96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
#include "util/creatingSelector.h"
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#include "graphicsItem/graphicsRectItem.h"
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#include <QGraphicsSceneMouseEvent>
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#include <QGraphicsView>
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CreatingSelector::CreatingSelector(QObject *parent)
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: BaseSelector(parent)
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{
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m_type = ST_cerating;
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m_pCreatingItem = nullptr;
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m_scalBasePoint = QPointF();
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}
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CreatingSelector::~CreatingSelector()
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{
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}
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void CreatingSelector::mousePressEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene)
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{
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if (event->button() != Qt::LeftButton)
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return;
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scene->clearSelection();
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ms_ptMouseDown = event->scenePos();
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ms_ptMouseLast = event->scenePos();
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switch (m_creatingType) {
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case GIT_rect:
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m_pCreatingItem = new GraphicsRectItem(QRect(1, 1, 1, 1));
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break;
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case GIT_roundRect:
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m_pCreatingItem = new GraphicsRectItem(QRect(1, 1, 1, 1), true);
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break;
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default:
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break;
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}
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ms_ptMouseDown += QPoint(2, 2);
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m_pCreatingItem->setPos(event->scenePos());
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scene->addItem(m_pCreatingItem);
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m_pCreatingItem->setSelected(true);
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ms_nDragHandle = H_rightBottom;
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setCursor(scene, Qt::CrossCursor);
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}
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void CreatingSelector::mouseMoveEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene)
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{
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ms_ptMouseLast = event->scenePos();
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if (m_pCreatingItem)
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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 = m_pCreatingItem->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 = m_pCreatingItem->mapFromScene(ms_ptMouseDown) - m_scalBasePoint;
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QPointF lastDelta = m_pCreatingItem->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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m_pCreatingItem->resize(ms_nDragHandle, sx, sy, m_scalBasePoint);
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}
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}
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void CreatingSelector::mouseReleaseEvent(QGraphicsSceneMouseEvent* event, DesignerScene* scene)
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{
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if (event->scenePos() == (ms_ptMouseDown - QPoint(2, 2))) //最小拖动范围
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{
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if(m_pCreatingItem)
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{
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m_pCreatingItem->setSelected(false);
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scene->removeItem(m_pCreatingItem);
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delete m_pCreatingItem;
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}
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}
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else if (m_pCreatingItem && ms_ptMouseLast != ms_ptMouseDown)
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{
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m_pCreatingItem->updateCoordinate();
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emit scene->signalAddItem(m_pCreatingItem);
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}
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ms_nDragHandle = H_none;
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m_pCreatingItem = nullptr;
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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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