如何在Java中制作圆形图像标签? [英] How to make Circle image Label in Java?
问题描述
如何在Java中制作圆形图像标签?
How to make Circle image Label in Java?
我想制作圆形图像标签但是我不能这样做..嘿伙计们帮助我..TT
I wanna make circle image Label But I can't do this.. Hey guys Help me..T.T
我尝试使用圆形面板添加图像图标,但这不起作用。
I tried make circle panel for add image icon but that didn't work.
请帮助我.. 。
推荐答案
我认为你应该改变你的方向,而不是试图修改组件的输出,而是修改输入...
I think you should change your tack, instead of trying to modify the output of a component, instead, modify the input...
所有这一切,都是将圆形(基于alpha的)蒙版应用于另一个图像
So all this does, is apply a circular (alpha based) mask to another image
BufferedImage master = ImageIO.read(new File("/Volumes/Disk02/Dropbox/MegaTokyo/thumnails/megatokyo_omnibus_1_3_cover_by_fredrin-d4oupef.jpg"));
int diameter = Math.min(master.getWidth(), master.getHeight());
BufferedImage mask = new BufferedImage(master.getWidth(), master.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics2D g2d = mask.createGraphics();
applyQualityRenderingHints(g2d);
g2d.fillOval(0, 0, diameter - 1, diameter - 1);
g2d.dispose();
BufferedImage masked = new BufferedImage(diameter, diameter, BufferedImage.TYPE_INT_ARGB);
g2d = masked.createGraphics();
applyQualityRenderingHints(g2d);
int x = (diameter - master.getWidth()) / 2;
int y = (diameter - master.getHeight()) / 2;
g2d.drawImage(master, x, y, null);
g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.DST_IN));
g2d.drawImage(mask, 0, 0, null);
g2d.dispose();
JOptionPane.showMessageDialog(null, new JLabel(new ImageIcon(masked)));
这样做的好处是可以获得软剪辑( setClip
不提供)以及不弄乱组件的现有剪裁形状
The benefit of this is you can get soft clipping (which setClip
doesn't provide) as well as not messing with the existing clipping shape of a component
和 applyQualityRenderingHints
...
public static void applyQualityRenderingHints(Graphics2D g2d) {
g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
}
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