diff options
Diffstat (limited to 'tests/manual/examples/widgets/mainwindows/mdi/mdichild.cpp')
-rw-r--r-- | tests/manual/examples/widgets/mainwindows/mdi/mdichild.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/mainwindows/mdi/mdichild.cpp b/tests/manual/examples/widgets/mainwindows/mdi/mdichild.cpp new file mode 100644 index 0000000000..b922826ae3 --- /dev/null +++ b/tests/manual/examples/widgets/mainwindows/mdi/mdichild.cpp @@ -0,0 +1,158 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause + +#include <QtWidgets> + +#include "mdichild.h" + +MdiChild::MdiChild(MdiChild *other) +{ + setAttribute(Qt::WA_DeleteOnClose); + if (other) { + auto *doc = other->document(); + setDocument(doc); + setWindowModified(other->isWindowModified()); + connect(doc, &QTextDocument::contentsChanged, + this, &MdiChild::documentWasModified); + curFile = other->curFile; + setWindowTitle(userFriendlyCurrentFile() + "[*]"); + } +} + +void MdiChild::newFile() +{ + static int sequenceNumber = 1; + + isUntitled = true; + curFile = tr("document%1.txt").arg(sequenceNumber++); + setWindowTitle(curFile + "[*]"); + + connect(document(), &QTextDocument::contentsChanged, + this, &MdiChild::documentWasModified); +} + +bool MdiChild::loadFile(const QString &fileName) +{ + QFile file(fileName); + if (!file.open(QFile::ReadOnly | QFile::Text)) { + QMessageBox::warning(this, tr("MDI"), + tr("Cannot read file %1:\n%2.") + .arg(fileName) + .arg(file.errorString())); + return false; + } + + QTextStream in(&file); + QGuiApplication::setOverrideCursor(Qt::WaitCursor); + setPlainText(in.readAll()); + QGuiApplication::restoreOverrideCursor(); + + setCurrentFile(fileName); + + connect(document(), &QTextDocument::contentsChanged, + this, &MdiChild::documentWasModified); + + return true; +} + +bool MdiChild::save() +{ + if (isUntitled) { + return saveAs(); + } else { + return saveFile(curFile); + } +} + +bool MdiChild::saveAs() +{ + QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"), + curFile); + if (fileName.isEmpty()) + return false; + + return saveFile(fileName); +} + +bool MdiChild::saveFile(const QString &fileName) +{ + QString errorMessage; + + QGuiApplication::setOverrideCursor(Qt::WaitCursor); + QSaveFile file(fileName); + if (file.open(QFile::WriteOnly | QFile::Text)) { + QTextStream out(&file); + out << toPlainText(); + if (!file.commit()) { + errorMessage = tr("Cannot write file %1:\n%2.") + .arg(QDir::toNativeSeparators(fileName), file.errorString()); + } + } else { + errorMessage = tr("Cannot open file %1 for writing:\n%2.") + .arg(QDir::toNativeSeparators(fileName), file.errorString()); + } + QGuiApplication::restoreOverrideCursor(); + + if (!errorMessage.isEmpty()) { + QMessageBox::warning(this, tr("MDI"), errorMessage); + return false; + } + + setCurrentFile(fileName); + return true; +} + +QString MdiChild::userFriendlyCurrentFile() +{ + return strippedName(curFile); +} + +void MdiChild::closeEvent(QCloseEvent *event) +{ + if (maybeSave()) { + event->accept(); + } else { + event->ignore(); + } +} + +void MdiChild::documentWasModified() +{ + setWindowModified(document()->isModified()); +} + +bool MdiChild::maybeSave() +{ + if (!document()->isModified()) + return true; + const QMessageBox::StandardButton ret + = QMessageBox::warning(this, tr("MDI"), + tr("'%1' has been modified.\n" + "Do you want to save your changes?") + .arg(userFriendlyCurrentFile()), + QMessageBox::Save | QMessageBox::Discard + | QMessageBox::Cancel); + switch (ret) { + case QMessageBox::Save: + return save(); + case QMessageBox::Cancel: + return false; + default: + break; + } + return true; +} + +void MdiChild::setCurrentFile(const QString &fileName) +{ + curFile = QFileInfo(fileName).canonicalFilePath(); + isUntitled = false; + document()->setModified(false); + setWindowModified(false); + setWindowTitle(userFriendlyCurrentFile() + "[*]"); +} + +QString MdiChild::strippedName(const QString &fullFileName) +{ + return QFileInfo(fullFileName).fileName(); +} |