Question

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?

Answer 1

You have 3 option for this

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

2) Create an icon dynamically

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) 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);
}