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Canvas_Redraw

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Description

 

Update buffered graphical statements, drawing them to the selected canvas target.

 

Syntax

 

Canvas_Redraw

 

Returns

 

None

 

Parameters

 

Name

Type

Optional

Meaning





 

Remarks

 

Windows usually runs with time slices of about 15 to 16msec (64Hz).

When you do Canvas_Redraw (or any other Canvas update of the visible window on the screen) then the update is done and the remainder of the time slice is handed back to the operating system even though you could do other actions with it.Since you update your screen after each data item you will then be limited to incoming data at the time slice rate of 64Hz.

 

The quick fix is to tell Windows to reduce the time slice to a minimum. It will usually reduce it to 1 or 2 msec.

You can do it using TimeBeginPeriod / TimeEndPeriod pairs functions.

 

Restrictions

 

See also

 

Examples