Class: ListEntry

• Inheritance
• Description
• Related information
• Instance protocol
  • printing & storing
  • queries
  • required protocol
  • string protocol

Inheritance:

   Object
   |
   +--ListEntry
      |
      +--ModelListEntry
      |
      +--MultiColListEntry

Package:

stx:libwidg2

Category:

Views-Support

Version:

rev: 1.20 date: 2009/10/16 09:11:08

user: cg

file: ListEntry.st directory: libwidg2

module: stx stc-classLibrary: libwidg2

Author:

Claus Gittinger

Description:

ListEntry is an abstract superclass for objects which can be used
in place of strings in ListViews or SelectionInListViews.

If you want to create new subclasses, implement (at least) the methods
found in the 'required protocol' category.

Related information:

    ListView

Instance protocol:

 printOn: aStream

 printString

 hasIcon

 hasImage

 includes: aCharacter

behave like a string when testing

 size

behave like a string when asked for the size

 species

 string

 asString

return the receiver as a string (for example, to store it in a file)

** This method raises an error - it must be redefined in concrete classes **

 displayOn: aGC x: x y: y opaque: opaque

display the receiver on a GC

** This method raises an error - it must be redefined in concrete classes **

 heightOn: aGC

return the height of the receiver when displayed in aGC.
Assume the GC's font is taken. If that is not the case in a
particular subclass, this method is to be redefined there.

 sameStringAndEmphasisAs: aStringOrText

** This method raises an error - it must be redefined in concrete classes **

 widthOn: aGC

return the width (in device units) of the receiver when displayed in aGC

** This method raises an error - it must be redefined in concrete classes **

 < aString

behave like a string when comparing

 = aString

behave like a string when comparing

 at: index

behave like a string when accessing characters

 do: aBlock

behave like a string when enumerating characters

 hash

return an integer useful for hashing