GdaTree

GdaTree — A tree-structure

Stability Level

Stable, unless otherwise indicated

Functions

GdaTree * gda_tree_new ()
void gda_tree_add_manager ()
void gda_tree_clean ()
gboolean gda_tree_update_all ()
gboolean gda_tree_update_part ()
gboolean gda_tree_update_children ()
GSList * gda_tree_get_nodes_in_path ()
GdaTreeNode * gda_tree_get_node ()
gchar * gda_tree_get_node_path ()
GdaTreeManager * gda_tree_get_node_manager ()
void gda_tree_set_attribute ()
void gda_tree_dump ()

Properties

gboolean is-list Read

Signals

void node-changed Run Last
void node-deleted Run Last
void node-has-child-toggled Run Last
void node-inserted Run Last

Types and Values

  GdaTree

Object Hierarchy

    GObject
    ╰── GdaTree

Includes

#include <libgda/gda-statement-extra.h>

Description

The GdaTree is the top level object representing hierarchically structured data. From this object it is also possible (depending on the tree managers it uses), to clean (remove all the nodes) the whole tree, or to request a complete or partial update of the nodes.

It is also possible to set attributes to the tree itself (as it is possible to do for tree nodes), or to dump the whole or part of a tree in an indented and easy to read fashion.

Functions

gda_tree_new ()

GdaTree *
gda_tree_new (void);

Creates a new GdaTree object

Returns

a new GdaTree object.

[transfer full]

Since: 4.2

gda_tree_add_manager ()

void
gda_tree_add_manager (GdaTree *tree,
                      GdaTreeManager *manager);

Sets manager as a top GdaTreeManager object, which will be responsible for creating top level nodes in tree .

Parameters

tree

a GdaTree object

  

manager

a GdaTreeManager object.

[transfer none]

Since: 4.2

gda_tree_clean ()

void
gda_tree_clean (GdaTree *tree);

Removes any node in tree

Parameters

tree

a GdaTree object

  

Since: 4.2

gda_tree_update_all ()

gboolean
gda_tree_update_all (GdaTree *tree,
                     GError **error);

Requests that tree be populated with nodes. If an error occurs, then tree 's contents is left unchanged, and otherwise tree 's previous contents is completely replaced by the new one.

Parameters

tree

a GdaTree object

  

error

a place to store errors, or NULL.

[allow-none]

Returns

TRUE if no error occurred.

Since: 4.2

gda_tree_update_part ()

gboolean
gda_tree_update_part (GdaTree *tree,
                      GdaTreeNode *node,
                      GError **error);

Requests that tree be populated with nodes, starting from node

Parameters

tree

a GdaTree object

  

node

a GdaTreeNode node in tree

 

error

a place to store errors, or NULL.

[allow-none]

Returns

TRUE if no error occurred.

Since: 4.2

gda_tree_update_children ()

gboolean
gda_tree_update_children (GdaTree *tree,
                          GdaTreeNode *node,
                          GError **error);

Update the children of node in tree (not recursively, to update recursively, use gda_tree_update_part()). If node is NULL then the top level nodes are updated.

Parameters

tree

a GdaTree object

  

node

a GdaTreeNode node in tree , or NULL.

[allow-none]

error

a place to store errors, or NULL.

[allow-none]

Returns

TRUE if no error occurred.

Since: 4.2.8

gda_tree_get_nodes_in_path ()

GSList *
gda_tree_get_nodes_in_path (GdaTree *tree,
                            const gchar *tree_path,
                            gboolean use_names);

The returned list is a list of all the GdaTreeNode nodes below the node at the specified path.

As a corner case if tree_path is NULL, then the returned list contains all the top level nodes.

Parameters

tree

a GdaTree object

  

tree_path

full path to the required nodes (if use_names is TRUE, then it must start with '/'), or NULL.

[allow-none]

use_names

if TRUE, then tree_path will be interpreted as a unix style path, and if FALSE, then tree_path will be interpreted similarly to the GtkTreePath's string representation.

