javafx.scene.canvas.Canvas#getGraphicsContext2D ( )源码实例Demo

下面列出了javafx.scene.canvas.Canvas#getGraphicsContext2D ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： charts 文件： PixelMatrix.java

private void initGraphics() {
    // prefill matrix with pixelOffColor
    for (int y = 0 ; y < rows ; y++) {
        for (int x = 0 ; x < cols ; x++) {
            matrix[x][y] = pixelOffColor;
        }
    }

    if (Double.compare(getPrefWidth(), 0.0) <= 0 || Double.compare(getPrefHeight(), 0.0) <= 0 ||
        Double.compare(getWidth(), 0.0) <= 0 || Double.compare(getHeight(), 0.0) <= 0) {
        if (getPrefWidth() > 0 && getPrefHeight() > 0) {
            setPrefSize(getPrefWidth(), getPrefHeight());
        } else {
            setPrefSize(preferredWidth, preferredHeight);
        }
    }

    canvas = new Canvas(preferredWidth, preferredHeight);
    ctx = canvas.getGraphicsContext2D();

    getChildren().setAll(canvas);
}

源代码2 项目： charts 文件： Grid.java

private void initGraphics() {
    if (Double.compare(getPrefWidth(), 0.0) <= 0 || Double.compare(getPrefHeight(), 0.0) <= 0 || Double.compare(getWidth(), 0.0) <= 0 ||
        Double.compare(getHeight(), 0.0) <= 0) {
        if (getPrefWidth() > 0 && getPrefHeight() > 0) {
            setPrefSize(getPrefWidth(), getPrefHeight());
        } else {
            setPrefSize(PREFERRED_WIDTH, PREFERRED_HEIGHT);
        }
    }

    canvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    ctx    = canvas.getGraphicsContext2D();

    pane   = new Pane(canvas);

    getChildren().setAll(pane);
}

源代码3 项目： OEE-Designer 文件： PixelMatrix.java

private void initGraphics() {
    // prefill matrix with pixelOffColor
    for (int y = 0 ; y < rows ; y++) {
        for (int x = 0 ; x < cols ; x++) {
            matrix[x][y] = pixelOffColor;
        }
    }

    if (Double.compare(getPrefWidth(), 0.0) <= 0 || Double.compare(getPrefHeight(), 0.0) <= 0 ||
        Double.compare(getWidth(), 0.0) <= 0 || Double.compare(getHeight(), 0.0) <= 0) {
        if (getPrefWidth() > 0 && getPrefHeight() > 0) {
            setPrefSize(getPrefWidth(), getPrefHeight());
        } else {
            setPrefSize(preferredWidth, preferredHeight);
        }
    }

    canvas = new Canvas(preferredWidth, preferredHeight);
    ctx = canvas.getGraphicsContext2D();

    getChildren().setAll(canvas);
    canvas.addEventHandler(MouseEvent.MOUSE_PRESSED, clickHandler);
}

源代码4 项目： OEE-Designer 文件： SunburstChart.java

private void initGraphics() {
    if (Double.compare(getPrefWidth(), 0.0) <= 0 || Double.compare(getPrefHeight(), 0.0) <= 0 || Double.compare(getWidth(), 0.0) <= 0 ||
        Double.compare(getHeight(), 0.0) <= 0) {
        if (getPrefWidth() > 0 && getPrefHeight() > 0) {
            setPrefSize(getPrefWidth(), getPrefHeight());
        } else {
            setPrefSize(PREFERRED_WIDTH, PREFERRED_HEIGHT);
        }
    }

    segmentPane = new Pane();

    chartCanvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    chartCanvas.setMouseTransparent(true);

    chartCtx    = chartCanvas.getGraphicsContext2D();

    pane = new Pane(segmentPane, chartCanvas);
    pane.setBackground(new Background(new BackgroundFill(backgroundPaint, CornerRadii.EMPTY, Insets.EMPTY)));
    pane.setBorder(new Border(new BorderStroke(borderPaint, BorderStrokeStyle.SOLID, CornerRadii.EMPTY, new BorderWidths(borderWidth))));

    getChildren().setAll(pane);

    prepareData();
}

源代码5 项目： FXTutorials 文件： DrawingApp.java

private Parent createContent() {
    Pane root = new Pane();
    root.setPrefSize(800, 600);

