Component

Object Hierarchy:

Description:

[ CCode ( type_id = "atk_component_get_type ()" ) ]
public interface Component : Object

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 Component implementations provided for their corresponding 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 Text.

All known implementing classes:

NoOpObject

Plug

Socket

Namespace: Atk

Package: atk

Content:

Methods:

public abstract uint add_focus_handler (FocusHandler handler)
Add the specified handler to the set of functions to be called when this object receives focus events (in or out).
public abstract bool contains (int x, int y, CoordType coord_type)
Checks whether the specified point is within the extent of the this.
public abstract double get_alpha ()
Returns the alpha value (i.e. the opacity) for this this, on a scale from 0 (fully transparent) to 1.0 (fully opaque).
public abstract void get_extents (out int x, out int y, out int width, out int height, CoordType coord_type)
Gets the rectangle which gives the extent of the this.
public abstract Layer get_layer ()
Gets the layer of the component.
public abstract int get_mdi_zorder ()
Gets the zorder of the component.
public abstract void get_position (out int x, out int y, CoordType coord_type)
Gets the position of this in the form of a point specifying this's top-left corner.
public abstract void get_size (out int width, out int height)
Gets the size of the this in terms of width and height.
public abstract bool grab_focus ()
Grabs focus for this this.
public abstract Object? ref_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.
public abstract void remove_focus_handler (uint 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).
public abstract bool scroll_to (ScrollType type)
Makes this visible on the screen by scrolling all necessary parents.
public abstract bool scroll_to_point (CoordType coords, int x, int y)
Move the top-left of this to a given position of the screen by scrolling all necessary parents.
public abstract bool set_extents (int x, int y, int width, int height, CoordType coord_type)
Sets the extents of this.
public abstract bool set_position (int x, int y, CoordType coord_type)
Sets the position of this.
public abstract bool set_size (int width, int height)
Set the size of the this in terms of width and height.

Signals:

public virtual signal void bounds_changed (Rectangle bounds)
The 'bounds-changed" signal is emitted when the bposition or size of the component changes.

Inherited Members:

All known members inherited from class GLib.Object