  

Returns

a new list of GdaTreeNode pointers, free it with g_slist_free().

[transfer container][element-type GdaTreeNode]

Since: 4.2

gda_tree_get_node ()

GdaTreeNode *
gda_tree_get_node (GdaTree *tree,
                   const gchar *tree_path,
                   gboolean use_names);

Locates a GdaTreeNode using the tree_path path.

Parameters

tree

a GdaTree object

  

tree_path

full path to the required nodes (if use_names is TRUE, then it must start with '/')

  

use_names

if TRUE, then tree_path will be interpreted as a unix style path, and if FALSE, then tree_path will be interpreted similarly to the GtkTreePath's string representation.

  

Returns

the requested GdaTreeNode pointer, or NULL if not found.

[transfer none][allow-none]

Since: 4.2

gda_tree_get_node_path ()

gchar *
gda_tree_get_node_path (GdaTree *tree,
                        GdaTreeNode *node);

Get the path associated to node in tree .

Parameters

tree

a GdaTree

  

node

a GdaTreeNode node in tree

 

Returns

a new string, or NULL if node is not in tree .

[transfer full]

Since: 4.2

gda_tree_get_node_manager ()

GdaTreeManager *
gda_tree_get_node_manager (GdaTree *tree,
                           GdaTreeNode *node);

Get the GdaTreeManager which created node in tree

Parameters

tree

a GdaTree

  

node

a GdaTreeNode present in tree

 

Returns

the GdaTreeManager, or NULL if node is not present in tree .

[transfer none]

Since: 4.2

gda_tree_set_attribute ()

void
gda_tree_set_attribute (GdaTree *tree,
                        const gchar *attribute,
                        const GValue *value,
                        GDestroyNotify destroy);

Sets an attribute to tree , which will be accessible to any node in it.

Parameters

tree

a GdaTree object

  

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_dump ()

void
gda_tree_dump (GdaTree *tree,
               GdaTreeNode *node,
               FILE *stream);

Dumps the contents of tree to stream , using a hierarchical view.

Parameters

tree

a GdaTree

  

node

a GdaTreeNode to start the dump from, or NULL for a full dump.

[allow-none]

stream

a stream to send the dump to, or NULL for STDOUT.

[allow-none]

Since: 4.2

Types and Values

GdaTree

typedef struct _GdaTree GdaTree;

Property Details

The “is-list” property

  “is-list”                  gboolean

Tells if the GdaTree is a list or a tree.

Owner: GdaTree

Flags: Read

Default value: FALSE

Signal Details

The “node-changed” signal

void
user_function (GdaTree     *tree,
               GdaTreeNode *node,
               gpointer     user_data)

Gets emitted when a node has changed in tree

Parameters

tree

the GdaTree

  

node

the GdaTreeNode which has changed

  

user_data

user data set when the signal handler was connected.

  

Flags: Run Last

Since: 4.2

The “node-deleted” signal

void
user_function (GdaTree *tree,
               char    *node_path,
               gpointer user_data)

Gets emitted when a node has been removed from tree

Parameters

tree

the GdaTree

  

node_path

the position the node held in tree as a tree path

  

user_data

user data set when the signal handler was connected.

  

Flags: Run Last

Since: 4.2

The “node-has-child-toggled” signal

void
user_function (GdaTree     *tree,
               GdaTreeNode *node,
               gpointer     user_data)

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

Parameters

tree

the GdaTree

  

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.

  

Flags: Run Last

Since: 4.2

The “node-inserted” signal

void
user_function (GdaTree     *tree,
               GdaTreeNode *node,
               gpointer     user_data)

Gets emitted when a node has been inserted in tree

Parameters

tree

the GdaTree

  

node

the GdaTreeNode which has inserted

  

user_data

user data set when the signal handler was connected.

  

Flags: Run Last

Since: 4.2

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