Java动态调整图像大小以适合gridlayout中的网格 [英] java resize image dynamically to fit grids in gridlayout

问题描述

我想使用JButton的自定义子类制作国际象棋类型的棋盘.我的问题是我的国际象棋图像太小了.有没有一种方法可以使图像缩放到恰好在我的网格布局中每个网格的大小?如果我调整Jframe的大小，那么网格也会改变大小.有没有一种方法可以使图像在调整整个帧的大小时动态调整大小?

I want to make a chess type board using a custom subclass of JButton. My problem is that my images of the chess pieces are a bit too small. Is there a way I can get the image to scale to exactly the size of each grid in my gridlayout? If I resize the Jframe, the grids will change size as well. Is there a way to get the image to resize dynamically upon resizing of the whole frame?

推荐答案

您对此有3个选择

1)使用Gimp，Photoshop等调整图像本身的大小.

1) Resize the images themselves using Gimp, Photoshop, etc.

2)动态创建图标

Image i = icon.getImage();
if(i != null){
   int width = (int)(size * fraction);
   int height =(int)(size*icon.getIconHeight()/icon.getIconWidth()*fraction);
   miniature = new ImageIcon(i.getScaledInstance(width, height, Image.SCALE_SMOOTH));
}

3)在框架的油漆上可以使用刻度

3) on the paint of your frame you can use scale

private void scaledDrawing(Graphics g, float scale){
   Graphics2D g2 = (Graphics2D) g;
   AffineTransform at = new AffineTransform();
   AffineTransform save = g2.getTransform();
   at.setToIdentity();
   at.scale(goa.getScale().x, goa.getScale().y);
   g2.transform(at);
   image.paintIcon(c, g2);
   g2.setTransform(save);
}

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