Java example source code file (FontPanel.java)
The FontPanel.java Java example source code
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*
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*
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/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
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
*
* @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 ) {
for ( int i = drawRange[0]; i < drawRange[1]; i++ )
if ( testFont.canDisplay( i ))
numGlyphs++;
fontInfos[1] = fontInfos[1] + numGlyphs + " / " + numCharsInRange;
}
else
fontInfos[1] = null;
}
/// Accessor for the font information
public String[] getFontInfo() {
return fontInfos;
}
/// Collects the currectly set options and returns them as string
public String getCurrentOptions() {
/// Create a new String to store the options
/// The array will contain all 8 setting (font name, size...) and
/// character range or user text data used (no file text data)
int userTextSize = 0;
String options;
options = ( fontName + "\n" + fontSize + "\n" + fontStyle + "\n" +
fontTransform + "\n" + g2Transform + "\n"+
textToUse + "\n" + drawMethod + "\n" +
AAValues.getHintVal(antiAliasType) + "\n" +
FMValues.getHintVal(fractionalMetricsType) + "\n" +
lcdContrast + "\n");
if ( textToUse == USER_TEXT )
for ( int i = 0; i < userText.length; i++ )
options += ( userText[i] + "\n" );
return options;
}
/// Reload all options and refreshes the canvas
public void loadOptions( boolean grid, boolean force16, int start, int end,
String name, float size, int style,
int transform, int g2transform,
int text, int method, int aa, int fm,
int contrast, String user[] ) {
int range[] = { start, end };
/// Since repaint call has a low priority, these functions will finish
/// before the actual repainting is done
setGridDisplay( grid );
setForce16Columns( force16 );
// previous call to readTextFile has already set the text to draw
if (textToUse != FILE_TEXT) {
setTextToDraw( text, range, user, null );
}
setFontParams( name, size, style, transform );
setTransformG2( g2transform ); // ABP
setDrawMethod( method );
setRenderingHints(AAValues.getValue(aa), FMValues.getValue(fm),
new Integer(contrast));
}
/// Writes the current screen to PNG file
public void doSavePNG( String fileName ) {
fc.writePNG( fileName );
}
/// When scrolled using the scroll bar, update the backbuffer
public void adjustmentValueChanged( AdjustmentEvent e ) {
updateBackBuffer = true;
fc.repaint();
}
public void paintComponent( Graphics g ) {
// Windows does not repaint correctly, after
// a zoom. Thus, we need to force the canvas
// to repaint, but only once. After the first repaint,
// everything stabilizes. [ABP]
fc.repaint();
}
/// Inner class definition...
/// Inner panel that holds the actual drawing area and its routines
private class FontCanvas extends JPanel implements MouseListener, MouseMotionListener, Printable {
/// Number of characters that will fit across and down this canvas
private int numCharAcross, numCharDown;
/// First and last character/line that will be drawn
/// Limit is the end of range/text where no more draw will be done
private int drawStart, drawEnd, drawLimit;
/// FontMetrics variables
/// Here, gridWidth is equivalent to maxAdvance (slightly bigger though)
/// and gridHeight is equivalent to lineHeight
private int maxAscent, maxDescent, gridWidth = 0, gridHeight = 0;
/// Offset from the top left edge of the canvas where the draw will start
private int canvasInset_X = 5, canvasInset_Y = 5;
/// Offscreen buffer of this canvas
private BufferedImage backBuffer = null;
/// LineBreak'ed TextLayout vector
private Vector lineBreakTLs = null;
/// Whether the current draw command requested is for printing
private boolean isPrinting = false;
/// Other printing infos
private int lastPage, printPageNumber, currentlyShownChar = 0;
private final int PR_OFFSET = 10;
private final int PR_TITLE_LINEHEIGHT = 30;
/// Information about zooming (used with range text draw)
private final JWindow zoomWindow;
private BufferedImage zoomImage = null;
private int mouseOverCharX = -1, mouseOverCharY = -1;
private int currMouseOverChar = -1, prevZoomChar = -1;
private float ZOOM = 2.0f;
private boolean nowZooming = false;
private boolean firstTime = true;
// ABP
/// Status bar message backup
private String backupStatusString = null;
/// Error constants
private final String ERRORS[] = {
"ERROR: drawBytes cannot handle characters beyond 0x00FF. Select different range or draw methods.",
"ERROR: Cannot fit text with the current font size. Resize the window or use smaller font size.",
"ERROR: Cannot print with the current font size. Use smaller font size.",
};
private final int DRAW_BYTES_ERROR = 0;
private final int CANT_FIT_DRAW = 1;
private final int CANT_FIT_PRINT = 2;
/// Other variables
private final Cursor blankCursor;
public FontCanvas() {
this.addMouseListener( this );
this.addMouseMotionListener( this );
this.setForeground( Color.black );
this.setBackground( Color.white );
/// Creates an invisble pointer by giving it bogus image
/// Possibly find a workaround for this...
