Qt 5.11 | Qt Widgets | Settings Editor Example | locationdialog.cpp Example File

Qt 5.11.3 Reference Documentation

# locationdialog.cpp Example File

tools/settingseditor/locationdialog.cpp

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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);
      }