The Chordic Keyboard on a
Multi-touch Sensitive Screen
Four extra bars
have been added to enable simultaneous pressing of the top and bottom
keys, as well as all three keys.
G, K, O and S keys have the same size of effective area as A to F and
indicate pressing the two neighbouring keys.
Please note that there is no need to memorize any character tables
all symbols will appear on the keys.
and Windows Phone 7 GKOS applications - More about design
character sets are exactly the same for both mehods. All PC keyboard
functions and characters can be made available.
On the touch screen, you do not even need this cheat sheet!
Basic Guidelines for software and
- Follow the character set to the least detail, else the whole idea of
a harmonized keypad will be lost.
- Keep in mind that the effective areas of keys A to F and G, K, O and
S should be of the same size.
- Pressing G, K, O and S really mean the same as pressing both
neighbouring keys simultaneously.
This is the way different symbols and characters are shown on other
keys while one key is pressed (shown in blue).
figure on the left shows how the GKOS keyboard looks
on the touch-screen when no keys are pressed.
figures below show for each key pressed
the characters on other keys change.
Backspace pressed (The symbols on the right hand keys: Left
Arrow, Word left, Home)
Space pressed (The symbols on the left hand keys: Right Arrow,
Word right, End)
the corresponding parallel set (123 set of SYMB set) is shown in a
similar way. It is not
necessary to implement the SYMB character set for providing all
characters; it only speeds up typing single characters from the
parallel set (123 or abc mode sets). The
keypad application does not have the SYMB option, just the abc, 123 and Shift sets, but still all
characters can be typed. - The light blue
color indicates areas that may also be highlighted to more clearly show
that the smaller keys, hidden under thumbs, are pressed. This also
helps associating the character to the form that the corresponding
highlighted keys create (e.g. 'P' and 'J').
Here is the
table of characters for implementing the application: http://gkos.com/table
which also includes a link to native (national) layouts.
Text editions 8-17
May 2010. Minor styling of images 31 May 2011.