qt5base-lts/examples/mainwindows/mdi/mdichild.cpp
Lars Knoll e510b6e466 include fixes
Fixed the include statements
added QT+=widgets in examples/network to
get them to compile. Will need something better
than doing it manually.
2011-05-07 22:57:49 +02:00

176 lines
5.2 KiB
C++

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtWidgets>
#include "mdichild.h"
MdiChild::MdiChild()
{
setAttribute(Qt::WA_DeleteOnClose);
isUntitled = true;
}
void MdiChild::newFile()
{
static int sequenceNumber = 1;
isUntitled = true;
curFile = tr("document%1.txt").arg(sequenceNumber++);
setWindowTitle(curFile + "[*]");
connect(document(), SIGNAL(contentsChanged()),
this, SLOT(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);
QApplication::setOverrideCursor(Qt::WaitCursor);
setPlainText(in.readAll());
QApplication::restoreOverrideCursor();
setCurrentFile(fileName);
connect(document(), SIGNAL(contentsChanged()),
this, SLOT(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)
{
QFile file(fileName);
if (!file.open(QFile::WriteOnly | QFile::Text)) {
QMessageBox::warning(this, tr("MDI"),
tr("Cannot write file %1:\n%2.")
.arg(fileName)
.arg(file.errorString()));
return false;
}
QTextStream out(&file);
QApplication::setOverrideCursor(Qt::WaitCursor);
out << toPlainText();
QApplication::restoreOverrideCursor();
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()) {
QMessageBox::StandardButton ret;
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);
if (ret == QMessageBox::Save)
return save();
else if (ret == QMessageBox::Cancel)
return false;
}
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();
}