font2dtest.java

一个小公司要求给写的很简单的任务管理系统。

        printDialog.pack();

        /// Prepare font information dialog...
        fontInfoDialog = new JDialog( parent, "Font info", false );
        fontInfoDialog.setResizable( false );
        fontInfoDialog.addWindowListener( new WindowAdapter() {
            public void windowClosing( WindowEvent e ) {
                fontInfoDialog.hide();
                showFontInfoCBMI.setState( false );
            }
        });
        JPanel fontInfoPanel = new JPanel();
        fontInfoPanel.setLayout( new GridLayout( fontInfos.length, 1 ));
        for ( int i = 0; i < fontInfos.length; i++ ) {
            fontInfos[i] = new LabelV2("");
            fontInfoPanel.add( fontInfos[i] );
        }
        fontInfoDialog.getContentPane().add( fontInfoPanel );

        /// Move the location of the dialog...
        userTextDialog.setLocation( 200, 300 );
        fontInfoDialog.setLocation( 0, 400 );
    }

    /// RangeMenu object signals using this function
    /// when Unicode range has been changed and text needs to be redrawn
    public void fireRangeChanged() {
        int range[] = rm.getSelectedRange();
        fp.setTextToDraw( fp.RANGE_TEXT, range, null, null );
        if(canDisplayCheck) {
            setupFontList(range[0], range[1]);
        }
        if ( showFontInfoCBMI.getState() )
          fireUpdateFontInfo();
    }

    /// Changes the message on the status bar
    public void fireChangeStatus( String message, boolean error ) {
        /// If this is not ran as an applet, use own status bar,
        /// Otherwise, use the appletviewer/browser's status bar
        statusBar.setText( message );
        if ( error )
          fp.showingError = true;
        else
          fp.showingError = false;
    }

    /// Updates the information about the selected font
    public void fireUpdateFontInfo() {
        if ( showFontInfoCBMI.getState() ) {
            String infos[] = fp.getFontInfo();
            for ( int i = 0; i < fontInfos.length; i++ )
              fontInfos[i].setText( infos[i] );
            fontInfoDialog.pack();
        }
    }

    private void setupFontList(int rangeStart, int rangeEnd) {
        
        int listCount = fontMenu.getItemCount();
        int size = 16;

        try {
            size =  Float.valueOf(sizeField.getText()).intValue();
        } 
        catch ( Exception e ) {
            System.out.println("Invalid font size in the size textField. Using default value of 16");
        }

        int style = fontStyles[styleMenu.getSelectedIndex()];
        Font f;
        for (int i = 0; i < listCount; i++) {
            String fontName = (String)fontMenu.getItemAt(i);
            f = new Font(fontName, style, size);
            if ((rm.getSelectedIndex() != RangeMenu.SURROGATES_AREA_INDEX) &&
                canDisplayRange(f, rangeStart, rangeEnd)) {
                fontMenu.setBit(i, true);
            }
            else {
                fontMenu.setBit(i, false);
            }
        }

        fontMenu.repaint();
    }

    protected boolean canDisplayRange(Font font, int rangeStart, int rangeEnd) {
        for (int i = rangeStart; i < rangeEnd; i++) {
            if (font.canDisplay(i)) {
                return true;
            }
        }
        return false;
    }

    /// Displays a file load/save dialog and returns the specified file
    private String promptFile( boolean isSave, String initFileName ) {
	int retVal;
	String str;
	
	/// ABP
	if ( filePromptDialog == null)
		return null;
	
        if ( isSave ) {
            filePromptDialog.setDialogType( JFileChooser.SAVE_DIALOG );
            filePromptDialog.setDialogTitle( "Save..." );
            str = "Save";


