64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
#include "myview.h"
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#include <QWheelEvent>
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#include "picscene.h"
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MyView::MyView(QWidget *parent) :
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QGraphicsView(parent)
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{
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zoomRatio = 1;
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//setDragMode(QGraphicsView::ScrollHandDrag);//手型拖动
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//setAlignment(Qt::AlignLeft | Qt::AlignTop);
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//setFocusPolicy( Qt::NoFocus );
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}
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void MyView::ZoomOut(void)
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{
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if(zoomRatio < 3)
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{
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zoomRatio++;
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scale(2,2);
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}
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}
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void MyView::ZoomIn(void)
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{
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if(zoomRatio > 0)
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{
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zoomRatio--;
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scale(0.5,0.5);
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}
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}
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//void MyView::wheelEvent(QWheelEvent*event) //滚轮事件
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//{
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//// if(event->delta() > 0) //如果鼠标滚轮远离使用者，则delta()返回正值
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//// scale(0.5,0.5); //视图缩放
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//// else scale(2,2);
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//}
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//void MyView::mousePressEvent(QMouseEvent*event)
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//{
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//// rotate(90); //视图旋转顺时针90度
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//}
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void MyView::keyPressEvent(QKeyEvent *event)
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{
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//event->accept();
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//parent()->event((QEvent*) event);
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if (event->key() == Qt::Key_Left || event->key() == Qt::Key_Right || event->key() == Qt::Key_Up || event->key() == Qt::Key_Down)
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{
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// 处理上下键事件
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PicScene* picScene = dynamic_cast<PicScene*>(this->scene());
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if(picScene)
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{
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picScene->keyPressEvent(event);
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}
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}
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else
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{
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// 其他键事件交给父类处理
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QGraphicsView::keyPressEvent(event);
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}
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}
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