mainwindow.cpp Example File | Qt Widgets 5.6

Qt 5.6 | Qt Widgets | Address Book Example | mainwindow.cpp Example File

Qt 5.6.2 Reference Documentation

# mainwindow.cpp Example File

itemviews/addressbook/mainwindow.cpp

      /****************************************************************************
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      ** This file is part of the examples of the Qt Toolkit.
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      #include "mainwindow.h"

      #include <QAction>
      #include <QFileDialog>
      #include <QMenuBar>

      MainWindow::MainWindow()
      {
          addressWidget = new AddressWidget;
          setCentralWidget(addressWidget);
          createMenus();
          setWindowTitle(tr("Address Book"));
      }

      void MainWindow::createMenus()
      {
          fileMenu = menuBar()->addMenu(tr("&File"));

          openAct = new QAction(tr("&Open..."), this);
          fileMenu->addAction(openAct);
          connect(openAct, &QAction::triggered, this, &MainWindow::openFile);

          saveAct = new QAction(tr("&Save As..."), this);
          fileMenu->addAction(saveAct);
          connect(saveAct, &QAction::triggered, this, &MainWindow::saveFile);

          fileMenu->addSeparator();

          exitAct = new QAction(tr("E&xit"), this);
          fileMenu->addAction(exitAct);
          connect(exitAct, &QAction::triggered, this, &QWidget::close);

          toolMenu = menuBar()->addMenu(tr("&Tools"));

          addAct = new QAction(tr("&Add Entry..."), this);
          toolMenu->addAction(addAct);
          connect(addAct, &QAction::triggered, addressWidget, &AddressWidget::showAddEntryDialog);

          editAct = new QAction(tr("&Edit Entry..."), this);
          editAct->setEnabled(false);
          toolMenu->addAction(editAct);
          connect(editAct, &QAction::triggered, addressWidget, &AddressWidget::editEntry);

          toolMenu->addSeparator();

          removeAct = new QAction(tr("&Remove Entry"), this);
          removeAct->setEnabled(false);
          toolMenu->addAction(removeAct);
          connect(removeAct, &QAction::triggered, addressWidget, &AddressWidget::removeEntry);

          connect(addressWidget, &AddressWidget::selectionChanged,
              this, &MainWindow::updateActions);
      }

      void MainWindow::openFile()
      {
          QString fileName = QFileDialog::getOpenFileName(this);
          if (!fileName.isEmpty())
              addressWidget->readFromFile(fileName);
      }

      void MainWindow::saveFile()
      {
          QString fileName = QFileDialog::getSaveFileName(this);
          if (!fileName.isEmpty())
              addressWidget->writeToFile(fileName);
      }

      void MainWindow::updateActions(const QItemSelection &selection)
      {
          QModelIndexList indexes = selection.indexes();

          if (!indexes.isEmpty()) {
              removeAct->setEnabled(true);
              editAct->setEnabled(true);
          } else {
              removeAct->setEnabled(false);
              editAct->setEnabled(false);
          }
      }