1 | /* $Id: UIHotKeyEditor.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
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2 | /** @file
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3 | * VBox Qt GUI - UIHotKeyEditor class implementation.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2013-2019 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 | #ifdef VBOX_WITH_PRECOMPILED_HEADERS
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19 | # include <precomp.h>
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20 | #else /* !VBOX_WITH_PRECOMPILED_HEADERS */
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21 |
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22 | /* Qt includes: */
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23 | # include <QApplication>
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24 | # include <QHBoxLayout>
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25 | # include <QLineEdit>
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26 | # include <QKeyEvent>
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27 | # include <QStyle>
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28 |
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29 | /* GUI includes; */
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30 | # include "UIHostComboEditor.h"
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31 | # include "UIHotKeyEditor.h"
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32 | # include "UIIconPool.h"
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33 | # include "QIToolButton.h"
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34 |
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35 | #endif /* !VBOX_WITH_PRECOMPILED_HEADERS */
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36 |
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37 |
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38 | /** QLineEdit extension representing hot-key editor. */
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39 | class UIHotKeyLineEdit : public QLineEdit
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40 | {
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41 | Q_OBJECT;
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42 |
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43 | public:
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44 |
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45 | /** Constructs hot-key editor passing @a pParent to the base-class. */
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46 | UIHotKeyLineEdit(QWidget *pParent);
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47 |
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48 | protected slots:
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49 |
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50 | /** Deselects the hot-key editor text. */
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51 | void sltDeselect() { deselect(); }
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52 |
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53 | protected:
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54 |
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55 | /** Handles key-press @a pEvent. */
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56 | virtual void keyPressEvent(QKeyEvent *pEvent) /* override */;
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57 | /** Handles key-release @a pEvent. */
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58 | virtual void keyReleaseEvent(QKeyEvent *pEvent) /* override */;
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59 |
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60 | private:
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61 |
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62 | /** Returns whether the passed @a pevent should be ignored. */
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63 | bool isKeyEventIgnored(QKeyEvent *pEvent);
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64 | };
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65 |
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66 |
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67 | /*********************************************************************************************************************************
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68 | * Class UIHotKeyLineEdit implementation. *
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69 | *********************************************************************************************************************************/
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70 |
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71 | UIHotKeyLineEdit::UIHotKeyLineEdit(QWidget *pParent)
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72 | : QLineEdit(pParent)
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73 | {
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74 | /* Configure self: */
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75 | setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Expanding);
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76 | setContextMenuPolicy(Qt::NoContextMenu);
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77 |
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78 | /* Connect selection preserver: */
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79 | connect(this, SIGNAL(selectionChanged()), this, SLOT(sltDeselect()));
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80 | }
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81 |
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82 | void UIHotKeyLineEdit::keyPressEvent(QKeyEvent *pEvent)
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83 | {
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84 | /* Is this event ignored? */
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85 | if (isKeyEventIgnored(pEvent))
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86 | return;
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87 | /* Call to base-class: */
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88 | QLineEdit::keyPressEvent(pEvent);
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89 | }
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90 |
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91 | void UIHotKeyLineEdit::keyReleaseEvent(QKeyEvent *pEvent)
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92 | {
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93 | /* Is this event ignored? */
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94 | if (isKeyEventIgnored(pEvent))
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95 | return;
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96 | /* Call to base-class: */
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97 | QLineEdit::keyReleaseEvent(pEvent);
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98 | }
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99 |
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100 | bool UIHotKeyLineEdit::isKeyEventIgnored(QKeyEvent *pEvent)
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101 | {
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102 | /* Ignore some keys: */
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103 | switch (pEvent->key())
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104 | {
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105 | /* Ignore cursor keys: */
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106 | case Qt::Key_Left:
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107 | case Qt::Key_Right:
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108 | case Qt::Key_Up:
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109 | case Qt::Key_Down:
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110 | pEvent->ignore();
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111 | return true;
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112 | /* Default handling for others: */
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113 | default: break;
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114 | }
