tablecliper.java

外国人写的Java打印程序

package printtable;

import java.awt.*;
import java.awt.print.*;

import java.util.*;

import java.text.*;

import javax.swing.*;
import javax.swing.table.*;

/**
 * Title:        PrintTable
 * Description:  A java jTable Print Programme.
 * Enable set the wighth and highth.
 * Copyright:    Copyright (c) 2002
 * Company:      TopShine
 * @author ghostliang
 * @version 1.0
 */

public class TableCliper implements Printable,Pageable{
  //variable for record the pageFormat
  private JTable table;

  private PageBorder head;
  private boolean showHead;
  private PageBorder foot;
  private boolean showFoot;

  private int headerStatus;
  private int tableAlignment;
  private int tableScale;

  private ExtPageFormat pageFormat;

  //init the class
  public TableCliper(JTable newTable,ExtPageFormat newPageFormat)
  {
    table = newTable;

    tableAlignment = newPageFormat.getTableAlignment();
    headerStatus = newPageFormat.getHeaderType();
    tableScale = newPageFormat.getTableScale();

    head = newPageFormat.getHead();
    foot = newPageFormat.getFoot();

    showHead = newPageFormat.getShowHead();
    showFoot = newPageFormat.getShowFoot();

    pageFormat = newPageFormat;
  }

  //overwrite the print function of the print
  public int print(Graphics newGraphics,PageFormat newPageFormat,int index)
  {
    Dimension size = null;

    if((table.getWidth() == 0) || (table.getHeight() == 0))
    {
      table.setSize(table.getPreferredSize());
    }

    int tableWidth = table.getWidth();
    int tableHeight = table.getHeight();
    int positionX = 0;
    int positionY = 0;

    int pageIndex = 0;
    while(positionY < tableHeight)
    {
      positionX = 0;
      while(positionX < tableWidth)
      {
        size = getPrintSize(positionX,positionY);
        if(pageIndex == index)
        {
          paintTable(newGraphics,positionX,positionY,size);
          return Printable.PAGE_EXISTS;
        }

        pageIndex++;
        positionX += size.width;
      }
      positionY += size.height;
    }
    return Printable.NO_SUCH_PAGE;
  }

  //get how much area this page to print
  protected Dimension getPrintSize(int positionX,int positionY)
  {
    Rectangle rect;

    int printWidth;
    int printHeight;

    int firstCol = table.columnAtPoint(new Point(positionX,positionY));
    int firstRow = table.columnAtPoint(new Point(positionX,positionY));

    int maxWidth = (int)(pageFormat.getImageableWidth() * 100 / tableScale);
    int maxHeight = (int)(pageFormat.getImageableHeight() * 100 / tableScale);

    if(displayHeaderOnPage(positionY))
    {
      maxHeight -= table.getTableHeader().getHeight();
    }

    int lastCol = table.columnAtPoint(new Point(positionX + maxWidth,positionY));
    if(lastCol == -1)
      printWidth = table.getWidth() - positionX;
    else
    {
      rect = table.getCellRect(0,lastCol - 1,true);
      printWidth = rect.x + rect.width - positionX;
    }

    int lastRow = table.rowAtPoint(new Point(positionX,positionY + maxHeight));
    if(lastRow == -1)
      printHeight = table.getHeight() - positionY;
    else
    {
      rect = table.getCellRect(lastRow - 1,0,true);
      printHeight = rect.y + rect.height - positionY;
    }

    return new Dimension(printWidth,printHeight);
  }

  //show the table on the PrintComponent
  protected void paintTable(Graphics newGraphics,int positionX,int positionY,
      Dimension size)
  {
    Graphics2D newGraphics2D = (Graphics2D)newGraphics;

    int allOffsetX = 0;
    int allOffsetY = 0;

    //if head is exist,show it on the paper
    if(showHead)
    {
      int headWidth = (int)head.getWidth();
      int headHeight = (int)head.getHeight();

      int headImageableX = (int)head.getImageableX();
      int headImageableY = (int)head.getImageableY();
      int headImageableWidth = (int)head.getImageableWidth();
      int headImageableHeight = (int)head.getImageableHeight();

      newGraphics.setColor(Color.white);
      newGraphics.fillRect(0,0,headWidth,headHeight);

      //print the border of the head
      if(head.getBorderType() == 0)
      {
        newGraphics.setColor(Color.black);
        newGraphics.drawLine(headImageableX,headImageableY + headImageableHeight,
          headImageableWidth + headImageableX,headImageableY + headImageableHeight);
      }
      else if(head.getBorderType() == 1)
      {
        newGraphics.setColor(Color.black);
        newGraphics.drawRect(headImageableX,headImageableY,
          headImageableWidth,headImageableHeight);
      }

      //print string of head
      StringBuffer content;
      StringBuffer bakContent;

