Looking to get mouse position feedback interactively over a plot and send to text boxes in GUI

I have a figure in a GUI that is a map (lat/lon). I want to send that lat/long to 2 text boxes in the GUI as the mouse goes over the map interactively and then capture the final coordinate with a mouse click (using ginput). Here is part of my code...

function load_map_Callback(hObject, eventdata, handles)
% hObject    handle to load_map (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

   plotMapDTED_copper_gui(map,'deg',handles.axes1);

      if(get(handles.option_mouse_click_linear,'Value'))
          datacursormode on
          %Enter target location
          message = sprintf('Select the location on the map as the Target:\n\nClick OK to continue.\nClick Exit to exit this function');
          button = questdlg(message, 'Enter Target', 'OK', 'Exit','OK');

          drawnow; % Refresh screen to get rid of dialog box remnants.

          if strcmpi(button, 'Exit')
              reset2default(handles);
              return;
          end
          if LocalMouseOverMap (hObject, handles)
           set(hObject,'Pointer','crosshair');
            cp = get(hObject,'CurrentPoint');
            xxxx=cp(1,1);
            yyyy=cp(1,2);

           set(handles.text19,'string',num2str(xxxx,'%.3f'));
           set(handles.text21,'string',num2str(yyyy,'%.3f'));

          [xt yt] = ginput(1);
          end
          scatter(xt, yt,'MarkerFaceColor',[0 0 1],'Marker','*');

then at the end I had this call

function status = LocalMouseOverMap (hObject, handles)

% get the current mouse position
cp = get(hObject,'CurrentPoint');

% Get the position of the map axes in pixels
set(handles.axes1,'units','pixels');
pos = get(handles.axes1,'position');
set(handles.axes1,'units','normalized');

% Determine if the mouse position is with the axes boundaries
if (cp(1) > pos(1) && cp(1) < pos(1) + pos(3) ...
    && cp(2) > pos(2) && cp(2) < pos(2) + pos(4))
  status = true;
else
  status = false;
end

[Walter Roberson]

your code does not look unreasonable at first glance. Are you encountering a specific problem?

Answer 1

[william gilliland]

Yes - I a getting an error that states that I cannot access "CurrentPoint" with this uicontrol. Now I know the figure has a propoerty - "CurrentPoint" but I don't know why I can't get to it.

Answer 2

[Robert Cumming]

Check what hObject actually is - I suspect its not the figure handle - and hence doesn't have the property "CurrentPoint".

If hObject is a child of figure (I would have thought so), you can get to the figure by going up through its parent.

e.g.

h = figure;
child = uicontrol ( 'parent', h, 'style', 'edit' )
get ( get ( child, 'parent' ), 'CurrentPoint' )

[Walter Roberson]

Or better than assuming you know the nesting level, use

get(ancestor(hObject,'figure'),'CurrentPoint')

[Robert Cumming]

Very good.

you learn something new everyday....