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115 | /* Do not ignore key by default: */
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116 | return false;
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117 | }
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118 |
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119 |
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120 | /*********************************************************************************************************************************
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121 | * Class UIHotKeyEditor implementation. *
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122 | *********************************************************************************************************************************/
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123 |
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124 | UIHotKeyEditor::UIHotKeyEditor(QWidget *pParent)
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125 | : QIWithRetranslateUI<QWidget>(pParent)
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126 | , m_fIsModifiersAllowed(false)
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127 | , m_pMainLayout(new QHBoxLayout(this))
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128 | , m_pButtonLayout(new QHBoxLayout)
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129 | , m_pLineEdit(new UIHotKeyLineEdit(this))
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130 | , m_pResetButton(new QIToolButton(this))
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131 | , m_pClearButton(new QIToolButton(this))
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132 | , m_iTakenKey(-1)
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133 | , m_fSequenceTaken(false)
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134 | {
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135 | /* Configure self: */
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136 | setAutoFillBackground(true);
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137 | setFocusProxy(m_pLineEdit);
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138 |
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139 | /* Configure layout: */
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140 | #ifdef VBOX_WS_MAC
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141 | m_pMainLayout->setSpacing(5);
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142 | #else
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143 | m_pMainLayout->setSpacing(qApp->style()->pixelMetric(QStyle::PM_LayoutVerticalSpacing) / 2);
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144 | #endif
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145 | m_pMainLayout->setContentsMargins(0, 0, 0, 0);
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146 | m_pMainLayout->addWidget(m_pLineEdit);
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147 | m_pMainLayout->addLayout(m_pButtonLayout);
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148 |
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149 | /* Configure button layout: */
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150 | m_pButtonLayout->setSpacing(0);
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151 | m_pButtonLayout->setContentsMargins(0, 0, 0, 0);
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152 | m_pButtonLayout->addWidget(m_pResetButton);
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153 | m_pButtonLayout->addWidget(m_pClearButton);
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154 |
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155 | /* Configure line-edit: */
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156 | m_pLineEdit->installEventFilter(this);
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157 |
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158 | /* Configure tool-buttons: */
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159 | m_pResetButton->removeBorder();
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160 | m_pResetButton->setIcon(UIIconPool::iconSet(":/import_16px.png"));
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161 | connect(m_pResetButton, SIGNAL(clicked(bool)), this, SLOT(sltReset()));
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162 | m_pClearButton->removeBorder();
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163 | m_pClearButton->setIcon(UIIconPool::iconSet(":/eraser_16px.png"));
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164 | connect(m_pClearButton, SIGNAL(clicked(bool)), this, SLOT(sltClear()));
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165 |
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166 | /* Translate finally: */
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167 | retranslateUi();
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168 | }
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169 |
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170 | void UIHotKeyEditor::sltReset()
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171 | {
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172 | /* Reset the seuence of the hot-key: */
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173 | m_hotKey.setSequence(m_hotKey.defaultSequence());
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174 | /* Redraw sequence: */
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175 | drawSequence();
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176 | /* Move the focut to text-field: */
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177 | m_pLineEdit->setFocus();
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178 | /* Commit data to the listener: */
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179 | emit sigCommitData(this);
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180 | }
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181 |
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182 | void UIHotKeyEditor::sltClear()
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183 | {
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184 | /* Clear the seuence of the hot-key: */
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185 | m_hotKey.setSequence(QString());
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186 | /* Redraw sequence: */
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187 | drawSequence();
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188 | /* Move the focut to text-field: */
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189 | m_pLineEdit->setFocus();
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190 | /* Commit data to the listener: */
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191 | emit sigCommitData(this);
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192 | }
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193 |
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194 | bool UIHotKeyEditor::eventFilter(QObject *pWatched, QEvent *pEvent)
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195 | {
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196 | /* Special handling for our line-edit only: */
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197 | if (pWatched != m_pLineEdit)
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198 | return QWidget::eventFilter(pWatched, pEvent);
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199 |
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200 | /* Special handling for key events only: */
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201 | if (pEvent->type() != QEvent::KeyPress &&
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202 | pEvent->type() != QEvent::KeyRelease)
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203 | return QWidget::eventFilter(pWatched, pEvent);
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204 |
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205 | /* Cast passed event to required type: */
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206 | QKeyEvent *pKeyEvent = static_cast<QKeyEvent*>(pEvent);
