Visualize "Can't buy unit because nowhere to place"

[metablaster]

Is there an existing issue for this?

• I have searched the existing issues

Game Version

4.14.16

Describe the bug

In this save file to buy a worker it costs 700 gold.
I have 714 gold but can't buy the worker until next turn.

Steps to Reproduce

1. Load save file
2. Go to city Rome
3. Try to buy worker
4. The button to buy worker is grayed out until next turn

Screenshots

Link to save file

Rim - 90 poteza-cant-buy.zip

Operating System

Linux

Additional Information

This happened on same turn when settler was built.

[metablaster]

Oh, I just figured out that was because there was settler unit in city tile, sorry!
Maybe the grayed out button should show a tooltip as to why a unit can't be bought?

edit:

I would turn this into feature request and change the title but can't add github labels.

[yairm210]

I'm not sure how I would visualize this
Text would be far too big, what would be a good icon for "out of space"?

[metablaster]

what would be a good icon for "out of space"?

I found 2 icons on flaticons.com

https://www.flaticon.com/free-icon/crowd_5916375

https://www.flaticon.com/free-icon/crowd_5916332

I like the first one more and sadly there aren't good alternatives out there, maybe someone can find a better one.

[sulai]

I would like to suggest to allow the user to press the button. A dialog shall appear explaining as to why it's not possible to buy a unit right now. This is in line with the confirmation dialog in case a purchase is possible.

As an additional icon to show on the button, maybe something like this?
https://www.flaticon.com/free-icon/prohibition_2478266

[yairm210]

Oh, interesting 🤔
That could be a theme for other places as well, we should have a "unavailable but clickable for information"-style - probably a grayish-blue, this could fit other "disabled" actions as well (thinking of unit actions)

[sulai]

Or have the button disabled with a clickable question mark next to it.

Another style would serve as well, visually close to a disabled button.