Window updating via Win32 API

[YL3GDY]

Hi All,

currently I am doing my homework on programming: a programm on C++ which draws in the window an analog clock using LineTo(), Ellipse() and TextOut() functions. I had a problem: I can't force window to redraw it's client area(the clock simply looks stopped). I tried to use SetTimer, and in timer procedure call UpdateWindow, but I had no success.

Can anyone explain, how it can be solved?

P.S. I've written a class, which contains repaint routine. Object of this class is defined as global variable(I know that it's stupid, but I haven't thought of something more clever that works in callback and regular functions).

 

[GLS]

There has been sometime since I've done Win32 apps...:hmm:
I think you should draw the clock when you recieve the WM_PAINT message.
To *force* a redraw, send a WM_PAINT message, using SendMessage(), from a SetTimer call.

Hope it works....

 

[agentgonzo]

To *force* a redraw, send a WM_PAINT message, using SendMessage(), from a SetTimer call.

Actually, it's much better to call InvalidateRect() or Invalidate() to force a redraw rather than manually sending the MW_PAINT message. Assuming you're using GDI/MFC that is...

 

[YL3GDY]

Thank you for your info! I've tried to use GetClientRect and InvalidateRect(), looks like it works (at least!).