Qt 4.8: locationdialog.cpp Example File (tools/settingseditor/locationdialog.cpp)

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# locationdialog.cpp Example File

tools/settingseditor/locationdialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
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     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     #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::SingleSelection);
         locationsTable->setSelectionBehavior(QAbstractItemView::SelectRows);
         locationsTable->setEditTriggers(QAbstractItemView::NoEditTriggers);
         locationsTable->setColumnCount(2);
         locationsTable->setHorizontalHeaderLabels(labels);
         locationsTable->horizontalHeader()->setResizeMode(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);
     }