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author's profile photo Former Member
Former Member

bindSelectedKey Question

I have the below context structure and am trying to create DropDown UI objects and lists dynmically. Further below is the code I have

thus far; most of it taken from the example. I think I understand what is happening up to this point however I don't undstand

what to pass to the bindSelectedKey to get the "response_text" shown in the picklist but have the "response_value" stored as the

selected option.

Any help would be much appreciated.


C_Quest_Resp (0..n, s=true)
 - question_text
 - ...
 - ...
 + Responses (0..n, s=true)
    - response_text
    - response_value	
    - ...

// Multiple questions each having an element (Responses) which contains list of applicable responses.

 if (firstTime) {
		IC_quest_respElement qNode;
		int noQuestions = wdContext.nodeC_quest_resp().size();
		for ( int i = 0; i < noQuestions; i++ ) {
			qNode = wdContext.nodeC_quest_resp().getC_quest_respElementAt(i);
			IWDDropDownByKey dropDown = (IWDDropDownByKey)view.createElement(IWDDropDownByKey.class,
			                                                                 "inp" + i );

			/** Trying to understand how I will handling binding. **/											 
			// dropDown.bindSelectedKey()

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3 Answers

  • Best Answer
    author's profile photo Former Member
    Former Member
    Posted on May 31, 2007 at 08:07 AM


    1. Map the context attribute "response_text" to the bindSelectedKey property of DDBK.



    IWDAttributeInfo attributeInfo = wdContext.nodeResponses().getNodeInfo().getAttribute(IPrivate<view>.IResponsesElement.RESPONSE_TEXT);

    IWDDropDownByKey DDBK = (IWDDropDownByKey)view.createElement(IWDDropDownByKey.class,"DDBKsample");


    IWDTransparentContainer container = (IWDTransparentContainer)view.getRootElement();


    // now call the method of component controller to populate the data inside the DDBK



    //create a method in component controller say "populateDDBK"

    // use simple value set to populate the values in the DDBk with 'response_text' as the list value and

    // 'response_value' as the key of the selected 'response_text'

    public void populateDDBK()


    IWDAttributeInfo atrInfo = wdContext.nodeResponses().getNodeInfo().getAttribute(IPrivateTest_DDBK_View.IResponsesElement.RESPONSE_TEXT);

    IModifiableSimpleValueSet ValueSet = atrInfo.getModifiableSimpleType().getSVServices().getModifiableSimpleValueSet();

    for(int i = 0; i < wdContext.nodeResponses().size();i++)


    ValueSet.put(wdContext.nodeResponses().getResponsesElementAt(i).getresponse_value(), wdContext.nodeResponses().getResponsesElementAt(i).getresponse_text());



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  • author's profile photo Former Member
    Former Member
    Posted on May 30, 2007 at 11:13 PM

    I think you are on the wrong track.

    You want to display the list of possible responses for a question in a dropdown list, right?

    Change your context structure into something like this:

    Questions (node, card=0:N)
    - Text (attribute, string)
    - Responses (node, card=0:N, singleton=false)
    -- Text (attribute, string)

    Now, to create questions and responses, you can use code like:

    IQuestionsElement q1 = wdContext.createAndAddQuestionsElement();
    q1.setText("First question");
    IResponsesElement r11 = q1.nodeResponses().createAndAddResponsesElement();
    r11.setText("First response to first question");
    IResponsesElement r12 = q1.nodeResponses().createAndAddResponsesElement();
    r12.setText("Second response to first question");

    Now you can use a dropdown list for selecting a question and a second dropdown list for selecting a response by code like this (or better, create them in the IDE):

    IWDDropDownByIndex questionSelector = (IWDDropDownByIndex) view.createElement(IWDDropDownByIndex.class, "QuestionSelector");
    IWDDropDownByIndex responseSelector = (IWDDropDownByIndex) view.createElement(IWDDropDownByIndex.class, "ResponseSelector");

    Additionally, assign an action to the "onSelect" event of the question selector to trigger a server roundtrip when the selection changes. This leads to a change of the lead selection in node "Questions" which in turn leads to filling the second dropdown list with the responses for the selected question.


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  • author's profile photo Former Member
    Former Member
    Posted on May 31, 2007 at 01:41 PM

    Thank you both those were very helpful and exactly what I was looking for. I've awarded points to both.

    Thanks again!!!!!


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