There is room for a lot of functions that way. With some luck and careful thinking there might be a chance to shrink the basic function buttons to a single row on top of the keyboard. Each button could group related functions. Instead of having three buttons for SIN/arcSIN, COS/arcCOS and TAN/arcTAN, it would be possible to put all those six functions (and more) side by side with a single TRIG button. Screen estate can be saved for the stack by having groups of functions. A similar use is with the virtual keyboard layouts too. When typing there is the possibility to choose accents by longpressing the base character. These registers hold values in an unusually deep stack (probably a dozen) and should have reduced size. Y, Z and T are important for a number of functions and should have a medium size font. The X register, where the current numbers go should have the largest font. Maybe I should doodle a simple mock-up?Ī flu gave me unexpected time to think.and a slightly fuzzy brain too.ĭifferent font sizes would be of good use to enhance readability and to save screen estate.
I would very much like to have a similar design for the RPN variant. The Jolla calculator still has the sleekest layout of all calculators I've ever seen. The rest of the registers could simply be numbered 0 to 9, if they need to be numbered at all. Naming the first ones X, Y, Z would make the button labels familiar for old hands and easy to understand for newbies. So the number of registers could be limited. The unlike RPN calculator could also let the oldest values fall off the stack. They are also used to the fact that beyond those registers the numbers are lost. People using RPN calculators are used to having very few registers. If stack registers could be manipulated by dragging then all registers would be useful. The user needs to drop registers to reach the older values. The deep stack of RPNcalc gets hard to handle because the deepest registers are beyond the reach of the stack manipulators. The touch stack is still missing, though. Both have fragments worth using as part of a new mix. Both Quanto Fa and RPNcalc are useful in their current states (I use them both).
#Free42 trig functions disappeared code#
There seems to be almost enough code for the unlike RPN calculator. There’s no need for programming or graphs. That is the calculator app I would like to find in the Jolla Store some day. And the entire stack can be emptied in the same manner as in the Jolla calculator. These registers can be manipulated by simply touching or dragging. My guess is that six or even eight stack items would be visible at once on the screen. The latest number would be in a bigger font than the others. The rest of the screen would show a scrollable stack of numbers. Above the keypad there would be two (or maybe three) rows of function buttons. The only exception would be that would replace. In fact, the lower part would be almost identical to the Jolla counterpart. There would be groups of buttons marked with different colours. The look would be something like the Jolla calculator app. I think the end result was something like ten buttons for a really minimalistic calculator like Quanto Fa, but the number of functions could be increased. Combining functions brought the number of buttons down. The trigonometric functions would have the arc versions available with a long press and similar arrangements can be done with other function pairs such as square root and x squared. With my HP calculator there are only four of these registers, but why have such a limit on a touch-screen app? If the number of function buttons could be minimized then more of the screen could hold a stack of registers. So while trying to copy the nice layout of the Jolla calculator, but adjusting it for the special needs of a RPN calculator, a strange idea was born.Ĭould all stack manipulation be done with the touch screen? It's a handy system that erases the need for dedicated buttons for storing and retrieving numbers from memory. After making a calculation it is possible to copy that number as part of a new calculation. The Jolla calculator handles things in another way. There are also some memory registers with related buttons (STO and RCL). Swapping the latest two stack objects and rotating the last four are common. See, most RPN calculators have buttons for certain stack modifiers. So I decided to wish for a slightly unlike RPN calculator app. It's nice and gets the job done, but the Jolla calculator gave some inspiration. Quanto Fa uses reverse polish notation (RPN) which is the way I usually think. So I downloaded Quanto Fa from the Jolla Store. But it uses in-fix notation and it has no scientific functionality. The Jolla calculator seems too simple when first trying it and yet it has features that simplify calculations without adding clutter.
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