dialog.cpp Example File

dialogs/standarddialogs/dialog.cpp
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#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)
    : QWidget(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::showM&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);

    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);
#if defined(Q_OS_SYMBIAN) || defined(Q_WS_MAEMO_5) || defined(Q_WS_SIMULATOR)
    QWidget *widget = new QWidget;
    widget->setLayout(layout);

    QScrollArea *scrollArea = new QScrollArea(this);
    scrollArea->setWidget(widget);

    QHBoxLayout *mainLayout = new QHBoxLayout;
    mainLayout->addWidget(scrollArea);
    setLayout(mainLayout);
#else
    setLayout(layout);
#endif

    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;
    if (native->isChecked())
        color = QColorDialog::getColor(Qt::green, this);
    else
        color = QColorDialog::getColor(Qt::green, this, "Select Color", QColorDialog::DontUseNativeDialog);

    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."));
}

© 2016 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.