[seek-dev] Try out an alpha version of the Query Builder (actor)

[Rod Spears]

All the widgets are standard Swing Controls, but the majority of the 
code is where I subclassed various Swing classes to provide explicit 
functionality or extended functionality.

The only part that will not scale well is the DesktopPane with the table 
"frames" and the drawing of the links. At the moment it all get 
invalidated and redrawn when dragging around a frame. So the more 
tables, the slower it gets. The scalability and performance can be much 
imporved with a better algorithm for "dirtying" the appropriate areas of 
the desktop pane.


Also, the tool accepts a set of interfaces representing the schema, this 
morning I took the TableEntity and Attribute classes and implemented the 
interfaces (5 minutes of work) and the Query Builder can now use these 
classes as input instead of my "light weight" versions.

One of the UI challenges was to create a UI with no menus and would not 
require the selection of a row for deleting or updating. The most 
unintuitive thing in the UI is that you set the table name to a blank 
name to delete it, MS-Access users should not have a big issue with 
that. A user can use D&D, but it isn't a requirement.


I am still documenting the classes themselves, but here is the javadoc 
so far: http://129.237.201.166:8080/ogsa/qb/doc/index.html

Rod



Chad Berkley wrote:

> That's pretty cool Rod.  Were you able to find some pre-made widgets 
> or did you write the whole thing?  Seems to work well on my 
> fedora/mozilla box.  How is the schema for the DB being read in (i.e. 
> how can I change the schema)?
>
> chad
>
> Rod Spears wrote:
>
>> http://129.237.201.166:8080/ogsa/qb/QueryBuilder.html
>>
>> Let me know if you discover any problems.
>> One know problem is the "desktop" pane in advance mode should grow to 
>> accomodate tables that are moved around, instead of clipping them.
>>
>> Rod
>>
>> _______________________________________________
>> seek-dev mailing list
>> seek-dev at ecoinformatics.org
>> http://www.ecoinformatics.org/mailman/listinfo/seek-dev
>

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