Toolkit tk = Toolkit.getDefaultToolkit();
byte bogus[] = { (byte) 0 };
blankCursor =
tk.createCustomCursor( tk.createImage( bogus ), new Point(0, 0), "" );
zoomWindow = new JWindow( parent ) {
public void paint( Graphics g ) {
g.drawImage( zoomImage, 0, 0, zoomWindow );
}
};
zoomWindow.setCursor( blankCursor );
zoomWindow.pack();
}
public boolean firstTime() { return firstTime; }
public void refresh() {
firstTime = false;
updateBackBuffer = true;
repaint();
}
/// Sets the font, hints, according to the set parameters
private void setParams( Graphics2D g2 ) {
g2.setFont( testFont );
g2.setRenderingHint(KEY_TEXT_ANTIALIASING, antiAliasType);
g2.setRenderingHint(KEY_FRACTIONALMETRICS, fractionalMetricsType);
g2.setRenderingHint(KEY_TEXT_LCD_CONTRAST, lcdContrast);
/* I am preserving a somewhat dubious behaviour of this program.
* Outline text would be drawn anti-aliased by setting the
* graphics anti-aliasing hint if the text anti-aliasing hint
* was set. The dubious element here is that people simply
* using this program may think this is built-in behaviour
* but its not - at least not when the app explicitly draws
* outline text.
* This becomes more dubious in cases such as "GASP" where the
* size at which text is AA'ed is not something you can easily
* calculate, so mimicing that behaviour isn't going to be easy.
* So I precisely preserve the behaviour : this is done only
* if the AA value is "ON". Its not applied in the other cases.
*/
if (antiAliasType == VALUE_TEXT_ANTIALIAS_ON &&
(drawMethod == TL_OUTLINE || drawMethod == GV_OUTLINE)) {
g2.setRenderingHint(KEY_ANTIALIASING, VALUE_ANTIALIAS_ON);
} else {
g2.setRenderingHint(KEY_ANTIALIASING, VALUE_ANTIALIAS_OFF);
}
}
/// Draws the grid (Used for unicode/glyph range drawing)
private void drawGrid( Graphics2D g2 ) {
int totalGridWidth = numCharAcross * gridWidth;
int totalGridHeight = numCharDown * gridHeight;
g2.setColor( Color.black );
for ( int i = 0; i < numCharDown + 1; i++ )
g2.drawLine( canvasInset_X, i * gridHeight + canvasInset_Y,
canvasInset_X + totalGridWidth, i * gridHeight + canvasInset_Y );
for ( int i = 0; i < numCharAcross + 1; i++ )
g2.drawLine( i * gridWidth + canvasInset_X, canvasInset_Y,
i * gridWidth + canvasInset_X, canvasInset_Y + totalGridHeight );
}
/// Draws one character at time onto the canvas according to
/// the method requested (Used for RANGE_TEXT and ALL_GLYPHS)
public void modeSpecificDrawChar( Graphics2D g2, int charCode,
int baseX, int baseY ) {
GlyphVector gv;
int oneGlyph[] = { charCode };
char charArray[] = Character.toChars( charCode );
FontRenderContext frc = g2.getFontRenderContext();
AffineTransform oldTX = g2.getTransform();
/// Create GlyphVector to measure the exact visual advance
/// Using that number, adjust the position of the character drawn
if ( textToUse == ALL_GLYPHS )
gv = testFont.createGlyphVector( frc, oneGlyph );
else
gv = testFont.createGlyphVector( frc, charArray );
Rectangle2D r2d2 = gv.getPixelBounds(frc, 0, 0);
int shiftedX = baseX;
// getPixelBounds returns a result in device space.
