JSpinner

> I'm also working with Linux and Java 5.0, but the

> background is always white. I tried different L&F,

> but same thing.

Here's the test program I have used:

import javax.swing.*;

import java.awt.*;

import static java.awt.BorderLayout.*;

public class SwingTester{

JFrame frame;

Container con;

public SwingTester(Component c1, Object constraints1,

Component c2, Object constraints2,

Component c3, Object constraints3){

frame = new JFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

con = frame.getContentPane();

con.add(c1, constraints1);

if (c2 != null){

con.add(c2, constraints2);

}

if (c3 != null){

con.add(c3, constraints3);

}

frame.setSize(500, 500);

frame.setVisible(true);

}

public SwingTester(Component c1, Object constraints1,

Component c2, Object constraints2){

this(c1, constraints1, c2, constraints2, null, null);

}

public SwingTester(Component c1, Object constraints1){

this(c1, constraints1, null, null, null, null);

}

public static void main(String[] args){

SpinnerNumberModel snm = new SpinnerNumberModel(100, 0, 1000, 1);

JSpinner js = new JSpinner(snm);

((JSpinner.NumberEditor)js.getEditor()).getTextField().setOpaque(false);

JTextField jtf = new JTextField("Akaraka Sanbara");

jtf.setOpaque(false);

new SwingTester(js, NORTH, jtf, SOUTH);

}

}

hiwaa at 2007-7-16 1:50:12 >

> Thanks hiwa,

>

> I have added the following line to your code:

> > con.setBackground(new Color(150,150,255));

>

>

> If you run the code now you will see that the text

> field is transparent, but the Spinner component is

> gray. You actually have the same issue.

>

> Maybe it is a bug in the JSpinner component?!

I remember I have seen the source code of JSpinner and its UI classes a few years ago.

Basically, a JSpinner is a composite component and its editor is a JFormattedTextField on a

JPanel. That is, background of the opaque==false textfield is the JPanel's background, not

the content pane of the JFrame. So, it is not a bug.

The whole JSpinner is a more complex composite component. In order to see the content

pane BG color through the spinner textfield, you should do:

((JSpinner.NumberEditor)js.getEditor()).getTextField().setOpaque(false);

((JComponent)((JSpinner.NumberEditor)js.getEditor()).getTextField().getParent()).setOpaque(false);

((JComponent)((JSpinner.NumberEditor)js.getEditor()).getTextField().getParent().getParent()).setOpaque(false);

hiwaa at 2007-7-16 1:50:12 >