ui/gtk/model.c

Thu, 16 Nov 2017 12:04:10 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Thu, 16 Nov 2017 12:04:10 +0100
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parent 142
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child 147
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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2017 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "model.h"
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33 #include "image.h"
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34
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35 #define IS_UI_LIST_MODEL(obj) \
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36 (G_TYPE_CHECK_INSTANCE_TYPE((obj), list_model_type))
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37 #define UI_LIST_MODEL(obj) \
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38 (G_TYPE_CHECK_INSTANCE_CAST((obj), list_model_type, UiListModel))
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39
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40 static void list_model_class_init(GObjectClass *cl, gpointer data);
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41 static void list_model_interface_init(GtkTreeModelIface *i, gpointer data);
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42 static void list_model_init(UiListModel *instance, GObjectClass *cl);
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43
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44 static GObjectClass list_model_class;
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45 static const GTypeInfo list_model_info = {
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46 sizeof(GObjectClass),
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47 NULL,
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48 NULL,
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49 (GClassInitFunc)list_model_class_init,
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50 NULL,
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51 NULL,
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52 sizeof(UiListModel),
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53 0,
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54 (GInstanceInitFunc)list_model_init
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55 };
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56 static const GInterfaceInfo list_model_interface_info = {
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57 (GInterfaceInitFunc)list_model_interface_init,
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58 NULL,
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59 NULL
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60 };
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61 static GType list_model_type;
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62
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63 void ui_list_init() {
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64 list_model_type = g_type_register_static(
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65 G_TYPE_OBJECT,
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66 "UiListModel",
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67 &list_model_info,
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68 (GTypeFlags)0);
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69 g_type_add_interface_static(
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70 list_model_type,
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71 GTK_TYPE_TREE_MODEL,
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72 &list_model_interface_info);
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73 }
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74
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75 static void list_model_class_init(GObjectClass *cl, gpointer data) {
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76 //cl->finalize = ...; // TODO
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77 }
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78
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79 static void list_model_interface_init(GtkTreeModelIface *i, gpointer data) {
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80 i->get_flags = ui_list_model_get_flags;
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81 i->get_n_columns = ui_list_model_get_n_columns;
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82 i->get_column_type = ui_list_model_get_column_type;
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83 i->get_iter = ui_list_model_get_iter;
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84 i->get_path = ui_list_model_get_path;
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85 i->get_value = ui_list_model_get_value;
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86 i->iter_next = ui_list_model_iter_next;
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87 i->iter_children = ui_list_model_iter_children;
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88 i->iter_has_child = ui_list_model_iter_has_child;
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89 i->iter_n_children = ui_list_model_iter_n_children;
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90 i->iter_nth_child = ui_list_model_iter_nth_child;
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91 i->iter_parent = ui_list_model_iter_parent;
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92 }
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93
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94 static void list_model_init(UiListModel *instance, GObjectClass *cl) {
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95 instance->columntypes = NULL;
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96 instance->var = NULL;
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97 instance->numcolumns = 0;
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98 instance->stamp = g_random_int();
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99 }
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100
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101 static GType ui_gtk_type(UiModelType type) {
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102 switch(type) {
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103 case UI_STRING: return G_TYPE_STRING;
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104 case UI_INTEGER: return G_TYPE_INT;
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105 }
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106 return G_TYPE_INVALID;
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107 }
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108
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109 static void ui_model_set_value(GType type, void *data, GValue *value) {
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110 switch(type) {
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111 case G_TYPE_OBJECT: {
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112 value->g_type = G_TYPE_OBJECT;
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113 g_value_set_object(value, data);
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114 return;
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115 }
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116 case G_TYPE_STRING: {
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117 value->g_type = G_TYPE_STRING;
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118 g_value_set_string(value, data);
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119 return;
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120 }
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121 case G_TYPE_INT: {
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122 value->g_type = G_TYPE_INT;
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123 int *i = data;
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124 g_value_set_int(value, *i);
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125 return;
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126 }
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127 }
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128 value->g_type = G_TYPE_INVALID;
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129 }
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130
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131 UiListModel* ui_list_model_new(UiVar *var, UiModel *info) {
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132 UiListModel *model = g_object_new(list_model_type, NULL);
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133 model->info = info;
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134 model->var = var;
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135 model->columntypes = calloc(sizeof(GType), 2 * info->columns);
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136 int ncol = 0;
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137 for(int i=0;i<info->columns;i++) {
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138 UiModelType type = info->types[i];
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139 if(type == UI_ICON_TEXT) {
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140 model->columntypes[ncol] = G_TYPE_OBJECT;
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141 ncol++;
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142 model->columntypes[ncol] = G_TYPE_STRING;
