[Fenfire-dev] (Alph) PEG imagescrollblock--humppake

[Asko Soukka]

==========================================================================
PEG imagescrollblock--humppake: interface ImageScrollBlock
==========================================================================

:Authors:  Asko Soukka
:Date-Created: 2003-09-03
:Last-Modified: $Date: 2003/07/28 13:53:51 $
:Revision: $Revision: 1.4 $
:Status:   Current
:Status:   Incomplete
:Scope:    Minor
:Type:     Interface

This PEG prososes a new Alph scroll block type: ImageScrollBlock.

Issues
======

What would ImageScrollBlock be?

    RESOLVED: ImageScrollBlock would be the interface for
    Alph scroll blocks containing only a single image.

Aren't current interfaces enough?

    RESOLVED: The currently existing scroll block interfaces are
    PageScrollBlock and TextScrollBlock, both extending the basic
    ScrollBlock interface. TextScrollBlock is meant for text and
    PageScrollBlock for PDF and PS documents.
 
    Scroll blocks containing single images should be handled
    separately from both the text scroll blocks and PDF/PS document
    scroll blocks. Therefore, they need their own scroll block
    interface.

What spesific methods should the new interface provide?

    RESOLVED: None for now. The interface is currently needed only
    to separate ImageScrollBlocks from other ScrollBlocks. New 
    ImageScrollBlock spesific methods could be pegged later, if
    found necessary.

Changes
=======

The creation of interface ``org.nongnu.alph.ImageScrollBlock``.

Changing SimpleImageScroll to implement the new interface. No changes
into SimpleImageScroll's code is needed.



-- 
Asko Soukka <address@hidden>
<http://www.iki.fi/asko.soukka/>