working ver with QT

particle-track-and-trace/src/QT/MainWindow.cpp

@@ -0,0 +1,57 @@
+#include "MainWindow.h"
+
+#include <QFile>
+#include <QFileDialog>
+#include <QMessageBox>
+
+#include <vtkDataSetReader.h>
+
+MainWindow::MainWindow(QWidget* parent)
+    : QMainWindow(parent)
+    , ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+}
+
+MainWindow::~MainWindow() { delete ui; }
+
+void MainWindow::showAboutDialog()
+{
+    QMessageBox::information(
+        this, "About",
+        "interactive particle in-fluid simulation program for surface level advection.");
+}
+
+void MainWindow::showOpenFileDialog()
+{
+    QString fileName = QFileDialog::getOpenFileName(this, tr("Open file"), "",
+        "VTK Files (*.vtk)");
+
+    // Open file
+    QFile file(fileName);
+    file.open(QIODevice::ReadOnly);
+
+    // Return on Cancel
+    if (!file.exists())
+        return;
+
+    openFile(fileName);
+}
+
+void MainWindow::openFile(const QString& fileName)
+{
+    ui->sceneWidget->removeDataSet();
+
+    // Create reader
+    vtkSmartPointer<vtkDataSetReader> reader = vtkSmartPointer<vtkDataSetReader>::New();
+    reader->SetFileName(fileName.toStdString().c_str());
+
+    // Read the file
+    reader->Update();
+
+    // Add data set to 3D view
+    vtkSmartPointer<vtkDataSet> dataSet = reader->GetOutput();
+    if (dataSet != nullptr) {
+        ui->sceneWidget->addDataSet(reader->GetOutput());
+    }
+}