663 lines
20 KiB
Dart
663 lines
20 KiB
Dart
//Forked from https://github.com/cdharris/flutter_duration_picker
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//Copyright https://github.com/cdharris
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//License MIT https://github.com/cdharris/flutter_duration_picker/blob/master/LICENSE
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import 'dart:async';
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import 'dart:math' as math;
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import 'package:flutter/material.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/widgets.dart';
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const Duration _kDialAnimateDuration = const Duration(milliseconds: 200);
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const double _kDurationPickerWidthPortrait = 328.0;
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const double _kDurationPickerWidthLandscape = 512.0;
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const double _kDurationPickerHeightPortrait = 380.0;
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const double _kDurationPickerHeightLandscape = 304.0;
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const double _kTwoPi = 2 * math.pi;
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const double _kPiByTwo = math.pi / 2;
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const double _kCircleTop = _kPiByTwo;
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class _DialPainter extends CustomPainter {
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const _DialPainter({
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@required this.context,
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@required this.labels,
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@required this.backgroundColor,
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@required this.accentColor,
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@required this.theta,
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@required this.textDirection,
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@required this.selectedValue,
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@required this.pct,
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@required this.multiplier,
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@required this.secondHand,
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});
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final List<TextPainter> labels;
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final Color backgroundColor;
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final Color accentColor;
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final double theta;
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final TextDirection textDirection;
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final int selectedValue;
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final BuildContext context;
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final double pct;
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final int multiplier;
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final int secondHand;
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@override
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void paint(Canvas canvas, Size size) {
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const double _epsilon = .001;
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const double _sweep = _kTwoPi - _epsilon;
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const double _startAngle = -math.pi / 2.0;
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final double radius = size.shortestSide / 2.0;
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final Offset center = new Offset(size.width / 2.0, size.height / 2.0);
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final Offset centerPoint = center;
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double pctTheta = (0.25 - (theta % _kTwoPi) / _kTwoPi) % 1.0;
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// Draw the background outer ring
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canvas.drawCircle(
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centerPoint, radius, new Paint()..color = backgroundColor);
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// Draw a translucent circle for every hour
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for (int i = 0; i < multiplier; i = i + 1) {
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canvas.drawCircle(centerPoint, radius,
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new Paint()..color = accentColor.withOpacity((i == 0) ? 0.3 : 0.1));
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}
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// Draw the inner background circle
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canvas.drawCircle(centerPoint, radius * 0.88,
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new Paint()..color = Theme.of(context).canvasColor);
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// Get the offset point for an angle value of theta, and a distance of _radius
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Offset getOffsetForTheta(double theta, double _radius) {
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return center +
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new Offset(_radius * math.cos(theta), -_radius * math.sin(theta));
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}
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// Draw the handle that is used to drag and to indicate the position around the circle
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final Paint handlePaint = new Paint()..color = accentColor;
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final Offset handlePoint = getOffsetForTheta(theta, radius - 10.0);
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canvas.drawCircle(handlePoint, 20.0, handlePaint);
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// Draw the Text in the center of the circle which displays hours and mins
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String minutes = (multiplier == 0) ? '' : "${multiplier}min ";
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// int minutes = (pctTheta * 60).round();
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// minutes = minutes == 60 ? 0 : minutes;
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String seconds = "$secondHand";
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TextPainter textDurationValuePainter = new TextPainter(
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textAlign: TextAlign.center,
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text: new TextSpan(
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text: '$minutes$seconds',
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style: Theme.of(context)
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.textTheme
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.headline4
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.copyWith(fontSize: size.shortestSide * 0.15)),
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textDirection: TextDirection.ltr)
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..layout();
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Offset middleForValueText = new Offset(
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centerPoint.dx - (textDurationValuePainter.width / 2),
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centerPoint.dy - textDurationValuePainter.height / 2);
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textDurationValuePainter.paint(canvas, middleForValueText);
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TextPainter textMinPainter = new TextPainter(
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textAlign: TextAlign.center,
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text: new TextSpan(
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text: 'sec', //th: ${theta}',
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style: Theme.of(context).textTheme.bodyText1),
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textDirection: TextDirection.ltr)
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..layout();
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textMinPainter.paint(
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canvas,
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new Offset(
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centerPoint.dx - (textMinPainter.width / 2),
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centerPoint.dy +
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(textDurationValuePainter.height / 2) -
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textMinPainter.height / 2));
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// Draw an arc around the circle for the amount of the circle that has elapsed.
