596 lines
16 KiB
C#
596 lines
16 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections;
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using System.Text;
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using System.Linq;
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namespace CPF
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{
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/// <summary>
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/// 子元素集合
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/// </summary>
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public class UIElementCollection : IEnumerable<UIElement>, IList, IList<UIElement>
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#if NET40
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#else
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, IReadOnlyList<UIElement>
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#endif
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{
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UIElement owner;
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public UIElementCollection(UIElement owner)
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{
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this.owner = owner;
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orderByZIndexList = ElementList;
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}
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List<UIElement> UIElements = new List<UIElement>();
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/// <summary>
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/// 内部UIElementList
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/// </summary>
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public List<UIElement> ElementList
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{
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get { return UIElements; }
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}
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UIElement[] list;
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/// <summary>
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/// 获取根据TabIndex排序之后的List
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/// </summary>
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internal UIElement[] OrderByTabIndexList()
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{
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//get
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//{
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if (list == null)
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{
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list = UIElements.ToArray();
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SortOfTabIndex(list);
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}
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return list;
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//}
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}
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private static void SortOfTabIndex(UIElement[] list)
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{//选择排序
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int min;
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for (int i = 0; i < list.Length; i++)
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{
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min = i;
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for (int j = i + 1; j < list.Length; j++)
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{
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if (list[j].TabIndex - list[min].TabIndex < 0)
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{
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min = j;
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}
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}
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UIElement temp = list[i];
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list[i] = list[min];
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list[min] = temp;
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}
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}
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IList<UIElement> orderByZIndexList;
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/// <summary>
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/// 获取根据ZIndex排序之后的List
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/// </summary>
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internal IList<UIElement> OrderByZIndexList()
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{
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//get
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//{
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if (orderByZIndexList == null)
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{
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SortOfZIndex();
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}
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return orderByZIndexList;
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//}
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}
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/// <summary>
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/// 相同的值，如果出现不相同，将为int.Min
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/// </summary>
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int zindex = 0;
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/// <summary>
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/// 根据ZIndex属性排序
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/// </summary>
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void SortOfZIndex()
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{//选择排序
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if (UIElements.Count < 2)
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{
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orderByZIndexList = UIElements;
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return;
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}
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orderByZIndexList = UIElements.ToList();
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int min;
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for (int i = 0; i < orderByZIndexList.Count; i++)
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{
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min = i;
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for (int j = i + 1; j < orderByZIndexList.Count; j++)
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{
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if (orderByZIndexList[j].ZIndex - orderByZIndexList[min].ZIndex < 0)
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{
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min = j;
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}
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}
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UIElement temp = orderByZIndexList[i];
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orderByZIndexList[i] = orderByZIndexList[min];
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orderByZIndexList[min] = temp;
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}
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zindex = orderByZIndexList[0].ZIndex;
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for (int i = 1; i < orderByZIndexList.Count; i++)
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{
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if (zindex != orderByZIndexList[i].ZIndex)
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{
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zindex = int.MinValue;
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break;
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}
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}
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}
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/// <summary>
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/// 重新按照ZIndex排序
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/// </summary>
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internal void InvalidateZIndex()
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{
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orderByZIndexList = null;
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}
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void AddUpdateZindex(UIElement element)
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{
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if (UIElements.Count == 1)
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{
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zindex = element.ZIndex;
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}
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else if (UIElements.Count > 1 && zindex != element.ZIndex)
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{
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zindex = int.MinValue;
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InvalidateZIndex();
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}
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}
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void RemoveUpdateZindex(UIElement element)
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{
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if (UIElements.Count == 1)
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{
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zindex = ElementList[0].ZIndex;
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if (orderByZIndexList != null && orderByZIndexList != ElementList)
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{
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orderByZIndexList.Remove(element);
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}
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}
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else if (ElementList.Count > 1)
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{
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if (orderByZIndexList != null && orderByZIndexList != ElementList)
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{
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orderByZIndexList.Remove(element);
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}
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}
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else
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{
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orderByZIndexList = UIElements;
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}
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}
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public T Add<T>(T visual) where T : UIElement
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{
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if (visual == null)
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{ return null; }
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if (visual.Parent != null)
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{
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visual.Parent.Children.Remove(visual);
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}
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visual.Parent = owner;
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UIElements.Add(visual);
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list = null;
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AddUpdateZindex(visual);
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owner.RaiseUIElementAdded(visual);
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return visual;
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}
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void ICollection<UIElement>.Add(UIElement visual)
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{
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Add(visual);
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}
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public void Add(IEnumerable<UIElement> items)
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{
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if (items == null)
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{
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return;
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}
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UIElements.AddRange(items);
