Haven't met this bug yet...... Maybe you can try "sudo apt reinstall deepin-calculator"?

No problem here.

Fresh install or dist-upgrade ?

sudo apt reinstall deepin-calculator not working.

Both machines was upgraded from beta

I think this is an issue with the automatic theme color switching.
I have also the same white text on white button on calculator and hidden taskbar items (like wifi, bluetooth). On the visible task icons (battery, sound volumne) its ok with black text on white background.

It was beacause theme switch
DTK not work well for other theme icon (while theme swtich, it will missing some icon).

I have a problem all the time. On two machines. Both were updated from the beta and it's the same. Changing the theme doesn't help. I even created a new user account and no changes too.

Same bug here!

I don't have this problem

https://gitee.com/superendermans ... aw/master/dcalc.zip
That would be what you need

How to download it without logging and what is it?

Use wget
It's a dtk5 version of dcalc 2

http://www.shenmo.tech:38324/other/RCalc.7z
This is a 3rd party dtk calculator,even more efficient than the official version

Hey, after updating to 1003 the problem is still not solved. I do not know if it is not related to the location, because in Poland my friends also have this problem.

I could not reproduce this problem on two different machines.   

What type of machine do you have?  What kind of video card?

Same bug here, dark theme and italian translation..

Edited by oldfield at 2020-10-24 00:30

I found a temporary solution on the Polish forum.

Edit:

sudo nano /usr/share/applications/deepin-calculator.desktop

Swap

Exec=deepin-calculator

on

Exec=env LANG =en_US deepin-calculator

and

TryExec =deepin-calculator

on

TryExec=env LANG =en_US deepin-calculator


Then the + - signs appear