Basic foreign window support for QNX

Requires a screen with working context permission parsing.  Currently,
all context permission requests fail because the parsing is incorrect.
A context permission is added temporarily to prevent CLOSE/CREATE
events when Qt reparents foreign windows.  Qt does this temporarily
when a foreign window is wrapped in a widget.

Change-Id: I84c18e70d43239286fcd53715332d7015cf1a826
Reviewed-by: Rafael Roquetto <rafael@roquetto.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/examples/widgets/qnx/foreignwindows/collector.h b/examples/widgets/qnx/foreignwindows/collector.h
new file mode 100644
index 0000000000..2b1ed499ff
--- /dev/null
+++ b/examples/widgets/qnx/foreignwindows/collector.h
@@ -0,0 +1,75 @@
+/***************************************************************************
+**
+** Copyright (C) 2018 QNX Software Systems. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef COLLECTOR_H_
+#define COLLECTOR_H_
+
+#include <QAbstractNativeEventFilter>
+#include <QWidget>
+#include <QVector>
+
+#include <screen/screen.h>
+
+class Collector : public QWidget, public QAbstractNativeEventFilter
+{
+public:
+    explicit Collector(QWidget *parent = nullptr);
+    ~Collector() override;
+
+    bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) override;
+
+private:
+    struct Collectible
+    {
+        QWindow *window;
+        QWidget *widget;
+    };
+    QVector<Collectible> m_collectibles;
+
+    bool filterQnxScreenEvent(screen_event_t event);
+    bool filterQnxScreenWindowEvent(screen_event_t event);
+    bool filterQnxScreenWindowCreateEvent(screen_window_t window, screen_event_t event);
+    bool filterQnxScreenWindowCloseEvent(screen_window_t window, screen_event_t event);
+    bool filterQnxScreenWindowManagerEvent(screen_window_t window, screen_event_t event);
+    bool filterQnxScreenWindowManagerNameEvent(screen_window_t window,
+                                               screen_event_t event);
+};
+
+
+#endif /* COLLECTOR_H_ */