AI聊天界面添加多选分享，删除功能

lib/common/widgets/bottom_animation.dart

-
-
-import 'package:flutter/src/widgets/framework.dart';
-import 'package:flutter/widgets.dart';
-import 'package:get/get.dart';
-
-class BottomAnimation extends GetView {
-  const BottomAnimation(this.child, this.isExpanded, {Key? key}):super(key:key);
-  final Widget child;
-  final bool isExpanded;
-  @override
-  Widget build(BuildContext context) {
-    // TODO: implement build
-    return AnimatedAlign(
-          duration: Duration(milliseconds: 300),
-          alignment: isExpanded ? Alignment.bottomCenter : Alignment(0, 2),
-          child: Container(
-            child: child,
-          ),
-        );
-  }
-  
-}

lib/common/widgets/my_checkbox.dart

-
-import 'package:flutter/material.dart';
-
-class MyCheckbox extends StatefulWidget {
-  const MyCheckbox(this.onChanged, {Key? key}): super(key: key);
-  final void Function(bool isChecked)? onChanged;
-
-  @override
-  _MyCheckboxState createState() => _MyCheckboxState(onChanged);
-}
-
-class _MyCheckboxState extends State<MyCheckbox> {
-  _MyCheckboxState(this.onChanged): super();
-  bool _isChecked = false;
-  final void Function(bool isChecked)? onChanged;
-
-  @override
-  Widget build(BuildContext context) {
-    return InkWell(
-      onTap: () {
-        setState(() {
-          _isChecked = !_isChecked;
-          if (onChanged != null) {
-            onChanged!(_isChecked);
-          }
-        });
-      },
-      child: Container(
-        width: 20,
-        height: 20,
-        decoration: BoxDecoration(
-          color: _isChecked ? Colors.green : Colors.grey[300],
-          border: Border.all(
-            color: _isChecked ? Colors.green : Colors.grey[400]!,
-            width: 2,
-          ),
-          borderRadius: BorderRadius.circular(20),
-        ),
-        child: _isChecked
-            ? Icon(
-                Icons.check,
-                size: 16,
-                color: Colors.white,
-              )
-            : null,
-      ),
-    );
-  }
-}
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