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1
24 package org.riotfamily.forms.element.select;
25
26 import java.io.IOException  ;
27 import java.io.PrintWriter ;
28 import java.util.ArrayList ;
29 import java.util.HashMap ;
30 import java.util.Iterator ;
31 import java.util.List ;
32 import java.util.Map ;
33
34 import javax.servlet.http.HttpServletRequest ;
35 import javax.servlet.http.HttpServletResponse ;
36
37 import org.riotfamily.common.beans.PropertyUtils;
38 import org.riotfamily.common.markup.DocumentWriter;
39 import org.riotfamily.common.markup.Html;
40 import org.riotfamily.forms.AbstractEditorBase;
41 import org.riotfamily.forms.ContentElement;
42 import org.riotfamily.forms.DHTMLElement;
43 import org.riotfamily.forms.Editor;
44 import org.riotfamily.forms.ErrorUtils;
45 import org.riotfamily.forms.TemplateUtils;
46 import org.riotfamily.forms.event.ChangeEvent;
47 import org.riotfamily.forms.event.ChangeListener;
48 import org.riotfamily.forms.event.JavaScriptEvent;
49 import org.riotfamily.forms.event.JavaScriptEventAdapter;
50 import org.riotfamily.forms.request.FormRequest;
51 import org.riotfamily.forms.resource.FormResource;
52 import org.riotfamily.forms.resource.ResourceElement;
53 import org.riotfamily.forms.resource.ScriptResource;
54 import org.springframework.util.StringUtils;
55
56
62 public abstract class AbstractChooser extends AbstractEditorBase
63 implements Editor, DHTMLElement, JavaScriptEventAdapter,
64 ResourceElement, ContentElement {
65
66 private String displayNameProperty;
67
68 private Object object;
69
70 private String displayName;
71
72 private List listeners;
73
74 private static FormResource RESOURCE =
75 new ScriptResource("form/chooser.js", "Chooser");
76
77
78 public void setDisplayNameProperty(String displayNameProperty) {
79 this.displayNameProperty = displayNameProperty;
80 }
81
82 protected void renderInternal(PrintWriter writer) {
83 DocumentWriter doc = new DocumentWriter(writer);
84 doc.start(Html.DIV);
85 doc.attribute(Html.COMMON_ID, getId());
86 doc.attribute(Html.COMMON_CLASS, "chooser");
87 if (displayName != null) {
88 doc.start(Html.SPAN);
89 doc.body(displayName);
90 doc.end();
91 }
92 doc.start(Html.BUTTON).attribute(Html.COMMON_CLASS, "choose");
93 doc.body("Choose");
94 doc.end();
95 if (!isRequired() && getValue() != null) {
96 doc.start(Html.BUTTON);
97 doc.attribute(Html.COMMON_CLASS, "unset");
98 doc.body("Unset");
99 doc.end();
100 }
101 doc.end();
102 }
103
104 public int getEventTypes() {
105 return 0;
106 }
107
108 public void processRequest(FormRequest request) {
109 validate();
110 }
111
112 protected void validate() {
113 if (isRequired() && object == null) {
114 ErrorUtils.reject(this, "required");
115 }
116 }
117
118 public void handleJavaScriptEvent(JavaScriptEvent event) {
119 setObjectId(event.getValue());
120 getFormListener().elementChanged(this);
121 }
122
123 public FormResource getResource() {
124 return RESOURCE;
125 }
126
127 public String getInitScript() {
128 return "new Chooser('" + getId() + "');";
129 }
130
131 protected abstract Object loadBean(String objectId);
132
133 protected String getDisplayName(Object object) {
134 if (object == null) {
135 return null;
136 }
137 if (displayNameProperty != null) {
138 return PropertyUtils.getPropertyAsString(
139 object, displayNameProperty);
140 }
141 return object.toString();
142 }
143
144 protected void setObjectId(String objectId) {
145 log.debug("Setting objectId to: " + objectId);
146 Object oldObject = object;
147 if (StringUtils.hasLength(objectId)) {
148 object = loadBean(objectId);
149 }
150 else {
151 object = null;
152 }
153 fireChangeEvent(object, oldObject);
154 displayName = getDisplayName(object);
155 }
156
157 public void setValue(Object value) {
158 this.object = value;
159 displayName = getDisplayName(value);
160 }
161
162 public Object getValue() {
163 return object;
164 }
165
166 public void addChangeListener(ChangeListener listener) {
167 if (listeners == null) {
168 listeners = new ArrayList ();
169 }
170 listeners.add(listener);
171 }
172
173 protected void fireChangeEvent(Object newValue, Object oldValue) {
174 if (listeners != null) {
175 ChangeEvent event = new ChangeEvent(this, newValue, oldValue);
176 Iterator it = listeners.iterator();
177 while (it.hasNext()) {
178 ChangeListener listener = (ChangeListener) it.next();
179 listener.valueChanged(event);
180 }
181 }
182 }
183
184 public void handleContentRequest(HttpServletRequest request,
185 HttpServletResponse response) throws IOException {
186
187 response.setContentType("text/html");
188 Map model = new HashMap ();
189 model.put("chooserUrl", request.getContextPath() + getChooserUrl());
190 String template = TemplateUtils.getTemplatePath(AbstractChooser.class,
191 "_content");
192
193 getFormContext().getTemplateRenderer().render(template,
194 model, response.getWriter());
195 }
196
197 protected abstract String getChooserUrl();
198
199 }
200 |
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