C:/Projekte/C++/FlowVIS_107/src/MainWindow.cpp

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#include "MainWindow.h"
#include <QFileDialog>

MainWindow::MainWindow(QWidget* parent /*= 0*/, Qt::WFlags flags /*= 0*/) : QMainWindow(parent, flags)
{
        setupUi(this);

  flowData = NULL;
  isFileOpened = false;

  glWidget = new OpenGLWidget(this);
  navigation = new Navigation(glWidget, this);

  gridLayout = new QGridLayout();
  gridLayout->addWidget(navigation, 0, 0);
  gridLayout->addWidget(glWidget, 0, 1, 0, 3);

  m_centralwidget->setLayout(gridLayout);

  connect(actionLoad, SIGNAL(triggered()), this, SLOT(openFile()) );
  connect(actionClose, SIGNAL(triggered()), this, SLOT(closeFile()) );

  // load/save/reset tf
  connect(m_saveTF, SIGNAL(triggered()), navigation, SLOT(saveTF()));
  connect(m_loadTF, SIGNAL(triggered()), navigation, SLOT(loadTF()));
  connect(m_resetTF, SIGNAL(triggered()), navigation, SLOT(resetTF()));

  // nk - connect reset data view
  connect(m_resetView, SIGNAL(triggered()), glWidget, SLOT(resetDataView()));
  
  // nk - enable/disable UI elements dependent on file status
  navigation->resetGuiElements(isFileOpened);
}

MainWindow::~MainWindow()
{
  delete flowData;
  delete navigation;
  delete glWidget;
}

void MainWindow::openFile()
{
  cout << "open file..." << endl;
  if(isFileOpened) 
    closeFile();

        QString fileName = QFileDialog::getOpenFileName( this, tr("Load Flow Grid"), ".", tr("Data Sets (*.gri)") );

        if( !fileName.isNull() )
        {
                std::string strFileName = std::string( fileName.toLatin1() );
    strFileName.erase(strFileName.find(".gri"), 4);
    
    cout << "File: " << strFileName.c_str() << endl;;

    if(flowData == NULL)
    {
      flowData = new FlowData();
    }
     
    // load dataset
    isFileOpened = flowData->loadDataset( strFileName.c_str(), false );

    if(isFileOpened)
    {
      // gv Do NOT manipulate data here!! Do this in the corresponding methods loadDataset and readFromFile !!!

      navigation->resetGuiElements(isFileOpened);

      navigation->createColorBar(isFileOpened);

      navigation->setBackgroundChooser( flowData->getScalarChannelCount() );

      glWidget->setFlowData(flowData);
      //glWidget->setPointSpriteTexture();
      glWidget->update();
    }
  }
}

void MainWindow::closeFile()
{
  cout << "close file..." << endl;

  isFileOpened = false;

  navigation->setBackgroundChooser(isFileOpened);

  navigation->createColorBar(isFileOpened);

  navigation->resetGuiElements(isFileOpened);

  delete flowData;
  flowData = NULL;
  glWidget->setFlowData(flowData);
  glWidget->update();
}

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