MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Especificaciones descargar pdf (Pagina 137)

Launching a Dialog to Confirm an Operation

5-13

•One numeric argument – launch the dialog and place it at the location

specified in a two-element vector.

•Four arguments – call the

Yes or No button callback with the usual

arguments (

h,eventdata,handles,varargin).

With each calling syntax, the M-file returns a string output argument

indicating the user response.

The M-file performs various operations, which are described in the following

sections:

•Launch the dialog

•Specify the location of the dialog

•Wait for user response

•Execute a callback

•The

Yes button and No button callbacks

Launch the Dialog

This section of the M-file launches the dialog if the number of input arguments

is zero or one numeric value. This involves:

•Checking for the correct number of input arguments (callbacks have 4

arguments).

•Using

openfig to load the FIG-file.

•Setting the figure color to the standard GUI color on the host system.

•Creating the

handles structure.

Note that the function returns one output argument,

answer, which is passed

to the

Close button callback.

function answer = modaldlg(varargin)

error(nargchk(0,4,nargin)) % function takes 0, 1, or 4 arguments

if nargin == 0 | isnumeric(varargin{1})

fig = openfig(mfilename,'reuse');

set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));

handles = guihandles(fig);

guidata(fig, handles);

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MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Especificaciones Pagina 137