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| import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Insets;
import java.util.HashMap;
import java.util.Map;
import javax.swing.JTextPane;
import javax.swing.text.AbstractDocument;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
public class ColorCharTextField extends JTextPane {
private static final long serialVersionUID = 1L;
private int columns;
private int columnWidth;
/**
* @param colorMap définit les caractères qu'on peut saisir et leur couleur d'affichage associée
*/
public ColorCharTextField(Map<Character, Color> colorMap) {
this(null, 0, colorMap);
}
public ColorCharTextField(int column , Map<Character, Color> colorMap) {
this(null, column, colorMap);
}
public ColorCharTextField(String text, Color colorZero, Map<Character, Color> colorMap) {
this(text, 0, colorMap);
}
public ColorCharTextField(String text, int column, Map<Character, Color> colorMap) {
super();
Map<Character, Color> cleanColorMap = cleanColorMap(colorMap);
StyledDocument styledDoc = getStyledDocument();
if (styledDoc instanceof AbstractDocument) {
AbstractDocument doc = (AbstractDocument)styledDoc;
doc.setDocumentFilter(new ColorStyler(cleanColorMap));
}
if ( text!=null ) {
setText(text);
}
}
/**
* Supprimes tous les caractères avant le !, sauf l'espace (dont \n et \r)
* @param colorMap
* @return
*/
private Map<Character, Color> cleanColorMap(Map<Character, Color> colorMap) {
Map<Character, Color> map = new HashMap<Character, Color>();
for(Map.Entry<Character, Color> entries : colorMap.entrySet()) {
if ( entries.getKey()==' ' || entries.getKey()>='!' ) {
map.put(entries.getKey(), entries.getValue());
}
}
return map;
}
/**
* {@see JTextField#getColumns()}
*/
public int getColumns() {
return columns;
}
/**
* {@see JTextField#setColumns(int)}
*/
public void setColumns(int columns) {
int oldVal = this.columns;
if (columns < 0) {
throw new IllegalArgumentException("columns less than zero.");
}
if (columns != oldVal) {
this.columns = columns;
invalidate();
}
}
/**
* Returns the column width.
* The meaning of what a column is can be considered a fairly weak
* notion for some fonts. This method is used to define the width
* of a column. By default this is defined to be the width of the
* character <em>m</em> for the font used. This method can be
* redefined to be some alternative amount
*
* @return the column width >= 1
*/
protected int getColumnWidth() {
if (columnWidth == 0) {
FontMetrics metrics = getFontMetrics(getFont());
columnWidth = metrics.charWidth('m');
}
return columnWidth;
}
/**
* {@see JTextField#getPreferredSize()}
*/
public Dimension getPreferredSize() {
Dimension size = super.getPreferredSize();
if (columns != 0) {
Insets insets = getInsets();
size.width = columns * getColumnWidth() +
insets.left + insets.right;
}
return size;
}
/**
* {@see JTextField#setFont(Font)}
*/
public void setFont(Font f) {
super.setFont(f);
columnWidth = 0;
}
private static class ColorStyler extends DocumentFilter {
private final Map<Character,Color> colorMap;
public ColorStyler(Map<Character, Color> colorMap) {
this.colorMap=colorMap;
}
@Override
public void replace(FilterBypass fb, int offset, int length,
String text, AttributeSet attrs) throws BadLocationException {
text=filter(text); // on nettoie la chaine avant pour ne pas prendre en compte un remplacement par un caractère non accepté
if ( !"".equals(text) ) {
remove(fb, offset, length);
insertString(fb, offset, text, attrs);
}
}
private String filter(String text) {
StringBuilder sb = new StringBuilder(text.length());
for(int i=0; i<text.length(); i++) {
char c = text.charAt(i);
if ( colorMap.containsKey(c) ) {
sb.append(c);
}
}
return sb.toString();
}
@Override
public void remove(FilterBypass fb, int offset, int length)
throws BadLocationException {
super.remove(fb, offset, length);
}
@Override
public void insertString(FilterBypass fb, int offset, String string,
AttributeSet attr) throws BadLocationException {
for(int i=0; i<string.length(); i++) {
char c = string.charAt(i);
MutableAttributeSet mattr = new SimpleAttributeSet(attr);
Color color = colorMap.get(c);
if ( color!=null ) {
StyleConstants.setForeground(mattr, color);
super.insertString(fb, offset+i, String.valueOf(c), mattr);
}
}
}
}
} |
