beanbinder.java

JGraph扩展应用。自定义Renderer,自定义视图View实现自定义工作流控件

/**
 * @PROJECT.FULLNAME@ @VERSION@ License.
 *
 * Copyright @YEAR@ L2FProd.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.l2fprod.common.demo;

import com.l2fprod.common.model.DefaultBeanInfoResolver;
import com.l2fprod.common.propertysheet.Property;
import com.l2fprod.common.propertysheet.PropertySheetPanel;

import java.beans.BeanInfo;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyVetoException;

import javax.swing.UIManager;

/**
 * Binds a bean object to a PropertySheet.
 * 
 * <b>Note: this class is not part of the library</b>
 */
public class BeanBinder {

  private final Object bean;
  private final PropertySheetPanel sheet;
  private final PropertyChangeListener listener;

  public BeanBinder(Object bean, PropertySheetPanel sheet) {
    this(bean, sheet, new DefaultBeanInfoResolver().getBeanInfo(bean));
  }

  public BeanBinder(Object bean, PropertySheetPanel sheet, BeanInfo beanInfo) {
    this.bean = bean;
    this.sheet = sheet;

    sheet.setProperties(beanInfo.getPropertyDescriptors());
    sheet.readFromObject(bean);

    // everytime a property change, update the button with it
    listener = new PropertyChangeListener() {
      public void propertyChange(PropertyChangeEvent evt) {
        Property prop = (Property)evt.getSource();
        try {
          prop.writeToObject(BeanBinder.this.bean);
        } catch (RuntimeException e) {
          // handle PropertyVetoException and restore previous value
          if (e.getCause() instanceof PropertyVetoException) {
            UIManager.getLookAndFeel().provideErrorFeedback(
              BeanBinder.this.sheet);
            prop.setValue(evt.getOldValue());
          }
        }
      }
    };
    sheet.addPropertySheetChangeListener(listener);
  }

  public void unbind() {
    sheet.removePropertyChangeListener(listener);
    sheet.setProperties(new Property[0]);
  }

}