add ability to check if a window is on the stack (to see if we're in the main menu)

apps/openmw/mwbase/windowmanager.hpp

@@ -88,6 +88,7 @@ namespace MWBase
             ///< can be anywhere in the stack
 
             virtual MWGui::GuiMode getMode() const = 0;
+            virtual bool containsMode(MWGui::GuiMode) const = 0;
 
             virtual bool isGuiMode() const = 0;
 

apps/openmw/mwgui/windowmanagerimp.cpp

@@ -965,6 +965,14 @@ MWGui::GuiMode WindowManager::getMode() const
     return mGuiModes.back();
 }
 
+bool WindowManager::containsMode(GuiMode mode) const
+{
+    if(mGuiModes.empty())
+        return false;
+
+    return std::find(mGuiModes.begin(), mGuiModes.end(), mode) != mGuiModes.end();
+}
+
 std::map<int, MWMechanics::Stat<float> > WindowManager::getPlayerSkillValues()
 {
     return mPlayerSkillValues;

apps/openmw/mwgui/windowmanagerimp.hpp

@@ -97,6 +97,7 @@ namespace MWGui
     virtual void removeGuiMode(GuiMode mode); ///< can be anywhere in the stack
 
     virtual GuiMode getMode() const;
+    virtual bool containsMode(GuiMode mode) const;
 
     virtual bool isGuiMode() const;