// $Id: TringuCam.h 2363 2010-04-06 20:49:16Z matevz $

// Copyright (C) 1999-2008, Matevz Tadel. All rights reserved.
// This file is part of GLED, released under GNU General Public License version 2.
// For the licensing terms see $GLEDSYS/LICENSE or http://www.gnu.org/.

#ifndef Var1_TringuCam_H
#define Var1_TringuCam_H

#include <Glasses/ZNode.h>
#include <Glasses/Tringula.h>
#include <Stones/TimeMakerClient.h>
#include <Gled/GTime.h>

#include <RnrBase/A_Rnr.h>
#include <Opcode/Opcode.h>

class WSTube;
class ScreenText;
class WGlWidget;

class TringuRep;
class TSPupilInfo;

class Eventor;
class TimeMaker;

class TringuCam : public ZNode,
		  public TimeMakerClient
{
  MAC_RNR_FRIENDS(TringuCam);

protected:
  //=================================================================
  // Top-level-stuff
  //=================================================================

  Bool_t        bKeysVerbose;  // X{GS} 7 Bool(-join=>1)
  Bool_t        bMouseVerbose; // X{GS} 7 Bool()

  //=================================================================
  // Key-handling stuff.
  //=================================================================

public:

  struct ValueInfo;

  struct KeyInfo
  {
    ValueInfo* fValueInfo;
    Bool_t     fIsInc;

    Bool_t  fIsDown;
    Float_t fDesiredValue; // Always positive.
    Float_t fDecayTimeout;

    KeyInfo(ValueInfo* val_info, Bool_t is_inc) :
      fValueInfo(val_info), fIsInc(is_inc),
      fIsDown(false), fDesiredValue(0), fDecayTimeout(0) {}
  };

  struct KeyValueChangeParams
  {
    Float_t fValueAccel;
    Float_t fValueAccelDeltaFactor;
    Float_t fValueDecay;
    Float_t fValueDecayDeltaFactor;
    Float_t fValueDecayTimeout;

    Float_t fDesireIncStep;
    Float_t fDesireIncDeltaFactor; // This should really link to number of keydowns / pressure if had key-velocity info
    Float_t fDesireDecay;
    Float_t fDesireDecayDeltaFactor;
    Float_t fDesireDecayTimeout;

    void SetValueParams(Float_t acc,   Float_t acc_df,
                        Float_t decay, Float_t decay_df,
                        Float_t decay_to)
    {
      fValueAccel = acc;   fValueAccelDeltaFactor = acc_df;
      fValueDecay = decay; fValueDecayDeltaFactor = decay_df;
      fValueDecayTimeout = decay_to;
    }
    void SetDesireParams(Float_t inc_step, Float_t inc_df,
                         Float_t decay,    Float_t decay_df,
                         Float_t decay_to)
    {
      fDesireIncStep = inc_step; fDesireIncDeltaFactor   = inc_df;
      fDesireDecay   = decay;    fDesireDecayDeltaFactor = decay_df;
      fDesireDecayTimeout = decay_to;
    }
  };

  struct ValueInfo
  {
    KeyValueChangeParams* fChangeParams;

    Float_t fValue;
    Float_t fMinValue, fMaxValue;
    Float_t fDecayTimeout;
    KeyInfo fIncKey;
    KeyInfo fDecKey;
    Bool_t  fSustain;
    Bool_t  fSustainSet;
    Float_t fSustainDesire;

    ValueInfo(KeyValueChangeParams* chg_prm=0) :
      fChangeParams(chg_prm),
      fValue(0), fDecayTimeout(0),
      fIncKey(this, true), fDecKey(this, false),
      fSustain(false), fSustainDesire(0)
    {}

    void SetMinMax(Float_t min, Float_t max) { fMinValue = min; fMaxValue = max; }

    void IncValue(Float_t& value, Float_t desire, Float_t step, Float_t delta_fac);
    void DecValue(Float_t& value, Float_t desire, Float_t step, Float_t delta_fac);

    void DecayValue(Float_t& value, Float_t decay, Float_t delta_fac=0);

    void DecayTimeoutOrValue(Float_t& timeout, Float_t& value, Float_t dt,
                             Float_t decay, Float_t delta_fac);

    void ApproachValue(Float_t& value, Float_t desire,
		       Float_t inc_step, Float_t inc_delta_fac,
		       Float_t dec_step, Float_t dec_delta_fac);

    void TimeTick(Float_t dt);
  };

private:
  void _init();

protected:
  KeyValueChangeParams mChgParCameraMove;
  KeyValueChangeParams mChgParCameraRotate;

