MATLAB SIMULINK 7 - GRAPHICAL USER INTERFACE Guia do Utilizador descarregar pdf (Página 656)

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101

14 Manage Ca llback Executio n

3 KeyPressFcn (uicontrol and uitable callback)

4 KeyReleaseFc n (in f ig ure window only)

5 WindowKeyRel ease Fcn (in figure window or any of its child objects)

How the Interruptible Property Works

Youcansetanobject’sInterruptible property to either on (the default) or

off.

If the

Interruptible property of the object whose callback is executing is on,

the callback can be interrupted. How ever, it is interrupted only when it, or

a function it triggers, calls

drawnow, figure, getf rame , pause,orwaitfor.

Before performing their defined tasks, these functions process any events in

the event queue, including any waiting callbacks. If the executing callback, or

a function it triggers, calls none of these functions, it cannot be interrupted

regardless of the value of its object’s

Interruptible property.

If the

Interruptible property of the object whose callback is e xecuting is off

then the callback cannot b e interrupted, with the following exceptions. If

the i nterrupting callback is a

DeleteFcn or CreateFc n callback o r a figure’s

CloseRequest or Resize Fcn callback, it interrupts an executing callback

regardless of the value of the executing callback object’s

Interruptible

property. These callbacks too can interrupt only when a drawnow, figure,

getframe, pause,orwaitfor function executes.

After the process that interrupts a callback completes, the callback resumes

execution where it halted w hen interrupted.

The callback properties to which

Interruptible can apply depend on the

objects for which the callback properties are defined:

• For figures, the

Interruptible property only affects callback routines

defined for:

- ButtonDownFc n

- KeyPressFcn

- KeyReleaseFc n

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