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Change the location of a Figure in a different thread [message #50677]

Sun, 22 December 2002 15:44

Eclipse User

Originally posted by: truenoto.yahoo.com

In a GEF plugin that I am working on, I create a Pop up menu command in
which I spawn a thread and change the locations of all the figures in the
diagram.

I use the setLocation() function to change the location but I get and a
NullPointerException when I invoke my command.

Is it because I call setLocation() in a different thread? But I change the
setLocation() is implemented the same as the setLocation() of the
LogicSubPart of the Logic Editor. It basically fires a Property Change
event. So I don't know why this will cause a problem if I call setLocation
in a same thread or a different thread.

If I want to change the location in a different, what should I do?

I notice I can change the location thru the Property View. Is that done in a
different thread or the same thread?

Thanks for any help.

<<<< Complete Stack dump >>>>

java.lang.NullPointerException

at
org.eclipse.draw2d.DeferredUpdateManager.queueWork(DeferredU pdateManager.jav
a:100)

at
org.eclipse.draw2d.DeferredUpdateManager.addInvalidFigure(De ferredUpdateMana
ger.java:61)

at org.eclipse.draw2d.Figure.revalidate(Figure.java:1130)

at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)

at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)

at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)

at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)

at org.eclipse.draw2d.Figure.setConstraint(Figure.java:1241)

at
org.eclipse.gef.editparts.AbstractGraphicalEditPart.setLayou tConstraint(Abst
ractGraphicalEditPart.java:763)

at
org.eclipse.gef.examples.logicdesigner.edit.core.LogicEditPa rt.refreshVisual
s(LogicEditPart.java:204)

at
org.eclipse.gef.examples.logicdesigner.edit.UmlClassEditPart .refreshVisuals(
UmlClassEditPart.java:106)

at
org.eclipse.gef.examples.logicdesigner.edit.core.LogicEditPa rt.propertyChang
e(LogicEditPart.java:193)

at
java.beans.PropertyChangeSupport.firePropertyChange(Property ChangeSupport.ja
va:252)

at
org.eclipse.gef.examples.logicdesigner.model.core.LogicEleme nt.firePropertyC
hange(LogicElement.java:30)

at
org.eclipse.gef.examples.logicdesigner.model.core.LogicSubpa rt.setLocation(L
ogicSubpart.java:178)

at
org.eclipse.gef.examples.logicdesigner.autolayout.SpringLayo utGraph$1.graphL
ayoutUpdated(SpringLayoutGraph.java:51)

at
de.fzi.wim.guibase.graphview.graph.AbstractGraph.notifyLayou tUpdated(Abstrac
tGraph.java:43)

at
de.fzi.wim.guibase.graphview.layout.Layouter$LayouterThread. run(Layouter.jav
a:79)

Re: Change the location of a Figure in a different thread [message #50705 is a reply to message #50677]

Sun, 22 December 2002 17:26

Eclipse User

Originally posted by: truenoto.yahoo.com

The reason I spawn another thread to change the locations of all the figures
is I want to achieve some kind of animation effect. So I appreciate what can
I do to change the location of the figures in diagram in this new thread?

"Takumi Fujiwara" <truenoto@yahoo.com> wrote in message
news:au57n9$dj7$1@rogue.oti.com...
> In a GEF plugin that I am working on, I create a Pop up menu command in
> which I spawn a thread and change the locations of all the figures in the
> diagram.
>
> I use the setLocation() function to change the location but I get and a
> NullPointerException when I invoke my command.
>
> Is it because I call setLocation() in a different thread? But I change the
> setLocation() is implemented the same as the setLocation() of the
> LogicSubPart of the Logic Editor. It basically fires a Property Change
> event. So I don't know why this will cause a problem if I call setLocation
> in a same thread or a different thread.
>
> If I want to change the location in a different, what should I do?
>
> I notice I can change the location thru the Property View. Is that done in
a
> different thread or the same thread?
>
> Thanks for any help.
>
> <<<< Complete Stack dump >>>>
>
> java.lang.NullPointerException
>
> at
>
org.eclipse.draw2d.DeferredUpdateManager.queueWork(DeferredU pdateManager.jav
> a:100)
>
> at
>
org.eclipse.draw2d.DeferredUpdateManager.addInvalidFigure(De ferredUpdateMana
> ger.java:61)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1130)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.setConstraint(Figure.java:1241)
>
> at
>
org.eclipse.gef.editparts.AbstractGraphicalEditPart.setLayou tConstraint(Abst
> ractGraphicalEditPart.java:763)
>
> at
>
org.eclipse.gef.examples.logicdesigner.edit.core.LogicEditPa rt.refreshVisual
> s(LogicEditPart.java:204)
>
> at
>
org.eclipse.gef.examples.logicdesigner.edit.UmlClassEditPart .refreshVisuals(
> UmlClassEditPart.java:106)
>
> at
>
org.eclipse.gef.examples.logicdesigner.edit.core.LogicEditPa rt.propertyChang
> e(LogicEditPart.java:193)
>
> at
>
java.beans.PropertyChangeSupport.firePropertyChange(Property ChangeSupport.ja
> va:252)
>
> at
>
org.eclipse.gef.examples.logicdesigner.model.core.LogicEleme nt.firePropertyC
> hange(LogicElement.java:30)
>
> at
>
org.eclipse.gef.examples.logicdesigner.model.core.LogicSubpa rt.setLocation(L
> ogicSubpart.java:178)
>
> at
>
org.eclipse.gef.examples.logicdesigner.autolayout.SpringLayo utGraph$1.graphL
> ayoutUpdated(SpringLayoutGraph.java:51)
>
> at
>
de.fzi.wim.guibase.graphview.graph.AbstractGraph.notifyLayou tUpdated(Abstrac
> tGraph.java:43)
>
> at
>
de.fzi.wim.guibase.graphview.layout.Layouter$LayouterThread. run(Layouter.jav
> a:79)
>
>

