/**************************************************************************** ** ** Copyright (C) 2016 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. 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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 typedef QDialog WordCountDialog; typedef QDialog FindDialog; #define this 0 #define setWordCount(x) isVisible() QString tr(const char *text) { return QApplication::translate(text, text); } class EditorWindow : public QMainWindow { public: void find(); void countWords(); private: FindDialog *findDialog; }; //! [0] void EditorWindow::find() { if (!findDialog) { findDialog = new FindDialog(this); connect(findDialog, SIGNAL(findNext()), this, SLOT(findNext())); } findDialog->show(); findDialog->raise(); findDialog->activateWindow(); } //! [0] //! [1] void EditorWindow::countWords() { WordCountDialog dialog(this); dialog.setWordCount(document().wordCount()); dialog.exec(); } //! [1] inline bool boo() { QMessageBox::information(this, "Application name", "Unable to find the user preferences file.\n" "The factory default will be used instead."); QString filename; if (QFile::exists(filename) && QMessageBox::question( this, tr("Overwrite File? -- Application Name"), tr("A file called %1 already exists." "Do you want to overwrite it?") .arg(filename), tr("&Yes"), tr("&No"), QString(), 0, 1)) return false; switch(QMessageBox::warning(this, "Application name", "Could not connect to the server.\n" "This program can't function correctly " "without the server.\n\n", "Retry", "Quit", 0, 0, 1)) { case 0: // The user clicked the Retry again button or pressed Enter // try again break; case 1: // The user clicked the Quit or pressed Escape // exit break; } switch(QMessageBox::information(this, "Application name here", "The document contains unsaved changes\n" "Do you want to save the changes before exiting?", "&Save", "&Discard", "Cancel", 0, // Enter == button 0 2)) { // Escape == button 2 case 0: // Save clicked or Alt+S pressed or Enter pressed. // save break; case 1: // Discard clicked or Alt+D pressed // don't save but exit break; case 2: // Cancel clicked or Escape pressed // don't exit break; } switch(QMessageBox::warning(this, "Application name here", "Could not save the user preferences,\n" "because the disk is full. You can delete\n" "some files and press Retry, or you can\n" "abort the Save Preferences operation.", QMessageBox::Retry | QMessageBox::Default, QMessageBox::Abort | QMessageBox::Escape)) { case QMessageBox::Retry: // Retry clicked or Enter pressed // try again break; case QMessageBox::Abort: // Abort clicked or Escape pressed // abort break; } QString errorDetails; QMessageBox::critical(0, "Application name here", QString("An internal error occurred. Please ") + "call technical support at 1234-56789 and report\n"+ "these numbers:\n\n" + errorDetails + "\n\nApplication will now exit."); QMessageBox::about(this, "About ", " is a \n\n" "Copyright 1991-2003 Such-and-such. " "\n\n" "For technical support, call 1234-56789 or see\n" "http://www.such-and-such.com/Application/\n"); { // saving the file QMessageBox mb("Application name here", "Saving the file will overwrite the original file on the disk.\n" "Do you really want to save?", QMessageBox::Information, QMessageBox::Yes | QMessageBox::Default, QMessageBox::No, QMessageBox::Cancel | QMessageBox::Escape); mb.setButtonText(QMessageBox::Yes, "Save"); mb.setButtonText(QMessageBox::No, "Discard"); switch(mb.exec()) { case QMessageBox::Yes: // save and exit break; case QMessageBox::No: // exit without saving break; case QMessageBox::Cancel: // don't save and don't exit break; } } { // hardware failure //! [2] QMessageBox mb("Application Name", "Hardware failure.\n\nDisk error detected\nDo you want to stop?", QMessageBox::Question, QMessageBox::Yes | QMessageBox::Default, QMessageBox::No | QMessageBox::Escape, QMessageBox::NoButton); if (mb.exec() == QMessageBox::No) { // try again //! [2] } } } inline void moo() { int numFiles; //! [3] QProgressDialog progress("Copying files...", "Abort Copy", 0, numFiles, this); progress.setWindowModality(Qt::WindowModal); for (int i = 0; i < numFiles; i++) { progress.setValue(i); if (progress.wasCanceled()) break; //... copy one file } progress.setValue(numFiles); //! [3] } class Operation : public QObject { public: Operation(QObject *parent); void perform(); void cancel(); private: int steps; QProgressDialog *pd; QTimer *t; }; //! [4] // Operation constructor Operation::Operation(QObject *parent) : QObject(parent), steps(0) { pd = new QProgressDialog("Operation in progress.", "Cancel", 0, 100); connect(pd, SIGNAL(canceled()), this, SLOT(cancel())); t = new QTimer(this); connect(t, SIGNAL(timeout()), this, SLOT(perform())); t->start(0); } //! [4] //! [5] void Operation::perform() { pd->setValue(steps); //... perform one percent of the operation steps++; if (steps > pd->maximum()) t->stop(); } //! [5] //! [6] void Operation::cancel() { t->stop(); //... cleanup } //! [6] int main() { }