@dddiam, this exists already, but when coding you don’t use a value like
No Color instead you specify an alpha value of 0 to make something transparent.
When you use the
Make a Color block you can specify either 3 or 4 parameters, R,G,B or R,G,B,a, These letters stand for Red, Green, Blue and Alpha, and can be any value between 0 and 255 (2^8 for those of you who work in binary)
Alpha values correspond to a colour’s opacity, so in your case you are telling it to have no opacity, in other words that it should be see through.
Some languages uses alpha values between 0 and 1, the App Inventor documentation makes reference to 0 and 100 but Thunkable accepts alpha values between 0 and 255. It’s possible that App Inventor changed this and haven’t updated their docs yet?
Anyway, you just need to use the
make color block as in the picture below, and that should work for you.
I’ve also included a demo app of the code in action.
transparencyExample.aia (124.2 KB)
transparencyExample.apk (2.2 MB)