Re: [sc-users] drawOnRefresh?

[Fredrik Olofsson <f@xxxxxxxxxxxxxxxxxxx>]

hi Thor,
i do it with some sort of flag inside the drawfunc.  say it's flagged  
for clear, i then draw a rectangle filling the screen with or without  
alpha.  works fine but maybe there are other ways too.

(
var func, views, counter= 0;

func = {
	if(counter>0, {
		//clear+fadeout - or in your case just don't draw anything
		Pen.fillColor_(Color.grey(1, 0.07));
		Pen.fillRect(Rect(0, 0, w.bounds.width, w.bounds.height));
	}, {
		//draw only when counter= 0
		Pen.use{
			10.do{
				Color.red(rrand(0.0, 1), rrand(0.0, 0.5)).set;
				Pen.addArc((400.exprand(2))@(100.rand), rrand(10, 100), 2pi.rand,  
pi);
				Pen.perform([\stroke, \fill].choose);
			}
		}
	})
};

w = SCWindow.new("DrawFunc Examples").front;
w.view.background_(Color.white);
views = {|i|
	v = SCUserView(w, Rect(20+(i*120), 100, 100, 100)).relativeOrigin_ 
(true);
	v.drawFunc = func;
	v.clearOnRefresh_(false)
} ! 3;
Routine({
	inf.do{
		w.refresh;
		0.1.wait;
		counter= counter-1%20;
	}
}).play(AppClock);
)




Am 17.12.2007 um 17:57 schrieb thor:

> Hi
>
> Is it possible to add .drawOnRefresh_ to SCUserView?
>
> I'd like to draw once and then disable SCUserView's draw functionality
> until I tell it to draw again. (other views are being updated which  
> forces
> SCUserView to draw repeatedly).
>
> The following code from the example works, but it's kind of ugly to  
> have to
> repeatedly set the drawFunc to nil and then back to the intended  
> drawFunc
> when needed.
>
> And I'm not sure if clearOnRefresh saves any CPU...
>
> t
>
> prevent redrawing:
>
> (
> var func, views;
>
> func = {|me|
> 	Pen.use{
> 		10.do{
> 			Color.red(rrand(0.0, 1), rrand(0.0, 0.5)).set;
> 			Pen.addArc((400.exprand(2))@(100.rand), rrand(10, 100),  
> 2pi.rand, pi);
> 			Pen.perform([\stroke, \fill].choose);
> 		}
> 	}
> };
>
> w = SCWindow.new("DrawFunc Examples").front;
> w.view.background_(Color.white);
> views = {|i|
> 	v = SCUserView(w, Rect(20+(i*120), 100, 100, 100)).relativeOrigin_ 
> (true);
> 	v.drawFunc = func;
> } ! 3;
> w.refresh;
> {views.do{|v| v.clearOnRefresh_(false);v.drawFunc = nil}}.defer(0.4);
> )


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