#include <rgbFloat.h>
#include <algorithm>

using std::min;
using std::max;

RgbFloat::RgbFloat(int x, int y)
  : Fl_Group(x,y,100,100)
{
	int bw = w();
	int bh = h();
	int margen = 4;

	frame = new Fl_Box(x,y,w(),h());
	frame->box(FL_EMBOSSED_BOX);

	int vfx = x+2*margen + 40; 
	int vfy = y+2*margen; 
	int vfw = 50;
	int vfh = 28;
	int sepVert = 30; 

	vfRed = new Fl_Value_Input(vfx, vfy, vfw, vfh, "R real");
	vfRed->maximum   (1.0f);
	vfRed->step      (1.0f/256.0f);
	vfRed->labelcolor(FL_RED);
	vfRed->callback(cambioCB,(long)FL_RED);

	vfGreen = new Fl_Value_Input(vfx, vfy+sepVert, vfw, vfh, "G real");
	vfGreen->maximum(1.0f);
	vfGreen->step(1.0f/256.0f);
	vfGreen->labelcolor(FL_GREEN);
	vfGreen->callback(cambioCB,(long)FL_GREEN);

	vfBlue = new Fl_Value_Input(vfx, vfy+2*sepVert, vfw, vfh, "B real");
	vfBlue->maximum(1.0f);
	vfBlue->step(1.0f/256.0f);
	vfBlue->labelcolor(FL_BLUE);
	vfBlue->callback(cambioCB,(long)FL_BLUE);

	end(); // importante!!

}

void RgbFloat::getRGB(uchar &r, uchar &g, uchar &b) 
{ 
  r = (uchar)(vfRed->value()*255.0); 
  g = (uchar)(vfGreen->value()*255.0); 
  b = (uchar)(vfBlue->value()*255.0); 
}

void RgbFloat::_setRGB(int r, int g, int b)
{
  vfRed->value(r/255.0);
  vfGreen->value(g/255.0);
  vfBlue->value(b/255.0);
}

void RgbFloat::setRGB(int r, int g, int b)
{

}

void RgbFloat::cambioCB(Fl_Widget *w, long color)
{
  static uchar r, g, b;
  const static double MIN = 0.0;
  const static double MAX = 255.0;

  RgbFloat *rgbFloat = (RgbFloat *)w->parent();
  rgbFloat->getRGB(r,g,b);
	
  Fl_Value_Input *vi = (Fl_Value_Input *)w;
  double val = max(MIN, min(vi->value()*255.0, MAX));

  switch (color)
  { 
  case FL_RED: r = (uchar) val; break;
  case FL_GREEN: g = (uchar) val; break;
  case FL_BLUE: b = (uchar) val; break;
  }
  
}