#include "ZoomManager.h"

#include "ZoomWidget.h"
#include "utils/ImageUtils.h"

ZoomWidget::ZoomWidget(std::string	name, 
	float		w,			
	float		h,			
	std::string		fileName,	
	std::string		message,    
	osgWidget::Widget::Layer layer,
	ZoomManager *pZoomManager)
	:osgWidget::Widget(name, w, h)
{
	//osg::Image *image = ImageUtils::readImage(fileName);
	setImage(fileName, true, true);
	setTexCoord(0.0f, 0.0f, osgWidget::Widget::LOWER_LEFT);
	setTexCoord(1.0f, 0.0f, osgWidget::Widget::LOWER_RIGHT);
	setTexCoord(1.0f, 1.0f, osgWidget::Widget::UPPER_RIGHT);
	setTexCoord(0.0f, 1.0f, osgWidget::Widget::UPPER_LEFT);
	setLayer(layer);
	setEventMask(osgWidget::EVENT_MOUSE_PUSH | osgWidget::EVENT_MOUSE_RELEASE | osgWidget::EVENT_MOUSE_DRAG);
	setColor(1, 1, 1, 0);


	_pointX = _pointY = 0.0;
	_order = message;
	_pZoomManager = pZoomManager;
}

ZoomWidget::~ZoomWidget(void)
{
}

bool ZoomWidget::mousePush(double x, double y, const  osgWidget::WindowManager* wm)
{
	_pZoomManager->state = ZoomManager::MOUSE_PUSH;
	_pointY = y;
	_pointX = x;
	if ("lessen" == _order)
	{
		_pZoomManager->zoom = -43;
	}
	else if ("enlargement" == _order)
	{
		_pZoomManager->zoom = 43;
	}
	setColor(1, 1, 1, 1);
	return false;
}

bool ZoomWidget::mouseRelease(double x, double y, const osgWidget::WindowManager* wm)
{
	_pZoomManager->state = ZoomManager::MOUSE_RELEASE;

	if ("bar" == _order)
	{
		setOrigin(0, 67);
		getParent()->getByName("bar_")->setOrigin(0, 66);
		getParent()->resize();
	}
	_pZoomManager->zoom = 0.0;
	setColor(1, 1, 1, 0);
	return false;
}

bool ZoomWidget::mouseDrag(double x, double y, const  osgWidget::WindowManager* wm)
{
	if (_order == "bar")
	{
		_pointX += x;
		_pointY += y;

		while (_pZoomManager->zoom > 43)
			_pZoomManager->zoom = 43;
		while (_pZoomManager->zoom < -43)
			_pZoomManager->zoom = -43;

		if (y > 43 - _pZoomManager->zoom)
		{
			y = 43 - _pZoomManager->zoom;
		}
		if (y < -43 - _pZoomManager->zoom)
		{
			y = -43 - _pZoomManager->zoom;
		}

		if (_pZoomManager->zoom >= -43 && _pZoomManager->zoom <= 43)
		{
			addOrigin(0, y);
			getParent()->getByName("bar_")->addOrigin(0, y);
			_pZoomManager->zoom += y;
		}
		else {
			_pZoomManager->zoom += y;
		}
		getParent()->resize();
	}
	return true;
}