geoxygenefilter.java

用于GIS(全球地理系统)的分析和处理的代码。

/*
 * This file is part of the GeOxygene project source files. 
 * 
 * GeOxygene aims at providing an open framework which implements OGC/ISO specifications for 
 * the development and deployment of geographic (GIS) applications. It is a open source 
 * contribution of the COGIT laboratory at the Institut G閛graphique National (the French 
 * National Mapping Agency).
 * 
 * See: http://oxygene-project.sourceforge.net 
 *  
 * Copyright (C) 2005 Institut G閛graphique National
 *
 * 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 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 (see file LICENSE if present); if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *  
 */

package fr.ign.cogit.geoxygene.util.viewer;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

/**
  * Chooser for selecting geographic classes stemming from a mapping file, 
  * in order to be displayed in the viewer.
  *
  * @author Thierry Badard & Arnaud Braun
  * @version 1.0
  * 
  */

class GeOxygeneFilter  {
	
	
	private static final String FRAME_TITLE = "GeOxygene Geographic Classes in Mapping - ";
	private String[] selectedData = new String[0];
	private String[] data ;
	private JList dataList;
	private String userName;


	public  GeOxygeneFilter (Object[] classesNames, String user) {
		userName = user;
		data = new String[classesNames.length];
		for (int i=0; i<data.length; i++)
			data[i] = (String) classesNames[i];
		sortData();
		dataList = new JList(data);
	}
	
	
	public String[] showDialog(Frame parent) {
		final  JDialog dialog = createDialog(parent);
		dialog.show();
		dialog.dispose();
		return selectedData;
	}
	

	private void getSelectedValues() {
		Object[] selectedObjects = dataList.getSelectedValues();
		selectedData = new String[selectedObjects.length];
		for (int i=0; i<selectedObjects.length; i++)
			selectedData[i] = (String) selectedObjects[i];
	}
	
		
	private JDialog createDialog (Frame parent) {	
		
		String title = FRAME_TITLE + userName;	
		final JDialog dialog = new JDialog(parent, title, true);
				
		JScrollPane scrollPane = new JScrollPane(dataList);
		scrollPane.setPreferredSize(new Dimension (500,600));

		JPanel controlPanel =	new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
					
		JButton okButton = new JButton("Ok");
		okButton.setActionCommand("Ok");
		okButton.addActionListener(new ActionListener() {
			 public void actionPerformed(ActionEvent e) {
				 getSelectedValues();
				 dialog.dispose();
				 }
			 });
	 
 		JButton cancelButton = new JButton("Cancel");
		cancelButton.addActionListener(new ActionListener() {
			 public void actionPerformed(ActionEvent e) {
				 dialog.dispose();
			 }
		 });
	 	
		controlPanel.add(okButton);
		controlPanel.add(cancelButton);
	
		Container contentPane = dialog.getContentPane();		
		contentPane.add(scrollPane,BorderLayout.CENTER);	
		contentPane.add(controlPanel, BorderLayout.SOUTH);

		dialog.pack();	
		dialog.setLocationRelativeTo(parent); 

		return dialog;
	}
	
	
	private void sortData () {		
		if (data.length > 1) {
			for (int i=0; i<data.length-1; i++) {
				for (int j=i+1; j<data.length; j++)  {
					String A = new String(data[i]);
					String B = new String(data[j]);
					if (B.compareTo(A) < 0) {
						data[i] = B;
						data[j] = A;
					}
				}
			}
		}
	}
	

}