    Canvas canvas = new Canvas(800, 600);
    g = canvas.getGraphicsContext2D();

    AnimationTimer timer = new AnimationTimer() {
        @Override
        public void handle(long now) {
            t += 0.017;
            draw();
        }
    };
    timer.start();

    root.getChildren().add(canvas);
    return root;
}

源代码6 项目： tilesfx 文件： CycleStepTileSkin.java

private void initGraphics() {
    if (Double.compare(getPrefWidth(), 0.0) <= 0 || Double.compare(getPrefHeight(), 0.0) <= 0 || Double.compare(getWidth(), 0.0) <= 0 ||
        Double.compare(getHeight(), 0.0) <= 0) {
        if (getPrefWidth() > 0 && getPrefHeight() > 0) {
            setPrefSize(getPrefWidth(), getPrefHeight());
        } else {
            setPrefSize(PREFERRED_WIDTH, PREFERRED_HEIGHT);
        }
    }

    canvas = new Canvas();
    ctx    = canvas.getGraphicsContext2D();

    getChildren().setAll(canvas);
}

源代码7 项目： JetUML 文件： CallEdgeViewer.java

@Override
public Canvas createIcon(Edge pEdge)
{
	final float scale = 0.6f;
	final int offset = 15;
	Canvas canvas = new Canvas(BUTTON_SIZE, BUTTON_SIZE);
	GraphicsContext graphics = canvas.getGraphicsContext2D();
	canvas.getGraphicsContext2D().scale(scale, scale);
	Path path = new Path();
	path.getElements().addAll(new MoveTo(1, offset), new LineTo(BUTTON_SIZE*(1/scale)-1, offset));
	ToolGraphics.strokeSharpPath(graphics, path, LineStyle.SOLID);
	ArrowHead.V.view().draw(graphics, new Point(1, offset), new Point((int)(BUTTON_SIZE*(1/scale)-1), offset));
	return canvas;
}

源代码8 项目： logbook-kai 文件： ShipImage.java

/**
 * 補給ゲージ(燃料・弾薬)を取得します
 *
 * @param ship 艦娘
 * @return 補給ゲージ
 */
static Image getSupplyGauge(Ship ship) {
    Canvas canvas = new Canvas(36, 12);
    GraphicsContext gc = canvas.getGraphicsContext2D();

    Optional<ShipMst> mstOpt = Ships.shipMst(ship);
    if (mstOpt.isPresent()) {
        double width = canvas.getWidth();

        ShipMst mst = mstOpt.get();
        double fuelPer = (double) ship.getFuel() / (double) mst.getFuelMax();
        double ammoPer = (double) ship.getBull() / (double) mst.getBullMax();

        gc.setFill(Color.GRAY);
        gc.fillRect(0, 3, width, 2);

        gc.setFill(Color.GRAY);
        gc.fillRect(0, 10, width, 2);

        Color fuelColor = fuelPer >= 0.5D ? Color.GREEN : fuelPer >= 0.4D ? Color.ORANGE : Color.RED;
        Color ammoColor = ammoPer >= 0.5D ? Color.SADDLEBROWN : ammoPer >= 0.4D ? Color.ORANGE : Color.RED;

        gc.setFill(fuelColor);
        gc.fillRect(0, 0, width * fuelPer, 4);

        gc.setFill(ammoColor);
        gc.fillRect(0, 7, width * ammoPer, 4);
    }
    SnapshotParameters sp = new SnapshotParameters();
    sp.setFill(Color.TRANSPARENT);

    return canvas.snapshot(sp, null);
}

源代码9 项目： FxDock 文件： DragAndDropHandler.java

protected static Image createDragImage(FxDockPane client)
{
	SnapshotParameters sp = new SnapshotParameters();
	sp.setFill(Color.TRANSPARENT);
	
