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Fixed bug #750 Since many different event structures include windowID it should be placed near the beginning of the structure (preferably right after type) so it's position is the same between different events. This is to avoid code like this: if (event.type == SDL_WINDOWEVENT) win = event.window.windowID; else if ((SDL_EVENTMASK(event.type) & SDL_KEYEVENTMASK) != 0) win = event.key.windowID; else if (event.type == SDL_TEXTINPUT) win = event.text.windowID; else if (event.type == SDL_MOUSEMOTION) win = event.motion.windowID; else if ((SDL_EVENTMASK(event.type) & (SDL_MOUBUTTONDOWNMASK | SDL_MOUBUTTONUPMASK)) != 0) win = event.button.windowID; else if (event.type == SDL_MOUSEWHEEL) win = event.wheel.windowID; ... in favor of: win = event.window.windowID;
author Sam Lantinga <slouken@libsdl.org>
date Wed, 10 Jun 2009 14:00:21 +0000
parents 355632dca928
children
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<HTML
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>SDL_PumpEvents</TITLE
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><H1
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>SDL_PumpEvents</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5387"
></A
><H2
>Name</H2
>SDL_PumpEvents&nbsp;--&nbsp;Pumps the event loop, gathering events from the input devices.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN5390"
></A
><H2
>Synopsis</H2
><DIV
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><A
NAME="AEN5391"
></A
><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>void <B
CLASS="FSFUNC"
>SDL_PumpEvents</B
></CODE
>(void);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
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></A
><H2
>Description</H2
><P
>Pumps the event loop, gathering events from the input devices.</P
><P
><TT
CLASS="FUNCTION"
>SDL_PumpEvents</TT
> gathers all the pending input information from devices and places it on the event queue. Without calls to <TT
CLASS="FUNCTION"
>SDL_PumpEvents</TT
> no events would ever be placed on the queue. Often calls the need for <TT
CLASS="FUNCTION"
>SDL_PumpEvents</TT
> is hidden from the user since <A
HREF="sdlpollevent.html"
><TT
CLASS="FUNCTION"
>SDL_PollEvent</TT
></A
> and <A
HREF="sdlwaitevent.html"
><TT
CLASS="FUNCTION"
>SDL_WaitEvent</TT
></A
> implicitly call <TT
CLASS="FUNCTION"
>SDL_PumpEvents</TT
>. However, if you are not polling or waiting for events (e.g. you are filtering them), then you must call <TT
CLASS="FUNCTION"
>SDL_PumpEvents</TT
> to force an event queue update.</P
><DIV
CLASS="NOTE"
><BLOCKQUOTE
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><P
><B
>Note: </B
>You can only call this function in the thread that set the video mode.</P
></BLOCKQUOTE
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><A
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></A
><H2
>See Also</H2
><P
><A
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><TT
CLASS="FUNCTION"
>SDL_PollEvent</TT
></A
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