display .png that is created by two var in osweb

drorgarbi · May 2020

hi

I’m converting my experiments to OSWeb and I am currently facing

a problem,

when using:

draw image center=1 file="[letter_arb1].png" scale=1 show_if=always x=323 y=-175

z_index=0

everything works fine

but when using

draw image center=1file="[[cond]_arb1].png" scale=1 show_if=always x=323 y=-175

z_index=0

and cond = letter the experimant crash with:

Uncaught TypeError: Cannot read property 'data' of undefined

and in the console: "[letter_arb1].png" does notexist"

any suggestions?

Dror

sebastiaan · June 2020

Hi Dror,

Thanks for pointing this out. Nested variable definitions indeed they don't work in OSWeb. Until that's fixed, as a workaround, you can define an intermediate variable in the Prepare phase of an inline_javascript item:

vars.my_image = vars[vars.cond + 'arb1']

And then use this in the sketchpad like so:

draw image center=1file="[my_image].png" scale=1 show_if=always x=323 y=-175 z_index=0

Hope this helps!

Sebastiaan

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