Tier 3Roku. The shared AppDialog with one button. The channel opens folders, video, audio and images; anything else opens this dialog instead of a screen.DialogStyle.brs · scrim · surface · panelBorder · primary · textInverse
Unsupported files never open a screen
isFileSupported accepts FOLDER, VIDEO, IMAGE and AUDIO. Files, Search and History all call this dialog; Files only filters other types out when Only Show Media Files is on.
One button, OK, focused and filled primary. Closing returns focus to the row that opened it.
put.io
History
document-scan-march-2026.pdf
Aug 12, 2026 - 210 KB
podcast_ep127_final_mixdown_v2.mp3
Aug 9, 2026 - 72 MB
Oops :(
We're unable to show this kind of file
on this app (for now)
OK
AppDialog · file not supportedOpened from a History row whose file is a PDF. The message runs past 34 characters, so the panel widens to 1044 and wraps at 40.
triggershowFileNotSupportedDialog() in shared/utils.brs, called from Files, Search and History
supportedFOLDER · VIDEO · IMAGE · AUDIO, each mapped to its own screen by getScreenFromFileType
titleOops :(, h1 45, centred
bodyWe're unable to show this kind of file on this app (for now), body 36 textMuted, centred lines 48 apart
buttonsOK only: 936x78, primary, focused on open
tier-4 twinthe full-screen ErrorState in tv-s06-states: Unsupported file type + Go back
Contract: platforms/roku/DESIGN.md · source: components/shared/utils.brs, components/shared/AppDialog/AppDialog.brs
Do not add a second button: there is nothing to do with the file on this channel.