Qt 4.6: dialog.cpp Example File (dialogs/standarddialogs/dialog.cpp)

|  | Home · All Classes · Overviews |

# dialog.cpp Example File
dialogs/standarddialogs/dialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** No Commercial Usage
     ** This file contains pre-release code and may not be distributed.
     ** You may use this file in accordance with the terms and conditions
     ** contained in the Technology Preview License Agreement accompanying
     ** this package.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
     ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** In addition, as a special exception, Nokia gives you certain
     ** additional rights.  These rights are described in the Nokia Qt LGPL
     ** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
     ** package.
     **
     ** If you have questions regarding the use of this file, please contact
     ** Nokia at qt-info@nokia.com.
     **
     **
     **
     **
     **
     **
     **
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include <QtGui>

     #include "dialog.h"

     #define MESSAGE \
         Dialog::tr("<p>Message boxes have a caption, a text, " \
                    "and any number of buttons, each with standard or custom texts." \
                    "<p>Click a button to close the message box. Pressing the Esc button " \
                    "will activate the detected escape button (if any).")

     Dialog::Dialog(QWidget *parent)
         : QDialog(parent)
     {
         errorMessageDialog = new QErrorMessage(this);

         int frameStyle = QFrame::Sunken | QFrame::Panel;

         integerLabel = new QLabel;
         integerLabel->setFrameStyle(frameStyle);
         QPushButton *integerButton =
                 new QPushButton(tr("QInputDialog::get&Int()"));

         doubleLabel = new QLabel;
         doubleLabel->setFrameStyle(frameStyle);
         QPushButton *doubleButton =
                 new QPushButton(tr("QInputDialog::get&Double()"));

         itemLabel = new QLabel;
         itemLabel->setFrameStyle(frameStyle);
         QPushButton *itemButton = new QPushButton(tr("QInputDialog::getIte&m()"));

         textLabel = new QLabel;
         textLabel->setFrameStyle(frameStyle);
         QPushButton *textButton = new QPushButton(tr("QInputDialog::get&Text()"));

         colorLabel = new QLabel;
         colorLabel->setFrameStyle(frameStyle);
         QPushButton *colorButton = new QPushButton(tr("QColorDialog::get&Color()"));

         fontLabel = new QLabel;
         fontLabel->setFrameStyle(frameStyle);
         QPushButton *fontButton = new QPushButton(tr("QFontDialog::get&Font()"));

         directoryLabel = new QLabel;
         directoryLabel->setFrameStyle(frameStyle);
         QPushButton *directoryButton =
                 new QPushButton(tr("QFileDialog::getE&xistingDirectory()"));

         openFileNameLabel = new QLabel;
         openFileNameLabel->setFrameStyle(frameStyle);
         QPushButton *openFileNameButton =
                 new QPushButton(tr("QFileDialog::get&OpenFileName()"));

         openFileNamesLabel = new QLabel;
         openFileNamesLabel->setFrameStyle(frameStyle);
         QPushButton *openFileNamesButton =
                 new QPushButton(tr("QFileDialog::&getOpenFileNames()"));

         saveFileNameLabel = new QLabel;
         saveFileNameLabel->setFrameStyle(frameStyle);
         QPushButton *saveFileNameButton =
                 new QPushButton(tr("QFileDialog::get&SaveFileName()"));

         criticalLabel = new QLabel;
         criticalLabel->setFrameStyle(frameStyle);
         QPushButton *criticalButton =
                 new QPushButton(tr("QMessageBox::critica&l()"));

         informationLabel = new QLabel;
         informationLabel->setFrameStyle(frameStyle);
         QPushButton *informationButton =
                 new QPushButton(tr("QMessageBox::i&nformation()"));

         questionLabel = new QLabel;
         questionLabel->setFrameStyle(frameStyle);
         QPushButton *questionButton =
                 new QPushButton(tr("QMessageBox::&question()"));

         warningLabel = new QLabel;
         warningLabel->setFrameStyle(frameStyle);
         QPushButton *warningButton = new QPushButton(tr("QMessageBox::&warning()"));

         errorLabel = new QLabel;
         errorLabel->setFrameStyle(frameStyle);
         QPushButton *errorButton =
                 new QPushButton(tr("QErrorMessage::show&M&essage()"));

