| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtGui module 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. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include "qinputdevicemanager_p.h" |
| #include "qinputdevicemanager_p_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \class QInputDeviceManager |
| \internal |
| |
| \brief QInputDeviceManager acts as a communication hub between QtGui and the input handlers. |
| |
| On embedded platforms the input handling code is either compiled into the platform |
| plugin or is loaded dynamically as a generic plugin without any interface. The input |
| handler in use may also change between each run (e.g. evdevmouse/keyboard/touch |
| vs. libinput). QWindowSystemInterface is too limiting when Qt (the platform plugin) is |
| acting as a windowing system, and is one way only. |
| |
| QInputDeviceManager solves this by providing a global object that is used to communicate |
| from the input handlers to the rest of Qt (e.g. the number of connected mice, which may |
| be important information for the cursor drawing code), and vice-versa (e.g. to indicate |
| to the input handler that a manual cursor position change was requested by the |
| application via QCursor::setPos and thus any internal state has to be updated accordingly). |
| */ |
| |
| QInputDeviceManager::QInputDeviceManager(QObject *parent) |
| : QObject(*new QInputDeviceManagerPrivate, parent) |
| { |
| qRegisterMetaType<DeviceType>(); |
| } |
| |
| int QInputDeviceManager::deviceCount(DeviceType type) const |
| { |
| Q_D(const QInputDeviceManager); |
| return d->deviceCount(type); |
| } |
| |
| int QInputDeviceManagerPrivate::deviceCount(QInputDeviceManager::DeviceType type) const |
| { |
| return m_deviceCount[type]; |
| } |
| |
| void QInputDeviceManagerPrivate::setDeviceCount(QInputDeviceManager::DeviceType type, int count) |
| { |
| Q_Q(QInputDeviceManager); |
| if (m_deviceCount[type] != count) { |
| m_deviceCount[type] = count; |
| emit q->deviceListChanged(type); |
| } |
| } |
| |
| void QInputDeviceManager::setCursorPos(const QPoint &pos) |
| { |
| emit cursorPositionChangeRequested(pos); |
| } |
| |
| /*! |
| \return the keyboard modifier state stored in the QInputDeviceManager object. |
| |
| Keyboard input handlers are expected to keep this up-to-date via |
| setKeyboardModifiers(). |
| |
| Querying the state via this function (e.g. from a mouse handler that needs |
| to include the modifier state in mouse events) is the preferred alternative |
| over QGuiApplication::keyboardModifiers() since the latter may not report |
| the current state due to asynchronous QPA event processing. |
| */ |
| Qt::KeyboardModifiers QInputDeviceManager::keyboardModifiers() const |
| { |
| Q_D(const QInputDeviceManager); |
| return d->keyboardModifiers; |
| } |
| |
| void QInputDeviceManager::setKeyboardModifiers(Qt::KeyboardModifiers mods) |
| { |
| Q_D(QInputDeviceManager); |
| d->keyboardModifiers = mods; |
| } |
| |
| QT_END_NAMESPACE |