User`s guide

18 Chapter 3 - Using MonitorMouse for OS/2
affected by horizontal and vertical adjustments on the monitor and by the physical
mounting of the touchscreen.
Additional calibration complications include image blooming, where brightly-
colored images expand, and the "pincushion" effect, which causes the corners of
the display to be stretched. Poor display linearity can cause similarly-sized boxes to
be larger at the edges of the screen than they are in the middle, or vice-versa. The
displayed image can also be tilted. Even changing video modes can affect the
screen size.
Perfect calibration cannot be achieved in all circumstances. For example, the user
can encounter parallax problems with a change in position, or because the present
user is not the same stature as the person who calibrated the screen.
Even the most sophisticated calibration techniques can only partially overcome
such variations. Therefore, most touchscreen software uses only a two- or three-
point calibration sequence and instead relies on well-placed touch zones and
appropriate user feedback.
The three-point calibration sequence used by the Touchscreen Control Panel
automatically corrects inverted touchscreen installations and backwards cable
connections. X- or Y-axis inversion is normal for most touchscreens.
Once calibrated, MonitorMouse for OS/2 will be ready to run automatically each
time the system is restarted. Recalibration should only be necessary after moving
or resizing the video image, or after changing either the touchscreen, controller, or
monitor.
Mouse Button Emulation Mode
Four mouse button emulation modes are supported, equivalent to the
corresponding mode numbers in the other versions of the MonitorMouse family of
products. The current mode may be changed with the Touchscreen Control Panel.
After selecting the mode, CONFIG.SYS is updated (-m flag). Mode 6 is the
default.
The modes vary in the button actions they support (clicking, dragging, double-
clicking, etc.) You should choose the simplest mode that will work for your
application.
Mode 0 Left button clicking only. No dragging or right button is supported.
Works with large targets. Recommended for public kiosk
applications.
Moves the mouse pointer to your point of touch and “clicks” the left
button. A beep will confirm the click. The mouse pointer will not