119 lines
4.5 KiB
C++
119 lines
4.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qinputdevicemanager_p.h"
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#include "qinputdevicemanager_p_p.h"
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QT_BEGIN_NAMESPACE
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/*!
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\class QInputDeviceManager
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\internal
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\brief QInputDeviceManager acts as a communication hub between QtGui and the input handlers.
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On embedded platforms the input handling code is either compiled into the platform
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plugin or is loaded dynamically as a generic plugin without any interface. The input
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handler in use may also change between each run (e.g. evdevmouse/keyboard/touch
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vs. libinput). QWindowSystemInterface is too limiting when Qt (the platform plugin) is
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acting as a windowing system, and is one way only.
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QInputDeviceManager solves this by providing a global object that is used to communicate
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from the input handlers to the rest of Qt (e.g. the number of connected mice, which may
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be important information for the cursor drawing code), and vice-versa (e.g. to indicate
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to the input handler that a manual cursor position change was requested by the
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application via QCursor::setPos and thus any internal state has to be updated accordingly).
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*/
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QInputDeviceManager::QInputDeviceManager(QObject *parent)
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: QObject(*new QInputDeviceManagerPrivate, parent)
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{
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qRegisterMetaType<DeviceType>();
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}
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int QInputDeviceManager::deviceCount(DeviceType type) const
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{
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Q_D(const QInputDeviceManager);
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return d->deviceCount(type);
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}
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int QInputDeviceManagerPrivate::deviceCount(QInputDeviceManager::DeviceType type) const
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{
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return m_deviceCount[type];
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}
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void QInputDeviceManagerPrivate::setDeviceCount(QInputDeviceManager::DeviceType type, int count)
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{
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Q_Q(QInputDeviceManager);
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if (m_deviceCount[type] != count) {
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m_deviceCount[type] = count;
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emit q->deviceListChanged(type);
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}
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}
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void QInputDeviceManager::setCursorPos(const QPoint &pos)
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{
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emit cursorPositionChangeRequested(pos);
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}
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/*!
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\return the keyboard modifier state stored in the QInputDeviceManager object.
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Keyboard input handlers are expected to keep this up-to-date via
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setKeyboardModifiers().
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Querying the state via this function (e.g. from a mouse handler that needs
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to include the modifier state in mouse events) is the preferred alternative
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over QGuiApplication::keyboardModifiers() since the latter may not report
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the current state due to asynchronous QPA event processing.
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*/
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Qt::KeyboardModifiers QInputDeviceManager::keyboardModifiers() const
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{
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Q_D(const QInputDeviceManager);
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return d->keyboardModifiers;
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}
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void QInputDeviceManager::setKeyboardModifiers(Qt::KeyboardModifiers mods)
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{
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Q_D(QInputDeviceManager);
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d->keyboardModifiers = mods;
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}
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QT_END_NAMESPACE
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