form2.cs

自己写的多窗口文本编辑器

			int y = 0;
			int ss = 0;
			while (ss<textBox1.SelectionStart)
			{
				if (ss+textBox1.Lines[y].Length+2<=textBox1.SelectionStart)
				{
					ss += textBox1.Lines[y].Length+2;
					y++;
				}
				else
				{
					x = textBox1.SelectionStart -ss;
					break;
				}

			}
			return new Point(x+1, y+1);
		}

		private void miColor_Click(object sender, System.EventArgs e)
		{
			if(colorDialog1.ShowDialog()==DialogResult.OK)
			{
				textBox1.ForeColor =colorDialog1.Color ;
			}
		}

		public void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
		{
			switch(e.Button .Tag .ToString ())
			{
				case "tbtnCopy":textBox1.Copy ();
					break;
				case "tbtnCut": textBox1.Cut();
					break;
				case "tbtnPaste":textBox1.Paste ();
					break;
				case "tbPreview":
					ppDialog.ShowDialog();
					break;
				case "tbPrint":
					pDoc.Print();
					break;
			}
			
			
		}

		/*private void miWindow_Popup(object sender, System.EventArgs e)
		{
			for(int i=0;i<miWindow.MenuItems .Count ;i++)
			miWindow.MenuItems [i].Enabled =this.MdiChildren .Length >0;
		}*/



		private void miCopy_Click(object sender, System.EventArgs e)
		{
			textBox1.Copy();
		}

		private void miCut_Click(object sender, System.EventArgs e)
		{
			textBox1.Cut();
		}

		private void miPaste_Click(object sender, System.EventArgs e)
		{
			textBox1.Paste();
		}

		private void miSelectAll_Click(object sender, System.EventArgs e)
		{
			textBox1.SelectAll();
		}

		private void conCopy_Click(object sender, System.EventArgs e)
		{
		    textBox1.Copy();
		}

		private void conPaste_Click(object sender, System.EventArgs e)
		{
			textBox1.Paste();
		
		}

		private void conCut_Click(object sender, System.EventArgs e)
		{
			textBox1.Cut();
		
		}

		private void conSelectAll_Click(object sender, System.EventArgs e)
		{
		    textBox1.SelectAll();
		}


		private void pDoc_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
		{
			if (manuscript)
				PrintDocOnManuscript(e);
			else
				PrintDoc(e);

		}

		int paraNo = 0;		// 当前段落序号
		int pageNo = 1;		// 当前页号
		int totalPages = 1; // 总页数
		int leftLines = 0;	// 段落跨页时，在下一页的行数
		bool manuscript = true;
		int cy = 0; // 文本段落计数
		int cx = 0; // 段落内字符计数

		// 非稿纸方式
		private void PrintDoc(System.Drawing.Printing.PrintPageEventArgs e)
		{
			Font fontPara = new Font("宋体",12);	// 正文字体
			Font fontHF = new Font("宋体",9);		// 页眉/脚字体

			Brush brushPara = Brushes.Black;		// 正文画刷

			Pen penHF = Pens.Silver;				// 页眉/脚画笔（用于画线等）
			Brush brushHF = Brushes.Silver;			// 页眉/脚画刷

			// 打印页眉
			e.Graphics.DrawString(fileName, fontHF, brushHF, new PointF(e.MarginBounds.Left, e.MarginBounds.Top - fontHF.GetHeight(e.Graphics)-5));
			e.Graphics.DrawLine(penHF,e.MarginBounds.Left,e.MarginBounds.Top-4,e.MarginBounds.Right,e.MarginBounds.Top-4);

			RectangleF f;
			SizeF s;

			float lineHeight = fontPara.GetHeight(e.Graphics);				// 行高
			int linesPerPage = (int)(e.MarginBounds.Height / lineHeight);	// 每页行数

			// 计算总页数
			int totalLines = 0;
			if (pageNo == 1)
			{
				for(int i=0; i<textBox1.Lines.Length; i++)
				{
					s = e.Graphics.MeasureString(textBox1.Lines[i], fontPara, e.MarginBounds.Width);
					totalLines += (int)(s.Height/lineHeight);
				}
				totalPages = totalLines/linesPerPage + (totalLines%linesPerPage==0?0:1);
			}

			// 打印页脚
			string footer = "第" + pageNo.ToString() + "页 共" + totalPages.ToString() + "页";
			SizeF sf = e.Graphics.MeasureString(footer,fontHF);
			e.Graphics.DrawString(footer, fontHF, brushHF, new PointF((e.PageBounds.Width - sf.Width) / 2, e.MarginBounds.Bottom + 2));

			int lineNo = 0; // 行计数

			// 打印上页剩余的部分
			f = e.MarginBounds;
			f.Inflate(1,1);
			e.Graphics.SetClip(f);
			if (leftLines>0)
			{
				s = e.Graphics.MeasureString(textBox1.Lines[paraNo], fontPara, e.MarginBounds.Width);
				f = new RectangleF(e.MarginBounds.Left, e.MarginBounds.Top, s.Width, s.Height);
				f.Offset(0,-(s.Height-leftLines*lineHeight));
				e.Graphics.DrawString(textBox1.Lines[paraNo], fontPara, brushPara, f);
				lineNo = leftLines;
				paraNo++;
			}

			while (paraNo<textBox1.Lines.Length)
			{
				// 求当前段落打印行数
				s = e.Graphics.MeasureString(textBox1.Lines[paraNo], fontPara, e.MarginBounds.Width);
				int strLines = (int)(s.Height/lineHeight);

