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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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>Event Functions.</TITLE
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><H1
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><A
NAME="EVENTFUNCTIONS"
>Event Functions.</A
></H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="sdlpumpevents.html"
>SDL_PumpEvents</A
> &#8212; Pumps the event loop, gathering events from the input devices.</DT
><DT
><A
HREF="sdlpeepevents.html"
>SDL_PeepEvents</A
> &#8212; Checks the event queue for messages and optionally returns them.</DT
><DT
><A
HREF="sdlpollevent.html"
>SDL_PollEvent</A
> &#8212; Polls for currently pending events.</DT
><DT
><A
HREF="sdlwaitevent.html"
>SDL_WaitEvent</A
> &#8212; Waits indefinitely for the next available event.</DT
><DT
><A
HREF="sdlpushevent.html"
>SDL_PushEvent</A
> &#8212; Pushes an event onto the event queue</DT
><DT
><A
HREF="sdlseteventfilter.html"
>SDL_SetEventFilter</A
> &#8212; Sets up a filter to process all events before they are posted 
to the event queue.</DT
><DT
><A
HREF="sdlgeteventfilter.html"
>SDL_GetEventFilter</A
> &#8212; Retrieves a pointer to he event filter</DT
><DT
><A
HREF="sdleventstate.html"
>SDL_EventState</A
> &#8212; This function allows you to set the state of processing certain events.</DT
><DT
><A
HREF="sdlgetkeystate.html"
>SDL_GetKeyState</A
> &#8212; Get a snapshot of the current keyboard state</DT
><DT
><A
HREF="sdlgetmodstate.html"
>SDL_GetModState</A
> &#8212; Get the state of modifier keys.</DT
><DT
><A
HREF="sdlsetmodstate.html"
>SDL_SetModState</A
> &#8212; Set the current key modifier state</DT
><DT
><A
HREF="sdlgetkeyname.html"
>SDL_GetKeyName</A
> &#8212; Get the name of an SDL virtual keysym</DT
><DT
><A
HREF="sdlenableunicode.html"
>SDL_EnableUNICODE</A
> &#8212; Enable UNICODE translation</DT
><DT
><A
HREF="sdlenablekeyrepeat.html"
>SDL_EnableKeyRepeat</A
> &#8212; Set keyboard repeat rate.</DT
><DT
><A
HREF="sdlgetmousestate.html"
>SDL_GetMouseState</A
> &#8212; Retrieve the current state of the mouse</DT
><DT
><A
HREF="sdlgetrelativemousestate.html"
>SDL_GetRelativeMouseState</A
> &#8212; Retrieve the current state of the mouse</DT
><DT
><A
HREF="sdlgetappstate.html"
>SDL_GetAppState</A
> &#8212; Get the state of the application</DT
><DT
><A
HREF="sdljoystickeventstate.html"
>SDL_JoystickEventState</A
> &#8212; Enable/disable joystick event polling</DT
></DL
></DIV
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN4928"
></A
><P
></P
><TABLE
BORDER="0"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlpumpevents.html"
>SDL_PumpEvents</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Pumps the event loop, gathering events from the input devices</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlpeepevents.html"
>SDL_PeepEvents</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Checks the event queue for messages and optionally returns them</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlpollevent.html"
>SDL_PollEvent</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Polls for currently pending events</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlwaitevent.html"
>SDL_WaitEvent</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Waits indefinitely for the next available event</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlpushevent.html"
>SDL_PushEvent</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Pushes an event onto the event queue</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlseteventfilter.html"
>SDL_SetEventFilter</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Sets up a filter to process all events</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdleventstate.html"
>SDL_EventState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Allows you to set the state of processing certain events</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlgetkeystate.html"
>SDL_GetKeyState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Get a snapshot of the current keyboard state</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlgetmodstate.html"
>SDL_GetModState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Get the state of modifier keys</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlsetmodstate.html"
>SDL_SetModState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Set the state of modifier keys</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlgetkeyname.html"
>SDL_GetKeyName</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Get the name of an SDL virtual keysym</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlenableunicode.html"
>SDL_EnableUNICODE</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Enable UNICODE translation</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlenablekeyrepeat.html"
>SDL_EnableKeyRepeat</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Set keyboard repeat rate</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlgetmousestate.html"
>SDL_GetMouseState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Retrieve the current state of the mouse</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlgetrelativemousestate.html"
>SDL_GetRelativeMouseState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Retrieve the current state of the mouse</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdlgetappstate.html"
>SDL_GetAppState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Get the state of the application</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><A
HREF="sdljoystickeventstate.html"
>SDL_JoystickEventState</A
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>Enable/disable joystick event polling</TD
></TR
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