Re: (FLEX-35197) [FlexJS] Data-binding is broken or not implemented in DataGrid component

[Peter Ent <pe...@adobe.com>]

There is no official schedule or roadmap of features. However, you are
welcome to contribute this additions and join the development of FlexJS.
We will be more than happy to guide you. You can start by doing the
development in your own workspace/project and once you have beads that do
what you want, migrate them to the framework projects.

Regards,
Peter

On 12/16/16, 12:33 AM, "Devsena (JIRA)" <ji...@apache.org> wrote:

>
>    [ 
>https://issues.apache.org/jira/browse/FLEX-35197?page=com.atlassian.jira.p
>lugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15753521#com
>ment-15753521 ] 
>
>Devsena commented on FLEX-35197:
>--------------------------------
>
>Do you think Apache can bring these requirement to their FlexJS roadmap,
>sooner?
>
>> [FlexJS] Data-binding is broken or not implemented in DataGrid component
>> ------------------------------------------------------------------------
>>
>>                 Key: FLEX-35197
>>                 URL: https://issues.apache.org/jira/browse/FLEX-35197
>>             Project: Apache Flex
>>          Issue Type: Question
>>    Affects Versions: Apache FlexJS 0.8.0
>>            Reporter: Devsena
>>            Assignee: Peter Ent
>>         Attachments: src.zip
>>
>>
>> (I've took the _DataGrid_ example that supplied within the nightly
>>build of 0.8.0 FlexJS SDK bundle, and I tried all my tests in that
>>project only)
>> h3.Requirement
>> Binding is a strong feature in Flex technology. As an user I also do
>>expect that FlexJS will also empowers us with the same strength
>>developing projects. While testing _DataGrid_ example that supplies
>>within SDK bundle, I noticed that pay-as-you-go view only available but
>>no actual run-time data binding (as far I tested); which is the strength
>>that I was talking about. