mainwindow.cpp Example File

tools/customcompleter/mainwindow.cpp
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#include <QtWidgets> #include "mainwindow.h" #include "textedit.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), completer(0) { createMenu(); completingTextEdit = new TextEdit; completer = new QCompleter(this); completer->setModel(modelFromFile(":/resources/wordlist.txt")); completer->setModelSorting(QCompleter::CaseInsensitivelySortedModel); completer->setCaseSensitivity(Qt::CaseInsensitive); completer->setWrapAround(false); completingTextEdit->setCompleter(completer); setCentralWidget(completingTextEdit); resize(500, 300); setWindowTitle(tr("Completer")); } void MainWindow::createMenu() { QAction *exitAction = new QAction(tr("Exit"), this); QAction *aboutAct = new QAction(tr("About"), this); QAction *aboutQtAct = new QAction(tr("About Qt"), this); connect(exitAction, SIGNAL(triggered()), qApp, SLOT(quit())); connect(aboutAct, SIGNAL(triggered()), this, SLOT(about())); connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt())); QMenu* fileMenu = menuBar()->addMenu(tr("File")); fileMenu->addAction(exitAction); QMenu* helpMenu = menuBar()->addMenu(tr("About")); helpMenu->addAction(aboutAct); helpMenu->addAction(aboutQtAct); } QAbstractItemModel *MainWindow::modelFromFile(const QString& fileName) { QFile file(fileName); if (!file.open(QFile::ReadOnly)) return new QStringListModel(completer); #ifndef QT_NO_CURSOR QApplication::setOverrideCursor(QCursor(Qt::WaitCursor)); #endif QStringList words; while (!file.atEnd()) { QByteArray line = file.readLine(); if (!line.isEmpty()) words << line.trimmed(); } #ifndef QT_NO_CURSOR QApplication::restoreOverrideCursor(); #endif return new QStringListModel(words, completer); } void MainWindow::about() { QMessageBox::about(this, tr("About"), tr("This example demonstrates the " "different features of the QCompleter class.")); }