javafx.scene.image.WritableImage#getHeight ( )源码实例Demo

private static void renderImage(WritableImage img, double gridSize, double hueFactor, double hueOffset) {
    PixelWriter pw = img.getPixelWriter();
    double w = img.getWidth();
    double h = img.getHeight();
    double xRatio = 0.0;
    double yRatio = 0.0;
    double hue = 0.0;

    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            xRatio = x/w;
            yRatio = y/h;
            hue = Math.sin(yRatio*(gridSize*Math.PI))*Math.sin(xRatio*(gridSize*Math.PI))*Math.tan(hueFactor/20.0)*360.0 + hueOffset;
            Color c = Color.hsb(hue, 1.0, 1.0);
            pw.setColor(x, y, c);
        }
    }
}
 

private static void renderImage(WritableImage img, double gridSize, double hueFactor, double hueOffset) {
    PixelWriter pw = img.getPixelWriter();
    double w = img.getWidth();
    double h = img.getHeight();
    double xRatio = 0.0;
    double yRatio = 0.0;
    double hue = 0.0;

    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            xRatio = x/w;
            yRatio = y/h;
            hue = Math.sin(yRatio*(gridSize*Math.PI))*Math.sin(xRatio*(gridSize*Math.PI))*Math.tan(hueFactor/20.0)*360.0 + hueOffset;
            Color c = Color.hsb(hue, 1.0, 1.0);
            pw.setColor(x, y, c);
        }
    }
}
 

private void print(final Node node)
{
    try
    {
        // Select printer
        final PrinterJob job = Objects.requireNonNull(PrinterJob.createPrinterJob(), "Cannot create printer job");
        final Scene scene = Objects.requireNonNull(node.getScene(), "Missing Scene");

        if (! job.showPrintDialog(scene.getWindow()))
            return;

        // Get Screenshot
        final WritableImage screenshot = node.snapshot(null, null);

        // Scale image to full page
        final Printer printer = job.getPrinter();
        final Paper paper = job.getJobSettings().getPageLayout().getPaper();
        final PageLayout pageLayout = printer.createPageLayout(paper,
                                                               PageOrientation.LANDSCAPE,
                                                               Printer.MarginType.DEFAULT);
        final double scaleX = pageLayout.getPrintableWidth() / screenshot.getWidth();
        final double scaleY = pageLayout.getPrintableHeight() / screenshot.getHeight();
        final double scale = Math.min(scaleX, scaleY);
        final ImageView print_node = new ImageView(screenshot);
        print_node.getTransforms().add(new Scale(scale, scale));

        // Print off the UI thread
        JobManager.schedule(Messages.Print, monitor ->
        {
            if (job.printPage(print_node))
                job.endJob();
        });
    }
    catch (Exception ex)
    {
        ExceptionDetailsErrorDialog.openError(node, Messages.Print, Messages.PrintErr, ex);
    }
}
 

/**
 * Get an image filled with the specified colour.
 * <p/>
 * @param color the colour of the image.
 * @return the image.
 */
public static Image getImageFromColour(final Color color) {
	WritableImage image = new WritableImage(2, 2);
	PixelWriter writer = image.getPixelWriter();
	for (int i = 0; i < image.getWidth(); i++) {
		for (int j = 0; j < image.getHeight(); j++) {
			writer.setColor(i, j, color);
		}
	}
	return image;
}
 

public static Image createImage(int width, int height, Color color) {
    WritableImage newImage = new WritableImage(width, height);
    PixelWriter pixelWriter = newImage.getPixelWriter();
    for (int y = 0; y < newImage.getHeight(); y++) {
        for (int x = 0; x < newImage.getWidth(); x++) {
            pixelWriter.setColor(x, y, color);
        }
    }
    return newImage;
}
 

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);
}