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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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><H2
>Name</H2
>SDL_QuitEvent&nbsp;--&nbsp;Quit requested event</DIV
><DIV
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><H2
>Structure Definition</H2
><PRE
CLASS="PROGRAMLISTING"
>typedef struct{
  Uint8 type
} SDL_QuitEvent;</PRE
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>SDL_QUIT</TT
></TD
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><H2
>Description</H2
><P
><SPAN
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>SDL_QuitEvent</SPAN
> is a member of the <A
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><SPAN
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>SDL_Event</SPAN
></A
> union and is used whan an event of type <TT
CLASS="LITERAL"
>SDL_QUIT</TT
> is reported.</P
><P
>As can be seen, the SDL_QuitEvent structure serves no useful purpose. The event itself, on the other hand, is very important. If you filter out or ignore a quit event then it is impossible for the user to close the window. On the other hand, if you do accept a quit event then the application window will be closed, and screen updates will still report success event though the application will no longer be visible.</P
><DIV
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><BLOCKQUOTE
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><P
><B
>Note: </B
>The macro <TT
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>SDL_QuitRequested</TT
> will return non-zero if a quit event is pending</P
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