  ValueInfo mFwdBck;
  ValueInfo mLftRgt;
  ValueInfo mUpDown;

  ValueInfo mSpinUp; // Spin about parent's up axis

  map<Int_t, KeyInfo*> mKeyStateMap;

  ZLink<ScreenText>  mInfoTxt;   // X{GS} L{}


  //=================================================================
  // Mouse-handling stuff.
  //=================================================================

public:
  // On mouse-1 we do:
  enum MouseAction_e { MA_Nothing, MA_RayCollide, MA_AddField, MA_SprayField,
                       MA_AddSource,
                       MA_PickExtendios,
		       MA_NewLandMark
  };

  enum ExpectBeta_e { EB_Nothing, EB_ConnectStaticos };

protected:
  MouseAction_e mMouseAction;   // X{GS} 7 PhonyEnum()
  MouseAction_e mPrevAction;    //!
  ExpectBeta_e  mExpectBeta;    // X{G}  7 PhonyEnum(-const=>1)
  Float_t       mRayLength;     // X{GS} 7 Value(-range=>[   0, 1000, 1,100])

  Bool_t        bMouseDown;

  //=================================================================
  // Other stuff.
  //=================================================================

  ZLink<Tringula>          mTringula;    // X{GS} L{a}

  ZLink<TringuRep>         mTringuRep;   // X{GS} L{a}

  ZLink<TSPupilInfo>       mPupilInfo;   // X{GS} L{a}

  ZLink<Eventor>           mEventor;     // X{GS} L{a}
  ZLink<TimeMaker>         mTimeMaker;   // X{GS} L{a}

  ZLink<ZGlass>            mPrepBeta;    // X{GS} L{a}

  Int_t     mStampInterval;     //  X{GS} 7 Value(-range=>[0,1000])
  Int_t     mStampCount;        //!
  Double_t  mHeight;            //  Height above tringula. X{GS} 7 Value(-range=>[-1e5, 1e5, 1, 100])

  ZPoint    mMouseRayPos;
  ZPoint    mMouseRayDir;

  Opcode::RayCollider    mRayColl;    //!
  Opcode::CollisionFaces mCollFaces;  //!
  Opcode::CollisionFace  mCollFace;   //!
  Opcode::Point          mCollPoint;  //!
  Int_t                  mCollVertex; //! Closest vertex, -1 if no collision.

  TString                mGradName;   //! Current gradient for connect - hack.

  WSTube* make_tube(Statico* stato0, Statico* stato1, const TString& grad_name);

public:
  TringuCam(const Text_t* n="TringuCam", const Text_t* t=0) :
    ZNode(n,t) { _init(); }

  KeyInfo* FindKeyInfo(Int_t key);
  Int_t KeyDown(Int_t key);
  Int_t KeyUp(Int_t key);

  void MouseDown(A_Rnr::Fl_Event& ev);
  void MouseUp();

  void CalculateMouseRayVectors();
  void MouseRayCollide();

  void AddField(Float_t val);

  // TimeMakerClient
  virtual void TimeTick(Double_t t, Double_t dt);

  // Overlay methods

  void ExtendioDetails(Extendio* ext); // X{E} C{1} 7 MCWButt()
  void ExtendioExplode(Extendio* ext); // X{E} C{1} 7 MCWButt()

  void PrepConnectStatos(Statico* stato, Int_t id, const TString& grad); // X{E} C{1} 7 MCWButt()

  void Suspend(); // X{E}
  void Resume();  // X{E}

  void Help(); // X{E}

  // --- Test Menu Functions ---

  void RandomStatico(); // X{E}
  void MakeLandMark();  // X{E}

#include "TringuCam.h7"
  ClassDef(TringuCam, 1);
}; // endclass TringuCam

#endif