#include "QtGDALProcessBar.h"
#include <QCoreApplication>


QtGDALProcessBar::QtGDALProcessBar(QWidget *parent)
	: QProgressBar(parent)
{
	//ui.setupUi(this);
	this->setTextVisible(true);
	m_dPosition = 0.0;
	m_iStepCount = 100;
	m_iCurStep = 0;
	

}

QtGDALProcessBar::~QtGDALProcessBar()
{
}

/**
* @brief 设置进度信息
* @param pszMsg			进度信息
*/
void QtGDALProcessBar::SetMessage(const char* pszMsg)
{
	if (pszMsg != NULL)
	{
		m_strMessage = pszMsg;
		//setLabelText(QString(pszMsg));
	}
}

/**
* @brief 设置进度值
* @param dPosition		进度值
*/
bool QtGDALProcessBar::SetPosition(double dPosition)
{
	m_dPosition = dPosition;
	//cout << "m_dPosition   " << m_dPosition << endl;
	//current_value = value();
	int temp_value = int(m_start_value +std::min(100u, (uint)(m_dPosition * 100.0 )) * m_scale);
	
	setValue(temp_value);
	//setFormat(tr("%1%").arg(temp_value));
	//cout << "StepIt   " << temp_value << "\t" << "current_value" << int(m_start_value + temp_value * m_scale) << endl;
	//QCoreApplication::instance()->processEvents();
	//this->update();
	//if (this->wasCanceled())
	//	return false;

	return true;
}

bool QtGDALProcessBar::SetStartEndValue(int i_start_value, int i_end_value)
{
	if (i_end_value< i_start_value )
	{
		return false;
	}
	else
	{
		m_start_value = i_start_value;
		m_end_value = i_end_value;
		m_scale = (m_end_value - m_start_value) / 100.0;
		return true;
	}
}

/**
* @brief 进度条前进一步,返回false表示终止操作
*/
bool QtGDALProcessBar::StepIt()
{
	m_iCurStep++;
	m_dPosition = m_iCurStep * 1.0 / m_iStepCount;
	//current_value = value();
	int temp_value = std::min(100u, (uint)(m_dPosition * 100.0));
	setValue(int(m_start_value + temp_value * m_scale));
	//setFormat(QString("当前进度为：%1%").arg(temp_value));
	//cout << "StepIt   " << temp_value <<"\t"<<"current_value"<< current_value << endl;

	//QCoreApplication::instance()->processEvents();

	//if (this->wasCanceled())
	//	return false;

	return true;
}

void QtGDALProcessBar::updateProgress(int step)
{
	this->setValue(step);
	//this->update();
	//cout << "updateProgress   " << step << endl;
	//QCoreApplication::instance()->processEvents();
}