Re: jslider mouse click

From:

"John B. Matthews" <john.b..matthews@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:50:39 GMT

Message-ID:

<nospam-CBDE87.07233811112008@news.motzarella.org>

To: comp.lang.java.gui
In article
<cc1aaac0-2db5-469b-8f28-207d065d9ac1@g17g2000prg.googlegroups.com>,
caultonpos <caultonpos@gmail.com> wrote:

On Nov 10, 7:27apm, "John B. Matthews" <nos...@nospam.invalid> wrote:

In article
<d0a83de9-fe90-4ccc-a9b4-9ee1ca4ea...@d42g2000prb.googlegroups.com>,

acaultonpos <caulton...@gmail.com> wrote:

[...]

Java 1.6 Is there any way I can setup a mouse listener to set the
value of the slide to be the nearest tick to where the user clicked -
instead of just incrementing one unit up or down?

[...]

See setSnapToTicks():

<http://java.sun.com/javase/6/docs/api/javax/swing/JSlider.html>

[Please trim signatures.]

I have snaptoticks on - it still only moves one unit at a time
regardless of where you click on the slider

The field is named snapToTicks; it is controlled by the setSnapToTicks()
method; the listener is irrelevant. If you were to supply an sscce
<http://pscode.org/sscce.html>, it might be possible to identify your
problem. What is the behavior of the following program on your
implementation?

<sscce>
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;

/**
* JSliderTest1
* @author John B. Matthews
*/
public class JSliderTest1 extends JPanel {

    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
            JFrame frame = new JFrame("Sliders!");
            frame.add(new JSliderTest1());
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setSize(550, 400);
            frame.setVisible(true);
            }
        });
    }

    public JSliderTest1() {
        this.setLayout(new BorderLayout());
        this.add(genVerticalSliderPanel(), BorderLayout.WEST);
        this.add(genHorizontalSliderPanel(1), BorderLayout.NORTH);
        this.add(genHorizontalSliderPanel(3), BorderLayout.CENTER);
        this.add(genHorizontalSliderPanel(1), BorderLayout.SOUTH);
        this.add(genVerticalSliderPanel(), BorderLayout.EAST);
    }

    private JPanel genHorizontalSliderPanel(int count) {
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
        for (int i = 0; i < count; i++) {
            JSlider slider = new JSlider(JSlider.HORIZONTAL);
            decorate(slider, 400, Short.MAX_VALUE);
            panel.add(Box.createVerticalGlue());
            panel.add(slider);
        }
        panel.add(Box.createVerticalGlue());
        return panel;
    }

    private JPanel genVerticalSliderPanel() {
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
        JSlider slider = new JSlider(JSlider.VERTICAL);
        decorate(slider, Short.MAX_VALUE, 300);
        panel.add(slider);
        return panel;
    }

    private void decorate(JSlider slider, int w, int h) {
        slider.setMaximumSize(new Dimension(w, h));
        slider.setSnapToTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setPaintTicks(true);
        slider.setPaintLabels(true);
    }
}
</sscce>

--
John B. Matthews
trashgod at gmail dot com
http://home.roadrunner.com/~jbmatthews/

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