ProgressBar.H

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#ifndef PROGRESSBAR_H
#define PROGRESSBAR_H


#include "IS3DCommon.H"
#include "DrawObj.H"

namespace IS3D {


// Functors allow for callback functions that are class methods
// in C++.  Google "C++ functors" for more information.
class ProgressCallbackFunctor
{
public:
  virtual ~ProgressCallbackFunctor() {}
  virtual float exec() = 0;
};

template <class T>
class ProgressCallbackSpecificFunctor : public ProgressCallbackFunctor
{
public:
  typedef float (T::*MethodType)();
  ProgressCallbackSpecificFunctor(T *obj, MethodType meth) {
    _obj = obj;
    _method = meth;
  }
  virtual ~ProgressCallbackSpecificFunctor() {}
  float exec() {
    return (_obj->*_method)();
  }
protected:
  T          *_obj;
  MethodType  _method;
};
// End functor bullshit



  

  
typedef ReferenceCountedPointer<class ProgressBar> ProgressBarRef;
class ProgressBar : public DrawObj
{
public:
  ProgressBar(const std::string &title);
  virtual ~ProgressBar();

  void  setValue(float v) { _value = v; }
  float getValue()        { return _value; }

  template <class T>
  void setProgressUpdateCallback(T *thisPtr, float (T::*method)()) {
    if (_callback != NULL)
      delete _callback;
    _callback = new ProgressCallbackSpecificFunctor<T>(thisPtr, method);
  }
  
  void draw();

private:
  ProgressCallbackFunctor *_callback;
  std::string _title;
  float       _value;
  GFontRef    _font;
  Color4      _outlineCol, _bgCol, _barCol, _titleCol, _percCol;
  Vector2     _pos;
  Vector2     _size;
};

} // end namespace

#endif

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