Meta.chanmod

ChannelModifier

class lxu.meta.chanmod.ChannelModifier

Base class for defining ChannelModifier servers. The client will subclass this base class, filling in the methods that they require. It’s then instantiated as a metaclass to be promoted to server. This derives from the Channels base class so needs an init_chan() method.

eval(data)

init_chan(desc)

This is passed an AttributeDesc object which is used to init the channels.

post_alloc()

Channels

class lxu.meta.chanmod.Channels

Base class for defining Channels. The client will subclass this base class, filling in the methods that they require. It’s then instantiated as a metaclass to be used by servers.

init_chan(desc)

This is passed an AttributeDesc object which is used to init the channels.

MetaInterface

class lxu.meta.chanmod.MetaInterface

The interface meta node is a sub-interface for an object or server of the same guid.

add(sub)

Add another meta object as a child of this one.

alloc()

Return the signature for this metaclass. Depends on type.

dump(prefix)

Output the contents of the meta node tree with indenting.

find_any(type, guid, miss)

Find a node with matching type/guid, searching first inside this node but searching higher up the tree until somthing matches.

find_sub(type, guid)

Find first node with a matching type/guid under this node.

flatten()

Return this meta and all sub-metas in a list.

get_ifcs(guid)

Get the list of interfaces matching the given guid under this node. The list is returned as tuples: ((class, meta), …)

init_ifcs(guid)

Initialize the _sub_ifcs attribute as a list of interfaces. If no guid is given we use the metaclass guid itself.

pre_init()

Do any self-modification or other steps before initialization. Return true as long as there is more to do.

test(type, guid)

Test this meta node against a type and guid and return true for match. All testing allows for type or guid to be None for wildcard.

Types

MetaServer

class lxu.meta.chanmod.MetaServer

The server meta node defines a plug-in server. The name and class guid must be specified, and the alloc() method (defined by the client, returns the server class. There is also a dictionary of server tags.

add(sub)

Add another meta object as a child of this one.

add_tag(key, value)

alloc()

Return the signature for this metaclass. Depends on type.

dump(prefix)

Output the contents of the meta node tree with indenting.

find_any(type, guid, miss)

Find a node with matching type/guid, searching first inside this node but searching higher up the tree until somthing matches.

find_sub(type, guid)

Find first node with a matching type/guid under this node.

flatten()

Return this meta and all sub-metas in a list.

get_ifcs(guid)

Get the list of interfaces matching the given guid under this node. The list is returned as tuples: ((class, meta), …)

init_ifcs(guid)

Initialize the _sub_ifcs attribute as a list of interfaces. If no guid is given we use the metaclass guid itself.

pre_init()

Do any self-modification or other steps before initialization. Return true as long as there is more to do.

set_username(base, key)

test(type, guid)

Test this meta node against a type and guid and return true for match. All testing allows for type or guid to be None for wildcard.

Types

Meta_ChannelModifier

class lxu.meta.chanmod.Meta_ChannelModifier

This is the metaclass for the ChannelModifier server type. This is actually a Package server metaclass, which does most of the work for us. We just need to add the channels metaclass, and the manager inerface metaclass.

add(sub)

Add another meta object as a child of this one.

add_channelui(cls)

Add a ChannelIU class

add_tag(key, value)

alloc()

Internal method

dump(prefix)

Output the contents of the meta node tree with indenting.

find_any(type, guid, miss)

Find a node with matching type/guid, searching first inside this node but searching higher up the tree until somthing matches.

find_sub(type, guid)

Find first node with a matching type/guid under this node.

flatten()

Return this meta and all sub-metas in a list.

get_ifcs(guid)

Get the list of interfaces matching the given guid under this node. The list is returned as tuples: ((class, meta), …)

init_ifcs(guid)

Initialize the _sub_ifcs attribute as a list of interfaces. If no guid is given we use the metaclass guid itself.

pre_init()

Internal method

set_supertype(typename)

Set the supertype for this package, making it an item type. If the typename is omitted then this is a root type.

set_username(base, key)

test(type, guid)

Test this meta node against a type and guid and return true for match. All testing allows for type or guid to be None for wildcard.

