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.Latitude;
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 LatitudeUIComponent extends UIInput
018 {
019 private static Logger log = Logger.getLogger(LatitudeUIComponent.class);
020 private Boolean enabled = null;
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 Latitude d = (Latitude)getValue();
028 String styleClass = (String)getAttributes().get("styleClass");
029 String style = (String)getAttributes().get("style");
030
031 ResponseWriter writer = context.getResponseWriter();
032
033 String decId = getClientId(context) + "dec";
034 String unitId = getClientId(context) + "units";
035
036 //Label and input field for Latitude 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", decId, null);
044 writer.writeAttribute("name", decId, null);
045 writer.writeAttribute("value", d.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
071 ArcUnits arcUnits = d.getUnits();
072
073 //Write out the option elements.
074 for (ArcUnits unit : unitSet)
075 {
076 writer.startElement("option", this);
077 if(unit.equals(arcUnits))
078 {
079 log.debug("Found the selected value! " + arcUnits);
080 writer.writeAttribute("selected", "selected", null);
081 }
082
083 writer.writeAttribute("value", unit.name(), null);
084
085 writer.write(unit.toString());
086 writer.endElement("option");
087 }
088
089 writer.endElement("select");
090 writer.endElement("div");
091 }
092
093 /**
094 * Overridden to be empty.
095 */
096 public void encodeEnd(FacesContext context)
097 throws IOException
098 {
099
100 }
101
102 /**
103 * Overridden to be empty.
104 */
105 public void encodeChildren(FacesContext context)
106 throws IOException
107 {
108
109 }
110
111 public void decode(FacesContext context)
112 {
113 String decId = getClientId(context) + "dec";
114 String unitId = getClientId(context) + "units";
115
116 Map parms = context.getExternalContext().getRequestParameterMap();
117 String dec = (String)parms.get(decId);
118 String unit = (String)parms.get(unitId);
119
120 if (dec == null || unit == null)
121 {
122 setSubmittedValue(null);
123 }
124
125 else
126 //The submitted value will be "$dec $units"
127 setSubmittedValue(dec + ArcUnits.valueOf(unit).getSymbol());
128 }
129
130 public Boolean isEnabled()
131 {
132 if (this.enabled != null)
133 return this.enabled;
134
135 ValueBinding vb = getValueBinding("enabled");
136 if (vb != null)
137 {
138 Object val = vb.getValue(getFacesContext());
139
140 if (val instanceof Boolean && val != null)
141 return (Boolean)val;
142 }
143
144 //else
145 return Boolean.TRUE;
146 }
147
148 public void setEnabled(Boolean e)
149 {
150 this.enabled = e;
151 }
152
153 public Object saveState(FacesContext context)
154 {
155 Object[] state = new Object[2];
156 state[0] = super.saveState(context);
157 state[1] = this.enabled;
158
159 return state;
160 }
161
162 public void restoreState(FacesContext context, Object state)
163 {
164 Object[] myState = (Object[])state;
165 super.restoreState(context, myState[0]);
166 setEnabled((Boolean)myState[1]);
167 }
168 }