Announcement

**Isomorphic** · 10 Feb 2012, 16:44

SelectItems do not fully support having their optionDataSource modified at runtime like this.
The easiest way to implement this pattern is probably to use separate selectItems for each optionDataSource (and defining the optionDataSource, displayField, valueField and defaultToFirstOption properties when the item is first created). You can implement this in your app by
- either lazily creating them and using 'form.setItems()' to update the form at runtime,
- or if you're dealing with a small number like this, having both defined and present in the form but show() / hide() ing the appropriate item depending on which dataSource you're intested in.

**Vinod.Narayankar** · 23 Feb 2012, 01:51

Now i am using DSCallback methiod to retreive the list and bind it.
The code is working fine. but i am not able set default selection in combobox.

I tried with "selectItem.setDefaultToFirstOption(true) ".

Iid not find any luck.

Please find one the method which i am using. I also attached detailed code.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
public void getMonths(Record[] recordDR,String selectedDateRangeType ,SelectItem selectItem,String selectedYear)
{
selectItem.clearValue();
LinkedHashMap<String, String> monthList = new LinkedHashMap<String, String>();
int cnt = 0; boolean flag= true;
String StrColumn = null;
if(selectedDateRangeType.equalsIgnoreCase("Monthly"))
StrColumn ="MONTH_SHORT_NAME";
if(selectedDateRangeType.equalsIgnoreCase("Quartely"))
StrColumn ="QU_QUARTER_SHORT_NAME";//"QU_QUARTER_SHORT_NAME";
if(selectedDateRangeType.equalsIgnoreCase("Yearly"))
StrColumn="QU_QUARTER_SHORT_NAME";
String strTemp = null;
for (Record i : recordDR)
{
if(flag)
cnt++;
String b = i.getAttributeAsString("YEAR_NUM");
if(b.equalsIgnoreCase(selectedYear))
{
monthList.put(i.getAttribute(StrColumn),i.getAttributeAsString(StrColumn));
flag= false;
}
}
selectItem.setValueMap( monthList);
// if(recordDR.length>0)
// selectItem.setValue( recordDR[cnt-1].getAttributeAsString(StrColumn));
selectItem.setDefaultToFirstOption(true);
}

Attached Files

MarketIntelligence.java (8.1 KB, 154 views)

**Isomorphic** · 23 Feb 2012, 10:58

We can't run your test case exactly as written since we don't have your dataSources but the basic issue appears to be that you're clearing the value before you apply the new valueMap.

clearValue() will cause the item to reset to the default. If defaultToFirstOption is true, that default will be the first item in the valueMap.

Here's a simple example with no dataSources demonstrating this.

Code:

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.SelectItem;
import com.smartgwt.client.widgets.form.fields.events.ChangedEvent;
import com.smartgwt.client.widgets.form.fields.events.ChangedHandler;

public class DefaultToFirstOption implements EntryPoint {

    @Override
    public void onModuleLoad() {
        
        DynamicForm form = new DynamicForm();
        
        SelectItem masterItem = new SelectItem("master");
        masterItem.setValueMap("List 1", "List 2", "List 3");
        
        final SelectItem dependentItem = new SelectItem("dependent");
        // Only have to set this once
        dependentItem.setDefaultToFirstOption(true);
        
        masterItem.addChangedHandler(new ChangedHandler() {
            
            @Override
            public void onChanged(ChangedEvent event) {
                if (event.getValue() == null) return;
                String value = (String)event.getValue();
                
                String[] valueMap;
                if (value.equals("List 1")) {
                    valueMap = list1;
                } else if (value.equals("List 2")) {
                    valueMap = list2;
                } else {
                    valueMap = list3;
                }
                
                // setValueMap
                dependentItem.setValueMap(valueMap);
                // clear value so it resets to default (first option)
                dependentItem.clearValue();
            }
        });
        
        form.setItems(masterItem, dependentItem);
        form.draw();
        
        
    }
    private String[] list1 = new String[] {
            "Option 11",
            "Option 12",
            "Option 13"
    };

    private String[] list2 = new String[] {
            "Option 21",
            "Option 22",
            "Option 23"
    };
    private String[] list3 = new String[] {
            "Option 31",
            "Option 32",
            "Option 33"
    };
}

**vinodnarayankar** · 23 Feb 2012, 17:46

Ok, thanks for the reply. ClearValue() works.

Thanks
Ps:I send you the code so that you can walk through the code. Apologies for not sending with datasource. Thanks for the help on this..

**vinodnarayankar** · 24 Feb 2012, 09:21

SelectItem MonthItem = new SelectItem ();
LinkedHashMap<String, String> monthList = new LinkedHashMap<String, String>();
monthList.put("1234","Jan");
monthList.put("1235","Feb");
monthList.put("1236","Mar");
monthList.put("1237","Apr");

monthItem.setValueMap( monthList);

In combobox i will see Jan,Feb,MarApr. when use selects Jan, i would like to read 1234 which is value id jan month. Same for FEb.

What property shall i use to read the key of the combo box? at present i am using reportParams.getValueAsString("monthItem") and its returning Jan, but i want 1234. what shall i do? which property shall i use?

**vinodnarayankar** · 29 Feb 2012, 04:11

Any update on below issue

**Isomorphic** · 29 Feb 2012, 11:00

Is there something wrong with just getValue()?

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Combobox selection issue

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