Pushbutton activated by Enter(return) key

2012 10 31
3 个回答
回答已采纳
更新时间：2022 8 24
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0 个投票

Hi,
I would like to ask you why doesn't work when I call funtion pushbutton1_Callback inside pushbutton1_KeyPressFcn. I have besidde other things buttons where I want them to react to Enter key when user Tabs to it (+ ofcourse when user just click at it). I thought that the simplest way would be to call pushbutton1_Callback in pushbutton1_KeyPressFcn,but obviously not...how caan I do this feature ?
Thanks, Peter

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Jan
Jan 2012-10-31
Whenever you type "doesn't work" in the forum, it is a good idea to show the corresponding code and the error message. This would make suggestions for improvements much easier. A suggestion based on guessing, what you are doing, is usually very weak.
Petr
Petr 2012-11-1
编辑：Image Analyst 2012-11-1
I want my code to be simple like that...
function pushbutton1_Callback(hObject, eventdata, handles)
%lines of code etc.
function pushbutton1_KeyPressFcn(hObject, eventdata, handles)
pushbutton1_Callback
%just to call Callback because I it to have the same function
and it doesn't work...
??? Input argument "handles" is undefined.
Error in ==> location>pushbutton1_Callback at 297
PDco(1,1) = str2double(get(handles.Xaxis, 'String'));
Error in ==> location>pushbutton1_KeyPressFcn at 460
pushbutton1_Callback
Error in ==> gui_mainfcn at 96
feval(varargin{:});
Error in ==> location at 42
gui_mainfcn(gui_State, varargin{:});
Error in ==>
@(hObject,eventdata)location('pushbutton1_KeyPressFcn',hObject,eventdata,guidata(hObject))
??? Error while evaluating uicontrol KeyPressFcn
Image Analyst
Image Analyst 2012-11-1
编辑：Image Analyst 2012-11-1
Why do you not have handles? Are you using GUIDE or not? From the names of things it looks like you are. It looks like you didn't pay attention to my Answer.
Sean de Wolski
Sean de Wolski 2012-11-1
How are you running this GUI? Are you just double-clicking on the figure? You need to run the *.m file associated with the figure:
>>myGUI
Petr
Petr 2012-11-2
编辑：Petr 2012-11-2
Yes I'm useing GUIDE and I am running my program from *.m file...even when I use handles it show same error...
I dont get why error mentiones handles...I dont want to use that i want to call a Callback function from another function...
Image Analyst method is also a good idea, but it's doing the same think...
For example this in my codeworks perfectly....
function uipushtool4_ClickedCallback(hObject, eventdata, handles) % hObject handle to uipushtool4 (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)
pushbutton2_Callback

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Petr
Petr 2012-11-7

1 个投票

Solution was simple and enough elegant for me...
.
function pushbutton1_KeyPressFcn(hObject, eventdata, handles)
key = get(gcf,'CurrentKey');
if(strcmp (key , 'return'))
pushbutton1_Callback(hObject, eventdata, handles)
end
function pushbutton1_Callback(hObject, eventdata, handles)
%code to be executed

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Maybe this one could be a good option too:
%bhok is the handles of your pushbutton.
%xxx represents any data for ur code.
bhok.Callback=@(src,~)okcbd(src,xxx);
bhok.KeyPressFcn=@(src,event)bhokcall(src,event,xxx);
function bhokcall(src,event,xxx)
if event.Key=='return' %#ok<BDSCA>
okcbd(src,xxx)
end
end
function okcbd(src,xxx)
%code to be executed
end

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更多回答（2 个）

Sean de Wolski
Sean de Wolski 2012-10-31

1 个投票

You can do this, you just need to feed it the correct inputs. You could probably find these by looking in the property inspector in GUIDE at the callback to see what GUIDE is feeding it.
Image Analyst
Image Analyst 2012-11-1

0 个投票

Just put the inside of the click callback into its own function, like Button1Pressed() or something like that.
function handles=Button1Pressed(handles)
% whatever it does....
Then have the click and keypress callbacks both call Button1Pressed(). You don't need to pass in anything other than handles.

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