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var elapsedPainter = new Paint()
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..style = PaintingStyle.stroke
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..strokeCap = StrokeCap.round
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..color = accentColor.withOpacity(0.3)
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..isAntiAlias = true
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..strokeWidth = radius * 0.12;
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canvas.drawArc(
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new Rect.fromCircle(
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center: centerPoint,
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radius: radius - radius * 0.12 / 2,
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),
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_startAngle,
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_sweep * pctTheta,
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false,
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elapsedPainter,
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);
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// Paint the labels (the minute strings)
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void paintLabels(List<TextPainter> labels) {
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if (labels == null) return;
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final double labelThetaIncrement = -_kTwoPi / labels.length;
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double labelTheta = _kPiByTwo;
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for (TextPainter label in labels) {
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final Offset labelOffset =
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new Offset(-label.width / 2.0, -label.height / 2.0);
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label.paint(
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canvas, getOffsetForTheta(labelTheta, radius - 40.0) + labelOffset);
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labelTheta += labelThetaIncrement;
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}
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}
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paintLabels(labels);
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}
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@override
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bool shouldRepaint(_DialPainter oldPainter) {
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return oldPainter.labels != labels ||
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oldPainter.backgroundColor != backgroundColor ||
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oldPainter.accentColor != accentColor ||
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oldPainter.theta != theta;
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}
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}
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class _Dial extends StatefulWidget {
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const _Dial(
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{@required this.duration,
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@required this.onChanged,
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this.snapToMins = 1.0})
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: assert(duration != null);
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final Duration duration;
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final ValueChanged<Duration> onChanged;
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/// The resolution of mins of the dial, i.e. if snapToMins = 5.0, only durations of 5min intervals will be selectable.
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final double snapToMins;
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@override
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_DialState createState() => new _DialState();
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}
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class _DialState extends State<_Dial> with SingleTickerProviderStateMixin {
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@override
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void initState() {
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super.initState();
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_thetaController = new AnimationController(
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duration: _kDialAnimateDuration,
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vsync: this,
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);
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_thetaTween =
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new Tween<double>(begin: _getThetaForDuration(widget.duration));
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_theta = _thetaTween.animate(new CurvedAnimation(
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parent: _thetaController, curve: Curves.fastOutSlowIn))
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..addListener(() => setState(() {}));
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_thetaController.addStatusListener((status) {
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// if (status == AnimationStatus.completed && _hours != _snappedHours) {
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// _hours = _snappedHours;
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if (status == AnimationStatus.completed) {
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_minutes = _minuteHand(_turningAngle);
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_seconds = _secondHand(_turningAngle);
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setState(() {});
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}
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});
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// _hours = widget.duration.inHours;
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_turningAngle = _kPiByTwo - widget.duration.inSeconds / 60.0 * _kTwoPi;
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_minutes = _minuteHand(_turningAngle);
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_seconds = _secondHand(_turningAngle);
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}
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ThemeData themeData;
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MaterialLocalizations localizations;
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MediaQueryData media;
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@override
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void didChangeDependencies() {
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super.didChangeDependencies();
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assert(debugCheckHasMediaQuery(context));
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themeData = Theme.of(context);
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localizations = MaterialLocalizations.of(context);
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media = MediaQuery.of(context);
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}
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@override
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void dispose() {
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_thetaController.dispose();
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super.dispose();
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}
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Tween<double> _thetaTween;
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Animation<double> _theta;
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AnimationController _thetaController;
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double _pct = 0.0;
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int _seconds = 0;
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bool _dragging = false;
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int _minutes = 0;
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double _turningAngle = 0.0;
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static double _nearest(double target, double a, double b) {
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return ((target - a).abs() < (target - b).abs()) ? a : b;
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}
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void _animateTo(double targetTheta) {
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final double currentTheta = _theta.value;
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double beginTheta =
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_nearest(targetTheta, currentTheta, currentTheta + _kTwoPi);
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beginTheta = _nearest(targetTheta, beginTheta, currentTheta - _kTwoPi);
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_thetaTween
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..begin = beginTheta
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..end = targetTheta;
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_thetaController
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..value = 0.0
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..forward();
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}
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double _getThetaForDuration(Duration duration) {
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return (_kPiByTwo - (duration.inSeconds % 60) / 60.0 * _kTwoPi) % _kTwoPi;
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}
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Duration _getTimeForTheta(double theta) {
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return _angleToDuration(_turningAngle);
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}
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Duration _notifyOnChangedIfNeeded() {
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// final Duration current = _getTimeForTheta(_theta.value);
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// var d = Duration(hours: _hours, minutes: current.inMinutes % 60);
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_minutes = _minuteHand(_turningAngle);
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_seconds = _secondHand(_turningAngle);
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var d = _angleToDuration(_turningAngle);
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widget.onChanged(d);
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return d;
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}
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void _updateThetaForPan() {
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setState(() {
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final Offset offset = _position - _center;
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final double angle =
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(math.atan2(offset.dx, offset.dy) - _kPiByTwo) % _kTwoPi;
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// Stop accidental abrupt pans from making the dial seem like it starts from 1h.
