ui/gtk/model.c

Sun, 19 Nov 2017 09:00:16 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 19 Nov 2017 09:00:16 +0100
changeset 147
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parent 146
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child 152
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permissions
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adds simple drag and drop support (GTK)

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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 #include "toolkit.h"
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35
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36 #define IS_UI_LIST_MODEL(obj) \
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37 (G_TYPE_CHECK_INSTANCE_TYPE((obj), list_model_type))
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38 #define UI_LIST_MODEL(obj) \
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39 (G_TYPE_CHECK_INSTANCE_CAST((obj), list_model_type, UiListModel))
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40
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41 static void list_model_class_init(GObjectClass *cl, gpointer data);
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42 static void list_model_interface_init(GtkTreeModelIface *i, gpointer data);
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43 static void list_model_init(UiListModel *instance, GObjectClass *cl);
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44
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45 static void list_model_dnd_dest_interface_init(GtkTreeDragDestIface *i, gpointer data);
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46 static void list_model_dnd_src_interface_init(GtkTreeDragSourceIface *i, gpointer data);
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47
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48 static GObjectClass list_model_class;
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49 static const GTypeInfo list_model_info = {
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50 sizeof(GObjectClass),
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51 NULL,
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52 NULL,
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53 (GClassInitFunc)list_model_class_init,
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54 NULL,
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55 NULL,
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56 sizeof(UiListModel),
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57 0,
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58 (GInstanceInitFunc)list_model_init
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59 };
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60 static const GInterfaceInfo list_model_interface_info = {
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61 (GInterfaceInitFunc)list_model_interface_init,
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62 NULL,
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63 NULL
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64 };
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65 static GType list_model_type;
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66
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67 static const GInterfaceInfo list_model_dnd_dest_interface_info = {
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68 (GInterfaceInitFunc)list_model_dnd_dest_interface_init,
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69 NULL,
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70 NULL
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71 };
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72 static const GInterfaceInfo list_model_dnd_src_interface_info = {
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73 (GInterfaceInitFunc)list_model_dnd_src_interface_init,
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74 NULL,
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75 NULL
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76 };
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77
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78 void ui_list_init() {
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79 list_model_type = g_type_register_static(
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80 G_TYPE_OBJECT,
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81 "UiListModel",
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82 &list_model_info,
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83 (GTypeFlags)0);
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84 g_type_add_interface_static(
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85 list_model_type,
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86 GTK_TYPE_TREE_MODEL,
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87 &list_model_interface_info);
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88 g_type_add_interface_static(
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89 list_model_type,
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90 GTK_TYPE_TREE_DRAG_DEST,
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91 &list_model_dnd_dest_interface_info);
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92 g_type_add_interface_static(
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93 list_model_type,
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94 GTK_TYPE_TREE_DRAG_SOURCE,
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95 &list_model_dnd_src_interface_info);
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96 }
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97
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98 static void list_model_class_init(GObjectClass *cl, gpointer data) {
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99 //cl->finalize = ...; // TODO
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100
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101 }
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102
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103 static void list_model_interface_init(GtkTreeModelIface *i, gpointer data) {
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104 i->get_flags = ui_list_model_get_flags;
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105 i->get_n_columns = ui_list_model_get_n_columns;
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106 i->get_column_type = ui_list_model_get_column_type;
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107 i->get_iter = ui_list_model_get_iter;
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108 i->get_path = ui_list_model_get_path;
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109 i->get_value = ui_list_model_get_value;
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110 i->iter_next = ui_list_model_iter_next;
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111 i->iter_children = ui_list_model_iter_children;
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112 i->iter_has_child = ui_list_model_iter_has_child;
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113 i->iter_n_children = ui_list_model_iter_n_children;
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114 i->iter_nth_child = ui_list_model_iter_nth_child;
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115 i->iter_parent = ui_list_model_iter_parent;
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116 }
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117
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118 static void list_model_dnd_dest_interface_init(GtkTreeDragDestIface *i, gpointer data) {
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119 i->drag_data_received = ui_list_model_drag_data_received;
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120 i->row_drop_possible = ui_list_model_row_drop_possible;
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121 }
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122
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123 static void list_model_dnd_src_interface_init(GtkTreeDragSourceIface *i, gpointer data) {
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124 i->drag_data_delete = ui_list_model_drag_data_delete;
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125 i->drag_data_get = ui_list_model_drag_data_get;
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126 i->row_draggable = ui_list_model_row_draggable;
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127 }
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128
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129 static void list_model_init(UiListModel *instance, GObjectClass *cl) {
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130 instance->columntypes = NULL;
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131 instance->var = NULL;
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132 instance->numcolumns = 0;
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133 instance->stamp = g_random_int();
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134 }
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135
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136 static GType ui_gtk_type(UiModelType type) {
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137 switch(type) {
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138 case UI_STRING: return G_TYPE_STRING;
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139 case UI_INTEGER: return G_TYPE_INT;
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140 }
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141 return G_TYPE_INVALID;
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142 }
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143
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144 static void ui_model_set_value(GType type, void *data, GValue *value) {
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145 switch(type) {
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146 case G_TYPE_OBJECT: {