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207 |
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208 | /* Should we skip that event to our line-edit? */
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209 | if (shouldWeSkipKeyEventToLineEdit(pKeyEvent))
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210 | return false;
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211 |
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212 | /* Fetch modifiers state: */
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213 | fetchModifiersState();
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214 |
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215 | /* Handle key event: */
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216 | switch (pEvent->type())
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217 | {
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218 | case QEvent::KeyPress: handleKeyPress(pKeyEvent); break;
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219 | case QEvent::KeyRelease: handleKeyRelease(pKeyEvent); break;
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220 | default: break;
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221 | }
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222 |
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223 | /* Fetch host-combo modifier state: */
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224 | checkIfHostModifierNeeded();
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225 |
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226 | /* Reflect sequence: */
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227 | reflectSequence();
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228 |
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229 | /* Prevent further key event handling: */
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230 | return true;
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231 | }
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232 |
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233 | void UIHotKeyEditor::retranslateUi()
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234 | {
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235 | m_pResetButton->setToolTip(tr("Reset shortcut to default"));
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236 | m_pClearButton->setToolTip(tr("Unset shortcut"));
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237 | }
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238 |
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239 | void UIHotKeyEditor::keyPressEvent(QKeyEvent *pEvent)
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240 | {
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241 | /* Is this event ignored? */
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242 | if (isKeyEventIgnored(pEvent))
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243 | return;
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244 | /* Call to base-class: */
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245 | return QWidget::keyPressEvent(pEvent);
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246 | }
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247 |
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248 | void UIHotKeyEditor::keyReleaseEvent(QKeyEvent *pEvent)
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249 | {
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250 | /* Is this event ignored? */
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251 | if (isKeyEventIgnored(pEvent))
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252 | return;
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253 | /* Call to base-class: */
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254 | return QWidget::keyReleaseEvent(pEvent);
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255 | }
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256 |
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257 | bool UIHotKeyEditor::shouldWeSkipKeyEventToLineEdit(QKeyEvent *pEvent)
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258 | {
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259 | /* Special handling for some keys: */
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260 | switch (pEvent->key())
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261 | {
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262 | /* Skip Escape to our line-edit: */
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263 | case Qt::Key_Escape: return true;
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264 | /* Skip Return/Enter to our line-edit: */
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265 | case Qt::Key_Return:
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266 | case Qt::Key_Enter: return true;
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267 | /* Skip cursor keys to our line-edit: */
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268 | case Qt::Key_Left:
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269 | case Qt::Key_Right:
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270 | case Qt::Key_Up:
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271 | case Qt::Key_Down: return true;
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272 | /* Default handling for others: */
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273 | default: break;
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274 | }
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275 | /* Do not skip by default: */
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276 | return false;
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277 | }
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278 |
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279 | bool UIHotKeyEditor::isKeyEventIgnored(QKeyEvent *pEvent)
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280 | {
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281 | /* Ignore some keys: */
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282 | switch (pEvent->key())
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283 | {
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284 | /* Ignore cursor keys: */
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285 | case Qt::Key_Left:
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286 | case Qt::Key_Right:
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287 | case Qt::Key_Up:
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288 | case Qt::Key_Down:
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289 | pEvent->ignore();
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290 | return true;
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291 | /* Default handling for others: */
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292 | default: break;
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293 | }
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294 | /* Do not ignore key by default: */
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295 | return false;
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296 | }
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297 |
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298 | void UIHotKeyEditor::fetchModifiersState()
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299 | {
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300 | /* Make sure modifiers are allowed: */
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301 | if (!m_fIsModifiersAllowed)
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302 | return;
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303 |
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304 | /* If full sequence was not yet taken: */
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305 | if (!m_fSequenceTaken)
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306 | {
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307 | /* Recreate the set of taken modifiers: */
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308 | m_takenModifiers.clear();
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309 | Qt::KeyboardModifiers currentModifiers = QApplication::keyboardModifiers();
