/** Creates the JSlider for this object */
private void createSlider() {
int initSliderValue = modelViewTransform.modelToView(initialValue);
if (initSliderValue < SLIDER_MIN || initSliderValue > SLIDER_MAX) {
throw new RuntimeException(
"Illegal slider value, min="
+ SLIDER_MIN
+ ", max="
+ SLIDER_MAX
+ ", value="
+ initSliderValue);
}
final JSlider slider =
new JSlider(SwingConstants.HORIZONTAL, SLIDER_MIN, SLIDER_MAX, initSliderValue);
slider.setPaintTicks(true);
slider.setPaintLabels(true);
slider.addChangeListener(
new ChangeListener() {
public void stateChanged(ChangeEvent e) {
int sliderValue = slider.getValue();
double modelValue = modelViewTransform.viewToModel(sliderValue);
if (!settingSliderValue) {
setValue(modelValue);
}
}
});
int dMinor = SLIDER_MAX / (numMinorTicks - 1);
double modelDX = Math.abs(modelViewTransform.viewToModel(dMinor / 4));
SliderKeyHandler skh = new SliderKeyHandler(modelDX);
slider.addKeyListener(skh);
this.slider = slider;
relabelSlider();
}
public void setModelLabels(Hashtable modelLabels) {
Hashtable viewLabels = new Hashtable();
Set keys = modelLabels.keySet();
Iterator it = keys.iterator();
while (it.hasNext()) {
Object o = (Object) it.next();
Number modelValue = (Number) o;
double v = modelValue.doubleValue();
int viewValue = modelViewTransform.modelToView(v);
viewLabels.put(new Integer(viewValue), modelLabels.get(o));
}
slider.setLabelTable(viewLabels);
}
public void setValue(final double value) {
// bugfix: test for change of state was incomplete: comparing the new 'value' against the old
// 'value' missed valid changes in the transform.
if (slider.getValue() == modelViewTransform.modelToView(value) && this.value == value) {
return;
}
if (value >= min && value <= max) {
String string = textFieldFormat.format(value);
double newValue = value;
try {
newValue = textFieldFormat.parse(string).doubleValue();
// System.out.println( "value="+value+", string = " + string +",
// newValue="+newValue);
} catch (ParseException e) {
e.printStackTrace();
}
// string = string.replace( ',', '.' );
// double newValue = Double.parseDouble( string );
if (slider.getValue() == modelViewTransform.modelToView(value) && this.value == newValue) {
return;
}
this.value = newValue;
textField.setText(string);
int sliderValue = modelViewTransform.modelToView(value);
if (sliderValue != slider.getValue()) {
settingSliderValue = true; // disable recursive calls to this method
slider.setValue(sliderValue); // this recursively changes values
settingSliderValue = false;
slider.revalidate();
slider.repaint();
}
fireStateChanged();
}
}
/**
* Computes the numbers that appear directly below the slider, formats them, and adds them as
* labels to the slider. Also lays out the tick marks
*/
private void relabelSlider() {
int dMajor = SLIDER_MAX / (numMajorTicks - 1);
int dMinor = SLIDER_MAX / (numMinorTicks - 1);
Font labelFont = new PhetFont(0, 10);
Hashtable table = new Hashtable();
for (int value = 0; value <= SLIDER_MAX; value += dMajor) {
double modelValue = modelViewTransform.viewToModel(value);
JLabel label = new JLabel(sliderLabelFormat.format(modelValue));
label.setFont(labelFont);
table.put(new Integer(value), label);
}
slider.setLabelTable(table);
slider.setMajorTickSpacing(dMajor);
slider.setMinorTickSpacing(dMinor);
}
