forked from lxm_flutter/FlutterUnit
初步优化项目结构
This commit is contained in:
toly
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import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020-04-12
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 331,
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// "name": 'SliderTheme使用',
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// "priority": 1,
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// "subtitle":
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// "可通过SliderTheme.of获取Slider主题数据对象，其中包含大量属性用于对Slider的设定。"
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// "可以为ButtonTheme【后代】的按钮组件设置默认样式，包括颜色、形状、尺寸等。",
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// }
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class SliderThemeDemo extends StatefulWidget {
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@override
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_SliderThemeDemoState createState() => _SliderThemeDemoState();
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}
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class _SliderThemeDemoState extends State<SliderThemeDemo> {
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var _bliss = 0.5;
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@override
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Widget build(BuildContext context) {
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return SliderTheme(
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data: SliderTheme.of(context).copyWith(activeTrackColor: Colors.orange),
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child: Slider(
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min: 0.0,
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max: 200.0,
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divisions: 10,
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label: "${_bliss.toStringAsFixed(1)}",
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onChanged: (double value) {
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setState(() {
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_bliss = value;
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});
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},
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value: _bliss,
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),
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);
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}
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}
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179
lib/widget_system/widgets/ProxyWidget/SliderTheme/node2_diy.dart
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179
lib/widget_system/widgets/ProxyWidget/SliderTheme/node2_diy.dart
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import 'dart:math';
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import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020-04-12
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 331,
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// "name": 'SliderTheme对Slider的样式定制',
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// "priority": 2,
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// "subtitle":
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// "通过thumbShape和valueIndicatorShape可以对Slider进行样式定制。"
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// "注: 本例参考flutter-gallery中的SlideDemo",
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// }
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class DIYSliderTheme extends StatefulWidget {
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@override
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_DIYSliderThemeState createState() => _DIYSliderThemeState();
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}
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class _DIYSliderThemeState extends State<DIYSliderTheme> {
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var _bliss = 0.5;
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@override
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Widget build(BuildContext context) {
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final ThemeData theme = Theme.of(context);
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return SliderTheme(
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data: theme.sliderTheme.copyWith(
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activeTrackColor: Colors.deepPurple,
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inactiveTrackColor: Colors.blue.withAlpha(55),
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activeTickMarkColor: theme.colorScheme.onSurface.withOpacity(0.7),
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inactiveTickMarkColor: theme.colorScheme.surface.withOpacity(0.7),
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overlayColor: theme.colorScheme.onSurface.withOpacity(0.12),
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thumbColor: Colors.deepPurple,
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valueIndicatorColor: Colors.deepPurpleAccent,
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thumbShape: _CustomThumbShape(),
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valueIndicatorShape: _CustomValueIndicatorShape(),
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valueIndicatorTextStyle: theme.accentTextTheme.bodyText2!
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.copyWith(color: theme.colorScheme.onSurface),
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),
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child: Slider(
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min: 0.0,
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max: 200.0,
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divisions: 10,
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label: "${_bliss.toStringAsFixed(1)}",
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onChanged: (double value) {
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setState(() {
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_bliss = value;
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});
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},
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value: _bliss,
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),
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);
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}
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}
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class _CustomThumbShape extends SliderComponentShape {
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static const double _thumbSize = 4.0;
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static const double _disabledThumbSize = 3.0;
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@override
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Size getPreferredSize(bool isEnabled, bool isDiscrete) {
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return isEnabled
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? const Size.fromRadius(_thumbSize)
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: const Size.fromRadius(_disabledThumbSize);
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}
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static final Animatable<double> sizeTween = Tween<double>(
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begin: _disabledThumbSize,
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end: _thumbSize,
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);
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@override
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void paint(PaintingContext context, Offset center,
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{required Animation<double> activationAnimation,
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required Animation<double> enableAnimation,
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required bool isDiscrete,
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required TextPainter labelPainter,
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required RenderBox parentBox,
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required SliderThemeData sliderTheme,
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required TextDirection textDirection,
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required double value,
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required double textScaleFactor,
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required Size sizeWithOverflow}) {
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final Canvas canvas = context.canvas;
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final ColorTween colorTween = ColorTween(
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begin: sliderTheme.disabledThumbColor,
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end: sliderTheme.thumbColor,
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);
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final double size = _thumbSize * sizeTween.evaluate(enableAnimation);
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final Path thumbPath = _downTriangle(size, center);
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canvas.drawPath(thumbPath,
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Paint()..color = colorTween.evaluate(enableAnimation) ?? Colors.blue);
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}
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}
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Path _upTriangle(double size, Offset thumbCenter) =>
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_downTriangle(size, thumbCenter, invert: true);
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Path _downTriangle(double size, Offset thumbCenter, {bool invert = false}) {
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final Path thumbPath = Path();
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final double height = sqrt(3.0) / 2.0;
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final double centerHeight = size * height / 3.0;
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final double halfSize = size / 2.0;
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final double sign = invert ? -1.0 : 1.0;
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thumbPath.moveTo(
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thumbCenter.dx - halfSize, thumbCenter.dy + sign * centerHeight);
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thumbPath.lineTo(thumbCenter.dx, thumbCenter.dy - 2.0 * sign * centerHeight);
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thumbPath.lineTo(
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thumbCenter.dx + halfSize, thumbCenter.dy + sign * centerHeight);
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thumbPath.close();
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return thumbPath;
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}
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class _CustomValueIndicatorShape extends SliderComponentShape {
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static const double _indicatorSize = 4.0;
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static const double _disabledIndicatorSize = 3.0;
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static const double _slideUpHeight = 30.0;
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@override
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Size getPreferredSize(bool isEnabled, bool isDiscrete) {
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return Size.fromRadius(isEnabled ? _indicatorSize : _disabledIndicatorSize);
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}
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static final Animatable<double> sizeTween = Tween<double>(
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begin: _disabledIndicatorSize,
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end: _indicatorSize,
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);
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@override
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void paint(PaintingContext context, Offset center,
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{required Animation<double> activationAnimation,
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required Animation<double> enableAnimation,
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required bool isDiscrete,
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required TextPainter labelPainter,
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required RenderBox parentBox,
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required SliderThemeData sliderTheme,
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required TextDirection textDirection,
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required double value,
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required double textScaleFactor,
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required Size sizeWithOverflow}) {
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final Canvas canvas = context.canvas;
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final ColorTween enableColor = ColorTween(
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begin: sliderTheme.disabledThumbColor,
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end: sliderTheme.valueIndicatorColor,
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);
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final Tween<double> slideUpTween = Tween<double>(
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begin: 0.0,
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end: _slideUpHeight,
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);
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final double size = _indicatorSize * sizeTween.evaluate(enableAnimation);
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final Offset slideUpOffset =
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Offset(0.0, -slideUpTween.evaluate(activationAnimation));
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final Path thumbPath = _upTriangle(size, center + slideUpOffset);
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final Color paintColor = enableColor
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.evaluate(enableAnimation)
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?.withAlpha((255.0 * activationAnimation.value).round()) ??
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Colors.black;
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canvas.drawPath(
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thumbPath,
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Paint()..color = paintColor,
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);
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canvas.drawLine(
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center,
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center + slideUpOffset,
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Paint()
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..color = paintColor
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..style = PaintingStyle.stroke
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..strokeWidth = 2.0);
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labelPainter.paint(
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canvas,
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center +
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slideUpOffset +
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Offset(-labelPainter.width / 2.0, -labelPainter.height - 4.0));
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}
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}
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