items.cpp

Linux窗口程序设计__Qt4精彩实例分析上面的源代码第二部分.以循序渐进的方式进行源代码,包括Qt4下面的图形与图画对话框QMainWindow的源代码.

#include "items.h"
#include <QtGui>

PixItem::PixItem(QPixmap *pixmap)
{   

    pix = *pixmap;
}

QRectF
PixItem::boundingRect() const
{
                  
    return QRectF(-2-pix.width()/2,-2-pix.height()/2,pix.width()+4,pix.height()+4);
}

void
PixItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{

    painter->drawPixmap(-pix.width()/2,-pix.height()/2,pix);
}

void
PixItem::timerEvent(QTimerEvent * )
{
    update();
}

void
PixItem::mousePressEvent(QGraphicsSceneMouseEvent * e)
{
    update();
    QGraphicsItem::mousePressEvent(e);
}

void
PixItem::mouseReleaseEvent(QGraphicsSceneMouseEvent * e)
{
    update();
    QGraphicsItem::mouseReleaseEvent(e);
}