UIManager.put("CheckBox.icon... Usage?

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Jim Crowell - 04 Nov 2003 17:42 GMT

Hello,

I am trying to control some Look & Feel Color parameters for the JCheckBox
class. I am using Java 1.3.1

I have written a Class based on some code I found on the Internet designed
to accomplish this task. Among other things this class has a 'paintIcon'
method where my LAF adjustement are made.

I have verified with 'System.out.println' Statement that the following line
is reached during my initialization phase:

UIManager.put("CheckBox.icon", new JTKCheckBoxIcon());
where 'JTKCheckBoxIcon' is the name of my Class to adjust the LAF
parameters.

I also have placed a 'System.out.println' Statement as the first statement
in the 'JTKCheckBoxIcon.paintIcon' class.

I never see the 'println' from my 'paintIcon' method and the test JComboBox
LAF is not modified.

I found several cases, in this forum and others, where just modifying the
UIManager "CheckBox.icon" key is suggested but now I wonder if I need to
subclass JComboBox somehow to make this work?

Can anyone see where I have gone wrong here?

Can anyone point me to some code that I can use to print out the UIManager
parameters at the time I instance the test JComboBox object? I found one
reference in this forum but the link has gone south.

Thanks,
Jim...

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Simon Righarts - 05 Nov 2003 10:12 GMT

> Hello,
>
> I am trying to control some Look & Feel Color parameters for the JCheckBox
> class. I am using Java 1.3.1

<snippage>

Here's how I did it (I had to override the default, because I had
dark-background JPanels, and the default 'tick' doesn't show up on those):

in init(),main() or wherever you initialise the GUI:

....
UIManager.put("CheckBox.icon", new MyCheckIcon()); //black tick on dark
background = bad
....

and the MyCheckIcon class is:

import javax.swing.plaf.metal.*;
import javax.swing.*;
import java.awt.*;

public class MyCheckIcon extends MetalCheckBoxIcon{

protected void drawCheck(Component c, Graphics g, int x, int y) {
Color old = g.getColor();
g.setColor(DomCalculator.tickColor); // see note
int controlSize = getControlSize();
g.fillRect( x+3, y+5, 2, controlSize-8 );
g.drawLine( x+(controlSize-4), y+3, x+5, y+(controlSize-6) );
g.drawLine( x+(controlSize-4), y+4, x+5, y+(controlSize-5) );
g.setColor(old);
}
}

/* DomCalculator.tickColor for my project was a public static data field ...
replace with whatever colour tick you want.
Also, if you're using a different LAF, replace the metal import/name by the
proper ones for your LAF */

Reply to this Message

Jim Crowell - 05 Nov 2003 14:12 GMT

Simon,

> Here's how I did it (I had to override the default, because I had
> dark-background JPanels, and the default 'tick' doesn't show up on those):
[quoted text clipped - 5 lines]
> background = bad
> ....

My problem is that somehow my UIManager.put("CheckBox.icon", ... operation
is not being registered OR the registration is being corrupted somewhere.
When I received this response I added a System.out.println statement to my
'drawCheck' Method also but I never get there.

Look like from your response and other examples I found on the Intrernet
that I am doing what I should be doing but something in my code is messing
up the UIManager processing.

Thanks,
Jim

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UIManager.put("CheckBox.icon... Usage?

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