2b75c156b6
Change-Id: I6441ff931dbd33b698d762e6f6784898f3f60fe7 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
269 lines
8.4 KiB
C++
269 lines
8.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the documentation of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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typedef QDialog WordCountDialog;
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typedef QDialog FindDialog;
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#define this 0
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#define setWordCount(x) isVisible()
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QString tr(const char *text)
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{
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return QApplication::translate(text, text);
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}
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class EditorWindow : public QMainWindow
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{
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public:
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void find();
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void countWords();
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private:
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FindDialog *findDialog;
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};
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//! [0]
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void EditorWindow::find()
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{
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if (!findDialog) {
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findDialog = new FindDialog(this);
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connect(findDialog, SIGNAL(findNext()), this, SLOT(findNext()));
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}
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findDialog->show();
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findDialog->raise();
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findDialog->activateWindow();
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}
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//! [0]
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//! [1]
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void EditorWindow::countWords()
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{
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WordCountDialog dialog(this);
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dialog.setWordCount(document().wordCount());
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dialog.exec();
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}
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//! [1]
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inline bool boo()
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{
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QMessageBox::information(this, "Application name",
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"Unable to find the user preferences file.\n"
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"The factory default will be used instead.");
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QString filename;
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if (QFile::exists(filename) &&
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QMessageBox::question(
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this,
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tr("Overwrite File? -- Application Name"),
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tr("A file called %1 already exists."
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"Do you want to overwrite it?")
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.arg(filename),
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tr("&Yes"), tr("&No"),
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QString(), 0, 1))
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return false;
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switch(QMessageBox::warning(this, "Application name",
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"Could not connect to the <mumble> server.\n"
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"This program can't function correctly "
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"without the server.\n\n",
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"Retry",
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"Quit", 0, 0, 1)) {
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case 0: // The user clicked the Retry again button or pressed Enter
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// try again
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break;
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case 1: // The user clicked the Quit or pressed Escape
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// exit
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break;
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}
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switch(QMessageBox::information(this, "Application name here",
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"The document contains unsaved changes\n"
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"Do you want to save the changes before exiting?",
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"&Save", "&Discard", "Cancel",
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0, // Enter == button 0
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2)) { // Escape == button 2
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case 0: // Save clicked or Alt+S pressed or Enter pressed.
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// save
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break;
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case 1: // Discard clicked or Alt+D pressed
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// don't save but exit
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break;
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case 2: // Cancel clicked or Escape pressed
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// don't exit
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break;
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}
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switch(QMessageBox::warning(this, "Application name here",
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"Could not save the user preferences,\n"
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"because the disk is full. You can delete\n"
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"some files and press Retry, or you can\n"
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"abort the Save Preferences operation.",
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QMessageBox::Retry | QMessageBox::Default,
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QMessageBox::Abort | QMessageBox::Escape)) {
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case QMessageBox::Retry: // Retry clicked or Enter pressed
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// try again
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break;
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case QMessageBox::Abort: // Abort clicked or Escape pressed
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// abort
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break;
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}
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QString errorDetails;
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QMessageBox::critical(0, "Application name here",
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QString("An internal error occurred. Please ") +
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"call technical support at 1234-56789 and report\n"+
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"these numbers:\n\n" + errorDetails +
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"\n\nApplication will now exit.");
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QMessageBox::about(this, "About <Application>",
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"<Application> is a <one-paragraph blurb>\n\n"
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"Copyright 1991-2003 Such-and-such. "
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"<License words here.>\n\n"
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"For technical support, call 1234-56789 or see\n"
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"http://www.such-and-such.com/Application/\n");
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{
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// saving the file
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QMessageBox mb("Application name here",
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"Saving the file will overwrite the original file on the disk.\n"
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"Do you really want to save?",
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QMessageBox::Information,
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QMessageBox::Yes | QMessageBox::Default,
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QMessageBox::No,
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QMessageBox::Cancel | QMessageBox::Escape);
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mb.setButtonText(QMessageBox::Yes, "Save");
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mb.setButtonText(QMessageBox::No, "Discard");
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switch(mb.exec()) {
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case QMessageBox::Yes:
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// save and exit
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break;
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case QMessageBox::No:
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// exit without saving
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break;
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case QMessageBox::Cancel:
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// don't save and don't exit
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break;
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}
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}
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{
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// hardware failure
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//! [2]
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QMessageBox mb("Application Name",
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"Hardware failure.\n\nDisk error detected\nDo you want to stop?",
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QMessageBox::Question,
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QMessageBox::Yes | QMessageBox::Default,
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QMessageBox::No | QMessageBox::Escape,
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QMessageBox::NoButton);
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if (mb.exec() == QMessageBox::No) {
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// try again
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//! [2]
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}
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}
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}
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inline void moo()
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{
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int numFiles;
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//! [3]
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QProgressDialog progress("Copying files...", "Abort Copy", 0, numFiles, this);
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progress.setWindowModality(Qt::WindowModal);
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for (int i = 0; i < numFiles; i++) {
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progress.setValue(i);
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if (progress.wasCanceled())
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break;
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//... copy one file
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}
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progress.setValue(numFiles);
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//! [3]
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}
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class Operation : public QObject
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{
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public:
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Operation(QObject *parent);
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void perform();
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void cancel();
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private:
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int steps;
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QProgressDialog *pd;
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QTimer *t;
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};
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//! [4]
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// Operation constructor
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Operation::Operation(QObject *parent)
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: QObject(parent), steps(0)
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{
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pd = new QProgressDialog("Operation in progress.", "Cancel", 0, 100);
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connect(pd, SIGNAL(canceled()), this, SLOT(cancel()));
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t = new QTimer(this);
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connect(t, SIGNAL(timeout()), this, SLOT(perform()));
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t->start(0);
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}
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//! [4] //! [5]
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void Operation::perform()
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{
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pd->setValue(steps);
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//... perform one percent of the operation
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steps++;
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if (steps > pd->maximum())
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t->stop();
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}
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//! [5] //! [6]
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void Operation::cancel()
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{
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t->stop();
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//... cleanup
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}
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//! [6]
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int main()
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{
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}
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