- Qt 5.5
- Qt Widgets
- Settings Editor Example
- locationdialog.cpp Example File
- Qt 5.5.1 Reference Documentation

# locationdialog.cpp Example File

tools/settingseditor/locationdialog.cpp

    /****************************************************************************
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    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
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    ** This file is part of the examples of the Qt Toolkit.
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    ** $QT_BEGIN_LICENSE:BSD$
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    #include <QtWidgets>

    #include "locationdialog.h"

    LocationDialog::LocationDialog(QWidget *parent)
        : QDialog(parent)
    {
        formatComboBox = new QComboBox;
        formatComboBox->addItem(tr("Native"));
        formatComboBox->addItem(tr("INI"));

        scopeComboBox = new QComboBox;
        scopeComboBox->addItem(tr("User"));
        scopeComboBox->addItem(tr("System"));

        organizationComboBox = new QComboBox;
        organizationComboBox->addItem(tr("Qt"));
        organizationComboBox->setEditable(true);

        applicationComboBox = new QComboBox;
        applicationComboBox->addItem(tr("Any"));
        applicationComboBox->addItem(tr("Application Example"));
        applicationComboBox->addItem(tr("Assistant"));
        applicationComboBox->addItem(tr("Designer"));
        applicationComboBox->addItem(tr("Linguist"));
        applicationComboBox->setEditable(true);
        applicationComboBox->setCurrentIndex(3);

        formatLabel = new QLabel(tr("&Format:"));
        formatLabel->setBuddy(formatComboBox);

        scopeLabel = new QLabel(tr("&Scope:"));
        scopeLabel->setBuddy(scopeComboBox);

        organizationLabel = new QLabel(tr("&Organization:"));
        organizationLabel->setBuddy(organizationComboBox);

        applicationLabel = new QLabel(tr("&Application:"));
        applicationLabel->setBuddy(applicationComboBox);

        locationsGroupBox = new QGroupBox(tr("Setting Locations"));

        QStringList labels;
        labels << tr("Location") << tr("Access");

        locationsTable = new QTableWidget;
        locationsTable->setSelectionMode(QAbstractItemView::SingleSelection);
        locationsTable->setSelectionBehavior(QAbstractItemView::SelectRows);
        locationsTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
        locationsTable->setColumnCount(2);
        locationsTable->setHorizontalHeaderLabels(labels);
        locationsTable->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Stretch);
        locationsTable->horizontalHeader()->resizeSection(1, 180);

        buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                         | QDialogButtonBox::Cancel);

        connect(formatComboBox, SIGNAL(activated(int)),
                this, SLOT(updateLocationsTable()));
        connect(scopeComboBox, SIGNAL(activated(int)),
                this, SLOT(updateLocationsTable()));
        connect(organizationComboBox->lineEdit(),
                SIGNAL(editingFinished()),
                this, SLOT(updateLocationsTable()));
        connect(applicationComboBox->lineEdit(),
                SIGNAL(editingFinished()),
                this, SLOT(updateLocationsTable()));
        connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
        connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

        QVBoxLayout *locationsLayout = new QVBoxLayout;
        locationsLayout->addWidget(locationsTable);
        locationsGroupBox->setLayout(locationsLayout);

        QGridLayout *mainLayout = new QGridLayout;
        mainLayout->addWidget(formatLabel, 0, 0);
        mainLayout->addWidget(formatComboBox, 0, 1);
        mainLayout->addWidget(scopeLabel, 1, 0);
        mainLayout->addWidget(scopeComboBox, 1, 1);
        mainLayout->addWidget(organizationLabel, 2, 0);
        mainLayout->addWidget(organizationComboBox, 2, 1);
        mainLayout->addWidget(applicationLabel, 3, 0);
        mainLayout->addWidget(applicationComboBox, 3, 1);
        mainLayout->addWidget(locationsGroupBox, 4, 0, 1, 2);
        mainLayout->addWidget(buttonBox, 5, 0, 1, 2);
        setLayout(mainLayout);

        updateLocationsTable();

        setWindowTitle(tr("Open Application Settings"));
        resize(650, 400);
    }

    QSettings::Format LocationDialog::format() const
    {
        if (formatComboBox->currentIndex() == 0)
            return QSettings::NativeFormat;
        else
            return QSettings::IniFormat;
    }

    QSettings::Scope LocationDialog::scope() const
    {
        if (scopeComboBox->currentIndex() == 0)
            return QSettings::UserScope;
        else
            return QSettings::SystemScope;
    }

    QString LocationDialog::organization() const
    {
        return organizationComboBox->currentText();
    }

    QString LocationDialog::application() const
    {
        if (applicationComboBox->currentText() == tr("Any"))
            return "";
        else
            return applicationComboBox->currentText();
    }

    void LocationDialog::updateLocationsTable()
    {
        locationsTable->setUpdatesEnabled(false);
        locationsTable->setRowCount(0);

        for (int i = 0; i < 2; ++i) {
            if (i == 0 && scope() == QSettings::SystemScope)
                continue;

            QSettings::Scope actualScope = (i == 0) ? QSettings::UserScope
                                                    : QSettings::SystemScope;
            for (int j = 0; j < 2; ++j) {
                if (j == 0 && application().isEmpty())
                    continue;

                QString actualApplication;
                if (j == 0)
                    actualApplication = application();
                QSettings settings(format(), actualScope, organization(),
                                   actualApplication);

                int row = locationsTable->rowCount();
                locationsTable->setRowCount(row + 1);

                QTableWidgetItem *item0 = new QTableWidgetItem;
                item0->setText(settings.fileName());

                QTableWidgetItem *item1 = new QTableWidgetItem;
                bool disable = (settings.childKeys().isEmpty()
                                && settings.childGroups().isEmpty());

                if (row == 0) {
                    if (settings.isWritable()) {
                        item1->setText(tr("Read-write"));
                        disable = false;
                    } else {
                        item1->setText(tr("Read-only"));
                    }
                    buttonBox->button(QDialogButtonBox::Ok)->setDisabled(disable);
                } else {
                    item1->setText(tr("Read-only fallback"));
                }

                if (disable) {
                    item0->setFlags(item0->flags() & ~Qt::ItemIsEnabled);
                    item1->setFlags(item1->flags() & ~Qt::ItemIsEnabled);
                }

                locationsTable->setItem(row, 0, item0);
                locationsTable->setItem(row, 1, item1);
            }
        }
        locationsTable->setUpdatesEnabled(true);
    }