        }
        else {
            filePromptDialog.setDialogType( JFileChooser.OPEN_DIALOG );
            filePromptDialog.setDialogTitle( "Load..." );
            str = "Load";
        }
        
	if (initFileName != null)
		filePromptDialog.setSelectedFile( new File( initFileName ) );        
	retVal = filePromptDialog.showDialog( this, str );

        if ( retVal == JFileChooser.APPROVE_OPTION ) {
	        File file = filePromptDialog.getSelectedFile();
	        String fileName = file.getAbsolutePath();
        	if ( fileName != null ) {
		        return fileName;
		}
	}
	
        return null;
    }

    /// Converts user text into arrays of String, delimited at newline character
    /// Also replaces any valid escape sequence with appropriate unicode character
    /// Support \\UXXXXXX notation for surrogates
    private String[] parseUserText( String orig ) {
        int length = orig.length();
        StringTokenizer perLine = new StringTokenizer( orig, "\n" );
        String textLines[] = new String[ perLine.countTokens() ];
        int lineNumber = 0;

        while ( perLine.hasMoreElements() ) {
            StringBuffer converted = new StringBuffer();
            String oneLine = perLine.nextToken();
            int lineLength = oneLine.length();
            int prevEscapeEnd = 0;
            int nextEscape = -1;
            do {
                int nextBMPEscape = oneLine.indexOf( "\\u", prevEscapeEnd );
                int nextSupEscape = oneLine.indexOf( "\\U", prevEscapeEnd );
                nextEscape = (nextBMPEscape < 0)
                    ? ((nextSupEscape < 0)
                       ? -1
                       : nextSupEscape)
                    : ((nextSupEscape < 0)
                       ? nextBMPEscape
                       : Math.min(nextBMPEscape, nextSupEscape));

                if ( nextEscape != -1 ) {
                    if ( prevEscapeEnd < nextEscape )
                        converted.append( oneLine.substring( prevEscapeEnd, nextEscape ));
                    
                    prevEscapeEnd = nextEscape + (nextEscape == nextBMPEscape ? 6 : 8);
                    try {
                        String hex = oneLine.substring( nextEscape + 2, prevEscapeEnd );
                        if (nextEscape == nextBMPEscape) {
                            converted.append( (char) Integer.parseInt( hex, 16 ));
                        } else {
                            converted.append( new String( Character.toChars( Integer.parseInt( hex, 16 ))));
                        }
                    }
                    catch ( Exception e ) {
                        int copyLimit = Math.min(lineLength, prevEscapeEnd);
                        converted.append( oneLine.substring( nextEscape, copyLimit ));
                    }
                }
            } while (nextEscape != -1);
            if ( prevEscapeEnd < lineLength )
              converted.append( oneLine.substring( prevEscapeEnd, lineLength ));
            textLines[ lineNumber++ ] = converted.toString();
        }
        return textLines;
    }

    /// Reads the text from specified file, detecting UTF-16 encoding
    /// Then breaks the text into String array, delimited at every line break
    private void readTextFile( String fileName ) {
        try {
            String fileText, textLines[];
            BufferedInputStream bis =
              new BufferedInputStream( new FileInputStream( fileName ));
            int numBytes = bis.available();
            if (numBytes == 0) {
                throw new Exception("Text file " + fileName + " is empty");
            }
            byte byteData[] = new byte[ numBytes ];
            bis.read( byteData, 0, numBytes );
            bis.close();

            /// If byte mark is found, then use UTF-16 encoding to convert bytes...
            if (numBytes >= 2 &&
                (( byteData[0] == (byte) 0xFF && byteData[1] == (byte) 0xFE ) ||
                 ( byteData[0] == (byte) 0xFE && byteData[1] == (byte) 0xFF )))
              fileText = new String( byteData, "UTF-16" );
            /// Otherwise, use system default encoding
            else
              fileText = new String( byteData );

            int length = fileText.length();
            StringTokenizer perLine = new StringTokenizer( fileText, "\n" );
            /// Determine "Return Char" used in this file
            /// This simply finds first occurrence of CR, CR+LF or LF...
            for ( int i = 0; i < length; i++ ) {
                char iTh = fileText.charAt( i );
                if ( iTh == '\r' ) {
                    if ( i < length - 1 && fileText.charAt( i + 1 ) == '\n' )
                      perLine = new StringTokenizer( fileText, "\r\n" );
                    else
                      perLine = new StringTokenizer( fileText, "\r" );
                    break;
                }
                else if ( iTh == '\n' )
                  /// Use the one already created
                  break;
            }
            int lineNumber = 0, numLines = perLine.countTokens();
            textLines = new String[ numLines ];

