locationdialog.cpp Example File

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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("QtProject"));
      organizationComboBox->setEditable(true);

      applicationComboBox = new QComboBox;
      applicationComboBox->addItem(tr("Any"));
      applicationComboBox->addItem(tr("Qt Creator"));
      applicationComboBox->addItem(tr("Application Example"));
      applicationComboBox->addItem(tr("Assistant"));
      applicationComboBox->addItem(tr("Designer"));
      applicationComboBox->addItem(tr("Linguist"));
      applicationComboBox->setEditable(true);
      applicationComboBox->setCurrentIndex(1);

      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);
      connect(locationsTable, &QTableWidget::itemActivated, this, &LocationDialog::itemActivated);

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

      connect(formatComboBox, QOverload<int>::of(&QComboBox::activated),
              this, &LocationDialog::updateLocationsTable);
      connect(scopeComboBox, QOverload<int>::of(&QComboBox::activated),
              this, &LocationDialog::updateLocationsTable);
      connect(organizationComboBox->lineEdit(),
              &QLineEdit::editingFinished,
              this, &LocationDialog::updateLocationsTable);
      connect(applicationComboBox->lineEdit(),
              &QLineEdit::editingFinished,
              this, &LocationDialog::updateLocationsTable);
      connect(applicationComboBox, QOverload<int>::of(&QComboBox::activated),
              this, &LocationDialog::updateLocationsTable);
      connect(buttonBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
      connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);

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

      QGridLayout *mainLayout = new QGridLayout(this);
      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);

      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 QString();
      else
          return applicationComboBox->currentText();
  }

  void LocationDialog::itemActivated(QTableWidgetItem *)
  {
      buttonBox->button(QDialogButtonBox::Ok)->animateClick();
  }

  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(QDir::toNativeSeparators(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);
  }