Programming keypad

[bryanchun]

• More space to accommodate multiline editing
• Fewer buttons, but carefully picked in each page to suit the context

v1 (Physical prototype)

• delete new line nav up nav down
• save (cancel) clear mode (COMP/CMPLX/SD/...)

Idea pool (free to combine):

• After selecting for example If, this button will become Then, and then IfEnd; so on and so forth for other buttons, to achieve the effect of "predicting" user input token
• Assume If creates a block, hence IfEnd is automatically appended, and the button can be changed to Else to give more input options
• Candidate suggestion row as in soft keyboard, implemented by AI or pure logic

• First two columns: recently used variables, third and fourth columns, recently used constants
• May include default constants like &pi and &exp
• Prev/Next page to navigate between pages containing all variables (1st & 2nd col) and constants (3rd & 4th col) in ascending order

• When arc is selected, sin cos tan all becomes asin acos atan, and the arc button will become hyp
• Press hyp to change the 3 buttons into sinh cosh tanh, then the hyp button will become arch
• Press arch to change the 3 buttons into asinh acosh atanh, then the acrh button will become arc again but unselected, the 3 buttons return to sin cos tan

• More functions can be included
• Suggestion of feature though not quite possible: let users define programs that run like functions, e.g.

myFunc(1, 2, 3) + 4