            while ( perLine.hasMoreElements() ) {
                String oneLine = perLine.nextToken();
                if ( oneLine == null )
                  /// To make LineBreakMeasurer to return a valid TextLayout
                  /// on an empty line, simply feed it a space char...
                  oneLine = " ";
                textLines[ lineNumber++ ] = oneLine;
            }
            fp.setTextToDraw( fp.FILE_TEXT, null, null, textLines );
            rm.setEnabled( false );
            methodsMenu.setEnabled( false );
        }
        catch ( Exception ex ) {
            fireChangeStatus( "ERROR: Failed to Read Text File; See Stack Trace", true );
            ex.printStackTrace();
        }
    }

    /// Returns a String storing current configuration
    private void writeCurrentOptions( String fileName ) {
        try {
            String curOptions = fp.getCurrentOptions();
            BufferedOutputStream bos =
              new BufferedOutputStream( new FileOutputStream( fileName ));
            /// Prepend title and the option that is only obtainable here
            int range[] = rm.getSelectedRange();
            String completeOptions =
              ( "Font2DTest Option File\n" + 
                displayGridCBMI.getState() + "\n" +
                force16ColsCBMI.getState() + "\n" +
                showFontInfoCBMI.getState() + "\n" +
                rm.getSelectedItem() + "\n" +
                range[0] + "\n" + range[1] + "\n" + curOptions + tFileName);
            byte toBeWritten[] = completeOptions.getBytes( "UTF-16" );
            bos.write( toBeWritten, 0, toBeWritten.length );
            bos.close();
        }
        catch ( Exception ex ) {
            fireChangeStatus( "ERROR: Failed to Save Options File; See Stack Trace", true );
            ex.printStackTrace();
        }
    }

    /// Updates GUI visibility/status after some parameters have changed
    private void updateGUI() {
        int selectedText = textMenu.getSelectedIndex();

        /// Set the visibility of User Text dialog
        if ( selectedText == fp.USER_TEXT )
          userTextDialog.show();
        else
          userTextDialog.hide();
        /// Change the visibility/status/availability of Print JDialog buttons
        printModeCBs[ fp.ONE_PAGE ].setSelected( true );
        if ( selectedText == fp.FILE_TEXT || selectedText == fp.USER_TEXT ) {
	    /// ABP
	    /// update methodsMenu to show that TextLayout.draw is being used
	    /// when we are in FILE_TEXT mode
	    if ( selectedText == fp.FILE_TEXT )
	        methodsMenu.setSelectedItem("TextLayout.draw");         
            methodsMenu.setEnabled( selectedText == fp.USER_TEXT );
            printModeCBs[ fp.CUR_RANGE ].setEnabled( false );
            printModeCBs[ fp.ALL_TEXT ].setEnabled( true );
        }
        else {
	    /// ABP
	    /// update methodsMenu to show that drawGlyph is being used
	    /// when we are in ALL_GLYPHS mode
	    if ( selectedText == fp.ALL_GLYPHS )
	        methodsMenu.setSelectedItem("drawGlyphVector"); 
            methodsMenu.setEnabled( selectedText == fp.RANGE_TEXT );
            printModeCBs[ fp.CUR_RANGE ].setEnabled( true );
            printModeCBs[ fp.ALL_TEXT ].setEnabled( false );
        }
        /// Modify RangeMenu and fontInfo label availabilty
        if ( selectedText == fp.RANGE_TEXT ) {
            fontInfos[1].setVisible( true );
            rm.setEnabled( true );
        }
        else {
            fontInfos[1].setVisible( false );
            rm.setEnabled( false );
        }
    }

