Author: drobiazko
Date: Sun Nov 22 14:10:08 2009
New Revision: 883081
URL: http://svn.apache.org/viewvc?rev=883081&view=rev
Log:
TAP5-138: Add Zone parameter to Select component
Added:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/app1/SelectZoneDemo.tml
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java
(with props)
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/SelectZoneDemo.java
(with props)
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/EventConstants.java
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.java
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.xdoc
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/resources/org/apache/tapestry5/tapestry.js
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/IntegrationTests.java
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/Index.java
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/EventConstants.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/EventConstants.java?rev=883081&r1=883080&r2=883081&view=diff
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/EventConstants.java
(original)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/EventConstants.java
Sun Nov 22 14:10:08 2009
@@ -149,4 +149,13 @@
* @SINCE 5.1.0.4
*/
public static final String PROVIDE_COMPLETIONS = "providecompletions";
+
+ /**
+ * Event triggered by {...@link
org.apache.tapestry5.corelib.components.Select} component to inform its
+ * container that Select's value has changed.
+ *
+ * @since 5.2.0.0
+ */
+ public static final String VALUE_CHANGED = "valuechanged";
+
}
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.java?rev=883081&r1=883080&r2=883081&view=diff
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.java
(original)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.java
Sun Nov 22 14:10:08 2009
@@ -18,14 +18,22 @@
import org.apache.tapestry5.annotations.*;
import org.apache.tapestry5.corelib.base.AbstractField;
import org.apache.tapestry5.corelib.data.BlankOption;
+import org.apache.tapestry5.corelib.internal.ComponentActionSink;
+import org.apache.tapestry5.corelib.internal.HiddenFieldPositioner;
import org.apache.tapestry5.corelib.mixins.RenderDisabled;
import org.apache.tapestry5.internal.TapestryInternalUtils;
+import org.apache.tapestry5.internal.services.PageRenderQueue;
+import org.apache.tapestry5.internal.util.Holder;
import org.apache.tapestry5.internal.util.SelectModelRenderer;
import org.apache.tapestry5.ioc.Messages;
import org.apache.tapestry5.ioc.annotations.Inject;
+import org.apache.tapestry5.ioc.internal.util.IdAllocator;
import org.apache.tapestry5.ioc.internal.util.InternalUtils;
+import org.apache.tapestry5.json.JSONArray;
+import org.apache.tapestry5.json.JSONObject;
import org.apache.tapestry5.services.*;
import org.apache.tapestry5.util.EnumSelectModel;
+import org.slf4j.Logger;
import java.util.Locale;
@@ -39,9 +47,12 @@
* can be overriden by binding the encoder parameter, or extended by
contributing a {...@link ValueEncoderFactory} into the
* service's configuration.
*/
-...@events(EventConstants.VALIDATE)
+...@events({EventConstants.VALIDATE, EventConstants.VALUE_CHANGED + " when 'zone'
parameter is bound"})
public class Select extends AbstractField
{
+ public static final String FORM_COMPONENTID_PARAMETER =
"t:formcomponentid";
+ public static final String CHANGE_EVENT = "change";
+
private class Renderer extends SelectModelRenderer
{
@@ -116,9 +127,47 @@
*/
@Parameter(required = true, principal = true, autoconnect = true)
private Object value;
+
+ /**
+ * Binding the zone parameter will cause any change of Select's value to
be handled as an Ajax request that updates the
+ * indicated zone. The component will trigger the event {...@link
EventConstants#VALUE_CHANGED} to inform its
+ * container that Select's value has changed.