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147 value->g_type = G_TYPE_OBJECT;
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148 g_value_set_object(value, data);
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149 return;
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150 }
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151 case G_TYPE_STRING: {
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152 value->g_type = G_TYPE_STRING;
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153 g_value_set_string(value, data);
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154 return;
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155 }
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156 case G_TYPE_INT: {
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157 value->g_type = G_TYPE_INT;
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158 int *i = data;
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159 g_value_set_int(value, *i);
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160 return;
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161 }
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162 }
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163 value->g_type = G_TYPE_INVALID;
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164 }
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165
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166 UiListModel* ui_list_model_new(UiObject *obj, UiVar *var, UiModel *info) {
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167 UiListModel *model = g_object_new(list_model_type, NULL);
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168 model->obj = obj;
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169 model->model = info;
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170 model->var = var;
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171 model->columntypes = calloc(sizeof(GType), 2 * info->columns);
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172 int ncol = 0;
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173 for(int i=0;i<info->columns;i++) {
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174 UiModelType type = info->types[i];
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175 if(type == UI_ICON_TEXT) {
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176 model->columntypes[ncol] = G_TYPE_OBJECT;
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177 ncol++;
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178 model->columntypes[ncol] = G_TYPE_STRING;
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179 } else {
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180 model->columntypes[ncol] = ui_gtk_type(info->types[i]);
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181 }
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182 ncol++;
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183 }
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184 model->numcolumns = ncol;
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185 return model;
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186 }
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187
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188
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189 GtkTreeModelFlags ui_list_model_get_flags(GtkTreeModel *tree_model) {
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190 return (GTK_TREE_MODEL_LIST_ONLY | GTK_TREE_MODEL_ITERS_PERSIST);
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191 }
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192
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193 gint ui_list_model_get_n_columns(GtkTreeModel *tree_model) {
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194 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), 0);
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195 UiListModel *model = UI_LIST_MODEL(tree_model);
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196 return model->numcolumns;
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197 }
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198
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199 GType ui_list_model_get_column_type(GtkTreeModel *tree_model, gint index) {
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200 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), G_TYPE_INVALID);
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201 UiListModel *model = UI_LIST_MODEL(tree_model);
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202 g_return_val_if_fail(index < model->numcolumns, G_TYPE_INVALID);
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203 return model->columntypes[index];
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204 }
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205
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206 gboolean ui_list_model_get_iter(
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207 GtkTreeModel *tree_model,
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208 GtkTreeIter *iter,
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209 GtkTreePath *path)
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210 {
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211 g_assert(IS_UI_LIST_MODEL(tree_model));
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212 UiListModel *model = UI_LIST_MODEL(tree_model);
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213 UiList *list = model->var->value;
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214
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215 // check the depth of the path
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216 // a list must have a depth of 1
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217 gint depth = gtk_tree_path_get_depth(path);
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218 g_assert(depth == 1);
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219
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220 // get row
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221 gint *indices = gtk_tree_path_get_indices(path);
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222 gint row = indices[0];
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223
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224 // check row
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225 if(row == 0) {
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226 // we don't need to count if the first element is requested
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227 if(list->first(list) == NULL) {
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228 return FALSE;
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229 }
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230 } else if(row >= list->count(list)) {
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231 return FALSE;
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232 }
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233
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234 // the UiList has an integrated iterator
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235 // we only get a value to adjust it
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236 void *val = NULL;
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237 if(row == 0) {
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238 val = list->first(list);
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239 } else {
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240 val = list->get(list, row);
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241 }
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242
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243 iter->stamp = model->stamp;
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244 iter->user_data = list->iter;
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245 iter->user_data2 = (gpointer)(intptr_t)row; // list->index
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246 iter->user_data3 = val;
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247
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248 return val ? TRUE : FALSE;
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249 }
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250
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251 GtkTreePath* ui_list_model_get_path(
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252 GtkTreeModel *tree_model,
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253 GtkTreeIter *iter)
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254 {
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255 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), NULL);
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256 g_return_val_if_fail(iter != NULL, NULL);
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257 g_return_val_if_fail(iter->user_data != NULL, NULL);
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258
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259 UiListModel *model = UI_LIST_MODEL(tree_model);
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260
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261 GtkTreePath *path = gtk_tree_path_new();
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262 gtk_tree_path_append_index(path, (int)(intptr_t)iter->user_data2); // list->index
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263
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264 return path;
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265 }
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266
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267 void ui_list_model_get_value(
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268 GtkTreeModel *tree_model,
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269 GtkTreeIter *iter,
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270 gint column,
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271 GValue *value)
