36 lines
897 B
Dart
36 lines
897 B
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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class Throttler {
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Throttler(this.interval);
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final Duration interval;
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VoidCallback? _action;
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Timer? _timer;
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void call(VoidCallback action, {bool immediateCall = true}) {
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// Let the latest action override whatever was there before
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_action = action;
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// If no timer is running, we want to start one
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if (_timer == null) {
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// If immediateCall is true, we handle the action now
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if (immediateCall) {
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_callAction();
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}
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// Start a timer that will temporarily throttle subsequent calls, and eventually make a call to whatever _action is (if anything)
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_timer = Timer(interval, _callAction);
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}
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}
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void _callAction() {
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_action?.call(); // If we have an action queued up, complete it.
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_timer = null;
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}
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void reset() {
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_action = null;
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_timer = null;
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}
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}
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