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++ // Copyright (C) 2017 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include <QFile>
++ #include <QFileDialog>
++ #include <QTextStream>
++ #include <QMessageBox>
++ #if defined(QT_PRINTSUPPORT_LIB)
++ #include <QtPrintSupport/qtprintsupportglobal.h>
++ #if QT_CONFIG(printer)
++ #if QT_CONFIG(printdialog)
++ #include <QPrintDialog>
++ #endif // QT_CONFIG(printdialog)
++ #include <QPrinter>
++ #endif // QT_CONFIG(printer)
++ #endif // QT_PRINTSUPPORT_LIB
++ #include <QFont>
++ #include <QFontDialog>
++
++ #include "notepad.h"
++ #include "ui_notepad.h"
++
++ Notepad::Notepad(QWidget *parent) :
++ QMainWindow(parent),
++ ui(new Ui::Notepad)
++ {
++ ui->setupUi(this);
++
++ connect(ui->actionNew, &QAction::triggered, this, &Notepad::newDocument);
++ connect(ui->actionOpen, &QAction::triggered, this, &Notepad::open);
++ connect(ui->actionSave, &QAction::triggered, this, &Notepad::save);
++ connect(ui->actionSave_as, &QAction::triggered, this, &Notepad::saveAs);
++ connect(ui->actionPrint, &QAction::triggered, this, &Notepad::print);
++ connect(ui->actionExit, &QAction::triggered, this, &QWidget::close);
++ #if QT_CONFIG(clipboard)
++ connect(ui->textEdit, &QTextEdit::copyAvailable, ui->actionCopy, &QAction::setEnabled);
++ connect(ui->actionCopy, &QAction::triggered, ui->textEdit, &QTextEdit::copy);
++ connect(ui->actionCut, &QAction::triggered, ui->textEdit, &QTextEdit::cut);
++ connect(ui->actionPaste, &QAction::triggered, ui->textEdit, &QTextEdit::paste);
++ #endif
++ connect(ui->textEdit, &QTextEdit::undoAvailable, ui->actionUndo, &QAction::setEnabled);
++ connect(ui->actionUndo, &QAction::triggered, ui->textEdit, &QTextEdit::undo);
++ connect(ui->textEdit, &QTextEdit::redoAvailable, ui->actionRedo, &QAction::setEnabled);
++ connect(ui->actionRedo, &QAction::triggered, ui->textEdit, &QTextEdit::redo);
++
++ connect(ui->actionFont, &QAction::triggered, this, &Notepad::selectFont);
++ connect(ui->actionBold, &QAction::triggered, this, &Notepad::setFontBold);
++ connect(ui->actionUnderline, &QAction::triggered, this, &Notepad::setFontUnderline);
++ connect(ui->actionItalic, &QAction::triggered, this, &Notepad::setFontItalic);
++ connect(ui->actionAbout, &QAction::triggered, this, &Notepad::about);
++
++ // Disable menu actions for unavailable features
++ #if !defined(QT_PRINTSUPPORT_LIB) || !QT_CONFIG(printer)
++ ui->actionPrint->setEnabled(false);
++ #endif
++
++ #if !QT_CONFIG(clipboard)
++ ui->actionCut->setEnabled(false);
++ ui->actionCopy->setEnabled(false);
++ ui->actionPaste->setEnabled(false);
++ #endif
++ }
++
++ Notepad::~Notepad()
++ {
++ delete ui;
++ }
++
++ void Notepad::newDocument()
++ {
++ currentFile.clear();
++ ui->textEdit->setText(QString());
++ }
++
++ void Notepad::open()
++ {
++ QString fileName = QFileDialog::getOpenFileName(this, "Open the file");
++ if (fileName.isEmpty())
++ return;
++ QFile file(fileName);
++ currentFile = fileName;
++ if (!file.open(QIODevice::ReadOnly | QFile::Text)) {
++ QMessageBox::warning(this, "Warning", "Cannot open file: " + file.errorString());
++ return;
++ }
++ setWindowTitle(fileName);
++ QTextStream in(&file);
++ QString text = in.readAll();
++ ui->textEdit->setText(text);
++ file.close();
++ }
++
++ void Notepad::save()
++ {
++ QString fileName;
++ // If we don't have a filename from before, get one.
++ if (currentFile.isEmpty()) {
++ fileName = QFileDialog::getSaveFileName(this, "Save");
++ if (fileName.isEmpty())
++ return;
++ currentFile = fileName;
++ } else {
++ fileName = currentFile;
++ }
++ QFile file(fileName);
++ if (!file.open(QIODevice::WriteOnly | QFile::Text)) {
++ QMessageBox::warning(this, "Warning", "Cannot save file: " + file.errorString());
++ return;
++ }
++ setWindowTitle(fileName);
++ QTextStream out(&file);
++ QString text = ui->textEdit->toPlainText();
++ out << text;
++ file.close();
++ }
++
++ void Notepad::saveAs()
++ {
++ QString fileName = QFileDialog::getSaveFileName(this, "Save as");
++ if (fileName.isEmpty())
++ return;
++ QFile file(fileName);
++
++ if (!file.open(QFile::WriteOnly | QFile::Text)) {
++ QMessageBox::warning(this, "Warning", "Cannot save file: " + file.errorString());
++ return;
++ }
++ currentFile = fileName;
++ setWindowTitle(fileName);
++ QTextStream out(&file);
++ QString text = ui->textEdit->toPlainText();
++ out << text;
++ file.close();
++ }
++
++ void Notepad::print()
++ {
++ #if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer)
++ QPrinter printDev;
++ #if QT_CONFIG(printdialog)
++ QPrintDialog dialog(&printDev, this);
++ if (dialog.exec() == QDialog::Rejected)
++ return;
++ #endif // QT_CONFIG(printdialog)
++ ui->textEdit->print(&printDev);
++ #endif // QT_CONFIG(printer)
++ }
++
++ void Notepad::selectFont()
++ {
++ bool fontSelected;
++ QFont font = QFontDialog::getFont(&fontSelected, this);
++ if (fontSelected)
++ ui->textEdit->setFont(font);
++ }
++
++ void Notepad::setFontUnderline(bool underline)
++ {
++ ui->textEdit->setFontUnderline(underline);
++ }
++
++ void Notepad::setFontItalic(bool italic)
++ {
++ ui->textEdit->setFontItalic(italic);
++ }
++
++ void Notepad::setFontBold(bool bold)
++ {
++ bold ? ui->textEdit->setFontWeight(QFont::Bold) :
++ ui->textEdit->setFontWeight(QFont::Normal);
++ }
++
++ void Notepad::about()
++ {
++ QMessageBox::about(this, tr("About Notepad"),
++ tr("The <b>Notepad</b> example demonstrates how to code a basic "
++ "text editor using QtWidgets"));
++ }