4 >SDL_JoyBallEvent</TITLE
7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
10 TITLE="SDL Library Documentation"
11 HREF="index.html"><LINK
13 TITLE="SDL Event Structures."
14 HREF="eventstructures.html"><LINK
16 TITLE="SDL_JoyHatEvent"
17 HREF="sdljoyhatevent.html"><LINK
19 TITLE="SDL_ResizeEvent"
20 HREF="sdlresizeevent.html"></HEAD
31 SUMMARY="Header navigation table"
40 >SDL Library Documentation</TH
48 HREF="sdljoyhatevent.html"
62 HREF="sdlresizeevent.html"
73 NAME="SDLJOYBALLEVENT"
83 >SDL_JoyBallEvent -- Joystick trackball motion event structure</DIV
90 >Structure Definition</H2
92 CLASS="PROGRAMLISTING"
98 } SDL_JoyBallEvent;</PRE
108 CLASS="INFORMALTABLE"
133 >SDL_JOYBALLMOTION</TT
149 >Joystick device index</TD
164 >Joystick trackball index</TD
184 >The relative motion in the X/Y direction</TD
202 >SDL_JoyBallEvent</SPAN
203 > is a member of the <A
209 > union and is used when an event of type <TT
211 >SDL_JOYBALLMOTION</TT
216 >SDL_JOYBALLMOTION</TT
217 > event occurs when a user moves a trackball on the joystick. The field <TT
222 > is the index of the joystick that reported the event and <TT
227 > is the index of the trackball (for a more detailed explaination see the <A
230 >). 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
259 >Joystick Functions</A
262 HREF="sdljoystickeventstate.html"
265 >SDL_JoystickEventState</TT
269 HREF="sdljoystickgetball.html"
272 >SDL_JoystickGetBall</TT
281 SUMMARY="Footer navigation table"
292 HREF="sdljoyhatevent.html"
310 HREF="sdlresizeevent.html"
326 HREF="eventstructures.html"