Class: ListEntry

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • comparing
  • printing & storing
  • queries
  • required protocol
  • string protocol
• Private classes

Inheritance:

   Object
   |
   +--ListEntry
      |
      +--ListEntry::SeparatingLineEntry
      |
      +--ModelListEntry
      |
      +--MultiColListEntry
      |
      +--Tools::NewSystemBrowser::OwnershipGraph

Package:

stx:libwidg2

Category:

Views-Support

Version:

rev: 1.27 date: 2024/04/09 12:18:53

user: stefan

file: ListEntry.st directory: libwidg2

module: stx stc-classLibrary: libwidg2

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.

copyright
COPYRIGHT (c) 1995 by Claus Gittinger
             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.

Class protocol:

 separatingLineEntry

Instance protocol:

 < aString

behave like a string when comparing

 = aString

behave like a string when comparing

 hash

return an integer useful for hashing

 printOn: aStream

(comment from inherited method)
append a user printed representation of the receiver to aStream.
The format is suitable for a human - not meant to be read back.

The default here is to output the receiver's class name.
BUT: this method is heavily redefined for objects which
can print prettier.

 printString

(comment from inherited method)
return a string for printing the receiver.
Since we now use printOn: as the basic print mechanism,
we have to create a stream and print into it.

 hasChangeOfEmphasis

return true, if the receiver contains non-empty emphasis information
i.e. any non-normal (=emphasized) characters

 hasIcon

 hasImage

 includes: aCharacter

behave like a string when testing

 size

behave like a string when asked for the size

 species

(comment from inherited method)
return a class which is similar to (or the same as) the receiver's class.
This is used to create an appropriate object when creating derived
copies in the collection classes (sometimes redefined).

 string

 asString

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

** This method must be redefined in concrete classes (subclassResponsibility) **

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

display the receiver on a GC

** This method must be redefined in concrete classes (subclassResponsibility) **

 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 must be redefined in concrete classes (subclassResponsibility) **

 widthOn: aGC

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

** This method must be redefined in concrete classes (subclassResponsibility) **

 at: index

behave like a string when accessing characters

 do: aBlock

behave like a string when enumerating characters

 withoutAnyColorEmphasis

to be redefined in subclasses

Private classes:

    SeparatingLineEntry