Example usage for com.google.gwt.animation.client AnimationScheduler requestAnimationFrame

Introduction

In this page you can find the example usage for com.google.gwt.animation.client AnimationScheduler requestAnimationFrame.

Prototype

public abstract AnimationHandle requestAnimationFrame(AnimationCallback callback, Element element);

Source Link

Document

Schedule an animation, letting the browser decide when to trigger the next step in the animation.

Usage

From source file:com.philbeaudoin.quebec.client.main.GameView.java

License:Apache License

@Inject
public GameView(AnimationScheduler animationScheduler, SpriteResources spriteResources) {
    this.animationScheduler = animationScheduler;
    this.spriteResources = spriteResources;
    widget = binder.createAndBindUi(this);
    canvas = fullCanvas.asCanvas();//from ww  w .j av  a 2 s .co m
    context = canvas.getContext2d();

    staticLayerCanvas = Canvas.createIfSupported();
    staticLayerContext = staticLayerCanvas.getContext2d();

    fullCanvas.addResizeHandler(new ResizeHandler() {
        @Override
        public void onResize(ResizeEvent event) {
            int width = canvas.getCoordinateSpaceWidth();
            int height = canvas.getCoordinateSpaceHeight();
            context.setFillStyle("#ddd");
            context.setStrokeStyle("#000");
            context.rect(0, 0, width, height);
            context.fill();
            context.stroke();
            forceRefresh = true;
        }
    });

    final AnimationCallback animationCallback = new AnimationCallback() {
        @Override
        public void execute(double timestamp) {
            GameView.this.animationScheduler.requestAnimationFrame(this, canvas.getElement());
            doUpdate(timestamp);
        }
    };
    animationScheduler.requestAnimationFrame(animationCallback, canvas.getElement());

    fullCanvas.addMouseMoveHandler(new MouseMoveHandler() {
        @Override
        public void onMouseMove(MouseMoveEvent event) {
            double height = canvas.getOffsetHeight();
            lastMouseX = event.getRelativeX(fullCanvas.getElement()) / height;
            lastMouseY = event.getRelativeY(fullCanvas.getElement()) / height;
            presenter.onMouseMove(lastMouseX, lastMouseY, time);
        }
    });

    fullCanvas.addMouseDownHandler(new MouseDownHandler() {
        @Override
        public void onMouseDown(MouseDownEvent event) {
            double height = canvas.getOffsetHeight();
            lastMouseX = event.getRelativeX(fullCanvas.getElement()) / height;
            lastMouseY = event.getRelativeY(fullCanvas.getElement()) / height;
            presenter.onMouseClick(lastMouseX, lastMouseY, time);
        }
    });
}

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