API reference - Class LayerPropertiesNode

Notation used in Ruby API documentation

Description: A layer properties node structure

Class hierarchy: LayerPropertiesNode » LayerProperties

This class is derived from LayerProperties. Objects of this class are used in the hierarchy of layer views that are arranged in a tree while the LayerProperties object reflects the properties of a single node.

Public constructors

new LayerPropertiesNode ptrnewCreates a new object of this class

Public methods

[const]bool!=(const LayerPropertiesNode other)Inequality
[const]bool==(const LayerPropertiesNode other)Equality
void_createEnsures the C++ object is created
void_destroyExplicitly destroys the object
[const]bool_destroyed?Returns a value indicating whether the object was already destroyed
[const]bool_is_const_object?Returns a value indicating whether the reference is a const reference
void_manageMarks the object as managed by the script side.
void_unmanageMarks the object as no longer owned by the script side.
LayerPropertiesNode ptradd_child(const LayerProperties child)Add a child entry
voidassign(const LayerPropertiesNode other)Assigns another object to self
[const]DBoxbboxCompute the bbox of this layer
voidclear_childrenClears all children
[const]new LayerPropertiesNode ptrdupCreates a copy of self
[const]LayerPropertiesNodeflatreturn the "flattened" (effective) layer properties node for this node
[const]boolhas_children?Test, if there are children
[const]unsigned intidObtain the unique ID

Deprecated methods (protected, public, static, non-static and constructors)

voidcreateUse of this method is deprecated. Use _create instead
voiddestroyUse of this method is deprecated. Use _destroy instead
[const]booldestroyed?Use of this method is deprecated. Use _destroyed? instead
[const]boolis_const_object?Use of this method is deprecated. Use _is_const_object? instead

Detailed description

[const] bool !=(const LayerPropertiesNode other)

Description: Inequality

other:The other object to compare against

[const] bool ==(const LayerPropertiesNode other)

Description: Equality

other:The other object to compare against

void _create

Description: Ensures the C++ object is created

Use this method to ensure the C++ object is created, for example to ensure that resources are allocated. Usually C++ objects are created on demand and not necessarily when the script object is created.

void _destroy

Description: Explicitly destroys the object

Explicitly destroys the object on C++ side if it was owned by the script interpreter. Subsequent access to this object will throw an exception. If the object is not owned by the script, this method will do nothing.

[const] bool _destroyed?

Description: Returns a value indicating whether the object was already destroyed

This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself.

[const] bool _is_const_object?

Description: Returns a value indicating whether the reference is a const reference

This method returns true, if self is a const reference. In that case, only const methods may be called on self.

void _manage

Description: Marks the object as managed by the script side.

After calling this method on an object, the script side will be responsible for the management of the object. This method may be called if an object is returned from a C++ function and the object is known not to be owned by any C++ instance. If necessary, the script side may delete the object if the script's reference is no longer required.

Usually it's not required to call this method. It has been introduced in version 0.24.

void _unmanage

Description: Marks the object as no longer owned by the script side.

Calling this method will make this object no longer owned by the script's memory management. Instead, the object must be managed in some other way. Usually this method may be called if it is known that some C++ object holds and manages this object. Technically speaking, this method will turn the script's reference into a weak reference. After the script engine decides to delete the reference, the object itself will still exist. If the object is not managed otherwise, memory leaks will occur.

Usually it's not required to call this method. It has been introduced in version 0.24.

LayerPropertiesNode ptr add_child(const LayerProperties child)

Description: Add a child entry

Returns:A reference to the node created

This method allows to build a layer properties tree by adding children to node objects. It returns a reference to the node object created.

This method was introduced in version 0.22.

void assign(const LayerPropertiesNode other)

Description: Assigns another object to self

[const] DBox bbox

Description: Compute the bbox of this layer

Returns:A bbox in micron units

This takes the layout and path definition (supported by the given default layout or path, if no specific is given). The node must have been attached to a view to make this operation possible.

void clear_children

Description: Clears all children

This method was introduced in version 0.22.

void create

Description: Ensures the C++ object is created

Use of this method is deprecated. Use _create instead

void destroy

Description: Explicitly destroys the object

Use of this method is deprecated. Use _destroy instead

[const] bool destroyed?

Description: Returns a value indicating whether the object was already destroyed

Use of this method is deprecated. Use _destroyed? instead

[const] new LayerPropertiesNode ptr dup

Description: Creates a copy of self

[const] LayerPropertiesNode flat

Description: return the "flattened" (effective) layer properties node for this node

This method returns a LayerPropertiesNode object that is not embedded into a hierarchy. This object represents the effective layer properties for the given node. In particular, all 'local' properties are identical to the 'real' properties. Such an object can be used as a basis for manipulations.

Unlike the name suggests, this node will still contain a hierarchy of nodes below if the original node did so.

[const] bool has_children?

Description: Test, if there are children

[const] unsigned int id

Description: Obtain the unique ID

Each layer properties node object has a unique ID that is created when a new LayerPropertiesNode object is instantiated. The ID is copied when the object is copied. The ID can be used to identify the object irregardless of it's content.

[const] bool is_const_object?

Description: Returns a value indicating whether the reference is a const reference

Use of this method is deprecated. Use _is_const_object? instead

[static] new LayerPropertiesNode ptr new

Description: Creates a new object of this class

Python specific notes:

This method is the default initializer of the object