rtstructreaderdialog.cpp

/********************************************************************************
MIT License

Copyright (c) 2021 Jothy Selvaraj

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of this software and associated documentation files (the "Software"), to deal
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********************************************************************************/

#include "rtstructreaderdialog.h"

#include "ui_rtstructreaderdialog.h"

#define vtkRenderingCore_AUTOINIT \
  3(vtkInteractionStyle, vtkRenderingFreeType, vtkRenderingOpenGL2)
#define vtkRenderingVolume_AUTOINIT 1(vtkRenderingVolumeOpenGL2)

#include <gdcmAttribute.h>
#include <gdcmDataElement.h>
#include <gdcmDataSet.h>
#include <gdcmFile.h>
#include <gdcmItem.h>
#include <gdcmNestedModuleEntries.h>
#include <gdcmReader.h>
#include <gdcmSequenceOfItems.h>
#include <gdcmTag.h>

#include <QDebug>
#include <QFileDialog>
#include <QListWidgetItem>
#include <QMessageBox>

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

  // For auto opening the file dialog
  this->ui->pushButtonChooseFile->click();
}

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

void RTStructReaderDialog::on_pushButtonChooseFile_clicked() {
  this->ui->listWidgetStructs->clear();
  this->structFileName =
      QFileDialog::getOpenFileName(this, "Open RT Structures");
  this->ui->lineEdit->setText(this->structFileName);
  gdcm::Reader RTreader;
  RTreader.SetFileName(this->structFileName.toLatin1().data());

  // show error msg if file can't be read.
  if (!RTreader.Read()) {
    QMessageBox msgBox;
    msgBox.setText("Not a valid DICOM file!");
    msgBox.setIcon(QMessageBox::Critical);
    msgBox.exec();
  }

  else  // Start reading the necessary info
  {
    const gdcm::DataSet &ds = RTreader.GetFile().GetDataSet();

    gdcm::Tag tssroisq(0x3006, 0x0020);  // Structure set ROI sequence
    if (!ds.FindDataElement(tssroisq)) {
      // qDebug() <<"Problem locating 0x3006,0x0020 - Is this a valid RT Struct
      // file?";
      QMessageBox msgBox;
      msgBox.setText("This is not a valid RT structure file!");
      msgBox.setIcon(QMessageBox::Critical);
      msgBox.exec();
    }

    else {
      gdcm::Tag troicsq(0x3006, 0x0039);  // ROI contour sequence
      if (!ds.FindDataElement(troicsq)) {
        // qDebug() << "Problem locating 0x3006,0x0039 - Is this a valid RT
        // Struct file?";
        QMessageBox msgBox;
        msgBox.setText("This is not a RT structure file!");
        msgBox.setIcon(QMessageBox::Critical);
        msgBox.exec();
      } else {
        gdcm::Tag troiobsq(0x3006, 0x0080);  // ROI observation sequence
        const gdcm::DataElement &roicsq = ds.GetDataElement(troicsq);
        gdcm::SmartPointer<gdcm::SequenceOfItems> sqi = roicsq.GetValueAsSQ();

        const gdcm::DataElement &ssroisq = ds.GetDataElement(tssroisq);
        gdcm::SmartPointer<gdcm::SequenceOfItems> ssqi = ssroisq.GetValueAsSQ();
        this->NumberOfROIs = sqi->GetNumberOfItems();
        // qDebug()<< "Number of structures found:" <<  this->NumberOfROIs;

        const gdcm::DataElement &roiobsq = ds.GetDataElement(troiobsq);
        gdcm::SmartPointer<gdcm::SequenceOfItems> obsq =
            roiobsq.GetValueAsSQ();  // observation sequence
        qDebug() << "No. of ROIs found:" << this->NumberOfROIs;
        if (this->NumberOfROIs > 50) {
          this->NumberOfROIs = 50;  // Only read the first 50 ROIs
          QMessageBox messageBox;
          messageBox.warning(
              this, "Warning",
              "More than 50 ROIs found, only reading the first 50.");
          messageBox.setFixedSize(500, 200);
        }

        for (int i = 1; i < this->NumberOfROIs + 1; i++) {
          // Get the ROI Nos.
          gdcm::Item &item = sqi->GetItem(i);
          const gdcm::DataSet &nestedds = item.GetNestedDataSet();

          // Get ROIs  color
          gdcm::Attribute<0x3006, 0x002a> roiColor;  // ROI color tag
          roiColor.SetFromDataElement(
              nestedds.GetDataElement(roiColor.GetTag()));
          double R = roiColor.GetValues()[0];
          double G = roiColor.GetValues()[1];
          double B = roiColor.GetValues()[2];
          // qDebug()<<"ROi color:"<<R<<G<<B;
          this->ROIColors[i - 1][0] = R;
          this->ROIColors[i - 1][1] = G;
          this->ROIColors[i - 1][2] = B;  // C++ array starts from "0".

          // Get ROI Names
          gdcm::Item &sitem = ssqi->GetItem(i);
          gdcm::Attribute<0x3006, 0x0026>
              roiName;  // ROI Name tag in Structure Set ROI Sequence
          const gdcm::DataSet &snestedds = sitem.GetNestedDataSet();
          roiName.SetFromDataElement(
              snestedds.GetDataElement(roiName.GetTag()));
          // qDebug()<<roiName.GetValue();
          this->ROINames.append(QString(roiName.GetValue()));

          QListWidgetItem *wItem =
              new QListWidgetItem(QString(roiName.GetValue()));
          wItem->setCheckState(Qt::Unchecked);
          wItem->setBackgroundColor(QColor(R, G, B));
          this->ui->listWidgetStructs->addItem(wItem);
        }
      }
    }
  }
}

void RTStructReaderDialog::getSelectedItems() {
  this->selectedItems.clear();
  if (this->ui->groupBox->isChecked()) {
    for (int i = 0; i < this->NumberOfROIs; i++) {
      int checkState = this->ui->listWidgetStructs->item(i)->checkState();
      //           qDebug()<<checkState<<"checkState";
      if (checkState == 2) {
        this->selectedItems.append(i +
                                   1);  // In GDCM dicom items start from "1";
      }
    }

  } else {
    for (int i = 0; i < this->NumberOfROIs; i++) {
      this->selectedItems.append(i + 1);
    }
  }
}

void RTStructReaderDialog::on_pushButtonRead_clicked() {
  this->getSelectedItems();
  this->close();
}