Devel now contains one more change. I've changed the *EXIT* key (which
isn't needed in the Leo tab version of the calculator) to *TOCLIP*. It
copies the "X" register - the calculation result - to the system clipboard.
On Monday, May 1, 2023 at 9:31:00 AM UTC-4 Thomas Passin wrote:
> When I was using TurboPascal and doing a lot of numerical 2-D integrations
> with complex numbers, I actually wrote a little library module to calculate
> with complex numbers as if I was using an RPN calculator. So you could
> push a complex number on the stack, pop it off, multiply or add the two
> numbers on the stack bottom, etc. At that time TurboPascal did not have
> complex numbers of its own, IIRC. If N1 and N2 were two complex numbers
> you could write, for example (based on hazy memories from long ago):
>
> push(N1)
> push(N2)
> CMul()
> { and so forth, pun intended }
>
> I enjoyed using the library because it was so easy for me to write and
> debug calculations. I just pictured how I would do the calculation on my
> HP calculator and walked through the steps. I timed it once, and the extra
> overhead of using the stack library compared with a hand-crafted sequence
> of operations was about 25% (I'm sure my implementation could have been
> improved, it was pretty brute-force). But the ease of writing the
> calculation and debugging it - the RPN library won hands down.
>
> On Monday, May 1, 2023 at 9:02:49 AM UTC-4 jkn wrote:
>
>> I got to play with a then- just out Hewlett Packard HP-67 RPN calculator
>> at the age of around 14. It blew my mind ... and may well have directly led
>> to me doing what I do to this day.
>>
>> J^n
>>
>> On Sunday, April 30, 2023 at 5:59:34 PM UTC+1 tbp1...@gmail.com wrote:
>>
>>> RPCalc is a recent discovery for me. As originally written, it runs as a
>>> standalone program, and requires Qt5. You don't need to use the installer
>>> package for Windows. Just download the Linux tarball, decompress it, and
>>> navigate to the "source" directory. The file to run is - surprise! -
>>> rpcalc.py. It seems to do everything I want from an RPN calculator, except
>>> that copying the stack bottom is awkward.
>>>
>>> To adapt it for Leo, one change was to combine all the source files into
>>> one Leo @file tree. Another was to change the imports to use leoQt, which
>>> makes it easier to adapt to Qt5 vs Qt6, and anyway is essential if the
>>> program is to run in a Leo frame. I'm still finding little things that
>>> aren't working for both Qt5 and Qt6 - mostly enums and flags - but I'm
>>> making progress. But overall, most of the functionality works and the thing
>>> is usable as it stands. I'll post an updated outline soon, and after some
>>> more work it should be ready to appear in the Leo repo.
>>>
>>> On Sunday, April 30, 2023 at 11:55:06 AM UTC-4 jkn wrote:
>>>
>>> I have wondered about suggesting something like this for a while, so
>>> thank you Thomas. My 'main' editor has a simple HP calculator built into it
>>> and it was an easy step to consider one for Leo.
>>>
>>> I didn't know about RPNCalc (I have some Android RPN apps on my phone,
>>> as well as a real HP-35s), but it sounds like a good choice.
>>>
>>>
>>> I've used HP RPN calculators since way back in HP-45 days. I liked
>>> the HP-25C even better, and finally ended up using an HP-15C. Mine still
>>> works though it's slightly misplaced just now. On my computer I've been
>>> using Free42, which seems to me to be a good balance between readability,
>>> complexity, and capability. Now it looks like RPCalc will be taking over
>>> from Free42.
>>>
>>>
>>> I will take a look at this shortly - thanks.
>>>
>>> J^n
>>>
>>>
>>> On Sunday, April 30, 2023 at 12:03:14 PM UTC+1 Edward K. Ream wrote:
>>>
>>> On Sat, Apr 29, 2023 at 12:42 PM Thomas Passin <tbp1...@gmail.com>
>>> wrote:
>>>
>>> I have adapted the open-source *RPCalc* calculator to run in a tab in
>>> the Leo log frame. This calculator is a Reverse Polish Notation (RPN)
>>> style calculator, which IMHO is much better than the algebraic-entry
>>> type. It is the type of calculator that Hewlett-Packard made famous.
>>>
>>>
>>> Thanks for this work, Thomas. The calculator appears as expected for me.
>>>
>>> PR #3301 <https://github.com/leo-editor/leo-editor/pull/3301> is a
>>> draft containing the files you mention. It's a good start. The PR lists
>>> three problems.
>>>
>>> Edward
>>>
>>>
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