src/GUIAlphaElement.cpp

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#include "glwx.h"

GUIAlphaElement::GUIAlphaElement(const std::string &callback) :  GUIRectangle(callback)
{
  setColor(225.0f, 225.0f, 225.0f);
  alphaFadeScale =     1.0f;
  minAlpha       =     0.6f;
  color.w        = minAlpha;
}

bool GUIAlphaElement::loadXMLSettings(const TiXmlElement *element)
{
  if(!element)
    return false;

  setAlphaFadeScale(XMLArbiter::fillComponents1f(element, "alphaFadeScale", alphaFadeScale));
  setMinAlpha(XMLArbiter::fillComponents1f(element, "minAlpha", minAlpha));

  for(const TiXmlElement *child = element->FirstChildElement(); 
      child;
          child = child->NextSiblingElement() )
  {
    const char * value = child->Value();

    if(value)
    {
      if(!strcmp(value, "Color"))
        XMLArbiter::fillComponents4f(child, color);
 
      if(!strcmp(value, "Text"))
        label.loadXMLSettings(child);
    }
  }

  setColor(color.x, color.y, color.z);
  return   GUIRectangle::loadXMLSettings(element);
}

void  GUIAlphaElement::setColor(const Tuple3f& color)
{
  setColor(color.x, color.y, color.z);
}

void GUIAlphaElement::setColor(float r, float g, float b)
{
  color.set(clamp(r, 0.0f, 255.0f),
            clamp(g, 0.0f, 255.0f),
            clamp(b, 0.0f, 255.0f),
            clamp(color.w, 0.0f, 1.0f));

  color.x /= (color.x > 1.0) ? 255.0f : 1.0f;
  color.y /= (color.y > 1.0) ? 255.0f : 1.0f;
  color.z /= (color.z > 1.0) ? 255.0f : 1.0f;
}

const Tuple4f &GUIAlphaElement::getColor()
{
  return color;
}

void  GUIAlphaElement::setLabelString(const std::string &labelArg)
{
  label = labelArg;
}

GUIText * GUIAlphaElement::getLabel()
{
  return &label;
}

const std::string &GUIAlphaElement::getLabelString()
{
  return label.getString();
}

void  GUIAlphaElement::setAlpha(float alphaArg)
{
  color.w = clamp(alphaArg, minAlpha, 1.0f);
}

float GUIAlphaElement::getAlpha()
{
  return color.w;
}

void  GUIAlphaElement::setAlphaFadeScale(float duration)
{
  alphaFadeScale = clamp(duration, 0.0f, 10.0f);
}

float GUIAlphaElement::getAlphaFadeScale()
{
  return alphaFadeScale;
}

void  GUIAlphaElement::setMinAlpha(float minAlphaArg)
{
  minAlpha = clamp(minAlphaArg, 0.2f, 1.0f);
}

float GUIAlphaElement::getMinAlpha()
{
  return minAlpha;
}

void GUIAlphaElement::modifyCurrentAlpha(float clockTick)
{
  if(!mouseOver && !pressed)
    setAlpha(color.w - clockTick * alphaFadeScale);
  else
    setAlpha(color.w + clockTick * alphaFadeScale);
}

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