ListGrid: dynamic columns

[edulid]

Hello,

I am trying to make my listgrid columns based on user selection.
The listGrid's datasource is being (at the beginning) attached with DataSource.get("myDS");

When the user selects the columns to be shown, I call the method listGrid.setFields(field1, field2, ....).

It actually works, but when there are many columns (in my example 11 columns) the scrolling takes a lot of time.

When I start the "adminConsole.jsp", and I select the same datasource, it shows even more columns (16) and the scrolling is very smooth.

Whan am I doing wrong?

I am using firefox 3.6 and my js log is:

15:17:29.264:INFO:Log:initialized
15:17:29.590:WARN:AutoObserver:Use addInterfaceProperties() to add methods to interface [Class AutoObserver]
15:17:30.007:WARN:Log:New Class ID: 'IAutoFitButton' collides with ID of existing Class object '[Class IAutoFitButton]'. Existing object will be replaced.
15:17:30.007:WARN:Log:New Class ID: 'HeaderImgButton' collides with ID of existing Class object '[Class HeaderImgButton]'. Existing object will be replaced.
15:17:59.480:INFO:Log:isc.Page is loaded



I am testing from within eclipse, so I am not compiling the project.

I am using SmartGWT 2.4 EE.

Thank you for your help

My code: (the relevant method is setAdditionalComponentFields(ListGridField ... fields) )

import com.smartgwt.client.data.Criteria;
import com.smartgwt.client.data.DataSource;

import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.ListGridField;

public class SchuelerListGrid extends ListGrid {

	public static final String EMPTY_FIELD = "emptyField";
	public static final String EMPTY_FIELD_DISPLAY_NAME = " ";
	private DataSource ds = DataSource.get("schueler");
    private int attachedDataSourceFrom = -1;
    private boolean attachedDataSource = false;
    private ListGridField nameField;
    private ListGridField vornameField;
    private ListGridField gebDatumField;
    
	public SchuelerListGrid() {
		super();
		
		setLoadingDataMessage("${loadingImage} " +Zedes2.getConstants().loadingMessage());
		//setLoadingMessage(Zedes2.getConstants().loadingMessage());

		setShowAllRecords(false);
		setSortField(0);
		setAutoFetchData(false); 
		setCanEdit(false);
		setShowFilterEditor(true);  
		setFilterOnKeypress(true);  
		setFetchDelay(500);
		
		setComponentFields();
		setDataSource(ds);
		
  }
	
	private void setComponentFields() {
		nameField = new ListGridField("name", "Name");
		vornameField = new ListGridField("vorname", "Vorname");
		gebDatumField = new ListGridField("geb_datum", "Geb. Datum");
		setFields(nameField, vornameField, gebDatumField);
		
	}

	private void setSchultypCriteria(int schultyp) {
		
		Criteria n = new Criteria();
		n.setAttribute("schultyp",schultyp);
		
		fetchData(n);
	}
	
	public void setAdditionalComponentFields(ListGridField ... fields) {
		ListGridField[] f = new ListGridField[fields.length + 3]; //because of name, vorname, gebDatum
		f[0] = nameField;
		f[1] = vornameField;
		f[2] = gebDatumField;
		for (int i=3; i<= f.length-1; i++) {
			f[i] = fields[i-3];
		}
		setFields(f);
	}

	public void attachDataSource(int einrichtungID) {
		
        attachedDataSourceFrom = einrichtungID;
		setSchultypCriteria(einrichtungID);
		attachedDataSource = true;
       
	}
	
	
	public boolean getHasAttachedDataSourceFrom(int einrichtungID) {
		
		
		return einrichtungID == attachedDataSourceFrom;
	}
	
	
	public boolean hasAttachedDataSource() {
		return attachedDataSource;
	}
	public void attachDataSourceAll() {
		fetchData();
		attachedDataSource = true;
	}
	
}

[Isomorphic]

Hosted mode (aka Development mode), which is what you're using when you're not compiling, is quite a bit slower than compiled mode. End users will never experience the performance of hosted mode.

[edulid]

You are right. I just compiled the application and it's very fast!

Thanks!