Add waiting screen for networking

data/gui/online/waiting_for_others.stkgui

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<stkgui>
+    <div x="2%" y="5%" width="96%" height="90%" layout="vertical-row" >
+
+        <header id="title" width="96%" height="fit" text_align="center" I18N="Networking screen" text="Waiting for the others..."/>
+
+        <spacer height="40" width="50"/>
+
+        Waiting...
+    </div>
+</stkgui>

src/states_screens/tracks_screen.cpp

@@ -33,6 +33,7 @@
 #include "states_screens/state_manager.hpp"
 #include "states_screens/track_info_screen.hpp"
 #include "states_screens/gp_info_screen.hpp"
+#include "states_screens/waiting_for_others.hpp"
 #include "tracks/track.hpp"
 #include "tracks/track_manager.hpp"
 #include "utils/translation.hpp"
@@ -96,7 +97,7 @@ void TracksScreen::eventCallback(Widget* widget, const std::string& name,
                 ClientLobbyRoomProtocol* clrp =
                               static_cast<ClientLobbyRoomProtocol*>(protocol);
                 clrp->voteTrack(selection);
-
+                WaitingForOthersScreen::getInstance()->push();
             }
             else
             {

src/states_screens/waiting_for_others.cpp

@@ -0,0 +1,60 @@
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2009-2015 Marianne Gagnon
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+#include "states_screens/waiting_for_others.hpp"
+
+#include "config/user_config.hpp"
+#include "guiengine/widget.hpp"
+#include "guiengine/widgets/list_widget.hpp"
+#include "guiengine/widgets/ribbon_widget.hpp"
+#include "input/device_manager.hpp"
+#include "input/input_manager.hpp"
+#include "input/keyboard_device.hpp"
+#include "karts/kart_properties_manager.hpp"
+#include "race/race_manager.hpp"
+#include "states_screens/state_manager.hpp"
+
+using namespace GUIEngine;
+
+DEFINE_SCREEN_SINGLETON( WaitingForOthersScreen );
+
+// -----------------------------------------------------------------------------
+
+WaitingForOthersScreen::WaitingForOthersScreen() : Screen("online/waiting_for_others.stkgui")
+{
+}   // WaitingForOthersScreen
+
+// -----------------------------------------------------------------------------
+
+void WaitingForOthersScreen::loadedFromFile()
+{
+}   // loadedFromFile
+
+// -----------------------------------------------------------------------------
+
+void WaitingForOthersScreen::eventCallback(Widget* widget, const std::string& name, const int playerID)
+{
+}   // eventCallback
+
+// -----------------------------------------------------------------------------
+
+void WaitingForOthersScreen::init()
+{
+    Screen::init();
+}   //init
+
+// -----------------------------------------------------------------------------

src/states_screens/waiting_for_others.hpp

@@ -0,0 +1,47 @@
+//  SuperTuxKart - a fun racing game with go-kart
+//  Copyright (C) 2009-2015 Marianne Gagnon
+//
+//  This program is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU General Public License
+//  as published by the Free Software Foundation; either version 3
+//  of the License, or (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+#ifndef HEADER_WAITING_FOR_OTHERS_HPP
+#define HEADER_WAITING_FOR_OTHERS_HPP
+
+#include "guiengine/screen.hpp"
+
+namespace GUIEngine { class Widget; }
+
+/**
+  * \brief Help screen, part 1
+  * \ingroup states_screens
+  */
+class WaitingForOthersScreen : public GUIEngine::Screen, public GUIEngine::ScreenSingleton<WaitingForOthersScreen>
+{
+    friend class GUIEngine::ScreenSingleton<WaitingForOthersScreen>;
+    WaitingForOthersScreen();
+
+public:
+
+    /** \brief implement callback from parent class GUIEngine::Screen */
+    virtual void loadedFromFile() OVERRIDE;
+
+    /** \brief implement callback from parent class GUIEngine::Screen */
+    virtual void eventCallback(GUIEngine::Widget* widget, const std::string& name,
+                               const int playerID) OVERRIDE;
+
+    /** \brief implement callback from parent class GUIEngine::Screen */
+    virtual void init() OVERRIDE;
+};
+
+#endif