Control Downloads
There are 3 methods available to control a download, and 1 method to check the download's current state.
It may take some time to perform these operations if the download has a low TPS, as each thread checks the current state/awaits a signal between each of their tiles.
pause & cancel are asynchronous for this reason, and will complete when all threads are paused or cancelled. resume returns immediately.
Pause/Resume
If your user needs to temporarily pause the download, with the ability to resume it at some point later (within the same app session), use pause and resume.
pause allows all threads to finish the tile they're currently downloading, then forces them to wait for a signal sent by resume before they can download their next tile. It does not write any buffered tiles to the store.
Use isPaused to check whether the download is currently paused.
Cancel
If your user needs to stop the download entirely, use cancel.
cancel allows all threads to finish the tile they're currently downloading, then forces them to cleanup and 'kill' themselves. Any buffered tiles are written to the store before the future returned by cancel is completed.
It is safe to use cancel after pause without resumeing first.
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