AtkRelation: ATK - Accessibility Toolkit

## AtkRelation AtkRelation — An object used to describe a relation between a object and one or more other objects. |

## Functions

AtkRelationType | atk_relation_type_register ()
const gchar * | atk_relation_type_get_name ()
AtkRelationType | atk_relation_type_for_name ()
AtkRelation * | atk_relation_new ()
AtkRelationType | atk_relation_get_relation_type ()
GPtrArray * | atk_relation_get_target ()
void | atk_relation_add_target ()
gboolean | atk_relation_remove_target ()
gboolean | atk_relation_set_contains_target ()

## Properties

AtkRelationType | relation-type | Read / Write
GValueArray * | target | Read / Write

## Types and Values

struct | AtkRelation
enum | AtkRelationType

## Object Hierarchy

        GObject
        ╰── AtkRelation

## Description

An AtkRelation describes a relation between an object and one or more other objects. The actual relations that an object has with other objects are defined as an AtkRelationSet, which is a set of AtkRelations.

## Functions

### atk_relation_type_register ()

    AtkRelationType
    atk_relation_type_register (const gchar *name);

Associate `name` with a new AtkRelationType

#### Parameters

name | a name string |

#### Returns

an AtkRelationType associated with `name`

### atk_relation_type_get_name ()

    const gchar *
    atk_relation_type_get_name (AtkRelationType type);

Gets the description string describing the AtkRelationType `type` .

#### Parameters

type | The AtkRelationType whose name is required |

#### Returns

the string describing the AtkRelationType

### atk_relation_type_for_name ()

    AtkRelationType
    atk_relation_type_for_name (const gchar *name);

Get the AtkRelationType type corresponding to a relation name.

#### Parameters

name | a string which is the (non-localized) name of an ATK relation type. |

#### Returns

the AtkRelationType enumerated type corresponding to the specified name, or ATK_RELATION_NULL if no matching relation type is found.

### atk_relation_new ()

    AtkRelation *
    atk_relation_new (AtkObject **targets,
                      gint n_targets,
                      AtkRelationType relationship);

Create a new relation for the specified key and the specified list of targets. See also `atk_object_add_relationship()`.

#### Parameters

targets | an array of pointers to AtkObjects. | [array length=n_targets]
n_targets | number of AtkObjects pointed to by `targets` |
relationship | an AtkRelationType with which to create the new AtkRelation |

#### Returns

a pointer to a new AtkRelation

### atk_relation_get_relation_type ()

    AtkRelationType
    atk_relation_get_relation_type (AtkRelation *relation);

Gets the type of `relation`

#### Parameters

relation | an AtkRelation |

#### Returns

the type of `relation`

### atk_relation_get_target ()

    GPtrArray *
    atk_relation_get_target (AtkRelation *relation);

Gets the target list of `relation`

#### Parameters

relation | an AtkRelation |

#### Returns

the target list of `relation` .

[transfer none][element-type Atk.Object]

### atk_relation_add_target ()

    void
    atk_relation_add_target (AtkRelation *relation,
                             AtkObject *target);

Adds the specified AtkObject to the target for the relation, if it is not already present. See also `atk_object_add_relationship()`.

#### Parameters

relation | an AtkRelation |
target | an AtkObject |

Since: 1.9

### atk_relation_remove_target ()

    gboolean
    atk_relation_remove_target (AtkRelation *relation,
                                AtkObject *target);

Remove the specified AtkObject from the target for the relation.

#### Parameters

relation | an AtkRelation |
target | an AtkObject |

#### Returns

TRUE if the removal is successful.

### atk_relation_set_contains_target ()

    gboolean
    atk_relation_set_contains_target (AtkRelationSet *set,
                                      AtkRelationType relationship,
                                      AtkObject *target);

Determines whether the relation set contains a relation that matches the specified pair formed by type `relationship` and object `target` .

#### Parameters

set | an AtkRelationSet |
relationship | an AtkRelationType |
target | an AtkObject |

#### Returns

`TRUE` if `set` contains a relation with the relationship type `relationship` with an object `target` , `FALSE` otherwise

## Types and Values

### struct AtkRelation

    struct AtkRelation;

### enum AtkRelationType

Describes the type of the relation

#### Members

ATK_RELATION_NULL | Not used, represens "no relationship" or an error condition. |
ATK_RELATION_CONTROLLED_BY | Indicates an object controlled by one or more target objects. |
ATK_RELATION_CONTROLLER_FOR | Indicates an object is an controller for one or more target objects. |
ATK_RELATION_LABEL_FOR | Indicates an object is a label for one or more target objects. |
ATK_RELATION_LABELLED_BY | Indicates an object is labelled by one or more target objects. |
ATK_RELATION_MEMBER_OF | Indicates an object is a member of a group of one or more target objects. |
ATK_RELATION_NODE_CHILD_OF | Indicates an object is a cell in a treetable which is displayed because a cell in the same column is expanded and identifies that cell. |
ATK_RELATION_FLOWS_TO | Indicates that the object has content that flows logically to another AtkObject in a sequential way, (for instance text-flow). |
ATK_RELATION_FLOWS_FROM | Indicates that the object has content that flows logically from another AtkObject in a sequential way, (for instance text-flow). |
ATK_RELATION_SUBWINDOW_OF | Indicates a subwindow attached to a component but otherwise has no connection in the UI heirarchy to that component. |
ATK_RELATION_EMBEDS | Indicates that the object visually embeds another object's content, i.e. this object's content flows around another's content. |
ATK_RELATION_EMBEDDED_BY | Inverse of `ATK_RELATION_EMBEDS`, indicates that this object's content is visualy embedded in another object. |
ATK_RELATION_POPUP_FOR | Indicates that an object is a popup for another object. |
ATK_RELATION_PARENT_WINDOW_OF | Indicates that an object is a parent window of another object. |
ATK_RELATION_DESCRIBED_BY | Indicates that another object provides descriptive information about this object; more verbose than ATK_RELATION_LABELLED_BY. |
ATK_RELATION_DESCRIPTION_FOR | Indicates that an object provides descriptive information about another object; more verbose than ATK_RELATION_LABEL_FOR. |
ATK_RELATION_NODE_PARENT_OF | Indicates an object is a cell in a treetable and is expanded to display other cells in the same column. |
ATK_RELATION_LAST_DEFINED | Not used, this value indicates the end of the enumeration. |

## Property Details

### The `“relation-type”` property

      “relation-type”            AtkRelationType

The type of the relation.

Flags: Read / Write

Default value: ATK_RELATION_NULL

### The `“target”` property

      “target”                   GValueArray *

An array of the targets for the relation.

Flags: Read / Write