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Add the customPaint,clip collection that you can custom your own shape.
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7 files changed

+201
-2
lines changed

7 files changed

+201
-2
lines changed

‎lib/const/page_item_const.dart‎

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@@ -287,4 +287,9 @@ const PAGE_ITEMS = [
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"img": PageImage.FLUTTER_OPEN,
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"click": PageName.ASYNC_STREAM_BUILDER,
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},
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{
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"title": PageName.PAINT_OPACITY,
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"img": PageImage.FLUTTER_OPEN,
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"click": PageName.PAINT_OPACITY,
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},
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];

‎lib/const/page_name_const.dart‎

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@@ -63,4 +63,5 @@ class PageName {
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static const INTER_NAV = "Navigator";
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static const ASYNC_FUTURE = "FutureBuilder";
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static const ASYNC_STREAM_BUILDER = "StreamBuilder";
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static const PAINT_OPACITY = "Opacity";
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}

‎lib/main.dart‎

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@@ -76,6 +76,7 @@ class FlutterOpenApp extends StatelessWidget {
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PageName.INTER_NAV: (context) => NavigatorPage(),
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PageName.ASYNC_FUTURE: (context) => FuturePage(),
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PageName.ASYNC_STREAM_BUILDER: (context) => StreamBuilderPage(),
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PageName.PAINT_OPACITY: (context) => PaintingPage(),
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},
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);
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}

‎lib/page/_page.dart‎

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@@ -38,3 +38,4 @@ export 'assets/_assets.dart';
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export 'anim/_anim.dart';
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export 'interation/_interaction.dart';
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export 'async/_async.dart';
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export 'painting/_painting.dart';

‎lib/page/interation/NavigatorPage.dart‎

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@@ -8,8 +8,6 @@ import 'package:flutter_widgets/const/_const.dart';
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import 'NavPage.dart';
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class NavigatorPage extends StatefulWidget {
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Key _key = GlobalKey<_NavigatorState>();
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@override
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_NavigatorState createState() => _NavigatorState();
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}

‎lib/page/painting/PaintingPage.dart‎

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///
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/// Created by NieBin on 2019/6/15
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/// Github: https://github.com/nb312
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/// Email: niebin312@gmail.com
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///
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import "package:flutter/material.dart";
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import 'package:flutter_widgets/const/_const.dart';
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import 'dart:math';
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class PaintingPage extends StatefulWidget {
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@override
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_OpacityState createState() => _OpacityState();
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}
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class _OpacityState extends State<PaintingPage> {
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Widget _opacity() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: Opacity(
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opacity: 0.7,
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child: Text(
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"Opacity",
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style: TextStyle(color: TEXT_BLACK),
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),
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),
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color: RED_LIGHT,
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);
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Widget _transform() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: Transform.rotate(
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angle: pi / 2,
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child: Center(
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child: Text("Transform"),
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),
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),
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color: BLUE_LIGHT,
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);
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Widget _decorated() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: DecoratedBox(
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position: DecorationPosition.foreground,
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decoration: ShapeDecoration(
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shape: StadiumBorder(
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side: BorderSide(color: TEXT_BLACK, width: 10),
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),
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),
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child: Container(
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color: PURPLE,
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child: Center(
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child: Text("DecoratedBox"),
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),
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)));
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Widget _fraction() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: FractionalTranslation(
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translation: Offset(0.3, 0.1),
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child: Container(
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color: BLUE_LIGHT,
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),
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),
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);
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Widget _rotation() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: RotatedBox(
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quarterTurns: 3,
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child: Container(
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color: GREEN,
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child: Center(
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child: Text("RotatedBox"),
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),
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),
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),
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);
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Widget _clipOval() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: ClipOval(
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clipper: MyClipper(),
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child: Container(
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color: RED_LIGHT,
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),
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),
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);
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Widget _clipPath() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: ClipPath(
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clipper: MPathClipper(),
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child: Container(color: PURPLE),
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),
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);
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Widget _clipRect() => Container(
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constraints: BoxConstraints.expand(height: 100),
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child: ClipRect(
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clipper: MyClipper(),
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child: Container(
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color: BLUE_DEEP,
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),
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),
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);
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Widget _custom() => Container(
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constraints: BoxConstraints.expand(height: 200),
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child: CustomPaint(
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painter: MCustomPainter(),
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child: Center(
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child: Text("CustomPaint"),
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),
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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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return Scaffold(
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appBar: AppBar(
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title: Text("Hello world"),
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),
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body: SingleChildScrollView(
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child: Column(
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children: <Widget>[
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_opacity(),
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_transform(),
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_decorated(),
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_fraction(),
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_rotation(),
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_clipOval(),
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_clipPath(),
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_clipRect(),
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_custom(),
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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 MCustomPainter extends CustomPainter {
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@override
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void paint(Canvas canvas, Size size) {
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canvas.drawCircle(
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Offset(size.width / 2, size.height / 2),
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100,
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Paint()
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..color = RED_LIGHT
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..isAntiAlias = true
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..strokeWidth = 10);
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}
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@override
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bool shouldRepaint(CustomPainter oldDelegate) {
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return true;
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}
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}
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class MPathClipper extends CustomClipper<Path> {
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@override
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Path getClip(Size size) {
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return Path()
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..moveTo(100.0, 50.0)
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..addArc(
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Rect.fromCenter(
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center: Offset(100.0, 50.0), height: 50.0, width: 50.0),
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0,
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pi / 2);
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}
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@override
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bool shouldReclip(CustomClipper<Path> oldClipper) {
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return true;
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}
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}
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class MyClipper extends CustomClipper<Rect> {
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@override
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Rect getClip(Size size) {
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return Rect.fromCenter(
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center: Offset(50.0, 50.0), height: 100.0, width: 50.0);
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}
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@override
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bool shouldReclip(CustomClipper<Rect> oldClipper) {
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return true;
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}
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}

‎lib/page/painting/_painting.dart‎

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///
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/// Created by NieBin on 2019/6/15
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/// Github: https://github.com/nb312
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/// Email: niebin312@gmail.com
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export "PaintingPage.dart";

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