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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);
    }