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atk.Component — the ATK interface provided by UI components that occupy a physical area on the screen.

Synopsis

class atk.Component(gobject.GInterface):
    def contains(x, y, coord_type)
    def ref_accessible_at_point(x, y, coord_type)
    def get_extents(coord_type)
    def get_position(coord_type)
    def get_size()
    def grab_focus()
    def remove_focus_handler(handler_id)
    def set_extents(x, y, width, height, coord_type)
    def set_position(x, y, coord_type)
    def set_size(width, height)
    def get_layer()
    def get_mdi_zorder()

atk.Component Signal Prototypes

"bounds-changed"

 def callback(atkcomponent, rect, user_param1, ...)

Description

atk.Component 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.

Methods

atk.Component.contains

    def contains(x, y, coord_type)

x :

x coordinate

y :

y coordinate

coord_type :

specifies whether the coordinates are relative to the screen or to the components top level window - one of the Atk Coord Type Constants

Returns :

True or False indicating whether the specified point is within the extent of the component or not

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

atk.Component.ref_accessible_at_point

    def ref_accessible_at_point(x, y, coord_type)

x :

x coordinate

y :

y coordinate

coord_type :

specifies whether the coordinates are relative to the screen or to the components top level window - one of the Atk Coord Type Constants

Returns :

an atk.Object reference to the accessible child, if one exists

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

atk.Component.get_extents

    def get_extents(coord_type)

coord_type :

specifies whether the coordinates are relative to the screen or to the components top level window - one of the Atk Coord Type Constants

Returns :

a 4-tuple containing the x, y position coordinates and the width and height of the component.

Gets the rectangle which gives the extent of the component.

atk.Component.get_position

    def get_position(coord_type)

coord_type :

specifies whether the coordinates are relative to the screen or to the components top level window - one of the Atk Coord Type Constants

Returns :

a 2-tuple containing the x, y position coordinates of the component.

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

atk.Component.get_size

    def get_size()

Returns :

a 2-tuple containing the width and height of the component.

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

atk.Component.grab_focus

    def grab_focus()

Returns :

True if successful, False otherwise.

Grabs focus for this component.

atk.Component.remove_focus_handler

    def remove_focus_handler(handler_id)

handler_id :

the handler id of the focus handler to be removed from component

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

atk.Component.set_extents

    def set_extents(x, y, width, height, coord_type)

x :

x coordinate

y :

y coordinate

width :

width to set for the component

height :

height to set for the component

coord_type :

specifies whether the coordinates are relative to the screen or to the components top level window - one of the Atk Coord Type Constants

Returns :

True if the extents were set

Sets the extents of the component.

atk.Component.set_position

    def set_position(x, y, coord_type)

x :

x coordinate

y :

y coordinate

coord_type :

specifies whether the coordinates are relative to the screen or to the components top level window - one of the Atk Coord Type Constants

Returns :

True if the position was set

Sets the postition of the component.

atk.Component.set_size

    def set_size(width, height)

width :

width to set for component

height :

height to set for component

Returns :

True if the size was set

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

atk.Component.get_layer

    def get_layer()

Returns :

one of the Atk Layer Constants which is the layer of the component

Gets the layer of the component.

atk.Component.get_mdi_zorder

    def get_mdi_zorder()

Returns :

an integer 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.

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.

Signals

The "bounds-changed" atk.Component Signal

    def callback(atkcomponent, rect, user_param1, ...)

atkcomponent :

the object which received the signal.

rect :

The atk.Rectangle giving the new position and size.

user_param1 :

the first user parameter (if any) specified with the connect() method

... :

additional user parameters (if any)

The 'bounds-changed" signal is emitted when the bposition or size of the a component changes.

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