	WritableImage im = client.snapshot(sp, null);

	if(client.isPaneMode())
	{
		return im;
	}
	
	// include selected tab
	FxDockTabPane tp = (FxDockTabPane)DockTools.getParent(client);
	Node n = tp.lookup(".tab:selected");
	WritableImage tim = n.snapshot(sp, null);
	
	double dy = tim.getHeight();
	
	// must adjust for the tab
	deltay += dy;
	
	double w = Math.max(im.getWidth(), tim.getWidth());
	double h = im.getHeight() + dy;
	Canvas c = new Canvas(w, h);
	GraphicsContext g = c.getGraphicsContext2D();
	g.drawImage(tim, 0, 0);
	g.drawImage(im, 0, dy);
	return c.snapshot(sp, null);
}

源代码10 项目： java-ml-projects 文件： YOLOApp.java

private Parent buildCenterPane() {
	Canvas canvas = new Canvas(yoloModel.getInputWidth(), yoloModel.getInputHeight());
	Parent spCanvas = ZoomPane.createZoomPane(new Group(canvas));
	ctx = canvas.getGraphicsContext2D();
	ctx.setTextAlign(TextAlignment.CENTER);
	ctx.fillText("Loading the model. This may take a while...", canvas.getWidth() / 2, canvas.getHeight() / 2);
	return spCanvas;
}

源代码11 项目： Medusa 文件： Helper.java

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

    CTX.setFill(new LinearGradient(0, 0, 0, 0.5 * SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(35, 35, 35)),
                                   new Stop(1, Color.rgb(23, 23, 23))));
    CTX.fillRect(0, 0, SIZE * 0.5, SIZE * 0.5);

    CTX.setFill(new LinearGradient(0, 0, 0, 0.416666 * SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(38, 38, 38)),
                                   new Stop(1, Color.rgb(30, 30, 30))));
    CTX.fillRect(SIZE * 0.083333, 0, SIZE * 0.333333, SIZE * 0.416666);

    CTX.setFill(new LinearGradient(0, 0.5 * SIZE, 0, SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(35, 35, 35)),
                                   new Stop(1, Color.rgb(23, 23, 23))));
    CTX.fillRect(SIZE * 0.5, SIZE * 0.5, SIZE * 0.5, SIZE * 0.5);

    CTX.setFill(new LinearGradient(0, 0.5 * SIZE, 0, 0.916666 * SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(38, 38, 38)),
                                   new Stop(1, Color.rgb(30, 30, 30))));
    CTX.fillRect(SIZE * 0.583333, SIZE * 0.5, SIZE * 0.333333, SIZE * 0.416666);

    CTX.setFill(new LinearGradient(0, 0, 0, 0.5 * SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(48, 48, 48)),
                                   new Stop(1, Color.rgb(40, 40, 40))));
    CTX.fillRect(SIZE * 0.5, 0, SIZE * 0.5, SIZE * 0.5);

    CTX.setFill(new LinearGradient(0, 0.083333 * SIZE, 0, 0.5 * SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(53, 53, 53)),
                                   new Stop(1, Color.rgb(45, 45, 45))));
    CTX.fillRect(SIZE * 0.583333, SIZE * 0.083333, SIZE * 0.333333, SIZE * 0.416666);

    CTX.setFill(new LinearGradient(0, 0.5 * SIZE, 0, SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(48, 48, 48)),
                                   new Stop(1, Color.rgb(40, 40, 40))));
    CTX.fillRect(0, SIZE * 0.5, SIZE * 0.5, SIZE * 0.5);

