first commit
This commit is contained in:
Zakaria
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import 'package:flutter/material.dart';
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import 'package:get_it/get_it.dart';
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import '../../services/music_player_background_task.dart';
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import '../../services/progress_state_stream.dart';
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import '../print_duration.dart';
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class ProgressSlider extends StatefulWidget {
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const ProgressSlider({
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Key? key,
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this.allowSeeking = true,
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this.showBuffer = true,
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this.showDuration = true,
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this.showPlaceholder = true,
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}) : super(key: key);
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final bool allowSeeking;
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final bool showBuffer;
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final bool showDuration;
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final bool showPlaceholder;
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@override
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State<ProgressSlider> createState() => _ProgressSliderState();
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}
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class _ProgressSliderState extends State<ProgressSlider> {
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/// Value used to hold the slider's value when dragging.
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double? _dragValue;
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late SliderThemeData _sliderThemeData;
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final _audioHandler = GetIt.instance<MusicPlayerBackgroundTask>();
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@override
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void didChangeDependencies() {
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super.didChangeDependencies();
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_sliderThemeData = SliderTheme.of(context).copyWith(
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trackHeight: 4.0,
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inactiveTrackColor:
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Theme.of(context).colorScheme.surfaceVariant.withOpacity(0.5),
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);
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}
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@override
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Widget build(BuildContext context) {
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// The slider always needs to be LTR, so we use Directionality to save
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// putting TextDirection.ltr all over the place
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return Directionality(
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textDirection: TextDirection.ltr,
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// The slider can refresh up to 60 times per second, so we wrap it in a
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// RepaintBoundary to avoid more areas being repainted than necessary
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child: RepaintBoundary(
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child: StreamBuilder<ProgressState>(
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stream: progressStateStream,
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builder: (context, snapshot) {
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if (snapshot.data?.mediaItem == null) {
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// If nothing is playing or the AudioService isn't connected, return a
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// greyed out slider with some fake numbers. We also do this if
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// currentPosition is null, which sometimes happens when the app is
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// closed and reopened.
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return widget.showPlaceholder
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? Column(
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children: [
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SliderTheme(
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data: _sliderThemeData.copyWith(
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trackShape: CustomTrackShape(),
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),
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child: const Slider(
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value: 0,
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max: 1,
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onChanged: null,
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),
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),
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if (widget.showDuration)
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Row(
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mainAxisSize: MainAxisSize.max,
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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"00:00",
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style: Theme.of(context)
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.textTheme
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.bodyMedium
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?.copyWith(
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color: Theme.of(context)
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.textTheme
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.bodySmall
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?.color),
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),
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Text(
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"00:00",
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style: Theme.of(context)
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.textTheme
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.bodyMedium
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?.copyWith(
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color: Theme.of(context)
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.textTheme
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.bodySmall
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?.color),
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),
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],
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),
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],
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)
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: const SizedBox.shrink();
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} else if (snapshot.hasData) {
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return Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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// Slider displaying playback and buffering progress.
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SliderTheme(
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data: widget.allowSeeking
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? _sliderThemeData.copyWith(
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trackShape: CustomTrackShape(),
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)
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: _sliderThemeData.copyWith(
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thumbShape: const RoundSliderThumbShape(
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enabledThumbRadius: 0),
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// gets rid of both horizontal and vertical padding
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overlayShape:
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const RoundSliderOverlayShape(overlayRadius: 0),
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trackShape: const RectangularSliderTrackShape(),
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),
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child: Slider(
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min: 0.0,
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max: snapshot.data!.mediaItem?.duration == null
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? snapshot.data!.playbackState.bufferedPosition
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.inMicroseconds
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.toDouble()
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: snapshot.data!.mediaItem!.duration!.inMicroseconds
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.toDouble(),
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value: (_dragValue ??
