Create example for full screen feature in WebEngine

Adds an example ('videoplayer') showing how to enable the Fullscreen
API[1] in QWebEngineView. This is one of the missing examples blocking
the removal of demobrowser.

[1]: https://fullscreen.spec.whatwg.org

Task-number: QTBUG-59820
Change-Id: Ib02a1556515d87e595ca54c2bce18c9144030fbc
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Michal Klocek <michal.klocek@qt.io>

1 files changed, 72 insertions, 0 deletions

diff --git a/examples/webenginewidgets/videoplayer/mainwindow.cpp b/examples/webenginewidgets/videoplayer/mainwindow.cpp
new file mode 100644
index 000000000..55885e0c5
--- /dev/null
+++ b/examples/webenginewidgets/videoplayer/mainwindow.cpp
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "mainwindow.h"
+
+#include <QWebEngineView>
+#include <QWebEngineSettings>
+#include <QWebEngineFullScreenRequest>
+
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
+    , m_view(new QWebEngineView(this))
+{
+    setCentralWidget(m_view);
+    m_view->settings()->setAttribute(QWebEngineSettings::FullScreenSupportEnabled, true);
+    connect(m_view->page(),
+            &QWebEnginePage::fullScreenRequested,
+            this,
+            &MainWindow::fullScreenRequested);
+    m_view->load(QUrl(QStringLiteral("qrc:/index.html")));
+}
+
+void MainWindow::fullScreenRequested(QWebEngineFullScreenRequest request)
+{
+    if (request.toggleOn()) {
+        if (m_fullScreenWindow)
+            return;
+        request.accept();
+        m_fullScreenWindow.reset(new FullScreenWindow(m_view));
+    } else {
+        if (!m_fullScreenWindow)
+            return;
+        request.accept();
+        m_fullScreenWindow.reset();
+    }
+}