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170 lines
4.3 KiB
170 lines
4.3 KiB
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace BWP.WinFormControl
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{
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public class UComboBox : ComboBox
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{
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ToolTip itemTip = null;
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public UComboBox()
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{
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this.DropDown += (sender, de) =>
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{
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CRefreshItems();
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//if (string.IsNullOrEmpty(this.Text))
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// return;
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//if (_enableTopItem && Items.Count > 1)
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// this.SelectedIndex = 1;
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//else if (!_enableTopItem && Items.Count > 0)
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// this.SelectedIndex = 0;
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};
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this.DrawMode = DrawMode.OwnerDrawFixed;
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this.DrawItem += new DrawItemEventHandler(cb_DrawItem);
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this.DropDownClosed += new EventHandler(cb_DropDownClosed);
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itemTip = new ToolTip();
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itemTip.SetToolTip(this, "");
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}
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void cb_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
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{
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// 绘制背景
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e.DrawBackground();
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//绘制列表项目
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e.Graphics.DrawString(this.Items[e.Index].ToString(), e.Font, System.Drawing.Brushes.Black, e.Bounds);
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//将高亮的列表项目的文字传递到toolTip1(之前建立ToolTip的一个实例)
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if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
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itemTip.Show(this.Items[e.Index].ToString(), this, e.Bounds.X + e.Bounds.Width, e.Bounds.Y + e.Bounds.Height);
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e.DrawFocusRectangle();
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}
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void cb_DropDownClosed(object sender, EventArgs e)
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{
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itemTip.Hide(this);
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}
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public string DefaultServerPath = "/MainSystem/B3ClientService/Rpcs/";
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public string CodeArgs { get; set; }
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private bool _enableTopItem = true;
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public bool EnableTopItem
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{
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get { return _enableTopItem; }
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set { _enableTopItem = value; }
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}
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private int range = 10;
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public int Range
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{
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get { return range; }
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set { range = value; }
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}
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private string rpcPath;
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public void Init(string _rpcPath)
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{
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rpcPath = _rpcPath;
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if (string.IsNullOrEmpty(rpcPath))
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return;
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rpcPath = string.Format("{0}{1}", DefaultServerPath, rpcPath);
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}
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protected override void OnKeyUp(KeyEventArgs e)
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{
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base.OnKeyUp(e);
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if (e.KeyCode == System.Windows.Forms.Keys.Enter)
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{
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if (string.IsNullOrEmpty(this.Text) || this.DisplayValue != this.Text || string.IsNullOrEmpty(this.SelectedText))
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{
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if (!this.DroppedDown)
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this.DroppedDown = true;
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}
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}
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}
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private new WordPair SelectedValue
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{
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get
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{
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if (this.SelectedItem == null)
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return null;
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var result = this.SelectedItem as WordPair;
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if (string.IsNullOrEmpty(result.PhyName) && string.IsNullOrEmpty(result.DisplayName))
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return null;
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return result;
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}
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}
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void CRefreshItems()
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{
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var inputArgs = string.Empty;
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if (this.SelectedValue == null)
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inputArgs = this.Text;
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var list = ComboBoxHelper.GetList(rpcPath, inputArgs, CodeArgs, Range);
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if (_enableTopItem)
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list.Insert(0, new WordPair(string.Empty));
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this.Items.Clear();
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foreach (var item in list)
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this.Items.Add(item);
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this.DisplayMember = "DisplayName";
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this.ValueMember = "PhyName";
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}
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public void Fill(string displayValue, string phyValue)
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{
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this.SelectedText = displayValue;
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this.SelectedItem = new WordPair(displayValue, phyValue);
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}
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public void Clear()
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{
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this.Text = null;
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this.SelectedText = null;
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this.SelectedItem = null;
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}
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public bool IsEmpty
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{
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get { return SelectedValue == null; }
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}
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public string DisplayValue
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{
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get
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{
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if (SelectedValue == null)
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return string.Empty;
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return SelectedValue.DisplayName;
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}
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}
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public string Value
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{
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get
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{
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if (SelectedValue == null)
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return string.Empty;
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return SelectedValue.PhyName;
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}
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}
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public long? LongValue
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{
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get
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{
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if (SelectedValue == null)
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return null;
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long v;
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if (long.TryParse(SelectedValue.PhyName, out v))
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return v;
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return null;
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}
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}
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}
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}
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