Do you have lots of figures in the same parent? There's an n^2 performance
issue in the way that lightweight system handle focus gained. It hasn't
been fixed, but you can workaround it by configuring the parent figure as
not containing focusable descendants, somehow.
Manuel SELVA
<manuel.selva@st.
com> To
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Subject
07/19/2007 10:30 Re: [gef-dev] SWT / Draw2d Events
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Please respond to
GEF development
<gef-dev@eclipse.
org>
Randy Hudson a écrit :
Do you have a drag source? See this bug:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=10420
But in my head I though this was no longer an issue.
-Randy
Manuel SELVA
<manuel.selva@st.
com>
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07/19/2007 04:18 [gef-dev] SWT / Draw2d Events
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Please respond to
GEF development
<gef-dev@eclipse.
org>
Hi all,
I am having a very strange behaviour, (i suppose i my own code) dealing
with Draw2d events inside a very large chart.
I created an eclipse view which contents is mainly a FigureCanvas
containing a lot of rectangle figures. These figures are "selectable" at
Draw2D sense (click on it enlarge and change the color of the border)
and at Eclipse sense (it fires a SelectionChanged event). My problem is
the following :
Sometimes (always reproductible on the first click) the listener on the
"clicked figure" is only notified after about 1 second ... this is too
longgggg for a user interface operation. Of course i had an inkling on
my code, for example an other listener notified before the instersting
one performing some long operation.
But after a lot of tests here is my conclusion :
i can't understand anything .... can't find where this 1 second is
lost ... I putted a simple System.out.print in the internal class of
LightWheightSystem
EventHandler (in mouseDown method before dispatching the event) and
noticed that it also about takes one second to come here !!!
Does it mean that SWT is responsible for the problem, can't think
such a thing since when my chart doesn't contain many figure this
doesn't hapen ...
Does anybody already reach such a problem or have an idea where it may
come from ?
Thanks in advance
Manuel Selva
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No i am not dealing at all with SWT DND.
Is the test previously described (consisting of adding system.out to
lighweightsystem event handler) proves that the bug is not in my code ?
Thanks
Manuel
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In fact i have one panel containing about 30 rectanglefigure which one
ccan contains 2000-3000 other figures (Rectangle, Polygon ...)