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141 lines
3.0 KiB
141 lines
3.0 KiB
import org.trinitydesktop.qt.*;
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public class CannonField extends TQWidget {
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private int ang;
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private int f;
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private int timerCount;
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private TQTimer autoShootTimer;
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private float shoot_ang;
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private float shoot_f;
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private final TQRect barrelRect = new TQRect(33, -4, 15, 8);
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public CannonField(TQWidget parent, String name) {
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super(parent, name);
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ang = 45;
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f = 0;
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timerCount = 0;
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autoShootTimer = new TQTimer(this, "movement handler");
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connect(autoShootTimer, SIGNAL("timeout()"),
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this, SLOT("moveShot()"));
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shoot_ang = 0;
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shoot_f = 0;
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setPalette(new TQPalette(new TQColor(250, 250, 200)));
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}
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public int angle() {
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return ang;
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}
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public void setAngle(int degrees) {
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if (degrees < 5)
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degrees = 5;
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if (degrees > 70)
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degrees = 70;
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if (ang == degrees)
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return;
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ang = degrees;
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repaint();
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emit("angleChanged", ang);
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}
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public int force() {
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return f;
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}
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public void setForce(int newton) {
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if (newton < 0)
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newton = 0;
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if (f == newton)
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return;
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f = newton;
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emit("forceChanged", f);
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}
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public void shoot() {
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if (autoShootTimer.isActive())
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return;
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timerCount = 0;
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shoot_ang = ang;
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shoot_f = f;
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autoShootTimer.start(50);
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}
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public void moveShot() {
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TQRegion r = new TQRegion(shotRect());
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timerCount++;
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TQRect shotR = shotRect();
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if (shotR.x() > width() || shotR.y() > height())
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autoShootTimer.stop();
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else
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r = r.unite(new TQRegion(shotR));
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repaint(r);
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}
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public void paintEvent(TQPaintEvent e) {
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TQRect updateR = e.rect();
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TQPainter p = new TQPainter(this);
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if (updateR.intersects(cannonRect()))
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paintCannon(p);
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if (autoShootTimer.isActive() && updateR.intersects(shotRect()))
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paintShot(p);
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}
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private void paintShot(TQPainter p) {
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p.setBrush(black());
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p.setPen(NoPen);
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p.drawRect(shotRect());
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}
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private void paintCannon(TQPainter p) {
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TQRect cr = cannonRect();
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TQPixmap pix = new TQPixmap(cr.size());
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pix.fill(new TQColor(250, 250, 200));
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TQPainter tmp = new TQPainter(pix);
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tmp.setBrush(blue());
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tmp.setPen(NoPen);
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tmp.translate(0, pix.height() - 1);
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tmp.drawPie(new TQRect(-35,-35, 70, 70), 0, 90*16);
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tmp.rotate(-ang);
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tmp.drawRect(barrelRect);
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tmp.end();
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p.drawPixmap(cr.topLeft(), pix);
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}
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private TQRect cannonRect() {
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TQRect r = new TQRect(0, 0, 50, 50);
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r.moveBottomLeft(rect().bottomLeft());
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return r;
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}
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private TQRect shotRect() {
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final double gravity = 4;
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double time = timerCount / 4.0;
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double velocity = shoot_f;
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double radians = shoot_ang*3.14159265/180;
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double velx = velocity*Math.cos(radians);
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double vely = velocity*Math.sin(radians);
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double x0 = (barrelRect.right() + 5)*Math.cos(radians);
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double y0 = (barrelRect.right() + 5)*Math.sin(radians);
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double x = x0 + velx*time;
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double y = y0 + vely*time - 0.5*gravity*time*time;
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TQRect r = new TQRect(0, 0, 6, 6);
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r.moveCenter(new TQPoint((int) x, height() - 1 - (int) y));
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return r;
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}
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public TQSizePolicy sizePolicy() {
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return new TQSizePolicy(TQSizePolicy.Expanding, TQSizePolicy.Expanding);
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}
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}
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