view docs/html/time.html @ 320:66f815c147ed

Date: Thu, 28 Mar 2002 09:20:03 +0200 From: "Mike Gorchak" <mike@malva.ua> Subject: New QNX patch. Hi ! 1. Removed warning (possible bug) with invalid type, passing to the function in ph_WarpedMotion. 2. Rewritten handler of Ph_WM_RESIZE message, now works, but buggy (old handler doesn't work at all). 3. Added stub handler for Ph_WM_MAX (maximize) message. 4. Added more #ifdef HAVE_OPENGL to disable OpenGL stuff when it not needed. 5. Added support for SDL_NOFRAME and SDL_RESIZABLE flags (in OpenGL windows too). 6. Added cosmetic changes, if no SDL_RESIZABLE flag defined, disable resize handlers in window border and maximize button at caption. 7. Fixed my bug with invalid arguments count passed to PtCreateWidget call. 8. Fixed some palette problems. 9. Updated README.QNX file. And I changed testgl.c test application: 10. Added in testgl.c application support for SDL_NOFRAME flag and option -noframe.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 28 Mar 2002 16:20:10 +0000
parents 55f1f1b3e27d
children 355632dca928
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>Chapter 13. Time</A
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><DT
><A
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>SDL_GetTicks</A
> &#8212; Get the number of milliseconds since the SDL library initialization.</DT
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>SDL_Delay</A
> &#8212; Wait a specified number of milliseconds before returning.</DT
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> &#8212; Add a timer which will call a callback after the specified number of milliseconds has
elapsed.</DT
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>SDL_RemoveTimer</A
> &#8212; Remove a timer which was added with
<A
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>.</DT
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>SDL_SetTimer</A
> &#8212; Set a callback to run after the specified number of milliseconds has
elapsed.</DT
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><P
>SDL provides several cross-platform functions for dealing with time.
It provides a way to get the current time, a way to wait a little while,
and a simple timer mechanism.  These functions give you two ways of moving an
object every x milliseconds:

<P
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>Use a timer callback function.  This may have the bad effect that it runs in a seperate thread or uses alarm signals, but it's easier to implement.</P
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>Or you can get the number of milliseconds passed, and move the object if, for example, 30 ms passed.</P
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