Thanks.  I guess the point of having keyboard shortcuts in popup menus is just 
to display them to remind the user what they are.  At this point, I plan to 
follow the practice of having everything from the popups also in a main menu 
bar in every platform.  So really, the glitch failing to display a 
'#\backspace' shortcut in Linux is the serious one in terms of practicality.  

On Jan 22, 2020, at 5:42 PM, George Neuner wrote:

> On 1/22/2020 4:44 PM, James Platt wrote:
>> I'm working on some GUI code and I am seeing some glitches with keyboard 
>> shortcuts in popup menus.  I wonder if others are seeing the same things.
>> In Racket 7.5 on macOS 10.11.6 "El Captian":
>> Shortcuts defined in a menu-item% in a popup menu don't work unless the 
>> popup menu is displayed. In other words, you have to right click first and 
>> then the shortcut will work while the menu is open.  This isn't a big deal 
>> if you are working according to Apple's human interface guidelines because 
>> all items in popup menus are also supposed to be in the main menu bar [1].   
>> Still, it seems like this should work on it's own.
> It's pretty standard across platforms for popup windows (any kind) to become 
> inactive when they are hidden.  In most windowing systems it is possible to 
> override that behavior and keep a window active even when not shown, but I 
> haven't worked with Macs since MultiFinder so I can't guide you as to how to 
> do it there.
>> In Racket 7.5 on Linux Mint 19.1 (Racket installed with the Ubuntu PPA):
>> The shortcuts don't work at all, whether the popup is displayed or not.  
>> Also a keyboard shortcut defined with '#\backspace'  does not display in the 
>> popup.  This  is supposed to be ctl-backspace on Linux and Windows and 
>> command-delete on macOS.  The macOS version works but not the Linux version. 
>>  I haven't tested with Windows.
> This sounds like a bug.
>> James
>> [1] 
> George

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