1 /*
2 * Copyright (C) 2019 Damir Porobic <damir.porobic@gmx.com>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "KeySequenceLineEdit.h"
21
KeySequenceLineEdit(QWidget * widget,const QList<Qt::Key> & allowedKeys)22 KeySequenceLineEdit::KeySequenceLineEdit(QWidget *widget, const QList<Qt::Key> &allowedKeys) : QLineEdit(widget)
23 {
24 mAllowedKeys = allowedKeys;
25 }
26
~KeySequenceLineEdit()27 KeySequenceLineEdit::~KeySequenceLineEdit()
28 {
29 mSpecialKeyFilters.clear();
30 }
31
keyPressEvent(QKeyEvent * event)32 void KeySequenceLineEdit::keyPressEvent(QKeyEvent *event)
33 {
34 mModifiers = event->modifiers();
35 mKey = getAllowedKey(event);
36 updateKeySequence();
37 }
38
getAllowedKey(const QKeyEvent * event) const39 Qt::Key KeySequenceLineEdit::getAllowedKey(const QKeyEvent *event) const
40 {
41 return mAllowedKeys.contains(static_cast<Qt::Key>(event->key())) ? static_cast<Qt::Key>(event->key()) : Qt::Key_unknown;
42 }
43
updateKeySequence()44 void KeySequenceLineEdit::updateKeySequence()
45 {
46 mKeySequence = mKey == Qt::Key_unknown ? QKeySequence(mModifiers) : QKeySequence(mModifiers + mKey);
47 updateText();
48 }
49
keyReleaseEvent(QKeyEvent * event)50 void KeySequenceLineEdit::keyReleaseEvent(QKeyEvent *event)
51 {
52 mModifiers = Qt::NoModifier;
53 mKey = Qt::Key_unknown;
54 QWidget::keyReleaseEvent(event);
55 }
56
updateText()57 void KeySequenceLineEdit::updateText()
58 {
59 setText(mKeySequence.toString());
60 }
61
value() const62 QKeySequence KeySequenceLineEdit::value() const
63 {
64 return mKeySequence;
65 }
66
clear()67 void KeySequenceLineEdit::clear()
68 {
69 mKeySequence = QKeySequence();
70 updateText();
71 }
72
setValue(const QKeySequence & keySequence)73 void KeySequenceLineEdit::setValue(const QKeySequence &keySequence)
74 {
75 mKeySequence = keySequence;
76 updateText();
77 }
78
focusInEvent(QFocusEvent * event)79 void KeySequenceLineEdit::focusInEvent(QFocusEvent *event)
80 {
81 setupSpecialKeyHandling();
82 QLineEdit::focusInEvent(event);
83 }
84
focusOutEvent(QFocusEvent * event)85 void KeySequenceLineEdit::focusOutEvent(QFocusEvent *event)
86 {
87 removeSpecialKeyHandler();
88 QLineEdit::focusOutEvent(event);
89 }
90
removeSpecialKeyHandler()91 void KeySequenceLineEdit::removeSpecialKeyHandler()
92 {
93 for(const auto& keyFilter : mSpecialKeyFilters) {
94 QApplication::instance()->removeNativeEventFilter(keyFilter.data());
95 }
96 mSpecialKeyFilters.clear();
97 }
98
keyPressed(Qt::Key key)99 void KeySequenceLineEdit::keyPressed(Qt::Key key)
100 {
101 mKey = key;
102 updateKeySequence();
103 }
104
setupSpecialKeyHandling()105 void KeySequenceLineEdit::setupSpecialKeyHandling()
106 {
107 addSpecialKeyHandler(Qt::Key_Print, Qt::Key_Print);
108 addSpecialKeyHandler(Qt::CTRL + Qt::Key_Print, Qt::Key_Print);
109 addSpecialKeyHandler(Qt::ALT + Qt::Key_Print, Qt::Key_Print);
110 addSpecialKeyHandler(Qt::SHIFT + Qt::Key_Print, Qt::Key_Print);
111 addSpecialKeyHandler(Qt::CTRL + Qt::ALT + Qt::Key_Print, Qt::Key_Print);
112 addSpecialKeyHandler(Qt::CTRL + Qt::SHIFT + Qt::Key_Print, Qt::Key_Print);
113 addSpecialKeyHandler(Qt::ALT + Qt::SHIFT + Qt::Key_Print, Qt::Key_Print);
114 addSpecialKeyHandler(Qt::CTRL + Qt::ALT + Qt::SHIFT + Qt::Key_Print, Qt::Key_Print);
115 }
116
addSpecialKeyHandler(const QKeySequence & keySequence,Qt::Key key)117 void KeySequenceLineEdit::addSpecialKeyHandler(const QKeySequence &keySequence, Qt::Key key)
118 {
119 auto keyHandler = KeyHandlerFactory::create();
120 keyHandler->registerKey(keySequence);
121 auto keyFilter = QSharedPointer<NativeKeyEventFilter>(new NativeKeyEventFilter(keyHandler));
122 connect(keyFilter.data(), &NativeKeyEventFilter::triggered, [this, key]() { keyPressed(key); });
123 mSpecialKeyFilters.append(keyFilter);
124 QApplication::instance()->installNativeEventFilter(keyFilter.data());
125 }
126