Thank you very much!! I got it working. What I'm not understanding
though is, why the DataSource ds doesn't have any problem with being
handled outside of the callback. I would greatly appreciate it if you
could explain this to me.. Thanks!!
P.S I used to have do the exact same with the dataString using another
class to call the RPC and assigning it to a class variable similar to
here and then instantiating the class in the EntryPoint class exactly
as i have done for the DataSource. DataSource works but not
designStrings.
Thank you in advance :)
On Jul 8, 10:34 pm, Sean <slough...@gmail.com> wrote:
> You're running into an async problem.
>
> The call back happens asynchronusly, meaning, just because you kick
> off the RPC service does not mean that designStrings will have a value
> in it before you execute the code after you kick off the RPC.
>
> Get rid of anything that uses designStrings outside of the callback or
> loadDesigns. Looking over your code quickly, what you want to do is in
> loadDesign, iterate through result and put it into your Combo Box.
>
> On Jul 8, 3:31 am, npradeeptha <nipuna.ro...@gmail.com> wrote:
>
>
>
> > Heres my code.. I'm using GWT 2.0.3 with smartGWT 2.2. I think this is
> > a GWT related question..
>
> > [CODE]
> > /**
> > *
> > */
> > package org.gwt.venus.client;
>
> > import com.google.gwt.core.client.EntryPoint;
> > import com.google.gwt.user.client.rpc.AsyncCallback;
> > import com.google.gwt.user.client.ui.RootPanel;
>
> > /**
> > * @author npradeeptha
> > *
> > */
> > import com.smartgwt.client.data.DataSource;
> > import com.smartgwt.client.data.DateRange;
> > import com.smartgwt.client.data.RelativeDate;
> > import com.smartgwt.client.widgets.form.DynamicForm;
> > import com.smartgwt.client.widgets.form.fields.ComboBoxItem;
> > import com.smartgwt.client.widgets.form.fields.DateRangeItem;
> > import com.smartgwt.client.widgets.grid.ListGrid;
> > import com.smartgwt.client.widgets.grid.ListGridField;
> > import com.smartgwt.client.widgets.layout.HLayout;
> > import com.smartgwt.client.widgets.layout.VLayout;
>
> > public class VenusData implements EntryPoint {
>
> > /* (non-Javadoc)
> > * @see com.google.gwt.core.client.EntryPoint#onModuleLoad()
> > */
> > VenusDataSource vds = new VenusDataSource();
> > private RpcCallServiceAsync rpc = RpcInit.initRpc();
> > String[] designstrings = null;
>
> > @Override
> > public void onModuleLoad() {
> > // TODO Auto-generated method stub
> > initializeDesignsArray();
> > DataSource ds = vds.getDs();
>
> > VLayout layout = new VLayout(8);
>
> > HLayout searchFields = new HLayout();
> > searchFields.setBackgroundColor("Cyan");
>
> > DynamicForm searchForm = new DynamicForm();
> > ComboBoxItem cmbDesigns = new ComboBoxItem("cmbDesigns", "Design");
> > ComboBoxItem cmbCriteria = new ComboBoxItem("cmbCriteria",
> > "Criteria");
> > cmbDesigns.setWidth("*");
> > cmbCriteria.setWidth("*");
> > cmbDesigns.setType("comboBox");
>
> > //cmbDesigns.setValueMap(designstrings);
> > cmbCriteria.setValueMap("FAST","HARSHA_FAST","NIJ_1");
>
> > // Inline FilterEditor Example (MiniDateRangeItem)
>
> > final DateRangeItem rangeItem = new DateRangeItem("Date");
> > rangeItem.setWidth("*");
> > rangeItem.setShowTitle(false);
> > rangeItem.setAllowRelativeDates(true);
>
> > DateRange dateRange = new DateRange();
> > dateRange.setRelativeStartDate(new RelativeDate("m"));
> > dateRange.setRelativeEndDate(new RelativeDate("m"));
> > rangeItem.setValue(dateRange);
>
> > searchForm.setNumCols(6);
> > searchForm.setFields(cmbDesigns,cmbCriteria, rangeItem);
> > searchFields.addMember(searchForm);
>
> > // Create a ListGrid displaying data from the worldDS and also
> > displaying a FilterEditor
> > final ListGrid dataGrid = new ListGrid();
> > dataGrid.setWidth(655);
> > dataGrid.setHeight(240);
> > searchFields.setWidth(650);
>
> > ListGridField builds = new ListGridField("build", "Build");
> > builds.setWidth(130);
> > ListGridField criteria = new ListGridField("criteria",
> > "Criteria");
> > ListGridField design = new ListGridField("design", "Design");
> > ListGridField lut = new ListGridField("lut", "LUT");
> > ListGridField date = new ListGridField("date", "Date");
> > ListGridField lut4 = new ListGridField("lut4", "Eq LUT4");
> > ListGridField ble = new ListGridField("ble", "BLE FFs");
> > ListGridField slack = new ListGridField("slack", "Slack");
>
> > dataGrid.setFields(builds,criteria,design,date,slack,lut,lut4,ble);
>
> > dataGrid.setDataSource(ds);
> > dataGrid.setAutoFetchData(true);
> > System.out.println(designstrings.length); //*** Gives a null
> > pointer error.
> > cmbDesigns.setValueMap(designstrings); //does not set any values
> > since designstrings is null.
>
> > layout.addMember(searchFields);
> > layout.addMember(dataGrid);
>
> > layout.draw();
> > RootPanel.get("content").add(layout);
>
> > }
>
> > public void initializeDesignsArray(){
> > rpc.getDesign(new AsyncCallback<Design[]>() {
>
> > @Override
> > public void onFailure(Throwable caught) {
> > System.out.println("Design callback
> > failed");
>
> > }
>
> > @Override
> > public void onSuccess(Design[] result) {
> > //System.out.println(result.length);
> > String[] designs = new
> > String[result.length];
>
> > for(int i=0; i<designs.length; i++){
>
> > designs[i] = result[i].design;
> > System.out.println(designs[i]); //
> > Prints the items so the
> > callback works and gets data..
>
> > }
> > loadDesigns(designs);
>
> > }
> > });
> > }
>
> > public void loadDesigns(String[] result) {
> > designstrings = result;
> > System.out.println(designstrings.length); //works too
>
> > }
>
> > }
>
> > [/CODE]
>
> > I have commented on the code where it works and goes wrong.. The
> > CallBack works perfectly but the variable is always null. Please
> > explain whats going on. Thanks!!
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