#include "houghdialog.h"
#include "ui_houghdialog.h"

HoughDialog::HoughDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::HoughDialog)
{
    ui->setupUi(this);
}

HoughDialog::~HoughDialog()
{
    delete ui;
}

void HoughDialog::on_pushButton_clicked()
{
    flush();
}

void HoughDialog::receiveImage(Mat in){
    src=in.clone();
    flush();
}

void HoughDialog::flush(){
    Mat gray_src;
    dst=src.clone();
    cvtColor(src,gray_src,CV_BGR2GRAY);//转化为灰度图
    int lowThreshold = ui->CannyLE->text().toInt();
    int houghThreshold = ui->HoughLE->text().toInt();
    int minLength = ui->lengthLE->text().toInt();
    int maxDistanse = ui->disLE->text().toInt();
    Canny(gray_src, gray_src, lowThreshold, lowThreshold*3, 3);//cannny区域分割
    vector<Vec4f> lines;
    HoughLinesP(gray_src,lines,1,CV_PI/180,houghThreshold,minLength,maxDistanse);//霍夫变换
    for (size_t i = 0; i < lines.size(); i++)//将检测到的直线进行绘制
    {
        Vec4f point1 = lines[i];
        line(dst, Point(point1[0], point1[1]), Point(point1[2], point1[3]), Scalar(255, 255, 0), 2, LINE_AA);
    }
    Mat dstShow=dst.clone();
    cvtColor(dstShow,dstShow,CV_BGR2RGB);
    QImage img = QImage((const unsigned char*)(dstShow.data),dstShow.cols,dstShow.rows,dstShow.step,QImage::Format_RGB888);
    ui->graphicsView->resize(img.width(), img.height());
    QGraphicsScene *scene = new QGraphicsScene;
    //scene->setSceneRect(0,0,img.width(),img.height());
    scene->addPixmap(QPixmap::fromImage(img));
    ui->graphicsView->setScene(scene);
    ui->graphicsView->adjustSize();
    ui->graphicsView->show();

}

void HoughDialog::on_buttonBox_accepted()
{
    emit sendImage(dst);
}