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272 {
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273 g_return_if_fail(IS_UI_LIST_MODEL(tree_model));
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274 g_return_if_fail(iter != NULL);
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275 g_return_if_fail(iter->user_data != NULL);
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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
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280 g_return_if_fail(column < model->numcolumns);
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281
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282 // TODO: return correct value from column
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283
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284 //value->g_type = G_TYPE_STRING;
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285 list->iter = iter->user_data;
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286 //list->index = (int)(intptr_t)iter->user_data2;
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287 //list->current = iter->user_data3;
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288 if(model->model->getvalue) {
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289 void *data = model->model->getvalue(iter->user_data3, column);
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290 if(model->columntypes[column] == G_TYPE_OBJECT) {
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291 UiImage *img = data;
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292 ui_model_set_value(model->columntypes[column], img->pixbuf, value);
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293 } else {
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294 ui_model_set_value(model->columntypes[column], data, value);
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295 }
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296 } else {
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297 value->g_type = G_TYPE_INVALID;
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298 }
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299 }
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300
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301 gboolean ui_list_model_iter_next(
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302 GtkTreeModel *tree_model,
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303 GtkTreeIter *iter)
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304 {
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305 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), FALSE);
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306 g_return_val_if_fail(iter != NULL, FALSE);
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307 //g_return_val_if_fail(iter->user_data != NULL, FALSE);
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308
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309 if(!iter->user_data) {
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310 return FALSE;
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311 }
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312
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313 UiListModel *model = UI_LIST_MODEL(tree_model);
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314 UiList *list = model->var->value;
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315 list->iter = iter->user_data;
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316 //list->index = (int)(intptr_t)iter->user_data2;
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317 void *val = list->next(list);
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318 iter->user_data = list->iter;
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319 intptr_t index = (intptr_t)iter->user_data2;
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320 index++;
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321 //iter->user_data2 = (gpointer)(intptr_t)list->index;
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322 iter->user_data2 = (gpointer)index;
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323 iter->user_data3 = val;
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324 return val ? TRUE : FALSE;
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325 }
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326
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327 gboolean ui_list_model_iter_children(
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328 GtkTreeModel *tree_model,
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329 GtkTreeIter *iter,
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330 GtkTreeIter *parent)
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331 {
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332 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), FALSE);
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333
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334 UiListModel *model = UI_LIST_MODEL(tree_model);
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335 UiList *list = model->var->value;
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336
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337 if(parent) {
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338 return FALSE;
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339 }
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340
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341 /*
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342 * a list element has no children
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343 * we set the iter to the first element
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344 */
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345 void *val = list->first(list);
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346 iter->stamp = model->stamp;
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347 iter->user_data = list->iter;
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348 iter->user_data2 = (gpointer)0;
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349 iter->user_data3 = val;
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350
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351 return val ? TRUE : FALSE;
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352 }
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353
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354 gboolean ui_list_model_iter_has_child(
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355 GtkTreeModel *tree_model,
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356 GtkTreeIter *iter)
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357 {
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358 return FALSE;
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359 }
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360
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361 gint ui_list_model_iter_n_children(
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362 GtkTreeModel *tree_model,
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363 GtkTreeIter *iter)
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364 {
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365 g_assert(IS_UI_LIST_MODEL(tree_model));
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366
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367 if(!iter) {
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368 // return number of rows
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369 UiListModel *model = UI_LIST_MODEL(tree_model);
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370 UiList *list = model->var->value;
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371 return list->count(list);
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372 }
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373
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374 return 0;
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375 }
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376
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377 gboolean ui_list_model_iter_nth_child(
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378 GtkTreeModel *tree_model,
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379 GtkTreeIter *iter,
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380 GtkTreeIter *parent,
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381 gint n)
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382 {
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383 g_return_val_if_fail(IS_UI_LIST_MODEL(tree_model), FALSE);
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384
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385 if(parent) {
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386 return FALSE;
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387 }
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388
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389 UiListModel *model = UI_LIST_MODEL(tree_model);
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390 UiList *list = model->var->value;
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391
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392 // check n
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393 if(n == 0) {
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394 // we don't need to count if the first element is requested
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395 if(list->first(list) == NULL) {
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396 return FALSE;
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397 }
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398 } else if(n >= list->count(list)) {
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399 return FALSE;
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400 }
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401
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402 void *val = list->get(list, n);
