Hi Genevieve
thank you very much for the summary of our discussion. I'm looking
forward seeing your suggestions.
I plan to work on patch-set 4. I hope I can do that before
Christmas. Otherwise early next year.
Best Regards
Bernd
On 12/13/2013 10:53 AM, Geneviève Bastien wrote:
Thanks
to all who participated in the hack-a-thon. It was very motivating
to be able to work and discuss face to face, we'll do that again!
Here's a summary of a discussion I participated in on the xy
charts.
Purpose:
We want to be able to easily generate xy charts (bar charts, line
charts, etc), ie provide the maximum facilities so that the
developer only needs to provide the data and the chart will be
generated with good defaults. The generated charts by default will
synchronize with the trace time range, they can be zoomed in/out
and have the same general behavior as the other views of TMF.
Solution:
An abstract base class will add generic xy charts support with all
the necessary implementation to synchronize with the traces and
match the charts' behavior with that of the other views. For some
chart type (bar charts, line charts for a start), we'll provide
another abstract class, inheriting from the first, giving suitable
defaults for a given chart type. Some example charts will be
implemented to show how to generate one. Only a few methods will
need to be overriden to provide the data to plot and the chart
series. Eventually, when data-driven analysis are available, we
will add the possibility to generate charts from Xml.
Proposed plan:
Patchsets 1-2:
The TMF team at Ericsson already started working on this subject,
two patchsets are available on gerrit: one for the base xy chart
classes (https://git.eclipse.org/r/#/c/15488/), another for a
Lttng Ust memory usage chart (still a draft). I'll work on those 2
patchsets to move as much code as possible to the abstract classes
and leave only the minimum in the concrete view.
Patchset 3 (depends 1):
Add easy support of multiple series in the base classes, with
different colors, line style, etc.
Patchset 4 (depends 1):
Make sure the behavior matches that of other views: zoom, scroll,
pan, etc.
Patchset 5 (depends 1, data-driven analysis):
Add in the xml analysis plugin the possibility to define
data-driven xy charts.
We'd like to have this feature soon at Polytechnique, so I hope to
push a new version of patchsets 1 and 2 before Christmas and work
on 3 and 5 early next year.
Any thoughts?
Thanks,
Geneviève
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