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Re: [platform-ui-dev] Is enableWhen missing the e4 application model?
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It's exactly the opposite!!!!:
- activeWhen defines if a handler is active in a certain context (eg the
current active context is a Part)
- enabledWhen defines if a handler is enabled eg the current Part is dirty
Tom
On 10.02.16 19:51, Lars Vogel wrote:
> activeWhen is used to determine if a handler can be executed, e.g. the
> save command is only executable if there is something to save.
>
> enabledWhen is used to define if a handler is relevant. Similar to
> defining a handler for a part but more flexible, e.g., you can use core
> expressions to define this. Eclipse can only have one enabled handler at
> the same time.
>
> Am 10.02.2016 7:40 nachm. schrieb "Dirk Fauth" <dirk.fauth@xxxxxxxxx
> <mailto:dirk.fauth@xxxxxxxxx>>:
>
> Maybe a stupid question, but what is the difference between
> activeWhen and enabledWhen? Eclipse 3.x development is so long ago...
>
> On Wed, Feb 10, 2016 at 7:29 PM, Lars Vogel <lars.vogel@xxxxxxxxxxx
> <mailto:lars.vogel@xxxxxxxxxxx>> wrote:
>
> Ahhh... Wrong again, sounds like my mind is wired wrong.
>
> This one should be correct:
>
> @CanExecute is a replacement for enabledWhen
>
> activeWhen is missing, I think
>
> Am 10.02.2016 7:25 nachm. schrieb "Lars Vogel"
> <lars.vogel@xxxxxxxxxxx <mailto:lars.vogel@xxxxxxxxxxx>>:
>
> Sorry, last email was wrong.
>
> @CanExecute is an replacement for enabledWhen
>
> For activeWhen I'm not aware of a replacement
>
> Am 10.02.2016 7:23 nachm. schrieb "Dirk Fauth"
> <dirk.fauth@xxxxxxxxx <mailto:dirk.fauth@xxxxxxxxx>>:
>
> That was your question from the mail subject
>
> On Wed, Feb 10, 2016 at 7:13 PM, Lars Vogel
> <lars.vogel@xxxxxxxxxxx <mailto:lars.vogel@xxxxxxxxxxx>>
> wrote:
>
> @CanExecute is a replacement for enabledWhen
>
> Am 10.02.2016 7:09 nachm. schrieb "Dirk Fauth"
> <dirk.fauth@xxxxxxxxx <mailto:dirk.fauth@xxxxxxxxx>>:
>
> Hi,
>
> IIRC there is no activeWhen or enabledWhen
> because of the @CanExecute that can be used with
> e4 handlers.
>
> Greez,
> Dirk
>
> On Wed, Feb 10, 2016 at 6:32 PM, Lars Vogel
> <lars.vogel@xxxxxxxxxxx
> <mailto:lars.vogel@xxxxxxxxxxx>> wrote:
>
> Hi,
>
> I was planning to convert existing e3 IDE
> handler implementations to
> e4 for Eclipse 4.6. This should be pretty
> straight forward, as most of
> our handlers are internal API and you can
> define e4 handler for e3
> commands because of our amazing Eclipse e4
> implementation.
>
> But basically every interesting handler
> implementation I looked at,
> was using an activeWhen expression and AFAIK
> we do not support this in
> e4.
>
> Is anyone aware why this is missing? Or do
> we have a workaround? I
> know we have the content hierarchy but this
> does not allow to define a
> active handler for example based on the
> selected type.
>
> Best regards, Lars
>
> P.S. I'm not posting this to the e4 mailing
> list, as the e4
> application model has been migrated a long
> time ago to platform UI.
>
>
> --
> Eclipse Platform UI and e4 project co-lead
> CEO vogella GmbH
>
> Haindaalwisch 17a, 22395 Hamburg
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