Home | All Classes | Main Classes | Annotated | Grouped Classes | Functions

cannonfield.cpp Example File
tutorial/t9/cannonfield.cpp

    /****************************************************************
    **
    ** Implementation CannonField class, Qt tutorial 9
    **
    ****************************************************************/

    #include <QPainter>

    #include "cannonfield.h"

    CannonField::CannonField(QWidget *parent)
        : QWidget(parent)
    {
        ang = 45;
        setPalette(QPalette(QColor(250, 250, 200)));
    }

    void CannonField::setAngle(int angle)
    {
        if (angle < 5)
            angle = 5;
        if (angle > 70)
            angle = 70;
        if (ang == angle)
            return;
        ang = angle;
        update();
        emit angleChanged(ang);
    }

    void CannonField::paintEvent(QPaintEvent * /* event */)
    {
        QPainter painter(this);

        painter.setPen(Qt::NoPen);
        painter.setBrush(Qt::blue);

        painter.translate(0, rect().height());
        painter.drawPie(QRect(-35, -35, 70, 70), 0, 90 * 16);
        painter.rotate(-ang);
        painter.drawRect(QRect(33, -4, 15, 8));
    }


Copyright © 2004 Trolltech Trademarks
Qt 4.0.0-b1