iOS: add QIOSOrientationListener

QIOSScreen will use this to listen for orientation
changes from UIDevice.

Change-Id: I5a30f3808f8b9b885303608ce2fc1316c962898b
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/src/plugins/platforms/ios/qiosorientationlistener.mm b/src/plugins/platforms/ios/qiosorientationlistener.mm
new file mode 100644
index 0000000000..626e43129b
--- /dev/null
+++ b/src/plugins/platforms/ios/qiosorientationlistener.mm
@@ -0,0 +1,108 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** 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
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qiosorientationlistener.h"
+#include "qiosscreen.h"
+#include <qpa/qwindowsysteminterface.h>
+
+QT_BEGIN_NAMESPACE
+
+Qt::ScreenOrientation convertToQtOrientation(UIDeviceOrientation uiDeviceOrientation)
+{
+    Qt::ScreenOrientation qtOrientation;
+    switch (uiDeviceOrientation) {
+        case UIDeviceOrientationPortraitUpsideDown:
+            qtOrientation = Qt::InvertedPortraitOrientation;
+            break;
+        case UIDeviceOrientationLandscapeLeft:
+           qtOrientation = Qt::InvertedLandscapeOrientation;
+            break;
+        case UIDeviceOrientationLandscapeRight:
+            qtOrientation = Qt::LandscapeOrientation;
+            break;
+        case UIDeviceOrientationFaceUp:
+        case UIDeviceOrientationFaceDown:
+            qtOrientation = static_cast<Qt::ScreenOrientation>(-1); // not supported ATM.
+            break;
+        default:
+            qtOrientation = Qt::PortraitOrientation;
+            break;
+    }
+    return qtOrientation;
+}
+
+QT_END_NAMESPACE
+
+@implementation QIOSOrientationListener
+
+- (id) initWithQIOSScreen:(QIOSScreen *)screen
+{
+    self = [super init];
+    if (self) {
+        m_screen = screen;
+        m_orientation = convertToQtOrientation([UIDevice currentDevice].orientation);
+        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
+        [[NSNotificationCenter defaultCenter]
+            addObserver:self
+            selector:@selector(orientationChanged:)
+            name:@"UIDeviceOrientationDidChangeNotification" object:nil];
+    }
+    return self;
+}
+
+- (void) dealloc
+{
+    [[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];
+    [super dealloc];
+}
+
+- (void) orientationChanged:(NSNotification *)notification
+{
+    Q_UNUSED(notification);
+    Qt::ScreenOrientation qtOrientation = convertToQtOrientation([UIDevice currentDevice].orientation);
+    if (qtOrientation != -1) {
+        m_orientation = qtOrientation;
+        QWindowSystemInterface::handleScreenOrientationChange(m_screen->screen(), m_orientation);
+    }
+}
+
+@end
+