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gtk2/gtk/gtkliststore.c
Havoc Pennington 5cd2993201 fix bug in here where prev pointer was set to the wrong thing 
2001-01-30  Havoc Pennington  <hp@redhat.com>

	* gtk/gtkliststore.c (gtk_list_store_insert_before): fix bug in
	here where prev pointer was set to the wrong thing

	* gtk/gtktreemodel.c (gtk_tree_path_is_ancestor): new function
	(gtk_tree_path_is_descendant): new function

	* gtk/gtkliststore.c (gtk_list_store_iter_n_children): return
	cached length
	(gtk_list_store_get_iter): don't modify iter if we can't get the
	path.

	* gtk/gtkliststore.h (struct _GtkListStore): cache the length

	* gtk/gtktreednd.h: add virtual function row_drop_possible() to
	GtkTreeDragDest

	* gtk/gtktreestore.c (copy_node_data): fix varargs type error that
	was causing segfault

	* gtk/gtktreedatalist.c (_gtk_tree_data_list_node_copy): set next
	pointer to NULL

	* gtk/gtktreestore.c (gtk_tree_store_append): fix memleak

	* gtk/gtkliststore.c (gtk_list_store_iter_next): don't modify iter
	on returning FALSE
	(gtk_list_store_iter_children): ditto
	(gtk_list_store_iter_nth_child): ditto
	(gtk_list_store_iter_nth_child): ditto
	(gtk_list_store_iter_parent): ditto

	* gtk/gtktreestore.c (gtk_tree_store_get_path): g_return_if_fail
	on iter->user_data != NULL instead of silently accepting it.
	(gtk_tree_store_iter_next): ditto. Also, don't modify iter unless
	we are returning TRUE.
	(gtk_tree_store_iter_children): ditto
	(gtk_tree_store_iter_nth_child): ditto
	(gtk_tree_store_iter_parent): ditto
	(gtk_tree_store_insert): remove handling of parent->user_data ==
	NULL, replace with parent == NULL

	* gtk/gtktreemodel.c (inserted_callback): put some fixes in here,
	and a comment explaining things

	* gtk/gtktreestore.c: add GtkTreeDragSource/GtkTreeDragDest
	interface support to GtkTreeStore.

	* gtk/gtktreemodel.c (gtk_tree_path_prev): didn't properly return
	FALSE if no prev, fix

	* gtk/gtktreeview.c (set_source_row): use a row reference
	(set_dest_row): use a row reference
2001-01-31 00:57:49 +00:00

