1/****************************************************************************
2**
3** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the Qt3D module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#include "keyboardhandler_p.h"
41
42#include <Qt3DInput/qkeyboarddevice.h>
43#include <Qt3DInput/qkeyboardhandler.h>
44#include <QtCore/QVariant>
45
46#include <Qt3DInput/private/inputhandler_p.h>
47#include <Qt3DInput/private/inputmanagers_p.h>
48#include <Qt3DInput/private/qkeyboardhandler_p.h>
49
50QT_BEGIN_NAMESPACE
51
52using namespace Qt3DCore;
53
54namespace Qt3DInput {
55namespace Input {
56
57KeyboardHandler::KeyboardHandler()
58 : BackendNode(QBackendNode::ReadWrite)
59 , m_inputHandler(nullptr)
60 , m_focus(false)
61{
62}
63
64Qt3DCore::QNodeId KeyboardHandler::keyboardDevice() const
65{
66 return m_keyboardDevice;
67}
68
69void KeyboardHandler::setInputHandler(InputHandler *handler)
70{
71 m_inputHandler = handler;
72}
73
74// Called by the KeyboadDevice when the focus for the KeyboardHandler has changed
75// Sends a change notification so that the frontend can update itself
76void KeyboardHandler::setFocus(bool focus)
77{
78 if (focus != m_focus)
79 m_focus = focus;
80}
81
82void KeyboardHandler::syncFromFrontEnd(const Qt3DCore::QNode *frontEnd, bool firstTime)
83{
84 BackendNode::syncFromFrontEnd(frontEnd, firstTime);
85 const Qt3DInput::QKeyboardHandler *node = qobject_cast<const Qt3DInput::QKeyboardHandler *>(object: frontEnd);
86 if (!node)
87 return;
88
89 if (firstTime)
90 m_focus = false;
91
92 bool focusRequest = false;
93 auto id = Qt3DCore::qIdForNode(node: node->sourceDevice());
94 if (m_keyboardDevice != id) {
95 setSourcerDevice(id);
96 focusRequest = m_focus;
97 }
98
99 if (m_focus != node->focus())
100 focusRequest = node->focus();
101
102 if (focusRequest)
103 requestFocus();
104}
105
106void KeyboardHandler::requestFocus()
107{
108 KeyboardDevice *keyboardDevice = m_inputHandler->keyboardDeviceManager()->lookupResource(id: m_keyboardDevice);
109 if (keyboardDevice && isEnabled())
110 keyboardDevice->requestFocusForInput(inputId: peerId());
111}
112
113void KeyboardHandler::setSourcerDevice(QNodeId device)
114{
115 m_keyboardDevice = device;
116}
117
118KeyboardHandlerFunctor::KeyboardHandlerFunctor(InputHandler *handler)
119 : m_handler(handler)
120{
121}
122
123Qt3DCore::QBackendNode *KeyboardHandlerFunctor::create(const Qt3DCore::QNodeCreatedChangeBasePtr &change) const
124{
125 KeyboardHandler *input = m_handler->keyboardInputManager()->getOrCreateResource(id: change->subjectId());
126 input->setInputHandler(m_handler);
127 return input;
128}
129
130QBackendNode *KeyboardHandlerFunctor::get(QNodeId id) const
131{
132 return m_handler->keyboardInputManager()->lookupResource(id);
133}
134
135void KeyboardHandlerFunctor::destroy(QNodeId id) const
136{
137 m_handler->keyboardInputManager()->releaseResource(id);
138}
139
140} // namespace Input
141} // namespace Qt3DInput
142
143QT_END_NAMESPACE
144

source code of qt3d/src/input/backend/keyboardhandler.cpp