71 lines
1.6 KiB
Dart
71 lines
1.6 KiB
Dart
import 'package:flutter/material.dart';
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enum SlideDirection { up, down }
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class SlideHide extends StatefulWidget {
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final Widget child;
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final bool hide; // 是否隐藏
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final SlideDirection direction;
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final Duration duration;
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const SlideHide({
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super.key,
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required this.child,
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this.hide = false,
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this.direction = SlideDirection.up,
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this.duration = const Duration(milliseconds: 200),
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});
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@override
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State<SlideHide> createState() => _SlideHideState();
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}
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class _SlideHideState extends State<SlideHide> with SingleTickerProviderStateMixin {
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late final AnimationController _controller;
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late final Animation<Offset> _animation;
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@override
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void initState() {
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super.initState();
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_controller = AnimationController(
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vsync: this,
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duration: widget.duration,
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);
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_animation = Tween<Offset>(
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begin: Offset.zero,
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end: widget.direction == SlideDirection.up ? const Offset(0, -1) : const Offset(0, 1),
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).animate(CurvedAnimation(parent: _controller, curve: Curves.easeInOut));
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if (widget.hide) {
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_controller.value = 1;
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}
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}
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@override
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void didUpdateWidget(covariant SlideHide oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.hide != widget.hide) {
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if (widget.hide) {
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_controller.forward();
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} else {
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_controller.reverse();
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}
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}
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return SlideTransition(
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position: _animation,
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child: widget.child,
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);
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}
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}
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