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import org.kde.qt.*;
public class CannonField extends QWidget {
private int ang;
private int f;
public CannonField(QWidget parent, String name) {
super(parent, name);
ang = 45;
setPalette(new QPalette(new QColor(250, 250, 200)));
}
public int angle() {
return ang;
}
public void setAngle(int degrees) {
if (degrees < 5)
degrees = 5;
if (degrees > 70)
degrees = 70;
if (ang == degrees)
return;
ang = degrees;
repaint();
emit("angleChanged", ang);
}
public int force() {
return f;
}
public void setForce(int newton) {
if (newton < 0)
newton = 0;
if (f == newton)
return;
f = newton;
emit("forceChanged", f);
}
private QRect cannonRect() {
QRect r = new QRect(0, 0, 50, 50);
r.moveBottomLeft(rect().bottomLeft());
return r;
}
public void paintEvent(QPaintEvent e) {
if (!e.rect().intersects(cannonRect()))
return;
QRect cr = cannonRect();
QPixmap pix = new QPixmap(cr.size());
pix.fill(new QColor(250, 250, 200));
QPainter p = new QPainter(pix);
p.setBrush(blue());
p.setPen(NoPen);
p.translate(0, pix.height() - 1);
p.drawPie(new QRect(-35,-35, 70, 70), 0, 90*16);
p.rotate(-ang);
p.drawRect(new QRect(33, -4, 15, 8));
p.end();
p.begin(this);
p.drawPixmap(cr.topLeft(), pix);
}
public QSizePolicy sizePolicy() {
return new QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding);
}
}
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