src/model.cpp

Wed, 08 Jun 2022 23:14:55 +0300

author
Teemu Piippo <teemu@hecknology.net>
date
Wed, 08 Jun 2022 23:14:55 +0300
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child 232
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permissions
-rw-r--r--

Add model icons back into the list view

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1 /*
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2 * LDForge: LDraw parts authoring CAD
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3 * Copyright (C) 2013 - 2020 Teemu Piippo
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4 *
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5 * This program is free software: you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation, either version 3 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18
208
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19 #include <QPixmap>
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20 #include "model.h"
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21
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22 static const char* iconPathForElement(const ModelElement& element)
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23 {
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24 return std::visit(overloaded{
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25 [](const Colored<SubfileReference>&) {
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26 return ":/icons/linetype-subfile.png";
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27 },
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28 [](const Colored<LineSegment>&) {
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29 return ":/icons/linetype-edgeline.png";
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30 },
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31 [](const Colored<Triangle>&) {
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32 return ":/icons/linetype-triangle.png";
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33 },
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34 [](const Colored<Quadrilateral>&) {
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35 return ":/icons/linetype-quadrilateral.png";
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36 },
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37 [](const Colored<ConditionalEdge>&) {
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38 return ":/icons/linetype-conditionaledge.png";
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39 },
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40 [](const Comment&) {
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41 return ":/icons/chatbubble-ellipses-outline.png";
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42 },
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43 [](const Empty&) {
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44 return "";
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45 },
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46 [](const ParseError&) {
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47 return ":/icons/linetype-errorline.png";
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48 },
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49 }, element);
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50 }
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51
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52 static QPixmap iconForElement(const ModelElement& element)
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53 {
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54 // We avoid processing the same image over and over again by storing it
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55 // in a static constant. However, we need one per each possible type
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56 // of ModelElement, so we put the pixmap constant inside a templated lambda,
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57 // which gets instiated once for each type of ModelElement.
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58 return std::visit([](auto&& element){
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59 static const QPixmap pixmap = QPixmap::fromImage(
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60 QImage{iconPathForElement(element)}
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61 .scaledToHeight(24, Qt::SmoothTransformation)
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62 );
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63 return pixmap;
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64 }, element);
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65 }
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66
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67 QString modelElementToString(const ModelElement &element)
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68 {
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69 return std::visit(overloaded{
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70 [](const Colored<SubfileReference>& ref) {
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71 return QStringLiteral("1 %1 %2 %3")
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72 .arg(ref.color.index)
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73 .arg(transformToString(ref.transformation))
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74 .arg(ref.name);
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75 },
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76 [](const Colored<LineSegment>& seg) {
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77 return QStringLiteral("2 %1 %2 %3")
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78 .arg(seg.color.index)
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79 .arg(vertexToString(seg.p1))
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80 .arg(vertexToString(seg.p2));
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81 },
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82 [](const Colored<Triangle>& triangle) {
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83 return QStringLiteral("3 %1 %2 %3 %4")
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84 .arg(triangle.color.index)
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85 .arg(vertexToString(triangle.p1))
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86 .arg(vertexToString(triangle.p2))
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87 .arg(vertexToString(triangle.p3));
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88 },
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89 [](const Colored<Quadrilateral>& quad) {
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90 return QStringLiteral("4 %1 %2 %3 %4 %5")
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91 .arg(quad.color.index)
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92 .arg(vertexToString(quad.p1))
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93 .arg(vertexToString(quad.p2))
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94 .arg(vertexToString(quad.p3))
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95 .arg(vertexToString(quad.p4));
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96 },
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97 [](const Colored<ConditionalEdge>& cedge) {
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98 return QStringLiteral("5 %1 %2 %3 %4 %5")
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99 .arg(cedge.color.index)
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100 .arg(vertexToString(cedge.p1))
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101 .arg(vertexToString(cedge.p2))
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102 .arg(vertexToString(cedge.c1))
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103 .arg(vertexToString(cedge.c2));
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104 },
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105 [](const Comment& comment) {
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106 return "0 " + comment.text;
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107 },
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108 [](const Empty&) {
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109 return QStringLiteral("");
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110 },
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111 [](const ParseError& parseError) {
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112 return parseError.code;
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113 },
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114 }, element);
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115 }
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116
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117 Model::Model(QObject *parent) :
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118 QAbstractListModel{parent}
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119 {
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120 }
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121
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122 Model::~Model()
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123 {
