71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
#include "util/scalingSelector.h"
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#include <QGraphicsSceneMouseEvent>
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#include <QGraphicsView>
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#include <graphicsItem/graphicsBaseItem.h>
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ScalingSelector::ScalingSelector(FixedPortsModel* model,QObject *parent)
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: BaseSelector(model,parent)
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{
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m_type = ST_scaling;
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m_scalBasePoint = QPointF();
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}
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ScalingSelector::~ScalingSelector()
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{
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}
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void ScalingSelector::mousePressEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene,DiagramMode sceneMode)
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{
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BaseSelector::mousePressEvent(event,scene,sceneMode);
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}
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void ScalingSelector::mouseMoveEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene,DiagramMode sceneMode)
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{
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ms_ptMouseLast = event->scenePos();
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QList<QGraphicsItem *> items = scene->selectedItems();
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if (items.count() == 1)
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{
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GraphicsBaseItem* item = qgraphicsitem_cast<GraphicsBaseItem*>(items.first());
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if(item)
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{
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if(ms_nDragHandle != H_none)
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{
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if(m_scalBasePoint.isNull()) //基准点不能采用临时变量，因为handle的坐标也在不断变化，计算会出现问题
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{
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m_scalBasePoint = item->getSymmetricPointPos(ms_nDragHandle);
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if(m_scalBasePoint.x() == 0)
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m_scalBasePoint.setX(1);
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if(m_scalBasePoint.y() == 0)
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m_scalBasePoint.setY(1);
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}
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//计算缩放倍数
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QPointF iniDelta = item->mapFromScene(ms_ptMouseDown) - m_scalBasePoint;
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QPointF lastDelta = item->mapFromScene(ms_ptMouseLast) - m_scalBasePoint;
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double sx = lastDelta.x() / iniDelta.x();
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double sy = lastDelta.y() / iniDelta.y();
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item->resize(ms_nDragHandle, sx, sy, m_scalBasePoint);
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}
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}
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}
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}
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void ScalingSelector::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene,DiagramMode sceneMode)
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{
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QList<QGraphicsItem *> items = scene->selectedItems();
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if (items.count() == 1)
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{
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AbstractShape* item = qgraphicsitem_cast<AbstractShape*>(items.first());
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if(item && ms_ptMouseLast != ms_ptMouseDown)
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{
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item->updateCoordinate();
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}
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}
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ms_nDragHandle = H_none;
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m_scalBasePoint = QPointF();
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setCursor(scene, Qt::ArrowCursor);
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emit setWorkingSelector(ST_base);
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}
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