Class: AbstractHierarchicalItemWithModel

• Inheritance
• Description
• Related information
• Class protocol
  • queries
• Instance protocol
  • accessing-mvc

Inheritance:

   Object
   |
   +--AbstractHierarchicalItem
      |
      +--AbstractHierarchicalItemWithModel
         |
         +--CompactHierarchicalItem
         |
         +--HierarchicalItem

Package:

stx:libwidg2

Category:

Views-Support

Version:

rev: 1.4 date: 2021/12/02 19:27:02

user: cg

file: AbstractHierarchicalItemWithModel.st directory: libwidg2

module: stx stc-classLibrary: libwidg2

Author:

Claus Gittinger

Description:

documentation to be added.


[instance variables:]

[class variables:]

Related information:

Class protocol:

 isAbstract

Return if this class is an abstract class.
True is returned here for myself only; false for subclasses.
Abstract subclasses must redefine this again.

Instance protocol:

 fetchModel

fetches the hierachicalList model by walking along the parent chain
up to an item which already knows its model.
This is a slightly less stupid implementation than the iinherited one

 model

returns the hierachicalList model; fetches it if not yet known
This fixes the stupid implementation of the old HierarchicalItem,
by caching the fetched model (behaving the same, if there is no model)

 model: aHierarchicalList

sets the hierachicalList model or nil.
If never set, the old (stupid) code which walks along the parent chain
will fetch the model o the fly.
By setting it explicitly, when the item is created, this is avoided.

 modelOrNil

returns the hierachicalList model or nil.
Does NOT fetch the model if nil