fontpanel.java

一个小公司要求给写的很简单的任务管理系统。

/*
 * @(#)FontPanel.java	1.20 05/11/17
 * 
 * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * -Redistribution of source code must retain the above copyright notice, this
 *  list of conditions and the following disclaimer.
 * 
 * -Redistribution in binary form must reproduce the above copyright notice, 
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors may 
 * be used to endorse or promote products derived from this software without 
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL 
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST 
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, 
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY 
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, 
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility.
 */

/*
 * @(#)FontPanel.java	1.20 05/11/17
 */

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.font.FontRenderContext;
import java.awt.font.GlyphVector;
import java.awt.font.LineBreakMeasurer;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.NoninvertibleTransformException;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterJob;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.text.AttributedString;
import java.util.EnumSet;
import java.util.Vector;

import javax.imageio.*;
import javax.swing.*;

import static java.awt.RenderingHints.*;

/**
 * FontPanel.java
 *
 * @version @(#)FontPanel.java	1.1 00/08/22
 * @author Shinsuke Fukuda
 * @author Ankit Patel [Conversion to Swing - 01/07/30] 
 */

/// This panel is combination of the text drawing area of Font2DTest
/// and the custom controlled scroll bar

public final class FontPanel extends JPanel implements AdjustmentListener {

    /// Drawing Option Constants
    private final String STYLES[] =
      { "plain", "bold", "italic", "bold italic" };

    private final int NONE = 0;
    private final int SCALE = 1;
    private final int SHEAR = 2;
    private final int ROTATE = 3;
    private final String TRANSFORMS[] =
      { "with no transforms", "with scaling", "with Shearing", "with rotation" };

    private final int DRAW_STRING = 0;
    private final int DRAW_CHARS = 1;
    private final int DRAW_BYTES = 2;
    private final int DRAW_GLYPHV = 3;
    private final int TL_DRAW = 4;
    private final int GV_OUTLINE = 5;
    private final int TL_OUTLINE = 6;
    private final String METHODS[] = {
        "drawString", "drawChars", "drawBytes", "drawGlyphVector",
        "TextLayout.draw", "GlyphVector.getOutline", "TextLayout.getOutline" };

    public final int RANGE_TEXT = 0;
    public final int ALL_GLYPHS = 1;
    public final int USER_TEXT = 2;
    public final int FILE_TEXT = 3;
    private final String MS_OPENING[] =
      { " Unicode ", " Glyph Code ", " lines ", " lines " };
    private final String MS_CLOSING[] =
      { "", "", " of User Text ", " of LineBreakMeasurer-reformatted Text " };

    /// General Graphics Variable
    private final JScrollBar verticalBar;
    private final FontCanvas fc;
    private boolean updateBackBuffer = true;
    private boolean updateFontMetrics = true;
    private boolean updateFont = true;
    private boolean force16Cols = false;
    public boolean showingError = false;
    private int g2Transform = NONE; /// ABP

    /// Printing constants and variables
    public final int ONE_PAGE = 0;
    public final int CUR_RANGE = 1;
    public final int ALL_TEXT = 2;
    private int printMode = ONE_PAGE;
    private PageFormat page = null;
    private PrinterJob printer = null;

    /// Text drawing variables
    private String fontName = "Dialog";
    private float fontSize = 12;
    private int fontStyle = Font.PLAIN;
    private int fontTransform = NONE;
    private Font testFont = null;
    private Object antiAliasType = VALUE_TEXT_ANTIALIAS_DEFAULT;
    private Object fractionalMetricsType = VALUE_FRACTIONALMETRICS_DEFAULT;
    private Object lcdContrast = getDefaultLCDContrast();
    private int drawMethod = DRAW_STRING;
    private int textToUse = RANGE_TEXT;
    private String userText[] = null;
    private String fileText[] = null;
    private int drawRange[] = { 0x0000, 0x007f };
    private String fontInfos[] = new String[2];
    private boolean showGrid = true;

    /// Parent Font2DTest panel
    private final Font2DTest f2dt;
    private final JFrame parent;

    public FontPanel( Font2DTest demo, JFrame f ) {
        f2dt = demo;
        parent = f;

        verticalBar = new JScrollBar ( JScrollBar.VERTICAL );
        fc = new FontCanvas();

        this.setLayout( new BorderLayout() );
        this.add( "Center", fc );
        this.add( "East", verticalBar );

        verticalBar.addAdjustmentListener( this );
        this.addComponentListener( new ComponentAdapter() {
            public void componentResized( ComponentEvent e ) {
                updateBackBuffer = true;
                updateFontMetrics = true;
            }
        });

