Add transparency for interactive messageboxes in game mode

apps/openmw/mwgui/messagebox.cpp

@@ -196,7 +196,7 @@ namespace MWGui
 
 
     InteractiveMessageBox::InteractiveMessageBox(MessageBoxManager& parMessageBoxManager, const std::string& message, const std::vector<std::string>& buttons)
-        : WindowModal("openmw_interactive_messagebox.layout")
+        : WindowModal(MWBase::Environment::get().getWindowManager()->isGuiMode() ? "openmw_interactive_messagebox_notransp.layout" : "openmw_interactive_messagebox.layout")
       , mMessageBoxManager(parMessageBoxManager)
       , mButtonPressed(-1)
     {

files/mygui/CMakeLists.txt

@@ -38,6 +38,7 @@ set(MYGUI_FILES
     openmw_hud.layout
     openmw_infobox.layout
     openmw_interactive_messagebox.layout
+    openmw_interactive_messagebox_notransp.layout
     openmw_inventory_window.layout
     openmw_journal.layout
     openmw_journal.skin.xml

files/mygui/openmw_interactive_messagebox_notransp.layout

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<MyGUI type="Layout">
+    <Widget type="Window" skin="MW_DialogNoTransp" layer="MessageBox" position="0 0 500 400" align="Center" name="_Main">
+        <Widget type="EditBox" skin="MW_TextEditClient" position="10 10 490 20" align="Left Top Stretch" name="message">
+            <Property key="FontName" value="Default"/>
+            <Property key="TextAlign" value="Center"/>
+            <Property key="Static" value="true"/>
+            <Property key="WordWrap" value="true"/>
+            <Property key="MultiLine" value="1"/>
+            <Property key="VisibleVScroll" value="1"/>
+        </Widget>
+        <Widget type="Widget" skin="" position="0 0 500 400" align="Stretch" name="buttons">
+        </Widget>
+    </Widget>
+</MyGUI>