GUI for keyboard pressed representing the push button
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Hi,
Does it any way to represent the keyboard pressed for the callback of pushbutton? For example, when 'A' in computer keyboard is pressed, MATLAB GUI for pushbutton1 will be triggered automatically and do the corresponding callback. When 'B' from keyboard is pressed, then GUI will do the callback for pushbutton2.
This is especially want to develop for the blind people so that they can control the GUI by keyboard without the help of computer mouse.
Hope there is some suggestion and example of coding. Thank you.
2 件のコメント
Amir Mohammad Alizadeh
2023 年 1 月 3 日
What I am trying to do is opposite of that, I want to associate a button push in GUI with "esc" key. Any suggestions please? Thank you
Walter Roberson
2023 年 1 月 4 日
You can modify the escape key detection routine to directly call the callback function you would like associated with the button push. Or, alternately, you could modify the escape key detection routine to use the Java "Robot" class to simulate a button push.
採用された回答
Matt Fig
2011 年 2 月 16 日
Yes. Simply put the callbacks for the correct pushbuttons in the keypressfcn of the figure. You may need an enormous switchyard if you have one button for each key on the keyboard.
function [] = fig_keypressfcn(varargin)
% The keypressfcn for the figure.
switch varargin{2}.Key
case 'a'
case 'b'
...
その他の回答 (4 件)
Jiro Doke
2011 年 2 月 17 日
I assume you are using GUIDE to create your GUI. In that case, create a WindowKeyPressFcn for the figure (the figure is the main GUI window). Right click on the background of your GUI in GUIDE, and there should be a "WindowKeyPressFcn" callback for that. Then in the callback code, use switch statement to deal with different key presses:
function figure1_WindowKeyPressFcn(hObject, eventdata, handles)
switch eventdata.Key
case 'a'
<callback function corresponding to "a">
case 'b'
<callback function corresponding to "b">
...
end
4 件のコメント
Oleg Komarov
2011 年 2 月 16 日
A simple example which uses KeyPressFcn:
function [] = gui()
S.fh = figure('units','pixels',...
'position',[500 200 200 100],...
'menubar','none',...
'name','gui',...
'numbertitle','off',...
'resize','off');
S.pb = uicontrol('style','push',...
'units','pix',...
'position',[10 10 180 40],...
'fontsize',14,...
'string','Hi!');
S.tx = uicontrol('style','text',...
'units','pix',...
'position',[10 55 180 40],...
'string','goodbye',...
'fontsize',23);
set(S.pb,'callback' ,{@pb_call,S})
% Check if 'p' is pressed when focus on button and exec callback
set(S.pb,'KeyPressFcn',{@pb_kpf ,S});
% Check if 'p' is pressed when focus on figure and exec callback
set(S.fh,'KeyPressFcn',{@pb_kpf ,S});
% Callback for pushbutton, prints Hi! in cmd window
function pb_call(varargin)
S = varargin{3}; % Get the structure.
set(S.tx,'String', get(S.pb,'String'))
% Do same action as button when pressed 'p'
function pb_kpf(varargin)
if varargin{1,2}.Character == 'p'
pb_call(varargin{:})
end
Oleg
3 件のコメント
Oleg Komarov
2011 年 2 月 17 日
I'm not trying to position the mouse. I'm using the KeyPressFcn callback.
I modified the code above to update a statis text box. Try to run it.
Jonathan
2011 年 9 月 22 日
I got a question here if I want to do a case where I press 'CTRL+a' how do I write it in the case?
1 件のコメント
Walter Roberson
2011 年 9 月 22 日
You need to check that strcmp(eventdata.Modifier,'control') is true. That cannot be done directly in the case label for 'a' but it can be done within the body... or you could test the modifier before the switch and use different switch trees for the different modifiers.
SN MJTHD
2014 年 7 月 16 日
Dear Matlab Experts
I am doing a similar work but there is a difference. For the moment, I`m using two Push Buttons in my GUI with names LEFT and RIGHT. but I have Three Conditions like Left, Right and NoResponse. NoResponse means non of Left or Right Push Buttons are pushed.
Now I`m trying to use both keyboard and push buttons for my purpose. For example "S" key as Left Push Button and "L" key as Right Push Button and if non of them are pushed NoResponse be done.
I tried many ways but I encountered different errors.
I appreciate any help.
0 件のコメント
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