svgvisualresourceeditablecomboattributewidget.java

完全基于java开发的svg矢量绘图工具

/*
 * Created on 26 août 2004
 * 
 =============================================
 GNU LESSER GENERAL PUBLIC LICENSE Version 2.1
 =============================================
 GLIPS Graffiti Editor, a SVG Editor
 Copyright (C) 2003 Jordi SUC, Philippe Gil, SARL ITRIS
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 Contact : [e-mail]; [e-mail]
 
 =============================================
 */
package fr.itris.glips.svgeditor.visualresources;

import javax.swing.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.border.*;

/**
 * the class of the widgets that will be displayed in the properties dialog, and enabling to modify the properties (with an editable combo)
 * of an attribute (or a group of attributes) of a resource node.
 * 
 * @author Jordi SUC
 */
public class SVGVisualResourceEditableComboAttributeWidget extends SVGVisualResourceAttributeWidget{

	/**
	 * the constructor of the class
	 * @param resourceObjectAttribute the attribute object that will be modified
	 */
    public SVGVisualResourceEditableComboAttributeWidget(SVGVisualResourceObjectAttribute resourceObjectAttribute) {

        super(resourceObjectAttribute);
        
        buildComponent();
    }
    
    /**
     * builds the component to be displayed
     */
    protected void buildComponent(){
        
        if(resourceObjectAttribute!=null){

            //the list of the items
            final LinkedList itemList=new LinkedList();
            
            //the map of the possible values
            LinkedHashMap possibleValues=resourceObjectAttribute.getModel().getPossibleValues();

            SVGComboItem item=null, selectedItem=null;
            String nm="", val="", lbl="";
            
            //an item with an empty string
            item=new SVGComboItem("","");
            itemList.add(item);
            
            //builds the array of items for the combo
            for(Iterator it=possibleValues.keySet().iterator(); it.hasNext();){

                try{
                    nm=(String)it.next();
                    val=(String)possibleValues.get(nm);
                    
                    //gets the label
                    lbl=nm;
                    
                    if(bundle!=null){
                        
                        lbl=bundle.getString(nm);
                    }
                    
                    item=new SVGComboItem(val, lbl);
                    
                    //checks if the current possible value is equals to the current value of the attribute
                    if(val!=null && val.equals(resourceObjectAttribute.getValue())){
                        
                        selectedItem=item;
                    }
                    
                }catch (Exception ex){item=null; nm="";}
                
                //adds the item to the list
                if(item!=null){
                    
                    itemList.add(item);
                }
            }
            
			
			if(selectedItem==null && resourceObjectAttribute.getValue()!=null){
			    
				selectedItem=new SVGComboItem(resourceObjectAttribute.getValue(), resourceObjectAttribute.getValue());
				itemList.addFirst(selectedItem);
			}

			Object[] items=itemList.toArray();
			
			//the combo box
			final JComboBox combo=new JComboBox(items);
			combo.setFont(theFont);
			combo.setEditable(true);
			
			//sets the selected item
			if(selectedItem!=null){
			    
			    combo.setSelectedItem(selectedItem);
			}
				
			final ActionListener comboListener=new ActionListener(){
				
			    public void actionPerformed(ActionEvent evt) {
				    
					String val="";
					
					if(combo.getSelectedItem()!=null){
					    
						try{
							val=((SVGComboItem)combo.getSelectedItem()).getValue();
						}catch (Exception ex){val="";}
							
						if(val==null || (val!=null && val.equals(""))){
						    
							val=combo.getSelectedItem().toString();
						}
					}
					
					//modifies the value of the attribute
					if(val!=null && ! val.equals("")){
					    
					    resourceObjectAttribute.setValue(val);
					}
				}
			};
				
			//adds a listener to the combo box
			combo.addActionListener(comboListener);
			
            //the panel containing the combo
            JPanel comboPanel=new JPanel();
            comboPanel.setLayout(new BoxLayout(comboPanel, BoxLayout.X_AXIS));
            comboPanel.add(combo);
            comboPanel.setBorder(new EmptyBorder(0, 20, 0, 0));
            JPanel panel=new JPanel();
            panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
            panel.add(comboPanel);

            component=panel;
            
            disposer=new Runnable(){

                public void run() {

                    //removes the combo listener
                    combo.removeActionListener(comboListener);
                    itemList.clear();
                }
            };
        }
    }
}