[Post-Install] KCalc

[vanadiumboy]

Problem 1:
If I do any calculation, such as
1 + 1 =

and I try to copy the result by clicking Edit -> Copy
the result doesn't get copied to the clipboard. This was working with Kubuntu 24.04


Problem 2:
If I press 1000
press divide
press 5
press the exponent button (it is written x 10^y on the button)
press 8

the result is 20,000,000,000 (20 billion)

instead of 2e-06

[Snowhog]

As to getting KCalc to display results as scientific notation:

Adjusting Precision Limits

If you want KCalc to seamlessly switch to scientific notation only when numbers exceed a specific length:

• Go to Settings → Configure KCalc...

• Under the General tab, look for Precision (Maximum number of digits displayed).

• KCalc is designed to automatically trigger scientific notation (e.g., 2.34e12) once a calculated number surpasses this defined digit threshold. You can lower this value if you want it to trigger sooner.

Making this setting change doesn't affect what you have already displayed. You can Edit the entered values and delete the last one and reenter that input and the output will change to scientific notation.

[life0riley]

Problem 1:
If I do any calculation, such as
1 + 1 =

and I try to copy the result by clicking Edit -> Copy
the result doesn't get copied to the clipboard. This was working with Kubuntu 24.04


Problem 2:
If I press 1000
press divide
press 5
press the exponent button (it is written x 10^y on the button)
press 8

the result is 20,000,000,000 (20 billion)

instead of 2e-06

I can reproduce this behavior.
It doesn't work to highlight and right click copy.
It doesn't work to highlight --> click Edit --> Copy in the Main Toolbar.
It does work with this: Ctrl+C

I haven't searched yet. Is there a bug report for this?

[Snowhog]

I haven't searched yet. Is there a bug report for this?

I found one bug report, but it's from 2024, shows it's assigned, but that's it. Only the initial report. It is with Kcalc on KDE neon. So based on this one report from 2024, seems that this issue has been around for some time! Bug 492680 can't copy calculation result as expected

[die.boer]

i just tried it , if i go 1+1 = the answer is 2
if i highlight the 2 and press ctrl+c ,it copies to clipboard

also if i go 1+1 the answer shows below (2) , if i then click in the block with the 2 in , it'll blink , then press ctrl+c it copies the 2 to clipboard (no need to highlight the 2)

[Snowhog]

also if i go 1+1 the answer shows below (2) , if i then click in the block with the 2 in , it'll blink , then press ctrl+c it copies the 2 to clipboard (no need to highlight the 2)

You actually don't need to press ctrl+c. The act of clicking in that box copies the value to the Clipboard. I just verified that.

[die.boer]

You actually don't need to press ctrl+c. The act of clicking in that box copies the value to the Clipboard. I just verified that.

ah nice, didn't check for that
even shorter way

[vanadiumboy]

You actually don't need to press ctrl+c. The act of clicking in that box copies the value to the Clipboard. I just verified that.

I tried it. It copies nothing to the clipboard.
I see a clipboard entry but there is nothing. I look at the clipboard by clicking the paper clip on the system tray.

[rofar]

I see the same, but if I mark the calculation I want to copy, then right click and copy, it shows up in the clipboard.

[jrwatts]

I have a vague recollection that vanadiumboy is using X11 rather than Wayland; could this be the issue?

[claydoh]

I have a vague recollection that vanadiumboy is using X11 rather than Wayland; could this be the issue?

No it shouldn't be. If anything, it *might* have been the other way around (automatically putting the value in the clipboard), but years ago.


But may be relevant:
https://bugs.kde.org/show_bug.cgi?id=492680

I can repro this in both Wayland and x11 in a VM.

[vanadiumboy]

I have a vague recollection that vanadiumboy is using X11 rather than Wayland; could this be the issue?

I am using Wayland but I think this is a programming problem with KCalc. I have KCalc 25.12.3 (comes with Kubuntu 26.04). They have probably made too many changes.
Copying and pasting is a typical operation.
I think what is needed is some automated testing methods. A calculator is a simple app and should not have bugs, sort of like how your physical calculator is bug free (or nearly).

This is an old bug report I made. Try it with your current KCalc (It works fine for me, it should give 900)
https://bugs.kde.org/show_bug.cgi?id=443276

[rofar]

did you see my post above? try mark the numbers you want to copy, then right click and select copy from the drop-down menu. At least a work-around.