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/* gtkliststore.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 <string.h>
#include "gtktreemodel.h"
#include "gtkliststore.h"
#include "gtktreedatalist.h"
#include "gtksignal.h"
#include "gtktreednd.h"
#include <gobject/gvaluecollector.h>
#define G_SLIST(x) ((GSList *) x)
enum {
CHANGED,
INSERTED,
CHILD_TOGGLED,
DELETED,
LAST_SIGNAL
};
static guint list_store_signals[LAST_SIGNAL] = { 0 };
static void gtk_list_store_init (GtkListStore *list_store);
static void gtk_list_store_class_init (GtkListStoreClass *class);
static void gtk_list_store_tree_model_init (GtkTreeModelIface *iface);
static void gtk_list_store_drag_source_init(GtkTreeDragSourceIface *iface);
static void gtk_list_store_drag_dest_init (GtkTreeDragDestIface *iface);
static guint gtk_list_store_get_flags (GtkTreeModel *tree_model);
static gint gtk_list_store_get_n_columns (GtkTreeModel *tree_model);
static GType gtk_list_store_get_column_type (GtkTreeModel *tree_model,
gint index);
static gboolean gtk_list_store_get_iter (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreePath *path);
static GtkTreePath *gtk_list_store_get_path (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static void gtk_list_store_get_value (GtkTreeModel *tree_model,
GtkTreeIter *iter,
gint column,
GValue *value);
static gboolean gtk_list_store_iter_next (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gboolean gtk_list_store_iter_children (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent);
static gboolean gtk_list_store_iter_has_child (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gint gtk_list_store_iter_n_children (GtkTreeModel *tree_model,
GtkTreeIter *iter);
static gboolean gtk_list_store_iter_nth_child (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent,
gint n);
static gboolean gtk_list_store_iter_parent (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *child);
static gboolean gtk_list_store_drag_data_delete (GtkTreeDragSource *drag_source,
GtkTreePath *path);
static gboolean gtk_list_store_drag_data_get (GtkTreeDragSource *drag_source,
GtkTreePath *path,
GtkSelectionData *selection_data);
static gboolean gtk_list_store_drag_data_received (GtkTreeDragDest *drag_dest,
GtkTreePath *dest,
GtkSelectionData *selection_data);
static gboolean gtk_list_store_row_drop_possible (GtkTreeDragDest *drag_dest,
GtkTreeModel *src_model,
GtkTreePath *src_path,
GtkTreePath *dest_path);
static void
validate_list_store (GtkListStore *list_store)
{
if (gtk_debug_flags & GTK_DEBUG_TREE)
{
g_assert (g_slist_length (list_store->root) == list_store->length);
g_assert (g_slist_last (list_store->root) == list_store->tail);
}
}
GtkType
gtk_list_store_get_type (void)
{
static GtkType list_store_type = 0;
if (!list_store_type)
{
static const GTypeInfo list_store_info =
{
sizeof (GtkListStoreClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_list_store_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkListStore),
0,
(GInstanceInitFunc) gtk_list_store_init,
};
static const GInterfaceInfo tree_model_info =
{
(GInterfaceInitFunc) gtk_list_store_tree_model_init,
NULL,
NULL
};
static const GInterfaceInfo drag_source_info =
{
(GInterfaceInitFunc) gtk_list_store_drag_source_init,
NULL,
NULL
};
static const GInterfaceInfo drag_dest_info =
{
(GInterfaceInitFunc) gtk_list_store_drag_dest_init,
NULL,
NULL
};
list_store_type = g_type_register_static (GTK_TYPE_OBJECT, "GtkListStore", &list_store_info, 0);
g_type_add_interface_static (list_store_type,
GTK_TYPE_TREE_MODEL,
&tree_model_info);
g_type_add_interface_static (list_store_type,
GTK_TYPE_TREE_DRAG_SOURCE,
&drag_source_info);
g_type_add_interface_static (list_store_type,
GTK_TYPE_TREE_DRAG_DEST,
&drag_dest_info);
}
return list_store_type;
}
static void
gtk_list_store_class_init (GtkListStoreClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*) class;