// we need to convert back to user space to be able to
// calculate the shift as baseX is in user space.
try {
double pt[] = new double[4];
pt[0] = r2d2.getX();
pt[1] = r2d2.getY();
pt[2] = r2d2.getX()+r2d2.getWidth();
pt[3] = r2d2.getY()+r2d2.getHeight();
oldTX.inverseTransform(pt,0,pt,0,2);
shiftedX = baseX - (int) ( pt[2] / 2 + pt[0] );
} catch (NoninvertibleTransformException e) {
}
/// ABP - keep track of old tform, restore it later
g2.translate( shiftedX, baseY );
g2.transform( getAffineTransform( g2Transform ) );
if ( textToUse == ALL_GLYPHS )
g2.drawGlyphVector( gv, 0f, 0f );
else {
if ( testFont.canDisplay( charCode ))
g2.setColor( Color.black );
else {
g2.setColor( Color.lightGray );
}
switch ( drawMethod ) {
case DRAW_STRING:
g2.drawString( new String( charArray ), 0, 0 );
break;
case DRAW_CHARS:
g2.drawChars( charArray, 0, 1, 0, 0 );
break;
case DRAW_BYTES:
if ( charCode > 0xff )
throw new CannotDrawException( DRAW_BYTES_ERROR );
byte oneByte[] = { (byte) charCode };
g2.drawBytes( oneByte, 0, 1, 0, 0 );
break;
case DRAW_GLYPHV:
g2.drawGlyphVector( gv, 0f, 0f );
break;
case TL_DRAW:
TextLayout tl = new TextLayout( new String( charArray ), testFont, frc );
tl.draw( g2, 0f, 0f );
break;
case GV_OUTLINE:
r2d2 = gv.getVisualBounds();
shiftedX = baseX - (int) ( r2d2.getWidth() / 2 + r2d2.getX() );
g2.draw( gv.getOutline( 0f, 0f ));
break;
case TL_OUTLINE:
r2d2 = gv.getVisualBounds();
shiftedX = baseX - (int) ( r2d2.getWidth() / 2 + r2d2.getX() );
TextLayout tlo =
new TextLayout( new String( charArray ), testFont,
g2.getFontRenderContext() );
g2.draw( tlo.getOutline( null ));
}
}
/// ABP - restore old tform
g2.setTransform ( oldTX );
}
/// Draws one line of text at given position
private void modeSpecificDrawLine( Graphics2D g2, String line,
int baseX, int baseY ) {
/// ABP - keep track of old tform, restore it later
AffineTransform oldTx = null;
oldTx = g2.getTransform();
g2.translate( baseX, baseY );
g2.transform( getAffineTransform( g2Transform ) );
switch ( drawMethod ) {
case DRAW_STRING:
g2.drawString( line, 0, 0 );
break;
case DRAW_CHARS:
g2.drawChars( line.toCharArray(), 0, line.length(), 0, 0 );
break;
case DRAW_BYTES:
try {
byte lineBytes[] = line.getBytes( "ISO-8859-1" );
g2.drawBytes( lineBytes, 0, lineBytes.length, 0, 0 );
}
catch ( Exception e ) {
e.printStackTrace();
}
break;
case DRAW_GLYPHV:
GlyphVector gv =
testFont.createGlyphVector( g2.getFontRenderContext(), line );
g2.drawGlyphVector( gv, (float) 0, (float) 0 );
break;
case TL_DRAW:
TextLayout tl = new TextLayout( line, testFont,
g2.getFontRenderContext() );
tl.draw( g2, (float) 0, (float) 0 );
break;
case GV_OUTLINE:
GlyphVector gvo =
testFont.createGlyphVector( g2.getFontRenderContext(), line );
g2.draw( gvo.getOutline( (float) 0, (float) 0 ));
break;
case TL_OUTLINE:
TextLayout tlo =
new TextLayout( line, testFont,
g2.getFontRenderContext() );
AffineTransform at = new AffineTransform();
g2.draw( tlo.getOutline( at ));
}
/// ABP - restore old tform
g2.setTransform ( oldTx );
}
/// Draws one line of text at given position
private void tlDrawLine( Graphics2D g2, TextLayout tl,
float baseX, float baseY ) {
/// ABP - keep track of old tform, restore it later
AffineTransform oldTx = null;
oldTx = g2.getTransform();
g2.translate( baseX, baseY );
g2.transform( getAffineTransform( g2Transform ) );
tl.draw( g2, (float) 0, (float) 0 );
/// ABP - restore old tform
g2.setTransform ( oldTx );
}
/// If textToUse is set to range drawing, then convert
/// int to hex string and prepends 0s to make it length 4
/// Otherwise line number was fed; simply return number + 1 converted to String
/// (This is because first line is 1, not 0)
private String modeSpecificNumStr( int i ) {
if ( textToUse == USER_TEXT || textToUse == FILE_TEXT )
return String.valueOf( i + 1 );
StringBuffer s = new StringBuffer( Integer.toHexString( i ));
while ( s.length() < 4 )
s.insert( 0, "0" );
return s.toString().toUpperCase();
}
/// Resets the scrollbar to display correct range of text currently on screen
/// (This scrollbar is not part of a "ScrollPane". It merely simulates its effect by
/// indicating the necessary area to be drawn within the panel.
