46 lines
1.3 KiB
Dart
46 lines
1.3 KiB
Dart
import 'dart:ui';
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import 'package:flutter/material.dart';
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import 'package:flutter_circular_chart/src/tween.dart';
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class CircularChartSegment extends MergeTweenable<CircularChartSegment> {
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CircularChartSegment(this.rank, this.sweepAngle, this.color);
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final int rank;
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final double sweepAngle;
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final Color color;
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@override
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CircularChartSegment get empty => new CircularChartSegment(rank, 0.0, color);
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@override
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bool operator <(CircularChartSegment other) => rank < other.rank;
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@override
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Tween<CircularChartSegment> tweenTo(CircularChartSegment other) =>
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new CircularChartSegmentTween(this, other);
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static CircularChartSegment lerp(
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CircularChartSegment begin, CircularChartSegment end, double t) {
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assert(begin.rank == end.rank);
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return new CircularChartSegment(
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begin.rank,
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lerpDouble(begin.sweepAngle, end.sweepAngle, t),
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Color.lerp(begin.color, end.color, t),
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);
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}
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}
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class CircularChartSegmentTween extends Tween<CircularChartSegment> {
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CircularChartSegmentTween(
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CircularChartSegment begin, CircularChartSegment end)
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: super(begin: begin, end: end) {
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assert(begin.rank == end.rank);
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}
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@override
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CircularChartSegment lerp(double t) =>
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CircularChartSegment.lerp(begin, end, t);
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}
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