Idle Detection in WPF

Question

I'm new in using WPF so I have no Idea how to detect Idle time and show the main window after 5mins of Idle.

Can anyone help me? Thank you so much.

Fong

You need to Maintain a timer for your WPF app .. Which get reset Whwnever any event occurs .. Thats how you can detect Idle time for your Application – Fever

Answer 1

You can do;

var timer = new DispatcherTimer (
    TimeSpan.FromMinutes(5),
    DispatcherPriority.ApplicationIdle,// Or DispatcherPriority.SystemIdle
    (s, e) => { mainWindow.Activate(); }, // or something similar
    Application.Current.Dispatcher
);

picked up from here

Properly

How would the timer be reset when a user interacts with the application? – Swizzle

Good point. maybe recreate the timer as a result of Window.Activated event firing. Then when user brings to focus it resets. Or create the time and just stop and start it on Activated. Maybe use InputManager.Current.PreProcessInput and reset in the handler for this – Properly

A more complete implementation on the same principle is here https://mcmap.net/q/387370/-wpf-inactivity-and-activity – Properly