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168 行
5.6 KiB

using System;
using Unity.UIWidgets.animation;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.rendering;
using Unity.UIWidgets.ui;
using UnityEngine;
namespace Unity.UIWidgets.widgets {
public abstract class AnimatedWidget : StatefulWidget {
public readonly Listenable listenable;
protected AnimatedWidget(Key key = null, Listenable listenable = null) : base(key) {
D.assert(listenable != null);
this.listenable = listenable;
}
protected internal abstract Widget build(BuildContext context);
public override State createState() {
return new _AnimatedState();
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new DiagnosticsProperty<Listenable>("animation", this.listenable));
}
}
public class _AnimatedState : State<AnimatedWidget> {
public override void initState() {
base.initState();
this.widget.listenable.addListener(this._handleChange);
}
public override void didUpdateWidget(StatefulWidget oldWidget) {
base.didUpdateWidget(oldWidget);
if (this.widget.listenable != ((AnimatedWidget) oldWidget).listenable) {
((AnimatedWidget) oldWidget).listenable.removeListener(this._handleChange);
this.widget.listenable.addListener(this._handleChange);
}
}
public override void dispose() {
this.widget.listenable.removeListener(this._handleChange);
base.dispose();
}
void _handleChange() {
this.setState(() => {
// The listenable's state is our build state, and it changed already.
});
}
public override Widget build(BuildContext context) {
return this.widget.build(context);
}
}
public class SlideTransition : AnimatedWidget {
public SlideTransition(Key key = null,
Animation<Offset> position = null,
bool transformHitTests = true,
TextDirection? textDirection = null,
Widget child = null) : base(key: key, listenable: position) {
D.assert(position != null);
this.transformHitTests = transformHitTests;
this.textDirection = textDirection;
this.child = child;
}
public Animation<Offset> position {
get { return (Animation<Offset>) this.listenable; }
}
public readonly TextDirection? textDirection;
public readonly bool transformHitTests;
public readonly Widget child;
protected internal override Widget build(BuildContext context) {
var offset = this.position.value;
if (this.textDirection == TextDirection.rtl) {
offset = new Offset(-offset.dx, offset.dy);
}
return new FractionalTranslation(
translation: offset,
transformHitTests: this.transformHitTests,
child: this.child
);
}
}
public class RotationTransition : AnimatedWidget {
public RotationTransition(
Key key = null,
Animation<float> turns = null,
Alignment alignment = null,
Widget child = null) : base(key: key, listenable: turns) {
D.assert(turns != null);
this.alignment = alignment ?? Alignment.center;
this.child = child;
}
public Animation<float> turns {
get { return (Animation<float>) this.listenable; }
}
public readonly Alignment alignment;
public readonly Widget child;
protected internal override Widget build(BuildContext context) {
float turnsValue = this.turns.value;
Matrix3 transform = Matrix3.makeRotate((turnsValue * Mathf.PI * 2.0f));
return new Transform(
transform: transform,
alignment: this.alignment,
child: this.child);
}
}
public class FadeTransition : SingleChildRenderObjectWidget {
public FadeTransition(Key key = null, Animation<float> opacity = null,
Widget child = null) : base(key: key, child: child) {
this.opacity = opacity;
}
public readonly Animation<float> opacity;
public override RenderObject createRenderObject(BuildContext context) {
return new RenderAnimatedOpacity(
opacity: this.opacity
);
}
public override void updateRenderObject(BuildContext context, RenderObject renderObject) {
((RenderAnimatedOpacity) renderObject).opacity = this.opacity;
}
public override void debugFillProperties(DiagnosticPropertiesBuilder properties) {
base.debugFillProperties(properties);
properties.add(new DiagnosticsProperty<Animation<float>>("opacity", this.opacity));
}
}
public class AnimatedBuilder : AnimatedWidget {
public readonly TransitionBuilder builder;
public readonly Widget child;
public AnimatedBuilder(Key key = null, Listenable animation = null, TransitionBuilder builder = null,
Widget child = null) :
base(key, animation) {
D.assert(builder != null);
this.builder = builder;
this.child = child;
}
protected internal override Widget build(BuildContext context) {
return this.builder(context, this.child);
}
}
}