#include "myview.h"
#include <QWheelEvent>
#include "picscene.h"
#include <QDebug>
MyView::MyView(QWidget *parent) :
    QGraphicsView(parent)
{
    zoomRatio = 1;
    //setDragMode(QGraphicsView::ScrollHandDrag);//手型拖动
    //setAlignment(Qt::AlignLeft | Qt::AlignTop);
    //setFocusPolicy( Qt::NoFocus );
}
// static float a = 1.615;
static float a = 1.64;
void MyView::ZoomOut(void)
{
    if(zoomRatio < 6)
    {
        zoomRatio++;
//        scale(2,2);
        scale(a,a);
    }
}

void MyView::ZoomIn(void)
{
    if(zoomRatio > 2)
    {
        zoomRatio--;
        scale(1/a,1/a);
    }
}

//void MyView::wheelEvent(QWheelEvent*event)  //滚轮事件
//{
////   if(event->delta() > 0)  //如果鼠标滚轮远离使用者，则delta()返回正值
////       scale(0.5,0.5);  //视图缩放
////   else scale(2,2);
//}


//void MyView::mousePressEvent(QMouseEvent*event)
//{
////   rotate(90);  //视图旋转顺时针90度
//}

void MyView::keyPressEvent(QKeyEvent *event)
{
    //event->accept();
    //parent()->event((QEvent*) event);
    if (event->key() == Qt::Key_Left || event->key() == Qt::Key_Right || event->key() == Qt::Key_Up || event->key() == Qt::Key_Down)
    {
               // 处理上下键事件
               PicScene* picScene = dynamic_cast<PicScene*>(this->scene());
               if(picScene)
               {
                    picScene->keyPressEvent(event);
               }
     }
     else
     {
               // 其他键事件交给父类处理
               QGraphicsView::keyPressEvent(event);
     }
}