/** @file
 * @author Edouard DUPIN
 * @copyright 2011, Edouard DUPIN, all right reserved
 * @license MPL v2.0 (see license file)
 */

#include <appl/widget/VolumeBar.hpp>

#include <ewol/widget/Manager.hpp>

const float dotRadius = 6.0f;

appl::widget::VolumeBar::VolumeBar() :
  signalChange(this, "change", ""),
  propertyValue(this, "value",
                      0.0f,
                      "Value of the VolumeBar",
                      &appl::widget::VolumeBar::onChangePropertyValue),
  propertyMinimum(this, "min",
                        -10.0f,
                        "Minimum value",
                        &appl::widget::VolumeBar::onChangePropertyMinimum),
  propertyMaximum(this, "max",
                        5.0f,
                        "Maximum value",
                        &appl::widget::VolumeBar::onChangePropertyMaximum) {
	addObjectType("appl::widget::VolumeBar");
	
	m_textColorFg = etk::color::orange;
	m_textColorLoaded = etk::color::red;
	m_textColorDone = etk::color::green;
	
	m_textColorBg = etk::color::black;
	m_textColorBg.setA(0x3F);
	
	propertyCanFocus.setDirectCheck(true);
	// Limit event at 1:
	setMouseLimit(1);
}

appl::widget::VolumeBar::~VolumeBar() {
	
}

void appl::widget::VolumeBar::calculateMinMaxSize() {
	vec2 minTmp = propertyMinSize->getPixel();
	m_minSize.setValue(std::max(minTmp.x(), 40.0f),
	                   std::max(minTmp.y(), dotRadius*2.0f) );
	markToRedraw();
}

void appl::widget::VolumeBar::onDraw() {
	m_draw.draw();
}

void appl::widget::VolumeBar::onRegenerateDisplay() {
	if (needRedraw() == false) {
		return;
	}
	// clean the object list ...
	m_draw.clear();
	m_draw.setColor(m_textColorFg);
	// draw a line:
	m_draw.setPos(vec3(dotRadius, 0.0f, 0.0f));
	m_draw.rectangleWidth(vec3(m_size.x(), m_size.y()-dotRadius*2.0f, 0.0f));
	// chaneg color whe soud became louder ...
	if (*propertyValue > 0.5f) {
		m_draw.setColor(m_textColorLoaded);
	} else {
		m_draw.setColor(m_textColorDone);
	}
	m_draw.setPos(vec3(m_size.x()*0.1f, dotRadius, 0.0f));
	
	float offset = (*propertyValue-*propertyMinimum)/(*propertyMaximum-*propertyMinimum);
	m_draw.rectangleWidth(vec3(m_size.x()*0.8f, offset*(m_size.y()-2.0f*dotRadius), 0.0f) );
	
}

bool appl::widget::VolumeBar::onEventInput(const ewol::event::Input& _event) {
	vec2 relativePos = relativePosition(_event.getPos());
	//EWOL_DEBUG("Event on VolumeBar ..." << _event);
	if (1 == _event.getId()) {
		if(    gale::key::status::pressSingle == _event.getStatus()
		    || gale::key::status::move   == _event.getStatus()) {
			// get the new position :
			EWOL_VERBOSE("Event on VolumeBar " << relativePos);
			float oldValue = *propertyValue;
			updateValue((float)(relativePos.y() - dotRadius) / (m_size.y()-2*dotRadius) * (*propertyMaximum-*propertyMinimum)+*propertyMinimum);
			if (oldValue != *propertyValue) {
				EWOL_VERBOSE(" new value : " << *propertyValue << " in [" << *propertyMinimum << ".." << *propertyMaximum << "]");
				signalChange.emit(*propertyValue);
			}
			return true;
		}
	}
	return false;
}

void appl::widget::VolumeBar::updateValue(float _newValue) {
	_newValue = std::max(std::min(_newValue, *propertyMaximum), *propertyMinimum);
	propertyValue.setDirect(_newValue);
	markToRedraw();
}


void appl::widget::VolumeBar::onChangePropertyValue() {
	updateValue(*propertyValue);
	return;
}

void appl::widget::VolumeBar::onChangePropertyMaximum() {
	updateValue(*propertyValue);
	return;
}

void appl::widget::VolumeBar::onChangePropertyMinimum() {
	updateValue(*propertyValue);
	return;
}