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# locationdialog.cpp Example File
tools/settingseditor/locationdialog.cpp

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 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 "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("Trolltech"));
            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::NoSelection);
            locationsTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
            locationsTable->setColumnCount(2);
            locationsTable->setHorizontalHeaderLabels(labels);
            locationsTable->horizontalHeader()->setResizeMode(0, QHeaderView::Stretch);
            locationsTable->horizontalHeader()->resizeSection(1, 180);

            okButton = new QPushButton(tr("OK"));
            cancelButton = new QPushButton(tr("Cancel"));
            okButton->setDefault(true);

            connect(formatComboBox, SIGNAL(activated(int)),
                    this, SLOT(updateLocationsTable()));
            connect(scopeComboBox, SIGNAL(activated(int)),
                    this, SLOT(updateLocationsTable()));
            connect(organizationComboBox, SIGNAL(editTextChanged(const QString &)),
                    this, SLOT(updateLocationsTable()));
            connect(applicationComboBox, SIGNAL(editTextChanged(const QString &)),
                    this, SLOT(updateLocationsTable()));
            connect(okButton, SIGNAL(clicked()), this, SLOT(accept()));
            connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));

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

            QHBoxLayout *buttonLayout = new QHBoxLayout;
            buttonLayout->addStretch(1);
            buttonLayout->addWidget(okButton);
            buttonLayout->addWidget(cancelButton);

            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->addLayout(buttonLayout, 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"));
                        }
                        okButton->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);
        }