Qt 5.11 | Qt Widgets | Simple DOM Model Example | mainwindow.cpp Example File

Qt 5.11.3 Reference Documentation

# mainwindow.cpp Example File

itemviews/simpledommodel/mainwindow.cpp

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      #include "dommodel.h"
      #include "mainwindow.h"

      #include <QDomDocument>
      #include <QTreeView>
      #include <QMenuBar>
      #include <QFileDialog>

      MainWindow::MainWindow() : QMainWindow(), model(0)
      {
          fileMenu = menuBar()->addMenu(tr("&File"));
          fileMenu->addAction(tr("&Open..."), this, &MainWindow::openFile, QKeySequence::Open);
          fileMenu->addAction(tr("E&xit"), this, &QWidget::close, QKeySequence::Quit);

          model = new DomModel(QDomDocument(), this);
          view = new QTreeView(this);
          view->setModel(model);

          setCentralWidget(view);
          setWindowTitle(tr("Simple DOM Model"));
      }

      void MainWindow::openFile()
      {
          QString filePath = QFileDialog::getOpenFileName(this, tr("Open File"),
              xmlPath, tr("XML files (*.xml);;HTML files (*.html);;"
                          "SVG files (*.svg);;User Interface files (*.ui)"));

          if (!filePath.isEmpty()) {
              QFile file(filePath);
              if (file.open(QIODevice::ReadOnly)) {
                  QDomDocument document;
                  if (document.setContent(&file)) {
                      DomModel *newModel = new DomModel(document, this);
                      view->setModel(newModel);
                      delete model;
                      model = newModel;
                      xmlPath = filePath;
                  }
                  file.close();
              }
          }
      }