- Qt 5.5
- Qt Designer Manual
- Container Extension Example
- multipagewidget.cpp Example File
- Qt 5.5.1 Reference Documentation

# multipagewidget.cpp Example File

containerextension/multipagewidget.cpp

    /****************************************************************************
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    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
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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)
    {
        typedef void (QComboBox::*ComboBoxActivatedIntSignal)(int);

        comboBox->setObjectName("__qt__passive_comboBox");

        connect(comboBox, static_cast<ComboBoxActivatedIntSignal>(&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);
    }