jnumber.java

OSGI这是一个中间件,与UPNP齐名,是用于移植到嵌入式平台之上

/*
 * Copyright (c) 2003, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.desktop.cm;

import org.osgi.framework.*;
import org.osgi.service.cm.*;
import org.osgi.util.tracker.*;
import java.util.*;
import org.knopflerfish.service.desktop.*;
import org.knopflerfish.util.metatype.*;
import org.osgi.service.metatype.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

public class JNumber extends JPanel {
  Number num;
  AttributeDefinition ad;

  JTextField text;
  JSlider    slider = null;

  double max;
  double min;
  
  boolean bUseSlider = false;

  static final int RANGE = 1000;

  JNumber(AttributeDefinition _ad) {
    super(new BorderLayout());
    this.ad       = _ad;
    
    text = new JTextField();
    if(bUseSlider) {
      slider = new JSlider();
    }

    switch(ad.getType()) {
    case AttributeDefinition.INTEGER:
      min = 0;
      max = 65535;
      break;
    case AttributeDefinition.LONG:
      min = 0;
      max = 65535;
      break;
    case AttributeDefinition.SHORT:
      min = 0;
      max = 65535;
      break;
    case AttributeDefinition.DOUBLE:
      min = 0;
      max = 65535;
      break;
    case AttributeDefinition.FLOAT:
      min = 0;
      max = 65535;
      break;
    default:
      throw new IllegalArgumentException("Unsupported type=" + ad.getType());
    }

    text   = new JTextField("");
    if(bUseSlider) {
      slider = new JSlider(0, RANGE);
    }

    text.setPreferredSize(new Dimension(50, 10));
    add(text,   BorderLayout.WEST);
    if(slider != null) {
      add(slider, BorderLayout.CENTER);
    }
    text.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent ev) {
	  Number n = (Number)AD.parse(text.getText(), 0, ad.getType());
	  setValue(n);
	}
      });

    if(slider != null) {
      slider.addChangeListener(new ChangeListener() {
	  public void stateChanged(ChangeEvent e) {
	    int v = slider.getValue();
	    switch(ad.getType()) {
	    case AttributeDefinition.INTEGER:
	    case AttributeDefinition.SHORT:
	    case AttributeDefinition.LONG: 
	      {
		long val = (long)(min + (max-min) * (double)v / RANGE);
		text.setText(Long.toString(val));
	      }
	      break;
	    case AttributeDefinition.DOUBLE:
	    case AttributeDefinition.FLOAT:
	      {
		double val = min + (max - min) * (double)v / RANGE;
		text.setText(Double.toString(val));
	      }
	      break;
	    }
	  }
	});
    }
  }
  
  void syncUI() {
  }
  
  Object getValue() {
    switch(ad.getType()) {
    case AttributeDefinition.INTEGER:
      return new Integer(text.getText());
    case AttributeDefinition.LONG:
      return new Long(text.getText());
    case AttributeDefinition.SHORT:
      return new Short(text.getText());
    case AttributeDefinition.DOUBLE:
      return new Double(text.getText());
    case AttributeDefinition.FLOAT:
      return new Float(text.getText());
    default:
      throw new IllegalArgumentException("Unsupported type=" + ad.getType());
    }
  }

  /**
   * Set item values from vector or array object.
   *
   * <p>
   * If object is null, use default values from AD
   * </p>
   */
  void setValue(Object obj) {
    if(obj instanceof Number) {
      Number n = (Number)obj;
      double val = n.doubleValue();
      // double val = min + (max - min) * (double)v / RANGE;
      int v = (int)(RANGE * (val - min) / (max - min));
      if(slider != null) {
	slider.setValue(v);
      }
      text.setText(n.toString());
    } else {
      throw new IllegalArgumentException("Value is not a Number, is "  + 
					 obj.getClass().getName() + ", " + obj);
    }
  }
}