System.Taffybar.Widgets.PollingLabel

This is a simple text widget that updates its contents by calling a callback at a set interval.

Documentation

pollingLabelNew

Arguments

:: String

Initial value for the label

-> Double

Update interval (in seconds)

-> IO String

Command to run to get the input string

-> IO Widget

Create a new widget that updates itself at regular intervals. The function

 pollingLabelNew initialString cmd interval

returns a widget with initial text initialString. The widget forks a thread to update its contents every interval seconds. The command should return a string with any HTML entities escaped. This is not checked by the function, since Pango markup shouldn't be escaped. Proper input sanitization is up to the caller.

If the IO action throws an exception, it will be swallowed and the label will not update until the update interval expires.