Merge pull request #4 from hackware1993/milestone_pinned_position

Milestone pinned position

Author: hackware1993

CHANGELOG.md

@@ -1,3 +1,7 @@
+# v1.1.0-alpha
+
+add pinned position support.
+
 # v1.0.7-stable
 
 optimize key set.

README.md

@@ -136,13 +136,14 @@ two-way constraints, such as chains(not yet supported, please use with Flex).
 16. staggered grid、grid、list(list is a special staggered grid, grid is also a special staggered
     grid)
 17. circle position
-18. e-index(event dispatch order, default is z-index)
-19. the size of child widgets can be set to:
+18. pinned position
+19. e-index(event dispatch order, default is z-index)
+20. the size of child widgets can be set to:
     1. fixed size(>=0)
     2. matchParent
     3. wrapContent(default, minimum and maximum supported)
     4. matchConstraint
-20. the size of itself can be set to:
+21. the size of itself can be set to:
     1. fixed size(>=0)
     2. matchParent(default)
     3. wrapContent(minimum and maximum are temporarily not supported)
@@ -171,12 +172,12 @@ dependencies:
   flutter_constraintlayout:
     git:
       url: 'https://github.com/hackware1993/Flutter-ConstraintLayout.git'
-      ref: 'v1.0.7-stable'
+      ref: 'v1.1.0-alpha'
 ```
 
 ```yaml
 dependencies:
-  flutter_constraintlayout: ^1.0.7-stable
+  flutter_constraintlayout: ^1.1.0-alpha
 ```
 
 ```dart

README_CN.md

@@ -110,13 +110,14 @@ build 耗时有时甚至超过渲染耗时。
     27. centerBottomRightTo
 16. 瀑布流、网格、列表（列表是一个特殊的瀑布流，网格也是一个特殊的瀑布流）
 17. 圆形定位
-18. e-index（事件分发顺序，默认是 z-index，一般用来处理点击区域）
-19. 子元素的大小可以被设置为：
+18. 图钉定位
+19. e-index（事件分发顺序，默认是 z-index，一般用来处理点击区域）
+20. 子元素的大小可以被设置为：
     1. 固定大小（>=0）
     2. matchParent
     3. wrapContent（默认值，支持最大、最小设置）
     4. matchConstraint
-20. 自身的大小可以被设置为：
+21. 自身的大小可以被设置为：
     1. 固定大小（>=0）
     2. matchParent（default）
     3. wrapContent（暂不支持最大、最小设置）
@@ -145,12 +146,12 @@ dependencies:
   flutter_constraintlayout:
     git:
       url: 'https://github.com/hackware1993/Flutter-ConstraintLayout.git'
-      ref: 'v1.0.7-stable'
+      ref: 'v1.1.0-alpha'
 ```
 
 ```yaml
 dependencies:
-  flutter_constraintlayout: ^1.0.7-stable
+  flutter_constraintlayout: ^1.1.0-alpha
 ```
 
 ```dart

example/home.dart

@@ -13,6 +13,7 @@ import 'guideline.dart';
 import 'horizontal_list.dart';
 import 'margin.dart';
 import 'percentage_layout.dart';
+import 'pinned_position.dart';
 import 'relative_id.dart';
 import 'self_wrap_content.dart';
 import 'staggered_grid.dart';
@@ -38,6 +39,7 @@ class ExampleHome extends StatelessWidget {
     'Vertical List': const VerticalListExample(),
     'Staggered Grid': const StaggeredGridExample(),
     'Circle Position': const CirclePositionExample(),
+    'Pinned Position': const PinnedPositionExample(),
     'Self wrapContent': const SelfWrapContentExample(),
     'Margin': const MarginExample(),
     'Charts': const ChartsExample(),

example/pinned_position.dart

@@ -0,0 +1,41 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_constraintlayout/src/constraint_layout.dart';
+
+import 'custom_app_bar.dart';
+
+class PinnedPositionExample extends StatelessWidget {
+  const PinnedPositionExample({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    ConstraintId anchor = ConstraintId('anchor');
+    return Scaffold(
+      appBar: const CustomAppBar(
+        title: 'Pinned Position',
+        codePath: 'example/pinned_position.dart',
+      ),
+      body: ConstraintLayout(
+        children: [
+          Container(
+            color: Colors.yellow,
+          ).applyConstraint(
+            id: anchor,
+            size: 200,
+            centerTo: parent,
+          ),
+          Container(
+            color: Colors.cyan,
+          ).applyConstraint(
+            size: 40,
+            pinnedInfo: PinnedInfo(
+              anchor,
+              PinnedPos(0, PinnedType.absolute, 0.5, PinnedType.percent),
+              PinnedPos(0.5, PinnedType.percent, 0.5, PinnedType.percent),
+              rotateDegree: 45,
+            ),
+          )
+        ],
+      ),
+    );
+  }
+}