How to show a check mark for a dynamically generated menu item?
Hello, I am generating a menu dynamically in the #onAboutToDisplayMenu: method and would like to add check mark to certain menu items. The problem is that the #queryCommand: method of my shell is only called for the menu name itself, but not for each menu item. (See below for my coding in those two methods). How can I enable check marks for the menu items? Bernhard queryCommand: aCommandQuery (aCommandQuery command == #drives) ifTrue: [ aCommandQuery isEnabled: true. ^true. ]. self halt. (aCommandQuery command == #toggleDriveMonitoring: ) ifTrue: [ aCommandQuery checked: true. ^true ]. super queryCommand: aCommandQuery MyShell>>onAboutToDisplayMenu: aMenu super onAboutToDisplayMenu: aMenu. aMenu name == #drives ifTrue: [ aMenu clear. File drives do: [ :eachDrive | (aMenu addCommand: (MessageSend receiver: self selector: #toggleDriveMonitoring: argument: eachDrive ) description: eachDrive). ] ]. -- (This email address is only temporarily valid, due to the heavy amount of spam a post generates. For a permanently valid email address, just remove all numerical digits from the address.)
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Bernhard
1/2/2004 4:46:45 AM
comp.lang.smalltalk.dolphin
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Bernhard Kohlhaas wrote:
> (aCommandQuery command == #toggleDriveMonitoring: )
> ifTrue: [ aCommandQuery checked: true. ^true ].
Try:
(aCommandQuery command asSymbol == #toggleDriveMonitoring: )
the result of #command is the MessageSend you created in the menu creation
code.
-- chris
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Chris
1/2/2004 11:13:57 AM
Chris, the breakpoint before this statement isn't even reached, so the queryCommand: method isn't invoked at all. Bernhard Chris Uppal wrote: > Bernhard Kohlhaas wrote: > > >>(aCommandQuery command == #toggleDriveMonitoring: ) >>ifTrue: [ aCommandQuery checked: true. ^true ]. > > > Try: > > (aCommandQuery command asSymbol == #toggleDriveMonitoring: ) > > the result of #command is the MessageSend you created in the menu creation > code. > > -- chris > > -- (This email address is only temporarily valid, due to the heavy amount of spam a post generates. For a permanently valid email address, just remove all numerical digits from the address.)
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Bernhard
1/2/2004 11:46:29 AM
I wrote:
> (aCommandQuery command asSymbol == #toggleDriveMonitoring: )
I forgot to mention that CommandQuery>>command can sometimes answer nil. It's
sporadic, and I've never been able to find a reproducible example, so I don't
know whether it's actually a bug or a feature. I just put an early #isNil test
into #queryCommand: implementations where I'm using #asSymbol.
-- chris
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Chris
1/2/2004 11:46:44 AM
Bernhard,
>
> the breakpoint before this statement isn't even reached, so the
> queryCommand: method isn't invoked at all.
Ah, right.
I think that may be because you are using a MessageSend rather than a Message.
Since MessageSends "know" what their receiver is, the command framework will
try their #queryCommand: before that of the Presenter, and I suspect (without
having worked out the details) that that is what's going wrong for you.
If you use a Message, then the framework will still assume that the intended
receiver of the command is the MVP component and will use your Presenter's
#queryCommand.
-- chris
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Chris
1/2/2004 12:00:02 PM
Chris, > I forgot to mention that CommandQuery>>command can sometimes answer > nil. It's sporadic, and I've never been able to find a reproducible > example, so I don't know whether it's actually a bug or a feature. I > just put an early #isNil test into #queryCommand: implementations > where I'm using #asSymbol. Just FYI, CommandQuery>>commandSymbol automatically does a nil check for you. -- Ian Use the Reply-To address to contact me. Mail sent to the From address is ignored.
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Ian
1/2/2004 5:43:20 PM
That was indeed the problem. It works now with a Message instead of a MessageSend. Thanks so much, Bernhard Chris Uppal wrote: > Bernhard, > >>the breakpoint before this statement isn't even reached, so the >>queryCommand: method isn't invoked at all. > > > Ah, right. > > I think that may be because you are using a MessageSend rather than a Message. > > Since MessageSends "know" what their receiver is, the command framework will > try their #queryCommand: before that of the Presenter, and I suspect (without > having worked out the details) that that is what's going wrong for you. > > If you use a Message, then the framework will still assume that the intended > receiver of the command is the MVP component and will use your Presenter's > #queryCommand. > > -- chris > > > -- (This email address is only temporarily valid, due to the heavy amount of spam a post generates. For a permanently valid email address, just remove all numerical digits from the address.)
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Bernhard
1/2/2004 9:43:00 PM
Ian,
> Just FYI, CommandQuery>>commandSymbol automatically does a nil check for
> you.
Useful. Thank you.
-- chris
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Chris
1/3/2004 10:22:15 AM
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