List of usage examples for com.google.gwt.canvas.dom.client Context2d setFillStyle
public final void setFillStyle(String fillStyleColor)
From source file:examples.geometry.containment.PolygonPolygonContainment.java
License:Open Source License
@Override protected AbstractControllableShape createControllableShape2(final Canvas canvas) { return new AbstractControllableShape(canvas) { @Override//w w w .j av a 2 s . c om public void createControlPoints() { addControlPoint(new Point(200, 200)); } @Override public Polygon createGeometry() { Point[] points = getControlPoints(); Polygon polygon = new Polygon(points[0].x - 30, points[0].y - 30, points[0].x + 80, points[0].y - 20, points[0].x - 20, points[0].y + 40); return polygon; } @Override public void drawShape() { Polygon polygon = createGeometry(); Context2d c = canvas.getContext2d(); CanvasDrawer.strokePath(polygon.toPath(), c); } @Override public void fillShape(CssColor color) { Polygon polygon = createGeometry(); Context2d c = canvas.getContext2d(); FillStrokeStyle style = c.getFillStyle(); c.setFillStyle(color.value()); CanvasDrawer.fillPath(polygon.toPath(), c); c.setFillStyle(style); } }; }
From source file:examples.geometry.containment.PolygonRectangleContainment.java
License:Open Source License
@Override protected AbstractControllableShape createControllableShape2(final Canvas canvas) { return new AbstractControllableShape(canvas) { private final double WIDTH = 50; private final double HEIGHT = 75; @Override/* w w w . j a va2 s. c om*/ public void createControlPoints() { addControlPoint(new Point(110, 70)); } @Override public Rectangle createGeometry() { Point[] points = getControlPoints(); return new Rectangle(points[0].x - WIDTH / 2, points[0].y - HEIGHT / 2, WIDTH, HEIGHT); } @Override public void drawShape() { Rectangle rect = createGeometry(); Context2d context2d = canvas.getContext2d(); context2d.rect(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight()); context2d.stroke(); } @Override public void fillShape(CssColor color) { Rectangle rect = createGeometry(); Context2d context2d = canvas.getContext2d(); FillStrokeStyle style = context2d.getFillStyle(); context2d.setFillStyle(color.value()); context2d.fillRect(rect.getX(), rect.getY(), rect.getWidth(), rect.getHeight()); context2d.setFillStyle(style); } }; }
From source file:examples.geometry.demos.CAGExample.java
License:Open Source License
protected ControllableShape[] createShapes(Canvas canvas, EventBus eventBus) { final ControllableShape csTriangle = new ControllableShape(canvas, eventBus) { {//w w w . j a v a 2 s . co m addControlPoints(new Point(100, 150), new Point(350, 120), new Point(200, 300)); } @Override public Polygon getShape() { return new Polygon(getPoints()); } @Override public void onDraw(Canvas gc) { // we draw them later } }; final ControllableShape csEllipse = new ControllableShape(canvas, eventBus) { { addControlPoints(new Point(280, 230), new Point(380, 280)); } @Override public Ellipse getShape() { Point[] points = getPoints(); double a = Math.abs(points[0].x - points[1].x); double b = Math.abs(points[0].y - points[1].y); return new Ellipse(points[0].x - a, points[0].y - b, 2 * a, 2 * b); } @Override public void onDraw(Canvas gc) { // we draw them later } @Override public void onMove(int dragPointIndex, double oldX, double oldY) { if (dragPointIndex == 0) { double dx = controlPoints.get(0).getX() - oldX; double dy = controlPoints.get(0).getY() - oldY; ControlPoint cp = controlPoints.get(1); cp.setX(cp.getX() + dx); cp.setY(cp.getY() + dy); } } }; ControllableShape other = new ControllableShape(canvas, eventBus) { @Override public IGeometry getShape() { return null; // does not control a geometry } @Override public void onDraw(Canvas canvas) { Context2d context = canvas.getContext2d(); Path trianglePath = csTriangle.getShape().toPath(); Path ellipsePath = csEllipse.getShape().toPath(); Path intersection = Path.intersect(trianglePath, ellipsePath); context.setFillStyle("red"); CanvasDrawer.fillPath(trianglePath, context); context.setFillStyle("green"); CanvasDrawer.fillPath(ellipsePath, context); context.setFillStyle("yellow"); CanvasDrawer.fillPath(intersection, context); } }; return new ControllableShape[] { csTriangle, csEllipse, other }; }
