Questions for the pros

Xtreme · 2000-07-19T19:28:24

Hello ppl, I have a number of questions to ask related to OpenGL (3rd question is not related to OpenGL): 1. If I have an object/picture on the screen, how do I fade in/out the entire screen? 2. How do I "clip" the upper and lower portions of the screen. For example, you might have seen when watching a film at the movies. Note: I have used glViewPort() but couldn''t get it to work the way i wanted to. 3. How do I stop an application window from moving? Is there a command to disable it? sig u say?

Graphics and GPU Programming Programming

Started by Xtreme July 17, 2000 01:06 AM

17 comments, last by Xtreme 23 years, 9 months ago

baskuenen

124

July 18, 2000 11:42 PM

Extreme, I don't know if this works but you can give it a try:

        case WM_NCHITTEST:{  LRESULT lResult = DefWindowProc(.....);  if (lResult==HT_CLOSE)  { DestroyWindow(hWnd);  }  return lResult;}

You can also make a window without a border and do a DestroyWindow on a WM_KEYUP with VK_ESCAPE...

(ps: calling PostQuitMessage(0) will work, but is not so nice. Better to call DestroyWindow(hWnd), then do the PostQuitMessage(0) in the WM_DESTROY)

Edited by - baskuenen on July 18, 2000 12:44:15 AM

Xtreme

122

Author

July 19, 2000 12:25 AM

thanx Serge. that one is even better and is shorter to write

sig u say?

Yes! There are kangaroos in Australia but I haven't seen them...yet

Xtreme

122

Author

July 19, 2000 12:36 AM

baskuenen the code u wrote doesn''t work properly.
as soon as i run the program it quits! i tried postquitmessage
instead of destroy window and that didnt work either

by the way, its HTCLOSE...

sig u say?

Yes! There are kangaroos in Australia but I haven't seen them...yet

maikgerth

122

July 19, 2000 09:36 AM

u forgot the "break" of the switch case probably --> it runs in the next case

Xtreme

122

Author

July 19, 2000 06:59 PM

i should''ve known! thanx

but instead of clicking the close button, the program quits when the mouse goes over it....

sig u say?

Yes! There are kangaroos in Australia but I haven't seen them...yet

CondorWitte

122

July 19, 2000 07:09 PM

To stop a window from moving, overriding the default handler for WM_MOVING does work, but slightly different:

Instead of just returning NULL, you should set the values of the rectangle in lParam to those of the current window-rectangle...

Hope this works for your program.

Greetings, CondorWitte

Anonymous

July 19, 2000 07:19 PM

Regarding Q2, Isn''t the scissor test usable here?

Xtreme

122

Author

July 19, 2000 07:22 PM

yes it is Anon. See above.

sig u say?

Yes! There are kangaroos in Australia but I haven't seen them...yet

Xtreme

122

Author

July 19, 2000 07:28 PM

i understand what you mean there CondorWitte but the window might wove a bit before it goes back to its position. What i want is like when you right click your mouse on that application you see options such as "restore, maximise, minise, move" etc.
Now if I use SYS_MENU when setting up my menu, I can see that the Maximum & Minimum options are disabled, but Move option isn''t! I want to know what command disables the "MOVE" option from the menu.

sig u say?

Yes! There are kangaroos in Australia but I haven't seen them...yet

Questions for the pros

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