Fixed bug #382

Added horizontal scrolling support: SDL_BUTTON_WHEELLEFT (6) and SDL_BUTTON_WHEELRIGHT (7)

WhatsNew

@@ -7,6 +7,8 @@ Version 1.0:
 	Added SDL_VIDEO_ALLOW_SCREENSAVER to override SDL's disabling
 	of the screensaver on Mac OS X and X11.
 
+	Added SDL_BUTTON_WHEELLEFT (6) and SDL_BUTTON_WHEELRIGHT (7)
+
 1.2.10:
 	If SDL_OpenAudio() is passed zero for the desired format
 	fields, the following environment variables will be used

docs.html

@@ -28,6 +28,9 @@ <H3> General Notes </H3>
 <P>
 	Added SDL_VIDEO_ALLOW_SCREENSAVER to override SDL's disabling of the screensaver on Mac OS X, Windows, and X11.
 </P>
+<P>
+	Added SDL_BUTTON_WHEELLEFT (6) and SDL_BUTTON_WHEELRIGHT (7)
+</P>
 <P>
 	Fixed buffer overrun crash when resampling audio rates.
 </P>

include/SDL_mouse.h

@@ -115,13 +115,17 @@ extern DECLSPEC int SDLCALL SDL_ShowCursor(int toggle);
    Button 3:	Right mouse button
    Button 4:	Mouse wheel up	 (may also be a real button)
    Button 5:	Mouse wheel down (may also be a real button)
+   Button 6:	Mouse wheel left (may also be a real button)
+   Button 7:	Mouse wheel right (may also be a real button)
  */
 #define SDL_BUTTON(X)		(1 << ((X)-1))
 #define SDL_BUTTON_LEFT		1
 #define SDL_BUTTON_MIDDLE	2
 #define SDL_BUTTON_RIGHT	3
 #define SDL_BUTTON_WHEELUP	4
 #define SDL_BUTTON_WHEELDOWN	5
+#define SDL_BUTTON_WHEELLEFT	6
+#define SDL_BUTTON_WHEELRIGHT	7
 #define SDL_BUTTON_LMASK	SDL_BUTTON(SDL_BUTTON_LEFT)
 #define SDL_BUTTON_MMASK	SDL_BUTTON(SDL_BUTTON_MIDDLE)
 #define SDL_BUTTON_RMASK	SDL_BUTTON(SDL_BUTTON_RIGHT)

src/video/bwindow/SDL_sysevents.cc

@@ -294,12 +294,23 @@ SDL_WarpMouse((int)center.x*2-1,(int)center.y*2-1);
 			float x, y;
 			x = y = 0;
 			if (msg->FindFloat("be:wheel_delta_x", &x) == B_OK && msg->FindFloat("be:wheel_delta_y", &y) == B_OK) {
-				if (x < 0 || y < 0) {
-					SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELDOWN, 0, 0);
-					SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELDOWN, 0, 0);
-				} else if (x > 0 || y > 0) {
-					SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELUP, 0, 0);
-					SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELUP, 0, 0);
+				if ( y ) {
+					if (y < 0) {
+						SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELDOWN, 0, 0);
+						SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELDOWN, 0, 0);
+					} else {
+						SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELUP, 0, 0);
+						SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELUP, 0, 0);
+					}
+				}
+				if ( x ) {
+					if (x < 0) {
+						SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELRIGHT, 0, 0);
+						SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELRIGHT, 0, 0);
+					} else {
+						SDL_PrivateMouseButton(SDL_PRESSED, SDL_BUTTON_WHEELLEFT, 0, 0);
+						SDL_PrivateMouseButton(SDL_RELEASED, SDL_BUTTON_WHEELLEFT, 0, 0);
+					}
 				}
 			}
 			break;

src/video/quartz/SDL_QuartzEvents.m

@@ -932,13 +932,24 @@ disassociated from the mouse (and therefore
                         Uint8 button;
                         dy = [ event deltaY ];
                         dx = [ event deltaX ];
-                        if ( dy > 0.0 || dx > 0.0 ) /* Scroll up */
-                            button = SDL_BUTTON_WHEELUP;
-                        else /* Scroll down */
-                            button = SDL_BUTTON_WHEELDOWN;
-                        /* For now, wheel is sent as a quick down+up */
-                        SDL_PrivateMouseButton (SDL_PRESSED, button, 0, 0);
-                        SDL_PrivateMouseButton (SDL_RELEASED, button, 0, 0);
+			if ( dy ) {
+				if ( dy > 0.0 ) /* Scroll up */
+				    button = SDL_BUTTON_WHEELUP;
+				else /* Scroll down */
+				    button = SDL_BUTTON_WHEELDOWN;
+				/* For now, wheel is sent as a quick down+up */
+				SDL_PrivateMouseButton (SDL_PRESSED, button, 0, 0);
+				SDL_PrivateMouseButton (SDL_RELEASED, button, 0, 0);
+			}
+			if ( dx ) {
+				if ( dx > 0.0 ) /* Scroll left */
+				    button = SDL_BUTTON_WHEELLEFT;
+				else /* Scroll right */
+				    button = SDL_BUTTON_WHEELRIGHT;
+				/* For now, wheel is sent as a quick down+up */
+				SDL_PrivateMouseButton (SDL_PRESSED, button, 0, 0);
+				SDL_PrivateMouseButton (SDL_RELEASED, button, 0, 0);
+			}
                     }
                     break;
                 case NSKeyUp: