- Qt 5.5
- Qt WebEngine Widgets
- WebEngine Tab Browser Example
- featurepermissionbar.cpp Example File
- Qt 5.5.1 Reference Documentation

# featurepermissionbar.cpp Example File

browser/featurepermissionbar.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
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    ** This file is part of the demonstration applications of the Qt Toolkit.
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    ** packaging of this file. Please review the following information to
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    ** GNU General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU
    ** General Public License version 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file. Please review the following information to
    ** ensure the GNU General Public License version 3.0 requirements will be
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    #include "featurepermissionbar.h"

    #include <QLabel>
    #include <QPushButton>
    #include <QHBoxLayout>
    #include <QUrl>
    #include <QPropertyAnimation>

    static const int defaultHeight = 30;

    static QString textForPermissionType(QWebEnginePage::Feature type)
    {
        switch (type) {
        case QWebEnginePage::Notifications:
            return QObject::tr("use desktop notifications");
        case QWebEnginePage::Geolocation:
            return QObject::tr("use your position");
        case QWebEnginePage::MediaAudioCapture:
            return QObject::tr("use your microphone");
        case QWebEnginePage::MediaVideoCapture:
            return QObject::tr("use your camera");
        case QWebEnginePage::MediaAudioVideoCapture:
            return QObject::tr("use your camera and microphone");
        case QWebEnginePage::MouseLock:
            return QObject::tr("lock your mouse");
        default:
            Q_UNREACHABLE();
        }
        return QString();
    }

    FeaturePermissionBar::FeaturePermissionBar(QWidget *view)
        : QWidget(view)
        , m_messageLabel(new QLabel(this))
    {
        setAutoFillBackground(true);
        QHBoxLayout *l = new QHBoxLayout;
        setLayout(l);
        l->setContentsMargins(defaultHeight, 0, 0, 0);
        l->addWidget(m_messageLabel);
        l->addStretch();
        QPushButton *allowButton = new QPushButton(tr("Allow"), this);
        QPushButton *denyButton = new QPushButton(tr("Deny"), this);
        QPushButton *discardButton = new QPushButton(QIcon(QStringLiteral(":closetab.png")), QString(), this);
        connect(allowButton, &QPushButton::clicked, this, &FeaturePermissionBar::permissionGranted);
        connect(denyButton, &QPushButton::clicked, this, &FeaturePermissionBar::permissionDenied);
        connect(discardButton, &QPushButton::clicked, this, &FeaturePermissionBar::permissionUnknown);
        connect(allowButton, &QPushButton::clicked, this, &QObject::deleteLater);
        connect(denyButton, &QPushButton::clicked, this, &QObject::deleteLater);
        connect(discardButton, &QPushButton::clicked, this, &QObject::deleteLater);
        l->addWidget(denyButton);
        l->addWidget(allowButton);
        l->addWidget(discardButton);
        setGeometry(0, -defaultHeight, view->width(), defaultHeight);
    }

    void FeaturePermissionBar::requestPermission(const QUrl &securityOrigin, QWebEnginePage::Feature feature)
    {
        m_securityOrigin = securityOrigin;
        m_feature = feature;
        m_messageLabel->setText(tr("%1 wants to %2.").arg(securityOrigin.host()).arg(textForPermissionType(feature)));
        show();
        // Ease in
        QPropertyAnimation *animation = new QPropertyAnimation(this);
        animation->setTargetObject(this);
        animation->setPropertyName(QByteArrayLiteral("pos"));
        animation->setDuration(300);
        animation->setStartValue(QVariant::fromValue(pos()));
        animation->setEndValue(QVariant::fromValue(QPoint(0,0)));
        animation->setEasingCurve(QEasingCurve::InOutQuad);
        animation->start(QPropertyAnimation::DeleteWhenStopped);
    }

    void FeaturePermissionBar::permissionDenied()
    {
        emit featurePermissionProvided(m_securityOrigin, m_feature, QWebEnginePage::PermissionDeniedByUser);
    }

    void FeaturePermissionBar::permissionGranted()
    {
        emit featurePermissionProvided(m_securityOrigin, m_feature, QWebEnginePage::PermissionGrantedByUser);
    }

    void FeaturePermissionBar::permissionUnknown()
    {
        emit featurePermissionProvided(m_securityOrigin, m_feature, QWebEnginePage::PermissionUnknown);
    }