Types

Meta_Channels

class lxu.meta.chanmod.Meta_Channels

This is the metaclass for Channels.

add(sub)

Add another meta object as a child of this one.

alloc()

dump(prefix)

Output the contents of the meta node tree with indenting.

find_any(type, guid, miss)

Find a node with matching type/guid, searching first inside this node but searching higher up the tree until somthing matches.

find_sub(type, guid)

Find first node with a matching type/guid under this node.

flatten()

Return this meta and all sub-metas in a list.

get_ifcs(guid)

Get the list of interfaces matching the given guid under this node. The list is returned as tuples: ((class, meta), …)

init_ifcs(guid)

Initialize the _sub_ifcs attribute as a list of interfaces. If no guid is given we use the metaclass guid itself.

pre_init()

Do any self-modification or other steps before initialization. Return true as long as there is more to do.

test(type, guid)

Test this meta node against a type and guid and return true for match. All testing allows for type or guid to be None for wildcard.

Types

Meta_Package

class lxu.meta.chanmod.Meta_Package

This is the metaclass for Packages. You allocate it with the server name and optional Package sub-class.

add(sub)

Add another meta object as a child of this one.

add_channelui(cls)

Add a ChannelIU class

add_tag(key, value)

alloc()

Internal method

dump(prefix)

Output the contents of the meta node tree with indenting.

find_any(type, guid, miss)

Find a node with matching type/guid, searching first inside this node but searching higher up the tree until somthing matches.

find_sub(type, guid)

Find first node with a matching type/guid under this node.

flatten()

Return this meta and all sub-metas in a list.

get_ifcs(guid)

Get the list of interfaces matching the given guid under this node. The list is returned as tuples: ((class, meta), …)

init_ifcs(guid)

Initialize the _sub_ifcs attribute as a list of interfaces. If no guid is given we use the metaclass guid itself.

pre_init()

Internal method

set_supertype(typename)

Set the supertype for this package, making it an item type. If the typename is omitted then this is a root type.

set_username(base, key)

test(type, guid)

Test this meta node against a type and guid and return true for match. All testing allows for type or guid to be None for wildcard.

Types

Package

class lxu.meta.chanmod.Package

Base class for defining Packages. The client will subclass this base class, filling in the methods that they require. It’s then instantiated as a metaclass to be promoted to a server.

add()

Item added to scene – either on create or on delete undo.

after_load()

Item finished loading.

doomed()

Item final destroy.

initialize(super)

Initial package creation.

loading()

Item create on load.

newborn(item, flags)

Item initial creation.

parent_ok(parent)

Return true if the parent is valid.

remove()

Item removed from scene – either on delete or on create undo.

synth_name()

Return a synthetic name for the item when it has no other name.

impl_ChannelModManager

class lxu.meta.chanmod.impl_ChannelModManager

Internal class implementing ChannelModManager interface on package.

cman_Allocate(cmod)

cman_Define(cmod)

impl_ChannelModOperator

class lxu.meta.chanmod.impl_ChannelModOperator

Internal ChannelModOperator implementation does the actual work of binding and evaluating. The metaclass is meta_ChannelModManager.

cmop_Evaluate()

meta_ChannelModManager

class lxu.meta.chanmod.meta_ChannelModManager

Metaclass for the ChannelModManager defines an interface for a package.

add(sub)

Add another meta object as a child of this one.

alloc()

Internal metaclass method.

dump(prefix)

Output the contents of the meta node tree with indenting.

find_any(type, guid, miss)

Find a node with matching type/guid, searching first inside this node but searching higher up the tree until somthing matches.

find_sub(type, guid)

Find first node with a matching type/guid under this node.

flatten()

Return this meta and all sub-metas in a list.

get_ifcs(guid)

Get the list of interfaces matching the given guid under this node. The list is returned as tuples: ((class, meta), …)

init_ifcs(guid)

Initialize the _sub_ifcs attribute as a list of interfaces. If no guid is given we use the metaclass guid itself.

pre_init()

Do any self-modification or other steps before initialization. Return true as long as there is more to do.

test(type, guid)

Test this meta node against a type and guid and return true for match. All testing allows for type or guid to be None for wildcard.

Types