Autocompletion based on filenames in a directory

I want to have a function in my zsh for faster accessing my todo-files. It s开发者_高级运维hould look inside the folder ~/tasks where i put my todo-lists and stuff. Now i want to type task p and when I hit tab, it should use the files in that directory for autocompletition. Can anyone point me some direction? Or share some snippet to work with?

Thanks

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This would seem to do the trick:

compdef '_files -W "$HOME/tasks"' task