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# Atk::Component Class Reference

Inheritance diagram for Atk::Component:

[legend]
List of all members.

## Detailed Description

The ATK interface provided by UI components which occupy a physical area on the screen.

This should be implemented by most if not all UI elements with an actual on-screen presence, i.e. components which can be said to have a screen-coordinate bounding box. Virtually all widgets will need to have Atk::Component implementations provided for their corresponding Atk::Object class. In short, only UI elements which are* not* GUI elements will omit this ATK interface.

A possible exception might be textual information with a transparent background, in which case text glyph bounding box information is provided by Atk::Text.

## Public Member Functions
guint | add_focus_handler (AtkFocusHandler handler)
| Add the specified handler to the set of functions to be called when this object receives focus events (in or out).
bool | contains (int x, int y, CoordType coord_type) const
| Checks whether the specified point is within the extent of the component .
Glib::RefPtr<Atk::Object> | get_accessible_at_point (int x, int y, CoordType coord_type)
| Gets a reference to the accessible child, if one exists, at the coordinate point specified by x and y .
void | get_extents (int& x, int& y, int& width, int& height, CoordType coord_type) const
| Gets the rectangle which gives the extent of the component .
Layer | get_layer () const
| Gets the layer of the component.
int | get_mdi_zorder () const
| Gets the zorder of the component.
void | get_position (int& x, int& y, CoordType coord_type) const
| Gets the position of component in the form of a point specifying component 's top-left corner.
void | get_size (int& width, int& height) const
| Gets the size of the component in terms of width and height.
const AtkComponent* | gobj () const
| Provides access to the underlying C GObject.
AtkComponent* | gobj ()
| Provides access to the underlying C GObject.
bool | grab_focus ()
| Grabs focus for this component .
void | remove_focus_handler (guint handler_id)
| Remove the handler specified by handler_id from the list of functions to be executed when this object receives focus events (in or out).
bool | set_extents (int x, int y, int width, int height, CoordType coord_type)
| Sets the extents of component .
bool | set_position (int x, int y, CoordType coord_type)
| Sets the postition of component .
bool | set_size (int width, int height)
| Set the size of the component in terms of width and height.
virtual | ~Component ()
## Static Public Member Functions
static void | add_interface (GType gtype_implementer)
## Protected Member Functions
virtual guint | add_focus_handler_vfunc (AtkFocusHandler handler)
virtual bool | contains_vfunc (int x, int y, CoordType coord_type) const
virtual Glib::RefPtr<Atk::Object> | get_accessible_at_point_vfunc (int x, int y, CoordType coord_type)
virtual void | get_extents_vfunc (int& x, int& y, int& width, int& height, CoordType coord_type) const
virtual Layer | get_layer_vfunc () const
virtual int | get_mdi_zorder_vfunc () const
virtual void | get_position_vfunc (int& x, int& y, CoordType coord_type) const
virtual void | get_size_vfunc (int& width, int& height) const
virtual bool | grab_focus_vfunc ()
virtual void | remove_focus_handler_vfunc (guint handler_id)
virtual bool | set_extents_vfunc (int x, int y, int width, int height, CoordType coord_type)
virtual bool | set_position_vfunc (int x, int y, CoordType coord_type)
virtual bool | set_size_vfunc (int width, int height)
## Related Functions
(Note that these are not member functions.)
Glib::RefPtr<Atk::Component> | wrap (AtkComponent* object, bool take_copy=false)
| A Glib::wrap() method for this object.

## Constructor & Destructor Documentation

virtual Atk::Component::~Component | ( |  | ) | `[virtual]`

## Member Function Documentation

guint Atk::Component::add_focus_handler | ( | AtkFocusHandler | handler | ) |

Add the specified handler to the set of functions to be called when this object receives focus events (in or out).

If the handler is already added it is not added again

Parameters:

  | handler | The Atk::FocusHandler to be attached to component .

Returns:
  A handler id which can be used in atk_component_remove_focus_handler or zero if the handler was already added.

virtual guint Atk::Component::add_focus_handler_vfunc | ( | AtkFocusHandler | handler | ) | `[protected, virtual]`

static void Atk::Component::add_interface | ( | GType | gtype_implementer | ) | `[static]`

bool Atk::Component::contains | ( | int | x,
|  | int | y,
|  | CoordType | coord_type |
| ) |  |  | const

Checks whether the specified point is within the extent of the component .

Parameters:

  | x | X coordinate.
  | y | Y coordinate.
  | coord_type | Specifies whether the coordinates are relative to the screen or to the components top level window.

Returns:
  `true` or `false` indicating whether the specified point is within the extent of the component or not.

virtual bool Atk::Component::contains_vfunc | ( | int | x,
|  | int | y,
|  | CoordType | coord_type |
| ) |  |  | const`[protected, virtual]`

Glib::RefPtr<Atk::Object> Atk::Component::get_accessible_at_point | ( | int | x,
|  | int | y,
|  | CoordType | coord_type |
| ) |  |  |

Gets a reference to the accessible child, if one exists, at the coordinate point specified by x and y .

Parameters:

  | x | X coordinate.
  | y | Y coordinate.
  | coord_type | Specifies whether the coordinates are relative to the screen or to the components top level window.

Returns:
  A reference to the accessible child, if one exists.

virtual Glib::RefPtr<Atk::Object> Atk::Component::get_accessible_at_point_vfunc | ( | int | x,
|  | int | y,
|  | CoordType | coord_type |
| ) |  |  | `[protected, virtual]`

void Atk::Component::get_extents | ( | int & | x,
|  | int & | y,
|  | int & | width,
|  | int & | height,
|  | CoordType | coord_type |
| ) |  |  | const

Gets the rectangle which gives the extent of the component .

