src/model.cpp

Mon, 20 Jun 2022 23:05:27 +0300

author
Teemu Piippo <teemu.s.piippo@gmail.com>
date
Mon, 20 Jun 2022 23:05:27 +0300
changeset 246
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parent 242
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child 250
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permissions
-rw-r--r--

Use crosshair cursor inside the renderer

24
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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 <QPixmap>
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20 #include "model.h"
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21
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22 constexpr unsigned int gcd(unsigned int a, unsigned int b)
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23 {
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24 while (a != b) {
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25 if (b > a) {
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26 b -= a;
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27 }
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28 else if (a > b) {
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29 a -= b;
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30 }
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31 }
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32 return a;
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33 }
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34
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35 static_assert(gcd(16, 15) == 1);
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36 static_assert(gcd(16, 4) == 4);
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37 static_assert(gcd(272, 192) == 16);
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38
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39 static constexpr const char* circularPrimitiveTypeString(const CircularPrimitive& circ)
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40 {
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41 return circularPrimitiveStems[circ.type];
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42 }
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43
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44 static QString circularPrimitiveFilePath(const CircularPrimitive& circ)
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45 {
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46 QString result;
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47 if (circ.fraction.divisions != 16) {
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48 result += QString::number(circ.fraction.divisions) + QStringLiteral("\\");
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49 }
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50 const int factor = gcd(circ.fraction.segments, circ.fraction.divisions);
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51 int num = circ.fraction.segments / factor;
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52 int denom = circ.fraction.divisions / factor;
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53 if (denom < 4) {
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54 num *= 4 / denom;
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55 denom = 4;
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56 }
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57 result += QStringLiteral("%1-%2").arg(num).arg(denom);
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58 result += QString::fromLatin1(circularPrimitiveTypeString(circ));
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59 result += QStringLiteral(".dat");
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60 return result;
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61 }
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62
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63 static const char* iconPathForElement(const ModelElement& element)
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64 {
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65 return std::visit(overloaded{
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66 [](const Colored<SubfileReference>&) {
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67 return ":/icons/linetype-subfile.png";
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68 },
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69 [](const Colored<LineSegment>&) {
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70 return ":/icons/linetype-edgeline.png";
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71 },
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72 [](const Colored<Triangle>&) {
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73 return ":/icons/linetype-triangle.png";
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74 },
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75 [](const Colored<Quadrilateral>&) {
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76 return ":/icons/linetype-quadrilateral.png";
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77 },
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78 [](const Colored<ConditionalEdge>&) {
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79 return ":/icons/linetype-conditionaledge.png";
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80 },
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81 [](const Colored<CircularPrimitive>&) {
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82 return ":/icons/linetype-circularprimitive.png";
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83 },
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84 [](const Comment&) {
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85 return ":/icons/chatbubble-ellipses-outline.png";
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86 },
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87 [](const Empty&) {
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88 return "";
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89 },
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90 [](const ParseError&) {
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91 return ":/icons/linetype-errorline.png";
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92 },
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93 }, element);
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94 }
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95
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96 static QPixmap iconForElement(const ModelElement& element)
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97 {
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98 // We avoid processing the same image over and over again by storing it
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99 // in a static constant. However, we need one per each possible type
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100 // of ModelElement, so we put the pixmap constant inside a templated lambda,
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101 // which gets instiated once for each type of ModelElement.
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102 return std::visit([](auto&& element){
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103 static const QPixmap pixmap = QPixmap::fromImage(
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104 QImage{iconPathForElement(element)}
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105 .scaledToHeight(24, Qt::SmoothTransformation)
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106 );
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107 return pixmap;
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108 }, element);
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109 }
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110
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111 QString modelElementToString(const ModelElement &element)
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112 {
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113 return std::visit(overloaded{
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114 [](const Colored<SubfileReference>& ref) {
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115 return QStringLiteral("1 %1 %2 %3")
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116 .arg(ref.color.index)
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117 .arg(transformToString(ref.transformation))
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118 .arg(ref.name);
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119 },
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120 [](const Colored<LineSegment>& seg) {
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121 return QStringLiteral("2 %1 %2 %3")
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122 .arg(seg.color.index)
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123 .arg(vertexToString(seg.p1))
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124 .arg(vertexToString(seg.p2));
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125 },
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126 [](const Colored<Triangle>& triangle) {
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127 return QStringLiteral("3 %1 %2 %3 %4")
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128 .arg(triangle.color.index)
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129 .arg(vertexToString(triangle.p1))
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130 .arg(vertexToString(triangle.p2))
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131 .arg(vertexToString(triangle.p3));
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132 },
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133 [](const Colored<Quadrilateral>& quad) {
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134 return QStringLiteral("4 %1 %2 %3 %4 %5")
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135 .arg(quad.color.index)
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136 .arg(vertexToString(quad.p1))
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137 .arg(vertexToString(quad.p2))
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138 .arg(vertexToString(quad.p3))
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139 .arg(vertexToString(quad.p4));
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140 },
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141 [](const Colored<ConditionalEdge>& cedge) {
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142 return QStringLiteral("5 %1 %2 %3 %4 %5")
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143 .arg(cedge.color.index)
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144 .arg(vertexToString(cedge.p1))
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145 .arg(vertexToString(cedge.p2))
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146 .arg(vertexToString(cedge.c1))
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147 .arg(vertexToString(cedge.c2));
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148 },
232
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149 [](const Colored<CircularPrimitive>& circ) {