    /// Loads saved options and applies them
    private void loadOptions( String fileName ) {
        try {
            BufferedInputStream bis =
              new BufferedInputStream( new FileInputStream( fileName ));
            int numBytes = bis.available();
            byte byteData[] = new byte[ numBytes ];
            bis.read( byteData, 0, numBytes );
            bis.close();
            if ( numBytes < 2 || 
		(byteData[0] != (byte) 0xFE || byteData[1] != (byte) 0xFF) )
              throw new Exception( "Not a Font2DTest options file" );
            
            String options = new String( byteData, "UTF-16" );
            StringTokenizer perLine = new StringTokenizer( options, "\n" );
            String title = perLine.nextToken();
            if ( !title.equals( "Font2DTest Option File" ))
              throw new Exception( "Not a Font2DTest options file" );

            /// Parse all options
            boolean displayGridOpt = Boolean.parseBoolean( perLine.nextToken() );
            boolean force16ColsOpt = Boolean.parseBoolean( perLine.nextToken() );
            boolean showFontInfoOpt = Boolean.parseBoolean( perLine.nextToken() );
            String rangeNameOpt = perLine.nextToken();
            int rangeStartOpt = Integer.parseInt( perLine.nextToken() );
            int rangeEndOpt = Integer.parseInt( perLine.nextToken() );
            String fontNameOpt = perLine.nextToken();
            float fontSizeOpt = Float.parseFloat( perLine.nextToken() );
            int fontStyleOpt = Integer.parseInt( perLine.nextToken() );
            int fontTransformOpt = Integer.parseInt( perLine.nextToken() );
            int g2TransformOpt = Integer.parseInt( perLine.nextToken() );
            int textToUseOpt = Integer.parseInt( perLine.nextToken() );
            int drawMethodOpt = Integer.parseInt( perLine.nextToken() );
            int antialiasOpt = Integer.parseInt(perLine.nextToken());
            int fractionalOpt = Integer.parseInt(perLine.nextToken());
            int lcdContrast = Integer.parseInt(perLine.nextToken());
            String userTextOpt[] = { "Java2D!" }, dialogEntry = "Java2D!";
            if (textToUseOpt == fp.USER_TEXT )  {
                int numLines = perLine.countTokens(), lineNumber = 0;
                if ( numLines != 0 ) {
                    userTextOpt = new String[ numLines ];
                    dialogEntry = "";
                    for ( ; perLine.hasMoreElements(); lineNumber++ ) {
                        userTextOpt[ lineNumber ] = perLine.nextToken();
                        dialogEntry += userTextOpt[ lineNumber ] + "\n";
                    }
                }
	    }			

            /// Reset GUIs
            displayGridCBMI.setState( displayGridOpt );
            force16ColsCBMI.setState( force16ColsOpt );
            showFontInfoCBMI.setState( showFontInfoOpt );
            rm.setSelectedRange( rangeNameOpt, rangeStartOpt, rangeEndOpt );
            fontMenu.setSelectedItem( fontNameOpt );
            sizeField.setText( String.valueOf( fontSizeOpt ));
            styleMenu.setSelectedIndex( fontStyleOpt );
            transformMenu.setSelectedIndex( fontTransformOpt );
            transformMenuG2.setSelectedIndex( g2TransformOpt );
            textMenu.setSelectedIndex( textToUseOpt );
            methodsMenu.setSelectedIndex( drawMethodOpt );
            antiAliasMenu.setSelectedIndex( antialiasOpt );
            fracMetricsMenu.setSelectedIndex( fractionalOpt );	  
	    contrastSlider.setValue(lcdContrast);

            userTextArea.setText( dialogEntry );
            updateGUI();

	    if ( textToUseOpt == fp.FILE_TEXT ) {
	      tFileName = perLine.nextToken();
	      readTextFile(tFileName );
            }

            /// Reset option variables and repaint
            fp.loadOptions( displayGridOpt, force16ColsOpt,
			    rangeStartOpt, rangeEndOpt,
                            fontNameOpt, fontSizeOpt,
			    fontStyleOpt, fontTransformOpt, g2TransformOpt,
                            textToUseOpt, drawMethodOpt,
			    antialiasOpt, fractionalOpt,
			    lcdContrast, userTextOpt );