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+/****************************************************************************
+**
+** 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 "qiosglobal.h"
+#include "qiosinputcontext.h"
+#include "qioswindow.h"
+#include <QGuiApplication>
+
+@interface QIOSKeyboardListener : NSObject {
+@public
+ QIOSInputContext *m_context;
+ BOOL m_keyboardVisible;
+ QRectF m_keyboardRect;
+}
+@end
+
+@implementation QIOSKeyboardListener
+
+- (id)initWithQIOSInputContext:(QIOSInputContext *)context
+{
+ self = [super init];
+ if (self) {
+ m_context = context;
+ m_keyboardVisible = NO;
+ // After the keyboard became undockable (iOS5), UIKeyboardWillShow/UIKeyboardWillHide
+ // no longer works for all cases. So listen to keyboard frame changes instead:
+ [[NSNotificationCenter defaultCenter]
+ addObserver:self
+ selector:@selector(keyboardDidChangeFrame:)
+ name:@"UIKeyboardDidChangeFrameNotification" object:nil];
+ }
+ return self;
+}
+
+- (void) dealloc
+{
+ [[NSNotificationCenter defaultCenter]
+ removeObserver:self
+ name:@"UIKeyboardDidChangeFrameNotification" object:nil];
+ [super dealloc];
+}
+
+- (void) keyboardDidChangeFrame:(NSNotification *)notification
+{
+ CGRect frame;
+ [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&frame];
+
+ m_keyboardRect = fromPortraitToPrimary(fromCGRect(frame), QGuiApplication::primaryScreen()->handle());
+ m_context->emitKeyboardRectChanged();
+
+ BOOL visible = CGRectIntersectsRect(frame, [UIScreen mainScreen].bounds);
+ if (m_keyboardVisible != visible) {
+ m_keyboardVisible = visible;
+ m_context->emitInputPanelVisibleChanged();
+ }
+}
+
+@end
+
+QIOSInputContext::QIOSInputContext()
+ : QPlatformInputContext()
+ , m_keyboardListener([[QIOSKeyboardListener alloc] initWithQIOSInputContext:this])
+ , m_focusView(0)
+{
+}
+
+QIOSInputContext::~QIOSInputContext()
+{
+ [m_keyboardListener release];
+ [m_focusView release];
+}
+
+QRectF QIOSInputContext::keyboardRect() const
+{
+ return m_keyboardListener->m_keyboardRect;
+}
+
+void QIOSInputContext::showInputPanel()
+{
+ // Documentation tells that one should call (and recall, if necessary) becomeFirstResponder/resignFirstResponder
+ // to show/hide the keyboard. This is slightly inconvenient, since there exist no API to get the current first
+ // responder. Rather than searching for it from the top, we let the active QIOSWindow tell us which view to use.
+ // Note that Qt will forward keyevents to whichever QObject that needs it, regardless of which UIView the input
+ // actually came from. So in this respect, we're undermining iOS' responder chain.
+ [m_focusView becomeFirstResponder];
+}
+
+void QIOSInputContext::hideInputPanel()
+{
+ [m_focusView resignFirstResponder];
+}
+
+bool QIOSInputContext::isInputPanelVisible() const
+{
+ return m_keyboardListener->m_keyboardVisible;
+}
+
+void QIOSInputContext::focusViewChanged(UIView *view)
+{
+ if ([m_focusView isFirstResponder])
+ [view becomeFirstResponder];
+ [m_focusView release];
+ m_focusView = [view retain];
+}