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

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the documentation of the Qt Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QtGui>

    #include "dialog.h"

    #define MESSAGE \
        Dialog::tr("<p>Message boxes have a caption, a text, " \
                   "and up to three buttons, each with standard or custom texts." \
                   "<p>Click a button or press Esc.")

    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&Integer()"));

        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()));

        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);
        setLayout(layout);

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

    void Dialog::setInteger()
    {
        bool ok;
        int i = QInputDialog::getInteger(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));
        }
    }

    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()
    {
        QString directory = QFileDialog::getExistingDirectory(this,
                                    tr("QFileDialog::getExistingDirectory()"),
                                    directoryLabel->text(),
                                    QFileDialog::DontResolveSymlinks
                                    | QFileDialog::ShowDirsOnly);
        if (!directory.isEmpty())
            directoryLabel->setText(directory);
    }

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

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

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

    void Dialog::criticalMessage()
    {
        int reply = QMessageBox::critical(this, tr("QMessageBox::showCritical()"),
                                          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::information(this, tr("QMessageBox::showInformation()"), MESSAGE);
        informationLabel->setText(tr("Closed with OK or Esc"));
    }

    void Dialog::questionMessage()
    {
        int reply = QMessageBox::question(this, tr("QMessageBox::showQuestion()"),
                                          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()
    {
        int reply = QMessageBox::warning(this, tr("QMessageBox::showWarning()"),
                                         MESSAGE,
                                         tr("Save &Again"),
                                         tr("&Continue"));
        if (reply == 0)
            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."));
    }

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