mainwindow.cpp Example File

itemviews/addressbook/mainwindow.cpp
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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); } }