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Creating a Pictogram link triggers refresh of entire diagram (bug?) [message #1705330]

Thu, 13 August 2015 19:45

Peder Herborg

Messages: 5
Registered: July 2009

Junior Member

Hi,

We've been investigating why our larger graphiti diagrams are very slow at refreshing when adding or removing shapes (up multiple seconds).

It turns out that this due to the fact that each shape is linked to a business object in the AddXXXFeature method:

public PictogramElement add(IAddContext context) {
...
link(imageShape, visibleGA);
...

This triggers an EMF change notification to the Diagram rootnode which causes the DiagramChangelistener to call the setRefreshAll.

Is is possible to filter out EMF change events related to link that are caused be creating a link to avoid refreshing the entire diagram or is this the intented behavior?

Best regards
Peder Herborg

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Re: Creating a Pictogram link triggers refresh of entire diagram (bug?) [message #1705554 is a reply to message #1705330]

Mon, 17 August 2015 13:17

Michael Wenz

Messages: 1931
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Peder,

well, it is the entended default behavior. For large diagrams or many links
this will result in performance issues as you describe.

You may implement your own DiagramChangeListener based on the default
implementation and replace it via DiagramBehavior.

HTH,
Michael

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