src/model.cpp

Wed, 25 May 2022 17:56:30 +0300

author
Teemu Piippo <teemu@hecknology.net>
date
Wed, 25 May 2022 17:56:30 +0300
changeset 196
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parent 173
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child 200
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permissions
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delete unneeded things

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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
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19 #include <QBrush>
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20 #include <QFile>
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21 #include <QFileInfo>
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22 #include <QFont>
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23 #include <QSaveFile>
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24 #include "model.h"
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25 #include "modeleditor.h"
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26 #include "documentmanager.h"
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27
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28 /**
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29 * @brief Constructs a model
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30 * @param parent QObject parent to pass forward
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31 */
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32 Model::Model(QObject *parent) :
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33 QAbstractListModel{parent}
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34 {
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35 }
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36
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37 /**
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38 * @returns the amount of elements in the model
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39 */
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40 int Model::size() const
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41 {
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42 return static_cast<int>(this->body.size());
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43 }
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44
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45 /**
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46 * @brief Looks up the object ID at the specified index. If out of bounds, returns NULL_ID.
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47 * @param index Index of object to look up
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48 * @return object ID
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49 */
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50 ldraw::id_t Model::at(int index) const
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51 {
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52 if (index >= 0 and index < this->size())
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53 {
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54 return this->body[index]->id;
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55 }
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56 else
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57 {
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58 return ldraw::NULL_ID;
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59 }
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60 }
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61
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62 /**
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63 * @brief @overload QAbstractListModel::rowCount
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64 * @return size
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65 */
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66 int Model::rowCount(const QModelIndex&) const
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67 {
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68 return this->size();
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69 }
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71 /**
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72 * @brief @overload QAbstractListModel::data
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73 * @param index
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74 * @param role
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75 * @return QVariant
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76 */
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77 QVariant Model::data(const QModelIndex& index, int role) const
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78 {
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79 const ldraw::Object* object = (*this)[index.row()];
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80 switch(role)
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81 {
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82 case Qt::DecorationRole:
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83 return QPixmap{object->iconName()}.scaledToHeight(24);
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84 case Qt::DisplayRole:
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85 return object->textRepresentation();
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86 case Qt::ForegroundRole:
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87 return object->textRepresentationForeground();
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88 case Qt::BackgroundRole:
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89 return object->textRepresentationBackground();
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90 case Qt::FontRole:
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91 return object->textRepresentationFont();
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92 default:
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93 return {};
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94 }
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95 }
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96
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97 /**
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98 * @brief Finds the position of the specified object in the model
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99 * @param id Object id to look for
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100 * @return model index
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101 */
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102 QModelIndex Model::find(ldraw::id_t id) const
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103 {
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104 if (this->needObjectsByIdRebuild)
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105 {
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106 this->objectsById.clear();
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107 for (std::size_t i = 0; i < this->body.size(); ++i)
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108 {
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109 this->objectsById[this->body[i]->id] = i;
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110 }
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111 this->needObjectsByIdRebuild = false;
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112 }
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113 const auto it = this->objectsById.find(id);
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114 if (it != this->objectsById.end())
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115 {
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116 return this->index(it->second);
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117 }
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118 else
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119 {
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120 return {};
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121 }
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122 }
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123
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124 /**
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125 * @brief Gets an object id by position in the model
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126 * @param index Position of the object in the model
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127 * @return id
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128 */
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129 ldraw::id_t Model::idAt(const QModelIndex& index) const
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130 {
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131 return (*this)[index.row()]->id;
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132 }
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133
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134 #if 0
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135 /**
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136 * @brief Sets the path to the model
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137 * @param path New path to use
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138 */
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139 void Model::setPath(const QString &path)
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140 {
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141 this->storedPath = path;
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142 this->header.name = QFileInfo{path}.fileName();
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143 // Update the "Name: 1234.dat" comment
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144 if (this->body.size() >= 2)
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145 {
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146 const ldraw::id_t id = this->body[1]->id;
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147 if (this->isA<ldraw::MetaCommand>(id))
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148 {
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149 const QString& textBody = this->body[1]->getProperty<ldraw::Property::Text>();
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150 if (textBody.startsWith("Name: "))
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151 {
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152 auto editor = this->edit();
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153 editor.setObjectProperty<ldraw::Property::Text>(id, "Name: " + this->header.name);
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154 }
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155 }
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156 }
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157 }
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158 #endif
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159
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160 /**
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161 * @brief Adds the given object into the model.
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162 * @param object r-value reference to the object
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163 */
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164 ldraw::id_t Model::append(ModelObjectPointer&& object)
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165 {
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166 const int position = static_cast<int>(this->body.size());
150
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167 Q_EMIT this->beginInsertRows({}, position, position);
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168 this->body.push_back(std::move(object));
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169 Q_EMIT this->endInsertRows();
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170 const ldraw::id_t id = this->body.back()->id;
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171 this->objectsById[id] = this->body.size() - 1;
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172 return id;
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173 }
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174
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175 /**
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176 * @brief Removes the object at the specified position
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177 * @param position
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178 */
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179 void Model::remove(int position)
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180 {
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181 if (position >= 0 and position < signed_cast(this->body.size()))
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182 {
150
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183 Q_EMIT this->beginRemoveRows({}, position, position);
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184 this->body.erase(std::begin(this->body) + position);
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185 this->needObjectsByIdRebuild = true;
150
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186 Q_EMIT this->endRemoveRows();
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187 }
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188 }
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189
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190 void Model::emitDataChangedSignal(int position)
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191 {
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192 Q_EMIT this->dataChanged(this->index(position), this->index(position));
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193 }
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194
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195 /**
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196 * @brief Gets the object pointer at the specified position
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197 * @param index Position of the object
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198 * @returns object pointer
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199 */
150
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200 ldraw::Object* Model::operator[](int index)
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201 {
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202 if (index >= 0 and index < this->size())
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203 {
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204 return this->body[index].get();
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205 }
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206 else
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207 {
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208 throw std::out_of_range{"index out of range"};
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209 }
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210 }
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211
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212 /**
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213 * @brief Gets the object pointer at the specified position
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214 * @param index Position of the object
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215 * @returns object pointer
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216 */
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217 const ldraw::Object* Model::operator[](int index) const
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218 {
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219 if (index >= 0 and index < this->size())
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220 {
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221 return this->body[index].get();
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222 }
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223 else
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224 {
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225 throw std::out_of_range{"index out of range"};
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226 }
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227 }
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228
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229 /**
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230 * @brief Gets an object pointer by id. Used by the editing context to actually modify objects.
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231 * @param id
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232 * @return object pointer
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233 */
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234 ldraw::Object* Model::findObjectById(const ldraw::id_t id)
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235 {
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236 const QModelIndex index = this->find(id);
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237 if (index.isValid())
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238 {
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239 return (*this)[index.row()];
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240 }
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241 else
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242 {
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243 return nullptr;
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244 }
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245 }
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246
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247 const ldraw::Object* Model::findObjectById(const ldraw::id_t id) const
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248 {
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249 const QModelIndex index = this->find(id);
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250 if (index.isValid())
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251 {
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252 return (*this)[index.row()];
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253 }
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254 else
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255 {
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256 return nullptr;
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257 }
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258 }
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259
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260 /**
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261 * @brief Attempts the save the model
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262 */
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263 void save(const Model &model, QIODevice *device)
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264 {
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265 QTextStream out{device};
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266 applyToModel<ldraw::Object>(model, [&](const ldraw::Object* object) {
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267 out << object->toLDrawCode() << "\r\n";
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268 });
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269 }

mercurial