#include "opcv/CvGraphicsViewWidget.h"

#include <QThread>

CvGraphicsViewWidget::CvGraphicsViewWidget(QWidget* parent)
	:QGraphicsView(parent)
{
	if (parent != Q_NULLPTR)
		this->setParent(parent);
	this->setStyleSheet("QGraphicsView{"
		"background-color:transparent;"
		"border:none;"
		"}");
	mGraphicsScene = new QGraphicsScene();

	setMouseTracking(true);//跟踪鼠标位置
	setDragMode(QGraphicsView::NoDrag);
	setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
	setResizeAnchor(QGraphicsView::AnchorUnderMouse);

}

void CvGraphicsViewWidget::showImage(cv::Mat const& _cvimg)
{
	QThread* thread =new QThread();
	qDebug() << "CvGraphicsViewWidget::showImage thread:"<<thread->currentThreadId();

	if (_cvimg.empty())
		return;
	//QImage toShow;
	QPixmap pixmap;

	CvImage2QPixmap(_cvimg, pixmap);

	//QPixmap pixmap = QPixmap::fromImage(toShow);
	mGraphicsScene->clear();
	mGraphicsScene->addPixmap(pixmap);

	setScene(mGraphicsScene);
}

//void CvGraphicsViewWidget::paintEvent(QPaintEvent* event)
//{
//	QGraphicsView::paintEvent(event);
//}

void CvGraphicsViewWidget::CvImage2QPixmap(cv::Mat const& fromCv, QPixmap& toPix)
{
	const uchar* pSrc = (const uchar*)fromCv.data;
	QImage image;
	if (fromCv.type() == CV_8UC1)
	{
		qDebug() << "CV_8UC1";
		image = QImage(pSrc, fromCv.cols, fromCv.rows, fromCv.step, QImage::Format_Grayscale8);
	}
	else if (fromCv.type() == CV_8UC3)
	{
		qDebug() << "CV_8UC3";
		image = QImage(pSrc, fromCv.cols, fromCv.rows, fromCv.step, QImage::Format_RGB888);
	}
	else if (fromCv.type() == CV_8UC4)
	{
		qDebug() << "CV_8UC4";
		image = QImage(pSrc, fromCv.cols, fromCv.rows, fromCv.step, QImage::Format_ARGB32);
	}
	else
	{
		qDebug() << "ERROR: Mat could not be converted to QImage.";
		return;
	}
	toPix = QPixmap::fromImage(image);
}

bool CvGraphicsViewWidget::QImage2CvImage(QImage& fromQ, cv::Mat& toCv)
{

	return false;
}

//void CvGraphicsViewWidget::wheelEvent(QWheelEvent* ev)
//{
//	qreal qrTmp = 1.0;
//	if (ev->delta() > 0)
//	{
//		qrTmp = 1.2;
//		this->scale(qrTmp, qrTmp);
//	}
//	else
//	{
//		qrTmp = 1.0 / 1.2;
//		this->scale(qrTmp, qrTmp);
//	}
//	mScaledFactor *= qrTmp;  //保存放大倍数
//}