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foreach (UIElement item in items)
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{
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if (item.Parent != null)
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{
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item.Parent.Children.Remove(item);
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}
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item.Parent = owner;
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list = null;
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AddUpdateZindex(item);
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owner.RaiseUIElementAdded(item);
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}
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}
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public void Clear()
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{
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UIElement[] v = UIElements.ToArray();
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UIElements.Clear();
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list = null;
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foreach (UIElement item in v)
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{
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item.Parent = null;
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owner.RaiseUIElementRemoved(item);
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}
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orderByZIndexList = UIElements;
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}
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public bool Contains(UIElement value)
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{
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return UIElements.Contains(value);
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}
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public int IndexOf(UIElement value)
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{
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return UIElements.IndexOf(value);
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}
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/// <summary>
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/// 将控件插入到指定索引处
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/// </summary>
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/// <param name="index"></param>
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/// <param name="visual"></param>
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public void Insert(int index, UIElement visual)
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{
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//if (!controls.Contains(visual))
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//{
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UIElement parent = visual.Parent as UIElement;
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if (parent != null)//如果原来已经添加在其他控件集合里
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{
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parent.Children.Remove(visual);//移出控件
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}
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UIElements.Insert(index, visual);
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visual.Parent = owner;
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list = null;
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AddUpdateZindex(visual);
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owner.RaiseUIElementAdded(visual);
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//}
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}
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bool IList.Contains(object value)
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{
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return UIElements.Contains((UIElement)value);
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}
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int IList.IndexOf(object value)
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{
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return UIElements.IndexOf((UIElement)value);
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}
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void IList.Insert(int index, object value)
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{
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UIElement visual = value as UIElement;
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if (visual != null)
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{
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Insert(index, visual);
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}
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}
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int IList.Add(object value)
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{
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UIElement v = value as UIElement;
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if (v != null)
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{
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Add(v);
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return UIElements.Count - 1;
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}
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return -1;
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}
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bool IList.IsFixedSize
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{
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get { return false; }
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}
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bool IList.IsReadOnly
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{
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get { return false; }
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}
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void IList.Remove(object value)
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{
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UIElement v = value as UIElement;
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if (v != null)
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{
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Remove(v);
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}
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}
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object IList.this[int index]
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{
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get
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{
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return UIElements[index];
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}
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set
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{
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throw new NotImplementedException();
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}
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}
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bool ICollection.IsSynchronized
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{
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get { return true; }
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}
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object ICollection.SyncRoot
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{
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get { return this; }
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}
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public UIElement this[int index]
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{
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get { return UIElements[index]; }
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set
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{
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if (value == null)
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{
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throw new Exception("UIElement不能为空");
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}
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var old = UIElements[index];
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if (old == value)
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{
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return;
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}
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if (value.Parent != null)
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{
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value.Parent.Children.Remove(value);
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}
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old.Parent = null;
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list = null;
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RemoveUpdateZindex(old);
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owner.RaiseUIElementRemoved(old);
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value.Parent = owner;
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UIElements[index] = value;
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list = null;
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AddUpdateZindex(value);
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owner.RaiseUIElementAdded(value);
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}
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}
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public UIElement this[string name]
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{
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get
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{
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foreach (UIElement item in UIElements)
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{
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if (item.Name == name)
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{
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return item;
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}
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}
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return null;
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}
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}
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public void Remove(UIElement value)
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{
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if (value == null || UIElements.Count == 0)
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{
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return;
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}
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UIElements.Remove(value);
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value.Parent = null;
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list = null;
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RemoveUpdateZindex(value);
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owner.RaiseUIElementRemoved(value);
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}
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public void RemoveAt(int index)
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{
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UIElement visual = UIElements[index];
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UIElements.RemoveAt(index);
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visual.Parent = null;
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list = null;
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RemoveUpdateZindex(visual);
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owner.RaiseUIElementRemoved(visual);
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}
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public void RemoveRange(int start, int count)
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{
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UIElement[] vs = new UIElement[count];
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int index = 0;
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for (int i = start; i < start + count; i++)
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{
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vs[index] = UIElements[i];