    CTX.setFill(new LinearGradient(0, 0.583333 * SIZE, 0, SIZE,
                                   false, CycleMethod.NO_CYCLE,
                                   new Stop(0, Color.rgb(53, 53, 53)),
                                   new Stop(1, Color.rgb(45, 45, 45))));
    CTX.fillRect(SIZE * 0.083333, SIZE * 0.583333, SIZE * 0.333333, SIZE * 0.416666);

    final Image        PATTERN_IMAGE = CANVAS.snapshot(new SnapshotParameters(), null);
    final ImagePattern PATTERN       = new ImagePattern(PATTERN_IMAGE, 0, 0, SIZE, SIZE, false);

    return PATTERN;
}

源代码12 项目： tilesfx 文件： FlipTileSkin.java

@Override protected void initGraphics() {
    super.initGraphics();

    timeline              = new Timeline();
    characters            = tile.getCharacterList();
    currentSelectionIndex = 0;
    nextSelectionIndex    = 1;

    centerX    = PREFERRED_WIDTH * 0.5;
    centerY    = PREFERRED_HEIGHT * 0.5;

    pane.setBackground(null);
    pane.setBorder(null);

    rotateFlap = new Rotate();
    rotateFlap.setAxis(Rotate.X_AXIS);
    rotateFlap.setAngle(0);

    flapHeight = PREFERRED_HEIGHT * 0.495;

    upperBackground    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    upperBackgroundCtx = upperBackground.getGraphicsContext2D();

    upperBackgroundText    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    upperBackgroundTextCtx = upperBackgroundText.getGraphicsContext2D();
    upperBackgroundTextCtx.setTextBaseline(VPos.CENTER);
    upperBackgroundTextCtx.setTextAlign(TextAlignment.CENTER);

    lowerBackground    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    lowerBackgroundCtx = lowerBackground.getGraphicsContext2D();

    lowerBackgroundText    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    lowerBackgroundTextCtx = lowerBackgroundText.getGraphicsContext2D();
    lowerBackgroundTextCtx.setTextBaseline(VPos.CENTER);
    lowerBackgroundTextCtx.setTextAlign(TextAlignment.CENTER);

    flap = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    flap.getTransforms().add(rotateFlap);
    flapCtx = flap.getGraphicsContext2D();

    flapTextFront = new Canvas();
    flapTextFront.getTransforms().add(rotateFlap);
    flapTextFrontCtx = flapTextFront.getGraphicsContext2D();
    flapTextFrontCtx.setTextBaseline(VPos.CENTER);
    flapTextFrontCtx.setTextAlign(TextAlignment.CENTER);

    flapTextBack  = new Canvas();
    flapTextBack.getTransforms().add(rotateFlap);
    flapTextBack.setOpacity(0);
    flapTextBackCtx = flapTextBack.getGraphicsContext2D();
    flapTextBackCtx.setTextBaseline(VPos.CENTER);
    flapTextBackCtx.setTextAlign(TextAlignment.CENTER);

    pane.getChildren().addAll(upperBackground,
                              lowerBackground,
                              upperBackgroundText,
                              lowerBackgroundText,
                              flap,
                              flapTextFront,
                              flapTextBack);
}

源代码13 项目： Enzo 文件： SimpleGaugeSkin.java

private void initGraphics() {
    Font.loadFont(getClass().getResourceAsStream("/eu/hansolo/enzo/fonts/opensans-semibold.ttf"), (0.06 * PREFERRED_HEIGHT)); // "OpenSans"

    sectionsCanvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    sectionsCtx    = sectionsCanvas.getGraphicsContext2D();

    measuredRangeCanvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    measuredRangeCanvas.setManaged(getSkinnable().isMeasuredRangeVisible());
    measuredRangeCanvas.setVisible(getSkinnable().isMeasuredRangeVisible());
    measuredRangeCtx    = measuredRangeCanvas.getGraphicsContext2D();        
    
    if (getSkinnable().getValue() < getSkinnable().getMinValue()) getSkinnable().setValue(getSkinnable().getMinValue());
    if (getSkinnable().getValue() > getSkinnable().getMaxValue()) getSkinnable().setValue(getSkinnable().getMaxValue());

    needleRotate = new Rotate(180 - getSkinnable().getStartAngle());
    if (getSkinnable().getMinValue() < 0) {
        needleRotate.setAngle(needleRotate.getAngle() + (getSkinnable().getValue() - getSkinnable().getOldValue() - getSkinnable().getMinValue()) * angleStep);
    } else {
        //needleRotate.setAngle(needleRotate.getAngle() + (getSkinnable().getValue() - getSkinnable().getOldValue() + getSkinnable().getMinValue()) * angleStep);
    }

    angleStep = getSkinnable().getAngleRange() / (getSkinnable().getMaxValue() - getSkinnable().getMinValue());
    needleRotate.setAngle(needleRotate.getAngle() + (getSkinnable().getValue() - getSkinnable().getOldValue()) * angleStep);

    needle = new Path();
    needle.setFillRule(FillRule.EVEN_ODD);
    needle.getStyleClass().setAll("needle");
    needle.getTransforms().setAll(needleRotate);       

    value = new Text(String.format(Locale.US, "%." + getSkinnable().getDecimals() + "f", getSkinnable().getMinValue()) + getSkinnable().getUnit());
    value.setMouseTransparent(true);
    value.setTextOrigin(VPos.CENTER);
    value.getStyleClass().setAll("value");

    title = new Text(getSkinnable().getTitle());
    title.setTextOrigin(VPos.CENTER);
    title.getStyleClass().setAll("title");

    // Add all nodes
    pane = new Pane();
    pane.getStyleClass().add("simple-gauge");
    pane.getChildren().setAll(sectionsCanvas,
                              measuredRangeCanvas,
                              needle,
                              value,
                              title);

    getChildren().setAll(pane);
    resize();
}

源代码14 项目： Medusa 文件： ClockSkin.java

@Override protected void initGraphics() {
    // Set initial size
    if (Double.compare(getSkinnable().getPrefWidth(), 0.0) <= 0 || Double.compare(getSkinnable().getPrefHeight(), 0.0) <= 0 ||
        Double.compare(getSkinnable().getWidth(), 0.0) <= 0 || Double.compare(getSkinnable().getHeight(), 0.0) <= 0) {
        if (getSkinnable().getPrefWidth() > 0 && getSkinnable().getPrefHeight() > 0) {
            getSkinnable().setPrefSize(getSkinnable().getPrefWidth(), getSkinnable().getPrefHeight());
        } else {
            getSkinnable().setPrefSize(PREFERRED_WIDTH, PREFERRED_HEIGHT);
        }
    }

    sectionsAndAreasCanvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    sectionsAndAreasCtx    = sectionsAndAreasCanvas.getGraphicsContext2D();

    tickCanvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    tickCtx    = tickCanvas.getGraphicsContext2D();

    alarmPane = new Pane();

    hour = new Rectangle(3, 60);
    hour.setArcHeight(3);
    hour.setArcWidth(3);
    hour.setStroke(getSkinnable().getHourColor());
    hour.getTransforms().setAll(hourRotate);

    minute = new Rectangle(3, 96);
    minute.setArcHeight(3);
    minute.setArcWidth(3);
    minute.setStroke(getSkinnable().getMinuteColor());
    minute.getTransforms().setAll(minuteRotate);

    second = new Rectangle(1, 96);
    second.setArcHeight(1);
    second.setArcWidth(1);
    second.setStroke(getSkinnable().getSecondColor());
    second.getTransforms().setAll(secondRotate);
    second.setVisible(getSkinnable().isSecondsVisible());
    second.setManaged(getSkinnable().isSecondsVisible());

    knob = new Circle(PREFERRED_WIDTH * 0.5, PREFERRED_HEIGHT * 0.5, 4.5);
    knob.setStroke(Color.web("#282a3280"));

    dropShadow = new DropShadow();
    dropShadow.setColor(Color.rgb(0, 0, 0, 0.25));
    dropShadow.setBlurType(BlurType.TWO_PASS_BOX);
    dropShadow.setRadius(0.015 * PREFERRED_WIDTH);
    dropShadow.setOffsetY(0.015 * PREFERRED_WIDTH);

    shadowGroupHour   = new Group(hour);
    shadowGroupMinute = new Group(minute);
    shadowGroupSecond = new Group(second, knob);

