Examples of javafx.scene.canvas.GraphicsContext

javafx.scene.canvas.GraphicsContext


    private void renderMethodNode(ProfileNode profileNode, boolean empty) {
        if (!empty && isVisible()) {
            setText(renderMethod(profileNode.getMethod()));
            Canvas canvas = new Canvas(IMAGE_WIDTH, IMAGE_HEIGHT);
            GraphicsContext context = canvas.getGraphicsContext2D();
            context.setFill(Color.BLACK);
            context.strokeRect(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT);


            double timeShare = profileNode.getTotalTimeShare();
            double scaledShare = timeShare * IMAGE_WIDTH;
            double xStart = IMAGE_WIDTH - scaledShare;
            context.setFill(Color.GREEN);
            context.fillRect(xStart, 0, scaledShare, IMAGE_HEIGHT);


            Color color = timeShare > 0.5 ? WHEAT : RED;
            context.setFill(color);
            context.fillText(renderTimeShare(timeShare), TEXT_HORIZONTAL_INSET, TEXT_VERTICAL_INSET);


            setGraphic(canvas);
        }
    }

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            setText("");
        } else {
            final double scaledShare = timeShare * width;


            Canvas canvas = new Canvas(width, height);
            GraphicsContext context = canvas.getGraphicsContext2D();
            context.setFill(timeTakenColor);
            context.fillRect(0, 0, scaledShare, height);
            setGraphic(canvas);
        }
    }

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        primaryStage.setTitle("Hello World!");


        Group root = new Group();
        final Canvas canvas = new Canvas(width, height);
        final GraphicsContext gc = canvas.getGraphicsContext2D();


        VBox vBox = new VBox();
        vBox.getChildren().addAll(canvas);


        root.getChildren().add(vBox);

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        // adjust position of canvas in relation to shape
        CANVAS.setLayoutX(SHAPE.getLayoutBounds().getMinX());
        CANVAS.setLayoutY(SHAPE.getLayoutBounds().getMinY());
        CANVAS.setClip(CLIP);
        // create the gradient with the given stops
        final GraphicsContext CTX          = CANVAS.getGraphicsContext2D();
        final Bounds          BOUNDS       = SHAPE.getLayoutBounds();
        final Point2D         CENTER       = new Point2D(BOUNDS.getWidth() / 2, BOUNDS.getHeight() / 2);
        final double          RADIUS       = Math.sqrt(BOUNDS.getWidth() * BOUNDS.getWidth() + BOUNDS.getHeight() * BOUNDS.getHeight()) / 2;
        final double          ANGLE_STEP   = 0.1;
        final GradientLookup COLOR_LOOKUP = new GradientLookup(STOPS);
        CTX.translate(CENTER.getX(), CENTER.getY());
        CTX.rotate(-90 + ROTATION_OFFSET);
        CTX.translate(-CENTER.getX(), -CENTER.getY());
        for (int i = 0, size = STOPS.length - 1; i < size; i++) {
            for (double angle = STOPS[i].getOffset() * 360; Double.compare(angle,STOPS[i + 1].getOffset() * 360) <= 0; angle += 0.1) {
                CTX.beginPath();
                CTX.moveTo(CENTER.getX() - RADIUS, CENTER.getY() - RADIUS);
                CTX.setFill(COLOR_LOOKUP.getColorAt(angle / 360));
                if (RADIUS > 0) {
                    CTX.fillArc(CENTER.getX() - RADIUS, CENTER.getY() - RADIUS, 2 * RADIUS, 2 * RADIUS, angle, ANGLE_STEP, ArcType.ROUND);
                } else {
                    CTX.moveTo(CENTER.getX() - RADIUS, CENTER.getY() - RADIUS);
                }
                CTX.fill();
            }
        }
    }

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    public static ImagePattern createCarbonPattern() {
        final double WIDTH        = 12;
        final double HEIGHT       = 12;
        final Canvas CANVAS       = new Canvas(WIDTH, HEIGHT);
        final GraphicsContext CTX = CANVAS.getGraphicsContext2D();


        double offsetY = 0;


        // RULB
        CTX.beginPath();
        CTX.rect(0, 0, WIDTH * 0.5, HEIGHT * 0.5);
        CTX.closePath();


        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.5 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(35, 35, 35)),
                                       new Stop(1, Color.rgb(23, 23, 23))));
        CTX.fill();


        // RULF
        CTX.beginPath();
        CTX.rect(WIDTH * 0.083333, 0, WIDTH * 0.333333, HEIGHT * 0.416666);
        CTX.closePath();
        offsetY = 0;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.416666 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(38, 38, 38)),
                                       new Stop(1, Color.rgb(30, 30, 30))));
        CTX.fill();