Parameters:

  | x | Address of `int` to put x coordinate.
  | y | Address of `int` to put y coordinate.
  | width | Address of `int` to put width.
  | height | Address of `int` to put height.
  | coord_type | Specifies whether the coordinates are relative to the screen or to the components top level window.

virtual void Atk::Component::get_extents_vfunc | ( | int & | x,
|  | int & | y,
|  | int & | width,
|  | int & | height,
|  | CoordType | coord_type |
| ) |  |  | const`[protected, virtual]`

Layer Atk::Component::get_layer | ( |  | ) | const

Gets the layer of the component.

Returns:
  An Atk::Layer which is the layer of the component.

virtual Layer Atk::Component::get_layer_vfunc | ( |  | ) | const`[protected, virtual]`

int Atk::Component::get_mdi_zorder | ( |  | ) | const

Gets the zorder of the component.

The value G_MININT will be returned if the layer of the component is not ATK_LAYER_MDI or ATK_LAYER_WINDOW.

Returns:
  A `int` which is the zorder of the component, i.e. the depth at which the component is shown in relation to other components in the same container.

virtual int Atk::Component::get_mdi_zorder_vfunc | ( |  | ) | const`[protected, virtual]`

void Atk::Component::get_position | ( | int & | x,
|  | int & | y,
|  | CoordType | coord_type |
| ) |  |  | const

Gets the position of component in the form of a point specifying component 's top-left corner.

Parameters:

  | x | Address of `int` to put x coordinate position.
  | y | Address of `int` to put y coordinate position.
  | coord_type | Specifies whether the coordinates are relative to the screen or to the components top level window.

virtual void Atk::Component::get_position_vfunc | ( | int & | x,
|  | int & | y,
|  | CoordType | coord_type |
| ) |  |  | const`[protected, virtual]`

void Atk::Component::get_size | ( | int & | width,
|  | int & | height |
| ) |  |  | const

Gets the size of the component in terms of width and height.

Parameters:

  | width | Address of `int` to put width of component .
  | height | Address of `int` to put height of component .

virtual void Atk::Component::get_size_vfunc | ( | int & | width,
|  | int & | height |
| ) |  |  | const`[protected, virtual]`

const AtkComponent* Atk::Component::gobj | ( |  | ) | const`[inline]`

Provides access to the underlying C GObject.

Reimplemented from Glib::Interface.

Reimplemented in Atk::NoOpObject.

AtkComponent* Atk::Component::gobj | ( |  | ) | `[inline]`

Provides access to the underlying C GObject.

Reimplemented from Glib::Interface.

Reimplemented in Atk::NoOpObject.

bool Atk::Component::grab_focus | ( |  | ) |

Grabs focus for this component .

Returns:
  `true` if successful, `false` otherwise.

virtual bool Atk::Component::grab_focus_vfunc | ( |  | ) | `[protected, virtual]`

void Atk::Component::remove_focus_handler | ( | guint | handler_id | ) |

Remove the handler specified by handler_id from the list of functions to be executed when this object receives focus events (in or out).

Parameters:

  | handler_id | The handler id of the focus handler to be removed from component .

virtual void Atk::Component::remove_focus_handler_vfunc | ( | guint | handler_id | ) | `[protected, virtual]`

bool Atk::Component::set_extents | ( | int | x,
|  | int | y,
|  | int | width,
|  | int | height,
|  | CoordType | coord_type |
| ) |  |  |

Sets the extents of component .

Parameters:

  | x | X coordinate.
  | y | Y coordinate.
  | width | Width to set for component .
  | height | Height to set for component .
  | coord_type | Specifies whether the coordinates are relative to the screen or to the components top level window.

Returns:
  `true` or `false` whether the extents were set or not.

virtual bool Atk::Component::set_extents_vfunc | ( | int | x,
|  | int | y,
|  | int | width,
|  | int | height,
|  | CoordType | coord_type |
| ) |  |  | `[protected, virtual]`

bool Atk::Component::set_position | ( | int | x,
|  | int | y,
|  | CoordType | coord_type |
| ) |  |  |

Sets the postition of component .

Parameters:

  | x | X coordinate.
  | y | Y coordinate.
  | coord_type | Specifies whether the coordinates are relative to the screen or to the components top level window.

Returns:
  `true` or `false` whether or not the position was set or not.

virtual bool Atk::Component::set_position_vfunc | ( | int | x,
|  | int | y,
|  | CoordType | coord_type |
| ) |  |  | `[protected, virtual]`

bool Atk::Component::set_size | ( | int | width,
|  | int | height |
| ) |  |  |

Set the size of the component in terms of width and height.

Parameters:

  | width | Width to set for component .
  | height | Height to set for component .

Returns:
  `true` or `false` whether the size was set or not.

virtual bool Atk::Component::set_size_vfunc | ( | int | width,
|  | int | height |
| ) |  |  | `[protected, virtual]`

## Friends And Related Function Documentation

Glib::RefPtr<Atk::Component> wrap | ( | AtkComponent * | object,
|  | bool | take_copy = `false` |
| ) |  |  | `[related]`

A Glib::wrap() method for this object.

Parameters:

  | object | The C instance.
  | take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns:
  A C++ instance that wraps this C instance.

The documentation for this class was generated from the following file:

- component.h