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


1 /* XMLRadioPanel.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
19 import java.awt.*;
20 /**
21 * Creates a panel with radio buttons.
22 */
23 public class XMLRadioPanel extends XMLPanel {
24    private ButtonGroup rGroup;
25
26    public XMLRadioPanel (XMLChoice myOwner) {
27       this(myOwner,"");
28    }
29
30    public XMLRadioPanel (XMLChoice myOwner,String JavaDoc title) {
31       this(myOwner,title,XMLPanel.BOX_LAYOUT);
32    }
33
34    public XMLRadioPanel (XMLChoice myOwner,String JavaDoc title,
35       int layout) {
36       this(myOwner,title,layout,true);
37    }
38
39    public XMLRadioPanel (XMLChoice myOwner,String JavaDoc title,
40       int layout,boolean isVertical) {
41       this(myOwner,title,layout,isVertical,true);
42    }
43
44    public XMLRadioPanel (XMLChoice myOwner,String JavaDoc title,
45       int layout,boolean isVertical,boolean hasBorder) {
46
47       super(myOwner,2,title,layout,false,hasBorder);
48
49       XMLPanel bgPanel=new XMLPanel(myOwner,myOwner.getChoices().length,"",layout,isVertical,false);
50
51       int noOfElements=myOwner.getChoices().length;
52
53       if (noOfElements>2) {
54          int half=(int)noOfElements/2;
55          if ((double)half!=noOfElements/2) half++;
56          if (half>1) {
57             bgPanel.setLayout(new GridLayout(half,half));
58          }
59          else {
60             int m,n;
61             if (isVertical) {
62                m=2*half; n=1;
63             }
64             else {
65                m=1; n=2*half;
66             }
67             bgPanel.setLayout(new GridLayout(m,n));
68          }
69       }
70
71       rGroup = new ButtonGroup();
72       Object JavaDoc[] c=myOwner.getChoices();
73       for (int i=0; i<c.length; i++) {
74          JRadioButton jr=new JRadioButton(c[i].toString());
75          if (c[i]==myOwner.getChoosen()) {
76             jr.setSelected(true);
77          }
78          jr.setEnabled(!myOwner.isReadOnly());
79          // Group the radio buttons.
80 rGroup.add(jr);
81          bgPanel.add(jr);
82       }
83       add(Box.createHorizontalGlue());
84       add(bgPanel);
85    }
86
87    public void setElements () {
88       //if (getOwner() instanceof DTDAttribute) {
89 getOwner().setValue(getSelectedItem());
90       //}
91 }
92
93    public Object JavaDoc getSelectedItem() {
94       Enumeration e=rGroup.getElements();
95       int i=0;
96       while (e.hasMoreElements()) {
97          JRadioButton jr=(JRadioButton)e.nextElement();
98          if (jr.isSelected()) {
99             return ((XMLChoice)getOwner()).getChoices()[i];
100          }
101          i++;
102       }
103       return null;
104    }
105
106    public ButtonGroup getButtonGroup () {
107       return rGroup;
108    }
109
110 }
111
112 /* End of DTDRadioPanel.java */
113
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