GUISystem.h

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#pragma once

#include "swCommonLib/Common/EngineObject.h"
#include "swGraphicAPI/Rendering/IGraphicAPIInitializer.h"
#include "swGUI/Native/INativeGUI.h"
#include "Events/EventsSystem.h"
#include "swGUI/Core/System/Rendering/RenderingSystem.h"

#include "HostWindow.h"

class ResourceManager;


namespace sw {
namespace gui
{


struct CommandLineArgs
{
    int             ArgsCount;
    char**          Arguments;


    CommandLineArgs( int argc, char** argv )
        : ArgsCount( argc )
        , Arguments( argv )
    { }

    const char*     ProgramName () { return Arguments[ 0 ]; }
};


class GUISystem
{
    friend class GUISystemTester;
private:

    static GUISystem*           m_instance;

protected:

    IGraphicAPIInitializer*     m_graphicApi;       
    INativeGUI*                 m_nativeGUI;        
    input::IInput*              m_input;            

    ResourceManager*            m_resourceManager;  
    RenderingSystemOPtr         m_renderingSystem;  

    std::vector< HostWindow* >  m_windows;
    HostWindow*                 m_focusedWindow;    

    CommandLineArgs             m_cmdArgs;

public:
    explicit        GUISystem       ( int argc, char** argv, INativeGUI* gui );
    virtual         ~GUISystem      ();

    Size            GetMemorySize   ();

    int             NumCommandLineArgs  ();
    const char*     CommandLineArg      ( int num );
    const char*     ProgramPath         ();

protected:
    virtual void    Initialize      ();
    virtual void    OnInitialized   () = 0;
    virtual void    OnClosing       () = 0;
    virtual void    OnIdle          () = 0;

    void            DefaultInitWithoutWindow    ();
    void            DefaultInit                 ( uint16 width, uint16 height, const std::string& windowTitle );
    bool            DefaultInitNativeGUI        ();
    bool            DefaultInitGraphicAPI       ();
    bool            DefaultInitRenderingSystem  ();

public:

    void            Init            ();
    int             MainLoop        ();
    bool            MainLoopCore    ();
    void            HandleEvents    ();

public:

    void            OnFocusChanged              ( INativeWindow* window, bool value );
    void            OnResized                   ( INativeWindow* window, uint16 newWidth, uint16 newHeight );
    void            OnMaximized                 ( INativeWindow* window );
    void            OnMinimized                 ( INativeWindow* window );

    HostWindow*     CreateNativeHostWindow      ( uint16 width, uint16 height, const std::string& windowTitle );
    HostWindow*     CreateNativeHostWindow      ( NativeWindowDescriptor& windowDesc );


public:
    static GUISystem&   Get             ();
};


}   // gui
}   // sw