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// (happens when wanting to pan from 0 clockwise, but when doing so quickly, one actually pans from before 0 (e.g. setting the duration to 59mins, and then crossing 0, which would then mean 1h 1min).
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if (angle >= _kCircleTop &&
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_theta.value <= _kCircleTop &&
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_theta.value >= 0.1 && // to allow the radians sign change at 15mins.
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_minutes == 0) return;
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_thetaTween
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..begin = angle
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..end = angle;
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});
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}
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Offset _position;
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Offset _center;
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void _handlePanStart(DragStartDetails details) {
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assert(!_dragging);
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_dragging = true;
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final RenderBox box = context.findRenderObject();
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_position = box.globalToLocal(details.globalPosition);
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_center = box.size.center(Offset.zero);
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//_updateThetaForPan();
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_notifyOnChangedIfNeeded();
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}
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void _handlePanUpdate(DragUpdateDetails details) {
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double oldTheta = _theta.value;
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_position += details.delta;
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_updateThetaForPan();
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double newTheta = _theta.value;
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// _updateRotations(oldTheta, newTheta);
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_updateTurningAngle(oldTheta, newTheta);
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_notifyOnChangedIfNeeded();
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}
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int _minuteHand(double angle) {
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return _angleToDuration(angle).inMinutes.toInt();
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}
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int _secondHand(double angle) {
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// Result is in [0; 59], even if overall time is >= 1 hour
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return (_angleToSeconds(angle) % 60.0).toInt();
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}
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Duration _angleToDuration(double angle) {
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return _secondToDuration(_angleToSeconds(angle));
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}
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Duration _secondToDuration(seconds) {
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return Duration(
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minutes: (seconds ~/ 60).toInt(), seconds: (seconds % 60.0).toInt());
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}
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double _angleToSeconds(double angle) {
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// Coordinate transformation from mathematical COS to dial COS
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double dialAngle = _kPiByTwo - angle;
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// Turn dial angle into minutes, may go beyond 60 minutes (multiple turns)
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return dialAngle / _kTwoPi * 60.0;
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}
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void _updateTurningAngle(double oldTheta, double newTheta) {
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// Register any angle by which the user has turned the dial.
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//
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// The resulting turning angle fully captures the state of the dial,
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// including multiple turns (= full hours). The [_turningAngle] is in
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// mathematical coordinate system, i.e. 3-o-clock position being zero, and
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// increasing counter clock wise.
