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


using System;
using System.Drawing;

namespace GoldPrinter
{
/// <summary>
/// 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★★★★★
/// </summary>
public class Caption:Printer
{
private string _text; //文本
private int _maxRows; //限制行数
private bool _hasborder; //画边框

/// <summary>
/// 默认构造函数
/// </summary>
public Caption()
{
//初始值
_text = "";
_maxRows = 1;
_hasborder = false;
this.Font = new Font("宋体",13,FontStyle.Italic); //字体

this.IsDrawAllPage = true;
}

/// <summary>
/// 子标题构造函数
/// </summary>
/// <param name="text"></param>
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;}
}

/// <summary>
/// 限制行数，小于0为不限制
/// </summary>
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