update ui after savestate load (because loading a savestate can affect whether certain items should be grayed out in the menu)

Source/Core/Core/Src/State.cpp

@@ -61,6 +61,8 @@ static int ev_FileSave, ev_BufferSave, ev_FileLoad, ev_BufferLoad, ev_FileVerify
 
 static std::string g_current_filename, g_last_filename;
 
+static CallbackFunc g_onAfterLoadCb = NULL;
+
 // Temporary undo state buffer
 static std::vector<u8> g_undo_load_buffer;
 static std::vector<u8> g_current_buffer;
@@ -406,12 +408,20 @@ void LoadFileStateCallback(u64 userdata, int cyclesLate)
 
 	g_op_in_progress = false;
 
+	if (g_onAfterLoadCb)
+		g_onAfterLoadCb();
+
 	g_loadDepth--;
 
 	// resume dat core
 	CCPU::EnableStepping(false);
 }
 
+void SetOnAfterLoadCallback(CallbackFunc callback)
+{
+	g_onAfterLoadCb = callback;
+}
+
 void VerifyFileStateCallback(u64 userdata, int cyclesLate)
 {
 	Flush();

Source/Core/Core/Src/State.h

@@ -56,6 +56,10 @@ void UndoLoadState();
 
 void Flush(); // wait until previously scheduled savestate event (if any) is done
 
+// for calling back into UI code without introducing a dependency on it in core
+typedef void(*CallbackFunc)(void);
+void SetOnAfterLoadCallback(CallbackFunc callback);
+
 }
 
 #endif

Source/Core/DolphinWX/Src/Frame.cpp

@@ -410,6 +410,8 @@ CFrame::CFrame(wxFrame* parent,
 	g_TASInputDlg = new TASInputDlg(this);
 	Movie::SetInputManip(TASManipFunction);
 
+	State::SetOnAfterLoadCallback(OnAfterLoadCallback);
+
 	// Setup perspectives
 	if (g_pCodeWindow)
 	{
@@ -859,6 +861,12 @@ int GetCmdForHotkey(unsigned int key)
 	return -1;
 }
 
+void OnAfterLoadCallback()
+{
+	if(main_frame)
+		main_frame->UpdateGUI();
+}
+
 void TASManipFunction(SPADStatus *PadStatus, int controllerID)
 {
 	if (main_frame)

Source/Core/DolphinWX/Src/Frame.h

@@ -361,6 +361,8 @@ private:
 
 int GetCmdForHotkey(unsigned int key);
 
+void OnAfterLoadCallback();
+
 // For TASInputDlg
 void TASManipFunction(SPADStatus *PadStatus, int controllerID);