/// By doing this, it prevents creating gigantic panel when large text range,
/// i.e. CJK Ideographs, is requested)
private void resetScrollbar( int oldValue ) {
int totalNumRows = 1, numCharToDisplay;
if ( textToUse == RANGE_TEXT || textToUse == ALL_GLYPHS ) {
if ( textToUse == RANGE_TEXT )
numCharToDisplay = drawRange[1] - drawRange[0];
else /// textToUse == ALL_GLYPHS
numCharToDisplay = testFont.getNumGlyphs();
totalNumRows = numCharToDisplay / numCharAcross;
if ( numCharToDisplay % numCharAcross != 0 )
totalNumRows++;
if ( oldValue / numCharAcross > totalNumRows )
oldValue = 0;
verticalBar.setValues( oldValue / numCharAcross,
numCharDown, 0, totalNumRows );
}
else {
if ( textToUse == USER_TEXT )
totalNumRows = userText.length;
else /// textToUse == FILE_TEXT;
totalNumRows = lineBreakTLs.size();
verticalBar.setValues( oldValue, numCharDown, 0, totalNumRows );
}
if ( totalNumRows <= numCharDown && drawStart == 0) {
verticalBar.setEnabled( false );
}
else {
verticalBar.setEnabled( true );
}
}
/// Calculates the font's metrics that will be used for draw
private void calcFontMetrics( Graphics2D g2d, int w, int h ) {
FontMetrics fm;
Graphics2D g2 = (Graphics2D)g2d.create();
/// ABP
if ( g2Transform != NONE && textToUse != FILE_TEXT ) {
g2.setFont( g2.getFont().deriveFont( getAffineTransform( g2Transform )) );
fm = g2.getFontMetrics();
}
else {
fm = g2.getFontMetrics();
}
maxAscent = fm.getMaxAscent();
maxDescent = fm.getMaxDescent();
if (maxAscent == 0) maxAscent = 10;
if (maxDescent == 0) maxDescent = 5;
if ( textToUse == RANGE_TEXT || textToUse == ALL_GLYPHS ) {
/// Give slight extra room for each character
maxAscent += 3;
maxDescent += 3;
gridWidth = fm.getMaxAdvance() + 6;
gridHeight = maxAscent + maxDescent;
if ( force16Cols )
numCharAcross = 16;
else
numCharAcross = ( w - 10 ) / gridWidth;
numCharDown = ( h - 10 ) / gridHeight;
canvasInset_X = ( w - numCharAcross * gridWidth ) / 2;
canvasInset_Y = ( h - numCharDown * gridHeight ) / 2;
if ( numCharDown == 0 || numCharAcross == 0 )
throw new CannotDrawException( isPrinting ? CANT_FIT_PRINT : CANT_FIT_DRAW );
if ( !isPrinting )
resetScrollbar( verticalBar.getValue() * numCharAcross );
}
else {
maxDescent += fm.getLeading();
canvasInset_X = 5;
canvasInset_Y = 5;
/// gridWidth and numCharAcross will not be used in this mode...
gridHeight = maxAscent + maxDescent;
numCharDown = ( h - canvasInset_Y * 2 ) / gridHeight;
if ( numCharDown == 0 )
throw new CannotDrawException( isPrinting ? CANT_FIT_PRINT : CANT_FIT_DRAW );
/// If this is text loaded from file, prepares the LineBreak'ed
/// text layout at this point
if ( textToUse == FILE_TEXT ) {
if ( !isPrinting )
f2dt.fireChangeStatus( "LineBreaking Text... Please Wait", false );
lineBreakTLs = new Vector();
for ( int i = 0; i < fileText.length; i++ ) {
AttributedString as =
new AttributedString( fileText[i], g2.getFont().getAttributes() );
LineBreakMeasurer lbm =
new LineBreakMeasurer( as.getIterator(), g2.getFontRenderContext() );
while ( lbm.getPosition() < fileText[i].length() )
lineBreakTLs.add( lbm.nextLayout( (float) w ));
}
}
if ( !isPrinting )
resetScrollbar( verticalBar.getValue() );
}
}
/// Calculates the amount of text that will be displayed on screen
private void calcTextRange() {
String displaying = null;
if ( textToUse == RANGE_TEXT || textToUse == ALL_GLYPHS ) {
if ( isPrinting )
if ( printMode == ONE_PAGE )
drawStart = currentlyShownChar;
else /// printMode == CUR_RANGE
drawStart = numCharAcross * numCharDown * printPageNumber;
else
drawStart = verticalBar.getValue() * numCharAcross;
if ( textToUse == RANGE_TEXT ) {
drawStart += drawRange[0];
drawLimit = drawRange[1];
}
else
drawLimit = testFont.getNumGlyphs();
drawEnd = drawStart + numCharAcross * numCharDown - 1;
if ( drawEnd >= drawLimit )
drawEnd = drawLimit;
}
else {
if ( isPrinting )
if ( printMode == ONE_PAGE )
drawStart = currentlyShownChar;
else /// printMode == ALL_TEXT
drawStart = numCharDown * printPageNumber;
else {
drawStart = verticalBar.getValue();
}
drawEnd = drawStart + numCharDown - 1;
if ( textToUse == USER_TEXT )
drawLimit = userText.length - 1;
else
drawLimit = lineBreakTLs.size() - 1;
if ( drawEnd >= drawLimit )
drawEnd = drawLimit;
}
// ABP
if ( drawStart > drawEnd ) {
drawStart = 0;
verticalBar.setValue(drawStart);
}
/// Change the status bar if not printing...
