Randy Hudson a écrit :
Display.getCurrent().asyncExec(Runnable);
Manuel SELVA
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Subject
05/04/2007 03:21 [gef-dev] dispatchMouseRelease
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GEF development
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Hi all,
I posted this question in the forum without success so try to ask it
here (knowing that it is not the right place but ...).
I am dealing with Draw2d mouse events. In my Draw2d diagram when the
mouse is released on particular figures i want to dispose() my diagram.
To do this, in my MouseListener mouseReleased() method i dispose() the
canvas that contains the diagramm. This generates an SWT widget is
disposed exception since after my mouseReleased method has been called
the SWT Event dispatcher invokes the receive method that invokes
setHoverSource and try to access to (Control)me.getSource. Why the
dispatchMouseReleased() method calls receive()
mouseTarget.handleMouseReleased(currentEvent);
receive() <-------- This call generates the exception ?
How can i dispose my diagram composite inside a mouseReleased event ?
Thanks in advance
Manuel Selva
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Hi Randy and thanks for your answer,
It works, nethertheless i still have a question:
The Javadoc for asynch metho says " The caller of this method
continues Causes the run() method of the runnable to be invoked by the
user-interface thread at the next reasonable opportunity. The caller of
this method continues to run in parallel". It means, that in
general, we can't guaranty that the caller thread has reached a given
point when the run() method of runnable would be executed. I am right ?
Your solution seems to always works. Why ? In our case the caller
thread IS the UI thread, is it the reason why we can guaranty
that the dispatchMouseRelease method will be completely executed before
the run( ) method of the runnable will be called ?
Manuel Selva
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