Properties |
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Controller properties
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The
Properties dialog defines device properties. |
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Function |
Description |
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Associates
a name to the device. By default the name is the driver’s controller device
name. |
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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. |
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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. |
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Stabilization
causes small movements to be ignored. |
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Applies
a filter to produce smoother drawing. Averaging takes the average of the last
N co-ordinates. This is a very basic approach to filtering that can improve
drawing and not affect drawing speed. |
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Priority |
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In a
multi pointer device environment this setting indicates the priority given to
the device: |
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Defines
the interlock release time, as described above. |
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Only
shown if a pen up data packet is generated by the device on stylus lift off.
If enabled the pen up data packet is used to invoke pen up otherwise the pen
up processing will generate a pen up event at the lift off time threshold as
described above. |
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The
Anchor Mouse option is set if the mouse cursor is to return to its original
position after the pointer device has been used. Normally used in
multi-monitor configurations where the cursor is to return to another
monitor. |
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Indicates
if the device is enabled. If the device is disabled the hardware port’s
resources are available for use by another device or process. This is a way
of freeing up the resources without having to uninstall the driver. One
example of this is where a serial to USB converter is used and the device
needs to be ‘stopped’ before it can be safely unplugged from the system. If
UPDD has a connection to the device it cannot be ‘stopped’ until disabled by
UPDD. |
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Less
common, advance features, enabled as required: |
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Edge
Acceleration |
Settings whereby cursor accelerates towards the edge
of the screen when stylus moves towards the edge. Useful if cursor needs to
slide off desktop to invoke a system function, such as hidden task bar that
is shown when cursor is pushed off edge. The Height and Width settings are based on a 65535 x
65535 logical desktop area (3000 works well).
The gain value is the movement accelerator (20 works well). Only works for primary monitor. In some environments the edge acceleration function
may result in the cursor moving beyond the calibration area in which case the
‘Ignore touches outside the calibrated area’ should not be set. |
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Ignore
touches outside calibrated area |
Touches generated outside a calibrated area can be ignored
e.g. a touch screen is larger than the video display area which may be used
for UPDD Toolbars only. If set, when
this area of the screen is touched the touch is ignored. |
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Mac OS X only - Enabled if the touch screen
is used to run classic mode applications. With this enabled the driver
is optimized for classic mode but will still work in native mode and changes the way mouse clicks are
fed into the OS. If this
is incorrectly set for the mode in use it is possible to lose the occasional
touch when tapping the screen fast. |
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Mac OS X only Version
4.0.x. It was discovered that with Mac OS 10.3.6 the low level OS driver
interface does not correctly handle mouse emulation if keyboard keystrokes
are being used with mouse clicks e.g. ‘CTRL mouse click’ to select multiple
items. This may be corrected in later versions of Mac OS X. If you experience
this problem enable this setting. When enabled the driver uses a different OS
driver interface that overcomes the problems seen with the low level
interface. A system reboot is needed
for this new setting to be activated in the driver. Version
4.1.x. A new mouse port interface was implemented which allows keyboard mouse
clicks and therefore this setting is now redundant and will be removed once
the new interface is proven. |
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Mac OS X only - The driver can automatically
adjust calibration if the system is switched between Landscape and Portrait
views. Landscape is always 0° but Portrait can be either 90° or 270° and this
is selected in the System Preferences Display dialog. Unfortunately we have not found a way to
programmatically determine the degree of rotation as selected in the Display
dialog so it has to be manually defined here such that UPDD can sync
calibration once the system is set into Portrait. Given that UPDD does not know when the
screen is rotated, the rotate logic is triggered when the video resolution is
set in the rotated mode to represent Portrait mode – does not happen
automatically as one would expect (e.g. 1024 x 768 is changed to 768 x 1024).
See Rotate
document for additional rotate information. |
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