ChatApp/PanouMesaje.java

   1 /*
   2  * © 2010 ROBO Design
   3  * http://www.robodesign.ro
   4  *
   5  * $Date: 2010-05-19 14:00:29 +0300 $
   6  */
   7
   8 package ChatApp;
   9
  10 import java.awt.Color;
  11 import java.awt.Rectangle;
  12 import java.io.FileReader;
  13 import javax.swing.JEditorPane;
  14 import javax.swing.JScrollPane;
  15 import javax.swing.text.Element;
  16 import javax.swing.text.html.HTMLDocument;
  17 import javax.swing.text.html.StyleSheet;
  18
  19 // clasa ce permite utilizarea facila a unui JEditorPane in taburile ce afiseaza
  20 // discutii.
  21 public class PanouMesaje extends JScrollPane {
  22   private HTMLDocument myDoc = null;
  23   private Element myElemMesaje = null;
  24   private JEditorPane myEditorPane = null;
  25   private final String myFisierStil = "stil.css";
  26
  27   // initializarea sablon a unui JEditorPane
  28   public PanouMesaje () {
  29     super();
  30
  31     myEditorPane = new JEditorPane();
  32     myEditorPane.setOpaque(true);
  33     myEditorPane.setBackground(Color.WHITE);
  34     myEditorPane.setEditable(false);
  35     myEditorPane.setContentType("text/html; charset=utf8");
  36     myEditorPane.setText("<html><head><meta charset='utf8'></head><body id='mesaje'></body></html>");
  37
  38     myDoc = (HTMLDocument) myEditorPane.getDocument();
  39     myElemMesaje = myDoc.getElement("mesaje");
  40     StyleSheet style = myDoc.getStyleSheet();
  41
  42     try {
  43       style.loadRules(new FileReader(myFisierStil), null);
  44     } catch (Exception ex) {
  45       System.err.println("Nu am reusit sa aplic stilul la afisarea de mesaje. " + ex);
  46       ex.printStackTrace();
  47     }
  48
  49     this.setViewportView(myEditorPane);
  50   }
  51
  52   public JEditorPane getMyEditorPane () {
  53     return myEditorPane;
  54   }
  55
  56   // metoda ce permite adaugarea rapida a unui mesaj
  57   public void adaugaMesaj (String htmlStr, String cssClass) {
  58     Element ultimulElem = myElemMesaje.getElement(myElemMesaje.getElementCount()-1);
  59
  60     try {
  61       myDoc.insertAfterEnd(ultimulElem, "<p class='" + cssClass + "'>" + htmlStr + "</p>\n");
  62     } catch (Exception ex) {
  63       System.err.println("Afisarea de mesaje a esuat. " + ex);
  64       ex.printStackTrace();
  65       return;
  66     }
  67
  68     myEditorPane.scrollRectToVisible(new Rectangle(0, myEditorPane.getHeight()+1000, 1, 1));
  69   }
  70 }
  71
  72 // vim:set fo=wancroql tw=80 ts=2 sw=2 sts=2 sta et ai cin ff=unix: