/**
* Copyright (c) 2008-2012 Ardor Labs, Inc.
*
* This file is part of Ardor3D.
*
* Ardor3D is free software: you can redistribute it and/or modify it
* under the terms of its license which may be found in the accompanying
* LICENSE file or at <http://www.ardor3d.com/LICENSE>.
*/
package com.ardor3d.extension.ui;
import java.util.ArrayList;
import java.util.List;
import com.ardor3d.extension.ui.event.ActionEvent;
import com.ardor3d.extension.ui.event.ActionListener;
import com.ardor3d.extension.ui.layout.BorderLayout;
import com.ardor3d.extension.ui.layout.BorderLayoutData;
/**
* NOTE: Experimental still.
*/
public class UIScrollBar extends UIPanel {
private final Orientation orientation;
private final UISlider slider;
private final UIButton btTopLeft;
private final UIButton btBottomRight;
private int sliderLength;
/** List of action listeners notified when this scrollbar is changed. */
private final List<ActionListener> _listeners = new ArrayList<ActionListener>();
public UIScrollBar(final Orientation orientation) {
setLayout(new BorderLayout());
this.orientation = orientation;
slider = new UISlider(orientation);
slider.setLayoutData(BorderLayoutData.CENTER);
btTopLeft = new UIButton(orientation == Orientation.Vertical ? "^" : "<");
btBottomRight = new UIButton(orientation == Orientation.Vertical ? "v" : ">");
add(btTopLeft);
add(btBottomRight);
add(slider);
if (orientation == Orientation.Vertical) {
btTopLeft.setLayoutData(BorderLayoutData.NORTH);
btBottomRight.setLayoutData(BorderLayoutData.SOUTH);
} else {
btTopLeft.setLayoutData(BorderLayoutData.WEST);
btBottomRight.setLayoutData(BorderLayoutData.EAST);
}
applySkin();
updateMinimumSizeFromContents();
compact();
layout();
final ActionListener al = new ActionListener() {
public void actionPerformed(final ActionEvent event) {
int direction;
if (event.getSource() == btTopLeft) {
direction = UIScrollBar.this.orientation == Orientation.Horizontal ? -1 : 1;
} else {
direction = UIScrollBar.this.orientation == Orientation.Horizontal ? 1 : -1;
}
int offset = slider.getValue();
if (direction < 0) {
offset -= 10;
if (offset < 0) {
offset = 0;
}
} else {
offset += 10;
if (offset > slider.getModel().getMaxValue()) {
offset = slider.getModel().getMaxValue();
}
}
slider.setValue(offset);
fireChangeEvent();
}
};
btTopLeft.addActionListener(al);
btBottomRight.addActionListener(al);
slider.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent event) {
fireChangeEvent();
}
});
}
private void fireChangeEvent() {
final ActionEvent event = new ActionEvent(this);
for (final ActionListener l : _listeners) {
l.actionPerformed(event);
}
}
/**
* Add the specified listener to this scrollbar's list of listeners notified when it's changed.
*
* @param listener
*/
public void addActionListener(final ActionListener listener) {
_listeners.add(listener);
}
public Orientation getOrientation() {
return orientation;
}
public int getSliderLength() {
return sliderLength;
}
public int getValue() {
return slider.getValue();
}
public void setValue(final int offset) {
slider.setValue(offset);
layout();
fireComponentDirty();
}
public void setMaxValue(final int maxOffset) {
slider.getModel().setMaxValue(maxOffset);
}
public UISlider getSlider() {
return slider;
}
public UIButton getBtTopLeft() {
return btTopLeft;
}
public UIButton getBtBottomRight() {
return btBottomRight;
}
}