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Diffstat (limited to 'src/plugins/platforms/ios/qiosinputcontext.mm')
-rw-r--r-- | src/plugins/platforms/ios/qiosinputcontext.mm | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/plugins/platforms/ios/qiosinputcontext.mm b/src/plugins/platforms/ios/qiosinputcontext.mm new file mode 100644 index 0000000000..7937337e4a --- /dev/null +++ b/src/plugins/platforms/ios/qiosinputcontext.mm @@ -0,0 +1,134 @@ +/**************************************************************************** +** +** 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 "qiosinputcontext.h" +#include "qioswindow.h" +#include <QGuiApplication> + +@interface QIOSKeyboardListener : NSObject { +@public + QIOSInputContext *m_context; + BOOL m_keyboardVisible; +} +@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]; + 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]) +{ +} + +QIOSInputContext::~QIOSInputContext() +{ + [m_keyboardListener release]; +} + +void QIOSInputContext::showInputPanel() +{ + if (isInputPanelVisible()) + return; + + // 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 assume that the view backing the focus window in Qt + // is the best candidate as long as there exist no first responder from before (which the isInputPanelVisible + // test on top should catch). 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. + if (QWindow *window = QGuiApplication::focusWindow()) { + QIOSWindow *qiosWindow = static_cast<QIOSWindow *>(window->handle()); + [qiosWindow->nativeView() becomeFirstResponder]; + } +} + +void QIOSInputContext::hideInputPanel() +{ + if (!isInputPanelVisible()) + return; + + if (QWindow *window = QGuiApplication::focusWindow()) { + QIOSWindow *qiosWindow = static_cast<QIOSWindow *>(window->handle()); + [qiosWindow->nativeView() resignFirstResponder]; + } +} + +bool QIOSInputContext::isInputPanelVisible() const +{ + return m_keyboardListener->m_keyboardVisible; +} |