设置JSlider限制

Question

I have a JSlider that goes from min to max values. I want to set a range limit for slider movements.

Ie I want to put slider limits from -90 to 90, but I want to move the slider only between -45 and 60. In this case the slider does not reach limits but it's blocked before reaching it.

How can I obtain this result?

import java.awt.BorderLayout;

import javax.swing.BoundedRangeModel;
import javax.swing.JFrame;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class TickSlidersSnapToTicks {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Tick Slider");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JSlider slider = new JSlider(-90, 90, 0);

    // Major Tick 25 - Minor 5
    jSliderOne.setMinorTickSpacing(5);
    jSliderOne.setMajorTickSpacing(25);
    jSliderOne.setPaintTicks(true);

    // I want to put here slider block limits
    // ...

    frame.add(jSliderOne, BorderLayout.NORTH);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

Answer 1

This solution works (note the trick to let the slider think that the user released the mouse):

public class InnerSlider extends JSlider {

    int innerMin, innerMax;

    public InnerSlider(int min, int max, int innerMin, int innerMax){
        super(min,max);
        this.innerMin = innerMin;
        this.innerMax= innerMax;
        addChangeListener((e) -> {
            if(getValue() < innerMin){
                setValue(innerMin);
                getMouseListeners()[0].mouseReleased(null);
            }else if(getValue() > innerMax){
                setValue(innerMax);
                getMouseListeners()[0].mouseReleased(null);
            }
        });
    }
}

Answer 2

There is quick dirty way to do this,but this violate some design principles like LSP.

    JSlider jSliderOne = new JSlider();

    // Major Tick 25 - Minor 5
    jSliderOne.setMinorTickSpacing(5);
    jSliderOne.setMajorTickSpacing(25);
    jSliderOne.setPaintTicks(true);
    jSliderOne.setModel(new DefaultBoundedRangeModel()
                    {
                      @Override
                      public void setValue(int n)
                      {
                        if (n > 50)
                        {
                          n = 50;
                        }
                        else if (n < -45)
                        {
                          n = -45;
                        }

                        super.setValue(n);
                      }
                    }
);

in this solution, if user tries to drag the thumb system will allow to go beyond the limit, but once user release the mouse it will set to limit.