digitizer-capabilities

Arguments:

Returns a list of zero or more of the keyword symbols shown below, indicating the capabilities of the computer's touch input device, if it has one. nil will be returned if there is no touch input device.

Here are Microsoft's explanations of the capabilities. Apparently integrated means built into the computer (such as its screen) while external means connected to it (such as a tablet). Multiple inputs refers to multiple simultaneous fingers (or pens).

• :integrated-touch - an integrated touch digitizer is used for input.
• :external-touch - an external touch digitizer is used for input.
• :integrated-pen - an integrated pen digitizer is used for input.
• :external-pen - an external pen digitizer is used for input.
• :multi-input - an input digitizer with support for multiple inputs is used for input.
• :ready - the input digitizer is ready for input. If this value is unset, it may mean that the tablet service is stopped, the digitizer is not supported, or digitizer drivers have not been installed.

See also the touch-point class and About Touch Gesture Support in Common Graphics on Windows in cgide.htm.

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Created 2019.8.20.