关于QPixmap

关于QPixmap

#include "windows.h"

#include <QColor>

#include <QPainter>

#include <QString>

windows::windows(QWidget *parent)

    : QWidget(parent)

{

    resize(800,600);

    pixmap = QPixmap(100,50);

    background = QPixmap("background.bmp");

    x = -1;

    y = -1;

}

windows::~windows()

{

}

void windows::mouseMoveEvent(QMouseEvent *event){

    x = event->x();

    y = event->y();

    pixmap.fill(QColor(255,255,255,127));

    QPainter painter(&pixmap);

    painter.setPen(QColor(255,0,0));

    painter.drawText(20,40,QString("%1").arg(x) + "," + QString("%1").arg(y));

    update();

}

void windows::paintEvent(QPaintEvent *event){

    QPainter painter(this);

    painter.drawPixmap(0,0,background);

    painter.drawPixmap(x,y,pixmap);

}