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// From positive to negative (in mathematical COS)
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if (newTheta > 1.5 * math.pi && oldTheta < 0.5 * math.pi) {
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_turningAngle = _turningAngle - ((_kTwoPi - newTheta) + oldTheta);
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}
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// From negative to positive (in mathematical COS)
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else if (newTheta < 0.5 * math.pi && oldTheta > 1.5 * math.pi) {
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_turningAngle = _turningAngle + ((_kTwoPi - oldTheta) + newTheta);
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} else {
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_turningAngle = _turningAngle + (newTheta - oldTheta);
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}
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}
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void _handlePanEnd(DragEndDetails details) {
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assert(_dragging);
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_dragging = false;
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_position = null;
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_center = null;
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//_notifyOnChangedIfNeeded();
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//_animateTo(_getThetaForDuration(widget.duration));
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}
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void _handleTapUp(TapUpDetails details) {
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final RenderBox box = context.findRenderObject();
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_position = box.globalToLocal(details.globalPosition);
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_center = box.size.center(Offset.zero);
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_updateThetaForPan();
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_notifyOnChangedIfNeeded();
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_animateTo(_getThetaForDuration(_getTimeForTheta(_theta.value)));
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_dragging = false;
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_position = null;
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_center = null;
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}
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List<TextPainter> _buildSeconds(TextTheme textTheme) {
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final TextStyle style = textTheme.subtitle1;
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const List<Duration> _secondsMarkerValues = const <Duration>[
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const Duration(seconds: 0),
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const Duration(seconds: 5),
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const Duration(seconds: 10),
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const Duration(seconds: 15),
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const Duration(seconds: 20),
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const Duration(seconds: 25),
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const Duration(seconds: 30),
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const Duration(seconds: 35),
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const Duration(seconds: 40),
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const Duration(seconds: 45),
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const Duration(seconds: 50),
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const Duration(seconds: 55),
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];
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final List<TextPainter> labels = <TextPainter>[];
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for (Duration duration in _secondsMarkerValues) {
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var painter = new TextPainter(
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text: new TextSpan(style: style, text: duration.inSeconds.toString()),
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textDirection: TextDirection.ltr,
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)..layout();
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labels.add(painter);
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}
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return labels;
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}
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@override
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Widget build(BuildContext context) {
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Color backgroundColor;
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switch (themeData.brightness) {
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case Brightness.light:
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backgroundColor = Colors.grey[200];
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break;
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case Brightness.dark:
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backgroundColor = themeData.backgroundColor;
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break;
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}
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final ThemeData theme = Theme.of(context);
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int selectedDialValue;
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_minutes = _minuteHand(_turningAngle);
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_seconds = _secondHand(_turningAngle);
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return new GestureDetector(
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excludeFromSemantics: true,
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onPanStart: _handlePanStart,
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onPanUpdate: _handlePanUpdate,
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onPanEnd: _handlePanEnd,
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onTapUp: _handleTapUp,
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child: new CustomPaint(
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painter: new _DialPainter(
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pct: _pct,
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multiplier: _minutes,
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secondHand: _seconds,
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context: context,
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selectedValue: selectedDialValue,
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labels: _buildSeconds(theme.textTheme),
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backgroundColor: backgroundColor,
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accentColor: themeData.accentColor,
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theta: _theta.value,
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textDirection: Directionality.of(context),
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),
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));
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}
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}
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/// A duration picker designed to appear inside a popup dialog.
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///
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/// Pass this widget to [showDialog]. The value returned by [showDialog] is the
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/// selected [Duration] if the user taps the "OK" button, or null if the user
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/// taps the "CANCEL" button. The selected time is reported by calling
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/// [Navigator.pop].
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class _DurationPickerDialog extends StatefulWidget {
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/// Creates a duration picker.
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///
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/// [initialTime] must not be null.
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const _DurationPickerDialog(
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{Key key, @required this.initialTime, this.snapToMins})
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: assert(initialTime != null),
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super(key: key);
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/// The duration initially selected when the dialog is shown.