if ( !isPrinting ) {
backupStatusString = ( "Displaying" + MS_OPENING[textToUse] +
modeSpecificNumStr( drawStart ) + " to " +
modeSpecificNumStr( drawEnd ) +
MS_CLOSING[textToUse] );
f2dt.fireChangeStatus( backupStatusString, false );
}
}
/// Draws text according to the parameters set by Font2DTest GUI
private void drawText( Graphics g, int w, int h ) {
Graphics2D g2;
/// Create back buffer when not printing, and its Graphics2D
/// Then set drawing parameters for that Graphics2D object
if ( isPrinting )
g2 = (Graphics2D) g;
else {
backBuffer = (BufferedImage) this.createImage( w, h );
g2 = backBuffer.createGraphics();
g2.setColor(Color.white);
g2.fillRect(0, 0, w, h);
g2.setColor(Color.black);
}
/// sets font, RenderingHints.
setParams( g2 );
/// If flag is set, recalculate fontMetrics and reset the scrollbar
if ( updateFontMetrics || isPrinting ) {
/// NOTE: re-calculates in case G2 transform
/// is something other than NONE
calcFontMetrics( g2, w, h );
updateFontMetrics = false;
}
/// Calculate the amount of text that can be drawn...
calcTextRange();
/// Draw according to the set "Text to Use" mode
if ( textToUse == RANGE_TEXT || textToUse == ALL_GLYPHS ) {
int charToDraw = drawStart;
if ( showGrid )
drawGrid( g2 );
if ( !isPrinting )
g.drawImage( backBuffer, 0, 0, this );
for ( int i = 0; i < numCharDown && charToDraw <= drawEnd; i++ ) {
for ( int j = 0; j < numCharAcross && charToDraw <= drawEnd; j++, charToDraw++ ) {
int gridLocX = j * gridWidth + canvasInset_X;
int gridLocY = i * gridHeight + canvasInset_Y;
modeSpecificDrawChar( g2, charToDraw,
gridLocX + gridWidth / 2,
gridLocY + maxAscent );
//if ( !isPrinting ) {
// g.setClip( gridLocX, gridLocY, gridWidth + 1, gridHeight + 1 );
// g.drawImage( backBuffer, 0, 0, this );
//}
}
}
}
else if ( textToUse == USER_TEXT ) {
g2.drawRect( 0, 0, w - 1, h - 1 );
if ( !isPrinting )
g.drawImage( backBuffer, 0, 0, this );
for ( int i = drawStart; i <= drawEnd; i++ ) {
int lineStartX = canvasInset_Y;
int lineStartY = ( i - drawStart ) * gridHeight + maxAscent;
modeSpecificDrawLine( g2, userText[i], lineStartX, lineStartY );
}
}
else {
float xPos, yPos = (float) canvasInset_Y;
g2.drawRect( 0, 0, w - 1, h - 1 );
if ( !isPrinting )
g.drawImage( backBuffer, 0, 0, this );
for ( int i = drawStart; i <= drawEnd; i++ ) {
TextLayout oneLine = (TextLayout) lineBreakTLs.elementAt( i );
xPos =
oneLine.isLeftToRight() ?
canvasInset_X : ( (float) w - oneLine.getAdvance() - canvasInset_X );
float fmData[] = {0, oneLine.getAscent(), 0, oneLine.getDescent(), 0, oneLine.getLeading()};
if (g2Transform != NONE) {
AffineTransform at = getAffineTransform(g2Transform);
at.transform( fmData, 0, fmData, 0, 3);
}
//yPos += oneLine.getAscent();
yPos += fmData[1]; // ascent
//oneLine.draw( g2, xPos, yPos );
tlDrawLine( g2, oneLine, xPos, yPos );
//yPos += oneLine.getDescent() + oneLine.getLeading();
yPos += fmData[3] + fmData[5]; // descent + leading
}
}
if ( !isPrinting )
g.drawImage( backBuffer, 0, 0, this );
g2.dispose();
}
/// Component paintComponent function...
