/* gtktreestore.c * Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include "gtktreemodel.h" #include "gtktreestore.h" #include "gtktreedatalist.h" #include "gtktreednd.h" #include #include #define G_NODE(node) ((GNode *)node) static void gtk_tree_store_init (GtkTreeStore *tree_store); static void gtk_tree_store_class_init (GtkTreeStoreClass *tree_store_class); static void gtk_tree_store_tree_model_init (GtkTreeModelIface *iface); static void gtk_tree_store_drag_source_init(GtkTreeDragSourceIface *iface); static void gtk_tree_store_drag_dest_init (GtkTreeDragDestIface *iface); static guint gtk_tree_store_get_flags (GtkTreeModel *tree_model); static gint gtk_tree_store_get_n_columns (GtkTreeModel *tree_model); static GType gtk_tree_store_get_column_type (GtkTreeModel *tree_model, gint index); static GtkTreePath *gtk_tree_store_get_path (GtkTreeModel *tree_model, GtkTreeIter *iter); static void gtk_tree_store_get_value (GtkTreeModel *tree_model, GtkTreeIter *iter, gint column, GValue *value); static gboolean gtk_tree_store_iter_next (GtkTreeModel *tree_model, GtkTreeIter *iter); static gboolean gtk_tree_store_iter_children (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent); static gboolean gtk_tree_store_iter_has_child (GtkTreeModel *tree_model, GtkTreeIter *iter); static gint gtk_tree_store_iter_n_children (GtkTreeModel *tree_model, GtkTreeIter *iter); static gboolean gtk_tree_store_iter_nth_child (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent, gint n); static gboolean gtk_tree_store_iter_parent (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *child); static gboolean gtk_tree_store_drag_data_delete (GtkTreeDragSource *drag_source, GtkTreePath *path); static gboolean gtk_tree_store_drag_data_get (GtkTreeDragSource *drag_source, GtkTreePath *path, GtkSelectionData *selection_data); static gboolean gtk_tree_store_drag_data_received (GtkTreeDragDest *drag_dest, GtkTreePath *dest, GtkSelectionData *selection_data); static gboolean gtk_tree_store_row_drop_possible (GtkTreeDragDest *drag_dest, GtkTreeModel *src_model, GtkTreePath *src_path, GtkTreePath *dest_path); static void validate_gnode (GNode *node); static inline void validate_tree (GtkTreeStore *tree_store) { if (gtk_debug_flags & GTK_DEBUG_TREE) { g_assert (G_NODE (tree_store->root)->parent == NULL); validate_gnode (G_NODE (tree_store->root)); } } GtkType gtk_tree_store_get_type (void) { static GType tree_store_type = 0; if (!tree_store_type) { static const GTypeInfo tree_store_info = { sizeof (GtkTreeStoreClass), NULL, /* base_init */ NULL, /* base_finalize */ (GClassInitFunc) gtk_tree_store_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkTreeStore), 0, /* n_preallocs */ (GInstanceInitFunc) gtk_tree_store_init }; static const GInterfaceInfo tree_model_info = { (GInterfaceInitFunc) gtk_tree_store_tree_model_init, NULL, NULL }; static const GInterfaceInfo drag_source_info = { (GInterfaceInitFunc) gtk_tree_store_drag_source_init, NULL, NULL }; static const GInterfaceInfo drag_dest_info = { (GInterfaceInitFunc) gtk_tree_store_drag_dest_init, NULL, NULL }; tree_store_type = g_type_register_static (G_TYPE_OBJECT, "GtkTreeStore", &tree_store_info, 0); g_type_add_interface_static (tree_store_type, GTK_TYPE_TREE_MODEL, &tree_model_info); g_type_add_interface_static (tree_store_type, GTK_TYPE_TREE_DRAG_SOURCE, &drag_source_info); g_type_add_interface_static (tree_store_type, GTK_TYPE_TREE_DRAG_DEST, &drag_dest_info); } return tree_store_type; } static void gtk_tree_store_class_init (GtkTreeStoreClass *tree_store_class) { GObjectClass *object_class; object_class = (GObjectClass *) tree_store_class; } static void gtk_tree_store_tree_model_init (GtkTreeModelIface *iface) { iface->get_flags = gtk_tree_store_get_flags; iface->get_n_columns = gtk_tree_store_get_n_columns; iface->get_column_type = gtk_tree_store_get_column_type; iface->get_path = gtk_tree_store_get_path; iface->get_value = gtk_tree_store_get_value; iface->iter_next = gtk_tree_store_iter_next; iface->iter_children = gtk_tree_store_iter_children; iface->iter_has_child = gtk_tree_store_iter_has_child; iface->iter_n_children = gtk_tree_store_iter_n_children; iface->iter_nth_child = gtk_tree_store_iter_nth_child; iface->iter_parent = gtk_tree_store_iter_parent; } static void gtk_tree_store_drag_source_init (GtkTreeDragSourceIface *iface) { iface->drag_data_delete = gtk_tree_store_drag_data_delete; iface->drag_data_get = gtk_tree_store_drag_data_get; } static void gtk_tree_store_drag_dest_init (GtkTreeDragDestIface *iface) { iface->drag_data_received = gtk_tree_store_drag_data_received; iface->row_drop_possible = gtk_tree_store_row_drop_possible; } static void gtk_tree_store_init (GtkTreeStore *tree_store) { tree_store->root = g_node_new (NULL); tree_store->stamp = g_random_int (); } GtkTreeStore * gtk_tree_store_new (void) { return GTK_TREE_STORE (g_object_new (gtk_tree_store_get_type (), NULL)); } GtkTreeStore * gtk_tree_store_new_with_types (gint n_columns, ...) { GtkTreeStore *retval; va_list args; gint i; g_return_val_if_fail (n_columns > 0, NULL); retval = gtk_tree_store_new (); gtk_tree_store_set_n_columns (retval, n_columns); va_start (args, n_columns); for (i = 0; i < n_columns; i++) gtk_tree_store_set_column_type (retval, i, va_arg (args, GType)); va_end (args); return retval; } void gtk_tree_store_set_n_columns (GtkTreeStore *tree_store, gint n_columns) { GType *new_columns; g_return_if_fail (tree_store != NULL); g_return_if_fail (GTK_IS_TREE_STORE (tree_store)); if (tree_store->n_columns == n_columns) return; new_columns = g_new0 (GType, n_columns); if (tree_store->column_headers) { /* copy the old header orders over */ if (n_columns >= tree_store->n_columns) memcpy (new_columns, tree_store->column_headers, tree_store->n_columns * sizeof (gchar *)); else memcpy (new_columns, tree_store->column_headers, n_columns * sizeof (GType)); g_free (tree_store->column_headers); } tree_store->column_headers = new_columns; tree_store->n_columns = n_columns; } void gtk_tree_store_set_column_type (GtkTreeStore *tree_store, gint column, GType type) { g_return_if_fail (tree_store != NULL); g_return_if_fail (GTK_IS_TREE_STORE (tree_store)); g_return_if_fail (column >=0 && column < tree_store->n_columns); tree_store->column_headers[column] = type; } /* fulfill the GtkTreeModel requirements */ /* NOTE: GtkTreeStore::root is a GNode, that acts as the parent node. However, * it is not visible to the tree or to the user., and the path "0" refers to the * first child of GtkTreeStore::root. */ static guint gtk_tree_store_get_flags (GtkTreeModel *tree_model) { g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), 0); return GTK_TREE_MODEL_ITERS_PERSIST; } static gint gtk_tree_store_get_n_columns (GtkTreeModel *tree_model) { g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), 0); return GTK_TREE_STORE (tree_model)->n_columns; } static GType gtk_tree_store_get_column_type (GtkTreeModel *tree_model, gint index) { g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), G_TYPE_INVALID); g_return_val_if_fail (index < GTK_TREE_STORE (tree_model)->n_columns && index >= 0, G_TYPE_INVALID); return GTK_TREE_STORE (tree_model)->column_headers[index]; } static GtkTreePath * gtk_tree_store_get_path (GtkTreeModel *tree_model, GtkTreeIter *iter) { GtkTreePath *retval; GNode *tmp_node; gint i = 0; g_return_val_if_fail (tree_model != NULL, NULL); g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), NULL); g_return_val_if_fail (iter != NULL, NULL); g_return_val_if_fail (iter->user_data != NULL, NULL); validate_tree ((GtkTreeStore*)tree_model); g_assert (G_NODE (iter->user_data)->parent != NULL); if (G_NODE (iter->user_data)->parent == G_NODE (GTK_TREE_STORE (tree_model)->root)) { retval = gtk_tree_path_new (); tmp_node = G_NODE (GTK_TREE_STORE (tree_model)->root)->children; } else { GtkTreeIter tmp_iter = *iter; tmp_iter.user_data = G_NODE (iter->user_data)->parent; retval = gtk_tree_store_get_path (tree_model, &tmp_iter); tmp_node = G_NODE (iter->user_data)->parent->children; } if (retval == NULL) return NULL; if (tmp_node == NULL) { gtk_tree_path_free (retval); return NULL; } for (; tmp_node; tmp_node = tmp_node->next) { if (tmp_node == G_NODE (iter->user_data)) break; i++; } if (tmp_node == NULL) { /* We couldn't find node, meaning it's prolly not ours */ /* Perhaps I should do a g_return_if_fail here. */ gtk_tree_path_free (retval); return NULL; } gtk_tree_path_append_index (retval, i); return retval; } static void gtk_tree_store_get_value (GtkTreeModel *tree_model, GtkTreeIter *iter, gint column, GValue *value) { GtkTreeDataList *list; gint tmp_column = column; g_return_if_fail (tree_model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (tree_model)); g_return_if_fail (iter != NULL); g_return_if_fail (column < GTK_TREE_STORE (tree_model)->n_columns); list = G_NODE (iter->user_data)->data; while (tmp_column-- > 0 && list) list = list->next; if (list) { _gtk_tree_data_list_node_to_value (list, GTK_TREE_STORE (tree_model)->column_headers[column], value); } else { /* We want to return an initialized but empty (default) value */ g_value_init (value, GTK_TREE_STORE (tree_model)->column_headers[column]); } } static gboolean gtk_tree_store_iter_next (GtkTreeModel *tree_model, GtkTreeIter *iter) { g_return_val_if_fail (iter->user_data != NULL, FALSE); if (G_NODE (iter->user_data)->next) { iter->user_data = G_NODE (iter->user_data)->next; return TRUE; } else return FALSE; } static gboolean gtk_tree_store_iter_children (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent) { GNode *children; g_return_val_if_fail (parent == NULL || parent->user_data != NULL, FALSE); if (parent) children = G_NODE (parent->user_data)->children; else children = G_NODE (GTK_TREE_STORE (tree_model)->root)->children; if (children) { iter->stamp = GTK_TREE_STORE (tree_model)->stamp; iter->user_data = children; return TRUE; } else return FALSE; } static gboolean gtk_tree_store_iter_has_child (GtkTreeModel *tree_model, GtkTreeIter *iter) { g_return_val_if_fail (tree_model != NULL, FALSE); g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), FALSE); g_return_val_if_fail (iter != NULL, FALSE); g_return_val_if_fail (iter->user_data != NULL, FALSE); return G_NODE (iter->user_data)->children != NULL; } static gint gtk_tree_store_iter_n_children (GtkTreeModel *tree_model, GtkTreeIter *iter) { GNode *node; gint i = 0; g_return_val_if_fail (tree_model != NULL, 0); g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), 0); g_return_val_if_fail (iter != NULL, FALSE); g_return_val_if_fail (iter->user_data != NULL, FALSE); if (iter == NULL) node = G_NODE (GTK_TREE_STORE (tree_model)->root)->children; else node = G_NODE (iter->user_data)->children; while (node) { i++; node = node->next; } return i; } static gboolean gtk_tree_store_iter_nth_child (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *parent, gint n) { GNode *parent_node; GNode *child; g_return_val_if_fail (tree_model != NULL, FALSE); g_return_val_if_fail (GTK_IS_TREE_STORE (tree_model), FALSE); g_return_val_if_fail (parent == NULL || parent->user_data != NULL, FALSE); if (parent == NULL) parent_node = GTK_TREE_STORE (tree_model)->root; else parent_node = parent->user_data; child = g_node_nth_child (parent_node, n); if (child) { iter->user_data = child; iter->stamp = GTK_TREE_STORE (tree_model)->stamp; return TRUE; } else return FALSE; } static gboolean gtk_tree_store_iter_parent (GtkTreeModel *tree_model, GtkTreeIter *iter, GtkTreeIter *child) { GNode *parent; g_return_val_if_fail (iter != NULL, FALSE); g_return_val_if_fail (iter->user_data != NULL, FALSE); parent = G_NODE (child->user_data)->parent; g_assert (parent != NULL); if (parent != GTK_TREE_STORE (tree_model)->root) { iter->user_data = parent; iter->stamp = GTK_TREE_STORE (tree_model)->stamp; return TRUE; } else return FALSE; } /* * This is a somewhat inelegant function that does a lot of list * manipulations on it's own. */ void gtk_tree_store_set_cell (GtkTreeStore *tree_store, GtkTreeIter *iter, gint column, GValue *value) { GtkTreeDataList *list; GtkTreeDataList *prev; GtkTreePath *path = NULL; g_return_if_fail (tree_store != NULL); g_return_if_fail (GTK_IS_TREE_STORE (tree_store)); g_return_if_fail (column >= 0 && column < tree_store->n_columns); prev = list = G_NODE (iter->user_data)->data; path = gtk_tree_store_get_path (GTK_TREE_MODEL (tree_store), iter); while (list != NULL) { if (column == 0) { _gtk_tree_data_list_value_to_node (list, value); gtk_tree_model_changed (GTK_TREE_MODEL (tree_store), path, iter); gtk_tree_path_free (path); return; } column--; prev = list; list = list->next; } if (G_NODE (iter->user_data)->data == NULL) { G_NODE (iter->user_data)->data = list = _gtk_tree_data_list_alloc (); list->next = NULL; } else { list = prev->next = _gtk_tree_data_list_alloc (); list->next = NULL; } while (column != 0) { list->next = _gtk_tree_data_list_alloc (); list = list->next; list->next = NULL; column --; } _gtk_tree_data_list_value_to_node (list, value); gtk_tree_model_changed (GTK_TREE_MODEL (tree_store), path, iter); gtk_tree_path_free (path); } /** * gtk_tree_store_set_valist: * @tree_store: a #GtkTreeStore * @iter: row to set data for * @var_args: va_list of column/value pairs * * See gtk_tree_store_set(); this version takes a va_list for * use by language bindings. * **/ void gtk_tree_store_set_valist (GtkTreeStore *tree_store, GtkTreeIter *iter, va_list var_args) { gint column; g_return_if_fail (GTK_IS_TREE_STORE (tree_store)); column = va_arg (var_args, gint); while (column != -1) { GValue value = { 0, }; gchar *error = NULL; if (column >= tree_store->n_columns) { g_warning ("%s: Invalid column number %d added to iter (remember to end your list of columns with a -1)", G_STRLOC, column); break; } g_value_init (&value, tree_store->column_headers[column]); G_VALUE_COLLECT (&value, var_args, 0, &error); if (error) { g_warning ("%s: %s", G_STRLOC, error); g_free (error); /* we purposely leak the value here, it might not be * in a sane state if an error condition occoured */ break; } gtk_tree_store_set_cell (tree_store, iter, column, &value); g_value_unset (&value); column = va_arg (var_args, gint); } } /** * gtk_tree_store_set: * @tree_store: a #GtkTreeStore * @iter: row iterator * @Varargs: pairs of column number and value, terminated with -1 * * Sets the value of one or more cells in the row referenced by @iter. * The variable argument list should contain integer column numbers, * each column number followed by the value to be set. For example, * The list is terminated by a -1. For example, to set column 0 with type * %G_TYPE_STRING to "Foo", you would write gtk_tree_store_set (store, iter, * 0, "Foo", -1). **/ void gtk_tree_store_set (GtkTreeStore *tree_store, GtkTreeIter *iter, ...) { va_list var_args; g_return_if_fail (GTK_IS_TREE_STORE (tree_store)); va_start (var_args, iter); gtk_tree_store_set_valist (tree_store, iter, var_args); va_end (var_args); } void gtk_tree_store_remove (GtkTreeStore *model, GtkTreeIter *iter) { GtkTreePath *path; GtkTreeIter new_iter = {0,}; GNode *parent; g_return_if_fail (model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (model)); parent = G_NODE (iter->user_data)->parent; g_assert (parent != NULL); if (G_NODE (iter->user_data)->data) _gtk_tree_data_list_free ((GtkTreeDataList *) G_NODE (iter->user_data)->data, model->column_headers); path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter); g_node_destroy (G_NODE (iter->user_data)); model->stamp++; gtk_tree_model_deleted (GTK_TREE_MODEL (model), path); if (parent != G_NODE (model->root) && parent->children == NULL) { gtk_tree_path_up (path); new_iter.stamp = model->stamp; new_iter.user_data = parent; gtk_tree_model_child_toggled (GTK_TREE_MODEL (model), path, &new_iter); } gtk_tree_path_free (path); } void gtk_tree_store_insert (GtkTreeStore *model, GtkTreeIter *iter, GtkTreeIter *parent, gint position) { GtkTreePath *path; GNode *parent_node; g_return_if_fail (model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (model)); if (parent) parent_node = parent->user_data; else parent_node = model->root; iter->stamp = model->stamp; iter->user_data = g_node_new (NULL); g_node_insert (parent_node, position, G_NODE (iter->user_data)); path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter); gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter); gtk_tree_path_free (path); validate_tree ((GtkTreeStore*)model); } void gtk_tree_store_insert_before (GtkTreeStore *model, GtkTreeIter *iter, GtkTreeIter *parent, GtkTreeIter *sibling) { GtkTreePath *path; GNode *parent_node = NULL; GNode *new_node; g_return_if_fail (model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (model)); g_return_if_fail (iter != NULL); new_node = g_node_new (NULL); if (parent == NULL && sibling == NULL) parent_node = model->root; else if (parent == NULL) parent_node = G_NODE (sibling->user_data)->parent; else if (sibling == NULL) parent_node = G_NODE (parent->user_data); else { g_return_if_fail (G_NODE (sibling->user_data)->parent == G_NODE (parent->user_data)); parent_node = G_NODE (parent->user_data); } g_node_insert_before (parent_node, sibling ? G_NODE (sibling->user_data) : NULL, new_node); iter->stamp = model->stamp; iter->user_data = new_node; path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter); gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter); gtk_tree_path_free (path); validate_tree ((GtkTreeStore*)model); } void gtk_tree_store_insert_after (GtkTreeStore *model, GtkTreeIter *iter, GtkTreeIter *parent, GtkTreeIter *sibling) { GtkTreePath *path; GNode *parent_node; GNode *new_node; g_return_if_fail (model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (model)); g_return_if_fail (iter != NULL); new_node = g_node_new (NULL); if (parent == NULL && sibling == NULL) parent_node = model->root; else if (parent == NULL) parent_node = G_NODE (sibling->user_data)->parent; else if (sibling == NULL) parent_node = G_NODE (parent->user_data); else { g_return_if_fail (G_NODE (sibling->user_data)->parent == G_NODE (parent->user_data)); parent_node = G_NODE (parent->user_data); } g_node_insert_after (parent_node, sibling ? G_NODE (sibling->user_data) : NULL, new_node); iter->stamp = model->stamp; iter->user_data = new_node; path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter); gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter); gtk_tree_path_free (path); validate_tree ((GtkTreeStore*)model); } void gtk_tree_store_prepend (GtkTreeStore *model, GtkTreeIter *iter, GtkTreeIter *parent) { GNode *parent_node; g_return_if_fail (model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (model)); g_return_if_fail (iter != NULL); if (parent == NULL) parent_node = model->root; else parent_node = parent->user_data; if (parent_node->children == NULL) { GtkTreePath *path; iter->stamp = model->stamp; iter->user_data = g_node_new (NULL); g_node_prepend (parent_node, iter->user_data); if (parent_node != model->root) { path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), parent); gtk_tree_model_child_toggled (GTK_TREE_MODEL (model), path, parent); gtk_tree_path_append_index (path, 0); } else { path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter); } gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter); gtk_tree_path_free (path); } else { gtk_tree_store_insert_after (model, iter, parent, NULL); } validate_tree ((GtkTreeStore*)model); } void gtk_tree_store_append (GtkTreeStore *model, GtkTreeIter *iter, GtkTreeIter *parent) { GNode *parent_node; g_return_if_fail (model != NULL); g_return_if_fail (GTK_IS_TREE_STORE (model)); g_return_if_fail (iter != NULL); if (parent == NULL) parent_node = model->root; else parent_node = parent->user_data; if (parent_node->children == NULL) { GtkTreePath *path; iter->stamp = model->stamp; iter->user_data = g_node_new (NULL); g_node_append (parent_node, G_NODE (iter->user_data)); if (parent_node != model->root) { path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), parent); gtk_tree_model_child_toggled (GTK_TREE_MODEL (model), path, parent); gtk_tree_path_append_index (path, 0); } else { path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter); } gtk_tree_model_inserted (GTK_TREE_MODEL (model), path, iter); gtk_tree_path_free (path); } else { gtk_tree_store_insert_before (model, iter, parent, NULL); } validate_tree ((GtkTreeStore*)model); } gboolean gtk_tree_store_is_ancestor (GtkTreeStore *model, GtkTreeIter *iter, GtkTreeIter *descendant) { g_return_val_if_fail (model != NULL, FALSE); g_return_val_if_fail (GTK_IS_TREE_STORE (model), FALSE); g_return_val_if_fail (iter != NULL, FALSE); g_return_val_if_fail (descendant != NULL, FALSE); return g_node_is_ancestor (G_NODE (iter->user_data), G_NODE (descendant->user_data)); } gint gtk_tree_store_iter_depth (GtkTreeStore *model, GtkTreeIter *iter) { g_return_val_if_fail (model != NULL, 0); g_return_val_if_fail (GTK_IS_TREE_STORE (model), 0); g_return_val_if_fail (iter != NULL, 0); return g_node_depth (G_NODE (iter->user_data)) - 1; } /* DND */ static gboolean gtk_tree_store_drag_data_delete (GtkTreeDragSource *drag_source, GtkTreePath *path) { GtkTreeIter iter; g_return_val_if_fail (GTK_IS_TREE_STORE (drag_source), FALSE); if (gtk_tree_model_get_iter (GTK_TREE_MODEL (drag_source), &iter, path)) { gtk_tree_store_remove (GTK_TREE_STORE (drag_source), &iter); return TRUE; } else { return FALSE; } } static gboolean gtk_tree_store_drag_data_get (GtkTreeDragSource *drag_source, GtkTreePath *path, GtkSelectionData *selection_data) { g_return_val_if_fail (GTK_IS_TREE_STORE (drag_source), FALSE); /* Note that we don't need to handle the GTK_TREE_MODEL_ROW * target, because the default handler does it for us, but * we do anyway for the convenience of someone maybe overriding the * default handler. */ if (gtk_selection_data_set_tree_row (selection_data, GTK_TREE_MODEL (drag_source), path)) { return TRUE; } else { /* FIXME handle text targets at least. */ } return FALSE; } static void copy_node_data (GtkTreeStore *tree_store, GtkTreeIter *src_iter, GtkTreeIter *dest_iter) { GtkTreeDataList *dl = G_NODE (src_iter->user_data)->data; GtkTreeDataList *copy_head = NULL; GtkTreeDataList *copy_prev = NULL; GtkTreeDataList *copy_iter = NULL; GtkTreePath *path; gint col; col = 0; while (dl) { copy_iter = _gtk_tree_data_list_node_copy (dl, tree_store->column_headers[col]); if (copy_head == NULL) copy_head = copy_iter; if (copy_prev) copy_prev->next = copy_iter; copy_prev = copy_iter; dl = dl->next; ++col; } G_NODE (dest_iter->user_data)->data = copy_head; path = gtk_tree_store_get_path (tree_store, dest_iter); gtk_tree_model_changed (GTK_TREE_MODEL (tree_store), path, dest_iter); gtk_tree_path_free (path); } static void recursive_node_copy (GtkTreeStore *tree_store, GtkTreeIter *src_iter, GtkTreeIter *dest_iter) { GtkTreeIter child; GtkTreeModel *model; model = GTK_TREE_MODEL (tree_store); copy_node_data (tree_store, src_iter, dest_iter); if (gtk_tree_model_iter_children (model, &child, src_iter)) { /* Need to create children and recurse. Note our * dependence on persistent iterators here. */ do { GtkTreeIter copy; /* Gee, a really slow algorithm... ;-) FIXME */ gtk_tree_store_append (tree_store, ©, dest_iter); recursive_node_copy (tree_store, &child, ©); } while (gtk_tree_model_iter_next (model, &child)); } } static gboolean gtk_tree_store_drag_data_received (GtkTreeDragDest *drag_dest, GtkTreePath *dest, GtkSelectionData *selection_data) { GtkTreeModel *tree_model; GtkTreeStore *tree_store; GtkTreeModel *src_model = NULL; GtkTreePath *src_path = NULL; gboolean retval = FALSE; g_return_val_if_fail (GTK_IS_TREE_STORE (drag_dest), FALSE); tree_model = GTK_TREE_MODEL (drag_dest); tree_store = GTK_TREE_STORE (drag_dest); validate_tree (tree_store); if (gtk_selection_data_get_tree_row (selection_data, &src_model, &src_path) && src_model == tree_model) { /* Copy the given row to a new position */ GtkTreeIter src_iter; GtkTreeIter dest_iter; GtkTreePath *prev; if (!gtk_tree_model_get_iter (src_model, &src_iter, src_path)) { goto out; } /* Get the path to insert _after_ (dest is the path to insert _before_) */ prev = gtk_tree_path_copy (dest); if (!gtk_tree_path_prev (prev)) { GtkTreeIter dest_parent; GtkTreePath *parent; GtkTreeIter *dest_parent_p; /* dest was the first spot at the current depth; which means * we are supposed to prepend. */ /* Get the parent, NULL if parent is the root */ dest_parent_p = NULL; parent = gtk_tree_path_copy (dest); if (gtk_tree_path_up (parent)) { gtk_tree_model_get_iter (tree_model, &dest_parent, parent); dest_parent_p = &dest_parent; } gtk_tree_path_free (parent); parent = NULL; gtk_tree_store_prepend (GTK_TREE_STORE (tree_model), &dest_iter, dest_parent_p); retval = TRUE; } else { if (gtk_tree_model_get_iter (GTK_TREE_MODEL (tree_model), &dest_iter, prev)) { GtkTreeIter tmp_iter = dest_iter; gtk_tree_store_insert_after (GTK_TREE_STORE (tree_model), &dest_iter, NULL, &tmp_iter); retval = TRUE; } } gtk_tree_path_free (prev); /* If we succeeded in creating dest_iter, walk src_iter tree branch, * duplicating it below dest_iter. */ if (retval) { recursive_node_copy (tree_store, &src_iter, &dest_iter); } } else { /* FIXME maybe add some data targets eventually, or handle text * targets in the simple case. */ } out: if (src_path) gtk_tree_path_free (src_path); return retval; } static gboolean gtk_tree_store_row_drop_possible (GtkTreeDragDest *drag_dest, GtkTreeModel *src_model, GtkTreePath *src_path, GtkTreePath *dest_path) { /* can only drag to ourselves */ if (src_model != GTK_TREE_MODEL (drag_dest)) return FALSE; /* Can't drop into ourself. */ if (gtk_tree_path_is_ancestor (src_path, dest_path)) return FALSE; /* Can't drop if dest_path's parent doesn't exist */ { GtkTreeIter iter; GtkTreePath *tmp = gtk_tree_path_copy (dest_path); /* if we can't go up, we know the parent exists, the root * always exists. */ if (gtk_tree_path_up (tmp)) { if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (drag_dest), &iter, tmp)) { if (tmp) gtk_tree_path_free (tmp); return FALSE; } } if (tmp) gtk_tree_path_free (tmp); } /* Can otherwise drop anywhere. */ return TRUE; } static void validate_gnode (GNode* node) { GNode *iter; iter = node->children; while (iter != NULL) { g_assert (iter->parent == node); if (iter->prev) g_assert (iter->prev->next == iter); validate_gnode (iter); iter = iter->next; } }