Walter wrote: ↑Wed Oct 30, 2019 5:38 pm
The RadioButton seems to be the space wasting alternative of the good ol' rotary switch.
Exactly so. :) But with two differences: 1. With a rotary knob, to change the state between two non-adjacent choices, you have to turn on (and off) all the intervening states; with a set of radio buttons you can go directly from any state to any other -- the radio button array is "direct access" as it were. 2. A set of radio buttons is much easier to implement than a rotary knob in a computer user interface, and much easier for the user to manipulate -- unless, perhaps, they have a 3-d holographic interface and some sort of virtual reality gloves with haptic feedback, which is a bit of a tall order for a calculator.
Walter wrote: ↑Wed Oct 30, 2019 5:38 pm
AFAICS, the 43S doesn't need any radio buttons since the respective current settings of DEG/RAD/GRAD/MULπ/D.MS, etc. are indicated in the status bar. YMMV
Indicating the current state is only half the job of a set of radio buttons. The other half is to provide an easy way for the user to change the state. Is the status bar of the 43S interactive such that the user can use it to change, for example, the angle mode? [I hope that question doesn't come across sounding rhetorical/sarcastic, it is an honest question asked from ignorance -- I'm new in this world.]
Walter wrote: ↑Wed Oct 30, 2019 5:38 pm
The CheckBox is clear now (1 box for two softkeys, binary choice).
This doesn't sound quite right. A check box has
one box (or space) for a tick / check mark to appear or not appear for
one choice (for which there are exactly two options). For example, if you display or do not display the time depending upon the state of a flag, one could represent that flag with one check box labelled something like "Show clock". There would not be
two soft keys, just one to toggle the check mark (and the flag) on/off. [Sorry, perhaps I have misunderstood what you mean by "two softkeys".]