From source file:examples.geometry.demos.RegionClippingExample.java
License:Open Source License
@Override protected ControllableShape[] createShapes(Canvas canvas, EventBus eventBus) { return new ControllableShape[] { new ControllableShape(canvas, eventBus) { {/*from w ww . j a v a 2s .c om*/ addControlPoints(new Point(100, 100), new Point(200, 200)); addControlPoints(new Point(150, 150), new Point(250, 250)); } @Override public Region getShape() { Point[] cp = getPoints(); Region region = new Region(new Rectangle(cp[0], cp[1]), new Rectangle(cp[2], cp[3])); return region; } @Override public void onDraw(Canvas canvas) { Context2d context = canvas.getContext2d(); Region region = getShape(); context.save(); context.beginPath(); Rectangle rr = region.getBounds(); context.rect(rr.getX(), rr.getY(), rr.getWidth(), rr.getHeight()); // context.fill(); context.clip(); for (int y = 0; y < 800; y += 20) { context.fillText( "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz", 20, y); } context.restore(); context.setFillStyle("blue"); context.setGlobalAlpha(0.5); context.beginPath(); for (Rectangle r : region.getShapes()) { context.fillRect(r.getX(), r.getY(), r.getWidth(), r.getHeight()); } context.closePath(); context.setFillStyle("black"); context.setGlobalAlpha(1); } } }; }
From source file:examples.geometry.demos.RegionOutlineExample.java
License:Open Source License
@Override protected ControllableShape[] createShapes(Canvas canvas, EventBus eventBus) { return new ControllableShape[] { new ControllableShape(canvas, eventBus) { {//from www . j ava 2s . c o m addControlPoints(new Point(100, 50), new Point(300, 100)); addControlPoints(new Point(250, 200), new Point(350, 330)); addControlPoints(new Point(100, 200), new Point(190, 325)); addControlPoints(new Point(150, 300), new Point(280, 380)); } @Override public Region getShape() { Point[] cp = getPoints(); Rectangle[] rectangles = new Rectangle[cp.length / 2]; for (int i = 0; i < rectangles.length; i++) { rectangles[i] = new Rectangle(cp[2 * i], cp[2 * i + 1]); } return new Region(rectangles); } @Override public void onDraw(Canvas canvas) { Context2d context = canvas.getContext2d(); Region region = getShape(); context.setFillStyle("rgba(0, 0, 255, 0.5)"); context.setGlobalAlpha(0.5); context.beginPath(); for (Rectangle r : region.getShapes()) { context.fillRect(r.getX(), r.getY(), r.getWidth(), r.getHeight()); } context.closePath(); // gc.setAlpha(255); context.setFillStyle("rgba(255, 255, 255, 1)"); context.setGlobalAlpha(1); // gc.setForeground(Display.getCurrent().getSystemColor( // SWT.COLOR_RED)); // for (Rectangle r : region.getShapes()) { // gc.drawRectangle(r.toSWTRectangle()); // } // gc.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK)); context.beginPath(); for (Line l : region.getOutlineSegments()) { Point p1 = l.getP1(); Point p2 = l.getP2(); context.moveTo(p1.x, p1.y); context.lineTo(p2.x, p2.y); context.stroke(); } context.closePath(); } } }; }
From source file:gov.nist.spectrumbrowser.client.SensorDataStream.java
License:Open Source License