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final Duration initialTime;
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final double snapToMins;
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@override
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_DurationPickerDialogState createState() => new _DurationPickerDialogState();
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}
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class _DurationPickerDialogState extends State<_DurationPickerDialog> {
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@override
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void initState() {
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super.initState();
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_selectedDuration = widget.initialTime;
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}
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@override
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void didChangeDependencies() {
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super.didChangeDependencies();
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localizations = MaterialLocalizations.of(context);
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}
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Duration get selectedDuration => _selectedDuration;
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Duration _selectedDuration;
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MaterialLocalizations localizations;
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void _handleTimeChanged(Duration value) {
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setState(() {
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_selectedDuration = value;
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});
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}
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void _handleCancel() {
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Navigator.pop(context);
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}
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void _handleOk() {
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Navigator.pop(context, _selectedDuration);
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}
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@override
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Widget build(BuildContext context) {
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assert(debugCheckHasMediaQuery(context));
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final ThemeData theme = Theme.of(context);
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final Widget picker = new Padding(
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padding: const EdgeInsets.all(16.0),
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child: new AspectRatio(
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aspectRatio: 1.0,
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child: new _Dial(
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duration: _selectedDuration,
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onChanged: _handleTimeChanged,
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snapToMins: widget.snapToMins,
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)));
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final Widget actions = ButtonBar(children: <Widget>[
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new FlatButton(
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child: new Text(localizations.cancelButtonLabel),
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onPressed: _handleCancel),
|
|
new FlatButton(
|
|
child: new Text(localizations.okButtonLabel), onPressed: _handleOk),
|
|
]);
|
|
|
|
final Dialog dialog = new Dialog(child: new OrientationBuilder(
|
|
builder: (BuildContext context, Orientation orientation) {
|
|
final Widget pickerAndActions = new Container(
|
|
color: theme.dialogBackgroundColor,
|
|
child: new Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
children: <Widget>[
|
|
new Expanded(
|
|
child:
|
|
picker), // picker grows and shrinks with the available space
|
|
actions,
|
|
],
|
|
),
|
|
);
|
|
|
|
assert(orientation != null);
|
|
switch (orientation) {
|
|
case Orientation.portrait:
|
|
return new SizedBox(
|
|
width: _kDurationPickerWidthPortrait,
|
|
height: _kDurationPickerHeightPortrait,
|
|
child: new Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
|
children: <Widget>[
|
|
new Expanded(
|
|
child: pickerAndActions,
|
|
),
|
|
]));
|
|
case Orientation.landscape:
|
|
return new SizedBox(
|
|
width: _kDurationPickerWidthLandscape,
|
|
height: _kDurationPickerHeightLandscape,
|
|
child: new Row(
|
|
mainAxisSize: MainAxisSize.min,
|
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
|
children: <Widget>[
|
|
new Flexible(
|
|
child: pickerAndActions,
|
|
),
|
|
]));
|
|
}
|
|
return null;
|
|
}));
|
|
|
|
return new Theme(
|
|
data: theme.copyWith(
|
|
dialogBackgroundColor: Colors.transparent,
|
|
),
|
|
child: dialog,
|
|
);
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
super.dispose();
|
|
}
|
|
}
|
|
|
|
/// Shows a dialog containing the duration picker.
|
|
///
|
|
/// The returned Future resolves to the duration selected by the user when the user
|
|
/// closes the dialog. If the user cancels the dialog, null is returned.
|
|
///
|
|
/// To show a dialog with [initialTime] equal to the current time:
|
|
///
|
|
/// ```dart
|
|
/// showDurationPicker(
|
|
/// initialTime: new Duration.now(),
|
|
/// context: context,
|
|
/// );
|
|
/// ```
|
|
Future<Duration> showDurationPicker(
|
|
{@required BuildContext context,
|
|
@required Duration initialTime,
|
|
double snapToMins}) async {
|
|
assert(context != null);
|
|
assert(initialTime != null);
|
|
|
|
return await showDialog<Duration>(
|
|
context: context,
|
|
builder: (BuildContext context) => new _DurationPickerDialog(
|
|
initialTime: initialTime, snapToMins: snapToMins),
|
|
);
|
|
}
|
|
|
|
class DurationPicker extends StatelessWidget {
|
|
final Duration duration;
|
|
final ValueChanged<Duration> onChange;
|
|
final double snapToMins;
|
|
|
|
final double width;
|
|
final double height;
|
|
|
|
DurationPicker(
|
|
{this.duration = const Duration(minutes: 0),
|
|
@required this.onChange,
|
|
this.snapToMins,
|
|
this.width,
|
|
this.height});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return SizedBox(
|
|
width: width ?? _kDurationPickerWidthPortrait / 1.5,
|
|
height: height ?? _kDurationPickerHeightPortrait / 1.5,
|
|
child: Column(
|
|
mainAxisSize: MainAxisSize.min,
|
|
crossAxisAlignment: CrossAxisAlignment.stretch,
|
|
children: <Widget>[
|
|
Expanded(
|
|
child: _Dial(
|
|
duration: duration,
|
|
onChanged: onChange,
|
|
snapToMins: snapToMins,
|
|
),
|
|
),
|
|
]));
|
|
}
|
|
}
|