propertysheetpanel.java

wekaUT是 university texas austin 开发的基于weka的半指导学习(semi supervised learning)的分类器

	Class pec = m_Properties[i].getPropertyEditorClass();
	if (pec != null) {
	  try {
	    editor = (PropertyEditor)pec.newInstance();
	  } catch (Exception ex) {
	    // Drop through.
	  }
	}
	if (editor == null) {
	  editor = PropertyEditorManager.findEditor(type);
	}
	m_Editors[i] = editor;

	// If we can't edit this component, skip it.
	if (editor == null) {
	  // If it's a user-defined property we give a warning.
	  String getterClass = m_Properties[i].getReadMethod()
	    .getDeclaringClass().getName();
	  /*
	  if (getterClass.indexOf("java.") != 0) {
	    System.err.println("Warning: Can't find public property editor"
			       + " for property \"" + name + "\" (class \""
			       + type.getName() + "\").  Skipping.");
	  }
	  */
	  continue;
	}
	if (editor instanceof GenericObjectEditor) {
	  ((GenericObjectEditor) editor).setClassType(type);
	}

	// Don't try to set null values:
	if (value == null) {
	  // If it's a user-defined property we give a warning.
	  String getterClass = m_Properties[i].getReadMethod()
	    .getDeclaringClass().getName();
	  /*
	  if (getterClass.indexOf("java.") != 0) {
	    System.err.println("Warning: Property \"" + name 
			       + "\" has null initial value.  Skipping.");
	  }
	  */
	  continue;
	}

	editor.setValue(value);

	// now look for a TipText method for this property
        String tipName = name + "TipText";
	for (int j = 0; j < m_Methods.length; j++) {
	  String mname = m_Methods[j].getDisplayName();
	  Method meth = m_Methods[j].getMethod();
	  if (mname.equals(tipName)) {
	    if (meth.getReturnType().equals(String.class)) {
	      try {
		String tempTip = (String)(meth.invoke(m_Target, args));
		int ci = tempTip.indexOf('.');
		if (ci < 0) {
		  m_TipTexts[i] = tempTip;
		} else {
		  m_TipTexts[i] = tempTip.substring(0, ci);
		}
                if (m_HelpText != null) {
                  if (firstTip) {
                    m_HelpText.append("OPTIONS\n");
                    firstTip = false;
                  }
                  m_HelpText.append(name).append(" -- ");
                  m_HelpText.append(tempTip).append("\n\n");
                  //jt.setText(m_HelpText.toString());
                }
	      } catch (Exception ex) {

	      }
	      break;
	    }
	  }
	}	  

	
	// Now figure out how to display it...
	if (editor.isPaintable() && editor.supportsCustomEditor()) {
	  view = new PropertyPanel(editor);
	} else if (editor.getTags() != null) {
	  view = new PropertyValueSelector(editor);
	} else if (editor.getAsText() != null) {
	  //String init = editor.getAsText();
	  view = new PropertyText(editor);
	} else {
	  System.err.println("Warning: Property \"" + name 
			     + "\" has non-displayabale editor.  Skipping.");
	  continue;
	}

	editor.addPropertyChangeListener(this);

      } catch (InvocationTargetException ex) {
	System.err.println("Skipping property " + name
			   + " ; exception on target: "
			   + ex.getTargetException());
	ex.getTargetException().printStackTrace();
	continue;
      } catch (Exception ex) {
	System.err.println("Skipping property " + name
			   + " ; exception: " + ex);
	ex.printStackTrace();
	continue;
      }

      m_Labels[i] = new JLabel(name, SwingConstants.RIGHT);
      m_Labels[i].setBorder(BorderFactory.createEmptyBorder(10, 10, 0, 5));
      m_Views[i] = view;
      GridBagConstraints gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.EAST;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = i+componentOffset;     gbConstraints.gridx = 0;
      gbLayout.setConstraints(m_Labels[i], gbConstraints);
      add(m_Labels[i]);
      JPanel newPanel = new JPanel();
      if (m_TipTexts[i] != null) {
	m_Views[i].setToolTipText(m_TipTexts[i]);
      }
      newPanel.setBorder(BorderFactory.createEmptyBorder(10, 5, 0, 10));
      newPanel.setLayout(new BorderLayout());
      newPanel.add(m_Views[i], BorderLayout.CENTER);
      gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.WEST;
      gbConstraints.fill = GridBagConstraints.BOTH;
      gbConstraints.gridy = i+componentOffset;     gbConstraints.gridx = 1;
      gbConstraints.weightx = 100;
      gbLayout.setConstraints(newPanel, gbConstraints);
      add(newPanel);
      m_NumEditable ++;
    }
    if (m_NumEditable == 0) {
      JLabel empty = new JLabel("No editable properties", 
                                SwingConstants.CENTER);
      Dimension d = empty.getPreferredSize();
      empty.setPreferredSize(new Dimension(d.width * 2, d.height * 2));
      empty.setBorder(BorderFactory.createEmptyBorder(10, 5, 0, 10));
      GridBagConstraints gbConstraints = new GridBagConstraints();
      gbConstraints.anchor = GridBagConstraints.CENTER;
      gbConstraints.fill = GridBagConstraints.HORIZONTAL;
      gbConstraints.gridy = componentOffset;     gbConstraints.gridx = 0;
      gbLayout.setConstraints(empty, gbConstraints);
      add(empty);
    }