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143 } else {
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144 model->columntypes[ncol] = ui_gtk_type(info->types[i]);
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145 }
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146 ncol++;
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147 }
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148 model->numcolumns = ncol;
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149 return model;
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150 }
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151
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152
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153 GtkTreeModelFlags ui_list_model_get_flags(GtkTreeModel *tree_model) {
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154 return (GTK_TREE_MODEL_LIST_ONLY | GTK_TREE_MODEL_ITERS_PERSIST);
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155 }
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156
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157 gint ui_list_model_get_n_columns(GtkTreeModel *tree_model) {
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158 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), 0);
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159 UiListModel *model = UI_LIST_MODEL(tree_model);
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160 return model->numcolumns;
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161 }
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162
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163 GType ui_list_model_get_column_type(GtkTreeModel *tree_model, gint index) {
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164 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), G_TYPE_INVALID);
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165 UiListModel *model = UI_LIST_MODEL(tree_model);
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166 g_return_val_if_fail(index < model->numcolumns, G_TYPE_INVALID);
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167 return model->columntypes[index];
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168 }
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169
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170 gboolean ui_list_model_get_iter(
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171 GtkTreeModel *tree_model,
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172 GtkTreeIter *iter,
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173 GtkTreePath *path)
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174 {
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175 g_assert(IS_UI_LIST_MODEL(tree_model));
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176 UiListModel *model = UI_LIST_MODEL(tree_model);
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177 UiList *list = model->var->value;
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178
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179 // check the depth of the path
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180 // a list must have a depth of 1
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181 gint depth = gtk_tree_path_get_depth(path);
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182 g_assert(depth == 1);
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183
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184 // get row
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185 gint *indices = gtk_tree_path_get_indices(path);
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186 gint row = indices[0];
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187
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188 // check row
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189 if(row == 0) {
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190 // we don't need to count if the first element is requested
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191 if(list->first(list) == NULL) {
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192 return FALSE;
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193 }
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194 } else if(row >= list->count(list)) {
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195 return FALSE;
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196 }
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197
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198 // the UiList has an integrated iterator
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199 // we only get a value to adjust it
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200 void *val = NULL;
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201 if(row == 0) {
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202 val = list->first(list);
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203 } else {
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204 val = list->get(list, row);
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205 }
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206
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207 iter->stamp = model->stamp;
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208 iter->user_data = list->iter;
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209 iter->user_data2 = (gpointer)(intptr_t)row; // list->index
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210 iter->user_data3 = val;
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211
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212 return val ? TRUE : FALSE;
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213 }
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214
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215 GtkTreePath* ui_list_model_get_path(
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216 GtkTreeModel *tree_model,
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217 GtkTreeIter *iter)
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218 {
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219 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), NULL);
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220 g_return_val_if_fail(iter != NULL, NULL);
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221 g_return_val_if_fail(iter->user_data != NULL, NULL);
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222
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223 UiListModel *model = UI_LIST_MODEL(tree_model);
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224
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225 GtkTreePath *path = gtk_tree_path_new();
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226 gtk_tree_path_append_index(path, (int)(intptr_t)iter->user_data2); // list->index
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227
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228 return path;
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229 }
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230
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231 void ui_list_model_get_value(
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232 GtkTreeModel *tree_model,
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233 GtkTreeIter *iter,
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234 gint column,
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235 GValue *value)
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236 {
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237 g_return_if_fail(IS_UI_LIST_MODEL(tree_model));
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238 g_return_if_fail(iter != NULL);
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239 g_return_if_fail(iter->user_data != NULL);
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240
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241 UiListModel *model = UI_LIST_MODEL(tree_model);
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242 UiList *list = model->var->value;
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243
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244 g_return_if_fail(column < model->numcolumns);
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245
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246 // TODO: return correct value from column
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247
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248 //value->g_type = G_TYPE_STRING;
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249 list->iter = iter->user_data;
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250 //list->index = (int)(intptr_t)iter->user_data2;
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251 //list->current = iter->user_data3;
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252 if(model->info->getvalue) {
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253 void *data = model->info->getvalue(iter->user_data3, column);
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254 if(model->columntypes[column] == G_TYPE_OBJECT) {
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255 UiImage *img = data;
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256 ui_model_set_value(model->columntypes[column], img->pixbuf, value);
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257 } else {
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258 ui_model_set_value(model->columntypes[column], data, value);