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snapshot.data!.position.inMicroseconds)
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.clamp(
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0,
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snapshot.data!.mediaItem!.duration!.inMicroseconds
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.toDouble())
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.toDouble(),
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secondaryTrackValue: widget.showBuffer &&
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snapshot.data!.mediaItem
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?.extras?["downloadedSongJson"] ==
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null
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? snapshot.data!.playbackState.bufferedPosition
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.inMicroseconds
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.clamp(
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0.0,
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snapshot.data!.mediaItem!.duration == null
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? snapshot.data!.playbackState
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.bufferedPosition.inMicroseconds
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: snapshot.data!.mediaItem!.duration!
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.inMicroseconds,
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)
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.toDouble()
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: 0,
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onChanged: widget.allowSeeking
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? (newValue) async {
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// We don't actually tell audio_service to seek here
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// because it would get flooded with seek requests
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setState(() {
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_dragValue = newValue;
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});
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}
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: (_) {},
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onChangeStart: widget.allowSeeking
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? (value) {
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setState(() {
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_dragValue = value;
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});
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}
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: (_) {},
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onChangeEnd: widget.allowSeeking
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? (newValue) async {
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// Seek to the new position
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await _audioHandler.seek(
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Duration(microseconds: newValue.toInt()));
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// Clear drag value so that the slider uses the play
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// duration again.
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setState(() {
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_dragValue = null;
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});
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}
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: (_) {},
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),
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),
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if (widget.showDuration)
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Row(
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mainAxisSize: MainAxisSize.max,
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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printDuration(
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Duration(
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microseconds: _dragValue?.toInt() ??
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snapshot.data!.position.inMicroseconds),
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),
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style: Theme.of(context)
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.textTheme
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.bodyMedium
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?.copyWith(
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color: Theme.of(context)
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.textTheme
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.bodySmall
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?.color),
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),
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Text(
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printDuration(snapshot.data!.mediaItem?.duration),
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style: Theme.of(context)
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.textTheme
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.bodyMedium
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?.copyWith(
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color: Theme.of(context)
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.textTheme
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.bodySmall
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?.color),
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),
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],
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),
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],
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);
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} else {
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return const Text(
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"Snapshot doesn't have data and MediaItem isn't null and AudioService is connected?");
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}
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},
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),
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),
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);
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}
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}
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class PositionData {
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final Duration position;
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final Duration bufferedPosition;
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PositionData(this.position, this.bufferedPosition);
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}
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/// Track shape used to remove horizontal padding.
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/// https://github.com/flutter/flutter/issues/37057
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class CustomTrackShape extends RoundedRectSliderTrackShape {
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@override
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Rect getPreferredRect({
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required RenderBox parentBox,
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Offset offset = Offset.zero,
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required SliderThemeData sliderTheme,
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bool isEnabled = false,
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bool isDiscrete = false,
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}) {
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final double trackHeight = sliderTheme.trackHeight!;
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final double trackLeft = offset.dx;
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final double trackTop =
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offset.dy + (parentBox.size.height - trackHeight) / 2;
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final double trackWidth = parentBox.size.width;
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return Rect.fromLTWH(trackLeft, trackTop, trackWidth, trackHeight);
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}
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/// Disable additionalActiveTrackHeight
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@override
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void paint(
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PaintingContext context,
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Offset offset, {
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required RenderBox parentBox,
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required SliderThemeData sliderTheme,
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required Animation<double> enableAnimation,
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required TextDirection textDirection,
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required Offset thumbCenter,
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Offset? secondaryOffset,
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bool isDiscrete = false,
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bool isEnabled = false,
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double additionalActiveTrackHeight = 0,
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}) {
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super.paint(
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context,
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offset,
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parentBox: parentBox,
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sliderTheme: sliderTheme,
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enableAnimation: enableAnimation,
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textDirection: textDirection,
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thumbCenter: thumbCenter,
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secondaryOffset: secondaryOffset,
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isDiscrete: isDiscrete,
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isEnabled: isEnabled,
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additionalActiveTrackHeight: additionalActiveTrackHeight,
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);
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}
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}
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