Refresh

Refresh[expr,opts]

represents an object whose value in a Dynamic should be refreshed at times specified by the options opts.

Refresh[expr,None]

specifies that the value of expr should never automatically be refreshed.

Details and Options

The following options can be given:
TrackedSymbols Automatic symbols whose changes trigger an update

UpdateInterval Infinity time interval at which to do updates
When Refresh[expr,opts] is evaluated inside a Dynamic, it gives the current value of expr, then specifies criteria for when the Dynamic should be updated.
When one Refresh appears inside another, the innermost Refresh takes precedence.
Refresh[expr] resets automatic updating even if it appears inside Refresh[…,None].
The setting UpdateInterval->t specifies that updating should be done at least every t seconds.
Refresh has attribute HoldFirst.

Examples

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Basic Examples (1)

Make a dynamically updating clock:

In[1]:=

Out[1]=

Scope (2)

See Also

Dynamic FinishDynamic Clock Update Tasks

Tutorials

Related Guides

Related Links

Demonstrations with Refresh (Wolfram Demonstrations Project)

Introduced in 2007

(6.0)

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