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Diffstat (limited to 'examples/widgets/tutorials/notepad/notepad.cpp')
| -rw-r--r-- | examples/widgets/tutorials/notepad/notepad.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/examples/widgets/tutorials/notepad/notepad.cpp b/examples/widgets/tutorials/notepad/notepad.cpp new file mode 100644 index 0000000000..b4f6cf7f8f --- /dev/null +++ b/examples/widgets/tutorials/notepad/notepad.cpp @@ -0,0 +1,182 @@ +/**************************************************************************** +** +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QFile> +#include <QFileDialog> +#include <QTextStream> +#include <QMessageBox> +#include <QPrintDialog> +#include <QPrinter> +#include <QFont> +#include <QFontDialog> + +#include "notepad.h" +#include "ui_notepad.h" + +Notepad::Notepad(QWidget *parent) : + QMainWindow(parent), + ui(new Ui::Notepad) +{ + ui->setupUi(this); + this->setCentralWidget(ui->textEdit); +} + +Notepad::~Notepad() +{ + delete ui; +} + +void Notepad::on_actionNew_triggered() +{ + currentFile.clear(); + ui->textEdit->setText(QString()); +} + +void Notepad::on_actionOpen_triggered() +{ + QString fileName = QFileDialog::getOpenFileName(this, "Open the file"); + 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::on_actionSave_triggered() +{ + QString fileName; + // If we don't have a filename from before, get one. + if (currentFile.isEmpty()) { + fileName = QFileDialog::getSaveFileName(this, "Save"); + 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::on_actionSave_as_triggered() +{ + QString fileName = QFileDialog::getSaveFileName(this, "Save as"); + 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::on_actionPrint_triggered() +{ + QPrinter printDev; + QPrintDialog dialog(&printDev, this); + if (dialog.exec() == QDialog::Rejected) + return; + ui->textEdit->print(&printDev); +} + +void Notepad::on_actionExit_triggered() +{ + QCoreApplication::quit(); +} + +void Notepad::on_actionCopy_triggered() +{ + ui->textEdit->copy(); +} + +void Notepad::on_actionCut_triggered() +{ + ui->textEdit->cut(); +} + +void Notepad::on_actionPaste_triggered() +{ + ui->textEdit->paste(); +} + +void Notepad::on_actionUndo_triggered() +{ + ui->textEdit->undo(); +} + +void Notepad::on_actionRedo_triggered() +{ + ui->textEdit->redo(); +} + +void Notepad::on_actionFont_triggered() +{ + bool fontSelected; + QFont font = QFontDialog::getFont(&fontSelected, this); + if (fontSelected) + ui->textEdit->setFont(font); +} |