Example usage for com.google.gwt.canvas.dom.client Context2d save

Introduction

In this page you can find the example usage for com.google.gwt.canvas.dom.client Context2d save.

Prototype

public final native void save() ;

Source Link

Document

Saves the context's state.

Usage

From source file:org.catrobat.html5player.client.Scene.java

License:Open Source License

/**
 *
 * @param imageElement/*from  www .jav  a  2 s.  c  om*/
 * @param translateX
 * @param translateY
 * @param x
 * @param y
 * @param width
 * @param height
 * @param degrees
 * @param xSize
 * @param ySize
 */
public void drawImageElementBrightness(ImageElement imageElement, double translateX, double translateY,
        double x, double y, double width, double height, double degrees, double alpha, double brightness)
        throws JavaScriptException {
    Context2d context = sceneCanvas.getContext2d();
    context.save();
    context.setGlobalAlpha(alpha);
    context.translate(translateX, translateY);
    context.rotate(degrees * Math.PI / 180);

    try {
        Canvas adjustedImage = adjustImageBrightness(imageElement, brightness);
        context.drawImage(adjustedImage.getCanvasElement(), x, y, width, height);
        context.restore();
    } catch (JavaScriptException exception) {
        context.restore();
        throw exception;
    }
}

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From source file:org.catrobat.html5player.client.Scene.java

License:Open Source License

/**
 *
 *///from ww w . j a v  a  2  s  .c  o m
public void clearCanvas() {

    long start = System.currentTimeMillis();

    Context2d context = sceneCanvas.getContext2d();
    context.save();
    context.setFillStyle(fillColor);
    context.fillRect(0, 0, this.sceneWidth, this.sceneHeight);
    context.restore();

    CatrobatDebug.debug("clearCanvas-execution took " + (System.currentTimeMillis() - start) + " ms");
}

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From source file:org.geomajas.gwt2.example.client.sample.rendering.CanvasImageElement.java

License:Open Source License

@Override
public void paint(Canvas canvas, Matrix matrix) {
    /*/* w w  w.  j  a  v  a2s .c  o  m*/
    * paint image on canvas based on the original and with the transformations of the matrix.
    * */
    Context2d context2d = canvas.getContext2d();
    context2d.save();
    boolean xReversal = matrix.getXx() < 0;
    boolean yReversal = matrix.getYy() < 0;
    context2d.scale(xReversal ? -1 : 1, yReversal ? -1 : 1);
    double xValue = xReversal ? box.getMaxX() * -1 : box.getX();
    double yValue = yReversal ? box.getMaxY() * -1 : box.getY();
    context2d.drawImage(hiddenImageCanvas.getCanvasElement(), xValue, yValue, box.getWidth(), box.getHeight());
    context2d.restore();
}

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From source file:org.grailrtls.plunder.client.drawable.PassiveTiles.java

License:Open Source License

/**
 * Renders this objects tiles (if any) to the DrawableContext.
 * Since there are no images, uses drawing primitives to render
 * 2-d colored boxes.//from w  w  w.  j a v  a2  s  .com
 */
@Override
public void draw(Context2d context) {
    // FIXME: Proper solution for "out of date" data
    if (System.currentTimeMillis() - this.timestamp > 5000) {
        return;
    }

    context.save();
    context.setFillStyle("rgba(40,40,230,0.5)");

    for (Tile t : this.tiles) {
        float x1 = this.toCanvasX(t.x1);
        float x2 = this.toCanvasX(t.x2);
        float y1 = this.toCanvasY(t.y1);
        float y2 = this.toCanvasY(t.y2);

        context.fillRect(x1, y1, x2 - x1, y2 - y1);

    }

    context.restore();

}

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From source file:org.peergreen.vaadin.diagram.client.ui.IntermediateConnectorUI.java

License:Apache License

@Override
public void draw() {
    // Draw a line from the source port to the current mouse coordinates
    Context2d canvas = getCanvas();
    IPoint coordinates = getModel().getMouseCoordinates();

    canvas.save();
    canvas.beginPath();//from  w w  w. ja  v a 2s .c o  m
    canvas.setStrokeStyle("#000");
    canvas.moveTo(sourcePort.getConnectorX(), sourcePort.getConnectorY());
    canvas.lineTo(coordinates.getX(), coordinates.getY());
    canvas.closePath();
    canvas.stroke();
    canvas.restore();
}

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From source file:org.primordion.xholon.io.GridPanel.java

