001 package edu.nrao.sss.webapp.faces.component;
002
003 import javax.faces.component.UIInput;
004 import javax.faces.context.FacesContext;
005 import javax.faces.context.ResponseWriter;
006 import javax.faces.el.ValueBinding;
007 import edu.nrao.sss.util.EnumerationUtility;
008 import edu.nrao.sss.measure.ArcUnits;
009 import edu.nrao.sss.measure.Longitude;
010
011 import java.io.IOException;
012 import java.util.Map;
013 import java.util.EnumSet;
014
015 import org.apache.log4j.Logger;
016
017 public class LongitudeUIComponent extends UIInput
018 {
019 private static Logger log = Logger.getLogger(LongitudeUIComponent.class);
020 private Boolean enabled = true;
021
022 private static final EnumSet<ArcUnits> unitSet = EnumerationUtility.getSharedInstance().getSelectableSetFor(ArcUnits.class);
023
024 public void encodeBegin(FacesContext context)
025 throws IOException
026 {
027 Longitude ra = (Longitude)getValue();
028 String styleClass = (String)getAttributes().get("styleClass");
029 String style = (String)getAttributes().get("style");
030
031 ResponseWriter writer = context.getResponseWriter();
032
033 String raId = getClientId(context) + "ra";
034 String unitId = getClientId(context) + "units";
035
036 //Label and input field for ra value.
037 writer.startElement("div", this);
038 writer.writeAttribute("class", styleClass, null);
039 writer.writeAttribute("style", style, null);
040
041 writer.startElement("input", this);
042 writer.writeAttribute("type", "text", null);
043 writer.writeAttribute("id", raId, null);
044 writer.writeAttribute("name", raId, null);
045 writer.writeAttribute("value", ra.getValue(), null);
046
047 if (!isEnabled())
048 writer.writeAttribute("disabled", "true", null);
049
050 writer.endElement("input");
051
052 writer.endElement("div");
053
054 //Label and select menu for arc units.
055 writer.startElement("div", this);
056 writer.writeAttribute("class", styleClass, null);
057 writer.writeAttribute("style", style, null);
058
059 writer.startElement("label", this);
060 writer.writeAttribute("for", unitId, null);
061 writer.write(" in ");
062 writer.endElement("label");
063
064 writer.startElement("select", this);
065 writer.writeAttribute("name", unitId, null);
066
067 if (!isEnabled())
068 writer.writeAttribute("disabled", "true", null);
069
070 ArcUnits arcUnits = ra.getUnits();
071
072 //Write out the option elements.
073 for (ArcUnits unit : unitSet)
074 {
075 writer.startElement("option", this);
076 if(unit.equals(arcUnits))
077 {
078 log.debug("Found the selected value! " + arcUnits);
079 writer.writeAttribute("selected", "selected", null);
080 }
081
082 writer.writeAttribute("value", unit.name(), null);
083
084 writer.write(unit.toString());
085 writer.endElement("option");
086 }
087
088 writer.endElement("select");
089 writer.endElement("div");
090 }
091
092 /**
093 * Overridden to be empty.
094 */
095 public void encodeEnd(FacesContext context)
096 throws IOException
097 {
098
099 }
100
101 /**
102 * Overridden to be empty.
103 */
104 public void encodeChildren(FacesContext context)
105 throws IOException
106 {
107
108 }
109
110 public void decode(FacesContext context)
111 {
112 String raId = getClientId(context) + "ra";
113 String unitId = getClientId(context) + "units";
114
115 Map parms = context.getExternalContext().getRequestParameterMap();
116 String ra = (String)parms.get(raId);
117 String unit = (String)parms.get(unitId);
118
119 if (ra == null || unit == null)
120 setSubmittedValue(null);
121
122 else
123 //The submitted value will be "$ra $units"
124 setSubmittedValue(ra + ArcUnits.valueOf(unit).getSymbol());
125 }
126
127 public Boolean isEnabled()
128 {
129 if (this.enabled != null)
130 return this.enabled;
131
132 ValueBinding vb = getValueBinding("enabled");
133 if (vb != null)
134 {
135 Object val = vb.getValue(getFacesContext());
136 if (val != null && val instanceof Boolean)
137 return (Boolean)val;
138 }
139
140 //else
141 return Boolean.TRUE;
142 }
143
144 public void setEnabled(Boolean e)
145 {
146 this.enabled = e;
147 }
148
149 public Object saveState(FacesContext context)
150 {
151 Object[] state = new Object[2];
152 state[0] = super.saveState(context);
153 state[1] = this.enabled;
154
155 return state;
156 }
157
158 public void restoreState(FacesContext context, Object state)
159 {
160 Object[] myState = (Object[])state;
161 super.restoreState(context, myState[0]);
162 setEnabled((Boolean)myState[1]);
163 }
164 }