Elo SDK provides a
programmers API for communication with the Elo Serial and USB drivers. The
functionality available to users for programming is as follows:
·
Get
raw and calibrated touch points from the touchscreen.
Gets
touch data from the controller. This data can be retrived in raw elo
coordinates or translated windows coordinate format. To get data use
EloGetTouch. This call may block
depending on the flags used for type of data expected. To cancel the blocking
call use EloCancel.
·
Change
touchscreen operation modes
Touchscreen
operates in the following modes:
These are same as the touch modes in the Elo Control Panel. You may get or change the operation mode using following calls:
·
Configure
drag delay
Dragdelay
allows the drag functionality for touchscreen. This value can be retrieved or
modified using:
·
Enable
or disable touch functionality
Touchscreen
can be enabled to report touch data to the windows system or disabled to not
report any touch data.
·
Configure
sound during touch
Every
complete touch is indicated by beep from the system. The frequency and time is
configurable, alongwith the beep being turned on or off.
·
Custom
alignment for touchscreen
Elo
provides a standard calibration utility for video alignment. The CALIBRATION is
used to convert touches from the Elo coordinate system to Windows virtual
coordinate system.
The driver uses the
following equation to convert a raw touch coordinate point from Elo coordinate
system to the Windows screen coordinate system.
Calibration equation is
Xcal = a + m*Xuncal,
where,
Xuncal, is in Elo coordinate system
Xcal, is in Windows coordinate system
m = nScrDx / nEloDx
"a", is the X offset value entry
nScrDx = distance between targets in Windows virtual coordinates
nEloDx = distance between targets in Elo coordinates.
To get the current calibration data from driver use EloGetCalibrationData, for changing the data use EloSetCalibrationData.
·
Define
touchscreen boundary
Touchscreen
boundary defines the bounding rectangle for the touchscreen on windows virtual
desktop. This facilitates in prohibiting touch on one monitor from being
propagated to the corresponding monitor.
·
Swap
touchscreen buttons
Use
this call to use the touchscreen with swapped button for next couple of touches
on the screen.
Swaps the button for the touch monitor for the touch count specified. Once the count is exhausted the SDK notifies the application, by sending WM_RELEASEBUTTON message to application window.
·
Configure
the touchscreen for left-handed users
For
left-handed users of mouse, set the touchscreen mode using
EloSetLeftHandedMouse call.
·
Retrieve
touchscreen diagnostics data
Diagnostic
information for touchscreen can be retrieved using EloGetDiagnosticsData.
This information is also displayed in the Elo Control panel>Properties tab.
·
Configure
touchscreen for gaming specific mode by enabling quick touch
Quick touch is an
enhanced mode of the touchscreen, usually used only for gaming purposes.
Touches on screen following each other very quickly in “Mouse Emulation” mode,
creates a drag box. Using this mode defining the quick touch area, creates two
touches.
·
Configure
Edge acceleration feature
Touching
towards the edge of the touchscreen is tough sometimes. This feature can be
used to accelerate touch towards the edges.
·
Define
touchscreen to automatically timeout after constant touch in same location
using Untouch timeout feature
For
dirt on screen this feature is very handy. If touches are created in the same
constant location automatic untouch is generated by the driver based on this
timeout.
·
Configure
right click on hold functionality
This
feature allows touchscreen to generate right clicks. A right click is generated
when the user continues to touch the screen. This can be configured using:
EloPubIf.lib provides the SDK for communicating with the Elo Serial and USB drivers. In order to, communicate with the either of the drivers add this library to the list of compile time dependencies of your application and use the appropriate interface in your program. Include the header file, EloInterface.h and EloErrorCodes.h in your application.
These files can be found on
Program Files\EloTouchsystems folder.
Please refer to the Appendix C, EnableDisable Sample Code for interface usage.