Class: HierarchicalItem

• Inheritance
• Description
• Instance protocol
  • accessing
  • private
  • protocol-displaying
  • queries
• Private classes

Inheritance:

   Object
   |
   +--AbstractHierarchicalItem
      |
      +--AbstractHierarchicalItemWithModel
         |
         +--HierarchicalItem
            |
            +--Bookmark
            |
            +--HierarchicalFileList::HierarchicalFileItem
            |
            +--HierarchicalItem::Example
            |
            +--HierarchicalItemWithLabel
            |
            +--HierarchicalItemWithValue
            |
            +--Tools::ChangeList::ListEntry
            |
            +--Tools::HierarchicalChangesetDialog::Change
            |
            +--Tools::LintRuleList::ListEntry
            |
            +--Tools::ProfilerInfoItem
            |
            +--Tools::TestRunner2::ResultList::ListEntry
            |
            +--Tools::VisualProfilerCanvas::CallTreeItem
            |
            +--VersionDiffBrowser::ClassChangeSet

Package:

stx:libwidg2

Category:

Views-Support

Version:

rev: 1.123 date: 2021/01/20 13:13:53

user: cg

file: HierarchicalItem.st directory: libwidg2

module: stx stc-classLibrary: libwidg2

Description:

Hierarchical Items are mostly like Models, but the list of
dependencies are kept by its HierarchicalList.
Instances of (subclasses of) me are used to build up hierarchical trees.
This class is usually subclassed, to add label, icon or value (reference to some info)
to the tree item.

[Instance variables:]
    parent      <Item, List or nil>         parent or my HierarchicalList.
    children    <Collection or nil>         list of children
    isExpanded  <Boolean>                   indicates whether the item is
                                            expanded or collapsed
    width       <Integer>                   cached width of displayed label
    height      <Integer>                   cached height of displayed label

copyright
COPYRIGHT (c) 1999 by eXept Software AG
             All Rights Reserved

This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice.   This software may not
be provided or otherwise made available to, or used by, any
other person.  No title to or ownership of the software is
hereby transferred.

Instance protocol:

 height

return the cached height

 height: something

set the cached height

 width

return the cached width

 width: something

set the cached width

 width: w height: h

 width: w height: h isExpanded: expanded

 fetchChildren

should compute the list of children via the model.
The default here is to ask the model for the children.
*** to optimize: redefine in subClass

 makeWidthAndHeightUnknown

 setExpanded: aBoolean

set expanded flag without any computation or notification

 heightOn: aGC

return the height of the receiver, if it is to be displayed on aGC

 widthOn: aGC

return the width of the receiver, if it is to be displayed on aGC

 isExpanded

returns true if the item is expanded

Private classes:

    Example