Respond to the left mouse click button in GUI

Hi everyone,

I'm designing a GUI which having several editboxs (allow input), and a figure_axis(explanation figure corresponding to the clicked editbox). I want to it to display my assigned explanation figure when I click (left click) to editboxs. Is there any way to do this?

Thank you so much!

Answer 1

[Joseph Cheng]

there is a problem with what you're trying to accomplish. here is a quick demo you can run. copy and paste into a mfile called clicktest. Here you can see the text field on the lower right updates the X and Y location of a mouse click but doesn't update when you click on a GUI interface (button, either edit boxes, and even the text field).

function clicktest()
    fig = figure
    hax = axes('Units','pixels');
    surf(peaks)
    uicontrol('Style', 'pushbutton', 'String', 'Clear',...
        'Position', [20 20 50 20],...
        'Callback', 'surf(randi(5,49,49)*peaks)');        
% The pushbutton string callback
% calls a MATLAB function

      ustring = uicontrol('Style','text',...
          'Position',[400 45 120 20],...
          'String','clicked objectt')
      edit1= uicontrol('Style','edit',...
          'Position',[400 95 120 20],...
          'String','clicked object')
      edit2= uicontrol('Style','edit',...
          'Position',[400 115 120 20],...
          'String','clicked object')
       set(fig,'WindowButtonDownFcn',{@position,ustring});

end

function position(hobject,event,ustring)
C = get(hobject,'CurrentPoint');
set(ustring,'String',num2str(C));
end

I would go with a radio button group that you put next to each text box.

Answer 2

[Geoff Hayes]

It is possible to capture left-mouse button events around an edit box, but it is a little clumsy, and like Joseph indicated, it won't work if you click within the edit box, just around it.

 function captureMouseClick

    % create the figure
    h = figure;

    % create the edit widget
    edit1h = uicontrol('Style', 'edit',...
               'String', 'enter text here',...
               'Position', [20 340 100 50],...
               'ButtonDownFcn', @edit1ButtonDown); 

    % the callback to capture the mouse button down event for the edit widget
    function edit1ButtonDown(hObject,~)

        % get the last mouse click selection type within the figure
        seltype = get(h,'SelectionType');

        if strcmpi(seltype,'normal')
            fprintf('left mouse button pressed!\n');
        elseif strcmpi(seltype,'alt')
            fprintf('right mouse button pressed!\n');
        elseif strcmpi(seltype,'open')
            fprintf('double mouse click!\n');
        else
            fprintf('other - shift and mouse-click!\n');
        end
    end
end

Seems only to work if you are within a few pixels outside the border of the edit widget. Try it and see what happens!