Added mouse-as-joystick code from z26. This basically allows the mouse to

act as a controller in joystick-only games.


git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@2200 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba

Changes.txt

@@ -14,6 +14,10 @@
 
 3.3 to 3.4: (xx. xx, 2010)
 
+  * The mouse can now be used in joystick games (ie, moving the mouse
+    emulates joystick directions, and pressing a mouse button emulates
+    the joystick fire button).
+
   * Updated built-in version of the PNG library to the latest version.
 
   * Updated internal ROM properties database to ROM-Hunter version 6

src/emucore/Joystick.cxx

@@ -8,7 +8,7 @@
 //  SS  SS   tt   ee      ll   ll  aa  aa
 //   SSSS     ttt  eeeee llll llll  aaaaa
 //
-// Copyright (c) 1995-2010 by Bradford W. Mott, Stephen Anthony
+// Copyright (c) 1995-2011 by Bradford W. Mott, Stephen Anthony
 // and the Stella Team
 //
 // See the file "License.txt" for information on usage and redistribution of
@@ -85,6 +85,33 @@ void Joystick::update()
   }
   if(yaxis < -16384)
     myDigitalPinState[One] = false;
+
+  // The following code was taken from z26
+  // Mouse events
+#define MJ_Threshold 2
+  int mousex = myEvent.get(Event::MouseAxisXValue),
+      mousey = myEvent.get(Event::MouseAxisYValue);
+  if(mousex || mousey)
+  {
+    if((!(abs(mousey) > abs(mousex) << 1)) && (abs(mousex) >= MJ_Threshold))
+    {
+      if(mousex < 0)
+        myDigitalPinState[Three] = false;
+      else if (mousex > 0)
+        myDigitalPinState[Four] = false;
+    }
+
+    if((!(abs(mousex) > abs(mousey) << 1)) && (abs(mousey) >= MJ_Threshold))
+    {
+      if(mousey < 0)
+        myDigitalPinState[One] = false;
+      else if(mousey > 0)
+        myDigitalPinState[Two] = false;
+    }
+  }
+  // Get mouse button state
+  if(myEvent.get(Event::MouseButtonValue))
+    myDigitalPinState[Six] = false;
 }
 
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