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package gjt;
import java.awt.Event;
import java.awt.Graphics;
/**
* An ImageButtonController that causes its associated
* ImageButton to "stick" when activated. If the ImageButton
* is raised it depresses<b>[1]</b> upon a mouse down and stays
* down upon a subsequent mouse up event. The same "sticky"
* behaviour occurs when a depressed ImageButton encounters a
* mouse down followed by a subsequent mouse up.<p>
*
* Note that false is returned from mouse event handlers;
* therefore mouse events will be propagated to the
* ImageButton's container. While this is not always
* desirable, it was deemed a better default than swallowing
* the event here. Subclasses may, of course, modify this
* behavior.<p>
*
* <b>[1]</b> No psychiatric consultation is necessary.<p>
*
* @version 1.0, Apr 1 1996
* @author David Geary
* @see ImageButton
* @see ImageButtonController
* @see SpringyImageButtonController
*/
public class StickyImageButtonController
extends ImageButtonController {
private boolean buttonUpOnLastMouseDown = true;
public StickyImageButtonController(ImageButton ib) {
super(ib);
}
public boolean mouseDown(Event event, int x, int y) {
ImageButton button = getButton();
if(event.modifiers == 0) {
if(button.isRaised()) button.paintInset();
else button.paintRaised();
buttonUpOnLastMouseDown = getButton().isRaised();
armButton(event);
}
return false;
}
public boolean mouseUp(Event event, int x, int y) {
activateButton(event);
return false;
}
public boolean mouseDrag(Event event, int x, int y) {
ImageButton button = getButton();
if(event.modifiers == 0) {
if(button.isInside(x,y)) {
if(buttonUpOnLastMouseDown) {
if(button.isRaised() == false) {
button.paintRaised();
armButton(event);
}
}
else {
if(button.isRaised()) {
button.paintInset();
armButton(event);
}
}
}
else {
if(buttonUpOnLastMouseDown) {
if(button.isRaised()) {
button.paintInset();
disarmButton(event);
}
}
else {
if(button.isRaised() == false) {
button.paintRaised();
disarmButton(event);
}
}
}
}
return false;
}
}
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