/// Draws/Refreshes canvas according to flag(s) set by other functions
public void paintComponent( Graphics g ) {
if ( updateBackBuffer ) {
Dimension d = this.getSize();
isPrinting = false;
try {
drawText( g, d.width, d.height );
}
catch ( CannotDrawException e ) {
f2dt.fireChangeStatus( ERRORS[ e.id ], true );
super.paintComponent(g);
return;
}
}
else {
/// Screen refresh
g.drawImage( backBuffer, 0, 0, this );
}
showingError = false;
updateBackBuffer = false;
}
/// Printable interface function
/// Component print function...
public int print( Graphics g, PageFormat pf, int pageIndex ) {
if ( pageIndex == 0 ) {
/// Reset the last page index to max...
lastPage = Integer.MAX_VALUE;
currentlyShownChar = verticalBar.getValue() * numCharAcross;
}
if ( printMode == ONE_PAGE ) {
if ( pageIndex > 0 )
return NO_SUCH_PAGE;
}
else {
if ( pageIndex > lastPage )
return NO_SUCH_PAGE;
}
int pageWidth = (int) pf.getImageableWidth();
int pageHeight = (int) pf.getImageableHeight();
/// Back up metrics and other drawing info before printing modifies it
int backupDrawStart = drawStart, backupDrawEnd = drawEnd;
int backupNumCharAcross = numCharAcross, backupNumCharDown = numCharDown;
Vector backupLineBreakTLs = null;
if ( textToUse == FILE_TEXT )
backupLineBreakTLs = (Vector) lineBreakTLs.clone();
printPageNumber = pageIndex;
isPrinting = true;
/// Push the actual draw area 60 down to allow info to be printed
g.translate( (int) pf.getImageableX(), (int) pf.getImageableY() + 60 );
try {
drawText( g, pageWidth, pageHeight - 60 );
}
catch ( CannotDrawException e ) {
f2dt.fireChangeStatus( ERRORS[ e.id ], true );
return NO_SUCH_PAGE;
}
/// Draw information about what is being printed
String hints = ( " with antialias " + antiAliasType + "and" +
" fractional metrics " + fractionalMetricsType +
" and lcd contrast = " + lcdContrast);
String infoLine1 = ( "Printing" + MS_OPENING[textToUse] +
modeSpecificNumStr( drawStart ) + " to " +
modeSpecificNumStr( drawEnd ) + MS_CLOSING[textToUse] );
String infoLine2 = ( "With " + fontName + " " + STYLES[fontStyle] + " at " +
fontSize + " point size " + TRANSFORMS[fontTransform] );
String infoLine3 = "Using " + METHODS[drawMethod] + hints;
String infoLine4 = "Page: " + ( pageIndex + 1 );
g.setFont( new Font( "dialog", Font.PLAIN, 12 ));
g.setColor( Color.black );
g.translate( 0, -60 );
g.drawString( infoLine1, 15, 10 );
g.drawString( infoLine2, 15, 22 );
g.drawString( infoLine3, 15, 34 );
g.drawString( infoLine4, 15, 46 );
if ( drawEnd == drawLimit )
/// This indicates that the draw will be completed with this page
lastPage = pageIndex;
/// Restore the changed values back...
