mapzonespage.java

来自「这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统」· Java 代码 · 共 201 行

package net.sf.dz.setup.core;

import java.awt.event.ActionEvent;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.SortedSet;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;

import org.freehold.jukebox.logger.Logger;

import net.sf.dz.util.wizard.DoubleListPanel;
import net.sf.dz.util.wizard.Wizard;
import net.sf.dz.util.wizard.WizardPage;

class MapZonesPage extends WizardPage {

    private JList zoneList;
    private JList unitList;
    
    private JButton assignButton;
    private JButton detachButton;
    
    private DoubleListPanel dlp;
    
    public MapZonesPage(Logger logger, Wizard owner) {
    
        super(logger, owner, "Map Servos to Temperature Zones");

        List buttonNames = new LinkedList();
        
        buttonNames.add("Assign >>");
        buttonNames.add("<< Detach");
        
        dlp = new DoubleListPanel(getContentPane(), this,
                                  "Temperature Zones",
                                  "Units",
                                  buttonNames);
        
        assignButton = dlp.getButton(0);
        detachButton = dlp.getButton(1);
        
        zoneList = dlp.leftList;
        unitList = dlp.rightList;
        
        zoneList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        unitList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        
        assignButton.setEnabled(false);
        detachButton.setEnabled(false);
    }

    public void activate() {

        SortedSet zoneSet = getSortedContextValues("zone.");
        SortedSet unitSet = getSortedContextValues("unit.");
        
        // Take care to preserve existing selection, if any
        
        Object selected = null;
        
        if ( zoneList.getSelectedIndex() != -1 ) {
        
            selected = zoneList.getSelectedValue();
        }
            
        zoneList.setListData(new Vector(zoneSet));
        
        if ( selected != null ) {
        
            zoneList.setSelectedValue(selected, true);

        } else if ( !zoneSet.isEmpty() ) {
        
            zoneList.setSelectedIndex(0);
        }
        
        if ( unitList.getSelectedIndex() != -1 ) {
        
            selected = unitList.getSelectedValue();
        }
        
        unitList.setListData(new Vector(unitSet));
        
        if ( selected != null ) {
        
            unitList.setSelectedValue(selected, true);

        } else if ( !unitSet.isEmpty() ) {
        
            unitList.setSelectedIndex(0);
        }
        
    }
    
    public String validate() {
    
        UnitDescriptor ud = null;
        ZoneDescriptor zd = null;
        
        // Check which buttons have to be enabled must happen before the
        // validation check, otherwise the buttons will just stay
        // disabled

        if (zoneList.getSelectedIndex() != -1) {
        
            zd =  (ZoneDescriptor)zoneList.getSelectedValue();
        }
        
        if (unitList.getSelectedIndex() != -1) {
        
            ud = (UnitDescriptor)unitList.getSelectedValue();
        }
        
        assignButton.setEnabled(ud != null && zd != null
                             && !ud.zoneSet.contains(zd) && zd.unit == null);
        detachButton.setEnabled(zd != null && zd.unit != null);
        
        // Validation succeeds when there are no unassigned zones, and
        // no units that don't have any zones assigned to them.
        
        Map context = getOwner().getContext();
        
        for ( Iterator i = context.keySet().iterator(); i.hasNext(); ) {
        
            String key = i.next().toString();
            
            if ( key.startsWith("zone.") ) {
            
                zd = (ZoneDescriptor)context.get(key);
                
                if ( zd.unit == null ) {
                
                    return "Some zones (at least'" + zd.name + "') aren't assigned - assign, or delete zone";
                }
            }
        }
        
        for ( Iterator i = context.keySet().iterator(); i.hasNext(); ) {
        
            String key = i.next().toString();
            
            if ( key.startsWith("unit.") ) {
            
                ud = (UnitDescriptor)context.get(key);
                
                if ( ud.zoneSet.isEmpty() ) {
                
                    return "Some units (at least '" + ud.name + "') don't have zones assigned - assign, or delete unit";
                }
            }
        }
        

        return "";
    }
    
    public boolean isEnabled() {
    
        return true;
    }
    
    public String getHelpURL() {
    
        return "FIXME";
    }
    
    public void actionPerformed2(ActionEvent e) {
        
        Object source = e.getSource();
        UnitDescriptor ud = (UnitDescriptor)unitList.getSelectedValue();
        ZoneDescriptor zd = (ZoneDescriptor)zoneList.getSelectedValue();
        
        if ( assignButton == source ) {
        
            ud.zoneSet.add(zd);
            zd.unit = ud;
        
        } else if ( detachButton == source ) {
        
            zd.unit.zoneSet.remove(zd);
            zd.unit = null;
        }
        
        zoneList.validate();
        unitList.validate();
        
        zoneList.repaint();
        unitList.repaint();
    }
    
    public void valueChanged2(ListSelectionEvent e) {
    
    }
}