    shadowGroupHour.setEffect(getSkinnable().getShadowsEnabled() ? dropShadow : null);
    shadowGroupMinute.setEffect(getSkinnable().getShadowsEnabled() ? dropShadow : null);
    shadowGroupSecond.setEffect(getSkinnable().getShadowsEnabled() ? dropShadow : null);

    title = new Text("");
    title.setVisible(getSkinnable().isTitleVisible());
    title.setManaged(getSkinnable().isTitleVisible());

    dateText = new Text("");
    dateText.setVisible(getSkinnable().isDateVisible());
    dateText.setManaged(getSkinnable().isDateVisible());

    text = new Text("");
    text.setVisible(getSkinnable().isTextVisible());
    text.setManaged(getSkinnable().isTextVisible());

    pane = new Pane(sectionsAndAreasCanvas, tickCanvas, alarmPane, title, dateText, text, shadowGroupHour, shadowGroupMinute, shadowGroupSecond);
    pane.setBorder(new Border(new BorderStroke(getSkinnable().getBorderPaint(), BorderStrokeStyle.SOLID, new CornerRadii(1024), new BorderWidths(getSkinnable().getBorderWidth()))));
    pane.setBackground(new Background(new BackgroundFill(getSkinnable().getBackgroundPaint(), new CornerRadii(1024), Insets.EMPTY)));

    getChildren().setAll(pane);
}

源代码15 项目： OEE-Designer 文件： FlipTileSkin.java

@Override protected void initGraphics() {
    super.initGraphics();

    timeline              = new Timeline();
    characters            = tile.getCharacterList();
    currentSelectionIndex = 0;
    nextSelectionIndex    = 1;

    centerX    = PREFERRED_WIDTH * 0.5;
    centerY    = PREFERRED_HEIGHT * 0.5;

    pane.setBackground(null);
    pane.setBorder(null);

    rotateFlap = new Rotate();
    rotateFlap.setAxis(Rotate.X_AXIS);
    rotateFlap.setAngle(0);

    flapHeight = PREFERRED_HEIGHT * 0.495;

    upperBackground    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    upperBackgroundCtx = upperBackground.getGraphicsContext2D();

    upperBackgroundText    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    upperBackgroundTextCtx = upperBackgroundText.getGraphicsContext2D();
    upperBackgroundTextCtx.setTextBaseline(VPos.CENTER);
    upperBackgroundTextCtx.setTextAlign(TextAlignment.CENTER);

    lowerBackground    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    lowerBackgroundCtx = lowerBackground.getGraphicsContext2D();

    lowerBackgroundText    = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    lowerBackgroundTextCtx = lowerBackgroundText.getGraphicsContext2D();
    lowerBackgroundTextCtx.setTextBaseline(VPos.CENTER);
    lowerBackgroundTextCtx.setTextAlign(TextAlignment.CENTER);

    flap = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT * 0.495);
    flap.getTransforms().add(rotateFlap);
    flapCtx = flap.getGraphicsContext2D();

    flapTextFront = new Canvas();
    flapTextFront.getTransforms().add(rotateFlap);
    flapTextFrontCtx = flapTextFront.getGraphicsContext2D();
    flapTextFrontCtx.setTextBaseline(VPos.CENTER);
    flapTextFrontCtx.setTextAlign(TextAlignment.CENTER);

    flapTextBack  = new Canvas();
    flapTextBack.getTransforms().add(rotateFlap);
    flapTextBack.setOpacity(0);
    flapTextBackCtx = flapTextBack.getGraphicsContext2D();
    flapTextBackCtx.setTextBaseline(VPos.CENTER);
    flapTextBackCtx.setTextAlign(TextAlignment.CENTER);

    pane.getChildren().addAll(upperBackground,
                              lowerBackground,
                              upperBackgroundText,
                              lowerBackgroundText,
                              flap,
                              flapTextFront,
                              flapTextBack);
}

源代码16 项目： JFX8CustomControls 文件： Led.java

private void initGraphics() {
    canvas = new Canvas();
    ctx    = canvas.getGraphicsContext2D();
    getChildren().add(canvas);
}

