Eclipse Community Forums: Rich Client Platform (RCP) » ISelectionChangedListener to find the previous selection

Help

Home

Home » Eclipse Projects » Rich Client Platform (RCP) » ISelectionChangedListener to find the previous selection

Show: Today's Messages :: Show Polls :: Message Navigator

ISelectionChangedListener to find the previous selection [message #893987]

Fri, 06 July 2012 10:47

Jason Lin

Messages: 12
Registered: July 2012

Junior Member

Hello,
I add an ISelectionChangedListener in order to know the selection change.
Meanwhile, I want to know the previous selection except current selection.
How can I get it?
My stupid solution is keeping current selection each time we select. But I think it tastes bad...

Any idea? Such as other listeners I should use instead.

Thanks in advance.

Best Regards,
Jason

Report message to a moderator

Re: ISelectionChangedListener to find the previous selection [message #894006 is a reply to message #893987]

Fri, 06 July 2012 11:40

Daniel KrÃ¼gler

Messages: 853
Registered: July 2009

Senior Member

On 2012-07-06 12:47, Qinhe Lin wrote:
> Hello,
> I add an ISelectionChangedListener in order to know the selection
> change. Meanwhile, I want to know the previous selection except
> current selection. How can I get it? My stupid solution is keeping
> current selection each time we select. But I think it tastes bad...
>
> Any idea? Such as other listeners I should use instead.
> Thanks in advance.

IMO your current approach is the best what you can do. There does not
exist a concept of a selection-history nor one of the "previous
selection". I also don't think that these concepts have to be part of a
general selection provider, in other words: I don't think that the lack
of these concepts is a defect.

HTH & Greetings from Bremen,

Daniel Krügler

Report message to a moderator