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Why is saveState(IMemento) in IViewPart only called on shutdown? [message #302181]

Fri, 14 April 2006 15:47

Eclipse User

Originally posted by: eclipse.bettsockentraeger.de

Hello,

I created a view and saved its state in the saveState(IMemento) method
of IViewPart. The method is called upon workbench shutdown and
everything works beautifully but when I close the view manually the
method is not called and the state is not saved and can't be restored
upon startup or creation of the view.

SO how can I call the method on closeing of my view so that the state is
preserved?

Thanks for any help

Regards
Stefan

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #302193 is a reply to message #302181]

Sat, 15 April 2006 19:01

Darin Swanson

Messages: 2386
Registered: July 2009

Senior Member

You need to wire it up yourself....we logged a bug report about this some
time ago...I forget the state of it.

See the Debug Display for an example within Eclipse.
Especially
org.eclipse.jdt.internal.debug.ui.display.DisplayView#perspe ctiveChanged

HTH
Darins

"Stefan Langer" <eclipse@bettsockentraeger.de> wrote in message
news:e1og2t$lig$1@utils.eclipse.org...
> Hello,
>
> I created a view and saved its state in the saveState(IMemento) method of
> IViewPart. The method is called upon workbench shutdown and everything
> works beautifully but when I close the view manually the method is not
> called and the state is not saved and can't be restored upon startup or
> creation of the view.
>
> SO how can I call the method on closeing of my view so that the state is
> preserved?
>
> Thanks for any help
>
> Regards
> Stefan

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #302215 is a reply to message #302181]

Mon, 17 April 2006 12:35

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

saveState(IMemento) is about saving view state across sessions. The
user shuts down eclipse, and the user expects to see his views when he
restarts eclipse. The workbench uses saveState(*)/restoreState(*) for that.

When a user closes a view, he deliberatly closed it. It's gone. When
the user shows the view again, it comes up in it's default state.

You have 2 options. Option 1 is to implement ISaveablePart, and when
the view is closed it will get its methods like isDirty() and doSave(*)
called. Of course if you mark your view as dirty, a little '*' appears
in the tab title in 3.2 :-)

Option 2 is to use DialogSettings to persist view information.

Save your view information in the plugin state location.

Later,
PW

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #306177 is a reply to message #302215]

Mon, 24 July 2006 19:18

Guru Nagarajan

Messages: 45
Registered: July 2009

Member

How do I use DialogSettings to persist view Information? Any pointers is
much appreciated.
Paul Webster wrote:
> saveState(IMemento) is about saving view state across sessions. The
> user shuts down eclipse, and the user expects to see his views when he
> restarts eclipse. The workbench uses saveState(*)/restoreState(*) for
> that.
>
> When a user closes a view, he deliberatly closed it. It's gone. When
> the user shows the view again, it comes up in it's default state.
>
>
> You have 2 options. Option 1 is to implement ISaveablePart, and when
> the view is closed it will get its methods like isDirty() and doSave(*)
> called. Of course if you mark your view as dirty, a little '*' appears
> in the tab title in 3.2 :-)
>
> Option 2 is to use DialogSettings to persist view information.
>
> Save your view information in the plugin state location.
>
> Later,
> PW

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #306181 is a reply to message #306177]

Mon, 24 July 2006 20:17

Paul Webster

Messages: 6859
Registered: July 2009
Location: Ottawa

Senior Member

You want to create your DialogSettings object, fill it with information,
and then save it ... there's a #save(Writer) method.

You can persist the DialogSettings file in your plugin state location
.... start from Plugin#getStateLocation().

Later,
PW

Paul Webster
http://wiki.eclipse.org/Platform_Command_Framework
http://wiki.eclipse.org/Command_Core_Expressions
http://wiki.eclipse.org/Menu_Contributions

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #306184 is a reply to message #306181]

Mon, 24 July 2006 21:43

Guru Nagarajan

Messages: 45
Registered: July 2009

Member

Paul Webster wrote:
> You want to create your DialogSettings object, fill it with information,
> and then save it ... there's a #save(Writer) method.
>
> You can persist the DialogSettings file in your plugin state location
> ... start from Plugin#getStateLocation().
>
> Later,
> PW
>
>
Thanks Paul. I would like to store Objects vs. Strings or primitives.

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #306226 is a reply to message #306184]

Tue, 25 July 2006 19:49

Konstantin Scheglov

Messages: 555
Registered: July 2009

Senior Member

Guru Nagarajan wrote:

> Thanks Paul. I would like to store Objects vs. Strings or primitives.

You can do this.
Serialize your objects into file located in Plugin#getStateLocation().

Konstantin Scheglov,
Google, Inc.

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Re: Why is saveState(IMemento) in IViewPart only called on shutdown? [message #306228 is a reply to message #306226]

Tue, 25 July 2006 20:49

Guru Nagarajan

Messages: 45
Registered: July 2009

Member

Konstantin Scheglov wrote:
> Guru Nagarajan wrote:
>
>> Thanks Paul. I would like to store Objects vs. Strings or primitives.
>
> You can do this.
> Serialize your objects into file located in Plugin#getStateLocation().
Do you have a sample for this.

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