DebounceMonitoring

Extensions to filter out repeated function calls caused by false or accidental clicks or touches.

• One-line integration
• Inlined, no method wrapping
• Shareable between multiple platforms
• Automated testing friendly

Installing

Add NuGet package to your .NET Standard 2.0 - compatible project

PM> Install-Package DebounceMonitoring

Usage

using DebounceMonitoring;

Debounce instance methods:

internal class ViewModel
{
    public void OnButtonClick()
    {
        if (this.DebounceHere()) return;

        // Handle the click
    }
}

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Debounce lambdas and local functions:

public Command ClickCommand { get; }

public ViewModel()
{
    ClickCommand = new Command(() =>
    {
        if (this.DebounceHere()) return;

        // Handle the click
    });
}

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Debounce static methods:

internal class Analytics
{
    public static void TrackEvent()
    {
        if (DebounceMonitor.DebounceHereStatic<Analytics>()) return;

        // Send the event
    }
}

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Rx Operator

This library also provides the simplest implementation of the debounce operator for Rx.NET (throttle in RxJs).

Example:

button.ClickAsObservable()
    .Debounce()
    .Subscribe(_ => OnButtonClick());

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Interval

The default debounce interval is 500 ms.
It can be specified as an argument:

this.DebounceHere(intervalMs: 1_000)

IObservable<T>.Debounce(intervalMs: 1_000)

or set globally:

DebounceMonitor.DefaultInterval = TimeSpan.FromSeconds(5);

Disable (for automated testing)

The DebounceMonitor can be disabled in your base TestFixture.Setup or globally in ModuleInitializer with ModuleInitializerAttribute or Fody.ModuleInit.

internal static class UnitTestGlobalSetup
{
    [System.Runtime.CompilerServices.ModuleInitializer]
    internal static void SetupDebounceMonitor() => DebounceMonitor.Disabled = true;
}

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How does it work?

When this.DebounceHere is called, the call time is mapped to its location (method name + line number) and target (this in this case).

On the next call, the time is compared to the stored one. If the interval has not yet passed, then the call is meant to be debounced.

The debounce target (reference) is held weakly, so no memory leaks are caused.

License

This project is licensed under the MIT license - see the LICENSE file for details.