list_store_signals[CHANGED] =
gtk_signal_new ("changed",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkListStoreClass, changed),
gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2,
GTK_TYPE_TREE_PATH,
GTK_TYPE_TREE_ITER);
list_store_signals[INSERTED] =
gtk_signal_new ("inserted",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkListStoreClass, inserted),
gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2,
GTK_TYPE_TREE_PATH,
GTK_TYPE_TREE_ITER);
list_store_signals[CHILD_TOGGLED] =
gtk_signal_new ("child_toggled",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkListStoreClass, child_toggled),
gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2,
GTK_TYPE_TREE_PATH,
GTK_TYPE_TREE_ITER);
list_store_signals[DELETED] =
gtk_signal_new ("deleted",
GTK_RUN_FIRST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkListStoreClass, deleted),
gtk_marshal_VOID__BOXED,
G_TYPE_NONE, 1,
GTK_TYPE_TREE_PATH);
}
static void
gtk_list_store_tree_model_init (GtkTreeModelIface *iface)
{
iface->get_flags = gtk_list_store_get_flags;
iface->get_n_columns = gtk_list_store_get_n_columns;
iface->get_column_type = gtk_list_store_get_column_type;
iface->get_iter = gtk_list_store_get_iter;
iface->get_path = gtk_list_store_get_path;
iface->get_value = gtk_list_store_get_value;
iface->iter_next = gtk_list_store_iter_next;
iface->iter_children = gtk_list_store_iter_children;
iface->iter_has_child = gtk_list_store_iter_has_child;
iface->iter_n_children = gtk_list_store_iter_n_children;
iface->iter_nth_child = gtk_list_store_iter_nth_child;
iface->iter_parent = gtk_list_store_iter_parent;
}
static void
gtk_list_store_drag_source_init (GtkTreeDragSourceIface *iface)
{
iface->drag_data_delete = gtk_list_store_drag_data_delete;
iface->drag_data_get = gtk_list_store_drag_data_get;
}
static void
gtk_list_store_drag_dest_init (GtkTreeDragDestIface *iface)
{
iface->drag_data_received = gtk_list_store_drag_data_received;
iface->row_drop_possible = gtk_list_store_row_drop_possible;
}
static void
gtk_list_store_init (GtkListStore *list_store)
{
list_store->root = NULL;
list_store->tail = NULL;
list_store->stamp = g_random_int ();
list_store->length = 0;
}
GtkListStore *
gtk_list_store_new (void)
{
return GTK_LIST_STORE (gtk_type_new (gtk_list_store_get_type ()));
}
GtkListStore *
gtk_list_store_new_with_types (gint n_columns,
...)
{
GtkListStore *retval;
va_list args;
gint i;
g_return_val_if_fail (n_columns > 0, NULL);
retval = gtk_list_store_new ();
gtk_list_store_set_n_columns (retval, n_columns);
va_start (args, n_columns);
for (i = 0; i < n_columns; i++)
gtk_list_store_set_column_type (retval, i, va_arg (args, GType));
va_end (args);
return retval;
}
void
gtk_list_store_set_n_columns (GtkListStore *list_store,
gint n_columns)
{
GType *new_columns;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (n_columns > 0);
if (list_store->n_columns == n_columns)
return;
new_columns = g_new0 (GType, n_columns);
if (list_store->column_headers)
{
/* copy the old header orders over */
if (n_columns >= list_store->n_columns)
memcpy (new_columns, list_store->column_headers, list_store->n_columns * sizeof (gchar *));
else
memcpy (new_columns, list_store->column_headers, n_columns * sizeof (GType));
g_free (list_store->column_headers);
}
list_store->column_headers = new_columns;
list_store->n_columns = n_columns;
}
void
gtk_list_store_set_column_type (GtkListStore *list_store,
gint column,
GType type)
{
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (column >=0 && column < list_store->n_columns);
list_store->column_headers[column] = type;
}
/* Fulfill the GtkTreeModel requirements */
static guint
gtk_list_store_get_flags (GtkTreeModel *tree_model)
{
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), 0);
return GTK_TREE_MODEL_ITERS_PERSIST;
