switching focus for keyboard input in a GUIDE created function

I want to create a slider, after which you use it, a push button appears. However, instead of clicking the button, I want to enable the user to simply push a button on the keyboard with the same effect as pushing the pushbutton. The problem, I encounter, is that the pushbutton is not in the focus. There have been some answers out there, how to do it within the uicontrol environment. I want to know, how to do it within the GUI environment. Here is a sample code:

function varargout = movedslider(varargin)

gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @movedslider_OpeningFcn, ...
                   'gui_OutputFcn',  @movedslider_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end

function movedslider_OpeningFcn(hObject, eventdata, handles, varargin)

handles.output = hObject;

guidata(hObject, handles);

function varargout = movedslider_OutputFcn(hObject, eventdata, handles) 

varargout{1} = handles.output;

function slider1_Callback(hObject, eventdata, handles)
global v1 v2
v1=get(handles.slider1, 'value')
if v1~=v2
    set(handles.pushbutton1,'visible','on')
end

function slider1_CreateFcn(hObject, eventdata, handles)

if isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor',[.9 .9 .9]);
end

function pushbutton1_Callback(hObject, eventdata, handles)
global v2 v1
v2=v1;
set(handles.pushbutton1,'visible','off');

function movedslider_WindowKeyPressFcn(hObject, eventdata, handles)
 keyPressed = eventdata.Key;
 if strcmpi(keyPressed,'x')
     uicontrol(handles.pushbutton1);
     pushbutton1_Callback(handles.pushbutton1,[],handles);
 end

What do I have to change, in order to have the pushbutton1 effect while pushing 'x' on the keyboard?

Thanks! Jan

[Jan]

Please format your question properly. See the "? Help" button to learn how to post text and code in a readable form. Thanks.

Answer 1

[Geoff Hayes]

Jan Meyer - make sure that the WindowKeyPressFcn property of the figure has been assigned correctly for your GUI. Using GUIDE, launch the Property Inspector for the figure, and verify that the WindowKeyPressFcn property is set to

 @(hObject,eventdata)movedslider('figure1_WindowKeyPressFcn',hObject,eventdata,guidata(hObject))

where the callback (in your code) will then be

 function figure1_WindowKeyPressFcn(hObject, eventdata, handles)
 % hObject    handle to figure1 (see GCBO)
 % eventdata  structure with the following fields (see FIGURE)
 %  Key: name of the key that was pressed, in lower case
 %  Character: character interpretation of the key(s) that was pressed
 %  Modifier: name(s) of the modifier key(s) (i.e., control, shift) pressed
 % handles    structure with handles and user data (see GUIDATA)

 keyPressed = eventdata.Key;
 if strcmpi(keyPressed,'x')
     uicontrol(handles.pushbutton1);
     pushbutton1_Callback(handles.pushbutton1,[],handles);
 end

This is slightly different from what you have where the WindowKeyPressFcn is prefixed with the name of the GUI. With the above, I was able to get the pushbutton callback to fire when I pressed the x key.

[Jan Meyer]

Thank you, it works now!