Timer


Description

The Timer class implements a periodic timer. This is an invisible object, which calls the onTimer callback at a fixed interval (provided the object's enabled property is 1). The time interval is set by the interval property, and is expressed in milliseconds.

A Timer object can be a top-level object (created directly using ŒNEW,or the New or Create method of ŒWI). It can also be the child of the System object, of a Window or Form, or of any standard control. It cannot be the child of a pre-defined dialog or another Timer object.

Example


     ’DEMO_Timer;CB_TIMER;DEMO
[1]   © Sample function demonstrating use of the Timer object
[2]   DEMO„'Œ' ŒNEW 'Window'
[3]   DEMO.where„4 4 ª DEMO.scale„1 ª DEMO.size„7 30
[4]   DEMO.title„'Timer Example'
[5]   DEMO.myLabel.New 'Label' ª DEMO.myLabel.where„2 1
[6]   DEMO.myLabel.caption„''
[7]   © Set up 1-second timer which updates the label text
[8]   DEMO.myTimer.New 'Timer' ª DEMO.myTimer.interval„1000
[9]   © Create a little callback function which will run once a second
[10]  0 0½ŒFX 'CB_TIMER' 'DEMO.myLabel.caption„ŒTIME'
[11]  DEMO.myTimer.onTimer„'CB_TIMER'
[12]  ©
[13]  © Wait for the user to close the window
[14]  0 0½1 ŒWE DEMO
     ’

Properties

children class data enabled events interval methods name opened properties self tie

Methods

Close Create Delete New Open Send Set Trigger

Callbacks

onClose onDestroy onOpen onSend onTimer


Topic: APLX Help : System Classes : List of Classes : Timer
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