Hi--I'm continuing on my path to learning how to use Clojure with the
graphics library Piccolo2D (http://
www.piccolo2d.org) by re-implementing some of Piccolo2D's sample
programs. This time, I'm working on the "Building the Interface"
program described at http://www.piccolo2d.org/learn/interface.html.
I've used proxy successfully several times so far, but I'm not sure I
can use it here. The code that I'm trying to translate is as follows:
-----------------------------------
class ToggleShape extends PPath {
private boolean fIsPressed = false;
public ToggleShape() {
setPathToEllipse(0, 0, 100, 80);
addInputEventListener(new PBasicInputEventHandler() {
public void mousePressed(PInputEvent event) {
super.mousePressed(event);
fIsPressed = true;
repaint();
}
public void mouseReleased(PInputEvent event) {
super.mouseReleased(event);
fIsPressed = false;
repaint();
}
});
}
protected void paint(PPaintContext paintContext) {
if (fIsPressed) {
Graphics2D g2 = paintContext.getGraphics();
g2.setPaint(getPaint());
g2.fill(getBoundsReference());
} else {
super.paint(paintContext);
}
}
}
-----------------------------------
Some questions:
1) Because this new class, ToggleShape, has the added state of
fIsPressed, is it possible to use proxy at all, or do I have to use
gen-class? If it's the latter, how do I declare the namespace that
surrounds the gen-class so that this new class is visible to the code
that uses it?
2) If I can use proxy, do I create a constructor for this nameless new
class by redefining PPath (which is, after all, the name of the
constructor for the superclass)?
As always, thanks for your help.
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