CWE-ou-minkata/Sources/Plasma/PubUtilLib/plProgressMgr/plProgressMgr.h

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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  plProgressMgr Header                                                    //
//                                                                          //
//// Description /////////////////////////////////////////////////////////////
//                                                                          //
//  The plProgressMgr is a method by which any part of the client can       //
//  display a progress bar indicating a lengthy operation.                  //
//  Basically, a function/class/whatnot registers an operation with the     //
//  plProgressMgr. 
//                                                                          //
//////////////////////////////////////////////////////////////////////////////

#ifndef _plProgressMgr_h
#define _plProgressMgr_h

#include "HeadSpin.h"


class plPipeline;
class plPlate;

//// plOperationProgress Definition //////////////////////////////////////////
//  The object you get back when you register a lengthy operation. Call this
//  to update your progress, destroy it when you're done.

class plProgressMgr;
class plOperationProgress
{
    friend class plProgressMgr;
    friend class plDTProgressMgr;

    protected:

        float    fValue, fMax;
        char        fStatusText[ 256 ];
        char        fTitle[ 256 ];
        uint32_t      fContext;
        double      fStartTime;

        uint32_t fElapsedSecs, fRemainingSecs;
        float fAmtPerSec;

        enum Flags
        {
            kShouldCancel   = 0x1,
            kInitUpdate     = 0x2,
            kFirstUpdate    = 0x4,
            kLastUpdate     = 0x8,
            kAborting       = 0x10,
            kRetry          = 0x20,
            kOverall        = 0x40,
            kAlwaysDrawText = 0x80,
        };
        uint8_t fFlags;

        plOperationProgress *fNext, *fBack;

        void IUpdateStats();

        // For overall progress bars
        void IChildUpdateBegin(plOperationProgress* child);
        void IChildUpdateEnd(plOperationProgress* child);

        plOperationProgress( float length );

    public:

        ~plOperationProgress();

        float GetMax( void ) const { return fMax; }
        float GetProgress( void ) const { return fValue; }
        const char * GetTitle( void ) const { return fTitle; }
        const char * GetStatusText( void ) const { return fStatusText; }
        uint32_t  GetContext( void ) const { return fContext; }
        uint32_t GetElapsedSecs() { return fElapsedSecs; }
        uint32_t GetRemainingSecs() { return fRemainingSecs; }
        float GetAmtPerSec() { return fAmtPerSec; }

        // Adds on to current value
        void    Increment( float byHowMuch );

        // Sets current value
        void    SetHowMuch( float byHowMuch );

        // Set the length
        void    SetLength( float length );

        // Sets the display text above the bar (nil for nothing)
        void    SetStatusText( const char *text );

        // Sets the title
        void    SetTitle( const char *title );

        // Application data
        void    SetContext( uint32_t context ) { fContext = context;}

        bool    IsDone( void ) { return ( fValue < fMax ) ? false : true; }

        // True if this is the initial update (progress was just created)
        bool IsInitUpdate() { return hsCheckBits(fFlags, kInitUpdate); }
        // True if this is the first time the progress was updated
        bool IsFirstUpdate() { return hsCheckBits(fFlags, kFirstUpdate); }
        // Returns true if this is the last update you'll get from this
        // operation (because it's getting deleted)
        bool IsLastUpdate() { return hsCheckBits(fFlags, kLastUpdate); }

        // This type of progress is just tracking the overall progress of it's children
        bool IsOverallProgress() { return hsCheckBits(fFlags, kOverall); }

        // Set if this progress is aborting before it completes.  This will let any overall
        // progress bars above this one know to adjust their totals to not include any amount
        // that wasn't completed, and will set this progress bar to zero
        void SetAborting();
        bool IsAborting() { return hsCheckBits(fFlags, kAborting); }
        // If you're reusing an existing progress bar to retry a failed operation, call this.
        // It will set the retry flag, and reset the progress bar so the next update will
        // count as the first.  If you set retry in RegisterOperation, don't use this too.
        void SetRetry();
        bool IsRetry() { return hsCheckBits(fFlags, kRetry); }

        // The progress manager can decide at any time to cancel your operation on you. Check this
        // value if you want to play nice and behave.
        bool ShouldCancel() const { return hsCheckBits(fFlags, kShouldCancel); }

        bool AlwaysDrawText() const { return hsCheckBits(fFlags, kAlwaysDrawText); }

        // Please ignore this and don't use it unless you're me :P
        plOperationProgress* GetPrev() const { return fBack; }
        plOperationProgress* GetNext() const { return fNext; }

        // Or this
        void    SetCancelFlag( bool f ) { hsChangeBits(fFlags, kShouldCancel, f); }
};

// This is a callback proc you set that gets called every time the progressManager
// needs updating (like, say, you need to redraw progress bars). The client generally
// sets this callback and nobody should ever touch it.
typedef void(*plProgressMgrCallbackProc)( plOperationProgress* );

//// Manager Class Definition ////////////////////////////////////////////////

class plProgressMgr
{
    friend class plOperationProgress;

    public:
        // this must match the order of the fStaticTextIDs array
        // for it to be useful
        enum StaticText
        {
            kNone,
            kUpdateText,
        };

    private:

        static plProgressMgr    *fManager;
        static char*            fImageRotation[];
        static const char*      fStaticTextIDs[];

    protected:

        plProgressMgr();

        plOperationProgress     *fOperations;

        plProgressMgrCallbackProc   fCallbackProc;

        StaticText  fCurrentStaticText;

        void IUpdateCallbackProc(plOperationProgress* progress);
        // For derived classes to use, so they don't have to set a callback proc
        virtual void IDerivedCallbackProc(plOperationProgress* progress) {}

        void IUpdateFlags(plOperationProgress* progress);

        plOperationProgress* IRegisterOperation(float length, const char *title, StaticText staticTextType, bool isRetry, bool isOverall, bool alwaysDrawText);
        // Called by the operation
        void IUnregisterOperation(plOperationProgress* op);

        virtual void Activate() {}
        virtual void Deactivate() {}

        static plProgressMgr    *IGetManager( void ) { return fManager; }

    public:

        virtual ~plProgressMgr();

        static plProgressMgr* GetInstance() { return fManager; }
        static char* GetLoadingFrameID(int index);
        static const char* GetStaticTextID(StaticText staticTextType);

        virtual void    Draw( plPipeline *p ) { }

        plOperationProgress* RegisterOperation(float length, const char *title = nil, StaticText staticTextType = kNone, bool isRetry = false, bool alwaysDrawText = false);
        plOperationProgress* RegisterOverallOperation(float length, const char *title = nil, StaticText staticTextType = kNone, bool alwaysDrawText = false);


        plProgressMgrCallbackProc SetCallbackProc( plProgressMgrCallbackProc proc );

        bool        IsActive( void ) const { return ( fOperations != nil ) ? true : false; }

        void    CancelAllOps( void );
};


#endif //_plProgressMgr_h