[提问]請問各位大大 有關pixmap的問題 [复制链接]

    #include "frame.h"
    #include "ui_frame.h"
    #include <QPainter>
    #include <QPixmap>
    QPixmap *px;
    Frame::Frame(QWidget *parent) :
        QFrame(parent),
        ui(new Ui::Frame)
    {
        ui->setupUi(this);
        draw();
    }
    Frame::~Frame()
    {
        delete ui;
    }
    void Frame::draw()
    {
        QPixmap pm(this->width(),this->height());
        QPainter p(&pm);
        p.drawLine(0,0,100,100);
        px=new QPixmap(pm);
        this->update();
    }
    void Frame::paintEvent(QPaintEvent *e)
    {
        QPainter p1(this);
        p1.drawPixmap(0,0,this->width(),this->height(),*px);
        //p1.drawImage(0,0,px->toImage());
    }

引用楼主tonylin于2012-08-03 15:51发表的 請問各位大大 有關pixmap的問題 :
當我執行之後
在放大解析度就變很差 請問有沒有什麼辦法可以解決
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