MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guide de l'utilisateur télécharger pdf (Page 484)

100

101

10 Examples of GUIDE GUIs

startbtn_Callback

startbtn_Callback calls timer start m ethod if the timer is not already

running:

if strcmp(get(h andl es.timer, 'Running' ), 'off')

start(handles.timer);

end

stopbtn_Callback

stopbtn_Callback calls the timer stop method if the timer is currently

running:

if strcmp(get(h andl es.timer, 'Running' ), 'on')

stop(handles.timer);

end

periodsldr_Callback

periodsldr_Callback is called each time you move the slider. It sets timer

period to the slider current value after removing unwanted precision:

% Read the slider value

period = get(handles.periodsldr ,'Value');

% Timers need the precision of periods to be greater than about

% 1 millisecond, so truncat e the value returne d by the slider

period = period - mod(perio d,.01);

% Set slider readout to sho w its value

set(handles.slidervalue,'String',nu m2str(period))

% If timer is on, stop it, reset the peri od, and start it again.

if strcmp(ge t(ha ndles.timer, 'Runni ng') , 'on')

stop(handles.timer);

set(handles.timer,'Period',period)

start(handles.timer)

else % If timer is stopped, reset its period only.

set(handles.timer,'Period',period)

end

The slider callback must stop the tim er to reset its period, because timer

objects do not allow their periods to vary while they are running.

10-110

1 2 ... 479 480 481 482 483 484 485 486 487 488 489 ... 758 759

Commentaires sur ces manuels

Pas de commentaire

MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guide de l'utilisateur Page 484

Commentaires sur ces manuels

Produits connexes et manuels pour Logiciel MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE