using System;
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using System.Threading.Tasks;
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namespace Shared.Phone
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{
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/// <summary>
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/// 制作一个根据键值进行搜索的控件
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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 SearchTextControl : 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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txtSearch.Text = this.m_Text;
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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 TextInputControl txtSearch = null;
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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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/// <summary>
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/// 没有输入键值的显示文本
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/// </summary>
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private string tipText = string.Empty;
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#endregion
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#region ■ 初始化____________________________
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/// <summary>
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/// 制作一个根据键值进行搜索的控件
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/// 添加控件到父控件后，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="i_tipText">没有输入键值的显示文本</param>
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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 SearchTextControl(string i_tipText, int width = 965, int height = 104)
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{
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this.tipText = i_tipText;
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//桌布控件
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this.Width = Application.GetRealWidth(width);
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this.Height = Application.GetRealHeight(height);
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this.Gravity = Gravity.CenterHorizontal;
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this.Radius = (uint)Application.GetRealHeight(17);
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this.BackgroundColor = 0xfff8f7f7;
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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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//搜索图标
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var btnIcon = new IconViewControl(52);
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btnIcon.Gravity = Gravity.CenterVertical;
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btnIcon.X = HdlControlResourse.XXLeft;
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btnIcon.UnSelectedImagePath = "Item/Search.png";
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this.AddChidren(btnIcon);
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//取消
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var btnCancel = new IconViewControl(58);
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btnCancel.X = this.Width - HdlControlResourse.XXLeft / 2 - btnCancel.IconSize;
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btnCancel.UnSelectedImagePath = "Item/CancelIcon.png";
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btnCancel.Gravity = Gravity.CenterVertical;
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this.AddChidren(btnCancel);
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btnCancel.ButtonClickEvent += (sender, e) =>
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{
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this.Text = string.Empty;
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};
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//输入文本
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int textWidth = btnCancel.X - Application.GetRealWidth(132 + 10);
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txtSearch = new TextInputControl(textWidth, Application.GetRealHeight(49), false);
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txtSearch.X = Application.GetRealWidth(132);
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txtSearch.PlaceholderText = this.tipText;
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txtSearch.Gravity = Gravity.CenterVertical;
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txtSearch.TextSize = 12;
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txtSearch.PlaceholderTextColor = UserCenterColor.Current.TextGrayColor1;
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this.AddChidren(txtSearch);
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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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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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//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 ■ 绑定事件__________________________
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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.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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#endregion
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#region ■ 开启线程__________________________
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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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HdlThreadLogic.Current.RunThread(() =>
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{
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while (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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}
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#endregion
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#region ■ 控件摧毁__________________________
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/// <summary>
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/// 控件摧毁
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/// </summary>
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public override void RemoveFromParent()
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{
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actionMethod = null;
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base.RemoveFromParent();
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}
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#endregion
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}
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}
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