}
static gint
gtk_list_store_get_n_columns (GtkTreeModel *tree_model)
{
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), 0);
return GTK_LIST_STORE (tree_model)->n_columns;
}
static GType
gtk_list_store_get_column_type (GtkTreeModel *tree_model,
gint index)
{
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), G_TYPE_INVALID);
g_return_val_if_fail (index < GTK_LIST_STORE (tree_model)->n_columns &&
index >= 0, G_TYPE_INVALID);
return GTK_LIST_STORE (tree_model)->column_headers[index];
}
static gboolean
gtk_list_store_get_iter (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreePath *path)
{
GSList *list;
gint i;
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), FALSE);
g_return_val_if_fail (gtk_tree_path_get_depth (path) > 0, FALSE);
i = gtk_tree_path_get_indices (path)[0];
if (i >= GTK_LIST_STORE (tree_model)->length)
return FALSE;
list = g_slist_nth (G_SLIST (GTK_LIST_STORE (tree_model)->root),
i);
/* If this fails, list_store->length has gotten mangled. */
g_assert (list);
iter->stamp = GTK_LIST_STORE (tree_model)->stamp;
iter->user_data = list;
return TRUE;
}
static GtkTreePath *
gtk_list_store_get_path (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
GtkTreePath *retval;
GSList *list;
gint i = 0;
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), NULL);
g_return_val_if_fail (iter->stamp == GTK_LIST_STORE (tree_model)->stamp, NULL);
for (list = G_SLIST (GTK_LIST_STORE (tree_model)->root); list; list = list->next)
{
if (list == G_SLIST (iter->user_data))
break;
i++;
}
if (list == NULL)
return NULL;
retval = gtk_tree_path_new ();
gtk_tree_path_append_index (retval, i);
return retval;
}
static void
gtk_list_store_get_value (GtkTreeModel *tree_model,
GtkTreeIter *iter,
gint column,
GValue *value)
{
GtkTreeDataList *list;
gint tmp_column = column;
g_return_if_fail (GTK_IS_LIST_STORE (tree_model));
g_return_if_fail (column < GTK_LIST_STORE (tree_model)->n_columns);
g_return_if_fail (GTK_LIST_STORE (tree_model)->stamp == iter->stamp);
list = G_SLIST (iter->user_data)->data;
while (tmp_column-- > 0 && list)
list = list->next;
if (list == NULL)
g_value_init (value, GTK_LIST_STORE (tree_model)->column_headers[column]);
else
_gtk_tree_data_list_node_to_value (list,
GTK_LIST_STORE (tree_model)->column_headers[column],
value);
}
static gboolean
gtk_list_store_iter_next (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), FALSE);
g_return_val_if_fail (GTK_LIST_STORE (tree_model)->stamp == iter->stamp, FALSE);
if (G_SLIST (iter->user_data)->next)
{
iter->user_data = G_SLIST (iter->user_data)->next;
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_list_store_iter_children (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent)
{
/* this is a list, nodes have no children */
if (parent)
return FALSE;
/* but if parent == NULL we return the list itself as children of the
* "root"
*/
if (GTK_LIST_STORE (tree_model)->root)
{
iter->stamp = GTK_LIST_STORE (tree_model)->stamp;
iter->user_data = GTK_LIST_STORE (tree_model)->root;
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_list_store_iter_has_child (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
return FALSE;
}
static gint
gtk_list_store_iter_n_children (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
if (iter == NULL)
return GTK_LIST_STORE (tree_model)->length;
else
return 0;
}
static gboolean
gtk_list_store_iter_nth_child (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *parent,
gint n)
{
GSList *child;
g_return_val_if_fail (GTK_IS_LIST_STORE (tree_model), FALSE);
if (parent)
return FALSE;
child = g_slist_nth (G_SLIST (GTK_LIST_STORE (tree_model)->root), n);
if (child)
{
iter->user_data = child;
iter->stamp = GTK_LIST_STORE (tree_model)->stamp;
return TRUE;
}
else
return FALSE;
}
static gboolean
gtk_list_store_iter_parent (GtkTreeModel *tree_model,
GtkTreeIter *iter,