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index++;
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}
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UIElements.RemoveRange(start, count);
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list = null;
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foreach (UIElement item in vs)
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{
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item.Parent = null;
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RemoveUpdateZindex(item);
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owner.RaiseUIElementRemoved(item);
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}
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}
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public void CopyTo(Array array, int index)
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{
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if (array != null && array.Length > 0)
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{
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UIElements.CopyTo((UIElement[])array, index);
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}
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}
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public int Count
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{
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get { return UIElements.Count; }
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}
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public bool IsReadOnly
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{
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get
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{
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return false;
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}
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}
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public UIElement Owner
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{
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get
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{
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return owner;
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}
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}
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UIElement IList<UIElement>.this[int index]
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{
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get
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{
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return UIElements[index];
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}
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set
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{
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throw new NotImplementedException();
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}
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}
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/// <summary>
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/// 使用指定的比较器对所有元素进行排序
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/// </summary>
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/// <param name="comparer">比较元素时要使用的比较器</param>
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public void Sort(Comparer<UIElement> comparer)
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{
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UIElements.Sort(comparer);
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}
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/// <summary>
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/// 使用指定的比较器对所有元素进行排序。
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/// </summary>
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/// <param name="comparer">比较元素时要使用的比较器</param>
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public void Sort(IComparer<UIElement> comparer)
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{
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UIElements.Sort(comparer);
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}
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/// <summary>
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/// 使用指定的 System.Comparison 对整个 UIElementCollection 中的元素进行排序。
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/// </summary>
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/// <param name="comparison"></param>
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public void Sort(Comparison<UIElement> comparison)
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{
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UIElements.Sort(comparison);
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}
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/// <summary>
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/// 使用指定的比较器对某个范围内的元素进行排序。
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/// </summary>
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/// <param name="index">要排序的范围的从零开始的起始索引。</param>
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/// <param name="count">要排序的范围的长度</param>
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/// <param name="comparer">比较元素时要使用的比较器</param>
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public void Sort(int index, int count, IComparer<UIElement> comparer)
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{
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UIElements.Sort(index, count, comparer);
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}
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/// <summary>
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/// 搜索与指定谓词所定义的条件相匹配的元素，并返回整个集合中的第一个匹配元素
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/// </summary>
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/// <param name="match"></param>
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/// <returns></returns>
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public UIElement Find(Predicate<UIElement> match)
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{
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return UIElements.Find(match);
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}
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/// <summary>
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/// 确定 集合 是否包含与指定谓词所定义的条件相匹配的元素
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/// </summary>
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/// <param name="match"></param>
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/// <returns></returns>
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public bool Exists(Predicate<UIElement> match)
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{
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return UIElements.Exists(match);
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}
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/// <summary>
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/// 检索与指定谓词定义的条件匹配的所有元素
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/// </summary>
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/// <param name="match"></param>
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/// <returns></returns>
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public List<UIElement> FindAll(Predicate<UIElement> match)
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{
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return UIElements.FindAll(match);
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}
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/// <summary>
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/// 搜索与指定谓词所定义的条件相匹配的元素，并返回整个集合 中第一个匹配元素的从零开始的索引。
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/// </summary>
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/// <param name="match"></param>
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/// <returns></returns>
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public int FindIndex(Predicate<UIElement> match)
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{
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return UIElements.FindIndex(match);
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}
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/// <summary>
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/// 搜索与指定谓词所定义的条件相匹配的元素，并返回整个 集合 中的最后一个匹配元素。
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/// </summary>
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/// <param name="match"></param>
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/// <returns></returns>
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public UIElement FindLast(Predicate<UIElement> match)
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{
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return UIElements.FindLast(match);
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}
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/// <summary>
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/// 搜索与指定谓词所定义的条件相匹配的元素，并返回整个 集合 中最后一个匹配元素的从零开始的索引。
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/// </summary>
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/// <param name="match"></param>
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/// <returns></returns>
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public int FindLastIndex(Predicate<UIElement> match)
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{
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return UIElements.FindLastIndex(match);
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}
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IEnumerator IEnumerable.GetEnumerator()
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{
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return ((IEnumerable)UIElements).GetEnumerator();
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}
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public IEnumerator<UIElement> GetEnumerator()
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{
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return UIElements.GetEnumerator();
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}
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public void CopyTo(UIElement[] array, int arrayIndex)
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{
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UIElements.CopyTo(array, arrayIndex);
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}
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/// <summary>
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/// 释放并清空子元素
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/// </summary>
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internal void DisposeChildren()
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{
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var count = UIElements.Count;
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for (int i = 0; i < count; i++)
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{
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//UIElements[count - i - 1].Dispose();
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var item = UIElements[count - i - 1];
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if (item is Controls.ContentControl c)
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{
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c.Content = null;
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}
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item.DataContext = null;
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item.Dispose();
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}
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}
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bool ICollection<UIElement>.Remove(UIElement item)
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{
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var r = item.Parent == owner;
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Remove(item);
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return r;
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}
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public override string ToString()
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{
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return Count.ToString();
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}
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}
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}
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