Creating Graphical User Interfaces

The Close Button Callback

The Close button callback performs the following steps:

• Determines the location of the confirmation dialog based on the current size and location of the GUI application figure.
• Calls the M-file that launches the confirmation dialog with an input argument that specifies the dialog location and an output argument that causes the callback to wait for the dialog to return the user response.
• Takes the appropriate action depending on the answer returned from dialog.

Here is the Close button callback:

function varargout = pushbutton1_Callback(h, eventdata, handles, varargin)
    pos_size = get(handles.figure1,'Position');
    dlg_pos = [pos_size(1)+pos_size(3)/5 pos_size(2)+pos_size(4)/5];
    user_response = modaldlg(dlg_pos);
    switch user_response
        case {'no','cancel'}
            return
        case 'yes'
            % Prepare to close GUI application figure
        %                  .
        %                  .
        %                  .
            delete(handles.figure1)
    end

Implementing the GUI

The Confirmation Dialog Application M-file