[Interest] Press and hold keyboard key to bring up menu in QML

Elvis Stansvik elvstone at gmail.com
Fri Apr 1 14:33:29 CEST 2016

2016-04-01 12:45 GMT+02:00 Elvis Stansvik <elvstone at gmail.com>:
> Hi folks,
> I have a full screen, page based Qt Quick 2 application. Input is
> contstrained by the hardware to the Left/Right/Return keyboard keys,
> so is quite limited, and navigation between pages is done using
> buttons on each page which handle return presses using (most of the
> time) Keys.onReturnPressed and navigation between buttons and other
> items with KeyNavigation.left/right.
> I now have the need to provide a special global shortcut: On almost
> all of the screens, holding the Enter key for 3 seconds should bring
> the user immediately to a sort of start screen, where he/she can
> choose to go into Settings or Power Off. Kind of like how holding the
> power button on a phone often brings up a power off/flight mode menu.
> I'm struggling to find a good way to handle this centrally: since
> Enter presses are normally accepted (swallowed) by my various buttons
> and other input items on the pages, where can I put some central key
> press/release handler in which to start/stop a timer (to determine if
> it was a long 3 sec press or not)?
> My pages are FocusScopes stuffed in a StackView inside a Window.
> Many thanks for any advice. Has noone had this kind of requirement
> before? (Global "hold key" shortcut).

Actually, scratch this. Our input device is a pushable wheel, and I've
realized now that we better re-program the Arduino we have hooked up
to it to have the logic to determine "long" vs "short" presses there
instead, and deliver these as distinct keypresses.


> Elvis

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