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Fixed bug #61 Date: Mon, 24 Feb 2003 13:35:11 +0800 From: "Leonidas" Subject: [SDL] Re: Trigger mouse wheel event -- not in X-environment I have looked into the codes for the IMPS/2 mouse wheel mode of fbcon driver. But I found something weird. Here's the original codes to set a mouse device into IMPS/2 mode in libSDL. In the file src/video/fbcon/SDL_fbevents.c In function static int set_imps2_mode(int fd) ... Uint8 set_imps2[] = {0xf3, 200, 0xf3, 100, 0xf3, 80}; Uint8 reset = 0xff; fd_set fdset; struct timeval tv; int retval = 0; // Set mouse device fd into IMPS/2 mode if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { // ??? then RESET it..??? if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { retval = 1; } } ........... Since it sets IMPS/2 mode then reset it, so you will never get a mouse into IMPS/2 mode to use its wheel. What I did to make the wheel usable is remove the RESET codes. .... if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) { /* if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) { } */ retval = 1; } .... And in FB_OpenMouse(_THIS) Make the device /dev/psaux to be setted into imps2 mode such that it can be detected its a imps/2 mouse or not. (my mouse device is on ps2, but the codes only set /dev/input/mice device originally) Then I have done, I can use the mouse wheel when SDL uses frame buff driver. I dont exactly know I did right or wrong, I just change it for my usuage. Correct me please, if I did something wrong. Best regards, Li Tsung Lin IAP Product Dept. Engineer EeRise Corp. (Image Processing System, Computer Vision System) Hsin Tien, Taipei Hsien, Taiwan, R.O.C.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 07:22:40 +0000
parents 355632dca928
children
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<HTML
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>SDL_EventState</TITLE
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>SDL_EventState</H1
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><H2
>Name</H2
>SDL_EventState&nbsp;--&nbsp;This function allows you to set the state of processing certain events.</DIV
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><PRE
CLASS="FUNCSYNOPSISINFO"
>#include "SDL.h"</PRE
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><CODE
><CODE
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>Uint8 <B
CLASS="FSFUNC"
>SDL_EventState</B
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>(Uint8 type, int state);</CODE
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><H2
>Description</H2
><P
>This function allows you to set the state of processing certain event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
>'s.</P
><P
>If <TT
CLASS="PARAMETER"
><I
>state</I
></TT
> is set to <TT
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>SDL_IGNORE</TT
>, 
that event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
> will be automatically dropped from the event queue and will 
not be filtered.</P
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>If <TT
CLASS="PARAMETER"
><I
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></TT
> is set to <TT
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>SDL_ENABLE</TT
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that event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
> will be processed normally.</P
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>If <TT
CLASS="PARAMETER"
><I
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></TT
> is set to <TT
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>SDL_QUERY</TT
>,
<TT
CLASS="FUNCTION"
>SDL_EventState</TT
> will return the current processing 
state of the specified event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
>.</P
><P
>A list of event <TT
CLASS="PARAMETER"
><I
>type</I
></TT
>'s can be found in the <A
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>SDL_Event</SPAN
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