JavaFX:将窗格视图保存到图像 [英] JavaFX: Save view of pane to image

问题描述

假设我在 StackPane 上有N层，我在 StackPane 上进行了混合，绘图，图像，矩形等.我将如何保存结果?即在 StackPane 上我的屏幕上显示的内容.

Suppose I have N layers on a StackPane, I do blendings, drawings, images, rectangles etc on the StackPane. How would I go about saving the result? Ie what shows on my screen on the StackPane.

通常，假设我有任何可绘制的JavaFX元素，我将如何将该特定元素绘制到图像文件.

In general, suppose I have any drawable JavaFX element, how would I go about drawing that specific element to an imagefile.

我知道swing会提供其 getGraphics()以便直接绘制到图像的像素缓冲区，但是我找不到与 Node 或 Pane .

I know swing would offer its getGraphics() for drawing directly to the pixel buffer of an image but I cannot find anything similar for Node or Pane.

推荐答案

您可以使用

You can take a snapshot of the Node and save that to file

覆盖以下内容:使用JavaFX拍摄快照！

我倾向于使用类似以下的内容:

I tend to use something like the below:

public void captureAndSaveDisplay(){
    FileChooser fileChooser = new FileChooser();

    //Set extension filter
    fileChooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("png files (*.png)", "*.png"));

    //Prompt user to select a file
    File file = fileChooser.showSaveDialog(null);

    if(file != null){
        try {
            //Pad the capture area
            WritableImage writableImage = new WritableImage((int)getWidth() + 20,
                    (int)getHeight() + 20);
            snapshot(null, writableImage);
            RenderedImage renderedImage = SwingFXUtils.fromFXImage(writableImage, null);
            //Write the snapshot to the chosen file
            ImageIO.write(renderedImage, "png", file);
        } catch (IOException ex) { ex.printStackTrace(); }
    }
}

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