107 lines
2.9 KiB
C#
107 lines
2.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Drawing;
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using System.Linq;
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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 JinYuan.ControlLib
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{
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class LogItem
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{
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public String info;
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public int index;
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public Color color;
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}
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public partial class LogListBox : ListBox
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{
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private int m_nMaxLength = 1000;
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[CategoryAttribute("自定义")]
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[DescriptionAttribute("日志最大显示条数")]
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public int MaxLength
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{
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set
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{
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m_nMaxLength = value;
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}
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get
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{
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return m_nMaxLength;
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}
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}
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Dictionary<int, LogItem> m_dicItems = new Dictionary<int, LogItem>();
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public LogListBox()
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{
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InitializeComponent();
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this.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable;
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}
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public LogListBox(IContainer container)
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{
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container.Add(this);
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InitializeComponent();
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}
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protected override void OnDrawItem(DrawItemEventArgs e)
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{
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e.DrawBackground();
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e.DrawFocusRectangle();
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// 确保listbox中有日志且该日志被记录在字典中
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if (e.Index >= 0 && m_dicItems.Keys.Contains(e.Index))
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{
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e.Graphics.DrawString(m_dicItems[e.Index].info, Font, new SolidBrush(m_dicItems[e.Index].color), e.Bounds);
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}
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}
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protected override void OnMeasureItem(MeasureItemEventArgs e)
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{
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base.OnMeasureItem(e);
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e.ItemHeight = 16;
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}
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public void AddLog(String log, Color color)
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{
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ModefyItems();
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LogItem item = new LogItem();
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String showLog = String.Format("[{0}] {1}", DateTime.Now.ToString("HH:mm:ss"), log);
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item.info = showLog;
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item.color = color;
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item.index = Items.Add(log);
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if (!m_dicItems.Keys.Contains(item.index))
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m_dicItems.Add(item.index, item);
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SelectedIndex = item.index;
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}
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public void Clear()
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{
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Items.Clear();
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m_dicItems.Clear();
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}
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private void ModefyItems()
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{
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if (Items.Count >= m_nMaxLength)
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{
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Items.RemoveAt(0);
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for (int n = 0; n < m_dicItems.Count - 1; n++)
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{
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if (m_dicItems.Keys.Contains(n) && m_dicItems.Keys.Contains(n + 1))
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{
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m_dicItems[n].info = m_dicItems[n + 1].info;
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m_dicItems[n].color = m_dicItems[n + 1].color;
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}
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}
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m_dicItems.Remove(m_dicItems.Count - 1);
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}
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}
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}
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}
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