+ *
+ * @since 5.2.0.0
+ */
+ @Parameter(defaultPrefix = BindingConstants.LITERAL)
+ private String zone;
+
+ @Inject
+ private FieldValidationSupport fieldValidationSupport;
+
+ @Environmental
+ private FormSupport formSupport;
+
+ @Inject
+ private Environment environment;
+
+ @Inject
+ private RenderSupport renderSupport;
+
+ @Inject
+ private ComponentResources componentResources;
+
+ @Inject
+ private HiddenFieldLocationRules rules;
@Inject
- private FieldValidationSupport fieldValidationSupport;
+ private Logger logger;
+
+ @Inject
+ private ClientDataEncoder clientDataEncoder;
+
+ @Inject
+ private ComponentSource componentSource;
+
+ @Inject
+ private PageRenderQueue pageRenderQueue;
+
@SuppressWarnings("unused")
@Mixin
@@ -139,9 +188,7 @@
tracker.recordInput(this, submittedValue);
- Object selectedValue = InternalUtils.isBlank(submittedValue)
- ? null :
- encoder.toValue(submittedValue);
+ Object selectedValue = toValue(submittedValue);
try
{
@@ -169,7 +216,86 @@
resources.renderInformalParameters(writer);
// Disabled is via a mixin
+
+ if (this.zone != null)
+ {
+ final Link link = this.resources.createEventLink(CHANGE_EVENT);
+
+ link.addParameter(FORM_COMPONENTID_PARAMETER,
this.formSupport.getFormComponentId());
+
+ final JSONArray spec = new JSONArray();
+ spec.put("change");
+ spec.put(getClientId());
+ spec.put(this.zone);
+ spec.put(link.toAbsoluteURI());
+
+ this.renderSupport.addInit("updateZoneOnEvent", spec);
+ }
+
}
+
+ Object onChange()
+ {
+ final String formId =
this.request.getParameter(FORM_COMPONENTID_PARAMETER);
+
+ final String changedValue = this.request.getParameter("t:selectvalue");
+
+ final Object newValue = toValue(changedValue);
+
+ final Holder<Object> holder = Holder.create();
+
+ final ComponentEventCallback callback = new ComponentEventCallback()
+ {
+ public boolean handleResult(final Object result)
+ {
+
+ holder.put(result);
+
+ Select.this.value = newValue;
+
+ return true;
+ }
+ };
+
+ this.componentResources.triggerEvent(EventConstants.VALUE_CHANGED, new
Object[] { newValue }, callback);
+
+ final PartialMarkupRendererFilter filter = new PartialMarkupRendererFilter()
+ {
+ public void renderMarkup(MarkupWriter writer, JSONObject reply, PartialMarkupRenderer renderer)
+ {
+
+ HiddenFieldPositioner hiddenFieldPositioner = new
HiddenFieldPositioner(writer, Select.this.rules);
+
+ final ComponentActionSink actionSink = new
ComponentActionSink(Select.this.logger, Select.this.clientDataEncoder);
+
+ final Form form = (Form)
Select.this.componentSource.getComponent(formId);
+
+ FormSupport formSupport =
form.createRenderTimeFormSupport(form.getClientId(), actionSink, new
IdAllocator());
+
+ Select.this.environment.push(FormSupport.class, formSupport);
+ Select.this.environment.push(ValidationTracker.class, new
ValidationTrackerImpl());
+
+ renderer.renderMarkup(writer, reply);
+
+ Select.this.environment.pop(ValidationTracker.class);
+ Select.this.environment.pop(FormSupport.class);
+
+ hiddenFieldPositioner.getElement().attributes("type", "hidden", "name", Form.FORM_DATA,
+ "value", actionSink.getClientData());
+
+ }
+ };
+
+ this.pageRenderQueue.addPartialMarkupRendererFilter(filter);
+
+ return holder.get();
+ }
+
+ protected Object toValue(final String submittedValue)
+ {
+ return InternalUtils.isBlank(submittedValue) ? null :
this.encoder.toValue(submittedValue);
+ }
+
@SuppressWarnings("unchecked")
ValueEncoder defaultEncoder()
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.xdoc
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.xdoc?rev=883081&r1=883080&r2=883081&view=diff
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.xdoc
(original)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/java/org/apache/tapestry5/corelib/components/Select.xdoc
Sun Nov 22 14:10:08 2009
@@ -171,5 +171,119 @@
</section>
+ <section name="Chaining of Select components">
+ There is often a requirement for chaining Select components. When a value of a Select component is changed
+ another Select should become visible. Let's consider the following example: you create an online shop for a car seller.
