Sorry, Elton, not NIls. I answered so many questions that I got confused
about who I was answering. :-)
On Thu, Jul 1, 2010 at 8:24 AM, Larry Becker <becker.la...@gmail.com> wrote:
> Hi Nils,
>
> I believe you might be running into problems updating because your loop
> is blocking the GUI thread. You might try a LayerViewPanel.repaint() using
> invokeAndWait().
>
> Larry
>
>
> On Thu, Jul 1, 2010 at 6:42 AM, Elton Chan <elton.c...@yahoo.com> wrote:
>
>> Hi there,
>>
>> I would like to refresh a layer after changing attribute of each feature
>> in the layer based on an event table. The event table records attribute
>> assigned to each feature at specified stage. Following is the schema of the
>> event table:
>>
>> Event(
>> StageID int, // StageID defines sequence of the event
>> Feature01 int, // value to be assigned to feature 01
>> Feature02 int, // value to be assigned to feature 02
>> ...
>> Feature10 int)
>>
>> Based on the StageID sequence, values for each feature would be retrieved
>> and updated to corresponding feature. Finally, update value would be
>> visualized by unique colortheming. However, it seems the layer refreshing
>> can only be effective outside the ResultSet loop of the event table.
>>
>> The following is the program codes:
>>
>> Inside execute(PlugInContext context)
>> // get a layer
>> lyr = context.getLayerManager().getLayer("postgis");
>> //create a Resultset RS
>> ResultSet RS stat.executeQuery("select * from Event");
>> while (RS.next())
>> {
>> updatePostgisLayer(lyr, RS);//This function updates feature in the layer
>> }
>> < layer refreshes after the looping all the resultset.
>>
>> My question is how to refresh the layer once attribute values are updated
>> for each each row of the RecordSet, i.e. immediately after the
>> updatePostgisLayer function.
>>
>> If I change the query to retrieve specify row (i.e. single row only),
>> layer can be refreshed. But it requires to activate it manually for each
>> update.
>>
>> I tried to add lyr.fireLayerChanged(LayerEventType.APPEARANCE_CHANGED);
>> or lyr.fireAppearanceChanged() after the updatePostgisLayer function but
>> it didn't work.
>>
>> Anyone can help?
>>
>> thanks,
>> Elton
>>
>>
>>
>>
>>
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