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BackPaint question [message #615]

Fri, 20 January 2006 17:45

hojtsy
Messages: 241
Registered: January 2006
Location: Budapest, Hungary

Experienced Member

While analyzing the AnimatedHello example I found this method:

HelloWorld::HelloWorld()
{
  SetTimeCallback(-40, THISBACK(Animate));
  BackPaint();
  Zoomable().Sizeable();
  SetRect(0, 0, 260, 80);
}

Why is the BackPaint() there? It is supposed to mean that the framework should clear the full widget to the backround color before calling Paint, right? There seems to be no need for that, since the HelloWorld::Paint starts with painting the whole area with the white color.

A related question: Would it be logical for flickeing to occur in the AnimatedHello application, especially since the background seems to be painted two times with different color? I don't see any flicker, but how is it avoided?

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[Message index]

		BackPaint question By: hojtsy on Fri, 20 January 2006 17:45
		Re: BackPaint question By: unodgs on Fri, 20 January 2006 22:07
		Re: BackPaint question By: hojtsy on Sat, 21 January 2006 00:27
		Re: BackPaint question By: mirek on Sun, 22 January 2006 21:18

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