GLWWindowManager.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D 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 Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#if !defined(__INCLUDE_GLWWindowManagerh_INCLUDE__)
#define __INCLUDE_GLWWindowManagerh_INCLUDE__

#include <map>
#include <deque>
#include <engine/GameStateI.h>
#include <common/KeyboardKey.h>
#include <GLW/GLWWindow.h>
#include <GLEXT/GLMenuI.h>

class GLWWindowManager : 
        public GameStateI,
        public GLMenuI
{
public:
        static GLWWindowManager *instance();

        void addWindow(const unsigned state, GLWWindow *window, 
                KeyboardKey *key = 0, bool visible = false);
        bool showWindow(unsigned id);
        bool hideWindow(unsigned id);
        bool windowVisible(unsigned id);
        bool moveToFront(unsigned id);
        bool windowInCurrentState(unsigned id);
        void sortWindowLevels();
        unsigned int getFocus(int x, int y);

        void loadPositions();
        void savePositions();
        void clear();

        GLWWindow *getWindowByName(const char *name);

        // All inherited from GameStateI
        virtual void enterState(const unsigned state);
        virtual void draw(const unsigned state);
        virtual void simulate(const unsigned state, float simTime);
        virtual void keyboardCheck(const unsigned state, float frameTime, 
                                                           char *buffer, unsigned int keyState,
                                                           KeyboardHistory::HistoryElement *history, int hisCount, 
                                                           bool &skipRest);
        virtual void mouseDown(const unsigned state, GameState::MouseButton button, 
                int x, int y, bool &skipRest);
        virtual void mouseUp(const unsigned state, GameState::MouseButton button, 
                int x, int y, bool &skipRest);
        virtual void mouseDrag(const unsigned state, GameState::MouseButton button, 
                int x, int y, int dx, int dy, bool &skipRest);
        virtual void mouseWheel(const unsigned state, 
                int x, int y, int z, bool &skipRest);

        // Inherited from GLMenuI
        virtual bool getMenuItems(const char* menuName, 
                std::list<GLMenuItem> &result);
        virtual void menuSelection(const char* menuName, 
                const int position, GLMenuItem &item);

protected:
        static GLWWindowManager *instance_;

        // The collection that determines a windows visibility
        std::map<unsigned, bool> windowVisibility_;
        std::map<unsigned, GLWWindow *> idToWindow_;

        // The deque of windows in each state
        struct StateEntry
        {
                unsigned state_;
                std::list<std::pair<KeyboardKey *, GLWWindow *> > windowKeys_;
                std::deque<GLWWindow *> windows_;
        };
        // The collection of states
        std::map<unsigned, StateEntry> stateEntrys_;
        StateEntry *currentStateEntry_;

        // To check for re-entrancy
        unsigned int changeEpoc_;

        void setCurrentEntry(const unsigned state);

private:
        GLWWindowManager();
        virtual ~GLWWindowManager();

};

#endif

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