[Pipet Devel] excerpt from CHANGES

J.W. Bizzaro bizzaro at geoserve.net
Wed Feb 9 00:18:05 EST 2000

Sorry if I'm posting this sooner than you'd like.  I wanted to comment on some
things (next message).

2/8/00 Brad
* Got all of the below database stuff working for MySQL, PostgreSQL and 
Gadfly (at least, it seems to be working okay for my simple examples). 
Shouldn't be too hard to add more dbs if people want them...

2/7/00 Brad
* Can now drag and drop databases and tables.
* Created a table_view widget (just a CList with mutliple columns--it 
appears that that is the most widely used widget to display database 
contents). Dragging a table out of a container onto the desktop shows its 
contents in the table view widget.
* Got the list and tree representations working for viewing database 
* file_select widgets now update their xml to try and keep the xml current 
with the file located in the selection widget.

2/6/00 Brad
* Now you can view database information in a container in tree view only.
* Started working on dragging databases and tables out of a container onto 
the desktop.

2/4/00 Brad
* Changed up the buttons on container to get ready to add database info to
* Started adding database connection utilities. Right now I'm working with
MySQL and MySQLdb since I've already got MySQL with tables filled on my 
computer. So far, there is a basic database selection window that pops up. 
A connection is then established with the database.
* Did some internal stuff to get more working. Will continue on this...

2/1/00 Brad
* Added drag and drop stuff so that you can now drag items out of a 
container unto any workspace. A new locus will be created for the dragged 
item on the workspace that it is dragged to. The locus contains the 
information from the dragged item in the container. For now, this only 
works for documents and containers (since containers can only currently 
hold documents and containers).

1/31/00 Brad
* Did a lot of messing around with the problem of losing clicks from 
internal windowlets to the main workspace. Discovered the problem, and 
thought up a solution:
Problem: What is happening is that the events from a windowlet gui are 
being passed on to the parent widget (the main workspace) and then are 
being taken care of again by a second event handler. To add onto this 
problem, the coordinates (ie. event.x, event.y) of the event in the 
mainworkspace are the same as the coordinates in the internal workspace, 
so the main workspace recieves an event that it thinks is happening on a 
location in its workspace that is not behind the windowlet window, but at 
the relative position in its window that the event happened in the 
windowlet window. Ugly problem! Although this happens for every click on 
the windowlet, currently the only problem it causes is with the button 3 
click to open a menu. Two menus will be opened--one for the internal 
windowlet, and then one for the main workspace.
Solution: Attached an event handler to the gui which returns TRUE if 
a button 3 click is recieved. This prevents the signal from being 
propogated past the initial menu click.
Problem with the Solution: This solution also prevents button 3 clicks from 
being propogated to loci within an internal windowlet. So we can't use a
button 3 
click for anything specific to a loci, or within a GUI.

                      |           J.W. Bizzaro           |
                      |                                  |
                      | http://bioinformatics.org/~jeff/ |
                      |                                  |
                      |        BIOINFORMATICS.ORG        |
                      |           The Open Lab           |
                      |                                  |
                      |    http://bioinformatics.org/    |

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