added GetButtonPressed function

apps/openmw/mwscript/docs/vmformat.txt

@@ -108,4 +108,5 @@ op 0x2000133: Journal
 op 0x2000134: SetJournalIndex
 op 0x2000135: GetJournalIndex
 op 0x2000136: GetPCCell
-opcodes 0x2000137-0x3ffffff unused
+op 0x2000137: GetButtonPressed
+opcodes 0x2000138-0x3ffffff unused

apps/openmw/mwscript/guiextensions.cpp

@@ -52,6 +52,21 @@ namespace MWScript
                 }
         };
 
+        class OpGetButtonPressed : public Interpreter::Opcode0
+        {
+            public:
+
+                virtual void execute (Interpreter::Runtime& runtime)
+                {
+                    InterpreterContext& context =
+                        static_cast<InterpreterContext&> (runtime.getContext());
+
+                    MWWorld::Ptr ptr = context.getReference();
+
+                    runtime.push (context.getWindowManager().readPressedButton());
+                }
+        };
+
         const int opcodeEnableBirthMenu = 0x200000e;
         const int opcodeEnableClassMenu = 0x200000f;
         const int opcodeEnableNameMenu = 0x2000010;
@@ -63,6 +78,7 @@ namespace MWScript
         const int opcodeEnableStatsMenu = 0x2000016;
         const int opcodeEnableRest = 0x2000017;
         const int opcodeShowRestMenu = 0x2000018;
+        const int opcodeGetButtonPressed = 0x2000137;
 
         void registerExtensions (Compiler::Extensions& extensions)
         {
@@ -82,6 +98,8 @@ namespace MWScript
             extensions.registerInstruction ("enablelevelupmenu", "", opcodeEnableRest);
 
             extensions.registerInstruction ("showrestmenu", "", opcodeShowRestMenu);
+
+            extensions.registerFunction ("getbuttonpressed", 'l', "", opcodeGetButtonPressed);
         }
 
         void installOpcodes (Interpreter::Interpreter& interpreter)
@@ -115,6 +133,8 @@ namespace MWScript
 
             interpreter.installSegment5 (opcodeShowRestMenu,
                 new OpShowDialogue (MWGui::GM_Rest));
+
+            interpreter.installSegment5 (opcodeGetButtonPressed, new OpGetButtonPressed);
         }
     }
 }