How to tell how an uieditfield was exited?
3 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
David Aronstein
el 7 de Feb. de 2020
Comentada: David Aronstein
el 26 de En. de 2021
I have a uieditfield field for text input.
There seem to be at least three ways to indicate to the app that we are finished entering information into this field. The ValueChangedFcn is called when (1) the user presses Enter, (2) the user presses Tab, or (3) the user changes from the app to another program running on the computer.
Is there a way to figure out which of these three events occured? In particular, I'd like to catch (3) and ignore processing the current value of the field for the moment.
0 comentarios
Respuesta aceptada
Antonio Hortal
el 24 de En. de 2021
Editada: Antonio Hortal
el 24 de En. de 2021
I might be wrong, but you could try getting the CurrentKey property of the figure
function editFieldValueChangedCallback(src,evt)
fig = ancestor(src,'figure');
switch get(fig,'CurrentKey')
case 'return'
disp('enter was pressed!')
otherwise
disp('the user changed focus!')
end
3 comentarios
Antonio Hortal
el 25 de En. de 2021
Hmmm I am using 2020b.. maybe in 2019a the CurrentKey property of the uifigure was not fully supported.
I am using this simple code btw
f = uifigure();
ef = uieditfield(f, 'ValueChangedFcn', @(src,evt) valueChangedCallback(src,evt));
function valueChangedCallback(src,~)
% Find the figure and get the last key pressed when the ValueChangedFcn is triggered
f = ancestor(src,'figure');
key = get(f,'CurrentKey');
switch key
case 'return'
disp('User pressed enter')
otherwise
disp('User changed focus')
end
end
Maybe CurrentCharacter works in 2019a? (Im a bit lazy to check release notes haha)
function valueChangedCallback(src,~)
f = ancestor(src,'figure');
key = get(f,'CurrentCharacter');
switch key
case {char(10),char(13)} % char(10) for windows and (13) for macs I think
disp('User pressed enter')
otherwise
disp('User changed focus')
end
end
If not, you could still attach a WindowKeyPressFcn callback to the uifigure. Both ValueChangedFcn and WindowKeyPressFcn will trigger when you press enter, and you just have to think on some code something so that the 2 callbacks exchange info.
I hope this helps :)
Más respuestas (1)
Bhargavi Maganuru
el 18 de Feb. de 2020
After typing in the edit field, if you click anywhere outside the edit field, editFieldValueChanged callback will be triggered.
Add the following line of code in the callback function.
disp("exited from editfield");
So whenever this message is displayed, user has clicked outside the app.
Hope this helps!
3 comentarios
Bhargavi Maganuru
el 19 de Feb. de 2020
HI David,
As of now there is no programmatic way to tell which of the events has triggered the callback.
Ver también
Categorías
Más información sobre Interactive Control and Callbacks en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!