Qt 5.9 | Qt Designer Manual | Container Extension Example | multipagewidget.cpp Example File

Qt 5.9.2 Reference Documentation

# multipagewidget.cpp Example File

containerextension/multipagewidget.cpp

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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);
      }