      Date localDate  = new Date();
      SimpleDateFormat sdf =  new SimpleDateFormat ("yyyy-MM-dd");
      String localNowDate = sdf.format(localDate);

      if(head.leftContent != "")
      {
        content = new StringBuffer(head.leftContent);
        bakContent = new StringBuffer(head.leftContent);

        while( head.leftContent.indexOf('@') != -1
          && head.leftContent.indexOf('@') != head.leftContent.length() - 1)
        {
          int flag = head.leftContent.indexOf('@');
          switch(head.leftContent.charAt(flag + 1))
          {
            case 'd':
              content.replace(flag,flag + 2,localNowDate);
              head.leftContent = content.toString();
              break;
            case 'p':
              content.replace(flag,flag + 2,
                "" + this.getCurrentNumberOfPages(positionX,positionY));
              head.leftContent = content.toString();
              break;
            case 't':
              content.replace(flag,flag + 2,
                "" + this.getNumberOfPages());
              head.leftContent = content.toString();
              break;
            default:
              content.replace(flag,flag + 1,
                "#$");
              head.leftContent = content.toString();
              break;
          }
        }

        for(int index = 0;index < content.length() - 1;index++)
          if(content.charAt(index) == '#' && content.charAt(index + 1) == '$')
            content.replace(index,index + 2,"@");

        head.leftContent = bakContent.toString();

        newGraphics.setColor(Color.black);
        newGraphics.drawString(content.toString(),headImageableX + 10,headImageableY + (headImageableHeight / 2 + 6));
      }

      if(head.midContent != "")
      {
        content = new StringBuffer(head.midContent);
        bakContent = new StringBuffer(head.midContent);

        while( head.midContent.indexOf('@') != -1
          && head.midContent.indexOf('@') != head.midContent.length() - 1)
        {
          int flag = head.midContent.indexOf('@');
          switch(head.midContent.charAt(flag + 1))
          {
            case 'd':
              content.replace(flag,flag + 2,localNowDate);
              head.midContent = content.toString();
              break;
            case 'p':
              content.replace(flag,flag + 2,
                "" + this.getCurrentNumberOfPages(positionX,positionY));
              head.midContent = content.toString();
              break;
            case 't':
              content.replace(flag,flag + 2,
                "" + this.getNumberOfPages());
              head.midContent = content.toString();
              break;
            default:
              content.replace(flag,flag + 1,
                "#$");
              head.midContent = content.toString();
              break;
          }
        }

        for(int index = 0;index < content.length() - 1;index++)
          if(content.charAt(index) == '#' && content.charAt(index + 1) == '$')
            content.replace(index,index + 2,"@");

        head.midContent = bakContent.toString();

        newGraphics.setColor(Color.black);
        newGraphics.drawString(content.toString(),headImageableX + (headImageableWidth / 2) - content.toString().length() * 4,headImageableY + (headImageableHeight / 2 + 6));
      }

      if(head.rightContent != "")
      {
        content = new StringBuffer(head.rightContent);
        bakContent = new StringBuffer(head.rightContent);

        while( head.rightContent.indexOf('@') != -1
          && head.rightContent.indexOf('@') != head.rightContent.length() - 1)
        {
          int flag = head.rightContent.indexOf('@');
          switch(head.rightContent.charAt(flag + 1))
          {
            case 'd':
              content.replace(flag,flag + 2,localNowDate);
              head.rightContent = content.toString();
              break;
            case 'p':
              content.replace(flag,flag + 2,
                "" + this.getCurrentNumberOfPages(positionX,positionY));
              head.rightContent = content.toString();
              break;
            case 't':
              content.replace(flag,flag + 2,
                "" + this.getNumberOfPages());
              head.rightContent = content.toString();
              break;
            default:
              content.replace(flag,flag + 1,
                "#$");
              head.rightContent = content.toString();
              break;
          }
        }

        for(int index = 0;index < content.length() - 1;index++)
          if(content.charAt(index) == '#' && content.charAt(index + 1) == '$')
            content.replace(index,index + 2,"@");

        head.rightContent = bakContent.toString();

        newGraphics.setColor(Color.black);
        newGraphics.drawString(content.toString(),headImageableX + headImageableWidth - content.toString().length() * 8,headImageableY + (headImageableHeight / 2 + 6));
      }

      newGraphics.translate(0,headHeight);
      allOffsetX += 0;
      allOffsetY += headHeight;
    }

    //print the main paper
    //a offset from the border of the paper
    int offsetX = (int)(pageFormat.getImageableX());
    int offsetY = (int)(pageFormat.getImageableY());

    //the size of the paper
    int paperWidth = (int)(pageFormat.getWidth());
    int paperHeight = (int)(pageFormat.getHeight());

    //draw main paper
    newGraphics.setColor(Color.white);
    newGraphics.fillRect(0,0,paperWidth,paperHeight);

    //save the clip
    Rectangle clipRect = newGraphics.getClipBounds();

    //offset for alignment
    //size measured as table scale,so you must consider with table scale here
    if(tableAlignment == 1)
      newGraphics.translate((int)((pageFormat.getImageableWidth() - (double)(size.width * tableScale / 100))/2),0);
    else if(tableAlignment == 2)
      newGraphics.translate((int)(pageFormat.getImageableWidth() - (double)(size.width * tableScale / 100)),0);