Arrays, and Dataproviders

Right then my app made things difficult to enter data in a drop-down list item and I'm stuck so I would ask kindly for support.

The code that gets the info is:

var stLinkUrls:URLVariables = new URLVariables(evt.target.data);
dpp = stLinkUrls.stbbapi_links.split(",");

Code that is further down in the code that displays the drop-down list is the following:

var dp:DropDown= new DropDown();
dp.rowHeight = 45;
dp.rowCount=3;
dp.width = 250;
for(var i in dpp){
    dpp.push({label:"http://tncr.ws/"+i.toString()});
}
dp.dataProvider = new DataProvider(dpp);
addChild(dp);

The variables url gets its info from my server from a php page which has 2 variables "URL" you can see an example of the output of my php page if you like here: http://tncr.ws/example_beta5.php?apiv=110&key=23f452fae5943d0b5e059b3e5a71e097&s=http: / / www.nickdodd...

Hey nick,

Alrite so I got it to work. a few things that you need to change in your output from the Web server. to separate URLVariables, you will have to insert '&' between the two, a bit like a query string in your url in the browser bar. second thing you want to do is instead of use "\n" to separate your link ID and real URL, use the bar rather ' |. ' (just above the Enter key on most keyboards - might have to hit the shift). Here is a link to a page with the correct URLVariable string that you should be using my suggestions:

http://www.rabcore.com/workshop/PlayBook/variableTest.php

so after getting to look like that, to analyze you have to take a few steps. first of all, you need to obtain raw data first and then split with commas like you did. then you take that and further break down to separate your URL and link ID's then you add to the dataprovider and implemented. Here's some code that shows you how to do exactly that:

URLLoaderTest.as:

package{    import flash.display.Sprite;    import flash.display.StageAlign;    import flash.display.StageScaleMode;    import flash.events.Event;    import flash.net.URLLoader;    import flash.net.URLRequest;    import flash.net.URLVariables;

    import qnx.ui.data.DataProvider;    import qnx.ui.listClasses.DropDown;

    [SWF(width="1024", height="600", backgroundColor="#CCCCCC", frameRate="30")]    public class URLLoaderTest extends Sprite    {        /**         * make all variables accessible throughout the          * application         *          */

        private var loader:URLLoader;        private var request:URLRequest;

        private var dropDown:DropDown;        private var dpp:Array;        private var dataProvider:DataProvider;

        public function URLLoaderTest()        {            super();

            // support autoOrients            stage.align = StageAlign.TOP_LEFT;            stage.scaleMode = StageScaleMode.NO_SCALE;

            /**             *              * Use the loader class to load your URL with the correct              * URLVariable string             *              */

            request = new URLRequest("http://www.rabcore.com/workshop/playbook/variableTest.php");

            loader = new URLLoader();            loader.load(request);            loader.addEventListener(Event.COMPLETE, handleData);

        }        private function handleData(e:Event):void        {            var stLinkUrls:URLVariables = new URLVariables(e.target.data);

            /**             *              * First round of parsing the data retreived from the server             *              */

            var stLinkUrls_parsed:Array = stLinkUrls.stbbapi_links.split(",");

            /**             * Now that have an array of URL with their link ID's             * we pass it to the to the setupDropDown() method             *              */

            setupDropDown(stLinkUrls_parsed);

        }

        private function setupDropDown(arr:Array):void        {            dpp = new Array();

            /**             * Here is where the money is. you iterate through your             * array of links.             */

            for each (var linkData:String in arr)            {                /**                 *  now remember that they are in the [ID]|[link] format.                 *  so we have to further seperate it to keep the ID and                  *  link seperate. we then store it in a new object that                  *  we can just push into the drop down array.                 *                  */                var linkDataObj:Object = new Object();

                /** split the links at the "|" */                var linkDataArray:Array = linkData.split("|");

                /**                 * since the ID is first and the URL is second in the split,                 * we can just append http://tncr.ws/ to the beginning                  * and save the actual url to the "url" portion of the                  * object we are adding                 *                  */

                linkDataObj.label = "http://tncr.ws/" + linkDataArray[0];                linkDataObj.url = linkDataArray[1];

                /** push it into the drop down array */

                dpp.push(linkDataObj);            }

            /** now we just set the drop down up */

            dataProvider = new DataProvider(dpp);

            dropDown = new DropDown();            dropDown.dataProvider = dataProvider;            dropDown.width = 400;            dropDown.rowCount = 5;            dropDown.setPosition(10,10);

            addChild(dropDown);

        }    }}

I left comments throughout that should walk you through it. hope that sheds some light on the issue. Good luck!

EDIT: corrected the code to reflect your original display code.

Tags: BlackBerry Developers

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