How to create "invisible" imagebuttons or hotspots?

[unregistered]

I'm searching for a way to include invisible hotspots or imagebuttons to a screen or an imagemap.

Currently, I use the regular hotspot function from imagemaps. However, these hotspots take the graphics from the ground, idle or hover images. The screens have random animations added to them, so these hotspot areas are static and as soon as an animation goes behind the hotspot area, it disappears because the imagemap always puts itself in front when there's a hotspot defined.

The code I have the problem with is really just a typical:

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hotspot (0,0,200,1097) action Jump("{somelable}") {some style parameters}

Is there a way to create a hotspot area or clickable mousearea over the screen that is just invisible and does not interfere with what is drawn on the screen? I don't need hover states or anything, just a rectangular area and a click action.

The only way I found this to work is using images with empty alpha planes and with the correct size and use them as imagebuttons on the correct position. But I have many hotspots (way over 100) and I think there must be a better way then filling up my projects with useless files. I could probably also define imagebutton images with ATL, but that would mean I need an image definition for every of these hundreds of hotspots. It would also be great if I wouldn't have to change the code so much and probably there's some style argument for a hotspot that could fix that.

Any ideas?

[unregistered]

Sometimes you find a possible answer just when you posted a question:

I just realized I can put a transform to a hotspot with "at". When the transform has full alpha, the hotspot is invisible. I think that should be it:

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transform fullalpha:
    alpha 0.0

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hotspot (0,0,200,1097) action {...} at fullalpha

This makes everything from the hotspot invisible, including hover states.

I'll leave this in here just in case somebody wondered (or in case I missed something, then I might add a post).

[m_from_space]

Just use a normal button and place it somewhere. Buttons don't take any parameters and are just invisible areas to interact with, if you don't give them some color or whatever.

https://www.renpy.org/doc/html/screens.html#button