        // RLRB
        CTX.beginPath();
        CTX.rect(WIDTH * 0.5, HEIGHT * 0.5, WIDTH * 0.5, HEIGHT * 0.5);
        CTX.closePath();
        offsetY = 0.5;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.5 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(35, 35, 35)),
                                       new Stop(1, Color.rgb(23, 23, 23))));
        CTX.fill();


        // RLRF
        CTX.beginPath();
        CTX.rect(WIDTH * 0.583333, HEIGHT * 0.5, WIDTH * 0.333333, HEIGHT * 0.416666);
        CTX.closePath();
        offsetY = 0.5;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.416666 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(38, 38, 38)),
                                       new Stop(1, Color.rgb(30, 30, 30))));
        CTX.fill();


        // RURB
        CTX.beginPath();
        CTX.rect(WIDTH * 0.5, 0, WIDTH * 0.5, HEIGHT * 0.5);
        CTX.closePath();
        offsetY = 0;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.5 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(48, 48, 48)),
                                       new Stop(1, Color.rgb(40, 40, 40))));
        CTX.fill();


        // RURF
        CTX.beginPath();
        CTX.rect(WIDTH * 0.583333, HEIGHT * 0.083333, WIDTH * 0.333333, HEIGHT * 0.416666);
        CTX.closePath();
        offsetY = 0.083333;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.416666 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(53, 53, 53)),
                                       new Stop(1, Color.rgb(45, 45, 45))));
        CTX.fill();


        // RLLB
        CTX.beginPath();
        CTX.rect(0, HEIGHT * 0.5, WIDTH * 0.5, HEIGHT * 0.5);
        CTX.closePath();
        offsetY = 0.5;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.5 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(48, 48, 48)),
                                       new Stop(1, Color.rgb(40, 40, 40))));
        CTX.fill();


        // RLLF
        CTX.beginPath();
        CTX.rect(WIDTH * 0.083333, HEIGHT * 0.583333, WIDTH * 0.333333, HEIGHT * 0.416666);
        CTX.closePath();
        offsetY = 0.583333;
        CTX.setFill(new LinearGradient(0, offsetY * HEIGHT,
                                       0, 0.416666 * HEIGHT + offsetY * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(53, 53, 53)),
                                       new Stop(1, Color.rgb(45, 45, 45))));
        CTX.fill();


        final Image PATTERN_IMAGE = CANVAS.snapshot(SNAPSHOT_PARAMETER, null);
        final ImagePattern PATTERN = new ImagePattern(PATTERN_IMAGE, 0, 0, WIDTH, HEIGHT, false);


        return PATTERN;

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    public static ImagePattern createPunchedSheetPattern(final Color TEXTURE_COLOR) {
        final double WIDTH = 15;
        final double HEIGHT = 15;
        final Canvas CANVAS = new Canvas(WIDTH, HEIGHT);
        final GraphicsContext CTX = CANVAS.getGraphicsContext2D();


        // BACK
        CTX.beginPath();
        CTX.rect(0, 0, WIDTH, HEIGHT);
        CTX.closePath();
        //CTX.setFill(Color.rgb(29, 33, 35));
        CTX.setFill(TEXTURE_COLOR);
        CTX.fill();


        // ULB
        CTX.beginPath();
        CTX.moveTo(0, HEIGHT * 0.266666);
        CTX.bezierCurveTo(0, HEIGHT * 0.4, WIDTH * 0.066666, HEIGHT * 0.466666, WIDTH * 0.2, HEIGHT * 0.466666);
        CTX.bezierCurveTo(WIDTH * 0.333333, HEIGHT * 0.466666, WIDTH * 0.4, HEIGHT * 0.4, WIDTH * 0.4, HEIGHT * 0.266666);
        CTX.bezierCurveTo(WIDTH * 0.4, HEIGHT * 0.133333, WIDTH * 0.333333, HEIGHT * 0.066666, WIDTH * 0.2, HEIGHT * 0.066666);
        CTX.bezierCurveTo(WIDTH * 0.066666, HEIGHT * 0.066666, 0, HEIGHT * 0.133333, 0, HEIGHT * 0.266666);
        CTX.closePath();
        CTX.setFill(new LinearGradient(0, 0.066666 * HEIGHT,
                                       0, 0.466666 * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(0, 0, 0)),
                                       new Stop(1, Color.rgb(68, 68, 68))));
        CTX.fill();