+ A make is modeled as enumeration CarMaker.
+
+ <subsection name="CarMaker.java">
+ <source><![CDATA[
+public enum CarMaker
+{
+ MERCEDES, AUDI, BMW;
+}]]></source>
+ </subsection>
+
+ <subsection name="SelectZoneDemo.tml">
+ The Select component 'carMaker' of the page SelectZoneDemo shows all available car makers.
+ When a user selects a car maker, another Select component for selecting available models of the make should appear.
+ This can be accomplished by the parameter <em>zone</em> of the Select component 'carMaker'. When <em>zone</em> parameter is bound
+ every change of the Select's value causes an ajax request. In this case the Select component publishes the event <em>valuechanged</em> which can
+ be used to provide the <em>model</em> for the second Select component.
+ <source><![CDATA[
+<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd";>
+ <t:form>
+ <p>
+ <t:errors />
+ </p>
+ <p>
+ <t:select t:id="carMaker" validate="required" blankOption="always"
+ model="makeModel" zone="modelZone" encoder="makeEncoder" />
+ </p>
+
+ <t:zone t:id="modelZone">
+ <t:if test="carMaker">
+ <t:delegate to="modelBlock" />
+ </t:if>
+ </t:zone>
+
+ <t:block id="modelBlock">
+ <p>
+ <t:select t:id="carModel" model="availableModels"
validate="required"/>
+ </p>
+ </t:block>
+
+ <p>
+ <t:submit value="literal:Submit" />
+ </p>
+ </t:form>
+
+</html>]]></source>
+ </subsection>
+
+ <subsection name="SelectZoneDemo.java">
+ The event handler method for the event
<em>valuechanged</em> is used to provide the available car models of the
currently selected car maker.
+ The new Select's value is passed as context.
+ <source><![CDATA[
+public class SelectZoneDemo
+{
+
+ @Inject
+ private Messages messages;
+
+ @Property
+ @Persist
+ private CarMaker carMaker;
+
+ @Property
+ @Persist
+ private String carModel;
+
+ @Inject
+ @Property
+ private Block modelBlock;
+
+ @Property
+ @Persist
+ private List<String> availableModels;
+
+ public Object onValueChanged(final CarMaker maker)
+ {
+ availableModels = findAvailableModels(maker);
+
+ return this.modelBlock;
+ }
+
+ public List<String> findAvailableModels(final CarMaker maker)
+ {
+ switch (maker)
+ {
+ case AUDI:
+ return Arrays.asList("A4", "A6", "A8");
+ case BMW:
+ return Arrays.asList("3 Series", "5 Series", "7 Series");
+ case MERCEDES:
+ return Arrays.asList("C-Class", "E-Class", "S-Class");
+ default:
+ return Arrays.asList();
+ }
+ }
+
+ public SelectModel getMakeModel()
+ {
+ return new EnumSelectModel(CarMaker.class, this.messages);
+ }
+
+ public ValueEncoder<CarMaker> getMakeEncoder()
+ {
+ return new EnumValueEncoder<CarMaker>(CarMaker.class);
+ }
+
+}]]></source>
+
+ </subsection>
+
+ </section>
+
</body>
</document>
\ No newline at end of file
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/resources/org/apache/tapestry5/tapestry.js
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/resources/org/apache/tapestry5/tapestry.js?rev=883081&r1=883080&r2=883081&view=diff
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/resources/org/apache/tapestry5/tapestry.js
(original)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/main/resources/org/apache/tapestry5/tapestry.js
Sun Nov 22 14:10:08 2009
@@ -763,6 +763,11 @@
*/
linkZone : function(element, zoneId, url)
{
+ Tapestry.Initializer.updateZoneOnEvent("click", element, zoneId, url);
+ },
+
+ updateZoneOnEvent : function(eventName, element, zoneId, url)
+ {
element = $(element);
// Update the element with the id of zone div. This may be changed dynamically on the client
@@ -799,17 +804,24 @@
return;
}
- // Otherwise, assume it's just an ordinary link.
