Painter : QPainter « Qt « C++

1. C++
2. Qt
3. QPainter

Painter

  

#include <QtGui>

int main(int argv, char **args)
{
    QApplication app(argv, args);

    QLinearGradient linearGrad(QPointF(100, 100), QPointF(200, 200));
    linearGrad.setColorAt(0, Qt::black);
    linearGrad.setColorAt(1, Qt::white);

    QBrush brush(linearGrad);

        QPainter painter;
        painter.setBrush(brush);          // set the yellow brush
        painter.setPen(Qt::NoPen);        // do not draw outline
        painter.drawRect(40,30, 200,100); // draw filled rectangle
        painter.setBrush(Qt::NoBrush);    // do not fill
        painter.setPen(Qt::black);            // set black pen, 0 pixel width
        painter.drawRect(10,10, 30,20);   // draw rectangle outline
        painter.end();                    // painting done

    QWidget widget;
    QPalette palette;
    palette.setBrush(widget.backgroundRole(), brush);
    widget.setPalette(palette);
    widget.show();

    return app.exec();
}

   
    
  

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