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150 return QStringLiteral("1 %1 %2 %3")
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151 .arg(circ.color.index)
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152 .arg(transformToString(circ.transformation))
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153 .arg(circularPrimitiveFilePath(circ));
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154 },
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155 [](const Comment& comment) {
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156 return "0 " + comment.text;
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157 },
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158 [](const Empty&) {
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159 return QStringLiteral("");
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160 },
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161 [](const ParseError& parseError) {
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162 return parseError.code;
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163 },
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164 }, element);
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165 }
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166
148
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167 Model::Model(QObject *parent) :
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168 QAbstractListModel{parent}
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169 {
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170 }
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171
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172 Model::~Model()
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173 {
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174 }
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175
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176 ModelId Model::append(const ModelElement &value)
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177 {
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178 const int position = static_cast<int>(this->body.size());
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179 const ModelId id = this->runningId;
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180 this->runningId.value += 1;
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181 Q_EMIT this->beginInsertRows({}, position, position);
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182 this->body.push_back({value, id});
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183 this->positions[id] = position;
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184 Q_EMIT this->endInsertRows();
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185 return id;
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186 }
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187
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188 const ModelElement &Model::at(int position) const
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189 {
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190 return this->body[position].data;
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191 }
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192
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193 ModelId Model::idAt(int position) const
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194 {
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195 return this->body[position].id;
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196 }
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197
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198 void Model::assignAt(int position, const ModelElement &element)
133
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199 {
200
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200 this->body[position].data = element;
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201 const QModelIndex index = this->index(position);
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202 Q_EMIT this->dataChanged(index, index);
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203 }
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204
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205 std::optional<int> Model::find(ModelId id) const
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206 {
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207 return pointerToOptional(findInMap(this->positions, id));
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208 }
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209
204
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210 template<typename K, typename V>
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211 void removeFromMap(std::map<K, V>& map, const K& key)
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212 {
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213 const auto it = map.find(key);
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214 if (it != map.end()) {
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215 map.erase(it);
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216 }
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217 }
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218
200
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219 void Model::remove(int index)
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220 {
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221 if (index >= 0 and index < this->size()) {
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222 Q_EMIT this->beginRemoveRows({}, index, index);
204
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223 removeFromMap(this->positions, this->body[index].id);
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224 this->body.erase(this->body.begin() + index);
204
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225 for (int i = index; i < this->size(); ++i) {
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226 this->positions[this->body[i].id] = i;
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227 }
200
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228 Q_EMIT this->endRemoveRows();
133
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229 }
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230 }
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231
200
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232 int Model::rowCount(const QModelIndex &) const
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233 {
137
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234 return this->size();
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235 }
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236
200
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237 QVariant Model::data(const QModelIndex &index, int role) const
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238 {
200
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239 const int i = index.row();
208
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240 const ModelElement& element = this->body[i].data;
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241 switch(role)
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242 {
158
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diff changeset
243 case Qt::DecorationRole:
208
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244 return iconForElement(element);
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245 case Qt::DisplayRole:
208
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246 return modelElementToString(element);
200
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247 /*
8
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248 case Qt::ForegroundRole:
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249 return object->textRepresentationForeground();
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250 case Qt::BackgroundRole:
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251 return object->textRepresentationBackground();
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252 case Qt::FontRole:
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253 return object->textRepresentationFont();
200
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254 */
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255 default:
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256 return {};
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257 }
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258 }
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259
200
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260 const ModelElement &Model::operator[](int index) const
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261 {
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262 return this->body[index].data;
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263 }
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264
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265 int Model::size() const
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266 {
200
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267 return this->body.size();
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268 }
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269
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270 void save(const Model &model, QIODevice *device)
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271 {
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272 QTextStream out{device};
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273 for (int i = 0; i < model.size(); ++i) {
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274 out << modelElementToString(model[i]) << "\r\n";
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275 }
51
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276 }
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277
137
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278 /**
141
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279 * @brief Sets the path to the model
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280 * @param path New path to use
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281 */
200
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282 void updateHeaderNameField(Model& model, const QString &name)
141
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283 {
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284 // Update the "Name: 1234.dat" comment
200
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285 if (model.size() >= 2) {
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286 if (const Comment* nameObject = std::get_if<Comment>(&model[1])) {
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287 if (nameObject->text.startsWith("Name: ")) {
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288 model[1] = Comment{"Name: " + name};
141
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289 }
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290 }
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291 }
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292 }

mercurial