using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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namespace Microsoft.Windows.Forms
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{
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partial class UIControl
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{
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/// <summary>
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/// 虚拟控件集合
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/// </summary>
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public class UIControlCollection : Collection<UIControl>, IDisposable
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{
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//集合所属控件
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private IUIControl m_Owner;
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="owner">所属控件</param>
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internal UIControlCollection(IUIControl owner)
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{
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if (owner == null)
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throw new ArgumentNullException("owner");
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this.m_Owner = owner;
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}
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/// <summary>
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/// 析构函数
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/// </summary>
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~UIControlCollection()
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{
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this.Dispose(false);
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}
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/// <summary>
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/// 插入控件
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/// </summary>
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/// <param name="index">索引,值越小 Z 轴顺序越靠后</param>
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/// <param name="control">控件</param>
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protected override void InsertItem(int index, UIControl control)
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{
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if (control == null)
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throw new ArgumentNullException("control");
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if (control.UIParentInternal == this.m_Owner)
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{
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control.BringToFront();
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}
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else
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{
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if (control.UIParentInternal != null)
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control.UIParentInternal.UIControls.Remove(control);
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this.m_Owner.SuspendLayout();
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try
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{
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base.InsertItem(index, control);
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control.UIParentInternal = this.m_Owner;
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}
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finally
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{
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this.m_Owner.ResumeLayout();
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}
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}
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}
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/// <summary>
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/// 移除控件
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/// </summary>
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/// <param name="index">索引</param>
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protected override void RemoveItem(int index)
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{
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UIControl control = this[index];
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this.m_Owner.SuspendLayout();
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try
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{
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base.RemoveItem(index);
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control.UIParentInternal = null;
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}
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finally
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{
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this.m_Owner.ResumeLayout();
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}
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}
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/// <summary>
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/// 不支持的操作
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/// </summary>
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/// <param name="index">索引</param>
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/// <param name="control">控件</param>
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protected override void SetItem(int index, UIControl control)
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{
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throw new NotSupportedException("不支持的操作");
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}
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/// <summary>
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/// 清空所有控件
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/// </summary>
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protected override void ClearItems()
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{
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this.m_Owner.SuspendLayout();
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try
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{
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foreach (UIControl control in this)
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control.UIParentInternal = null;
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base.ClearItems();
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}
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finally
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{
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this.m_Owner.ResumeLayout();
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}
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}
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/// <summary>
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/// 批量添加控件
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/// </summary>
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/// <param name="controls">控件集合</param>
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public void AddRange(IEnumerable<UIControl> controls)
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{
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this.m_Owner.SuspendLayout();
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try
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{
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foreach (UIControl control in controls)
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this.Add(control);
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}
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finally
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{
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this.m_Owner.ResumeLayout();
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}
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}
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/// <summary>
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/// 释放资源
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/// </summary>
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/// <param name="disposing">释放托管资源为 true,否则为 false</param>
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private void Dispose(bool disposing)
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{
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if (this.m_Owner != null)
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{
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if (this.Count > 0)
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{
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this.m_Owner.SuspendLayout();
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try
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{
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UIControl[] array = new UIControl[this.Count];
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this.CopyTo(array, 0);
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foreach (UIControl control in array)
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control.Dispose();
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base.ClearItems();
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}
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finally
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{
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this.m_Owner.ResumeLayout();
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}
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}
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this.m_Owner = null;
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}
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}
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/// <summary>
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/// 释放资源
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/// </summary>
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public void Dispose()
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{
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this.Dispose(true);
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GC.SuppressFinalize(this);
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}
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}
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}
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}
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