+ // Otherwise, assume it's just an ordinary link or input field.
- element.observe("click", function(event)
+ element.observe(eventName, function(event)
{
Event.stop(event);
var zoneObject = Tapestry.findZoneManager(element);
if (!zoneObject) return;
+
+ var newUrl = url;
+
+ if(element.tagName == "SELECT" && element.value)
+ {
+ newUrl+='&t:selectvalue='+element.value;
+ }
- zoneObject.updateFromURL(url);
+ zoneObject.updateFromURL(newUrl);
});
},
Added:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/app1/SelectZoneDemo.tml
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/app1/SelectZoneDemo.tml?rev=883081&view=auto
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/app1/SelectZoneDemo.tml
(added)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/app1/SelectZoneDemo.tml
Sun Nov 22 14:10:08 2009
@@ -0,0 +1,30 @@
+<t:border xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd";>
+ <p>Car Maker: ${carMaker}</p>
+ <p>Car Model: ${carModel}</p>
+ <t:form>
+ <p>
+ <t:errors />
+ </p>
+ <p>
+ <t:select t:id="carMaker" validate="required"
blankOption="always"
+ model="makeModel" zone="modelZone"
encoder="makeEncoder" />
+ </p>
+
+ <t:zone t:id="modelZone">
+ <t:if test="carMaker">
+ <t:delegate to="modelBlock" />
+ </t:if>
+ </t:zone>
+
+ <t:block id="modelBlock">
+ <p id="carModelContainer">
+ <t:select t:id="carModel" model="availableModels"
validate="required" blankOption="always" />
+ </p>
+ </t:block>
+
+ <p>
+ <t:submit value="literal:Submit" />
+ </p>
+ </t:form>
+
+</t:border>
\ No newline at end of file
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/IntegrationTests.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/IntegrationTests.java?rev=883081&r1=883080&r2=883081&view=diff
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/IntegrationTests.java
(original)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/IntegrationTests.java
Sun Nov 22 14:10:08 2009
@@ -2291,6 +2291,16 @@
waitForCondition(condition, PAGE_LOAD_TIMEOUT);
}
+
+ private void waitForElementToDisappear(String elementId)
+ {
+
+ String condition =
String.format("selenium.browserbot.getCurrentWindow().$(\"%s\").hide()",
+ elementId);
+
+ waitForCondition(condition, PAGE_LOAD_TIMEOUT);
+ }
+
private void waitForCSSSelectedElementToAppear(String cssRule)
{
@@ -2963,4 +2973,48 @@
assertText("eventfired", "true");
}
+
+ /**
+ * TAP5-138
+ */
+ @Test
+ public void select_zone()
+ {
+ start("Select Zone Demo");
+
+ type("carMaker", "BMW");
+
+ waitForElementToAppear("carModelContainer");
+
+ click(SUBMIT);
+
+ String condition = String.format("selenium.browserbot.getCurrentWindow().$$(\"%s\")", "t-error-popup");
+
+ waitForCondition(condition, PAGE_LOAD_TIMEOUT);
+
+ assertText(String.format("//d...@class='%s']/span", "t-error-popup"), "You must provide a value for Car Model.");
+
+ type("carModel", "7 Series");
+
+ clickAndWait(SUBMIT);
+
+ assertTextPresent("Car Maker: BMW");
+
+ assertTextPresent("Car Model: 7 Series");
+
+ waitForElementToDisappear("carModelContainer");
+
+ type("carMaker", "MERCEDES");
+
+ waitForElementToAppear("carModelContainer");
+
+ type("carModel", "E-Class");
+
+ clickAndWait(SUBMIT);
+
+ assertTextPresent("Car Maker: MERCEDES");
+
+ assertTextPresent("Car Model: E-Class");
+ }
+
}
\ No newline at end of file
Added:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java?rev=883081&view=auto
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java
(added)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java
Sun Nov 22 14:10:08 2009
@@ -0,0 +1,19 @@
