Touchscreen User Manual – Issue 1
Zytronic X-Y Controller (Serial and USB)
41
5.4 Properties Page
The
Properties
page defines device properties. The
Properties
page is shown in Figure 35.
Figure 35:
Properties Page
Function
Description
Associates a name to the device. By default the name
is the driver’s controller device name.
Applies a filter to produce smoother drawing.
Software implementation of a low pass filter
algorithm to remove jitter. This is a more advanced
approach to filtering that can improve drawing but
will affect the speed of drawing the higher the value
used.
The Lift off Time value specifies the time interval
required to register a stylus lift after the last touch
packet is received. Lift off time is defined in units of
20ms. This value is used to perform a pen up if the
‘Use Lift off’ packet is disabled otherwise Pen ups are
generated as soon as the stylus leaves the pointer
device display.
However, because this timer is triggered after each
received touch packet it is important to Ensure the
value is greater than the time interval between data
packets otherwise pen up events will constantly be
generated.