Subject: Change weapons with the mouse wheel.
Author: Fabian Greffrath <fabian+debian@greffrath.com>

--- a/id_in.cpp
+++ b/id_in.cpp
@@ -237,6 +237,8 @@ boolean IN_JoyPresent()
     return Joystick != NULL;
 }
 
+boolean mw_dn = false, mw_up = false;
+
 static void processEvent(SDL_Event *event)
 {
     switch (event->type)
@@ -328,6 +330,15 @@ static void processEvent(SDL_Event *even
             break;
         }
 
+        case SDL_MOUSEBUTTONDOWN:
+        {
+            if (event->button.button == SDL_BUTTON_WHEELDOWN)
+                mw_dn = true;
+            else if(event->button.button == SDL_BUTTON_WHEELUP)
+                mw_up = true;
+            break;
+        }
+
         case SDL_ACTIVEEVENT:
         {
             if(fullscreen && (event->active.state & SDL_APPACTIVE) != 0)
--- a/wl_play.cpp
+++ b/wl_play.cpp
@@ -273,6 +273,7 @@ void PollKeyboardButtons (void)
 void PollMouseButtons (void)
 {
     int buttons = IN_MouseButtons ();
+    extern boolean mw_dn, mw_up;
 
     if (buttons & 1)
         buttonstate[buttonmouse[0]] = true;
@@ -280,6 +281,12 @@ void PollMouseButtons (void)
         buttonstate[buttonmouse[1]] = true;
     if (buttons & 4)
         buttonstate[buttonmouse[2]] = true;
+
+    if (mw_dn)
+        buttonstate[bt_prevweapon] = true;
+    if (mw_up)
+        buttonstate[bt_nextweapon] = true;
+    mw_dn = mw_up = false;
 }