RE: [Dynapyide-developer] Creating a foundation

[Creighton K. <cki...@ho...>]

Okay I think we are getting a head of our selves.  Jason and I are going to
get together this weekend and hash some of the architecture out for the
major components.  What Jason is trying to describe is a method for
representing graphical components on the screen and then translating them to
real text format in this case HTML.  Below is the basic functions a browser
has to do to display a page (our gui will have to do similar).

1.  Reads in the HTML/JavaScript

2.  Parse it into an object tree (in java this is an object the implements
the Document interface)

3.  It then figures out how big the display area is. (Window size or size of
largest non-wrappable item i.e. a table or image)  

4.  Traverses the tree deciding where line returns need to go for word
wrapping. (Realize that during this it is essentially breaking the document
into display lines)

4a. Each line must know its height (this is the height of the tallest
element in the line) 

6.  Then the document is drawn line by line moving down the line height
before it draws the next one.  Each element renders its self and then its
children.  A table is in a line however it may have the same steps mentioned
above playing out in each cell.

This is a very simplistic view.  In reality there is a lot of optimization
that goes into this to do what I suggest in as few passes of the data as
needed.  I have been looking at code of different browsers and graphical
editors.

P.S. In my last message I included a file with the fix to the about box
problem.  Simply take that file and replace the bad one with it.

Creighton Kirkendall 




-----Original Message-----
From: Javier Nievas [mailto:jav...@ya...] 
Sent: Tuesday, February 12, 2002 3:24 PM
To: DynAPI IDE
Subject: Re: [Dynapyide-developer] Creating a foundation


> * Array of Objects  -  images, tables, text, ...;  this will be objects
> compiled into HTML
> * Array of ObjectPositions  -  matching array that give relative
positioning
> of objects above;
> * Array of Events  -  responses to events on the layer level (mouse
clicks,
> mouse over, ...)
> * Position  -  Absolute position of layer on base layer
> * Size - height and width of layer
> * Background Color  -  color of layer (may be clear, i think)

I don't understand the first and second array, What are you thinking about?
What's an image or a table? (I know what are them... but, Why are you
considering them as objects "inside" a layer?)

And, I don't understand why are you putting an array for object positions,
that "objects" you mention don't have an absolute position...

I think, we should have an array of child layers and add a HTML_Content
property

Well, I'm not a great programmer... but I just don't understand that, maybe
it is an stupid question...





----- Original Message -----
From: "DeWeese, Jason" <jde...@ba...>
To: "DynAPI IDE Developers (E-mail)"
<dyn...@li...>
Sent: Tuesday, February 12, 2002 8:51 PM
Subject: [Dynapyide-developer] Creating a foundation


> All -
>
> To start we need to create an abstract java interface that
> encapsulates what a layer contains on the most basic level.
>
>
> Layer  -  abstract interface representation of a dynAPI layer
> -----------
> * Array of Objects  -  images, tables, text, ...;  this will be objects
> compiled into HTML
> * Array of ObjectPositions  -  matching array that give relative
positioning
> of objects above;
> * Array of Events  -  responses to events on the layer level (mouse
clicks,
> mouse over, ...)
> * Position  -  Absolute position of layer on base layer
> * Size - height and width of layer
> * Background Color  -  color of layer (may be clear, i think)
>
>
> These are the properties handled by the dynAPI we are using as our
> core.  There might be more, but I think these are the bare minimums.  If
we
> come to an agreement early on the basics, we will have a good start.
>
> Unrelated to the previous here is some code for a basic system file
> viewer I created.  It is far from finished, it has some resizing issue and
> no real funtionality.  We could eventually use it as a part of a project
> viewer.
>
>  <<JFileTree.java>>  <<FileTree.java>>
>
>
>
>


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