332 lines
4.2 KiB
HTML
332 lines
4.2 KiB
HTML
<HTML
|
|
><HEAD
|
|
><TITLE
|
|
>SDL_JoyBallEvent</TITLE
|
|
><META
|
|
NAME="GENERATOR"
|
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
|
|
"><LINK
|
|
REL="HOME"
|
|
TITLE="SDL Library Documentation"
|
|
HREF="index.html"><LINK
|
|
REL="UP"
|
|
TITLE="SDL Event Structures."
|
|
HREF="eventstructures.html"><LINK
|
|
REL="PREVIOUS"
|
|
TITLE="SDL_JoyHatEvent"
|
|
HREF="sdljoyhatevent.html"><LINK
|
|
REL="NEXT"
|
|
TITLE="SDL_ResizeEvent"
|
|
HREF="sdlresizeevent.html"></HEAD
|
|
><BODY
|
|
CLASS="REFENTRY"
|
|
BGCOLOR="#FFF8DC"
|
|
TEXT="#000000"
|
|
LINK="#0000ee"
|
|
VLINK="#551a8b"
|
|
ALINK="#ff0000"
|
|
><DIV
|
|
CLASS="NAVHEADER"
|
|
><TABLE
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TH
|
|
COLSPAN="3"
|
|
ALIGN="center"
|
|
>SDL Library Documentation</TH
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="left"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="sdljoyhatevent.html"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="80%"
|
|
ALIGN="center"
|
|
VALIGN="bottom"
|
|
></TD
|
|
><TD
|
|
WIDTH="10%"
|
|
ALIGN="right"
|
|
VALIGN="bottom"
|
|
><A
|
|
HREF="sdlresizeevent.html"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"></DIV
|
|
><H1
|
|
><A
|
|
NAME="SDLJOYBALLEVENT"
|
|
>SDL_JoyBallEvent</A
|
|
></H1
|
|
><DIV
|
|
CLASS="REFNAMEDIV"
|
|
><A
|
|
NAME="AEN3963"
|
|
></A
|
|
><H2
|
|
>Name</H2
|
|
>SDL_JoyBallEvent -- Joystick trackball motion event structure</DIV
|
|
><DIV
|
|
CLASS="REFSECT1"
|
|
><A
|
|
NAME="AEN3966"
|
|
></A
|
|
><H2
|
|
>Structure Definition</H2
|
|
><PRE
|
|
CLASS="PROGRAMLISTING"
|
|
>typedef struct{
|
|
Uint8 type;
|
|
Uint8 which;
|
|
Uint8 ball;
|
|
Sint16 xrel, yrel;
|
|
} SDL_JoyBallEvent;</PRE
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT1"
|
|
><A
|
|
NAME="AEN3969"
|
|
></A
|
|
><H2
|
|
>Structure Data</H2
|
|
><DIV
|
|
CLASS="INFORMALTABLE"
|
|
><A
|
|
NAME="AEN3971"
|
|
></A
|
|
><P
|
|
></P
|
|
><TABLE
|
|
BORDER="0"
|
|
CLASS="CALSTABLE"
|
|
><TBODY
|
|
><TR
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
><TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>type</I
|
|
></TT
|
|
></TD
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
><TT
|
|
CLASS="LITERAL"
|
|
>SDL_JOYBALLMOTION</TT
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
><TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>which</I
|
|
></TT
|
|
></TD
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
>Joystick device index</TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
><TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>ball</I
|
|
></TT
|
|
></TD
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
>Joystick trackball index</TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
><TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>xrel</I
|
|
></TT
|
|
>, <TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>yrel</I
|
|
></TT
|
|
></TD
|
|
><TD
|
|
ALIGN="LEFT"
|
|
VALIGN="TOP"
|
|
>The relative motion in the X/Y direction</TD
|
|
></TR
|
|
></TBODY
|
|
></TABLE
|
|
><P
|
|
></P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT1"
|
|
><A
|
|
NAME="AEN3992"
|
|
></A
|
|
><H2
|
|
>Description</H2
|
|
><P
|
|
><SPAN
|
|
CLASS="STRUCTNAME"
|
|
>SDL_JoyBallEvent</SPAN
|
|
> is a member of the <A
|
|
HREF="sdlevent.html"
|
|
><SPAN
|
|
CLASS="STRUCTNAME"
|
|
>SDL_Event</SPAN
|
|
></A
|
|
> union and is used when an event of type <TT
|
|
CLASS="LITERAL"
|
|
>SDL_JOYBALLMOTION</TT
|
|
> is reported.</P
|
|
><P
|
|
>A <TT
|
|
CLASS="LITERAL"
|
|
>SDL_JOYBALLMOTION</TT
|
|
> event occurs when a user moves a trackball on the joystick. The field <TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>which</I
|
|
></TT
|
|
> is the index of the joystick that reported the event and <TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>ball</I
|
|
></TT
|
|
> is the index of the trackball (for a more detailed explaination see the <A
|
|
HREF="joystick.html"
|
|
>Joystick section</A
|
|
>). Trackballs only return relative motion, this is the change in position on the ball since it was last polled (last cycle of the event loop) and it is stored in <TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>xrel</I
|
|
></TT
|
|
> and <TT
|
|
CLASS="STRUCTFIELD"
|
|
><I
|
|
>yrel</I
|
|
></TT
|
|
>.</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="REFSECT1"
|
|
><A
|
|
NAME="AEN4006"
|
|
></A
|
|
><H2
|
|
>See Also</H2
|
|
><P
|
|
><A
|
|
HREF="sdlevent.html"
|
|
><SPAN
|
|
CLASS="STRUCTNAME"
|
|
>SDL_Event</SPAN
|
|
></A
|
|
>,
|
|
<A
|
|
HREF="joystick.html"
|
|
>Joystick Functions</A
|
|
>,
|
|
<A
|
|
HREF="sdljoystickeventstate.html"
|
|
><TT
|
|
CLASS="FUNCTION"
|
|
>SDL_JoystickEventState</TT
|
|
></A
|
|
>,
|
|
<A
|
|
HREF="sdljoystickgetball.html"
|
|
><TT
|
|
CLASS="FUNCTION"
|
|
>SDL_JoystickGetBall</TT
|
|
></A
|
|
></P
|
|
></DIV
|
|
><DIV
|
|
CLASS="NAVFOOTER"
|
|
><HR
|
|
ALIGN="LEFT"
|
|
WIDTH="100%"><TABLE
|
|
WIDTH="100%"
|
|
BORDER="0"
|
|
CELLPADDING="0"
|
|
CELLSPACING="0"
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="sdljoyhatevent.html"
|
|
>Prev</A
|
|
></TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="index.html"
|
|
>Home</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="sdlresizeevent.html"
|
|
>Next</A
|
|
></TD
|
|
></TR
|
|
><TR
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="left"
|
|
VALIGN="top"
|
|
>SDL_JoyHatEvent</TD
|
|
><TD
|
|
WIDTH="34%"
|
|
ALIGN="center"
|
|
VALIGN="top"
|
|
><A
|
|
HREF="eventstructures.html"
|
|
>Up</A
|
|
></TD
|
|
><TD
|
|
WIDTH="33%"
|
|
ALIGN="right"
|
|
VALIGN="top"
|
|
>SDL_ResizeEvent</TD
|
|
></TR
|
|
></TABLE
|
|
></DIV
|
|
></BODY
|
|
></HTML
|
|
> |