源代码17 项目： FXyzLib 文件： Patterns.java

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

    double offsetY = 0;
    /// 1= border=yellow=dark========================================================
    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(105, 105, 0)),
            new Stop(1, Color.rgb(98, 98, 0))));
    CTX.fill();
    //  2=body=yellow==============================
    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(138, 138, 0)),
            new Stop(1, Color.rgb(130, 130, 0))));
    CTX.fill();
    //  3=border=yellow=dark=============================
    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(105, 105, 0)),
            new Stop(1, Color.rgb(98, 98, 0))));
    CTX.fill();
    //  4=body=yellow============================================================
    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(138, 138, 0)),
            new Stop(1, Color.rgb(130, 130, 0))));
    CTX.fill();
    //  5= border=gray=dark============================
    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(30, 30, 30))));
    CTX.fill();
    //  6=body=gray=============================
    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();
    //  7= border=gray=dark=============================
    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();
    //  8= body=gray=light==============================
    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(new SnapshotParameters(), null);
    final ImagePattern PATTERN = new ImagePattern(PATTERN_IMAGE, 0, 0, WIDTH, HEIGHT, false);

    return PATTERN;
}

源代码18 项目： Medusa 文件： SimpleSectionSkin.java

private void initGraphics() {
    // Set initial size
    if (Double.compare(gauge.getPrefWidth(), 0.0) <= 0 || Double.compare(gauge.getPrefHeight(), 0.0) <= 0 ||
        Double.compare(gauge.getWidth(), 0.0) <= 0 || Double.compare(gauge.getHeight(), 0.0) <= 0) {
        if (gauge.getPrefWidth() > 0 && gauge.getPrefHeight() > 0) {
            gauge.setPrefSize(gauge.getPrefWidth(), gauge.getPrefHeight());
        } else {
            gauge.setPrefSize(PREFERRED_WIDTH, PREFERRED_HEIGHT);
        }
    }

    sectionCanvas = new Canvas(PREFERRED_WIDTH, PREFERRED_HEIGHT);
    sectionCtx    = sectionCanvas.getGraphicsContext2D();

    barBackground = new Arc(PREFERRED_WIDTH * 0.5, PREFERRED_HEIGHT * 0.5, PREFERRED_WIDTH * 0.4, PREFERRED_HEIGHT * 0.4, gauge.getStartAngle() + 90, -ANGLE_RANGE);
    barBackground.setType(ArcType.OPEN);
    barBackground.setStroke(gauge.getBarBackgroundColor());
    barBackground.setStrokeWidth(PREFERRED_WIDTH * 0.125);
    barBackground.setStrokeLineCap(StrokeLineCap.BUTT);
    barBackground.setFill(null);

    bar = new Arc(PREFERRED_WIDTH * 0.5, PREFERRED_HEIGHT * 0.5, PREFERRED_WIDTH * 0.4, PREFERRED_HEIGHT * 0.4, gauge.getStartAngle() + 90, 0);
    bar.setType(ArcType.OPEN);
    bar.setStroke(gauge.getBarColor());
    bar.setStrokeWidth(PREFERRED_WIDTH * 0.125);
    bar.setStrokeLineCap(StrokeLineCap.BUTT);
    bar.setFill(null);

    titleText = new Text(gauge.getTitle());
    titleText.setFill(gauge.getTitleColor());
    Helper.enableNode(titleText, !gauge.getTitle().isEmpty());

    valueText = new Text();
    valueText.setStroke(null);
    valueText.setFill(gauge.getValueColor());
    Helper.enableNode(valueText, gauge.isValueVisible());

    unitText = new Text();
    unitText.setStroke(null);
    unitText.setFill(gauge.getUnitColor());
    Helper.enableNode(unitText, gauge.isValueVisible() && !gauge.getUnit().isEmpty());

    pane = new Pane(barBackground, sectionCanvas, titleText, valueText, unitText, bar);

