Hi,
On 17/3/19 11:38 pm, katja wrote:
Mouseup is a bit of a maverick: you want to be alerted regardless of
mouse position, i.e. any canvas or even outside Pd's territory.
Otherwise one could easily get the equivalent of a dangling midinote.
Therefore, would it be reasonable to conceive a dedicated class
[mouseup], every instance of which would be informed about every
mouseup event once?
Agree, and Jean-Yves suggestion on the other thread does this but from
the Tk side which is not as useful as you need to have the user install
a UI plugin to make it work. If a widget had mouse sensing like the one
you describe elsewhere then you'd want it to universally receive mouseup.
Anyhow, the other mouse events (mousedown, coordinates) are so much
related to position that bundling these in a single class is useful,
be it in a widget or otherwise.
Yep and I think you've had a lot of experience with my exact use-case
here which is touchscreen-enabled Raspberry Pi.
My preferred design (please excuse me while I ungratefully conjure a
bunch of work for someone):
* Object just like cnv (hopefully just cnv).
* Has a checkbox for "report mouse events".
* When there is a mouse-down inside its rectangle it reports it with
(x, y).
* Once it has "grab" it outputs all mouse-move events with both (dx,
dy) and also (x, y).
* Once it has "grab" it catches the universal mouse-up event and
reports it with (x, y).
* (x, y) should be relative to the object's internal top-left
position, so it can tell where the mouse is relative to itself.
The global receiver ideas are great and I am sure would be useful to
others but for me personally at this time I can do that stuff with GUI
plugins so it is less important.
> Such a class could also be useful in connection
> with existing Pd GUIs, for example to turn a single-cell radiobutton
> into a momentary switch.
Exactly yes, with the [cnv] changes above you'd be able to build things
like piano rolls, touch-pads, ribbon controllers, min-max selectors and
probably many things we haven't thought of, as abstractions.
As you point out all of this would likely require modifying
widgetbehaviour, unless mouse-up can be special-cased into one object
like cnv.
Cheers,
Chris.
--
https://mccormick.cx/
Sign up to my newsletter to hear about tech I'm building.
https://mccormick.cx/subscribe
_______________________________________________
Pd-dev mailing list
[email protected]
https://lists.puredata.info/listinfo/pd-dev