/// This is important for JScrollBar settings and LineBreak'ed TLs
drawStart = backupDrawStart;
drawEnd = backupDrawEnd;
numCharAcross = backupNumCharAcross;
numCharDown = backupNumCharDown;
if ( textToUse == FILE_TEXT )
lineBreakTLs = backupLineBreakTLs;
return PAGE_EXISTS;
}
/// Ouputs the current canvas into a given PNG file
public void writePNG( String fileName ) {
try {
ImageIO.write(backBuffer, "png", new java.io.File(fileName));
}
catch ( Exception e ) {
f2dt.fireChangeStatus( "ERROR: Failed to Save PNG image; See stack trace", true );
e.printStackTrace();
}
}
/// Figures out whether a character at the pointer location is valid
/// And if so, updates mouse location informations, as well as
/// the information on the status bar
private boolean checkMouseLoc( MouseEvent e ) {
if ( gridWidth != 0 && gridHeight != 0 )
if ( textToUse == RANGE_TEXT || textToUse == ALL_GLYPHS ) {
int charLocX = ( e.getX() - canvasInset_X ) / gridWidth;
int charLocY = ( e.getY() - canvasInset_Y ) / gridHeight;
/// Check to make sure the mouse click location is within drawn area
if ( charLocX >= 0 && charLocY >= 0 &&
charLocX < numCharAcross && charLocY < numCharDown ) {
int mouseOverChar =
charLocX + ( verticalBar.getValue() + charLocY ) * numCharAcross;
if ( textToUse == RANGE_TEXT )
mouseOverChar += drawRange[0];
if ( mouseOverChar > drawEnd )
return false;
mouseOverCharX = charLocX;
mouseOverCharY = charLocY;
currMouseOverChar = mouseOverChar;
/// Update status bar
f2dt.fireChangeStatus( "Pointing to" + MS_OPENING[textToUse] +
modeSpecificNumStr( mouseOverChar ), false );
return true;
}
}
return false;
}
/// Shows (updates) the character zoom window
public void showZoomed() {
GlyphVector gv;
Font backup = testFont;
Point canvasLoc = this.getLocationOnScreen();
/// Calculate the zoom area's location and size...
int dialogOffsetX = (int) ( gridWidth * ( ZOOM - 1 ) / 2 );
int dialogOffsetY = (int) ( gridHeight * ( ZOOM - 1 ) / 2 );
int zoomAreaX =
mouseOverCharX * gridWidth + canvasInset_X - dialogOffsetX;
int zoomAreaY =
mouseOverCharY * gridHeight + canvasInset_Y - dialogOffsetY;
int zoomAreaWidth = (int) ( gridWidth * ZOOM );
int zoomAreaHeight = (int) ( gridHeight * ZOOM );
/// Position and set size of zoom window as needed
zoomWindow.setLocation( canvasLoc.x + zoomAreaX, canvasLoc.y + zoomAreaY );
if ( !nowZooming ) {
if ( zoomWindow.getWarningString() != null )
/// If this is not opened as a "secure" window,
/// it has a banner below the zoom dialog which makes it look really BAD
/// So enlarge it by a bit
zoomWindow.setSize( zoomAreaWidth + 1, zoomAreaHeight + 20 );
else
zoomWindow.setSize( zoomAreaWidth + 1, zoomAreaHeight + 1 );
}
/// Prepare zoomed image
zoomImage =
(BufferedImage) zoomWindow.createImage( zoomAreaWidth + 1,
zoomAreaHeight + 1 );
Graphics2D g2 = (Graphics2D) zoomImage.getGraphics();
testFont = testFont.deriveFont( fontSize * ZOOM );
setParams( g2 );
g2.setColor( Color.white );
g2.fillRect( 0, 0, zoomAreaWidth, zoomAreaHeight );
g2.setColor( Color.black );
g2.drawRect( 0, 0, zoomAreaWidth, zoomAreaHeight );
modeSpecificDrawChar( g2, currMouseOverChar,
zoomAreaWidth / 2, (int) ( maxAscent * ZOOM ));
g2.dispose();
if ( !nowZooming )
zoomWindow.show();
/// This is sort of redundant... since there is a paint function
/// inside zoomWindow definition that does the drawImage.
/// (I should be able to call just repaint() here)
/// However, for some reason, that paint function fails to respond
/// from second time and on; So I have to force the paint here...