GtkTreeIter *child)
{
return FALSE;
}
/* Public accessors */
/* This is a somewhat inelegant function that does a lot of list
* manipulations on it's own.
*/
void
gtk_list_store_set_cell (GtkListStore *list_store,
GtkTreeIter *iter,
gint column,
GValue *value)
{
GtkTreeDataList *list;
GtkTreeDataList *prev;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter != NULL);
g_return_if_fail (column >= 0 && column < list_store->n_columns);
prev = list = G_SLIST (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 (list_store),
"changed",
NULL, iter);
return;
}
column--;
prev = list;
list = list->next;
}
if (G_SLIST (iter->user_data)->data == NULL)
{
G_SLIST (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 (list_store),
"changed",
NULL, iter);
}
void
gtk_list_store_set_valist (GtkListStore *list_store,
GtkTreeIter *iter,
va_list var_args)
{
gint column;
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
column = va_arg (var_args, gint);
while (column != -1)
{
GValue value = { 0, };
gchar *error = NULL;
if (column >= list_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, list_store->column_headers[column]);
G_VALUE_COLLECT (&value, var_args, &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_list_store_set_cell (list_store,
iter,
column,
&value);
g_value_unset (&value);
column = va_arg (var_args, gint);
}
}
/**
* gtk_list_store_set:
* @list_store: a #GtkListStore
* @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_list_store_set (store, iter,
* 0, "Foo", -1).
**/
void
gtk_list_store_set (GtkListStore *list_store,
GtkTreeIter *iter,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
va_start (var_args, iter);
gtk_list_store_set_valist (list_store, iter, var_args);
va_end (var_args);
}
void
gtk_list_store_get_valist (GtkListStore *list_store,
GtkTreeIter *iter,
va_list var_args)
{
gint column;
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
column = va_arg (var_args, gint);
while (column != -1)
{
GValue value = { 0, };
gchar *error = NULL;
if (column >= list_store->n_columns)
{
g_warning ("%s: Invalid column number %d accessed (remember to end your list of columns with a -1)", G_STRLOC, column);
break;
}
gtk_list_store_get_value (GTK_TREE_MODEL (list_store), iter, column, &value);
G_VALUE_LCOPY (&value, var_args, &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;
}
g_value_unset (&value);
column = va_arg (var_args, gint);
}
}
void
gtk_list_store_get (GtkListStore *list_store,
GtkTreeIter *iter,
...)
{
va_list var_args;
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
va_start (var_args, iter);
gtk_list_store_get_valist (list_store, iter, var_args);
va_end (var_args);
}
static GSList*
remove_link_saving_prev (GSList *list,
GSList *link,
GSList **prevp)
{
GSList *tmp;
GSList *prev;
prev = NULL;
tmp = list;
while (tmp)
{
if (tmp == link)
{
if (prev)
prev->next = link->next;
if (list == link)
list = list->next;
link->next = NULL;
break;
}
prev = tmp;
tmp = tmp->next;
}
*prevp = prev;
return list;
}
static void
gtk_list_store_remove_silently (GtkListStore *list_store,
GtkTreeIter *iter,
GtkTreePath *path)
{
if (G_SLIST (iter->user_data)->data)
{
_gtk_tree_data_list_free ((GtkTreeDataList *) G_SLIST (iter->user_data)->data,
list_store->column_headers);
G_SLIST (iter->user_data)->data = NULL;
}
{
GSList *prev = NULL;
list_store->root = remove_link_saving_prev (G_SLIST (list_store->root),
G_SLIST (iter->user_data),
&prev);
list_store->length -= 1;
if (iter->user_data == list_store->tail)
list_store->tail = prev;
}
list_store->stamp ++;
}
void
gtk_list_store_remove (GtkListStore *list_store,
GtkTreeIter *iter)
{
GtkTreePath *path;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter->user_data != NULL);
path = gtk_list_store_get_path (GTK_TREE_MODEL (list_store), iter);
validate_list_store (list_store);
gtk_list_store_remove_silently (list_store, iter, path);