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124 }
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125
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126 ModelId Model::append(const ModelElement &value)
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127 {
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128 const int position = static_cast<int>(this->body.size());
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129 const ModelId id = this->runningId;
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130 this->runningId.value += 1;
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131 Q_EMIT this->beginInsertRows({}, position, position);
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132 this->body.push_back({value, id});
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133 this->positions[id] = position;
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134 Q_EMIT this->endInsertRows();
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135 return id;
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136 }
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137
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138 const ModelElement &Model::at(int position) const
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139 {
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140 return this->body[position].data;
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141 }
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142
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143 ModelId Model::idAt(int position) const
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144 {
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145 return this->body[position].id;
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146 }
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147
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148 void Model::assignAt(int position, const ModelElement &element)
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149 {
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150 this->body[position].data = element;
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151 const QModelIndex index = this->index(position);
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152 Q_EMIT this->dataChanged(index, index);
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153 }
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154
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155 std::optional<int> Model::find(ModelId id) const
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156 {
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157 return pointerToOptional(findInMap(this->positions, id));
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158 }
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159
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160 template<typename K, typename V>
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161 void removeFromMap(std::map<K, V>& map, const K& key)
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162 {
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163 const auto it = map.find(key);
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164 if (it != map.end()) {
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165 map.erase(it);
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166 }
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167 }
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168
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169 void Model::remove(int index)
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170 {
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171 if (index >= 0 and index < this->size()) {
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172 Q_EMIT this->beginRemoveRows({}, index, index);
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173 removeFromMap(this->positions, this->body[index].id);
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174 this->body.erase(this->body.begin() + index);
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175 for (int i = index; i < this->size(); ++i) {
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176 this->positions[this->body[i].id] = i;
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177 }
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178 Q_EMIT this->endRemoveRows();
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179 }
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180 }
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181
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182 int Model::rowCount(const QModelIndex &) const
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183 {
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184 return this->size();
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185 }
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186
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187 QVariant Model::data(const QModelIndex &index, int role) const
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188 {
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189 const int i = index.row();
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190 const ModelElement& element = this->body[i].data;
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191 switch(role)
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192 {
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193 case Qt::DecorationRole:
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194 return iconForElement(element);
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195 case Qt::DisplayRole:
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196 return modelElementToString(element);
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197 /*
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198 case Qt::ForegroundRole:
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199 return object->textRepresentationForeground();
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200 case Qt::BackgroundRole:
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201 return object->textRepresentationBackground();
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202 case Qt::FontRole:
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203 return object->textRepresentationFont();
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204 */
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205 default:
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206 return {};
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207 }
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208 }
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209
200
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210 const ModelElement &Model::operator[](int index) const
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211 {
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212 return this->body[index].data;
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213 }
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214
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215 int Model::size() const
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216 {
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217 return this->body.size();
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218 }
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219
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220 void save(const Model &model, QIODevice *device)
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221 {
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222 QTextStream out{device};
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223 for (int i = 0; i < model.size(); ++i) {
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224 out << modelElementToString(model[i]) << "\r\n";
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225 }
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226 }
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227
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228 /**
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229 * @brief Sets the path to the model
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230 * @param path New path to use
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231 */
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232 void updateHeaderNameField(Model& model, const QString &name)
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233 {
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234 // Update the "Name: 1234.dat" comment
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235 if (model.size() >= 2) {
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236 if (const Comment* nameObject = std::get_if<Comment>(&model[1])) {
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237 if (nameObject->text.startsWith("Name: ")) {
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238 model[1] = Comment{"Name: " + name};
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239 }
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240 }
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241 }
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242 }

mercurial