Qt 5.11 | Qt WebEngine | WebEngine StyleSheet Browser Example | stylesheetdialog.cpp Example File

Qt 5.11.3 Reference Documentation

# stylesheetdialog.cpp Example File

webenginewidgets/stylesheetbrowser/stylesheetdialog.cpp

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      #include "mainwindow.h"
      #include "stylesheetdialog.h"
      #include "ui_stylesheetdialog.h"

      StylesheetDialog::StylesheetDialog(QWidget *parent) :
          QDialog(parent),
          ui(new Ui::StylesheetDialog)
      {
          ui->setupUi(this);

          connect(ui->styleSheetList, &QListWidget::currentItemChanged, this, &StylesheetDialog::currentStyleSheetChanged);
          connect(ui->styleSheetList, &QListWidget::itemClicked, this, &StylesheetDialog::listItemClicked);
          connect(ui->fileNameEdit, &QLineEdit::textChanged, this, &StylesheetDialog::fileNameChanged);

          connect(ui->addButton, &QPushButton::clicked, this, &StylesheetDialog::addButtonClicked);
          connect(ui->removeButton, &QPushButton::clicked, this, &StylesheetDialog::removeButtonClicked);

          QSettings settings;
          settings.beginGroup("styleSheets");
          for (auto name : settings.allKeys()) {
              QListWidgetItem *listItem = new QListWidgetItem(name,  ui->styleSheetList);
              listItem->setFlags(listItem->flags() | Qt::ItemIsUserCheckable);
              bool checked = settings.value(name).value<StyleSheet>().second;
              listItem->setCheckState(checked ? Qt::Checked : Qt::Unchecked);
          }
          settings.endGroup();
      }

      StylesheetDialog::~StylesheetDialog()
      {
          delete ui;
      }

      void StylesheetDialog::currentStyleSheetChanged(QListWidgetItem *current, QListWidgetItem *previous)
      {
          if (!previous) {
              // Select the first item on startup
              ui->styleSheetList->setCurrentItem(current);
          }

          if (!current) {
              ui->fileNameEdit->setText(QString());
              ui->sourceCodeEdit->setPlainText(QString());
              return;
          }

          QSettings settings;
          settings.beginGroup("styleSheets");
          ui->fileNameEdit->setText(current->text());
          const QString source = settings.value(current->text()).value<StyleSheet>().first;
          ui->sourceCodeEdit->setPlainText(source);
          settings.endGroup();
      }

      void StylesheetDialog::listItemClicked(QListWidgetItem *item)
      {
          MainWindow *window = static_cast<MainWindow *>(parent());
          const QString name = item->text();
          bool checkedStateChanged =
                  (item->checkState() == Qt::Checked && !window->hasStyleSheet(name)) ||
                  (item->checkState() == Qt::Unchecked && window->hasStyleSheet(name));
          if (!checkedStateChanged)
              return;

          QSettings settings;
          settings.beginGroup("styleSheets");
          const QString source = settings.value(name).value<StyleSheet>().first;

          if (item->checkState() == Qt::Checked) {
              settings.setValue(name, QVariant::fromValue(qMakePair(source, true)));
              window->insertStyleSheet(name, source, true);
          } else {
              settings.setValue(name, QVariant::fromValue(qMakePair(source, false)));
              window->removeStyleSheet(name, true);
          }

          settings.endGroup();
      }

      void StylesheetDialog::fileNameChanged(const QString &text)
      {
          QList<QListWidgetItem *> items = ui->styleSheetList->findItems(text, Qt::MatchFixedString);
          if (items.size())
              ui->addButton->setEnabled(false);
          else
              ui->addButton->setEnabled(true);
      }

      void StylesheetDialog::addButtonClicked()
      {
          const QString name = ui->fileNameEdit->text();
          const QString source = ui->sourceCodeEdit->toPlainText();
          if (name.isEmpty() || source.isEmpty())
              return;

          QListWidgetItem *listItem = new QListWidgetItem(ui->fileNameEdit->text(),  ui->styleSheetList);
          listItem->setFlags(listItem->flags() | Qt::ItemIsUserCheckable);
          listItem->setCheckState(Qt::Checked);

          MainWindow *window = static_cast<MainWindow *>(parent());
          window->insertStyleSheet(name, source, true);

          QSettings settings;
          settings.beginGroup("styleSheets");
          settings.setValue(name, QVariant::fromValue(qMakePair(source, true)));
          settings.endGroup();

          ui->addButton->setEnabled(false);
      }

      void StylesheetDialog::removeButtonClicked()
      {
          if (ui->styleSheetList->selectedItems().isEmpty())
              return;

          MainWindow *window = static_cast<MainWindow *>(parent());
          QSettings settings;
          settings.beginGroup("styleSheets");

          QListWidgetItem *item = ui->styleSheetList->selectedItems().first();
          const QString name = item->text();
          window->removeStyleSheet(name, true);
          settings.remove(name);
          delete item;

          settings.endGroup();
      }