From d2119c1ad98f5abbd7ea849efcb74dcbb712fe88 Mon Sep 17 00:00:00 2001
From: pagefault <>
Date: Wed, 25 Apr 2001 04:08:32 +0000
Subject: [PATCH] Added trackball support (hpsolo)

---
 zsnes/src/linux/sdllink.c | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/zsnes/src/linux/sdllink.c b/zsnes/src/linux/sdllink.c
index 5ad6d139..f1c702d5 100644
--- a/zsnes/src/linux/sdllink.c
+++ b/zsnes/src/linux/sdllink.c
@@ -195,7 +195,35 @@ int Main_Proc(void)
 		case SDL_MOUSEBUTTONUP:
 			MouseButton = MouseButton & ~event.button.button;
 			break;
- 
+
+		/*
+		  joystick trackball code untested; change the test values
+		  if the motion is too sensitive (or not sensitive enough);
+		  only the first trackball is supported for now. we could get
+	          really general here, but this may break the format of 'pressed'
+		*/
+		case SDL_JOYBALLMOTION:
+		        CurrentJoy = event.jball.which;
+			if (event.jball.jball == 0) {
+			        if (event.jball.xrel < -100) {
+			                pressed[0x100 + CurrentJoy*32 + 6] = 0;
+					pressed[0x100 + CurrentJoy*32 + 7] = 1;
+				}
+				if (event.jball.xrel > 100) {
+				        pressed[0x100 + CurrentJoy*32 + 6] = 1;
+					pressed[0x100 + CurrentJoy*32 + 7] = 0;
+				}
+				if (event.jball.yrel < -100) {
+				        pressed[0x100 + CurrentJoy*32 + 8] = 0;
+				        pressed[0x100 + CurrentJoy*32 + 9] = 1;
+				}
+				if (event.jball.yrel > 100) {
+				        pressed[0x100 + CurrentJoy*32 + 8] = 1;
+					pressed[0x100 + CurrentJoy*32 + 9] = 0;
+				}
+			}
+			break;
+
 		case SDL_JOYAXISMOTION:
 			CurrentJoy = event.jaxis.which;
 			for (j=0; j<3; j++) {