1 | /* $Id: UIMediumSizeEditor.cpp 80861 2019-09-17 14:03:02Z vboxsync $ */
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2 | /** @file
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3 | * VBox Qt GUI - UIMediumSizeEditor class implementation.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2019 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 | /* Qt includes: */
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19 | #include <QGridLayout>
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20 | #include <QLabel>
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21 | #include <QRegExpValidator>
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22 | #include <QSlider>
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23 |
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24 | /* GUI includes: */
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25 | #include "QILineEdit.h"
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26 | #include "UICommon.h"
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27 | #include "UIConverter.h"
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28 | #include "UIMediumSizeEditor.h"
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29 |
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30 | /* COM includes: */
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31 | #include "CSystemProperties.h"
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32 |
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33 |
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34 | const qulonglong UIMediumSizeEditor::m_uSectorSize = 512;
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35 |
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36 | UIMediumSizeEditor::UIMediumSizeEditor(QWidget *pParent /* = 0 */)
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37 | : QIWithRetranslateUI<QWidget>(pParent)
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38 | , m_uSizeMin(_4M)
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39 | , m_uSizeMax(uiCommon().virtualBox().GetSystemProperties().GetInfoVDSize())
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40 | , m_iSliderScale(calculateSliderScale(m_uSizeMax))
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41 | , m_uSize(0)
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42 | , m_enmSizeSuffix(SizeSuffix_Byte)
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43 | , m_pSlider(0)
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44 | , m_pLabelMinSize(0)
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45 | , m_pLabelMaxSize(0)
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46 | , m_pEditor(0)
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47 | {
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48 | /* Prepare: */
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49 | prepare();
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50 | QString strRegEx = QString("[^\\d%1]").arg(uiCommon().decimalSep());
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51 | m_regExNonDigitOrSeparator = QRegularExpression(strRegEx);
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52 | }
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53 |
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54 | void UIMediumSizeEditor::setMediumSize(qulonglong uSize)
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55 | {
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56 | /* Remember the new size: */
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57 | m_uSize = uSize;
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58 |
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59 | /* And assign it to the slider & editor: */
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60 | m_pSlider->blockSignals(true);
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61 | m_pSlider->setValue(sizeMBToSlider(m_uSize, m_iSliderScale));
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62 | m_pSlider->blockSignals(false);
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63 | m_pEditor->blockSignals(true);
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64 | m_pEditor->setText(uiCommon().formatSize(m_uSize));
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65 | m_enmSizeSuffix = uiCommon().parseSizeSuffix(m_pEditor->text());
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66 | m_pEditor->blockSignals(false);
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67 |
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68 | /* Update the tool-tips: */
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69 | updateSizeToolTips(m_uSize);
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70 | }
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71 |
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72 | void UIMediumSizeEditor::retranslateUi()
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73 | {
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74 | /* Translate labels: */
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75 | m_pLabelMinSize->setText(uiCommon().formatSize(m_uSizeMin));
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76 | m_pLabelMaxSize->setText(uiCommon().formatSize(m_uSizeMax));
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77 |
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78 | /* Translate fields: */
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79 | m_pSlider->setToolTip(tr("Holds the size of this medium."));
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80 | m_pEditor->setToolTip(tr("Holds the size of this medium."));
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81 |
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82 | /* Translate tool-tips: */
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83 | updateSizeToolTips(m_uSize);
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84 | }
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85 |
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86 | void UIMediumSizeEditor::sltSizeSliderChanged(int iValue)
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87 | {
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88 | /* Update the current size: */
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89 | m_uSize = sliderToSizeMB(iValue, m_iSliderScale);
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90 | /* Update the other widget: */
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91 | m_pEditor->blockSignals(true);
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92 | m_pEditor->setText(uiCommon().formatSize(m_uSize));
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93 | m_enmSizeSuffix = uiCommon().parseSizeSuffix(m_pEditor->text());
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94 | m_pEditor->blockSignals(false);
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95 | /* Update the tool-tips: */
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96 | updateSizeToolTips(m_uSize);
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97 | /* Notify the listeners: */
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98 | emit sigSizeChanged(m_uSize);
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99 | }
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100 |
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101 | void UIMediumSizeEditor::sltSizeEditorTextChanged()
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102 | {
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103 | QString strSizeString = ensureSizeSuffix(m_pEditor->text());
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104 |
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105 |
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106 | m_pEditor->blockSignals(true);
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107 | int iCursorPosition = m_pEditor->cursorPosition();
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108 | m_pEditor->setText(strSizeString);
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109 | m_pEditor->setCursorPosition(iCursorPosition);
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110 | m_pEditor->blockSignals(false);
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111 |
