Thread Subject: Creating uicontextmenu for copying data to clipboard

Hello everyone,

I want to create a uicontextmenu in a gui for copying a
selected lisbox element to clipboard. My code is the
following:

%define context menu
cmenu = uicontextmenu;
%set context menu for listbox element
set(hObject,'UIContextMenu',cmenu);
cb1 = ['copy_selected(hObject)'];
% Define the context menu items
item1 = uimenu(cmenu, 'Label', 'copy', 'Callback', cb1);

The function copy_selected looks like this:

function copy_selected(handles.listbox1)

value = get(handles.listbox1, 'Value');
measurement = get(handles.listbox1,'Sring');
data = measurement{value(1)};
clipboard('copy', data);

I get an error message saying 'undefined Object hObject'.
So my question is how can I pass variables along with the
callback function for the contextmenu?

Thanks for helping,
Rudi.

"Johannes Ruhhammer" <RudiRocker@gmx.net> wrote in message
<fm23th$lqe$1@fred.mathworks.com>...
> Hello everyone,
>
> I want to create a uicontextmenu in a gui for copying a
> selected lisbox element to clipboard. My code is the
> following:
>
> %define context menu
> cmenu = uicontextmenu;
> %set context menu for listbox element
> set(hObject,'UIContextMenu',cmenu);
> cb1 = ['copy_selected(hObject)'];
> % Define the context menu items
> item1 = uimenu(cmenu, 'Label', 'copy', 'Callback', cb1);
>
> The function copy_selected looks like this:
>
> function copy_selected(handles.listbox1)
>
> value = get(handles.listbox1, 'Value');
> measurement = get(handles.listbox1,'Sring');
> data = measurement{value(1)};
> clipboard('copy', data);
>
> I get an error message saying 'undefined Object hObject'.
> So my question is how can I pass variables along with the
> callback function for the contextmenu?
>
> Thanks for helping,
> Rudi.

The error is caused by the header of the function
copy_selected. This function could be as following

function copy_selected(varargin)
hdl = gco;
valfld = get(hdl, 'Value');
strfld = get(hdl,'String');

switch get(hdl,'style')
    case {'listbox' , 'popupmenu'}
        data = strfld{valfld};
    case {'edit', 'text'}
        data = strfld;
    otherwise
        data = valfld;
end
clipboard('copy', data);


Moreover, cb1 needs to be changed.

%define context menu
cmenu = uicontextmenu;

%set context menu for listbox element
%set(hObject,'UIContextMenu',cmenu); %hObject is your listbox
set(handle.listbox1,'UIContextMenu',cmenu);

% Define the context menu items
item1 = uimenu(cmenu, 'Label', 'copy',
'Callback',@copy_selected);


Anh Huy Phan
RIKEN - BSI
   

Thanks for your help. Everything is now working fine but
cb1 hasn't to be changed because I wrote all in the create
function of the listbox element. So here's my final code:

In the listbox create function:

%define context menu
cmenu = uicontextmenu;
%set context menu for listbox element
set(hObject,'UIContextMenu',cmenu);
% Define the context menu items
item1 = uimenu(cmenu, 'Label', 'copy
selected', 'Callback',@copy_selected);

In copy_selected:
function copy_selected(varargin)
hdl = gco;
valfld = get(hdl, 'Value');
strfld = get(hdl,'String');
data = strfld{valfld};
clipboard('copy', data);

Greetings,
Rudi.

"Johannes " <RudiRocker@gmx.net> wrote in message
<fm2egq$k1a$1@fred.mathworks.com>...
> Thanks for your help. Everything is now working fine but
> cb1 hasn't to be changed because I wrote all in the create
> function of the listbox element. So here's my final code:
>
> In the listbox create function:
>
> %define context menu
> cmenu = uicontextmenu;
> %set context menu for listbox element
> set(hObject,'UIContextMenu',cmenu);
> % Define the context menu items
> item1 = uimenu(cmenu, 'Label', 'copy
> selected', 'Callback',@copy_selected);
>
> In copy_selected:
> function copy_selected(varargin)
> hdl = gco;
> valfld = get(hdl, 'Value');
> strfld = get(hdl,'String');
> data = strfld{valfld};
> clipboard('copy', data);
>
> Greetings,
> Rudi.
>

Right Click on one item of your listbox, and select the
context menu 'copy selected'.

The selected item will be copied to SYSTEM Clipboard.
For checking, you put the console in the command window, and
press CTRL+V, your selected data will be pasted from the
clipboard

or type this command

    clipboard('paste')

Or you can test this function by the following code

figure;
cmenu = uicontextmenu;
item1 = uimenu(cmenu, 'Label', 'copy',
'Callback',@copy_selected);
obj =
uicontrol('style','listbox','string',char(65+(0:5)'),...
    'units','normalized','position',[.1 .1 .3 .5]);
set(obj,'UIContextMenu',cmenu);

By the way, because listbox allows multiselect mode, in this
case, you should convert data variable (cell) to a string by
mat2str or sprintf, cellfun

Anh Huy Phan
RIKEN - BSI