www.pudn.com > Cnewprint.rar > Caption.cs

using System; 
using System.Drawing; 
 
namespace GoldPrinter 
{ 
	/// 
 
	/// 子标题 
	///  
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	/// 下    载： 
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	///★★★★★您可以免费使用此程序，但是请您保留此说明，以维护知识产权★★★★★ 
	/// 
 
	public class Caption:Printer 
	{ 
		private string _text;			//文本 
		private int _maxRows;			//限制行数 
		private bool _hasborder;		//画边框 
 
		/// 
 
		///  默认构造函数 
		/// 
 
		public Caption() 
		{	 
			//初始值 
			_text = ""; 
			_maxRows = 1; 
			_hasborder = false; 
			this.Font = new Font("宋体",13,FontStyle.Italic);		//字体 
 
			this.IsDrawAllPage = true; 
		} 
 
		/// 
 
		/// 子标题构造函数 
		/// 
 
		///  
		public Caption(string text):this() 
		{ 
			this._text = text; 
		} 
 
		public string Text 
		{ 
			get{return this._text;} 
			set{this._text = value;} 
		}	 
 
		public bool HasBorder 
		{ 
			get{return this._hasborder;} 
			set{this._hasborder = value;} 
		}	 
 
		/// 
 
		/// 限制行数，小于0为不限制 
		/// 
 
		public int MaxRows 
		{ 
			get{return this._maxRows;} 
			set{this._maxRows = value;} 
		}	 
 
		public override void Draw() 
		{ 
			base.Draw(); 
 
			//绘图起始座标及字符串的宽与高 
			float x,y; 
			x = this.PrinterMargins.X1; 
			y = this.PrinterMargins.Y1;			 
 
			//相对移动 
			x += this.MoveX; 
			y += this.MoveY; 
 
			 
			//测量字符串尺寸是否过量 
			float width = this.PrinterMargins.Width;	//用最宽使居中	//this.TextWidth(this._text);	//获取文本的宽，最宽不会超过有效打印页的宽 
			float height = this.TextHeight(this._text);	//获取文本的高，测量基宽为有效打印页的宽 
 
			//不能超过最高 
			if (height > this.PrinterMargins.Height) 
			{ 
				height = this.PrinterMargins.Height; 
			} 
 
			//限制行数 
			if (this._maxRows > 0) 
			{ 
				if (height > this.Font.Height * _maxRows) 
				{ 
					height = this.Font.Height * _maxRows; 
				} 
			} 
            
			//文本的高测量基宽为有效打印页的宽，因此会根据实际字符自动换行 
			RectangleF recF = new RectangleF(x,y,width,height); 
             
 
			StringFormat sf = new StringFormat(); 
 
			sf.Alignment = StringAlignment.Center;			//横向居中 
			sf.LineAlignment = StringAlignment.Center;		//竖向居中 
 
			#region	计算实际绘图区 
			//写绘制时的坐标信息 
			recF.X = (this.PrinterMargins.Width - this.TextWidth(this.Text))/2  + this.PrinterMargins.Left + this.MoveX; 
			recF.Y = y; 
			if (this.TextWidth(this.Text) < this.PrinterMargins.Width) 
			{ 
				recF.Width = this.TextWidth(this.Text);		 
			} 
			else 
			{ 
				recF.Width = this.PrinterMargins.Width;				 
			} 
 
			recF.Height = height;	 
 
			this.RectangleF = recF; 
			#endregion 
 
			//画上打印有效区的线 
			if (_hasborder) 
			{ 
				this.Graphics.DrawRectangle(Pens.Black,this.RectangleF.X,this.RectangleF.Y,this.RectangleF.Width,this.RectangleF.Height); 
			} 
 
			//输出文本 
			this.Graphics.DrawString(_text,this.Font,Brushes.Black,recF,sf); 
 
			this.Height = height; 
			 
		} 
 
 
	}//End Class 
}//End NameSpace