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112 | /* Update the current size: */
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113 | m_uSize = checkSectorSizeAlignment(uiCommon().parseSize(strSizeString));
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114 |
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115 | /* Update the other widget: */
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116 | m_pSlider->blockSignals(true);
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117 | m_pSlider->setValue(sizeMBToSlider(m_uSize, m_iSliderScale));
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118 | m_pSlider->blockSignals(false);
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119 | /* Update the tool-tips: */
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120 | updateSizeToolTips(m_uSize);
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121 | /* Notify the listeners: */
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122 | emit sigSizeChanged(m_uSize);
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123 | }
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124 |
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125 | QString UIMediumSizeEditor::ensureSizeSuffix(const QString &strSizeString)
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126 | {
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127 | /* Try to update the m_enmSizeSuffix: */
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128 | if (uiCommon().hasSizeSuffix(strSizeString))
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129 | m_enmSizeSuffix = uiCommon().parseSizeSuffix(strSizeString);
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130 |
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131 | QString strOnlyDigits(strSizeString);
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132 | /* Remove any chars from the string except digits and decimal separator and then add a space and size suffix: */
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133 | return QString("%1 %2").arg(strOnlyDigits.remove(m_regExNonDigitOrSeparator)).arg(gpConverter->toString(m_enmSizeSuffix));
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134 | }
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135 |
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136 | void UIMediumSizeEditor::prepare()
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137 | {
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138 | /* Create layout: */
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139 | QGridLayout *pLayout = new QGridLayout(this);
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140 | if (pLayout)
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141 | {
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142 | /* Configure layout: */
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143 | pLayout->setContentsMargins(0, 0, 0, 0);
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144 | pLayout->setColumnStretch(0, 1);
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145 | pLayout->setColumnStretch(1, 1);
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146 | pLayout->setColumnStretch(2, 0);
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147 |
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148 | /* Create size slider: */
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149 | m_pSlider = new QSlider;
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150 | if (m_pSlider)
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151 | {
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152 | /* Configure slider: */
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153 | m_pSlider->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
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154 | m_pSlider->setOrientation(Qt::Horizontal);
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155 | m_pSlider->setTickPosition(QSlider::TicksBelow);
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156 | m_pSlider->setFocusPolicy(Qt::StrongFocus);
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157 | m_pSlider->setPageStep(m_iSliderScale);
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158 | m_pSlider->setSingleStep(m_iSliderScale / 8);
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159 | m_pSlider->setTickInterval(0);
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160 | m_pSlider->setMinimum(sizeMBToSlider(m_uSizeMin, m_iSliderScale));
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161 | m_pSlider->setMaximum(sizeMBToSlider(m_uSizeMax, m_iSliderScale));
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162 | connect(m_pSlider, &QSlider::valueChanged,
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163 | this, &UIMediumSizeEditor::sltSizeSliderChanged);
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164 |
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165 | /* Add into layout: */
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166 | pLayout->addWidget(m_pSlider, 0, 0, 1, 2, Qt::AlignTop);
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167 | }
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168 |
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169 | /* Create minimum size label: */
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170 | m_pLabelMinSize = new QLabel;
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171 | if (m_pLabelMinSize)
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172 | {
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173 | /* Configure label: */
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174 | m_pLabelMinSize->setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
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175 |
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176 | /* Add into layout: */
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177 | pLayout->addWidget(m_pLabelMinSize, 1, 0);
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178 | }
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179 |
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180 | /* Create maximum size label: */
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181 | m_pLabelMaxSize = new QLabel;
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182 | if (m_pLabelMaxSize)
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183 | {
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184 | /* Configure label: */
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185 | m_pLabelMaxSize->setAlignment(Qt::AlignRight | Qt::AlignVCenter);
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186 |
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187 | /* Add into layout: */
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188 | pLayout->addWidget(m_pLabelMaxSize, 1, 1);
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189 | }
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190 |
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191 | /* Create size editor: */
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192 | m_pEditor = new QILineEdit;
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193 | if (m_pEditor)
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194 | {
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195 | /* Configure editor: */
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196 | m_pEditor->installEventFilter(this);
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197 | m_pEditor->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
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198 | m_pEditor->setFixedWidthByText("88888.88 MB");
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199 | m_pEditor->setAlignment(Qt::AlignRight);
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200 | m_pEditor->setValidator(new QRegExpValidator(QRegExp(uiCommon().sizeRegexp()), this));
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201 | connect(m_pEditor, &QILineEdit::textChanged,
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202 | this, &UIMediumSizeEditor::sltSizeEditorTextChanged);
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203 |
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204 | /* Add into layout: */