				// 求实际要打印当前段落的行数
				int pLines;
				if (lineNo + strLines <= linesPerPage)
				{
					pLines = strLines;
					f = new RectangleF(e.MarginBounds.Left, e.MarginBounds.Top + lineNo * lineHeight, s.Width, s.Height);
				}
				else
				{
					pLines = (linesPerPage - lineNo);
					f = new RectangleF(e.MarginBounds.Left, e.MarginBounds.Top + lineNo * lineHeight, s.Width, pLines*lineHeight);

				}
				// 打印当前段落的前 pLines 行
				e.Graphics.DrawString(textBox1.Lines[paraNo], fontPara, brushPara, f);

				lineNo += pLines;

				// 判断是否已打印完一页
				if (lineNo == linesPerPage && paraNo+1 < textBox1.Lines.Length)
				{
					e.HasMorePages = true;
					leftLines = strLines - pLines;
					if (leftLines==0) paraNo++;
					break;
				}
				paraNo++;
			}
			pageNo++;
		}


		private void PrintDocOnManuscript(System.Drawing.Printing.PrintPageEventArgs e)
		{
			Font fontPara = new Font("宋体",12);	// 正文字体
			Font fontHF = new Font("宋体",9);		// 页眉/脚字体

			Brush brushPara = Brushes.Black;		// 正文画刷

			Pen penHF = Pens.Silver;				// 页眉/脚画笔（用于画线等）
			Brush brushHF = Brushes.Silver;			// 页眉/脚画刷

			// 打印页眉
			e.Graphics.DrawString(fileName, fontHF, brushHF, new PointF(e.MarginBounds.Left, e.MarginBounds.Top - fontHF.GetHeight(e.Graphics)-5));
			e.Graphics.DrawLine(penHF,e.MarginBounds.Left,e.MarginBounds.Top-4,e.MarginBounds.Right,e.MarginBounds.Top-4);

			// 测量一个测字的尺寸，用于决定格子的大小
			SizeF s = e.Graphics.MeasureString("好", fontPara);
			int gridSize = (int)Math.Max(s.Height, s.Width) + 2;	// 格子尺寸
			int dy = gridSize - (int)s.Height + 2;					// 文字与格子顶线的距离

			int lineHeight = 3*gridSize/2;							// 行高
			int linesPerPage = e.MarginBounds.Height / lineHeight;	// 每页行数
			int charsPerPage = e.MarginBounds.Width / gridSize;		// 每行字符数

			// 求总页数
			if (pageNo==1)
			{
				int lines = 0;
				for(int i=0; i<textBox1.Lines.Length; i++)
				{
					if(textBox1.Lines[i].Length == 0) // 空行
						lines++;
					else
						lines += textBox1.Lines[i].Length/charsPerPage + (textBox1.Lines[i].Length%charsPerPage==0?0:1);
				}
				totalPages = lines/linesPerPage + (lines%linesPerPage==0?0:1);
			}
			// 左边距
			int marginLeft = e.MarginBounds.Left + (e.MarginBounds.Width - (charsPerPage*gridSize))/2;
			// 画格子
			for(int i=0; i<linesPerPage; i++)
				for(int j=0; j<charsPerPage; j++)
					e.Graphics.DrawRectangle(penHF, marginLeft + j*gridSize, e.MarginBounds.Top+i*lineHeight, gridSize, gridSize);
			// 画外框
			e.Graphics.DrawRectangle(penHF, marginLeft, e.MarginBounds.Top, gridSize*charsPerPage, lineHeight*linesPerPage);

			// 打印页脚
			string footer = "第" + pageNo.ToString() + "页 共" + totalPages.ToString() + "页";
			SizeF sf = e.Graphics.MeasureString(footer,fontHF);
			e.Graphics.DrawString(footer, fontHF, brushHF, new PointF((e.PageBounds.Width - sf.Width) / 2, e.MarginBounds.Bottom + 2));

			footer = linesPerPage.ToString() + "行 × " + charsPerPage.ToString() + "列 = "+(linesPerPage*charsPerPage).ToString()+"字";
			sf = e.Graphics.MeasureString(footer,fontHF);
			e.Graphics.DrawString(footer, fontHF, brushHF, new PointF(e.MarginBounds.Right - sf.Width, e.MarginBounds.Bottom + 2));

			// 打印文本
			int r = 0;	// 稿纸上的当前行计数
			int c;		// 稿纸上的当前行字符计数
			while (cy<textBox1.Lines.Length)
			{
				c = 0;
				while (cx<textBox1.Lines[cy].Length && c<charsPerPage)
				{
					s = e.Graphics.MeasureString(textBox1.Lines[cy].Substring(cx,1), fontPara);
					e.Graphics.DrawString(textBox1.Lines[cy].Substring(cx,1), fontPara, brushPara, marginLeft + c*gridSize + 1, r*lineHeight+e.MarginBounds.Top + dy);
					c++;
					cx++;
				}
				if (cx>=textBox1.Lines[cy].Length)
				{
					cx = 0;
					cy++;
				}
				r++;

				// 判断是否已打印完一页
				if (r == linesPerPage)
				{
					if (cy < textBox1.Lines.Length-1 || cy < textBox1.Lines.Length && cx < textBox1.Lines[cy].Length)
						e.HasMorePages = true;
					break;
				}
			}
			pageNo++;
		}

		private void Form2_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			if (textBox1.Modified)
			{
				DialogResult dr = MessageBox.Show(this,"文件："+fileName+"\r\n已被修改，是否要保存？","提示",MessageBoxButtons.YesNoCancel,MessageBoxIcon.Warning);
				switch(dr)
				{
					case DialogResult.Yes:
						break;
					case DialogResult.Cancel:
						e.Cancel = true;
						break;
				}
			}
		}
		
	}
}