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Java > Open Source Codes > edu > rice > cs > drjava > model > print > PagePrinter


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33
34 package edu.rice.cs.drjava.model.print;
35
36 import java.util.*;
37 import java.awt.print.*;
38 import java.awt.*;
39 import java.awt.font.*;
40
41 /**
42  * Class which represents a Printable object for a given
43  * page of the print job.
44  *
45  * @version $Id: PagePrinter.java 3901 2006-06-30 05:28:11Z rcartwright $
46  */
47 public class PagePrinter implements Printable {
48
49   // private int _page;
50 private ArrayList<TextLayout> _textLayouts;
51   private ArrayList<TextLayout> _lineNumbers;
52   private String JavaDoc _fileName;
53   private DrJavaBook _parent;
54
55   /**
56    * Constructs a PagePrinter for a given page number (which is ignored!), a
57    * given filename, and parent.
58    */
59   public PagePrinter(int page, String JavaDoc fileName, DrJavaBook parent) {
60     // _page = page;
61 _textLayouts = new ArrayList<TextLayout>();
62     _lineNumbers = new ArrayList<TextLayout>();
63     _fileName = fileName;
64     _parent = parent;
65   }
66
67   /**
68    * Method which adds a TextLayout (and lineNumber) to this
69    * page. This is designed to represent a physical line of
70    * text to be printed on the document (as opposed to a
71    * real line number.
72    * @param text The text of the given line.
73    * @param lineNumber The Text to write in the lineNumber location.
74    */
75   public void add(TextLayout text, TextLayout lineNumber) {
76     _textLayouts.add(text);
77     _lineNumbers.add(lineNumber);
78   }
79
80   /**
81    * Method to support the Printable interface. It prints the
82    * contents of this PagePrinter onto the Graphics object.
83    * @param graphics The Graphics object to print to.
84    * @param format The PageFormat to use.
85    * @param pageIndex The page number to print.
86    */
87   public int print(Graphics graphics, PageFormat format, int pageIndex) {
88     // Set up graphics object
89 Graphics2D g2d = (Graphics2D) graphics;
90     g2d.translate(format.getImageableX(), format.getImageableY());
91     g2d.setPaint(Color.black);
92
93     float y = 0;
94
95     // loop over the TextLayouts, printing out each one and the line number
96 for (int i=0; i<_textLayouts.size(); i++) {
97       TextLayout layout = _textLayouts.get(i);
98       TextLayout lineNumber = _lineNumbers.get(i);
99
100       y += layout.getAscent();
101       lineNumber.draw(g2d, 0, y);
102       layout.draw(g2d, _parent.LINE_NUM_WIDTH, y);
103       y += layout.getLeading();
104     }
105
106     // print the footer
107 printFooter(g2d, format, pageIndex + 1);
108
109     return PAGE_EXISTS;
110   }
111
112   /**
113    * Method which prints the footer onto the document
114    * @param g2d The Graphics2D object to print the footer to.
115    * @param format The PageFormat to use.
116    * @param page The page number to print.
117    */
118   private void printFooter(Graphics2D g2d, PageFormat format, int page) {
119     TextLayout footerFile = new TextLayout(_fileName, DrJavaBook.FOOTER_FONT, g2d.getFontRenderContext());
120     float footerPlace = (float) (format.getImageableWidth() - footerFile.getAdvance()) / 2;
121
122     footerFile.draw(g2d, footerPlace, (float) format.getImageableHeight() - footerFile.getDescent());
123
124     TextLayout footerPageNo = new TextLayout(page + "", DrJavaBook.FOOTER_FONT, g2d.getFontRenderContext());
125     footerPageNo.draw(g2d,
126                       (float) format.getImageableWidth() - footerPageNo.getAdvance(),
127                       (float) format.getImageableHeight() - footerPageNo.getDescent());
128   }
129
130 }
131
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