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
 
 
 
 
 
 

47 行
1.5 KiB

using System.Collections.Generic;
using Unity.UIWidgets.foundation;
using Unity.UIWidgets.ui;
namespace Unity.UIWidgets.flow {
public abstract class ContainerLayer : Layer {
readonly List<Layer> _layers = new List<Layer>();
public List<Layer> layers {
get { return this._layers; }
}
public void add(Layer layer) {
layer.parent = this;
this._layers.Add(layer);
}
public override void preroll(PrerollContext context, Matrix3 matrix) {
Rect childPaintBounds = Rect.zero;
this.prerollChildren(context, matrix, ref childPaintBounds);
this.paintBounds = childPaintBounds;
}
protected void prerollChildren(PrerollContext context, Matrix3 childMatrix, ref Rect childPaintBounds) {
foreach (var layer in this._layers) {
layer.preroll(context, childMatrix);
if (childPaintBounds == null || childPaintBounds.isEmpty) {
childPaintBounds = layer.paintBounds;
}
else {
childPaintBounds = childPaintBounds.expandToInclude(layer.paintBounds);
}
}
}
protected void paintChildren(PaintContext context) {
D.assert(this.needsPainting);
foreach (var layer in this._layers) {
if (layer.needsPainting) {
layer.paint(context);
}
}
}
}
}