VerticalLabel的简单实现

一早收到CodeProject的订阅邮件，大概看了一下。里面有一个做VerticalLabel的例子，我没看，就想自己做一个试试。抛砖引玉！

using System;
using System.Drawing;
using System.Windows.Forms;

namespace Webb.Publics.WinForm
{
    /**//// <summary>
    /// Summary description for VerticalLabel.
    /// </summary>
    public class VerticalLabel : System.Windows.Forms.Label
    {
        private int _Span = 0;
        public int TextSpan
        {
            get{return this._Span;}
            set{
                this._Span = value;
                this.Refresh();
            }
        }

        public VerticalLabel()
        {
            //
            // TODO: Add constructor logic here
            //    
            this.Width = 35;
            this.Height = 100;
        }    

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            //base.OnPaint (e);
            SizeF m_size = e.Graphics.MeasureString(this.Text,this.Font);
            float m_SingleWidth = m_size.Width/this.Text.Length+2;
            float m_SingleHeight = m_size.Height;
            float m_TotalWidth = m_SingleWidth;
            float m_TotalHeight = m_size.Height*this.Text.Length;
            //int i = 0;
            PointF m_Offset = this.MeasurePosition(m_TotalWidth,m_TotalHeight);
            for(int i = 0;i<this.Text.Length;i++)
            {
                RectangleF m_Rec = new RectangleF(m_Offset.X,m_Offset.Y+(m_SingleHeight+this.TextSpan)*i,m_SingleWidth,m_SingleHeight);
                e.Graphics.DrawString(this.Text.Substring(i,1),this.Font,new SolidBrush(this.ForeColor),m_Rec);
            }
        }

        private PointF MeasurePosition(float i_TotalWidth,float i_TotalHeight)
        {
            PointF m_Result;
            switch(this.TextAlign)
            {
                //Bottom
                case ContentAlignment.BottomCenter:
                    m_Result = new PointF((this.Width-i_TotalWidth)/2,this.Height-i_TotalHeight);
                    break;
                case ContentAlignment.BottomLeft:
                    m_Result = new PointF(0,this.Height-i_TotalHeight);
                    break;
                case ContentAlignment.BottomRight:
                    m_Result = new PointF(this.Width-i_TotalWidth,this.Height-i_TotalHeight);
                    break;
                //Middle
                case ContentAlignment.MiddleCenter:
                    m_Result = new PointF((this.Width-i_TotalWidth)/2,(this.Height-i_TotalHeight)/2);
                    break;
                case ContentAlignment.MiddleLeft:
                    m_Result = new PointF(0,(this.Height-i_TotalHeight)/2);
                    break;
                case ContentAlignment.MiddleRight:
                    m_Result = new PointF(this.Width-i_TotalWidth,(this.Height-i_TotalHeight)/2);
                    break;
                //Top
                case ContentAlignment.TopCenter:
                    m_Result = new PointF((this.Width-i_TotalWidth)/2,0);
                    break;
                default:
                case ContentAlignment.TopLeft:
                    m_Result = new PointF(0,0);
                    break;                
                case ContentAlignment.TopRight:
                    m_Result = new PointF(this.Width-i_TotalWidth,0);
                    break;
            }
            return m_Result;
        }
    }
}

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace WindowsApplication1
{
    /**//// <summary>
    /// Summary description for Form5.
    /// </summary>
    public class Form5 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.PropertyGrid propertyGrid1;
        private Webb.Publics.WinForm.VerticalLabel verticalLabel2;
        /**//// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form5()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /**//// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows Form Designer generated code#region Windows Form Designer generated code
        /**//// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.propertyGrid1 = new System.Windows.Forms.PropertyGrid();
            this.verticalLabel2 = new Webb.Publics.WinForm.VerticalLabel();
            this.SuspendLayout();
            // 
            // propertyGrid1
            // 
            this.propertyGrid1.CommandsVisibleIfAvailable = true;
            this.propertyGrid1.Dock = System.Windows.Forms.DockStyle.Right;
            this.propertyGrid1.LargeButtons = false;
            this.propertyGrid1.LineColor = System.Drawing.SystemColors.ScrollBar;
            this.propertyGrid1.Location = new System.Drawing.Point(304, 0);
            this.propertyGrid1.Name = "propertyGrid1";
            this.propertyGrid1.PropertySort = System.Windows.Forms.PropertySort.Alphabetical;
            this.propertyGrid1.SelectedObject = this.verticalLabel2;
            this.propertyGrid1.Size = new System.Drawing.Size(272, 269);
            this.propertyGrid1.TabIndex = 1;
            this.propertyGrid1.Text = "propertyGrid1";
            this.propertyGrid1.ViewBackColor = System.Drawing.SystemColors.Window;
            this.propertyGrid1.ViewForeColor = System.Drawing.SystemColors.WindowText;
            // 
            // verticalLabel2
            // 
            this.verticalLabel2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.verticalLabel2.Location = new System.Drawing.Point(8, 8);
            this.verticalLabel2.Name = "verticalLabel2";
            this.verticalLabel2.Size = new System.Drawing.Size(288, 256);
            this.verticalLabel2.TabIndex = 3;
            this.verticalLabel2.Text = "这是一个测试";
            this.verticalLabel2.TextSpan = 0;
            // 
            // Form5
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(576, 269);
            this.Controls.Add(this.verticalLabel2);
            this.Controls.Add(this.propertyGrid1);
            this.Name = "Form5";
            this.Text = "Form5";
            this.Load += new System.EventHandler(this.Form5_Load);
            this.ResumeLayout(false);

        }
        #endregion

        private void Form5_Load(object sender, System.EventArgs e)
        {
        
        }
    }
}