I am trying to use a component that has a bar and pointer (looks like JSlider) but that is not editable (using Component.setEnabled(false) on JSlider has undesirable effects such as the object greying out).
Is anyone aware of such a component? And if not, what is the procedure for customizing a JSlider so that it behaves this way.
Thanks.
I have since moved on to other things in my program, but now I am back trying to figure out how to customize a JSlider. I have tried something simple, just trying to mimick JSlider.
import java.io.*;import javax.swing.*;
import javax.swing.JSlider;
import java.util.*;
public class BreakEvenSlider extends JSlider
{
int value;
int maximum;
int minimum;
public BreakEvenSlider(int min, int max, int val)
{
minimum = min;
maximum = max;
value = val;
setValue(val);
setMaximum(maximum);
setMinimum(minimum);
}
public int getValue()
{
//System.out.println(value);
return value();
}
}
It seems though, that by setting it up:
private BreakEvenSlider breakEven = new BreakEvenSlider(-100,100,13);when I try breakEven.getValue() it is returning 50, and the min and max is set to 0 and 100, respectively. This is what the default constructor does.
I am sure there is something fundamental that I just do not understand. Can someone help me out?
Also, how does one "get into the slider's UI and remove the listeners from the knob and track"? I have tried to find tutorials or code on the subject and I have come up empty.
Thanks
Jeremy
javaBeeNewba at 2007-7-10 14:18:51 >
BreakEvenSlider works OK for me, 1.5.0_05.
displays -100 to 100, knob at 13, prints getValue() as 13
for the 'no user movement' bit, see if this does what you want
import java.awt.*;import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.basic.BasicSliderUI;
class Testing
{
public void buildGUI()
{
JSlider slider = new JSlider(0,100,50);
slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(5);
slider.setPaintTicks(true);
slider.setPaintLabels(true);
slider.setUI(new NoListenerUI(slider));
JFrame f = new JFrame();
f.getContentPane().add(slider);
f.pack();
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
class NoListenerUI extends BasicSliderUI
{
public NoListenerUI(JSlider js){super(js);}
protected void installListeners(JSlider slider){}
protected BasicSliderUI.ScrollListener createScrollListener(JSlider slider)
{
class MyScrollListener extends BasicSliderUI.ScrollListener{}
return new MyScrollListener();
}
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new Testing().buildGUI();
}
});
}
}
Michael_Dunna at 2007-7-10 14:18:51 >
This seems to do the trick. However, there are some other things I want to implement with this JSlider.
For instance, I want to paint from the minimum value to the pointer one color and from the pointer to the rest of the slider a seperate color.
Is there a tutorial I can work through that will show me how to use the ComponentUI class?
I mean, I'd think adding this to the code you gave me would at least paint the slider black:
//JSlider j is initialized in constructor
public void paintTrack(Graphics g)
{
//Graphics2D g2d = (Graphics2D)g;
g.setColor(Color.BLACK);
g.draw3DRect(j.getX(),j.getY(),j.getWidth(),j.getHeight(),true);
g.fill3DRect(j.getX(),j.getY(),j.getWidth(),j.getHeight(),true);
}
I am clearly wrong.
Thanks
javaBeeNewba at 2007-7-10 14:18:51 >