SourceCode/PROMS/Volian.Controls.Library/BorderListBox.cs

using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;
using System.Drawing;
using System.Windows.Forms;

namespace Volian.Controls.Library
{
	public partial class BorderListBox : ListBox
	{
		#region Properties
		public GridLinePattern SelectedLinePattern
		{
			get { return (Items[SelectedIndex] as GridLBItem).LinePattern; }
		}
		#endregion
		#region ctor
		public BorderListBox()
		{
			InitializeComponent();
			SetupOptions();
		}
		public BorderListBox(IContainer container)
		{
			container.Add(this);
			InitializeComponent();
			SetupOptions();
		}
		private void SetupOptions()
		{
			this.DrawMode = DrawMode.OwnerDrawFixed;
			//this.Font.Size;
			DrawItem += new DrawItemEventHandler(BorderListBox_DrawItem);
			//MeasureItem += new MeasureItemEventHandler(BorderListBox_MeasureItem);
			Items.Add(new GridLBItem(GridLinePattern.None));
			Items.Add(new GridLBItem(GridLinePattern.Single));
			Items.Add(new GridLBItem(GridLinePattern.Double));
			Items.Add(new GridLBItem(GridLinePattern.Thick));
			Items.Add(new GridLBItem(GridLinePattern.Dashed));
			Items.Add(new GridLBItem(GridLinePattern.Dotted));
			SelectedIndex = 1;
		}
		public void SetupFontAndSize(int fontSize)
		{
			Font = new Font(Font.FontFamily, fontSize, Font.Style);
			using (Graphics gr = CreateGraphics())
			{
				SizeF mySize = gr.MeasureString("Almg", Font);
				ItemHeight = 	(int)Math.Ceiling(mySize.Height);
			}
			int newHeight = Items.Count * ItemHeight + 4;
			Size = new Size(newHeight, newHeight);
		}
		#endregion
		#region Event Handlers
		//void BorderListBox_MeasureItem(object sender, MeasureItemEventArgs e)
		//{
		//  e.ItemHeight = 22;
		//}
		private int _MaxLabelWidth = 0;
		private int MaxLabelWidth(Graphics gr)
		{
			if(_MaxLabelWidth == 0)
			{
				for(int i=0;i<Items.Count;i++)
					_MaxLabelWidth = Math.Max(_MaxLabelWidth,(int) gr.MeasureString("XX" + Items[0].ToString(), Font).Width);
			}
			return _MaxLabelWidth;
		}
		private void BorderListBox_DrawItem(object sender, DrawItemEventArgs e)
		{
			e.DrawBackground();
			e.DrawFocusRectangle();
			int y = (e.Bounds.Top + e.Bounds.Bottom) / 2;
			GridLBItem myGridLBItem = Items[e.Index] as GridLBItem;
			Brush myBrush = new SolidBrush(e.ForeColor);
			e.Graphics.DrawString(myGridLBItem.LinePattern.ToString(), Font, myBrush, e.Bounds);
			Pen pn = VlnBorders.LinePen(myGridLBItem.LinePattern, e.ForeColor);
			int leftMargin = MaxLabelWidth(e.Graphics);
			int rightMargin = 4;
			switch (myGridLBItem.LinePattern)
			{
				case GridLinePattern.Double:
					e.Graphics.DrawLine(pn, e.Bounds.Left + leftMargin, y + 1, e.Bounds.Right - rightMargin, y + 1);
					e.Graphics.DrawLine(pn, e.Bounds.Left + leftMargin, y - 1, e.Bounds.Right - rightMargin, y - 1);
					break;
				case GridLinePattern.None:
					break;
				case GridLinePattern.Single:
				case GridLinePattern.Thick:
				case GridLinePattern.Dotted:
				case GridLinePattern.Dashed:
				case GridLinePattern.Mixed:
				default:
					e.Graphics.DrawLine(pn, e.Bounds.Left + leftMargin, y, e.Bounds.Right - rightMargin, y);
					break;
			}
		}
		#endregion
	}
	public class GridLBItem
	{
		#region Properties
		private GridLinePattern _LinePattern;
		public GridLinePattern LinePattern
		{
			get { return _LinePattern; }
			set { _LinePattern = value; }
		}
		#endregion
		#region ctor
		public GridLBItem(GridLinePattern linePattern)
		{
			LinePattern = linePattern;
		}
		#endregion
		#region Public Methods
		public override string ToString()
		{
			return LinePattern.ToString();
		}
		#endregion
	}
}