Thanks,
That is much simpler!
For the ExpressionTableColumn I need a ExpressionEvaluator as the last
parameter. I think it is a tapestry service (still digging through the binding
files), thought this would work:
@InjectObject("infrastructure:tapestry.ognl.ExpressionEvaluator")
public abstract ExpressionEvaluator getExpressionEvaluator();
(also tried engine-service)
However I get a nice exception that it can't find the service etc.
-Ryan
On Wednesday, August 16, 2006, at 07:10AM, Robert Zeigler <[EMAIL PROTECTED]>
wrote:
>If you want, you don't even have to implement ITableColumnModel.
>just do something like:
>.html:
><table jwcid="@contrib:Table" source="ognl:theSource"
>columns="ognl:columnList"/>
>
>.java:
>
>public List getColumnList() {
> List ret = new ArrayList();
> String columnId="callPointH";
> String columnHeader="Call Point H";
> //not that the root of your ognl expression is the current row obj.
> String ognlExpression = "callPoinH";
> boolean sortable=true;
> ret.add(new
>ExpressionTableColumn(columnId,columnHeeader,ognlExpression,sortable);
> return ret;
>}
>
>Ryan Cuprak wrote:
>> Hello,
>> I am working creating a table for which the number of columns is dynamic
>> (user can control which columns they want displayed). What is the proper
>> approach for implementing the behavior?
>>
>> Thus far I created an implementation of ITableColumnModel which then
>> returns the custom set of columns. I initially returned SimpleTableColumn
>> instances but was getting a 'Unable to read OGNL expression '<parsed OGNL
>> expression>' of [EMAIL PROTECTED]/image/bands.tableColumns]:
>> tableColumnRenderer' exception (src below). After getting this exception I
>> thought my approach might be wrong. Looking over the code I was a little
>> puzzled on how my column would extract the values from the model etc.
>> Looking through the contrib:table source I chanced upon
>> 'ExpressionTableColumn'. There are no java docs so I am not quiet sure how
>> it is supposed to be used. From the title I 'think' this would take ognl
>> expressions and retrieve the values from my data model? However, I am not
>> quiet sure how to contruct an instance - where/what do I use for an
>> ExpressionEvaluator?
>>
>> Page spec:
>> <component id="bands" type="Contrib:Table">
>> <binding name="source" value="tableModel"/>
>> <binding name="columns" value="ognl:tableColumnModel"/>
>> <binding name="rowsClass" value="beans.evenOdd.next"/>
>> <binding name="columnsClass" value="literal:title"/>
>> </component>
>>
>> My TableColumnModel (only one field, was trying to get it working first..):
>> public class BandSummaryColumnModel implements ITableColumnModel {
>>
>> private static final Logger logger =
>> Logger.getLogger(BandSummaryColumnModel.class);
>>
>> private Map<String, ITableColumn> _columns;
>>
>> public BandSummaryColumnModel() {
>> if(logger.isDebugEnabled()) logger.debug("Instantiating
>> BandSummaryColumnModel");
>> _columns = new HashMap<String,ITableColumn>();
>> _columns.put("callPointH",new
>> SimpleTableColumn("callPointH","callPointH",true));
>> }
>>
>> public int getColumnCount() {
>> if(logger.isDebugEnabled()) logger.debug("Column count: " +
>> _columns.size());
>> return _columns.size();
>> }
>>
>> public ITableColumn getColumn(String string) {
>> if(logger.isDebugEnabled()) logger.debug("Column requested: " +
>> string);
>> return _columns.get(string);
>> }
>>
>> public Iterator getColumns() {
>> if(logger.isDebugEnabled()) logger.debug("Column iterator
>> requested");
>> return _columns.entrySet().iterator();
>> }
>> }
>>
>> Thanks!
>> Ryan
>>
>>
>>
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