        /// Initialize font and its infos
        testFont = new Font(fontName, fontStyle, (int)fontSize);
	if ((float)((int)fontSize) != fontSize) {
	    testFont = testFont.deriveFont(fontSize);
	}
        updateFontInfo();
    }

    public Dimension getPreferredSize() {
        return new Dimension(600, 200);
    }

    /// Functions called by the main programs to set the various parameters

    public void setTransformG2( int transform ) {
        g2Transform = transform;
        updateBackBuffer = true;
        updateFontMetrics = true;
        fc.repaint();
    }
    
    /// convenience fcn to create AffineTransform of appropriate type
    private AffineTransform getAffineTransform( int transform ) {
	    /// ABP
            AffineTransform at = new AffineTransform();
            switch ( transform )
            {
            case SCALE:
              at.setToScale( 1.5f, 1.5f ); break;
            case ROTATE:
              at.setToRotation( Math.PI / 6 ); break;
            case SHEAR:
              at.setToShear( 0.4f, 0 ); break;
            case NONE:
              break;
            default:
              //System.err.println( "Illegal G2 Transform Arg: " + transform); 
              break;
            }

     	    return at;            
    }

    public void setFontParams(Object obj, float size,
			      int style, int transform) {
        setFontParams( (String)obj, size, style, transform );
    }

    public void setFontParams(String name, float size,
			      int style, int transform) {
        boolean fontModified = false;
        if ( !name.equals( fontName ) || style != fontStyle )
          fontModified = true;

        fontName = name;
        fontSize = size;
        fontStyle = style;
        fontTransform = transform;

        /// Recreate the font as specified
        testFont = new Font(fontName, fontStyle, (int)fontSize);
	if ((float)((int)fontSize) != fontSize) {
	    testFont = testFont.deriveFont(fontSize);
	}

        if ( fontTransform != NONE ) {
            AffineTransform at = getAffineTransform( fontTransform );
            testFont = testFont.deriveFont( at );
        }
        updateBackBuffer = true;
        updateFontMetrics = true;
        fc.repaint();
        if ( fontModified ) {
            /// Tell main panel to update the font info
            updateFontInfo();
            f2dt.fireUpdateFontInfo();
        }
    }

    public void setRenderingHints( Object aa, Object fm, Object contrast) {
        antiAliasType = ((AAValues)aa).getHint();
        fractionalMetricsType = ((FMValues)fm).getHint();
	lcdContrast = contrast;
        updateBackBuffer = true;
        updateFontMetrics = true;
        fc.repaint();
    }

    public void setDrawMethod( int i ) {
        drawMethod = i;
        updateBackBuffer = true;
        fc.repaint();
    }

    public void setTextToDraw( int i, int range[],
                               String textSet[], String fileData[] ) {
        textToUse = i;

        if ( textToUse == RANGE_TEXT )
          drawRange = range;
        else if ( textToUse == ALL_GLYPHS )
          drawMethod = DRAW_GLYPHV;
        else if ( textToUse == USER_TEXT )
          userText = textSet;
        else if ( textToUse == FILE_TEXT ) {
            fileText = fileData;
            drawMethod = TL_DRAW;
        }

        updateBackBuffer = true;
        updateFontMetrics = true;
        fc.repaint();
        updateFontInfo();
    }

    public void setGridDisplay( boolean b ) {
        showGrid = b;
        updateBackBuffer = true;
        fc.repaint();
    }

    public void setForce16Columns( boolean b ) {
        force16Cols = b;
        updateBackBuffer = true;
        updateFontMetrics = true;
        fc.repaint();
    }

    /// Prints out the text display area
    public void doPrint( int i ) {
        if ( printer == null ) {
            printer = PrinterJob.getPrinterJob();
            page = printer.defaultPage();
        }
        printMode = i;
        printer.setPrintable( fc, page );

        if ( printer.printDialog() ) {
            try {
                printer.print();
            }
            catch ( Exception e ) {
                f2dt.fireChangeStatus( "ERROR: Printing Failed; See Stack Trace", true );
            }
        }
    }

    /// Displays the page setup dialog and updates PageFormat info
    public void doPageSetup() {
        if ( printer == null ) {
            printer = PrinterJob.getPrinterJob();
            page = printer.defaultPage();
        }
        page = printer.pageDialog( page );
    }

    /// Obtains the information about selected font
    private void updateFontInfo() {
        int numGlyphs = 0, numCharsInRange = drawRange[1] - drawRange[0] + 1;
        fontInfos[0] = "Font Face Name: " + testFont.getFontName();
        fontInfos[1] = "Glyphs in This Range: ";

        if ( textToUse == RANGE_TEXT ) {