@Override public void draw() { try {/*from w ww.ja va 2s .c o m*/ // TODO Auto-generated method stub verticalPanel.clear(); drawMenuItems(); HorizontalPanel spectrogramPanel = new HorizontalPanel(); colorMap = new ColorMap((int) maxPower, (int) minPower); verticalPanel.add(spectrogramPanel); frequencyValuesCanvas = Canvas.createIfSupported(); frequencyValuesCanvas.setWidth(100 + "px"); frequencyValuesCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); frequencyValuesCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); frequencyValuesCanvas.setCoordinateSpaceWidth(100); spectrogramCanvas = Canvas.createIfSupported(); spectrogramCanvas.setTitle("Click to freeze/unfreeze"); spectrogramCanvas.setWidth(SpectrumBrowser.SPEC_WIDTH + "px"); spectrogramCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); spectrogramCanvas.setCoordinateSpaceWidth(SpectrumBrowser.SPEC_WIDTH); spectrogramCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); spectrogramCanvas.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { isFrozen = !isFrozen; if (isFrozen) { freezeButton.setText("Unfreeze"); } else { freezeButton.setText("Freeze"); } } }); spectrogramPanel.add(frequencyValuesCanvas); spectrogramPanel.add(spectrogramCanvas); spectrogramPanel.setBorderWidth(3); // Draw the colorbar canvas. HorizontalPanel colorbarFrame = new HorizontalPanel(); colorbarFrame.setBorderWidth(3); Canvas colorbarCanvas = Canvas.createIfSupported(); Canvas colorbarTextCanvas = Canvas.createIfSupported(); colorbarCanvas.setWidth(30 + "px"); colorbarCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); colorbarCanvas.setCoordinateSpaceWidth(30); colorbarTextCanvas.setWidth(30 + "px"); colorbarCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); colorbarTextCanvas.setCoordinateSpaceHeight(SpectrumBrowser.SPEC_HEIGHT); colorbarTextCanvas.setHeight(SpectrumBrowser.SPEC_HEIGHT + "px"); colorbarTextCanvas.setCoordinateSpaceWidth(30); int nStops = colorMap.getColorStopCount(); colorbarFrame.add(colorbarCanvas); colorbarFrame.add(colorbarTextCanvas); spectrogramPanel.add(colorbarFrame); verticalPanel.add(spectrogramPanel); double rectHeight = (double) SpectrumBrowser.SPEC_HEIGHT / (double) nStops; int i = 0; for (ColorStop colorStop : colorMap.getColorStops()) { CssColor color = colorStop.cssColor; Context2d context = colorbarCanvas.getContext2d(); context.setFillStyle(color); double y = SpectrumBrowser.SPEC_HEIGHT - (i + 1) * rectHeight; context.fillRect(0, y, 30, (int) rectHeight); Context2d textContext = colorbarTextCanvas.getContext2d(); textContext.setTextAlign(TextAlign.LEFT); textContext.fillText(Integer.toString((int) colorStop.stopValue), 0, (int) (y + rectHeight / 2)); i++; } occupancyPanel = new HorizontalPanel(); VerticalPanel pad = new VerticalPanel(); pad.setWidth("25px"); occupancyPanel.add(pad); spectrumPanel = new HorizontalPanel(); ChartLoader chartLoader = new ChartLoader(ChartPackage.CORECHART); chartLoader.loadApi(new Runnable() { @Override public void run() { chartApiLoaded = true; } }); verticalPanel.add(occupancyPanel); verticalPanel.add(spectrumPanel); context2d = spectrogramCanvas.getContext2d(); openWebSocket(); } catch (Throwable th) { logger.log(Level.SEVERE, "ERROR drawing screen", th); } }
From source file:gwtcog.examples.client.neural.neat.boxes.DisplayBoxesPanel.java
License:Apache License
public void paint() {//(Graphics g) { Context2d g = canvas.getContext2d(); NEATGenome genome = (NEATGenome) this.pop.getBestGenome(); Substrate substrate = SubstrateFactory.factorSandwichSubstrate(resolution, resolution); HyperNEATCODEC codec = new HyperNEATCODEC(); NEATNetwork phenotype = (NEATNetwork) codec.decode(this.pop, substrate, genome); TrialEvaluation trial = new TrialEvaluation(phenotype, this.testCase); IntPair actualPos = trial.query(resolution); // clear what was there before //g.setColor(Color.white); g.setFillStyle("white"); g.fillRect(0, 0, 400, 400);/*from ww w .j av a2 s.c o m*/ // int boxWidth = 400 / resolution; int boxHeight = 400 / resolution; double delta = 2.0 / resolution; int index = 0; for (int row = 0; row < resolution; row++) { double y = -1 + (row * delta); int boxY = row * boxHeight; for (int col = 0; col < resolution; col++) { double x = -1 + (col * delta); int boxX = col * boxWidth; if (this.testCase.getPixel(x, y) > 0) { //g.setColor(Color.blue); g.setFillStyle("blue"); g.fillRect(boxX, boxY, boxWidth, boxHeight); } else { double d = trial.getOutput().getData(index); int c = trial.normalize(d, 255); String hex = Integer.toHexString(c); if (hex.length() == 1) { hex = "0" + hex; } String color = "#ff" + hex + "ff"; g.setFillStyle(color); g.fillRect(boxX, boxY, boxWidth, boxHeight); g.setStrokeStyle("black"); g.strokeRect(boxX, boxY, boxWidth, boxHeight); g.strokeRect(boxX + 1, boxY + 1, boxWidth - 2, boxHeight - 2); } index++; } } g.setFillStyle("red"); g.fillRect(actualPos.getX() * boxWidth, actualPos.getY() * boxHeight, boxWidth, boxHeight); }
