Your numbers aren't quite right. (they're off by a pixel for scale by
2. I did it for 3 and 4 as well and got:
scale, x translate, y translate
2, -7, -13
3, -4.5, -12.5
4, -3.5, -12
The formula is not obvious to me. Maybe some other math wizard will see it.
Here's modified code that makes it easier to play around with using
java MacFontTest scale positiveXOffset positiveYOffset
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class MacFontTest
{
public static void main(String[] p_argv)
{
JFrame frame = new JFrame("test");
frame.getContentPane().setLayout(new FlowLayout());
frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
double scale = Double.valueOf(p_argv[0]).doubleValue();
Font f = new Font("SansSerif", Font.BOLD, 12);
AffineTransform a;
JButton normal = new JButton("Hello, world");
normal.setOpaque(false);
a = AffineTransform.getScaleInstance(1.0, 1.0);
Font f1 = f.deriveFont(a);
normal.setFont(f1);
JButton scaled = new JButton("Hello, world");
scaled.setOpaque(false);
a = AffineTransform.getScaleInstance(scale, scale);
a.translate(-Double.valueOf(p_argv[1]).doubleValue(),-Double.valueOf(p_argv[2]).doubleValue());
// Why??????????
Font f2 = f.deriveFont(a);
scaled.setFont(f2);
JButton larger = new JButton("Hello, world");
larger.setOpaque(false);
Font f3 = new Font("SansSerif",Font.BOLD,(int) (12 * scale));
larger.setFont(f3);
frame.getContentPane().add(normal);
frame.getContentPane().add(scaled);
frame.getContentPane().add(larger);
frame.pack();
frame.setSize((int) (100 * scale),(int) (100 * scale));
frame.show();
}
}
On Sat, 19 Mar 2005 12:07:18 -0800 (PST), Jim Douglas <email@hidden>
wrote:
> You were right, Wilhelm. It appears that the text isn't visible
> because it has been shifted completely outside the bounds of the
> component. Applying an (apparently arbitrary?) translation drags it
> back to where it should have been:
>
> import java.awt.*;
> import java.awt.geom.*;
> import javax.swing.*;
>
> public class MacFontTest
> {
> public static void main(String[] p_argv)
> {
> JFrame frame = new JFrame("test");
> frame.getContentPane().setLayout(new FlowLayout());
> frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
>
> Font f = new Font("SansSerif", Font.BOLD, 12);
> AffineTransform a;
>
> JButton normal = new JButton("Hello, world");
> normal.setOpaque(false);
> a = AffineTransform.getScaleInstance(1.0, 1.0);
> Font f1 = f.deriveFont(a);
> normal.setFont(f1);
>
> JButton scaled = new JButton("Hello, world");
> scaled.setOpaque(false);
> a = AffineTransform.getScaleInstance(2.0, 2.0);
> a.translate(-6.5,-13); // Why??????????
> Font f2 = f.deriveFont(a);
> scaled.setFont(f2);
>
> JButton larger = new JButton("Hello, world");
> larger.setOpaque(false);
> Font f3 = new Font("SansSerif",Font.BOLD,24);
> larger.setFont(f3);
>
> frame.getContentPane().add(normal);
> frame.getContentPane().add(scaled);
> frame.getContentPane().add(larger);
> frame.pack();
> frame.setSize(200,200);
> frame.show();
> }
> }
>
> I can't work out any coherent rules for what translation to apply in
> any situation, so this doesn't seem to be the basis for a workaround.
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