         connect(integerButton, SIGNAL(clicked()), this, SLOT(setInteger()));
         connect(doubleButton, SIGNAL(clicked()), this, SLOT(setDouble()));
         connect(itemButton, SIGNAL(clicked()), this, SLOT(setItem()));
         connect(textButton, SIGNAL(clicked()), this, SLOT(setText()));
         connect(colorButton, SIGNAL(clicked()), this, SLOT(setColor()));
         connect(fontButton, SIGNAL(clicked()), this, SLOT(setFont()));
         connect(directoryButton, SIGNAL(clicked()),
                 this, SLOT(setExistingDirectory()));
         connect(openFileNameButton, SIGNAL(clicked()),
                 this, SLOT(setOpenFileName()));
         connect(openFileNamesButton, SIGNAL(clicked()),
                 this, SLOT(setOpenFileNames()));
         connect(saveFileNameButton, SIGNAL(clicked()),
                 this, SLOT(setSaveFileName()));
         connect(criticalButton, SIGNAL(clicked()), this, SLOT(criticalMessage()));
         connect(informationButton, SIGNAL(clicked()),
                 this, SLOT(informationMessage()));
         connect(questionButton, SIGNAL(clicked()), this, SLOT(questionMessage()));
         connect(warningButton, SIGNAL(clicked()), this, SLOT(warningMessage()));
         connect(errorButton, SIGNAL(clicked()), this, SLOT(errorMessage()));

         native = new QCheckBox(this);
         native->setText("Use native file dialog.");
         native->setChecked(true);
     #ifndef Q_WS_WIN
     #ifndef Q_OS_MAC
         native->hide();
     #endif
     #endif
         QGridLayout *layout = new QGridLayout;
         layout->setColumnStretch(1, 1);
         layout->setColumnMinimumWidth(1, 250);
         layout->addWidget(integerButton, 0, 0);
         layout->addWidget(integerLabel, 0, 1);
         layout->addWidget(doubleButton, 1, 0);
         layout->addWidget(doubleLabel, 1, 1);
         layout->addWidget(itemButton, 2, 0);
         layout->addWidget(itemLabel, 2, 1);
         layout->addWidget(textButton, 3, 0);
         layout->addWidget(textLabel, 3, 1);
         layout->addWidget(colorButton, 4, 0);
         layout->addWidget(colorLabel, 4, 1);
         layout->addWidget(fontButton, 5, 0);
         layout->addWidget(fontLabel, 5, 1);
         layout->addWidget(directoryButton, 6, 0);
         layout->addWidget(directoryLabel, 6, 1);
         layout->addWidget(openFileNameButton, 7, 0);
         layout->addWidget(openFileNameLabel, 7, 1);
         layout->addWidget(openFileNamesButton, 8, 0);
         layout->addWidget(openFileNamesLabel, 8, 1);
         layout->addWidget(saveFileNameButton, 9, 0);
         layout->addWidget(saveFileNameLabel, 9, 1);
         layout->addWidget(criticalButton, 10, 0);
         layout->addWidget(criticalLabel, 10, 1);
         layout->addWidget(informationButton, 11, 0);
         layout->addWidget(informationLabel, 11, 1);
         layout->addWidget(questionButton, 12, 0);
         layout->addWidget(questionLabel, 12, 1);
         layout->addWidget(warningButton, 13, 0);
         layout->addWidget(warningLabel, 13, 1);
         layout->addWidget(errorButton, 14, 0);
         layout->addWidget(errorLabel, 14, 1);
         layout->addWidget(native, 15, 0);
         setLayout(layout);

         setWindowTitle(tr("Standard Dialogs"));
     }

     void Dialog::setInteger()
     {
         bool ok;
         int i = QInputDialog::getInt(this, tr("QInputDialog::getInteger()"),
                                      tr("Percentage:"), 25, 0, 100, 1, &ok);
         if (ok)
             integerLabel->setText(tr("%1%").arg(i));
     }

     void Dialog::setDouble()
     {
         bool ok;
         double d = QInputDialog::getDouble(this, tr("QInputDialog::getDouble()"),
                                            tr("Amount:"), 37.56, -10000, 10000, 2, &ok);
         if (ok)
             doubleLabel->setText(QString("$%1").arg(d));
     }

     void Dialog::setItem()
     {
         QStringList items;
         items << tr("Spring") << tr("Summer") << tr("Fall") << tr("Winter");

         bool ok;
         QString item = QInputDialog::getItem(this, tr("QInputDialog::getItem()"),
                                              tr("Season:"), items, 0, false, &ok);
         if (ok && !item.isEmpty())
             itemLabel->setText(item);
     }

     void Dialog::setText()
     {
         bool ok;
         QString text = QInputDialog::getText(this, tr("QInputDialog::getText()"),
                                              tr("User name:"), QLineEdit::Normal,
                                              QDir::home().dirName(), &ok);
         if (ok && !text.isEmpty())
             textLabel->setText(text);
     }

     void Dialog::setColor()
     {
         QColor color = QColorDialog::getColor(Qt::green, this);
         if (color.isValid()) {
             colorLabel->setText(color.name());
             colorLabel->setPalette(QPalette(color));
             colorLabel->setAutoFillBackground(true);
         }
     }