validate_list_store (list_store);
gtk_signal_emit_by_name (GTK_OBJECT (list_store),
"deleted",
path);
gtk_tree_path_free (path);
}
static void
insert_after (GtkListStore *list_store,
GSList *sibling,
GSList *new_list)
{
g_return_if_fail (sibling != NULL);
g_return_if_fail (new_list != NULL);
/* insert new node after list */
new_list->next = sibling->next;
sibling->next = new_list;
/* if list was the tail, the new node is the new tail */
if (sibling == list_store->tail)
list_store->tail = new_list;
list_store->length += 1;
}
void
gtk_list_store_insert (GtkListStore *list_store,
GtkTreeIter *iter,
gint position)
{
GSList *list;
GtkTreePath *path;
GSList *new_list;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter != NULL);
g_return_if_fail (position >= 0);
if (position == 0)
{
gtk_list_store_prepend (list_store, iter);
return;
}
new_list = g_slist_alloc ();
list = g_slist_nth (G_SLIST (list_store->root), position - 1);
if (list == NULL)
{
g_warning ("%s: position %d is off the end of the list\n", G_STRLOC, position);
return;
}
insert_after (list_store, list, new_list);
iter->stamp = list_store->stamp;
iter->user_data = new_list;
validate_list_store (list_store);
path = gtk_tree_path_new ();
gtk_tree_path_append_index (path, position);
gtk_signal_emit_by_name (GTK_OBJECT (list_store),
"inserted",
path, iter);
gtk_tree_path_free (path);
}
void
gtk_list_store_insert_before (GtkListStore *list_store,
GtkTreeIter *iter,
GtkTreeIter *sibling)
{
GtkTreePath *path;
GSList *list, *prev, *new_list;
gint i = 0;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter != NULL);
if (sibling == NULL)
{
gtk_list_store_append (list_store, iter);
return;
}
new_list = g_slist_alloc ();
prev = NULL;
list = list_store->root;
while (list && list != sibling->user_data)
{
prev = list;
list = list->next;
i++;
}
if (list != sibling->user_data)
{
g_warning ("%s: sibling iterator invalid? not found in the list", G_STRLOC);
return;
}
/* if there are no nodes, we become the list tail, otherwise we
* are inserting before any existing nodes so we can't change
* the tail
*/
if (list_store->root == NULL)
list_store->tail = new_list;
if (prev)
{
new_list->next = prev->next;
prev->next = new_list;
}
else
{
new_list->next = list_store->root;
list_store->root = new_list;
}
iter->stamp = list_store->stamp;
iter->user_data = new_list;
list_store->length += 1;
validate_list_store (list_store);
path = gtk_tree_path_new ();
gtk_tree_path_append_index (path, i);
gtk_signal_emit_by_name (GTK_OBJECT (list_store),
"inserted",
path, iter);
gtk_tree_path_free (path);
}
void
gtk_list_store_insert_after (GtkListStore *list_store,
GtkTreeIter *iter,
GtkTreeIter *sibling)
{
GtkTreePath *path;
GSList *list, *new_list;
gint i = 0;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter != NULL);
if (sibling)
g_return_if_fail (sibling->stamp == list_store->stamp);
if (sibling == NULL)
{
gtk_list_store_prepend (list_store, iter);
return;
}
for (list = list_store->root; list && list != sibling->user_data; list = list->next)
i++;
g_return_if_fail (list == sibling->user_data);
new_list = g_slist_alloc ();
insert_after (list_store, list, new_list);
iter->stamp = list_store->stamp;
iter->user_data = new_list;
validate_list_store (list_store);
path = gtk_tree_path_new ();
gtk_tree_path_append_index (path, i);
gtk_signal_emit_by_name (GTK_OBJECT (list_store),
"inserted",
path, iter);
gtk_tree_path_free (path);
}
void
gtk_list_store_prepend (GtkListStore *list_store,
GtkTreeIter *iter)
{
GtkTreePath *path;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter != NULL);
iter->stamp = list_store->stamp;
iter->user_data = g_slist_alloc ();
if (list_store->root == NULL)
list_store->tail = iter->user_data;
G_SLIST (iter->user_data)->next = G_SLIST (list_store->root);
list_store->root = iter->user_data;
