Custom ListitemRenderer

asked 2006-03-28 14:05:06 +0800

admin
18691 ● 1 ● 10 ● 130

Orignial message at:
https://sourceforge.net/forum/message.php?msg_id=3655037

By: rfrps

IA’m trying to custom the ListitemRenderer without success.
3 28/03/2006 10:44:47 com.potix.zk.ui.sys.UiEngineImpl handleError:472
SEVERE: >>java.lang.ClassCastException: class java.lang.String cannot be converted to interface com.potix.zul.html.ListitemRenderer.
>>java.lang.InstantiationException: com.potix.zul.html.ListitemRenderer
>> at java.lang.Class.newInstance0(Unknown Source)
>> at java.lang.Class.newInstance(Unknown Source)
>> at com.potix.lang.Classes.coerce(Classes.java:1227)
>> at
>>com.potix.zk.ui.metainfo.InstanceDefinition$MemberInfo.<init>(Instance
>>Defi
nition.java:386)
>> at
>>com.potix.zk.ui.metainfo.InstanceDefinition$MemberInfo.<init>(Instance
>>Defi
nition.java:336)
>> at
>>com.potix.zk.ui.metainfo.InstanceDefinition.addMember(InstanceDefiniti
>>on.j
ava:165)
>> at com.potix.zk.ui.sys.AbstractParser.addAttribute(AbstractParser.java:365)
>> at com.potix.zk.ui.sys.AbstractParser.parse(AbstractParser.java:323)
>> at com.potix.zk.ui.sys.AbstractParser.parse(AbstractParser.java:223)
>> at com.potix.zk.ui.sys.AbstractParser.parse(AbstractParser.java:328)
>> at com.potix.zk.ui.sys.AbstractParser.parse(AbstractParser.java:198)
>> at com.potix.zk.ui.sys.AbstractParser.parse(AbstractParser.java:105)
>> at
>>com.potix.zk.ui.http.Definitions.getPageDefinitionDirectly(Definitions
>>.jav
a:89)
>> at
>>com.potix.zk.ui.http.Definitions.getPageDefinitionDirectly(Definitions
>>.jav
a:70)
>> at
>>com.potix.zk.ui.http.ServletExecution.getPageDefinitionDirectly(Servle
>>tExe
cution.java:175)
>> at
>>com.potix.zk.ui.sys.AbstractExecution.createComponentsDirectly(Abstrac
>>tExe
cution.java:193)
>> at com.potix.zk.ui.Executions.createComponentsDirectly(Executions.java:125)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
>> at java.lang.reflect.Method.invoke(Unknown Source)
>> at bsh.Reflect.invokeMethod(Unknown Source)
>> at bsh.Reflect.invokeStaticMethod(Unknown Source)
>> at bsh.Name.invokeMethod(Unknown Source)
>> at bsh.BSHMethodInvocation.eval(Unknown Source)
>> at bsh.BSHPrimaryExpression.eval(Unknown Source)
>> at bsh.BSHPrimaryExpression.eval(Unknown Source)
>> at bsh.BSHBlock.evalBlock(Unknown Source)
>> at bsh.BSHBlock.eval(Unknown Source)
>> at bsh.BshMethod.invokeImpl(Unknown Source)
>> at bsh.BshMethod.invoke(Unknown Source)
>> at bsh.BshMethod.invoke(Unknown Source)
>> at bsh.Name.invokeLocalMethod(Unknown Source)
>> at bsh.Name.invokeMethod(Unknown Source)
>> at bsh.BSHMethodInvocation.eval(Unknown Source)
>> at bsh.BSHPrimaryExpression.eval(Unknown Source)
>> at bsh.BSHPrimaryExpression.eval(Unknown Source)
>> at bsh.Interpreter.eval(Unknown Source)
>> at bsh.Interpreter.eval(Unknown Source)
>> at com.potix.zk.ui.sys.PageImpl.interpret(PageImpl.java:405)
>> at
>>com.potix.zk.ui.sys.EventProcessingThread.process0(EventProcessingThre
>>ad.j
ava:370)
>> at
>>com.potix.zk.ui.sys.EventProcessingThread.run(EventProcessingThread.ja
>>va:2
85)


Look my codes:

livedata.zul
<window title="Livedata Demo" border="normal">
<label id="show"/>
<zscript>
String[] data = new String[30];
for(int j=0; j < data.length; ++j) {
data[j] = "option "+j+" ["+j+"]";
}
ListModel strset = new SimpleListModel(data);
</zscript>
<listbox id="list" width="200px" rows="10" model="${strset}"
onSelect="show.value=self.selectedItem.value;"
itemRenderer="suportsys.zul.html.ValeuListitemRenderer">
<listhead>
<listheader label="Load on Demend"/>
</listhead>
</listbox>
</window>


ValueListitemRenderer.java
// ValueListitemRenderer.java

package suportsys.zul.html;

import com.potix.zul.html.*;

public class ValueListitemRenderer implements ListitemRenderer{

public void render(Listitem item, Object data) throws Exception {
String label = data.toString();
String value = label;
int start = label.indexOf("[");
if (start>2) {
int end = label.indexOf("]");
if (end>start) {
label = label.substring(start-1);
value = label.substring(start+1,end-start-1);
}
}
item.setLabel(label);
item.setValue(value);
}
}

when data.toString() == "California [CA]", then item.setLabel("California") and item.setValue("CA")

WhatA’s wrong?

Help me, please!