     void Dialog::setFont()
     {
         bool ok;
         QFont font = QFontDialog::getFont(&ok, QFont(fontLabel->text()), this);
         if (ok) {
             fontLabel->setText(font.key());
             fontLabel->setFont(font);
         }
     }

     void Dialog::setExistingDirectory()
     {
         QFileDialog::Options options = QFileDialog::DontResolveSymlinks | QFileDialog::ShowDirsOnly;
         if (!native->isChecked())
             options |= QFileDialog::DontUseNativeDialog;
         QString directory = QFileDialog::getExistingDirectory(this,
                                     tr("QFileDialog::getExistingDirectory()"),
                                     directoryLabel->text(),
                                     options);
         if (!directory.isEmpty())
             directoryLabel->setText(directory);
     }

     void Dialog::setOpenFileName()
     {
         QFileDialog::Options options;
         if (!native->isChecked())
             options |= QFileDialog::DontUseNativeDialog;
         QString selectedFilter;
         QString fileName = QFileDialog::getOpenFileName(this,
                                     tr("QFileDialog::getOpenFileName()"),
                                     openFileNameLabel->text(),
                                     tr("All Files (*);;Text Files (*.txt)"),
                                     &selectedFilter,
                                     options);
         if (!fileName.isEmpty())
             openFileNameLabel->setText(fileName);
     }

     void Dialog::setOpenFileNames()
     {
         QFileDialog::Options options;
         if (!native->isChecked())
             options |= QFileDialog::DontUseNativeDialog;
         QString selectedFilter;
         QStringList files = QFileDialog::getOpenFileNames(
                                     this, tr("QFileDialog::getOpenFileNames()"),
                                     openFilesPath,
                                     tr("All Files (*);;Text Files (*.txt)"),
                                     &selectedFilter,
                                     options);
         if (files.count()) {
             openFilesPath = files[0];
             openFileNamesLabel->setText(QString("[%1]").arg(files.join(", ")));
         }
     }

     void Dialog::setSaveFileName()
     {
         QFileDialog::Options options;
         if (!native->isChecked())
             options |= QFileDialog::DontUseNativeDialog;
         QString selectedFilter;
         QString fileName = QFileDialog::getSaveFileName(this,
                                     tr("QFileDialog::getSaveFileName()"),
                                     saveFileNameLabel->text(),
                                     tr("All Files (*);;Text Files (*.txt)"),
                                     &selectedFilter,
                                     options);
         if (!fileName.isEmpty())
             saveFileNameLabel->setText(fileName);
     }

     void Dialog::criticalMessage()
     {
         QMessageBox::StandardButton reply;
         reply = QMessageBox::critical(this, tr("QMessageBox::critical()"),
                                         MESSAGE,
                                         QMessageBox::Abort | QMessageBox::Retry | QMessageBox::Ignore);
         if (reply == QMessageBox::Abort)
             criticalLabel->setText(tr("Abort"));
         else if (reply == QMessageBox::Retry)
             criticalLabel->setText(tr("Retry"));
         else
             criticalLabel->setText(tr("Ignore"));
     }

     void Dialog::informationMessage()
     {
         QMessageBox::StandardButton reply;
         reply = QMessageBox::information(this, tr("QMessageBox::information()"), MESSAGE);
         if (reply == QMessageBox::Ok)
             informationLabel->setText(tr("OK"));
         else
             informationLabel->setText(tr("Escape"));
     }

     void Dialog::questionMessage()
     {
         QMessageBox::StandardButton reply;
         reply = QMessageBox::question(this, tr("QMessageBox::question()"),
                                         MESSAGE,
                                         QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel);
         if (reply == QMessageBox::Yes)
             questionLabel->setText(tr("Yes"));
         else if (reply == QMessageBox::No)
             questionLabel->setText(tr("No"));
         else
             questionLabel->setText(tr("Cancel"));
     }

     void Dialog::warningMessage()
     {
         QMessageBox msgBox(QMessageBox::Warning, tr("QMessageBox::warning()"),
                            MESSAGE, 0, this);
         msgBox.addButton(tr("Save &Again"), QMessageBox::AcceptRole);
         msgBox.addButton(tr("&Continue"), QMessageBox::RejectRole);
         if (msgBox.exec() == QMessageBox::AcceptRole)
             warningLabel->setText(tr("Save Again"));
         else
             warningLabel->setText(tr("Continue"));

     }

     void Dialog::errorMessage()
     {
         errorMessageDialog->showMessage(
                 tr("This dialog shows and remembers error messages. "
                    "If the checkbox is checked (as it is by default), "
                    "the shown message will be shown again, "
                    "but if the user unchecks the box the message "
                    "will not appear again if QErrorMessage::showMessage() "
                    "is called with the same message."));
         errorLabel->setText(tr("If the box is unchecked, the message "
                                "won't appear again."));
     }