        // ULF
        CTX.beginPath();
        CTX.moveTo(0, HEIGHT * 0.2);
        CTX.bezierCurveTo(0, HEIGHT * 0.333333, WIDTH * 0.066666, HEIGHT * 0.4, WIDTH * 0.2, HEIGHT * 0.4);
        CTX.bezierCurveTo(WIDTH * 0.333333, HEIGHT * 0.4, WIDTH * 0.4, HEIGHT * 0.333333, WIDTH * 0.4, HEIGHT * 0.2);
        CTX.bezierCurveTo(WIDTH * 0.4, HEIGHT * 0.066666, WIDTH * 0.333333, 0, WIDTH * 0.2, 0);
        CTX.bezierCurveTo(WIDTH * 0.066666, 0, 0, HEIGHT * 0.066666, 0, HEIGHT * 0.2);
        CTX.closePath();
        CTX.setFill(TEXTURE_COLOR.darker().darker());
        CTX.fill();


        // LRB
        CTX.beginPath();
        CTX.moveTo(WIDTH * 0.466666, HEIGHT * 0.733333);
        CTX.bezierCurveTo(WIDTH * 0.466666, HEIGHT * 0.866666, WIDTH * 0.533333, HEIGHT * 0.933333, WIDTH * 0.666666, HEIGHT * 0.933333);
        CTX.bezierCurveTo(WIDTH * 0.8, HEIGHT * 0.933333, WIDTH * 0.866666, HEIGHT * 0.866666, WIDTH * 0.866666, HEIGHT * 0.733333);
        CTX.bezierCurveTo(WIDTH * 0.866666, HEIGHT * 0.6, WIDTH * 0.8, HEIGHT * 0.533333, WIDTH * 0.666666, HEIGHT * 0.533333);
        CTX.bezierCurveTo(WIDTH * 0.533333, HEIGHT * 0.533333, WIDTH * 0.466666, HEIGHT * 0.6, WIDTH * 0.466666, HEIGHT * 0.733333);
        CTX.closePath();
        CTX.setFill(new LinearGradient(0, 0.533333 * HEIGHT,
                                       0, 0.933333 * HEIGHT,
                                       false, CycleMethod.NO_CYCLE,
                                       new Stop(0, Color.rgb(0, 0, 0)),
                                       new Stop(1, Color.rgb(68, 68, 68))));
        CTX.fill();


        // LRF
        CTX.beginPath();
        CTX.moveTo(WIDTH * 0.466666, HEIGHT * 0.666666);
        CTX.bezierCurveTo(WIDTH * 0.466666, HEIGHT * 0.8, WIDTH * 0.533333, HEIGHT * 0.866666, WIDTH * 0.666666, HEIGHT * 0.866666);
        CTX.bezierCurveTo(WIDTH * 0.8, HEIGHT * 0.866666, WIDTH * 0.866666, HEIGHT * 0.8, WIDTH * 0.866666, HEIGHT * 0.666666);
        CTX.bezierCurveTo(WIDTH * 0.866666, HEIGHT * 0.533333, WIDTH * 0.8, HEIGHT * 0.466666, WIDTH * 0.666666, HEIGHT * 0.466666);
        CTX.bezierCurveTo(WIDTH * 0.533333, HEIGHT * 0.466666, WIDTH * 0.466666, HEIGHT * 0.533333, WIDTH * 0.466666, HEIGHT * 0.666666);
        CTX.closePath();
        CTX.setFill(TEXTURE_COLOR.darker().darker());
        CTX.fill();


        final Image PATTERN_IMAGE = CANVAS.snapshot(SNAPSHOT_PARAMETER, null);
        final ImagePattern PATTERN = new ImagePattern(PATTERN_IMAGE, 0, 0, WIDTH, HEIGHT, false);


        return PATTERN;

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     * Draws the content of the canvas and updates the 
     * {@code renderingInfo} attribute with the latest rendering 
     * information.
     */
    public final void draw() {
        GraphicsContext ctx = getGraphicsContext2D();
        ctx.save();
        double width = getWidth();
        double height = getHeight();
        if (width > 0 && height > 0) {
            ctx.clearRect(0, 0, width, height);
            this.info = new ChartRenderingInfo();
            this.chart.draw(this.g2, new Rectangle((int) width, (int) height), 
                    this.anchor, this.info);
        }
        ctx.restore();
        this.anchor = null;
    }

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            colorAdjust.setHue(randomHueAdjust);
            // Draw into a canvas and then apply the effect, because if we snapshotted the image view, we'd end up
            // with the rounded corners which we don't want.
            Image image = new Image(getResource("default-cover-image.png").openStream());
            Canvas canvas = new Canvas(image.getWidth(), image.getHeight());
            GraphicsContext gc = canvas.getGraphicsContext2D();
            gc.drawImage(image, 0, 0);
            gc.applyEffect(colorAdjust);
            WritableImage colouredImage = new WritableImage((int) image.getWidth(), (int) image.getHeight());
            canvas.snapshot(new SnapshotParameters(), colouredImage);
            coverImageView.setImage(colouredImage);
            // Convert to a PNG and store in the project model.
            ImageIO.setUseCache(false);

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