MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guia do Utilizador descarregar pdf (Página 343)

100

101

Ways to Manage Data in a GUIDE GUI

This section shows you h ow to use GUI data to initialize and maintain an

error counter by storing an error count in the edit text component’s

UserData

property.

1 Add the following code to the opening function to initialize the edit

text component’s

UserData property. This code initializes the data in a

structure to allow for other data that could be needed:

% INITIALIZE ERROR COUNT AND USE EDITTEXT1 OBJECT'S USERDATA TO STORE IT.

data.number_errors = 0;

set(handles.edittext1,'UserData',data)

Note Alternatively, you can add a CreateFcn callback for the edit text, and

initialize the error counter there.

2 Add the following s tatement to set the edit text value from the slider

callback:

set(handles.edittext1,'String',...

num2str(get(hObject,'Value')));

where hObject is the handle o f the slider.

3 Add the following lines of code to the edit text callback to set the slider

value from the edit text callback:

val = str2double(get(hObject,'Stri ng'));

% Determine whether val is a number between 0 and 1.

if isnumeric (val ) && length(val)==1 && ...

val >= get(handles.slider1,'Min ') && ...

val <= get(handles.slider1,'Max ')

set(handles.slider1,'Value',val);

else

% Retrieve and increment th e error count.

% Error count is in the edit text UserData ,

% so we already have its handle.

data = get(hObject,'UserData');

data.number_errors = data.numbe r_errors+1;

% Save the changes.

9-13

1 2 ... 338 339 340 341 342 343 344 345 346 347 348 ... 758 759

Comentários a estes Manuais

Sem comentários

MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guia do Utilizador Página 343

Comentários a estes Manuais

Manuais e produtos relacionados com Software MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE