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API reference - Class LayerInfo

Notation used in Ruby API documentation

Description: A structure encapsulating the layer properties

• Public constructors
• Public methods
• Public static methods and constants
• Deprecated methods (protected, public, static, non-static and constructors)
• Detailed description

The layer properties describe how a layer is stored in a GDS2 or OASIS file for example. The LayerInfo object represents the storage properties that are attached to a layer in the database.

In general, a layer has either a layer and a datatype number (in GDS2), a name (for example in DXF or CIF) or both (in OASIS). In the latter case, the primary identification is through layer and datatype number and the name is some annotation attached to it. A LayerInfo object which specifies just a name returns true on is_named?. The LayerInfo object can also specify an anonymous layer (use LayerInfo#new without arguments). Such a layer will not be stored when saving the layout. They can be employed for temporary layers for example. Use LayerInfo#anonymous? to test whether a layer does not have a specification.

The LayerInfo is used for example in Layout#insert_layer to specify the properties of the new layer that will be created. The is_equivalent? method compares two LayerInfo objects using the layer and datatype numbers with a higher priority over the name.

Public constructors

Public methods

Public static methods and constants

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

Detailed description

[const] bool !=(const LayerInfo b)

Description: Compare two layer info objects

This method was added in version 0.18.

[const] bool ==(const LayerInfo b)

Description: Compare two layer info objects

This method was added in version 0.18.

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.

[const] bool anonymous?

Description: Returns true, if the layer has no specification (i.e. is created by the default constructor).

This method was added in version 0.23.

void assign(const LayerInfo other)

Description: Assigns another object to self

void create

Description: Ensures the C++ object is created

Use of this method is deprecated. Use _create instead

[const] int datatype

Description: Gets the datatype

Python specific notes:

The object exposes a readable attribute 'datatype'. This is the getter.

void datatype=(int datatype)

Description: Set the datatype

Python specific notes:

The object exposes a writable attribute 'datatype'. This is the setter.

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 LayerInfo ptr dup

Description: Creates a copy of self

[static] LayerInfo from_string(string s)

Description: Create a layer info object from a string

This method will take strings as produced by to_s and create a LayerInfo object from them. The format is either "layer", "layer/datatype", "name" or "name (layer/datatype)".

This method was added in version 0.23.

[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

[const] bool is_equivalent?(const LayerInfo b)

Description: Equivalence of two layer info objects

First, layer and datatype are compared. The name is of second order and used only if no layer or datatype is given. This is basically a weak comparison that reflects the search preferences.

This method was added in version 0.18.

[const] bool is_named?

Description: Returns true, if the layer is purely specified by name.

This method was added in version 0.18.

[const] int layer

Description: Gets the layer number

Python specific notes:

The object exposes a readable attribute 'layer'. This is the getter.

void layer=(int layer)

Description: Sets the layer number

Python specific notes:

The object exposes a writable attribute 'layer'. This is the setter.

[const] string name

Description: Gets the layer name

Python specific notes:

The object exposes a readable attribute 'name'. This is the getter.

void name=(string name)

Description: Set the layer name

The name is set on OASIS input for example, if the layer has a name.

Python specific notes:

The object exposes a writable attribute 'name'. This is the setter.

[static] new LayerInfo ptr new

Description: The default constructor.

Creates a default LayerInfo object.

This method was added in version 0.18.

Python specific notes:

This method is the default initializer of the object

[static] new LayerInfo ptr new(int layer,int datatype)

Description: The constructor for a layer/datatype pair.

Creates a LayerInfo object representing a layer and datatype.

This method was added in version 0.18.

Python specific notes:

This method is the default initializer of the object

[static] new LayerInfo ptr new(string name)

Description: The constructor for a named layer.

Creates a LayerInfo object representing a named layer.

This method was added in version 0.18.

Python specific notes:

This method is the default initializer of the object

[static] new LayerInfo ptr new(int layer,int datatype,string name)

Description: The constructor for a named layer with layer and datatype.

Creates a LayerInfo object representing a named layer with layer and datatype.

This method was added in version 0.18.

Python specific notes:

This method is the default initializer of the object

[const] string to_s

Description: Convert the layer info object to a string

This method was added in version 0.18.

Python specific notes:

This method is also available as 'str(object)'