GdaTreeNode

GdaTreeNode — a node in a GdaTree

Synopsis

                    GdaTreeNode;
GdaTreeNode*        gda_tree_node_new                   (const gchar *name);
GdaTreeNode *       gda_tree_node_get_parent            (GdaTreeNode *node);
GSList *            gda_tree_node_get_children          (GdaTreeNode *node);
GdaTreeNode *       gda_tree_node_get_child_index       (GdaTreeNode *node,
                                                         gint index);
GdaTreeNode *       gda_tree_node_get_child_name        (GdaTreeNode *node,
                                                         const gchar *name);
void                gda_tree_node_set_node_attribute    (GdaTreeNode *node,
                                                         const gchar *attribute,
                                                         const GValue *value,
                                                         GDestroyNotify destroy);
const GValue *      gda_tree_node_get_node_attribute    (GdaTreeNode *node,
                                                         const gchar *attribute);
const GValue *      gda_tree_node_fetch_attribute       (GdaTreeNode *node,
                                                         const gchar *attribute);

Object Hierarchy

  GObject
   +----GdaTreeNode

Properties

  "name"                     gchar*                : Read / Write

Signals

  "node-changed"                                   : Run Last
  "node-deleted"                                   : Run Last
  "node-has-child-toggled"                         : Run Last
  "node-inserted"                                  : Run Last

Description

Every node in a GdaTree tree is represented by a single GdaTreeNode object. There is no distinction between nodes which have children and those which don't (leaf nodes).

The GdaTreeNode is very basic as it only has a "name" attribute: users are encouraged to subclass it to add more features if needed (and make use of them by defining a GdaTreeManagerNodeFunc function and calling gda_tree_manager_set_node_create_func()).

Details

GdaTreeNode

typedef struct _GdaTreeNode GdaTreeNode;


gda_tree_node_new ()

GdaTreeNode*        gda_tree_node_new                   (const gchar *name);

Creates a new GdaTreeNode object

name :

a name, or NULL

Returns :

a new GdaTreeNode. [transfer full]

Since 4.2


gda_tree_node_get_parent ()

GdaTreeNode *       gda_tree_node_get_parent            (GdaTreeNode *node);

Get the GdaTreeNode parent of node in the GdaTree node belongs to. If node is at the top level, then this method return NULL.

node :

a GdaTreeNode object

Returns :

the parent GdaTreeNode. [transfer none]

Since 4.2


gda_tree_node_get_children ()

GSList *            gda_tree_node_get_children          (GdaTreeNode *node);

Get a list of all node's children, free it with g_slist_free() after usage

node :

a GdaTreeNode object

Returns :

a new GSList of GdaTreeNode objects, or NULL if node does not have any child. [transfer container][element-type GdaTreeNode]

Since 4.2


gda_tree_node_get_child_index ()

GdaTreeNode *       gda_tree_node_get_child_index       (GdaTreeNode *node,
                                                         gint index);

Get the GdaTreeNode child of node at position index (starting at 0).

node :

a GdaTreeNode object

index :

a index

Returns :

the GdaTreeNode, or NULL if not found. [transfer none]

Since 4.2


gda_tree_node_get_child_name ()

GdaTreeNode *       gda_tree_node_get_child_name        (GdaTreeNode *node,
                                                         const gchar *name);

Get the GdaTreeNode child of node which has the GDA_ATTRIBUTE_NAME set to name

node :

a GdaTreeNode object

name :

requested node's name

Returns :

the GdaTreeNode, or NULL if not found. [transfer none]

Since 4.2


gda_tree_node_set_node_attribute ()

void                gda_tree_node_set_node_attribute    (GdaTreeNode *node,
                                                         const gchar *attribute,
                                                         const GValue *value,
                                                         GDestroyNotify destroy);

Set the value associated to a named attribute. The attribute string is used AS IT IS by this method (eg. no copy of it is made), and the memory it uses will be freed using the destroy function when no longer needed (if destroy is NULL, then the string will not be freed at all).

Attributes can have any name, but Libgda proposes some default names, see this section.

For example one would use it as:

gda_tree_node_set_node_attribute (node, g_strdup (my_attribute), g_free, my_value); gda_tree_node_set_node_attribute (node, GDA_ATTRIBUTE_NAME, NULL, my_value);

If there is already an attribute named attribute set, then its value is replaced with the new value (value is copied), except if value is NULL, in which case the attribute is removed.

node :

a GdaTreeNode

attribute :

attribute name

value :

a GValue, or NULL

destroy :

a function to be called when attribute is not needed anymore, or NULL

Since 4.2


gda_tree_node_get_node_attribute ()

const GValue *      gda_tree_node_get_node_attribute    (GdaTreeNode *node,
                                                         const gchar *attribute);

Get the value associated to the attribute named attribute for node. The difference with gda_tree_node_fetch_attribute() is that gda_tree_node_fetch_attribute() will also query node's parents (recursively up to the top level node) if the attribute is not set for node.

Attributes can have any name, but Libgda proposes some default names, see this section.

node :

a GdaTreeNode

attribute :

attribute name as a string

Returns :

a read-only GValue, or NULL if not attribute named attribute has been set for node. [transfer none]

Since 4.2


gda_tree_node_fetch_attribute ()

const GValue *      gda_tree_node_fetch_attribute       (GdaTreeNode *node,
                                                         const gchar *attribute);

Get the value associated to the attribute named attribute for node. If the attribute is not set, then node's parents is queries (recursively up to the top level node).

Attributes can have any name, but Libgda proposes some default names, see this section.

node :

a GdaTreeNode

attribute :

attribute name as a string

Returns :

a read-only GValue, or NULL if not attribute named attribute has been set for node. [transfer none]

Since 4.2

Property Details

The "name" property

  "name"                     gchar*                : Read / Write

Node's name attribute.

Default value: NULL

Signal Details

The "node-changed" signal

void                user_function                      (GdaTreeNode *reporting,
                                                        GdaTreeNode *node,
                                                        gpointer     user_data)      : Run Last

Gets emitted when a node has changed

reporting :

the GdaTreeNode which emits the signal (may be a parent of node, or node itself)

node :

the GdaTreeNode which has changed

user_data :

user data set when the signal handler was connected.

Since 4.2


The "node-deleted" signal

void                user_function                      (GdaTreeNode *reporting,
                                                        gchar       *relative_path,
                                                        gpointer     user_data)          : Run Last

Gets emitted when a node has been removed

reporting :

the GdaTreeNode which emits the signal (a parent of the removed node)

relative_path :

the path the node held, relative to reporting

user_data :

user data set when the signal handler was connected.

Since 4.2


The "node-has-child-toggled" signal

void                user_function                      (GdaTreeNode *reporting,
                                                        GdaTreeNode *node,
                                                        gpointer     user_data)      : Run Last

Gets emitted when a node has has a child when it did not have any or when it does not have a ny children anymore when it had some

reporting :

the GdaTreeNode which emits the signal (may be a parent of node, or node itself)

node :

the GdaTreeNode which changed from having children to being a leaf or the other way around

user_data :

user data set when the signal handler was connected.

Since 4.2


The "node-inserted" signal

void                user_function                      (GdaTreeNode *reporting,
                                                        GdaTreeNode *node,
                                                        gpointer     user_data)      : Run Last

Gets emitted when a node has been inserted

reporting :

the GdaTreeNode which emits the signal (may be a parent of node, or node itself)

node :

the GdaTreeNode which has been inserted

user_data :

user data set when the signal handler was connected.

Since 4.2