When a QR code encodes text, usually a sequence of several or more Unicode characters is encoded.
Recently I have been experimenting with making some QR codes that each contain just one Unicode character. The idea is that hopefully in the future these QR codes could be scanned using a mobile telephone that has a QR reader and a suitable app so as to build up a sequence of Unicode characters, such as a telephone number, without the user needing to be able to push buttons. This could potentially be useful to some people with some disabilities. Perhaps it could also be useful to a person trying to amke a telephone call from a mobile telephone in cold weather where he or she would prefer not to need to remove his or her gloves to make the call. There is also the possibility to encode some mouse events using one Private Use Area code point for each mouse event and having a set of QR codes that each encode just one Private Use Area code point. Thus scanning a QR code could be used to signal a mouse event without the need to be able to press a button. Each mouse event uses two Private Use Area code points, one for a symbol and one for the control code. Some readers might like to know of the following forum thread. http://forum.high-logic.com/viewtopic.php?f=10&t=3818 There is a font and three pdf documents available from within the thread. The items are as follows. POINT004.TTF Pointer Symbols 004 font a_simulation_about_an_idea_that_would_use_qr_codes.pdf experimental_table_top_for_telephoning_1200_by_800.pdf experimental_table_top_for_some_pointer_events_1200_by_800.pdf William Overington 8 October 2012