From source file:jetbrains.jetpad.projectional.domUtil.TextMetricsCalculator.java
License:Apache License
private static int measureHeight(Font font, String text) { Canvas canvas = canvas();/*from www .j a v a 2 s . c o m*/ Context2d ctx = canvas.getContext2d(); ctx.setFont(getFontString(font)); ctx.setFillStyle("rgb(255, 0, 0)"); int width = (int) ctx.measureText(text).getWidth(); int canvasHeight = font.getSize() * 2; canvas.setHeight(canvasHeight + "px"); canvas.setHeight(font.getSize() * 2 + "px"); canvas.setWidth(width + "px"); ctx.fillText(text, 0, font.getSize()); ImageData data = ctx.getImageData(0, 0, width, canvasHeight); int firstY = canvasHeight - 1; int lastY = 0; for (int x = 0; x < width; x++) { for (int y = 0; y < canvasHeight; y++) { int red = data.getRedAt(x, y); if (red != 0) { if (firstY > y) { firstY = y; } if (lastY < y) { lastY = y; } } } } return lastY - firstY; }
From source file:nl.mpi.tg.eg.experiment.client.view.ColourPickerCanvasView.java
License:Open Source License
private void sizeAndPaintCanvases(final int canvasHeight, final int canvasWidth, final int barWidth) { this.canvasHeight = canvasHeight; this.canvasWidth = canvasWidth; mainCanvas.setCoordinateSpaceHeight(canvasHeight); mainCanvas.setCoordinateSpaceWidth(canvasWidth); mainCanvas.setSize(canvasWidth + "px", canvasHeight + "px"); hueCanvas.setCoordinateSpaceHeight(canvasHeight); hueCanvas.setCoordinateSpaceWidth(barWidth); hueCanvas.setSize(barWidth + "px", canvasHeight + "px"); final Context2d hueContext2d = hueCanvas.getContext2d(); CanvasGradient hueGradient = hueContext2d.createLinearGradient(0, 0, 0, canvasHeight); for (double stop = 0; stop <= 10; stop += 0.005) { hueGradient.addColorStop(stop * 0.1f, "hsl(" + 36 * stop + ",100%,50%)"); }//from ww w.j a v a 2 s . c o m hueContext2d.setFillStyle(hueGradient); hueContext2d.fillRect(0, 0, barWidth, canvasHeight); }
From source file:nl.mpi.tg.eg.experiment.client.view.ColourPickerCanvasView.java
License:Open Source License
synchronized private void setHue(String colourCss) { currentHueCss = colourCss;//from www. j av a2 s .com // " Android clearRect / fillRect bug" ??? // GWT documentation: JavaScript interpreters are single-threaded, so while GWT silently accepts the synchronized keyword, it has no real effect. // So we are using a simple boolean which should be adequate most of the time. We could use a timer call back, but we want to keep this simple. // However the browser is probably only single threaded anyway. if (hueChangeInProgress) { return; } hueChangeInProgress = true; final Context2d mainContext2dA = mainCanvas.getContext2d(); CanvasGradient linearColour = mainContext2dA.createLinearGradient(0, 0, canvasWidth, 0); linearColour.addColorStop(1f, "white"); linearColour.addColorStop(0f, colourCss); mainContext2dA.setFillStyle(linearColour); mainContext2dA.fillRect(0, 0, canvasWidth, canvasHeight); // todo: remove the second context get if it proves unhelpful witht the samsung 4.2.2 issue final Context2d mainContext2dB = mainCanvas.getContext2d(); CanvasGradient linearGrey = mainContext2dB.createLinearGradient(0, 0, 0, canvasHeight); linearGrey.addColorStop(1f, "black"); linearGrey.addColorStop(0f, "rgba(0,0,0,0)"); mainContext2dB.setFillStyle(linearGrey); mainContext2dB.fillRect(0, 0, canvasWidth, canvasHeight); hueChangeInProgress = false; }