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205 | pLayout->addWidget(m_pEditor, 0, 2, Qt::AlignTop);
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206 | }
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207 | }
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208 |
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209 | /* Apply language settings: */
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210 | retranslateUi();
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211 | }
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212 |
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213 | /* static */
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214 | int UIMediumSizeEditor::calculateSliderScale(qulonglong uMaximumMediumSize)
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215 | {
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216 | /* Detect how many steps to recognize between adjacent powers of 2
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217 | * to ensure that the last slider step is exactly that we need: */
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218 | int iSliderScale = 0;
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219 | int iPower = log2i(uMaximumMediumSize);
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220 | qulonglong uTickMB = (qulonglong)1 << iPower;
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221 | if (uTickMB < uMaximumMediumSize)
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222 | {
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223 | qulonglong uTickMBNext = (qulonglong)1 << (iPower + 1);
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224 | qulonglong uGap = uTickMBNext - uMaximumMediumSize;
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225 | iSliderScale = (int)((uTickMBNext - uTickMB) / uGap);
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226 | #ifdef VBOX_WS_MAC
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227 | // WORKAROUND:
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228 | // There is an issue with Qt5 QSlider under OSX:
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229 | // Slider tick count (maximum - minimum) is limited with some
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230 | // "magical number" - 588351, having it more than that brings
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231 | // unpredictable results like slider token jumping and disappearing,
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232 | // so we are limiting tick count by lowering slider-scale 128 times.
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233 | iSliderScale /= 128;
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234 | #endif /* VBOX_WS_MAC */
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235 | }
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236 | return qMax(iSliderScale, 8);
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237 | }
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238 |
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239 | /* static */
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240 | int UIMediumSizeEditor::log2i(qulonglong uValue)
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241 | {
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242 | if (!uValue)
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243 | return 0;
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244 | int iPower = -1;
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245 | while (uValue)
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246 | {
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247 | ++iPower;
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248 | uValue >>= 1;
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249 | }
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250 | return iPower;
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251 | }
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252 |
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253 | /* static */
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254 | int UIMediumSizeEditor::sizeMBToSlider(qulonglong uValue, int iSliderScale)
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255 | {
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256 | /* Make sure *any* slider value is multiple of m_uSectorSize: */
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257 | uValue /= m_uSectorSize;
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258 |
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259 | /* Calculate result: */
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260 | int iPower = log2i(uValue);
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261 | qulonglong uTickMB = qulonglong (1) << iPower;
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262 | qulonglong uTickMBNext = qulonglong (1) << (iPower + 1);
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263 | int iStep = (uValue - uTickMB) * iSliderScale / (uTickMBNext - uTickMB);
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264 | int iResult = iPower * iSliderScale + iStep;
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265 |
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266 | /* Return result: */
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267 | return iResult;
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268 | }
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269 |
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270 | /* static */
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271 | qulonglong UIMediumSizeEditor::sliderToSizeMB(int uValue, int iSliderScale)
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272 | {
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273 | /* Calculate result: */
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274 | int iPower = uValue / iSliderScale;
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275 | int iStep = uValue % iSliderScale;
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276 | qulonglong uTickMB = qulonglong (1) << iPower;
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277 | qulonglong uTickMBNext = qulonglong (1) << (iPower + 1);
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278 | qulonglong uResult = uTickMB + (uTickMBNext - uTickMB) * iStep / iSliderScale;
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279 |
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280 | /* Make sure *any* slider value is multiple of m_uSectorSize: */
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281 | uResult *= m_uSectorSize;
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282 |
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283 | /* Return result: */
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284 | return uResult;
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285 | }
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286 |
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287 | void UIMediumSizeEditor::updateSizeToolTips(qulonglong uSize)
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288 | {
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289 | const QString strToolTip = tr("<nobr>%1 (%2 B)</nobr>").arg(uiCommon().formatSize(uSize)).arg(uSize);
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290 | m_pSlider->setToolTip(strToolTip);
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291 | m_pEditor->setToolTip(strToolTip);
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292 | }
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293 |
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294 | qulonglong UIMediumSizeEditor::checkSectorSizeAlignment(qulonglong uSize)
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295 | {
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296 | if (m_uSectorSize == 0 || uSize % m_uSectorSize == 0)
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297 | return uSize;
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298 | qulonglong uNewSize = (uSize / m_uSectorSize) * m_uSectorSize;
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299 | return uNewSize;
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300 | }
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