/*
   ui/colorpicker.cc
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#include "ui/bitmap.h"
#include "ui/colorpicker.h"
#include "ui/slider.h"
#include "ui/label.h"
#include "ui/ui.h"

#include "math/functions.h"

namespace ui 
{
	
ColorPicker::ColorPicker(Widget *parent) : Widget(parent)
{
	set_label("colorpicker");
	
	_label_red = new Label(this, "R");
	_label_red->set_alignment(AlignLeft | AlignVCenter);
	_label_red->set_border(false);
	_label_red->set_background(false);
	_slider_red = new Slider(this, 0.0f, 255.0f);
	
	_label_green = new Label(this, "G");
	_label_green->set_alignment(AlignLeft | AlignVCenter);
	_label_green->set_border(false);
	_label_green->set_background(false);
	_slider_green = new Slider(this, 0.0f, 255.0f);
	
	_label_blue = new Label(this, "B");
	_label_blue->set_alignment(AlignLeft | AlignVCenter);
	_label_blue->set_border(false);
	_label_blue->set_background(false);
	_slider_blue = new Slider(this, 0.0f, 255.0f);
	
	_color_preview = new Bitmap(this);
	_color_preview->set_label("preview");
	_color_preview->set_border(true);

	color_changed();
}

ColorPicker::~ColorPicker()
{
}

void ColorPicker::set_color(const math::Color & color)
{
	_color.assign(color);
	color_changed();
}
	
void ColorPicker::set_color(const float r, const float g, const float b)
{
	_color.assign(r, g, b);
	color_changed();
}

void ColorPicker::color_changed()
{
	_slider_red->set_value(_color.red() * 255.0f);
	_slider_green->set_value(_color.green() * 255.0f);
	_slider_blue->set_value(_color.blue() * 255.0f);
	_color_preview->set_color(_color);
}

void ColorPicker::resize()
{
	const float margin = UI::margin;
	const float w = font()->width() * 3.0f;
	const float h = (height() - margin * 4.0f) / 3.0f;
	
	const float r = math::min(width(), height()) - 2.0f * margin;
	
	// resize color preview
	_color_preview->set_size(r,r);
	_color_preview->set_location(width() - r - margin, height() - r - margin);
	
	// resize red channel label
	_label_red->set_size(w, h);
	_label_red->set_location(margin, margin);
	// resize red channel slider
	_slider_red->set_location(_label_red->right(), _label_red->top());
	_slider_red->set_size(_color_preview->left() - _label_red->right() - 2.0f * margin, h);
	
	_label_green->set_size(w, h);
	_label_green->set_location(margin, 2.0f * margin + h);
	// resize green channel slider
	_slider_green->set_location(_label_green->right(), _label_green->top());
	_slider_green->set_size(_color_preview->left() - _label_green->right() - 2.0f * margin, h);
	
	_label_blue->set_size(w, h);
	_label_blue->set_location(margin, 3.0f * margin + 2.0f * h);
	// resize blue channel slider
	_slider_blue->set_location(_label_blue->right(), _label_blue->top());
	_slider_blue->set_size(_color_preview->left() - _label_blue->right() - 2.0f * margin, h);
}

bool ColorPicker::on_emit(Widget *sender, const Event event, void *data)
{
	if (event == ui::Widget::EventSliderChanged)
	{
		if (sender == _slider_red)
		{
			_color[0] = _slider_red->value() / 255.0f;
			_color_preview->set_color(_color);
			return true;
		}
		else if (sender == _slider_green)
		{
			_color[1] = _slider_green->value() / 255.0f;
			_color_preview->set_color(_color);
			return true;
		}
		else if (sender == _slider_blue)
		{
			_color[2] = _slider_blue->value() / 255.0f;
			_color_preview->set_color(_color);
			return true;
		}	
	}
	
	// unhandled event
	return false;
}

}