zoomWindow.getGraphics().drawImage( zoomImage, 0, 0, this );
nowZooming = true;
prevZoomChar = currMouseOverChar;
testFont = backup;
// Windows does not repaint correctly, after
// a zoom. Thus, we need to force the canvas
// to repaint, but only once. After the first repaint,
// everything stabilizes. [ABP]
if ( firstTime() ) {
refresh();
}
}
/// Listener Functions
/// MouseListener interface function
/// Zooms a character when mouse is pressed above it
public void mousePressed( MouseEvent e ) {
if ( !showingError) {
if ( checkMouseLoc( e )) {
showZoomed();
this.setCursor( blankCursor );
}
}
}
/// MouseListener interface function
/// Redraws the area that was drawn over by zoomed character
public void mouseReleased( MouseEvent e ) {
if ( textToUse == RANGE_TEXT || textToUse == ALL_GLYPHS ) {
if ( nowZooming )
zoomWindow.hide();
nowZooming = false;
}
this.setCursor( Cursor.getDefaultCursor() );
}
/// MouseListener interface function
/// Resets the status bar to display range instead of a specific character
public void mouseExited( MouseEvent e ) {
if ( !showingError && !nowZooming )
f2dt.fireChangeStatus( backupStatusString, false );
}
/// MouseMotionListener interface function
/// Adjusts the status bar message when mouse moves over a character
public void mouseMoved( MouseEvent e ) {
if ( !showingError ) {
if ( !checkMouseLoc( e ))
f2dt.fireChangeStatus( backupStatusString, false );
}
}
/// MouseMotionListener interface function
/// Scrolls the zoomed character when mouse is dragged
public void mouseDragged( MouseEvent e ) {
if ( !showingError )
if ( nowZooming ) {
if ( checkMouseLoc( e ) && currMouseOverChar != prevZoomChar )
showZoomed();
}
}
/// Empty function to comply with interface requirement
public void mouseClicked( MouseEvent e ) {}
public void mouseEntered( MouseEvent e ) {}
}
private final class CannotDrawException extends RuntimeException {
/// Error ID
public final int id;
public CannotDrawException( int i ) {
id = i;
}
}
enum FMValues {
FMDEFAULT ("DEFAULT", VALUE_FRACTIONALMETRICS_DEFAULT),
FMOFF ("OFF", VALUE_FRACTIONALMETRICS_OFF),
FMON ("ON", VALUE_FRACTIONALMETRICS_ON);
private String name;
private Object hint;
private static FMValues[] valArray;
FMValues(String s, Object o) {
name = s;
hint = o;
}
public String toString() {
return name;
}
public Object getHint() {
return hint;
}
public static Object getValue(int ordinal) {
if (valArray == null) {
valArray = (FMValues[])EnumSet.allOf(FMValues.class).toArray(new FMValues[0]);
}
for (int i=0;i<valArray.length;i++) {
if (valArray[i].ordinal() == ordinal) {
return valArray[i];
}
}
return valArray[0];
}
private static FMValues[] getArray() {
if (valArray == null) {
valArray = (FMValues[])EnumSet.allOf(FMValues.class).toArray(new FMValues[0]);
}
return valArray;
}
public static int getHintVal(Object hint) {
getArray();
for (int i=0;i<valArray.length;i++) {
if (valArray[i].getHint() == hint) {
return i;
}
}
return 0;
}
}
enum AAValues {
AADEFAULT ("DEFAULT", VALUE_TEXT_ANTIALIAS_DEFAULT),
AAOFF ("OFF", VALUE_TEXT_ANTIALIAS_OFF),
AAON ("ON", VALUE_TEXT_ANTIALIAS_ON),
AAGASP ("GASP", VALUE_TEXT_ANTIALIAS_GASP),
AALCDHRGB ("LCD_HRGB", VALUE_TEXT_ANTIALIAS_LCD_HRGB),
AALCDHBGR ("LCD_HBGR", VALUE_TEXT_ANTIALIAS_LCD_HBGR),
AALCDVRGB ("LCD_VRGB", VALUE_TEXT_ANTIALIAS_LCD_VRGB),
AALCDVBGR ("LCD_VBGR", VALUE_TEXT_ANTIALIAS_LCD_VBGR);
private String name;
private Object hint;
private static AAValues[] valArray;
AAValues(String s, Object o) {
name = s;
hint = o;
}
public String toString() {
return name;
}
public Object getHint() {
return hint;
}
public static boolean isLCDMode(Object o) {
return (o instanceof AAValues &&
((AAValues)o).ordinal() >= AALCDHRGB.ordinal());
}
public static Object getValue(int ordinal) {
if (valArray == null) {
valArray = (AAValues[])EnumSet.allOf(AAValues.class).toArray(new AAValues[0]);
}
for (int i=0;i<valArray.length;i++) {
if (valArray[i].ordinal() == ordinal) {
return valArray[i];
}
}
return valArray[0];
}
private static AAValues[] getArray() {
if (valArray == null) {
Object [] oa = EnumSet.allOf(AAValues.class).toArray(new AAValues[0]);
valArray = (AAValues[])(EnumSet.allOf(AAValues.class).toArray(new AAValues[0]));
}
return valArray;
}
public static int getHintVal(Object hint) {
getArray();
for (int i=0;i<valArray.length;i++) {
if (valArray[i].getHint() == hint) {
return i;
}
}
return 0;
}
}
private static Integer defaultContrast;
static Integer getDefaultLCDContrast() {
if (defaultContrast == null) {
GraphicsConfiguration gc =
GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration();
Graphics2D g2d =
(Graphics2D)(gc.createCompatibleImage(1,1).getGraphics());
defaultContrast = (Integer)
g2d.getRenderingHint(RenderingHints.KEY_TEXT_LCD_CONTRAST);
}
return defaultContrast;
}
}
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