multipagewidget.cpp Example File

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  #include <QComboBox>
  #include <QVBoxLayout>
  #include <QStackedWidget>

  #include "multipagewidget.h"

  MultiPageWidget::MultiPageWidget(QWidget *parent)
      : QWidget(parent)
      , stackWidget(new QStackedWidget)
      , comboBox(new QComboBox)
  {
      comboBox->setObjectName(QStringLiteral("__qt__passive_comboBox"));

      connect(comboBox, QOverload<int>::of(&QComboBox::activated),
              this, &MultiPageWidget::setCurrentIndex);

      QVBoxLayout *layout = new QVBoxLayout(this);
      layout->addWidget(comboBox);
      layout->addWidget(stackWidget);
  }

  QSize MultiPageWidget::sizeHint() const
  {
      return QSize(200, 150);
  }

  void MultiPageWidget::addPage(QWidget *page)
  {
      insertPage(count(), page);
  }

  void MultiPageWidget::removePage(int index)
  {
      QWidget *widget = stackWidget->widget(index);
      stackWidget->removeWidget(widget);

      comboBox->removeItem(index);
  }

  int MultiPageWidget::count() const
  {
      return stackWidget->count();
  }

  int MultiPageWidget::currentIndex() const
  {
      return stackWidget->currentIndex();
  }

  void MultiPageWidget::insertPage(int index, QWidget *page)
  {
      page->setParent(stackWidget);

      stackWidget->insertWidget(index, page);

      QString title = page->windowTitle();
      if (title.isEmpty()) {
          title = tr("Page %1").arg(comboBox->count() + 1);
          page->setWindowTitle(title);
      }
      connect(page, &QWidget::windowTitleChanged,
              this, &MultiPageWidget::pageWindowTitleChanged);
      comboBox->insertItem(index, title);
  }

  void MultiPageWidget::setCurrentIndex(int index)
  {
      if (index != currentIndex()) {
          stackWidget->setCurrentIndex(index);
          comboBox->setCurrentIndex(index);
          emit currentIndexChanged(index);
      }
  }

  void MultiPageWidget::pageWindowTitleChanged()
  {
      QWidget *page = qobject_cast<QWidget *>(sender());
      const int index = stackWidget->indexOf(page);
      comboBox->setItemText(index, page->windowTitle());
  }

  QWidget* MultiPageWidget::widget(int index)
  {
      return stackWidget->widget(index);
  }

  QString MultiPageWidget::pageTitle() const
  {
      if (const QWidget *currentWidget = stackWidget->currentWidget())
          return currentWidget->windowTitle();
      return QString();
  }

  void MultiPageWidget::setPageTitle(QString const &newTitle)
  {
      if (QWidget *currentWidget = stackWidget->currentWidget())
          currentWidget->setWindowTitle(newTitle);
      emit pageTitleChanged(newTitle);
  }