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Java > Open Source Codes > org > enhydra > jawe > xml > panels > XMLListChoicePanel


1 /* XMLListChoicePanel.java
2  *
3  * Authors:
4  * Stefanovic Nenad chupo@iis.ns.ac.yu
5  * Bojanic Sasa sasaboy@neobee.net
6  * Puskas Vladimir vpuskas@eunet.yu
7  * Pilipovic Goran zboniek@uns.ac.yu
8  *
9  */
10
11
12 package org.enhydra.jawe.xml.panels;
13
14 import org.enhydra.jawe.xml.*;
15
16 import java.util.*;
17 import javax.swing.*;
18 import javax.swing.event.*;
19 import java.awt.*;
20 import java.awt.event.*;
21
22 /**
23  * Creates a list panel and a panel which type is determined by the
24  * choosen element from list panel.
25  */
26 public class XMLListChoicePanel extends XMLPanel {
27
28    XMLPanel prevPanel=null;
29
30    boolean errorFlag=false;
31
32    public XMLListChoicePanel (XMLCollection myOwner) {
33       this(myOwner,"");
34    }
35
36    public XMLListChoicePanel (XMLCollection myOwner,String JavaDoc title) {
37       this(myOwner,title,XMLPanel.BOX_LAYOUT);
38    }
39
40    public XMLListChoicePanel (XMLCollection myOwner,String JavaDoc title,
41                               int layout) {
42       this(myOwner,title,layout,true);
43    }
44
45    public XMLListChoicePanel (XMLCollection myOwner,String JavaDoc title,
46                               int layout,boolean isVertical) {
47       this(myOwner,title,layout,isVertical,true);
48    }
49
50    public XMLListChoicePanel (XMLCollection myOwner,String JavaDoc title,
51                               int layout,boolean isVertical,boolean hasBorder) {
52
53       super(myOwner,3,title,layout,isVertical,hasBorder);
54
55       final XMLListPanel pList=new XMLListPanel(myOwner,"",false,false,true);
56       add(pList);
57       final JScrollPane jsp=new JScrollPane();
58       jsp.setAlignmentX(Component.LEFT_ALIGNMENT);
59       jsp.setAlignmentY(Component.TOP_ALIGNMENT);
60       jsp.setMinimumSize(new Dimension(300,225));
61       //jsp.setPreferredSize(new Dimension(300,225));
62 add(jsp);
63
64       final JList jl=pList.getList();
65       jl.addListSelectionListener(new ListSelectionListener() {
66                public void valueChanged(ListSelectionEvent e) {
67                   if (pList.isItemChangingPosition() || errorFlag) return;
68                   if (prevPanel!=null) {
69                      if (canApplyChanges(prevPanel)) {
70                         prevPanel.setElements();
71                         if (!getOwner().isReadOnly()) {
72                            ((XMLElementDialog)prevPanel.getDialog()).
73                               notifyListeners(prevPanel.getOwner());
74                         }
75                      }else {
76                         errorFlag=true;
77                         pList.setChanging();
78                         jl.setSelectedIndex(e.getFirstIndex());
79                         errorFlag=false;
80                         return;
81                      }
82                   }
83
84                   XMLElement choosen=null;
85                   try {
86                      choosen=(XMLElement)jl.getSelectedValue();
87                   } catch (Exception JavaDoc ex) {}
88
89                   if (choosen!=null) {
90                      prevPanel=choosen.getPanel();
91                      jsp.setViewportView(prevPanel);
92                   } else {
93                      jsp.setViewportView(new XMLPanel());
94                   }
95                }
96             });
97       jl.setSelectedIndex(0);
98       if (layout==XMLPanel.BOX_LAYOUT) {
99          if (isVertical) {
100             add(Box.createVerticalGlue());
101          }
102          else {
103             add(Box.createHorizontalGlue());
104          }
105       }
106    }
107
108    protected boolean canApplyChanges (XMLPanel panelToEdit) {
109       if (panelToEdit.checkRequired()) {
110          if (!panelToEdit.getOwner().isValidEnter(panelToEdit)) {
111             return false;
112          }
113          if (panelToEdit.getOwner() instanceof XMLCollectionElement) {
114             if (((XMLCollectionElement)panelToEdit.getOwner()).
115                 isIDUniqueAndValid(panelToEdit)) {
116                return true;
117             } else {
118                return false;
119             }
120          } else {
121             return true;
122          }
123       } else {
124          return false;
125       }
126    }
127
128    public JList getList () {
129       return ((XMLListPanel)getComponent(0)).getList();
130    }
131
132    public XMLPanel getDisplayedPanel () {
133       return prevPanel;
134    }
135
136    public void setElements () {
137       //try {
138 // setting List panel
139 ((XMLPanel)getComponent(0)).setElements();
140       // setting implementation panel
141 JScrollPane jsp=(JScrollPane)getComponent(1);
142       JViewport jvp=(JViewport)jsp.getComponent(0);
143       ((XMLPanel)jvp.getComponent(0)).setElements();
144       //} catch (Exception e) {}
145 }
146
147 }
148
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