Re: Change the location of a Figure in a different thread [message #50761 is a reply to message #50677]

Sun, 22 December 2002 22:26

Eclipse User

Originally posted by: hudsonr.us.eye-bee-em.com

You can animate without spawning a thread. When you have finished updating
the figures' bounds, call figure.getUpdateManager.performUpdate() to cause
an immediate repaint. Then move the figures and do this again, until the
animation is complete. This will block the UI, so the animation should be
brief.

The palette does exactly this. See AnimatableFigure

"Takumi Fujiwara" <truenoto@yahoo.com> wrote in message
news:au57n9$dj7$1@rogue.oti.com...
> In a GEF plugin that I am working on, I create a Pop up menu command in
> which I spawn a thread and change the locations of all the figures in the
> diagram.
>
> I use the setLocation() function to change the location but I get and a
> NullPointerException when I invoke my command.
>
> Is it because I call setLocation() in a different thread? But I change the
> setLocation() is implemented the same as the setLocation() of the
> LogicSubPart of the Logic Editor. It basically fires a Property Change
> event. So I don't know why this will cause a problem if I call setLocation
> in a same thread or a different thread.
>
> If I want to change the location in a different, what should I do?
>
> I notice I can change the location thru the Property View. Is that done in
a
> different thread or the same thread?
>
> Thanks for any help.
>
> <<<< Complete Stack dump >>>>
>
> java.lang.NullPointerException
>
> at
>
org.eclipse.draw2d.DeferredUpdateManager.queueWork(DeferredU pdateManager.jav
> a:100)
>
> at
>
org.eclipse.draw2d.DeferredUpdateManager.addInvalidFigure(De ferredUpdateMana
> ger.java:61)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1130)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.revalidate(Figure.java:1132)
>
> at org.eclipse.draw2d.Figure.setConstraint(Figure.java:1241)
>
> at
>
org.eclipse.gef.editparts.AbstractGraphicalEditPart.setLayou tConstraint(Abst
> ractGraphicalEditPart.java:763)
>
> at
>
org.eclipse.gef.examples.logicdesigner.edit.core.LogicEditPa rt.refreshVisual
> s(LogicEditPart.java:204)
>
> at
>
org.eclipse.gef.examples.logicdesigner.edit.UmlClassEditPart .refreshVisuals(
> UmlClassEditPart.java:106)
>
> at
>
org.eclipse.gef.examples.logicdesigner.edit.core.LogicEditPa rt.propertyChang
> e(LogicEditPart.java:193)
>
> at
>
java.beans.PropertyChangeSupport.firePropertyChange(Property ChangeSupport.ja
> va:252)
>
> at
>
org.eclipse.gef.examples.logicdesigner.model.core.LogicEleme nt.firePropertyC
> hange(LogicElement.java:30)
>
> at
>
org.eclipse.gef.examples.logicdesigner.model.core.LogicSubpa rt.setLocation(L
> ogicSubpart.java:178)
>
> at
>
org.eclipse.gef.examples.logicdesigner.autolayout.SpringLayo utGraph$1.graphL
> ayoutUpdated(SpringLayoutGraph.java:51)
>
> at
>
de.fzi.wim.guibase.graphview.graph.AbstractGraph.notifyLayou tUpdated(Abstrac
> tGraph.java:43)
>
> at
>
de.fzi.wim.guibase.graphview.layout.Layouter$LayouterThread. run(Layouter.jav
> a:79)
>
>

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