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PORe-using an existing GtkTreeView
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  1. PORe-using an existing GtkTreeView
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    copied!<p><strong>TL;DR:</strong> <code>assertion 'VALID_ITER (parent, tree_store)' failed</code>. How do I fix it?</p> <p>I've successfully displayed a GtkTreeView in my application with the following (trimmed) code:</p> <pre><code>enum { DISPLAY_COLUMN, N_COLUMNS }; GValue comment = G_VALUE_INIT; GValue amount = G_VALUE_INIT; GtkTreeIter toplevel, child; GtkTreeStore *treestore = gtk_tree_store_new(N_COLUMNS, G_TYPE_STRING); for(int step = 0; step &lt; recipe_count; step++) { g_value_init(&amp;comment, G_TYPE_STRING); g_value_set_string(&amp;comment, recipe[step].comment); gtk_tree_store_append(treestore, &amp;toplevel, NULL); gtk_tree_store_set_value(treestore, &amp;toplevel, COMMENT_COLUMN, &amp;comment ); g_value_init(&amp;amount, G_TYPE_STRING); g_value_set_string(&amp;amount, recipe[step].amount); gtk_tree_store_append(treestore, &amp;toplevel, &amp;child); gtk_tree_store_set_value(treestore, &amp;toplevel, COMMENT_COLUMN, &amp;amount ); g_value_unset(&amp;amount); g_value_unset(&amp;comment); } gtk_tree_view_set_model(GTK_TREE_VIEW(app-&gt;step_tree),GTK_TREE_MODEL(treestore)); GtkCellRenderer *renderer = gtk_cell_renderer_text_new(); GtkTreeViewColumn *column = gtk_tree_view_column_new_with_attributes ("Step", renderer, "text", DISPLAY_COLUMN, NULL); gtk_tree_view_append_column(GTK_TREE_VIEW(app-&gt;step_tree), column); </code></pre> <p>All of the above is wrapped up in a function, so that I can load new data again later. However, the second time I try to </p> <pre><code>(recipe_editor:11451): Gtk-CRITICAL **: IA__gtk_tree_store_append: assertion `VALID_ITER (parent, tree_store)' failed (recipe_editor:11451): Gtk-CRITICAL **: IA__gtk_tree_store_set_value: assertion `VALID_ITER (iter, tree_store)' failed </code></pre> <p>I know this means there's something wrong with my iterator(s), but I'm not sure how to actually fix it.</p>
 

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