本文介绍了Java的涂料成份为位图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要绘制组件的位图的内容和它的所有子组件。
下面code完美的作品,如果我想绘制整个组件:
I need to draw the content of a component and all its subcomponents in a bitmap.The following code works perfectly if i want to draw the entire component :
public void printComponent(Component c, String format, String filename) throws IOException {
// Create a renderable image with the same width and height as the component
BufferedImage image = new BufferedImage(c.getWidth(), c.getHeight(), BufferedImage.TYPE_INT_ARGB);
// Render the component and all its sub components
c.paintAll(image.getGraphics());
// Render the component and ignoring its sub components
c.paint(image.getGraphics());
// Save the image out to file
ImageIO.write(image, format, new File(filename));
}
但我没有找到图纸仅此组件的区的一种方式。
任何想法?
but i didn't find a way for drawing only a region of this component.Any idea ?
推荐答案
您需要翻译是这样的:
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics g = image.getGraphics();
g.translate(-100, -100);
c.paintComponent(g);
g.dispose();
与输出完整的示例:
Full example with output:
public static void main(String args[]) throws Exception {
JFrame frame = new JFrame("Test");
frame.add(new JTable(new DefaultTableModel() {
@Override
public int getColumnCount() {
return 10;
}
@Override
public int getRowCount() {
return 10;
}
@Override
public Object getValueAt(int row, int column) {
return row + " " + column;
}
}));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(400, 300);
frame.setVisible(true);
BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
Graphics g = image.getGraphics();
g.translate(-100, -100);
frame.paintComponents(g);
g.dispose();
ImageIO.write(image, "png", new File("frame.png"));
}
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