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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
parents
children 55f1f1b3e27d
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+++ b/docs/html/sdljoyballevent.html	Thu Apr 26 16:45:43 2001 +0000
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+<HTML
+><HEAD
+><TITLE
+>SDL_JoyBallEvent</TITLE
+><META
+NAME="GENERATOR"
+CONTENT="Modular DocBook HTML Stylesheet Version 1.61
+"><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="AEN3888"
+></A
+><H2
+>Name</H2
+>SDL_JoyBallEvent&nbsp;--&nbsp;Joystick trackball motion event structure</DIV
+><DIV
+CLASS="REFSECT1"
+><A
+NAME="AEN3891"
+></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="AEN3894"
+></A
+><H2
+>Structure Data</H2
+><DIV
+CLASS="INFORMALTABLE"
+><A
+NAME="AEN3896"
+></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="AEN3917"
+></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="AEN3931"
+></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
+>
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