.NET 小物置き場

影付きラベル

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

namespace Hikipuro.Forms
{
	[Description("影付きラベル")]
	public partial class ShadowLabel : UserControl
	{
		/// <summary>
		/// ラベルから見た影の左右の位置
		/// </summary>
		private int shadowLeft = 2;

		/// <summary>
		/// ラベルから見た影の上下の位置
		/// </summary>
		private int shadowTop = 2;

		/// <summary>
		/// ラベルの影の色
		/// </summary>
		private Color shadowColor = Color.White;

		/// <summary>
		/// ラベルの文字
		/// </summary>
		private string labelText = "Label";

		//---------------------------------------------------------------------
		#region "デザイン時外部公開プロパティ"
		[Category("Appearance")]
		[Browsable(true)]
		[Description("ラベルから見た影の左右の位置")]
		public int ShadowLeft
		{
			get
			{
				return shadowLeft;
			}
			set
			{
				shadowLeft = value;
				Refresh();
			}
		}

		[Category("Appearance")]
		[Browsable(true)]
		[Description("ラベルから見た影の上下の位置")]
		public int ShadowTop
		{
			get
			{
				return shadowTop;
			}
			set
			{
				shadowTop = value;
				Refresh();
			}
		}

		[Category("Appearance")]
		[Browsable(true)]
		[Description("ラベルの影の色")]
		public Color ShadowColor
		{
			get
			{
				return shadowColor;
			}
			set
			{
				shadowColor = value;
				Refresh();
			}
		}

		[Category("Appearance")]
		[Browsable(true)]
		[Description("ラベルの文字")]
		public string LabelText
		{
			get
			{
				return labelText;
			}
			set
			{
				labelText = value;
				Refresh();
			}
		}

		#endregion
		//---------------------------------------------------------------------

		/// <summary>
		/// コンストラクタ
		/// </summary>
		public ShadowLabel()
		{
			InitializeComponent();
		}

		/// <summary>
		/// Paint イベントのオーバーロード
		/// </summary>
		/// <param name="e"></param>
		protected override void OnPaint(PaintEventArgs e)
		{
			Graphics g = e.Graphics;

			// 描画品質設定
			SetSmoothMode(g);

			// ボタンの文字列描画
			DrawText(g, shadowLeft, shadowTop, shadowColor);
			DrawText(g, 0, 0, this.ForeColor);
		}

		//---------------------------------------------------------------------
		#region "プライベートメソッド"

		/// <summary>
		/// 描画品質設定
		/// </summary>
		private void SetSmoothMode(Graphics g)
		{
			g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
			//g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
			g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
		}


		/// <summary>
		/// ボタンの文字列を描画
		/// </summary>
		/// <param name="g"></param>
		/// <returns></returns>
		private void DrawText(Graphics g, int offsetX, int offsetY, Color color)
		{
			// 描画領域の設定
			Rectangle rectangle = new Rectangle(this.Padding.Left + offsetX,
												this.Padding.Top + offsetY,
												this.Width - this.Padding.Left - this.Padding.Right,
												this.Height - this.Padding.Top - this.Padding.Bottom);

			// 文字列が描画領域に収まるように調整
			StringBuilder sb = new StringBuilder();
			StringBuilder sbm = new StringBuilder();

			foreach (char c in labelText)
			{
				sbm.Append(c);
				Size size = TextRenderer.MeasureText(sbm.ToString(), this.Font);

				if (size.Width > rectangle.Width - this.Font.Size)
				{
					sbm.Remove(sbm.Length - 1, 1);
					sbm.Append(c);
					sbm.AppendLine("");
					sb.Append(sbm.ToString());
					sbm = new StringBuilder();
				}
			}
			sb.Append(sbm.ToString());

			// 調整済みの文字列を描画
			TextRenderer.DrawText(g,
				sb.ToString(),
				this.Font,
				rectangle,
				color,
				TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);

		}

		#endregion
		//---------------------------------------------------------------------

	}
}