Dynamically add edit boxes using uicontrol and how to get the reference

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.

Answer 1

[Titus Edelhofer]

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

[Karthik KJ]

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 Shub]

Put this line

handles.edit = zeros(1, str2num(get(handles.entryNos,'string')));

outside the for loop.

[Karthik KJ]

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 2

[Daniel Shub]

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.

[Karthik KJ]

Thank you Daniel