License:Open Source License

/**
 * Draw a polygon.//from   w w w  . j  a v a 2  s.c  om
 */
protected void drawPolygon(Context2d ctx, int x, int y, int xCoor[], int yCoor[], int sides) {
    ctx.save();
    ctx.translate(x, y);
    ctx.beginPath();
    ctx.moveTo(xCoor[0], yCoor[0]);
    for (int i = 1; i < sides; i++) {
        ctx.lineTo(xCoor[i], yCoor[i]);
    }
    ctx.lineTo(xCoor[0], yCoor[0]);
    ctx.fill();
    ctx.closePath();
    ctx.restore();
}

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From source file:org.primordion.xholon.io.GridPanel.java

License:Open Source License

/**
 * Draw a regular polygon.//w w  w  .  jav  a 2s .  co  m
 * Example:
<code>
context.beginPath();
polygon(context,350,125,100,6,-Math.PI/2);
context.fillStyle="rgba(51,128,255,0.75)";
context.fill();
context.stroke();
</code>
 * @param ctx A GWT Context2d object.
 * @param x X coordinate of the grid cell.
 * @param y Y coordinate of the grid cell.
 * @param radius 
 * @param sides The number of sides in the polygon. This value must be >= 3.
 * @param startAngle Angle in radians.
 * @param anticlockwise Draw clockwise (false) or anticlockwise (true).
 * @see http://www.storminthecastle.com/2013/07/24/how-you-can-draw-regular-polygons-with-the-html5-canvas-api/
 */
protected void drawPolygon(Context2d ctx, int x, int y, double radius, int sides, double startAngle,
        boolean anticlockwise) {
    if (sides < 3)
        return;
    double a = (Math.PI * 2) / sides;
    a = anticlockwise ? -a : a;
    ctx.save();
    ctx.translate(x, y);
    ctx.rotate(startAngle);
    ctx.moveTo(radius, 0);
    for (int i = 1; i < sides; i++) {
        //double xcoor = radius * Math.cos(a * i);
        //double ycoor = radius * Math.sin(a * i);
        //System.out.println("i:" + i + " xcoor:" + xcoor + " ycoor:" + ycoor);
        //ctx.lineTo(xcoor, ycoor);
        ctx.lineTo(radius * Math.cos(a * i), radius * Math.sin(a * i));
    }
    ctx.closePath();
    ctx.restore();
}

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From source file:org.teavm.samples.benchmark.gwt.BenchmarkStarter.java

License:Apache License

private void render() {
    Context2d context = canvas.getContext2d();
    context.setFillStyle("white");
    context.setStrokeStyle("grey");
    context.fillRect(0, 0, 600, 600);// w  w w  .  ja  va 2 s .  c o  m
    context.save();
    context.translate(0, 600);
    context.scale(1, -1);
    context.scale(100, 100);
    context.setLineWidth(0.01);
    for (Body body = scene.getWorld().getBodyList(); body != null; body = body.getNext()) {
        Vec2 center = body.getPosition();
        context.save();
        context.translate(center.x, center.y);
        context.rotate(body.getAngle());
        for (Fixture fixture = body.getFixtureList(); fixture != null; fixture = fixture.getNext()) {
            Shape shape = fixture.getShape();
            if (shape.getType() == ShapeType.CIRCLE) {
                CircleShape circle = (CircleShape) shape;
                context.beginPath();
                context.arc(circle.m_p.x, circle.m_p.y, circle.getRadius(), 0, Math.PI * 2, true);
                context.closePath();
                context.stroke();
            } else if (shape.getType() == ShapeType.POLYGON) {
                PolygonShape poly = (PolygonShape) shape;
                Vec2[] vertices = poly.getVertices();
                context.beginPath();
                context.moveTo(vertices[0].x, vertices[0].y);
                for (int i = 1; i < poly.getVertexCount(); ++i) {
                    context.lineTo(vertices[i].x, vertices[i].y);
                }
                context.closePath();
                context.stroke();
            }
        }
        context.restore();
    }
    context.restore();
}

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From source file:playn.html.HtmlCanvasLayerCanvas.java

License:Apache License

@Override
void paint(Context2d ctx, float parentAlpha) {
    ctx.save();
    transform(ctx);//from   w  ww. j ava 2s  .co  m

    ctx.setGlobalAlpha(parentAlpha * alpha);
    ctx.drawImage(canvas.canvas(), 0, 0);

    ctx.restore();
}

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From source file:playn.html.HtmlGroupLayerCanvas.java

License:Apache License

@Override
public void paint(Context2d ctx, float parentAlpha) {
    if (!visible())
        return;/* www. ja v a  2s. co m*/

    ctx.save();
    transform(ctx);
    render(ctx, parentAlpha * alpha);
    ctx.restore();
}

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