您最多选择25个主题 主题必须以中文或者字母或数字开头,可以包含连字符 (-),并且长度不得超过35个字符
 
 
 
 
 
 

133 行
4.5 KiB

using System;
using Unity.UIWidgets.animation;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.rendering;
using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.material {
static class InkHighlightUtils {
public static readonly TimeSpan _kHighlightFadeDuration = new TimeSpan(0, 0, 0, 0, 200);
}
public class InkHighlight : InteractiveInkFeature {
public InkHighlight(
MaterialInkController controller = null,
RenderBox referenceBox = null,
Color color = null,
BoxShape shape = BoxShape.rectangle,
BorderRadius borderRadius = null,
ShapeBorder customBorder = null,
RectCallback rectCallback = null,
VoidCallback onRemoved = null) : base(
controller: controller,
referenceBox: referenceBox,
color: color,
onRemoved: onRemoved) {
D.assert(color != null);
D.assert(controller != null);
D.assert(referenceBox != null);
this._shape = shape;
this._borderRadius = borderRadius ?? BorderRadius.zero;
this._customBorder = customBorder;
this._rectCallback = rectCallback;
this._alphaController = new AnimationController(
duration: InkHighlightUtils._kHighlightFadeDuration,
vsync: controller.vsync);
this._alphaController.addListener(controller.markNeedsPaint);
this._alphaController.addStatusListener(this._handleAlphaStatusChanged);
this._alphaController.forward();
this._alpha = this._alphaController.drive(new IntTween(
begin: 0, end: color.alpha));
this.controller.addInkFeature(this);
}
readonly BoxShape _shape;
readonly BorderRadius _borderRadius;
readonly ShapeBorder _customBorder;
readonly RectCallback _rectCallback;
Animation<int> _alpha;
AnimationController _alphaController;
public bool active {
get { return this._active; }
}
bool _active = true;
public void activate() {
this._active = true;
this._alphaController.forward();
}
public void deactivate() {
this._active = false;
this._alphaController.reverse();
}
void _handleAlphaStatusChanged(AnimationStatus status) {
if (status == AnimationStatus.dismissed && !this._active) {
this.dispose();
}
}
public override void dispose() {
this._alphaController.dispose();
base.dispose();
}
void _paintHighlight(Canvas canvas, Rect rect, Paint paint) {
canvas.save();
if (this._customBorder != null) {
canvas.clipPath(this._customBorder.getOuterPath(rect));
}
switch (this._shape) {
case BoxShape.circle: {
canvas.drawCircle(rect.center, Material.defaultSplashRadius, paint);
break;
}
case BoxShape.rectangle: {
if (this._borderRadius != BorderRadius.zero) {
RRect clipRRect = RRect.fromRectAndCorners(
rect,
topLeft: this._borderRadius.topLeft,
topRight: this._borderRadius.topRight,
bottomLeft: this._borderRadius.bottomLeft,
bottomRight: this._borderRadius.bottomRight);
canvas.drawRRect(clipRRect, paint);
}
else {
canvas.drawRect(rect, paint);
}
break;
}
}
canvas.restore();
}
protected override void paintFeature(Canvas canvas, Matrix3 transform) {
Paint paint = new Paint {color = this.color.withAlpha(this._alpha.value)};
Offset originOffset = transform.getAsTranslation();
Rect rect = this._rectCallback != null ? this._rectCallback() : Offset.zero & this.referenceBox.size;
if (originOffset == null) {
canvas.save();
canvas.concat(transform);
this._paintHighlight(canvas, rect, paint);
canvas.restore();
}
else {
this._paintHighlight(canvas, rect.shift(originOffset), paint);
}
}
}
}