Adjusting Edit Menu items

Bob Sneidar bobs at twft.com
Mon May 14 12:56:26 EDT 2012


Actually, I was not aware you could disable system menu items. It may be that LC is greying out the items, but still handling the hot keys. I suppose there ought to be a way to prevent copying content in LC as a security precaution, say for copyrighted material as an example. 

Bob


On May 14, 2012, at 9:31 AM, Peter Haworth wrote:

> Thanks Jacque.  Yes, there was no perceptible performance hit by processing
> all menus so all OK there.
> 
> I agree that the shortcut keys should be enabled/disabled in parallel with
> their associated Edit menu items but I'm not seeing that behavior.
> 
> Here's what I did on a card with just one editable field.  I haven't
> written any code to handle the command key shortcuts.
> 
> - made sure the cursor was in the field and the field was empty
> - clicked the edit menu, everything was disabled
> - typed some data into the field
> - checked the Edit menu again - all still disabled
> - selected some text in the field and pressed command-C to copy
> - moved the cursor to a different place in the field and pressed command-V
> - the copied text was pasted into the field
> 
> This was in the IDE (with my application's menu bar enabled), LC 5.0, OS X
> 10.6.8.  I haven't tried it in a standalone yet
> 
> Am I missing something?
> 
> 
> Pete
> lcSQL Software <http://www.lcsql.com>
> 
> 
> 
> On Sun, May 13, 2012 at 6:53 PM, J. Landman Gay <jacque at hyperactivesw.com>wrote:
> 
>> On 5/13/12 4:39 PM, Peter Haworth wrote:
>> 
>> I discovered then that there's a problem with those group mouseDown
>>> handlers on a Mac - it's impossible to tell which menu was clicked because
>>> "target" and "me" both return the name of the menu group, not the menu
>>> that
>>> was clicked, so you end up adjusting menus when they don't need adjusting.
>>> To complicate matters more, on Windows, the target does return the menu
>>> button name.
>>> 
>> 
>> I just set everything. It's fast enough. I have one mousedown menu handler
>> that adjusts twenty or more items and it's fine. You could try it and see
>> how it goes.
>> 
>> Menu buttons on OS X don't receive messages, which is why you aren't
>> getting the info you want, and why the mousedown handler has to be in the
>> group.
>> 
>> 
>> If an Edit menu item is disabled, does it's Mac command key and Windows
>>> shortcut key equivalent still work?  If not, that would be an issue with
>>> this approach unless I watch for those keys as well as using a mouseDown
>>> handler.
>>> 
>> 
>> If a menu item is disabled, so is its command key. That seems reasonable
>> to me. The command keys are just shortcuts to the menu items and should
>> behave the same. You can work around it with a commandKeyDown handler in
>> the card or stack. That will always fire, but it can interfere with the
>> real menu shortcuts sometimes.
>> 
>> Another way to handle it is to re-enable menu items the user might need at
>> the end of a menupick handler. If the menus aren't pulled down, no one can
>> tell if the items are enabled or not and their command keys will always
>> work.
>> 
>> 
>> --
>> Jacqueline Landman Gay         |     jacque at hyperactivesw.com
>> HyperActive Software           |     http://www.hyperactivesw.com
>> 
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