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# multipagewidget.cpp Example File
designer/containerextension/multipagewidget.cpp

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        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
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        ** and appearing in the file LICENSE.GPL included in the packaging of
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        #include <QtGui>

        #include "multipagewidget.h"

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

            connect(comboBox, SIGNAL(activated(int)),
                    this, SLOT(setCurrentIndex(int)));

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

        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);
            }
            comboBox->insertItem(index, title);
        }

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

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

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

        void MultiPageWidget::setPageTitle(QString const &newTitle)
        {
            comboBox->setItemText(currentIndex(), newTitle);
            stackWidget->currentWidget()->setWindowTitle(newTitle);
            emit pageTitleChanged(newTitle);
        }