list_store->length += 1;
validate_list_store (list_store);
path = gtk_tree_path_new ();
gtk_tree_path_append_index (path, 0);
gtk_signal_emit_by_name (GTK_OBJECT (list_store),
"inserted",
path, iter);
gtk_tree_path_free (path);
}
void
gtk_list_store_append (GtkListStore *list_store,
GtkTreeIter *iter)
{
GtkTreePath *path;
gint i = 0;
g_return_if_fail (list_store != NULL);
g_return_if_fail (GTK_IS_LIST_STORE (list_store));
g_return_if_fail (iter != NULL);
iter->stamp = list_store->stamp;
iter->user_data = g_slist_alloc ();
if (list_store->tail)
list_store->tail->next = iter->user_data;
else
list_store->root = iter->user_data;
list_store->tail = iter->user_data;
list_store->length += 1;
validate_list_store (list_store);
path = gtk_tree_path_new ();
gtk_tree_path_append_index (path, i);
gtk_signal_emit_by_name (GTK_OBJECT (list_store),
"inserted",
path, iter);
gtk_tree_path_free (path);
}
static gboolean
gtk_list_store_drag_data_delete (GtkTreeDragSource *drag_source,
GtkTreePath *path)
{
GtkTreeIter iter;
g_return_val_if_fail (GTK_IS_LIST_STORE (drag_source), FALSE);
if (gtk_tree_model_get_iter (GTK_TREE_MODEL (drag_source),
&iter,
path))
{
gtk_list_store_remove (GTK_LIST_STORE (drag_source),
&iter);
return TRUE;
}
else
{
return FALSE;
}
}
static gboolean
gtk_list_store_drag_data_get (GtkTreeDragSource *drag_source,
GtkTreePath *path,
GtkSelectionData *selection_data)
{
g_return_val_if_fail (GTK_IS_LIST_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 gboolean
gtk_list_store_drag_data_received (GtkTreeDragDest *drag_dest,
GtkTreePath *dest,
GtkSelectionData *selection_data)
{
GtkTreeModel *tree_model;
GtkListStore *list_store;
GtkTreeModel *src_model = NULL;
GtkTreePath *src_path = NULL;
gboolean retval = FALSE;
g_return_val_if_fail (GTK_IS_LIST_STORE (drag_dest), FALSE);
tree_model = GTK_TREE_MODEL (drag_dest);
list_store = GTK_LIST_STORE (drag_dest);
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))
{
g_print ("can't get source path as iter\n");
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))
{
/* dest was the first spot in the list; which means we are supposed
* to prepend.
*/
gtk_list_store_prepend (GTK_LIST_STORE (tree_model),
&dest_iter);
retval = TRUE;
g_print ("prepending to list\n");
}
else
{
if (gtk_tree_model_get_iter (GTK_TREE_MODEL (tree_model),
&dest_iter,
prev))
{
GtkTreeIter tmp_iter = dest_iter;
gtk_list_store_insert_after (GTK_LIST_STORE (tree_model),
&dest_iter,
&tmp_iter);
retval = TRUE;
g_print ("inserting into list\n");
}
else
g_print ("can't get iter to insert after\n");
}
gtk_tree_path_free (prev);
/* If we succeeded in creating dest_iter, copy data from src
*/
if (retval)
{
GtkTreeDataList *dl = G_SLIST (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,
list_store->column_headers[col]);
g_print ("copied col %d type %s\n", col,
g_type_name (list_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_SLIST (dest_iter.user_data)->data = copy_head;
gtk_signal_emit_by_name (GTK_OBJECT (tree_model),
"changed",
NULL, &dest_iter);
}
}
else
{
/* FIXME maybe add some data targets eventually, or handle text
* targets in the simple case.
*/
g_print ("not accepting target\n");
}
out:
if (src_path)
gtk_tree_path_free (src_path);
return retval;
}
static gboolean
gtk_list_store_row_drop_possible (GtkTreeDragDest *drag_dest,
GtkTreeModel *src_model,
GtkTreePath *src_path,
GtkTreePath *dest_path)
{
gint *indices;
g_return_val_if_fail (GTK_IS_LIST_STORE (drag_dest), FALSE);
if (src_model != GTK_TREE_MODEL (drag_dest))
return FALSE;
if (gtk_tree_path_get_depth (dest_path) != 1)
return FALSE;
/* can drop before any existing node, or before one past any existing. */
indices = gtk_tree_path_get_indices (dest_path);
if (indices[0] <= GTK_LIST_STORE (drag_dest)->length)
return TRUE;
else
return FALSE;
}
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