cannonfield.cpp Example File
tutorial/t8/cannonfield.cpp
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/****************************************************************
**
** Implementation CannonField class, Qt tutorial 8
**
****************************************************************/
#include <QPainter>
#include "cannonfield.h"
CannonField::CannonField(QWidget *parent)
: QWidget(parent)
{
currentAngle = 45;
setPalette(QPalette(QColor(250, 250, 200)));
}
void CannonField::setAngle(int angle)
{
if (angle < 5)
angle = 5;
if (angle > 70)
angle = 70;
if (currentAngle == angle)
return;
currentAngle = angle;
update();
emit angleChanged(currentAngle);
}
void CannonField::paintEvent(QPaintEvent * /* event */)
{
QPainter painter(this);
painter.drawText(200, 200, "Angle = " + QString::number(currentAngle));
}