    validate();
    setVisible(true);	
  }

  protected void openHelpFrame() {

    JTextArea ta = new JTextArea();
    ta.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
    ta.setLineWrap(true);
    ta.setWrapStyleWord(true);
    //ta.setBackground(getBackground());
    ta.setEditable(false);
    ta.setText(m_HelpText.toString());
    ta.setCaretPosition(0);
    final JFrame jf = new JFrame("Information");
    jf.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        jf.dispose();
        if (m_HelpFrame == jf) {
          m_HelpBut.setEnabled(true);
        }
      }
    });
    jf.getContentPane().setLayout(new BorderLayout());
    jf.getContentPane().add(new JScrollPane(ta), BorderLayout.CENTER);
    jf.pack();
    jf.setSize(400, 350);
    jf.setLocation(getTopLevelAncestor().getLocationOnScreen().x 
                   + getTopLevelAncestor().getSize().width,
                   getTopLevelAncestor().getLocationOnScreen().y);
    jf.setVisible(true);
    m_HelpFrame = jf;
  }


  /**
   * Gets the number of editable properties for the current target.
   *
   * @return the number of editable properties.
   */
  public int editableProperties() {

    return m_NumEditable;
  }
  
  /**
   * Updates the propertysheet when a value has been changed (from outside
   * the propertysheet?).
   *
   * @param evt a value of type 'PropertyChangeEvent'
   */
  synchronized void wasModified(PropertyChangeEvent evt) {

    //    System.err.println("wasModified");
    if (evt.getSource() instanceof PropertyEditor) {
      PropertyEditor editor = (PropertyEditor) evt.getSource();
      for (int i = 0 ; i < m_Editors.length; i++) {
	if (m_Editors[i] == editor) {
	  PropertyDescriptor property = m_Properties[i];
	  Object value = editor.getValue();
	  m_Values[i] = value;
	  Method setter = property.getWriteMethod();
	  try {
	    Object args[] = { value };
	    args[0] = value;
	    setter.invoke(m_Target, args);
	  } catch (InvocationTargetException ex) {
	    if (ex.getTargetException()
		instanceof PropertyVetoException) {
	      System.err.println("WARNING: Vetoed; reason is: " 
				 + ex.getTargetException().getMessage());
	    } else {
	      System.err.println("InvocationTargetException while updating " 
				 + property.getName());
	    }
	  } catch (Exception ex) {
	    System.err.println("Unexpected exception while updating " 
		  + property.getName());
	  }
	  if (m_Views[i] != null && m_Views[i] instanceof PropertyPanel) {
	    //System.err.println("Trying to repaint the property canvas");
	    m_Views[i].repaint();
	    revalidate();
	  }
	  break;
	}
      }
    }

    // Now re-read all the properties and update the editors
    // for any other properties that have changed.
    for (int i = 0; i < m_Properties.length; i++) {
      Object o;
      try {
	Method getter = m_Properties[i].getReadMethod();
	Method setter = m_Properties[i].getWriteMethod();
	
	if (getter == null || setter == null) {
	  // ignore set/get only properties
	  continue;
	}

	Object args[] = { };
	o = getter.invoke(m_Target, args);
      } catch (Exception ex) {
	o = null;
      }
      if (o == m_Values[i] || (o != null && o.equals(m_Values[i]))) {
	// The property is equal to its old value.
	continue;
      }
      m_Values[i] = o;
      // Make sure we have an editor for this property...
      if (m_Editors[i] == null) {
	continue;
      }
      // The property has changed!  Update the editor.
      m_Editors[i].removePropertyChangeListener(this);
      m_Editors[i].setValue(o);
      m_Editors[i].addPropertyChangeListener(this);
      if (m_Views[i] != null) {
	//System.err.println("Trying to repaint " + (i + 1));
	m_Views[i].repaint();
      }
    }

    // Make sure the target bean gets repainted.
    if (Beans.isInstanceOf(m_Target, Component.class)) {
      ((Component)(Beans.getInstanceOf(m_Target, Component.class))).repaint();
    }
  }
}