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310 | if (currentModifiers != Qt::NoModifier)
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311 | {
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312 | if ((m_takenModifiers.size() < 3) && (currentModifiers & Qt::ControlModifier))
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313 | m_takenModifiers << Qt::CTRL;
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314 | if ((m_takenModifiers.size() < 3) && (currentModifiers & Qt::AltModifier))
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315 | m_takenModifiers << Qt::ALT;
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316 | if ((m_takenModifiers.size() < 3) && (currentModifiers & Qt::MetaModifier))
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317 | m_takenModifiers << Qt::META;
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318 | }
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319 | }
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320 | }
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321 |
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322 | void UIHotKeyEditor::checkIfHostModifierNeeded()
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323 | {
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324 | /* Make sure other modifiers are NOT allowed: */
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325 | if (m_fIsModifiersAllowed)
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326 | return;
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327 |
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328 | /* Clear the set of taken modifiers: */
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329 | m_takenModifiers.clear();
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330 |
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331 | /* If taken key was set: */
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332 | if (m_iTakenKey != -1)
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333 | /* We have to add Host+ modifier: */
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334 | m_takenModifiers << UIHostCombo::hostComboModifierIndex();
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335 | }
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336 |
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337 | bool UIHotKeyEditor::approvedKeyPressed(QKeyEvent *pKeyEvent)
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338 | {
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339 | /* Qt by some reason generates text for complex cases like
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340 | * Backspace or Del but skip other similar things like
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341 | * F1 - F35, Home, End, Page UP, Page DOWN and so on.
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342 | * We should declare all the approved keys. */
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343 |
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344 | /* Compose the set of the approved keys: */
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345 | QSet<int> approvedKeys;
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346 |
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347 | /* Add Fn keys: */
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348 | for (int i = Qt::Key_F1; i <= Qt::Key_F35; ++i)
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349 | approvedKeys << i;
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350 |
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351 | /* Add digit keys: */
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352 | for (int i = Qt::Key_0; i <= Qt::Key_9; ++i)
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353 | approvedKeys << i;
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354 |
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355 | /* We allow to use only English letters in shortcuts.
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356 | * The reason is by some reason Qt distinguish native language
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357 | * letters only with no modifiers pressed.
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358 | * With modifiers pressed Qt thinks the letter is always English. */
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359 | for (int i = Qt::Key_A; i <= Qt::Key_Z; ++i)
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360 | approvedKeys << i;
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361 |
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362 | /* Add few more special cases: */
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363 | approvedKeys << Qt::Key_Space << Qt::Key_Backspace
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364 | << Qt::Key_Insert << Qt::Key_Delete
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365 | << Qt::Key_Pause << Qt::Key_Print
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366 | << Qt::Key_Home << Qt::Key_End
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367 | << Qt::Key_PageUp << Qt::Key_PageDown
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368 | << Qt::Key_QuoteLeft << Qt::Key_AsciiTilde
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369 | << Qt::Key_Minus << Qt::Key_Underscore
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370 | << Qt::Key_Equal << Qt::Key_Plus
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371 | << Qt::Key_ParenLeft << Qt::Key_ParenRight
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372 | << Qt::Key_BraceLeft << Qt::Key_BraceRight
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373 | << Qt::Key_BracketLeft << Qt::Key_BracketRight
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374 | << Qt::Key_Backslash << Qt::Key_Bar
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375 | << Qt::Key_Semicolon << Qt::Key_Colon
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376 | << Qt::Key_Apostrophe << Qt::Key_QuoteDbl
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377 | << Qt::Key_Comma << Qt::Key_Period << Qt::Key_Slash
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378 | << Qt::Key_Less << Qt::Key_Greater << Qt::Key_Question;
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379 |
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380 | /* Is this one of the approved keys? */
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381 | if (approvedKeys.contains(pKeyEvent->key()))
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382 | return true;
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383 |
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384 | /* False by default: */
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385 | return false;
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386 | }
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387 |
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388 | void UIHotKeyEditor::handleKeyPress(QKeyEvent *pKeyEvent)
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389 | {
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390 | /* If full sequence was not yet taken: */
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391 | if (!m_fSequenceTaken)
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392 | {
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393 | /* If finalizing key is pressed: */
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394 | if (approvedKeyPressed(pKeyEvent))
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395 | {
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396 | /* Remember taken key: */
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397 | m_iTakenKey = pKeyEvent->key();
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398 | /* Mark full sequence taken: */
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399 | m_fSequenceTaken = true;
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400 | }
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401 | /* If something other is pressed: */
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402 | else
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403 | {
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404 | /* Clear taken key: */
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405 | m_iTakenKey = -1;
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406 | }
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407 | }
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408 | }
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409 |
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410 | void UIHotKeyEditor::handleKeyRelease(QKeyEvent *pKeyEvent)
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411 | {
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412 | /* If full sequence was taken already and no modifiers are currently held: */
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413 | if (m_fSequenceTaken && (pKeyEvent->modifiers() == Qt::NoModifier))
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414 | {
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415 | /* Reset taken sequence: */
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416 | m_fSequenceTaken = false;
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417 | }
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418 | }
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419 |
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420 | void UIHotKeyEditor::reflectSequence()
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421 | {
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422 | /* Acquire modifier names: */
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423 | QString strModifierNames;
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424 | QStringList modifierNames;
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425 | foreach (int iTakenModifier, m_takenModifiers)
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426 | {
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427 | if (iTakenModifier == UIHostCombo::hostComboModifierIndex())
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428 | modifierNames << UIHostCombo::hostComboModifierName();
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429 | else
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430 | modifierNames << QKeySequence(iTakenModifier).toString(QKeySequence::NativeText);
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431 | }
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432 | if (!modifierNames.isEmpty())
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433 | strModifierNames = modifierNames.join("");
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434 | /* Acquire main key name: */
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435 | QString strMainKeyName;
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436 | if (m_iTakenKey != -1)
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437 | strMainKeyName = QKeySequence(m_iTakenKey).toString(QKeySequence::NativeText);
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438 |
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439 | /* Compose the text to reflect: */
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440 | QString strText;
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441 | /* If modifiers were set: */
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442 | if (!strModifierNames.isEmpty())
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443 | /* Append the text with modifier names: */
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444 | strText.append(strModifierNames);
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445 | /* If main key was set: */
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446 | if (!strMainKeyName.isEmpty())
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447 | /* Append the sequence with the main key name: */
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448 | strText.append(strMainKeyName);
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449 | /* Reflect what we've got: */
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450 | m_pLineEdit->setText(strText);
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451 |
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452 | /* Compose the sequence to save: */
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453 | QString strSequence;
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454 | /* If main key was set: */
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455 | if (!strMainKeyName.isEmpty())
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456 | {
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457 | /* Append the sequence with the main key name: */
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458 | strSequence.append(strMainKeyName);
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459 | /* If modifiers are allowed: */
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460 | if (m_fIsModifiersAllowed)
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461 | /* Prepend the sequence with modifier names: */
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462 | strSequence.prepend(strModifierNames);
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463 | }
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464 | /* Save what we've got: */
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465 | m_hotKey.setSequence(strSequence);
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466 | /* Commit data to the listener: */
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467 | emit sigCommitData(this);
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468 | }
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469 |
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470 | void UIHotKeyEditor::drawSequence()
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471 | {
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472 | /* Compose the text to reflect: */
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473 | QString strText = m_hotKey.sequence();
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474 | /* If modifiers are not allowed and the text is not empty: */
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475 | if (!m_fIsModifiersAllowed && !strText.isEmpty())
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476 | /* Prepend the text with Host+ modifier name: */
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477 | strText.prepend(UIHostCombo::hostComboModifierName());
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478 | /* Reflect what we've got: */
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479 | m_pLineEdit->setText(strText);
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480 | }
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481 |
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482 | UIHotKey UIHotKeyEditor::hotKey() const
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483 | {
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484 | /* Return hot-key: */
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485 | return m_hotKey;
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486 | }
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487 |
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488 | void UIHotKeyEditor::setHotKey(const UIHotKey &hotKey)
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489 | {
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490 | /* Remember passed hot-key: */
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491 | m_hotKey = hotKey;
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492 | /* Remember if modifiers are allowed: */
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493 | m_fIsModifiersAllowed = m_hotKey.type() == UIHotKeyType_WithModifiers;
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494 | /* Redraw sequence: */
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495 | drawSequence();
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496 | }
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497 |
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498 |
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499 | #include "UIHotKeyEditor.moc"
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