QT学习之路 - QPainter（24）

工程代码： 24.rar  


http://devbean.blog.51cto.com/448512/235332

#include <QApplication>
#include <QWidget>
#include <QPaintEvent>
#include <QPainter>

class PaintedWidget : public QWidget
{
public:
    PaintedWidget();
protected:
    void paintEvent(QPaintEvent *event);
};

PaintedWidget::PaintedWidget()
{
    resize(800,600);
    setWindowTitle(tr("Paint Demo"));
}

void PaintedWidget::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    painter.drawLine(80,100,650,500);

    painter.setPen(Qt::red);
    painter.drawRect(10,10,100,400);

    painter.setPen(QPen(Qt::green,5));
    painter.setBrush(Qt::blue);
    painter.drawEllipse(50,150,400,200);

}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    PaintedWidget w;
    w.show();
    return app.exec();
}