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package test;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
public class TestTextPane extends javax.swing.JFrame implements ActionListener, PropertyChangeListener
{
private static final long serialVersionUID = 1L;
private final HTMLEditorKit htmlKit = new HTMLEditorKit();
private HTMLDocument htmlDoc = null;
private final javax.swing.JPanel frameContentPane = new javax.swing.JPanel();
private javax.swing.JButton Finish = null;
private javax.swing.JButton HTML = null;
private javax.swing.JButton newstyle = null;
private javax.swing.JLabel labmes = null;
private javax.swing.JTextField filename = null;
private javax.swing.JLabel Message = null;
private javax.swing.JTextPane myTextPane = null;
private javax.swing.JScrollPane scrollPane = null;
private static java.net.URL url = null;
private int selStart, selEnd;
public TestTextPane() {super();initialize();}
public void actionPerformed(java.awt.event.ActionEvent e)
{
try {
if (e.getSource() == Finish) { System.exit(0);}
if (e.getSource() == HTML) { loadHTML();}
if (e.getSource() == newstyle) { changeParagraphStyle();}
} catch (Exception ex) {}
}
private void initialize()
{
setName("TestTextPane");
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
setSize(557, 451);
myTextPane = new javax.swing.JTextPane();
myTextPane.setName("myTextPane");
myTextPane.setBounds(0, 0, 11, 6);
HTML = new javax.swing.JButton();
HTML.setName("HTLM");
HTML.setText("Load ");
HTML.setBounds(66, 303, 99, 25);
newstyle = new javax.swing.JButton();
newstyle.setName("newStyle");
newstyle.setText("New Style");
newstyle.setBounds(225, 303, 99, 25);
Finish = new javax.swing.JButton();
Finish.setName("Finish");
Finish.setText("Finish");
Finish.setBounds(390, 303, 101, 25);
Message = new javax.swing.JLabel();
Message.setName("Message");
Message.setText(" ");
Message.setBounds(68, 283, 419, 14);
Message.setForeground(new java.awt.Color(255,0,0));
labmes = new javax.swing.JLabel();
labmes.setName("labmes");
labmes.setFont(new java.awt.Font("Arial", 1, 12));
labmes.setText("Load from URL");
labmes.setBounds(127, 256, 106, 14);
labmes.setForeground(java.awt.Color.black);
filename = new javax.swing.JTextField();
filename.setName("Pagename");
filename.setBounds(237, 252, 221, 20);
filename.setText("http://www.google.com/");
frameContentPane.setName("myFrame");
frameContentPane.setLayout(null);
scrollPane = new javax.swing.JScrollPane();
scrollPane.setName("scrollPane");
scrollPane.setBounds(23, 18, 513, 205);
scrollPane.setViewportView(myTextPane);
frameContentPane.add(scrollPane, scrollPane.getName());
frameContentPane.add(HTML, HTML.getName());
frameContentPane.add(newstyle, newstyle.getName());
frameContentPane.add(Finish, Finish.getName());
frameContentPane.add(Message, Message.getName());
frameContentPane.add(filename, filename.getName());
frameContentPane.add(labmes, labmes.getName());
setContentPane( frameContentPane);
HTML.addActionListener(this);
newstyle.addActionListener(this);
Finish.addActionListener(this);
java.awt.Dimension fenetre = this.getSize();
int sizex = fenetre.width, sizey = fenetre.height;
java.awt.Dimension screen = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screen.width - sizex) / 2,(screen.height - sizey) / 2, sizex, sizey);
myTextPane.setEditable(true);
myTextPane.setEditorKit(htmlKit);
myTextPane.setText("<html><body>Hello. Specify the HTML page to be loaded then click on the Load Button.</body></html>" );
myTextPane.addPropertyChangeListener(this);
this.setVisible(true);
}
private void loadHTML()throws Exception
{
Message.setText("");
try
{
htmlDoc = (HTMLDocument) myTextPane.getDocument();
String fn = filename.getText().trim();
if (fn== null || fn.equals("")){Message.setText("You need to enter the file to load. ");return; }
url = new java.net.URL(fn);
if (url==null) throw new java.io.IOException();
myTextPane.setPage(url);
myTextPane.requestFocus();
}
catch (Exception ex) {Message.setText( "Loading error.");}
}
public static void main(java.lang.String[] args) {new TestTextPane();}
public void propertyChange(PropertyChangeEvent evt)
{
String propertyName = evt.getPropertyName();
System.out.println(propertyName); // for debugging purpose
if (propertyName.equals("page")|| propertyName.equals("document"))
{
System.out.println("The HTML page is loaded ...");
myTextPane.setCaretPosition(0);
myTextPane.getCaret().setDot(0);
myTextPane.setSelectionStart(0);
myTextPane.setSelectionEnd(1);
myTextPane.getCaret().setSelectionVisible(true);
myTextPane.requestFocus();
Message.setText("File loaded successfully...");
}
}
public void changeParagraphStyle()
{
try
{
String selText = myTextPane.getSelectedText();
if (selText == null ) {Message.setText("No selected field for new style"); return ; } // aucune ligne sélectionnée
Message.setText("");
selStart = myTextPane.getSelectionStart();
selEnd = myTextPane.getSelectionEnd();
Style defaultStyle = myTextPane.getStyle(StyleContext.DEFAULT_STYLE);
Style style = myTextPane.addStyle("paragraph", defaultStyle);
StyleConstants.setBold(style, true);
StyleConstants.setFontSize(style, 14);
StyleConstants.setFontFamily(style, "Serif");
StyleConstants.setItalic(style, true);
StyleConstants.setUnderline(style, true);
StyleConstants.setForeground(style, new Color(0,0,255));
myTextPane.setParagraphAttributes( style, true);
}
catch (Exception ex )
{
Message.setText("Error when changing style");
System.out.println(ex.toString());
}
}
} |
Changer le style d'une zone d'un JTextPane
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