将带有自定义顶点组件的JGraphX图导出到图像

Question

我有一个图表会覆盖createComponents中的mxGraphComponent，以便将每个顶点渲染为JTable。虽然我预计mxCellRenderer.create*Document无法处理它，但我希望用

保存到图像

BufferedImage image = mxCellRenderer.createBufferedImage(graphComponent.getGraph(), null, 1.0, null, graphComponent.isAntiAlias(), null);
ImageIO.write(image, "PNG", new File("C:\\Temp\\graph.png"));

会（当然，现在我看着它，它显然不能：它只获得mxGraph作为输入，而不是mxGraphComponent！）。有没有办法将图形保存为包含自定义渲染器的图像？

Answer 1

这适用于我的用例

JViewport viewport = graphComponent.getViewport();
Color savedBackground = viewport.getBackground();
viewport.setBackground(new Color(0, 0, 0, 0));
try {
    Dimension size = viewport.getPreferredSize();
    BufferedImage image = new BufferedImage(size.width, size.height, BufferedImage.TYPE_INT_ARGB);
    Graphics2D g = image.createGraphics();
    viewport.printAll(g);
    g.dispose();
    try {
        ImageIO.write(image, "png", target.getFile());
    } catch (IOException e1) {
        NotificationsUtil.showError("Failed to save image", e1);
    }
} finally {
    viewport.setBackground(savedBackground);
}