Dynamically add edit boxes using uicontrol and how to get the reference
Asked by Karthik KJ on 23 Apr 2012
Latest activity Commented on by Karthik KJ on 24 Apr 2012
Hi I am new to Matlab GUI, I would like to add edit boxes using uicontrol. Since the edit boxes are created during runtime, I could not use string property to get the values entered by the user.
The code I started with is
function pushbutton1_Callback(hObject, eventdata, handles) for i=1:10 uicontrol('Style', 'edit', 'Position', [150, 5 + (i-1)*25, 60, 22],... 'Callback', {@myCallback, i}); end
This will create 10 edit boxes when i click pushbutton1, now when i run the scrip. I will have 10 edit boxes.What i need here is, user will enter 10 entries into the editboxes and I need to save these 10 entries to the workspace when i click save pushbutton. How can i get this, I tried to get the handles, (text_handles(i)=gco) but no success.Please help me on this.
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2 Answers
Answer by Titus Edelhofer on 23 Apr 2012
Accepted answer
Hi,
- add the handle from the uicontrol to the handles structure:
handles.edit = zeros(1, 10);
handles.edit(i) = uicontrol('style', 'edit', ...);
guidata(hObject, handles)
- in the save callback you collect the entries:
entries = cell(1, 10);
for i=1:10
entries{i} = get(handles.edit(i), 'string');
end
Titus
3 Comments
Karthik KJ on 23 Apr 2012
Hi i done like this as you mentioned
function pushbutton1_Callback(hObject, eventdata, handles)
for i=1:str2num(get(handles.entryNos,'string'))
handles.edit = zeros(1, str2num(get(handles.entryNos,'string')));
handles.edit(i) = uicontrol('style', 'edit','Position', [10, 5 + (i-1)*25, 60, 22]);
guidata(hObject, handles)
end
function pushbutton3_Callback(hObject, eventdata, handles)
entries = cell(1, str2num(get(handles.entryNos,'string')));
for i=1:str2num(get(handles.entryNos,'string'))
entries{i} = get(handles.edit(i), 'string');
end
I am getting this error,
Error using ==> testuicontrol1('pushbutton3_Callback',gcbo,[],guidata(gcbo))
There is no 'string' property in the 'root' class.
Daniel on 23 Apr 2012
Put this line
handles.edit = zeros(1, str2num(get(handles.entryNos,'string')));
outside the for loop.
Karthik KJ on 24 Apr 2012
Hi I am creating the edit boxes as you mentioned and Now if the edit boxes reaches the limit of the gui figure then i would like to use the slider bar.So that I can have any number of edit boxes, which user can enter the inputs. How to incorporate slider with the creation of the edit boxes. Please help on this.
Answer by Daniel on 23 Apr 2012
You need to save the handles that are created by uicontrol into the gui handles object ...
handles.hEdit(i) = uicontrol( ...
Then you need to save the updated handles with setappdata. Then the callback for the save button should be able to get the handles for the edit boxes.
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