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Date: Fri, 13 Feb 2004 17:03:16 +0100 From: Max Horn Subject: Modifier key fix The internal modifier state can get out of sync with reality. To trigger this, do for example this: 1) Launch an SDL app 2) Alt-click on the desktop (this will hide the SDL app). 3) Bring the SDL app back to the front 4) SDL will still think alt is pressed (and as such will treat left clicks like middle clicks). If you press and release alt, it'll be fine again. The attached patch cures this by rechecking the modifier state whenever we process an event.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 13 Feb 2004 17:57:16 +0000
parents 355632dca928
children
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<HTML
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><TITLE
>SDL_GetModState</TITLE
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><H1
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>SDL_GetModState</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5721"
></A
><H2
>Name</H2
>SDL_GetModState&nbsp;--&nbsp;Get the state of modifier keys.</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN5724"
></A
><H2
>Synopsis</H2
><DIV
CLASS="FUNCSYNOPSIS"
><A
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><P
></P
><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
><P
><CODE
><CODE
CLASS="FUNCDEF"
>SDLMod <B
CLASS="FSFUNC"
>SDL_GetModState</B
></CODE
>(void);</CODE
></P
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5731"
></A
><H2
>Description</H2
><P
>Returns the current state of the modifier keys (CTRL, ALT, etc.).</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN5734"
></A
><H2
>Return Value</H2
><P
>The return value can be an OR'd combination of the SDLMod enum.</P
><P
><A
NAME="AEN5738"
></A
><BLOCKQUOTE
CLASS="BLOCKQUOTE"
><P
><B
>SDLMod</B
></P
><PRE
CLASS="PROGRAMLISTING"
>typedef enum {
  KMOD_NONE  = 0x0000,
  KMOD_LSHIFT= 0x0001,
  KMOD_RSHIFT= 0x0002,
  KMOD_LCTRL = 0x0040,
  KMOD_RCTRL = 0x0080,
  KMOD_LALT  = 0x0100,
  KMOD_RALT  = 0x0200,
  KMOD_LMETA = 0x0400,
  KMOD_RMETA = 0x0800,
  KMOD_NUM   = 0x1000,
  KMOD_CAPS  = 0x2000,
  KMOD_MODE  = 0x4000,
} SDLMod;</PRE
></BLOCKQUOTE
>
SDL also defines the following symbols for convenience:
<A
NAME="AEN5741"
></A
><BLOCKQUOTE
CLASS="BLOCKQUOTE"
><PRE
CLASS="PROGRAMLISTING"
>#define KMOD_CTRL (KMOD_LCTRL|KMOD_RCTRL)
#define KMOD_SHIFT  (KMOD_LSHIFT|KMOD_RSHIFT)
#define KMOD_ALT  (KMOD_LALT|KMOD_RALT)
#define KMOD_META (KMOD_LMETA|KMOD_RMETA)</PRE
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>See Also</H2
><P
><A
HREF="sdlgetkeystate.html"
><TT
CLASS="FUNCTION"
>SDL_GetKeyState</TT
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