imageproc / hsiview

  #include "spectrumwindow.h"
  #include "ui_spectrumwindow.h"
  
  #include "mainwindow.h"
  
  SpectrumWindow::SpectrumWindow(QWidget *parent) :
      QDialog(parent),
      ui(new Ui::SpectrumWindow)
  {
      ui->setupUi(this);

  	
  	//install an event filter to detect user clicks

  	ui->spectrumPlot->installEventFilter(this);

  
  	//create a line for the current band
  	bandline = new QCPItemStraightLine(ui->spectrumPlot);
  	ui->spectrumPlot->addItem(bandline);
  
  	
  

  }
  
  SpectrumWindow::~SpectrumWindow()
  {
      delete ui;
  }
  
  void SpectrumWindow::plotSpectrum(QVector<double> x, QVector<double> y){
  
  	//find the maximum and minimum values
  	double y_min = y[0];
  	double y_max = y[0];
  	for(int i=1; i<y.size(); i++){
  		if(y[i] < y_min) y_min = y[i];
  		if(y[i] > y_max) y_max = y[i];
  	}

  
  	//set the range of the y axis to the minimum and maximum spectrum values

  	ui->spectrumPlot->yAxis->setRange(y_min, y_max);
  

  	//add the graph to the plot

  	ui->spectrumPlot->addGraph();
  	ui->spectrumPlot->graph(0)->setData(x, y);

  
  	//redraw the plot

  	ui->spectrumPlot->replot();
  }
  
  void SpectrumWindow::initPlot(double x_min, double x_max, double y_min, double y_max, QString x_title, QString y_title){
  	// give the axes some labels:
  	ui->spectrumPlot->xAxis->setLabel(x_title);
  	ui->spectrumPlot->yAxis->setLabel(y_title);
  	// set axes ranges, so we see all data:
  	ui->spectrumPlot->xAxis->setRange(x_min, x_max);
  	ui->spectrumPlot->yAxis->setRange(y_min, y_max);

  
  	//set the initial position of the band line
  	double xmid = (x_max + x_min) / 2;
  	std::cout<<"xmid: "<<xmid<<std::endl;
  	bandline->point1->setCoords(xmid, 0);
  	bandline->point2->setCoords(xmid, 1);
  	bandline->setPen(QPen(Qt::red));
  
  

  	ui->spectrumPlot->replot();
  }
  
  /// Update the image viewing widget so that it always fills the main window
  void SpectrumWindow::resizeEvent(QResizeEvent* event){
  
  	//get the current window size
  	QSize winsize = event->size();
  
  	//match the plot to the window
  	ui->spectrumPlot->setFixedSize(winsize.width(), winsize.height());
  }
  
  bool SpectrumWindow::eventFilter(QObject *target, QEvent *event)
  {

      if(target == ui->spectrumPlot && event->type() == QEvent::MouseMove)
      {
          QMouseEvent *_mouseEvent = static_cast<QMouseEvent*>(event);
  
  		//get the window position of the click
  		QPoint pixel = _mouseEvent->pos();
  
  
  		//calculate the position of the click in the image
  		double x = ui->spectrumPlot->xAxis->pixelToCoord(pixel.x());
  		double y = ui->spectrumPlot->yAxis->pixelToCoord(pixel.y());

  
  		//set the position of the band line
  		bandline->point1->setCoords(x, 0);
  		bandline->point2->setCoords(x, 1);

      }
  	else if(target == ui->spectrumPlot && event->type() == QEvent::MouseButtonPress)
      {
          QMouseEvent *_mouseEvent = static_cast<QMouseEvent*>(event);
  
  		//get the window position of the click
  		QPoint pixel = _mouseEvent->pos();
  
  
  		//calculate the position of the click in the image
  		double x = ui->spectrumPlot->xAxis->pixelToCoord(pixel.x());
  		double y = ui->spectrumPlot->yAxis->pixelToCoord(pixel.y());
  
  		//tell the parent MainWindow that a point on the spectrum was selected
  		((MainWindow*)parent())->mousePressSpectrum(x, y);

  
  		//set the position of the band line
  		bandline->point1->setCoords(x, 0);
  		bandline->point2->setCoords(x, 1);

      }

      return false;

  }