    getChildren().setAll(pane);
}

源代码19 项目： marathonv5 文件： FireworksSample.java

public SanFranciscoFireworks() {
    // create a color palette of 180 colors
    colors = new Paint[181];
    colors[0] = new RadialGradient(0, 0, 0.5, 0.5, 0.5, true, CycleMethod.NO_CYCLE, 
                new Stop(0, Color.WHITE),
                new Stop(0.2, Color.hsb(59, 0.38, 1)),
                new Stop(0.6, Color.hsb(59, 0.38, 1,0.1)),
                new Stop(1, Color.hsb(59, 0.38, 1,0))
                );
    for (int h=0;h<360;h+=2) {
        colors[1+(h/2)] = new RadialGradient(0, 0, 0.5, 0.5, 0.5, true, CycleMethod.NO_CYCLE, 
                new Stop(0, Color.WHITE),
                new Stop(0.2, Color.hsb(h, 1, 1)),
                new Stop(0.6, Color.hsb(h, 1, 1,0.1)),
                new Stop(1, Color.hsb(h, 1, 1,0))
                );
    }
    // create canvas
    canvas = new Canvas(1024, 500);

    canvas.setBlendMode(BlendMode.ADD);
    canvas.setEffect(new Reflection(0,0.4,0.15,0));
    background = new ImageView(getClass().getResource("sf.jpg").toExternalForm());
    getChildren().addAll(background,canvas);
    // create animation timer that will be called every frame
    // final AnimationTimer timer = new AnimationTimer() {
    timer = new AnimationTimer() {

        @Override public void handle(long now) {
            GraphicsContext gc = canvas.getGraphicsContext2D();
            // clear area with transparent black
            gc.setFill(Color.rgb(0, 0, 0, 0.2));
            gc.fillRect(0, 0, 1024, 708);
            // draw fireworks
            drawFireworks(gc);
            // countdown to launching the next firework
            if (countDownTillNextFirework == 0) {
                countDownTillNextFirework = 10 + (int)(Math.random()*30);
                fireParticle();
            }
            countDownTillNextFirework --;
        }
    };
}

源代码20 项目： marathonv5 文件： FireworksSample.java

public SanFranciscoFireworks() {
    // create a color palette of 180 colors
    colors = new Paint[181];
    colors[0] = new RadialGradient(0, 0, 0.5, 0.5, 0.5, true, CycleMethod.NO_CYCLE, 
                new Stop(0, Color.WHITE),
                new Stop(0.2, Color.hsb(59, 0.38, 1)),
                new Stop(0.6, Color.hsb(59, 0.38, 1,0.1)),
                new Stop(1, Color.hsb(59, 0.38, 1,0))
                );
    for (int h=0;h<360;h+=2) {
        colors[1+(h/2)] = new RadialGradient(0, 0, 0.5, 0.5, 0.5, true, CycleMethod.NO_CYCLE, 
                new Stop(0, Color.WHITE),
                new Stop(0.2, Color.hsb(h, 1, 1)),
                new Stop(0.6, Color.hsb(h, 1, 1,0.1)),
                new Stop(1, Color.hsb(h, 1, 1,0))
                );
    }
    // create canvas
    canvas = new Canvas(1024, 500);

    canvas.setBlendMode(BlendMode.ADD);
    canvas.setEffect(new Reflection(0,0.4,0.15,0));
    background = new ImageView(getClass().getResource("sf.jpg").toExternalForm());
    getChildren().addAll(background,canvas);
    // create animation timer that will be called every frame
    // final AnimationTimer timer = new AnimationTimer() {
    timer = new AnimationTimer() {

        @Override public void handle(long now) {
            GraphicsContext gc = canvas.getGraphicsContext2D();
            // clear area with transparent black
            gc.setFill(Color.rgb(0, 0, 0, 0.2));
            gc.fillRect(0, 0, 1024, 708);
            // draw fireworks
            drawFireworks(gc);
            // countdown to launching the next firework
            if (countDownTillNextFirework == 0) {
                countDownTillNextFirework = 10 + (int)(Math.random()*30);
                fireParticle();
            }
            countDownTillNextFirework --;
        }
    };
}

方法所在类

javafx.scene.canvas.Canvas