/* gtktreestore.c
* Copyright (C) 2000 Red Hat, Inc., Jonathan Blandford <jrb@redhat.com>
*
* 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 "gtksignal.h"
#include <string.h>
#include <gobject/gvaluecollector.h>
#define G_NODE(node) ((GNode *)node)
enum {
CHANGED,
INSERTED,
CHILD_TOGGLED,
DELETED,
LAST_SIGNAL
};
static guint tree_store_signals[LAST_SIGNAL] = { 0 };
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 GtkType 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 (GTK_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)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass *) tree_store_class;
tree_store_signals[CHANGED] =
gtk_signal_new ("changed",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTreeStoreClass, changed),
gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2,
GTK_TYPE_TREE_PATH,
GTK_TYPE_TREE_ITER);
tree_store_signals[INSERTED] =
gtk_signal_new ("inserted",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTreeStoreClass, inserted),
gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2,
GTK_TYPE_TREE_PATH,
GTK_TYPE_TREE_ITER);
tree_store_signals[CHILD_TOGGLED] =
gtk_signal_new ("child_toggled",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTreeStoreClass, child_toggled),
gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2,
GTK_TYPE_TREE_PATH,
GTK_TYPE_TREE_ITER);
tree_store_signals[DELETED] =
gtk_signal_new ("deleted",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTreeStoreClass, deleted),
gtk_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
GTK_TYPE_TREE_PATH);
}
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 (gtk_type_new (gtk_tree_store_get_type ()));
}
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;
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;
while (list != NULL)
{
if (column == 0)
{
_gtk_tree_data_list_value_to_node (list, value);
gtk_signal_emit_by_name (GTK_OBJECT (tree_store),
"changed",
NULL, iter);
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_signal_emit_by_name (GTK_OBJECT (tree_store),
"changed",
NULL, iter);
}
/**
* 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;
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_signal_emit_by_name (GTK_OBJECT (model),
"deleted",
path);
if (parent != G_NODE (model->root) && parent->children == NULL)
{
gtk_tree_path_up (path);
gtk_signal_emit_by_name (GTK_OBJECT (model),
"child_toggled",
path,
parent);
}
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_signal_emit_by_name (GTK_OBJECT (model),
"inserted",
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_signal_emit_by_name (GTK_OBJECT (model),
"inserted",
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_signal_emit_by_name (GTK_OBJECT (model),
"inserted",
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_signal_emit_by_name (GTK_OBJECT (model),
"child_toggled",
path,
parent);
gtk_tree_path_append_index (path, 0);
}
else
{
path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter);
}
gtk_signal_emit_by_name (GTK_OBJECT (model),
"inserted",
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_signal_emit_by_name (GTK_OBJECT (model),
"child_toggled",
path,
parent);
gtk_tree_path_append_index (path, 0);
}
else
{
path = gtk_tree_store_get_path (GTK_TREE_MODEL (model), iter);
}
gtk_signal_emit_by_name (GTK_OBJECT (model),
"inserted",
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;
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;
gtk_signal_emit_by_name (GTK_OBJECT (tree_store),
"changed",
NULL, dest_iter);
}
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;
}
}