+// Copyright 2009 The Apache Software Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package org.apache.tapestry5.integration.app1.data;
+
+public enum CarMaker
+{
+ MERCEDES, AUDI, BMW;
+}
Propchange:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java
------------------------------------------------------------------------------
svn:eol-style = native
Propchange:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/data/CarMaker.java
------------------------------------------------------------------------------
svn:mime-type = text/plain
Modified:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/Index.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/Index.java?rev=883081&r1=883080&r2=883081&view=diff
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/Index.java
(original)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/Index.java
Sun Nov 22 14:10:08 2009
@@ -352,7 +352,10 @@
new Item("SubmitWithContext", "Submit With Context",
"Providing a context for Submit component"),
- new Item("ImageSubmitDemo", "Submit with an Image Demo", "Make sure that submit with the image parameter set triggers the 'selected' event.")
+ new Item("ImageSubmitDemo", "Submit with an Image Demo", "Make sure
that submit with the image parameter set triggers the 'selected' event."),
+
+ new Item("SelectZoneDemo", "Select Zone Demo", "Use a Select component to update a zone.")
+
);
Added:
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/SelectZoneDemo.java
URL:
http://svn.apache.org/viewvc/tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/SelectZoneDemo.java?rev=883081&view=auto
==============================================================================
---
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/SelectZoneDemo.java
(added)
+++
tapestry/tapestry5/branches/5.1.0.x-dev/tapestry-core/src/test/java/org/apache/tapestry5/integration/app1/pages/SelectZoneDemo.java
Sun Nov 22 14:10:08 2009
@@ -0,0 +1,84 @@
+// Copyright 2009 The Apache Software Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package org.apache.tapestry5.integration.app1.pages;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.tapestry5.Block;
+import org.apache.tapestry5.SelectModel;
+import org.apache.tapestry5.ValueEncoder;
+import org.apache.tapestry5.annotations.Persist;
+import org.apache.tapestry5.annotations.Property;
+import org.apache.tapestry5.integration.app1.data.CarMaker;
+import org.apache.tapestry5.ioc.Messages;
+import org.apache.tapestry5.ioc.annotations.Inject;
+import org.apache.tapestry5.util.EnumSelectModel;
+import org.apache.tapestry5.util.EnumValueEncoder;
+
+public class SelectZoneDemo
+{
+
+ @Inject
+ private Messages messages;
+
+ @Property
+ @Persist
+ private CarMaker carMaker;
+
+ @Property
+ @Persist
+ private String carModel;
+
+ @Inject
+ @Property
+ private Block modelBlock;
+
+ @Property
+ @Persist
+ private List<String> availableModels;
+
+ public Object onValueChanged(final CarMaker maker)
+ {
+ availableModels = findAvailableModels(maker);
+
+ return this.modelBlock;
+ }
+
+ public List<String> findAvailableModels(final CarMaker maker)
+ {
+ switch (maker)
+ {
+ case AUDI:
+ return Arrays.asList("A4", "A6", "A8");
+ case BMW:
+ return Arrays.asList("3 Series", "5 Series", "7 Series");
+ case MERCEDES:
+ return Arrays.asList("C-Class", "E-Class", "S-Class");
+ default:
+ return Arrays.asList();
+ }
+ }
+
+ public SelectModel getMakeModel()
+ {
+ return new EnumSelectModel(CarMaker.class, this.messages);
+ }
+
+ public ValueEncoder<CarMaker> getMakeEncoder()
+ {
+ return new EnumValueEncoder<CarMaker>(CarMaker.class);
+ }
+
+}
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