Flicker Free example with dialog

One can find several examples for flicker free drawing in MFC. (see for example Flicker Free Drawing In MFC)

Here is an example done by myself. I used the CMemDC Class posted in Enhanced CMemDC.

  FlickerFreeDemoBackground.zip (27.7 KiB)

What is the magic? We need to make sure, that the background of our window is not painted when OnPaint is called. For that we need to include the message ON_WM_ERASEBKGND() with the simple content in its function

BOOL CFlickerFreeDemoDlg::OnEraseBkgnd(CDC* pDC)
{
	return FALSE;
}

BOOL CFlickerFreeDemoDlg::OnInitDialog()
{
	SetTimer(1, 33, NULL);
...

void CFlickerFreeDemoDlg::OnTimer(UINT nIDEvent) 
{
	PixelArray.IterateNewContent();
	UpdatePlot();
}

void CFlickerFreeDemoDlg::UpdatePlot()
{		
	Invalidate();
	UpdateWindow();	
}

3 Responses to “Flicker Free example with dialog”

1. Matthias Pospiech :: MFC: Flicker Free example with CStatic Control sagt:

   April 27, 2007 um 1:14 pm

   [...] It works very similar to the description of Flicker Free example with dialog. [...]
2. Maximus sagt:

   Dezember 20, 2007 um 10:45 am

   I would like to see a continuation of the topic
3. Matthias Pospiech sagt:

   Dezember 21, 2007 um 2:00 pm

   What exactly do you want to see?

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