using System;
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using System.Threading.Tasks;
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namespace Shared.Phone.UserCenter
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{
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/// <summary>
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/// 制作一个搜索控件(控件左边为文本输入，控件右边有一个搜索图标,外面是一个有弧度的框),
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/// 添加控件后，请调用LoadEvent()函数进行回调函数的绑定
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/// </summary>
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public class SearchEditText : FrameLayout
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{
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#region ■ 变量声明__________________________
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/// <summary>
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/// 为了对应子线程
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/// </summary>
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private string m_Text = string.Empty;
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/// <summary>
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/// 文本值
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/// </summary>
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/// <value>The text.</value>
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public string Text
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{
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get
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{
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return m_Text;
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}
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set
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{
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this.m_Text = value;
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Application.RunOnMainThread(() =>
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{
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txtSearch.Text = this.m_Text;
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});
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}
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}
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/// <summary>
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/// 搜索控件
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/// </summary>
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private InputTextControl txtSearch = null;
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/// <summary>
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/// 调用回调函数
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/// </summary>
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private bool LoadAction = false;
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/// <summary>
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/// 回调函数
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/// </summary>
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private Action<string> actionMethod = null;
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#endregion
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#region ■ 初始化____________________________
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/// <summary>
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/// 制作一个搜索控件(控件左边为文本输入，控件右边有一个搜索图标,外面是一个有弧度的框),
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/// 添加控件后，请调用BindEvent()函数进行回调函数的绑定
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/// </summary>
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/// <param name="width">宽度</param>
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/// <param name="height">高度</param>
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public SearchEditText(int width = 850, int height = 120)
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{
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//桌布控件
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this.Y = Application.GetRealHeight(45);
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this.Width = Application.GetRealWidth(width);
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this.Height = Application.GetRealHeight(height);
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this.Radius = 8;
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this.BorderWidth = 1;
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this.BorderColor = UserCenterColor.Current.TextFrameColor;
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this.Gravity = Gravity.CenterHorizontal;
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}
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/// <summary>
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/// 绑定事件
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/// </summary>
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/// <param name="action">回调函数：值是输入的关键字</param>
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public void BindEvent(Action<string> action)
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{
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this.LoadAction = true;
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this.actionMethod = action;
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//控件初始化
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this.InitControl(action);
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//打开搜索键值的线程
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this.StartSearchKeysThead();
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}
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/// <summary>
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/// 移除事件
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/// </summary>
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public void RemoveEvent()
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{
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this.LoadAction = false;
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}
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/// <summary>
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/// 控件初始化
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/// </summary>
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/// <param name="action">回调函数：值是输入的关键字</param>
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private void InitControl(Action<string> action)
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{
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if (txtSearch != null)
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{
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return;
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}
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//搜索
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txtSearch = new InputTextControl(this.Width - Application.GetRealWidth(150), this.Height)
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{
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X = Application.GetRealWidth(35),
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TextAlignment = TextAlignment.Center,
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Gravity = Gravity.CenterVertical,
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PlaceholderText = Language.StringByID(R.MyInternationalizationString.uSearch),
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PlaceholderTextColor = UserCenterColor.Current.Gray
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};
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this.AddChidren(txtSearch);
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var btnIcon = new IconViewControl(72)
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{
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Gravity = Gravity.CenterVertical,
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X = txtSearch.Right + Application.GetRealWidth(10),
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UnSelectedImagePath = "Item/Search.png",
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SelectedImagePath = "Item/SearchCancel.png"
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};
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btnIcon.MouseUpEventHandler += (sender, e) =>
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{
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txtSearch.Text = string.Empty;
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};
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this.AddChidren(btnIcon);
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string oldText = string.Empty;
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//值改变事件
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txtSearch.TextChangeEventHandler += (sender, e) =>
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{
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if (this.LoadAction == false)
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{
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return;
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}
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this.nextSearchKeys = txtSearch.Text.Trim();
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this.m_Text = this.nextSearchKeys;
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if (oldText == this.nextSearchKeys)
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{
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//输入的值一样
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return;
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}
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oldText = this.nextSearchKeys;
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//更改图标
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if (this.nextSearchKeys == string.Empty && btnIcon.IsSelected == true)
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{
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btnIcon.IsSelected = false;
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}
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if (this.nextSearchKeys != string.Empty && btnIcon.IsSelected == false)
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{
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btnIcon.IsSelected = true;
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}
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//允许执行回调函数
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this.isCanSearch = true;
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};
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}
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#endregion
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#region ■ 开启线程__________________________
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/// <summary>
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/// 线程开启中
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/// </summary>
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private bool isThreadAciton = false;
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/// <summary>
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/// 能否执行搜索
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/// </summary>
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private bool isCanSearch = false;
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/// <summary>
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/// 下一个搜索键值
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/// </summary>
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private string nextSearchKeys = string.Empty;
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/// <summary>
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/// 打开搜索键值的线程
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/// </summary>
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private void StartSearchKeysThead()
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{
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if (isThreadAciton == true)
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{
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return;
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}
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this.isThreadAciton = true;
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new System.Threading.Thread(() =>
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{
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while (isThreadAciton && this.Parent != null)
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{
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//根据逻辑，不能够搜索的话，等待
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if (this.isCanSearch == false)
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{
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System.Threading.Thread.Sleep(1000);
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continue;
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}
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//获取当前瞬间的键值
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string nowSearchKeys = nextSearchKeys;
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//根据搜索键值，调用回调函数
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this.actionMethod(nowSearchKeys);
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//处理完毕后，如果当前的检索键值与下一个检索键值一样的话
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//说明用户已经不再输入键值了，这个时候，停止搜索
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if (nowSearchKeys == nextSearchKeys)
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{
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this.isCanSearch = false;
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}
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//如果当前的检索键值与下一个检索键值不一样的话
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//那就说明，用户再次输入了键值，这个时候，让线程继续跑下去
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}
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})
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{ IsBackground = true }.Start();
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}
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/// <summary>
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/// 关闭线程
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/// </summary>
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public void CloseThead()
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{
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this.isThreadAciton = false;
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}
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#endregion
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}
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}
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