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403 iter->stamp = model->stamp;
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404 iter->user_data = list->iter;
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405 iter->user_data2 = (gpointer)(intptr_t)n; // list->index
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406 iter->user_data3 = val;
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407
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408 return val ? TRUE : FALSE;
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409 }
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410
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411 gboolean ui_list_model_iter_parent(
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412 GtkTreeModel *tree_model,
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413 GtkTreeIter *iter,
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414 GtkTreeIter *child)
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415 {
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416 return FALSE;
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417 }
147
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418
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419 // ****** dnd ******
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420
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421 gboolean ui_list_model_drag_data_received(
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422 GtkTreeDragDest *drag_dest,
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423 GtkTreePath *dest_path,
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424 GtkSelectionData *selection_data)
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425 {
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426 //printf("drag received\n");
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427 UiListModel *model = UI_LIST_MODEL(drag_dest);
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428 if(model->model->drop) {
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429 gint *indices = gtk_tree_path_get_indices(dest_path);
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430 gint row = indices[0];
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431 UiEvent e;
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432 e.obj = model->obj;
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433 e.window = e.obj->window;
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434 e.document = e.obj->ctx->document;
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435 e.eventdata = NULL;
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436 e.intval = 0;
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437 UiSelection s;
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438 s.data = selection_data;
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439 model->model->drop(&e, &s, model->var->value, row);
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440 }
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441 return TRUE;
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442 }
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443
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diff changeset
444 gboolean ui_list_model_row_drop_possible(
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445 GtkTreeDragDest *drag_dest,
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446 GtkTreePath *dest_path,
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447 GtkSelectionData *selection_data)
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448 {
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449 //printf("row_drop_possible\n");
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450 UiListModel *model = UI_LIST_MODEL(drag_dest);
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451 if(model->model->candrop) {
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452 gint *indices = gtk_tree_path_get_indices(dest_path);
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453 gint row = indices[0];
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454 UiEvent e;
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455 e.obj = model->obj;
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456 e.window = e.obj->window;
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457 e.document = e.obj->ctx->document;
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458 e.eventdata = NULL;
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459 e.intval = 0;
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460 UiSelection s;
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461 s.data = selection_data;
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462 return model->model->candrop(&e, &s, model->var->value, row);
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463 }
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464 return TRUE;
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465 }
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466
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467 gboolean ui_list_model_row_draggable(
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468 GtkTreeDragSource *drag_source,
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469 GtkTreePath *path)
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470 {
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471 //printf("row_draggable\n");
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472 UiListModel *model = UI_LIST_MODEL(drag_source);
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473 if(model->model->candrag) {
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474 gint *indices = gtk_tree_path_get_indices(path);
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475 gint row = indices[0];
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476 UiEvent e;
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477 e.obj = model->obj;
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478 e.window = e.obj->window;
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479 e.document = e.obj->ctx->document;
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480 e.eventdata = NULL;
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481 e.intval = 0;
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482 return model->model->candrag(&e, model->var->value, row);
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483 }
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484 return TRUE;
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485 }
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486
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487 gboolean ui_list_model_drag_data_get(
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488 GtkTreeDragSource *drag_source,
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489 GtkTreePath *path,
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490 GtkSelectionData *selection_data)
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491 {
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492 //printf("drag_data_get\n");
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493 UiListModel *model = UI_LIST_MODEL(drag_source);
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494 if(model->model->data_get) {
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495 gint *indices = gtk_tree_path_get_indices(path);
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496 gint row = indices[0];
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497 UiEvent e;
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498 e.obj = model->obj;
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499 e.window = e.obj->window;
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500 e.document = e.obj->ctx->document;
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501 e.eventdata = NULL;
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502 e.intval = 0;
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503 UiSelection s;
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504 s.data = selection_data;
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505 model->model->data_get(&e, &s, model->var->value, row);
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506 }
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507 return TRUE;
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508 }
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509
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510 gboolean ui_list_model_drag_data_delete(
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511 GtkTreeDragSource *drag_source,
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512 GtkTreePath *path)
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513 {
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514 //printf("drag_data_delete\n");
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515 UiListModel *model = UI_LIST_MODEL(drag_source);
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516 if(model->model->data_get) {
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517 gint *indices = gtk_tree_path_get_indices(path);
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518 gint row = indices[0];
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519 UiEvent e;
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520 e.obj = model->obj;
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521 e.window = e.obj->window;
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522 e.document = e.obj->ctx->document;
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523 e.eventdata = NULL;
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524 e.intval = 0;
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525 model->model->data_delete(&e, model->var->value, row);
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526 }
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527 return TRUE;
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528 }

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