| RE: [birt-charting-dev] Feature 101655 design document |
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Hi Sheldon, I have a few questions/comments: First about the existing API for event
handling. Do you believe it should be changed? It seems to me flexible enough
to support all the use cases. Maybe I am missing something here, but let me go
through this quickly: We have a InteractionEvent class, that is
a link between the action/triggers and the hotspot:
The possible actions are (from the
ActionType class)
URL_REDIRECT_LITERAL,
SHOW_TOOLTIP_LITERAL,
TOGGLE_VISIBILITY_LITERAL,
INVOKE_SCRIPT_LITERAL, The invokeScript seems fit for custom
scripting you mention. Then it’s up to the device renderer to interpret
the script. In SVG, it would be some _javascript_ that can either modify the
chart on the client-side, either send a request to the server. I would propose
to only support custom scripting in SVG for now. We probably need to improve
the engine integration with an imagemap to support other actions in static
images. For the extension point proposal, if I
understand correctly you would like to support more types of actions through an
extension mechanism instead of modifying the chart model? Regarding the server side support, I think
the cleanest approach is to have a web services interface. This can be easily
implemented in any known technology (php, servlets,…) and is a standard
way of accessing an API through HTTP. Then we’ll have to implement a
_javascript_ web services client, at least for the SVG output, that is able to
request a new chart generation from the engine. We certainly can discuss more
on that point. Making abstraction of the design, do you
have any other requirements than the use cases, that we need to take into account
for the functional specifications? We probably can add built-in support for a
few of them. Besides those, I would also propose to add
Zoom and 3D rotation support in SVG through predefined _javascript_ functions.
For server side scripting, scale change might be an interesting feature as well Thanks, David . From:
birt-charting-dev-bounces@xxxxxxxxxxx
[mailto:birt-charting-dev-bounces@xxxxxxxxxxx] On Behalf Of Sheldon Lee-Loy
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