aryzhov/flutter-timer-builder
A Flutter widget that rebuilds itself on scheduled, periodic, or dynamically generated time events.
前往 github 下載TimerBuilder
A widget that rebuilds itself on scheduled, periodic, or
dynamically generated time events.
Here are some use cases for this widget:
- When showing time since or until a specified event;
- When the model updates frequently but you want to limit UI update frequency;
- When showing current date or time;
- When the representation a widget depends on a certain time event.
Examples
Periodic rebuild
import 'package:timer_builder/timer_builder.dart';
class ClockWidget extends StatelessWidget {
@override
Widget build(BuildContext context) {
return TimerBuilder.periodic(Duration(seconds: 1),
builder: (context) {
return Text("${DateTime.now()}");
}
);
}
}
Rebuild on a schedule
import 'package:timer_builder/timer_builder.dart';
class StatusIndicator extends StatelessWidget {
final DateTime startTime;
final DateTime endTime;
StatusIndicator(this.startTime, this.endTime);
@override
Widget build(BuildContext context) {
return TimerBuilder.scheduled([startTime, endTime],
builder: (context) {
final now = DateTime.now();
final started = now.compareTo(startTime) >= 0;
final ended = now.compareTo(endTime) >= 0;
return Text(started ? ended ? "Ended": "Started": "Not Started");
}
);
}
}
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