[Qt-creator] Drawing on QWidget

[Alex Williams]

> I understand that this touches a fundamental problem of epistemology
> but most people I am aware of distinguish between "I cannot observe it"
> and "it does not exist". Those people might also be tempted to take
> http://doc.trolltech.com/4.5/designer-using-custom-widgets.html as an
> indication that your proposition is wrong.

If something is not clear enough or hard to find = it's almost same as
"it does not exists"... I did know that for such primitive action as
drawing something - I nedd create widget...

> This seems to use definition of 'analog/competitor' that I would not
> actively use myself, but out of curiosity: How would that work with
> wxWidgets?

In wxWidgets everything is simple:

void Draw(wxPanel *DS)
{
	wxSize DC_Size;
	DC_Size = DS->GetSize();
	wxClientDC CDC(DS);
	wxBufferedDC DC(&CDC, DC_Size);
	wxBrush BackBrush(*wxWHITE);
	DC.SetBackground(BackBrush);
	DC.Clear();
}

that's all, no problems, no widgets, just paint on everything you want...