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Date: Thu, 17 Apr 2003 23:27:34 -0400 From: Darrell Walisser Subject: Yet another OS X cursor bug The synopsis: 1. Call SDL_ShowCursor(0); 2. Call SDL_SetVideoMode(); 3. Call SDL_GetEvent(); 3. Call SDL_ShowCursor(1); The result: Sometimes the cursor doesn't come back! Ack! Oddly enough, it does come back when mousing over the dock or clicking in the menu bar. But that's besides the point. The reason why this is happening is a flaw in the handling of activation/deactivation events. The short explanation is that the HideCursor() and ShowCursor() calls must be balanced, but if the cursor was initially hidden, HideCursor() was called again on the activate event - so now the next ShowCursor() fails (as does the next, and the next, for some reason). So, here's the patch. All it does is keep track of the HideCursor()/ShowCursor() calls so that they will always be balanced.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 20 Apr 2003 05:41:16 +0000
parents e5bc29de3f0a
children 355632dca928
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<HTML
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>SDL_SysWMEvent</TITLE
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><H1
><A
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>SDL_SysWMEvent</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN4154"
></A
><H2
>Name</H2
>SDL_SysWMEvent&nbsp;--&nbsp;Platform-dependent window manager event.</DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4157"
></A
><H2
>Description</H2
><P
>The system window manager event contains a pointer to system-specific 
information about unknown window manager events.  If you enable this event
using 
<A
HREF="sdleventstate.html"
><TT
CLASS="FUNCTION"
>SDL_EventState()</TT
></A
>, 
it will be generated whenever unhandled events are received from the window 
manager.  This can be used, for example, to implement cut-and-paste in your 
application.

<PRE
CLASS="PROGRAMLISTING"
>typedef struct {
         Uint8 type;   /* Always SDL_SysWM */
 } SDL_SysWMEvent;</PRE
>

If you want to obtain system-specific information about the window manager,
you can fill the version member of a <SPAN
CLASS="STRUCTNAME"
>SDL_SysWMinfo</SPAN
> 
structure (details can be found in <TT
CLASS="FILENAME"
>SDL_syswm.h</TT
>, which must be included) using the <TT
CLASS="FUNCTION"
>SDL_VERSION()</TT
> macro found in 
<TT
CLASS="FILENAME"
>SDL_version.h</TT
>, and pass it to the 
function:
<DIV
CLASS="FUNCSYNOPSIS"
><A
NAME="AEN4167"
></A
><P
></P
><P
><CODE
><CODE
CLASS="FUNCDEF"
>int <B
CLASS="FSFUNC"
>SDL_GetWMInfo</B
></CODE
>(SDL_SysWMinfo *info);</CODE
></P
><P
></P
></DIV
></P
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><A
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></A
><H2
>See Also</H2
><P
><A
HREF="sdleventstate.html"
><TT
CLASS="FUNCTION"
>SDL_EventState</TT
></A
></P
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