
 
-    Node *node3 = new Node(graphWidget);
+    Node *node3 = new Node(graphLogic);
     node3->setPos(-30,0);
     Edge *edge2 = new Edge(node1, node3);
     edge2->m_angle = angleOfPoints(node1->pos(), node3->pos());
 
-    Node *node4 = new Node(graphWidget);
+    Node *node4 = new Node(graphLogic);
     node4->setPos(0, -30);
     Edge *edge3 = new Edge(node1, node4);
     edge3->m_angle = angleOfPoints(node1->pos(), node4->pos());
@@ -85,6 +86,7 @@ void AlgorithmTests::calculateBiggestAngle()
     delete node3;
     delete node4;
 
+    delete graphLogic;
     delete graphWidget;
     delete mainWindow;
 }