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259 }
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260 } else {
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261 value->g_type = G_TYPE_INVALID;
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262 }
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263 }
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264
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265 gboolean ui_list_model_iter_next(
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266 GtkTreeModel *tree_model,
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267 GtkTreeIter *iter)
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268 {
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269 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), FALSE);
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270 g_return_val_if_fail(iter != NULL, FALSE);
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271 //g_return_val_if_fail(iter->user_data != NULL, FALSE);
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272
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273 if(!iter->user_data) {
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274 return FALSE;
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275 }
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276
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277 UiListModel *model = UI_LIST_MODEL(tree_model);
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278 UiList *list = model->var->value;
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279 list->iter = iter->user_data;
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280 //list->index = (int)(intptr_t)iter->user_data2;
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281 void *val = list->next(list);
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282 iter->user_data = list->iter;
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283 intptr_t index = (intptr_t)iter->user_data2;
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284 index++;
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285 //iter->user_data2 = (gpointer)(intptr_t)list->index;
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286 iter->user_data2 = (gpointer)index;
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287 iter->user_data3 = val;
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288 return val ? TRUE : FALSE;
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289 }
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290
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291 gboolean ui_list_model_iter_children(
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292 GtkTreeModel *tree_model,
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293 GtkTreeIter *iter,
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294 GtkTreeIter *parent)
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295 {
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296 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), FALSE);
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297
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298 UiListModel *model = UI_LIST_MODEL(tree_model);
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299 UiList *list = model->var->value;
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300
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301 if(parent) {
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302 return FALSE;
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303 }
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304
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305 /*
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306 * a list element has no children
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307 * we set the iter to the first element
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308 */
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309 void *val = list->first(list);
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310 iter->stamp = model->stamp;
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311 iter->user_data = list->iter;
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312 iter->user_data2 = (gpointer)0;
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313 iter->user_data3 = val;
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314
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315 return val ? TRUE : FALSE;
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316 }
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317
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318 gboolean ui_list_model_iter_has_child(
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319 GtkTreeModel *tree_model,
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320 GtkTreeIter *iter)
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321 {
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322 return FALSE;
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323 }
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324
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325 gint ui_list_model_iter_n_children(
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326 GtkTreeModel *tree_model,
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327 GtkTreeIter *iter)
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328 {
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329 g_assert(IS_UI_LIST_MODEL(tree_model));
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330
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331 if(!iter) {
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332 // return number of rows
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333 UiListModel *model = UI_LIST_MODEL(tree_model);
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334 UiList *list = model->var->value;
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335 return list->count(list);
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336 }
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337
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338 return 0;
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339 }
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340
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341 gboolean ui_list_model_iter_nth_child(
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342 GtkTreeModel *tree_model,
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343 GtkTreeIter *iter,
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344 GtkTreeIter *parent,
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345 gint n)
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346 {
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347 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), FALSE);
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348
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349 if(parent) {
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350 return FALSE;
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351 }
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352
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353 UiListModel *model = UI_LIST_MODEL(tree_model);
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354 UiList *list = model->var->value;
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355
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356 // check n
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357 if(n == 0) {
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358 // we don't need to count if the first element is requested
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359 if(list->first(list) == NULL) {
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360 return FALSE;
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361 }
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362 } else if(n >= list->count(list)) {
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363 return FALSE;
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364 }
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365
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366 void *val = list->get(list, n);
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367 iter->stamp = model->stamp;
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368 iter->user_data = list->iter;
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369 iter->user_data2 = (gpointer)(intptr_t)n; // list->index
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370 iter->user_data3 = val;
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371
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372 return val ? TRUE : FALSE;
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373 }
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374
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375 gboolean ui_list_model_iter_parent(
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376 GtkTreeModel *tree_model,
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377 GtkTreeIter *iter,
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378 GtkTreeIter *child)
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379 {
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380 return FALSE;
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381 }

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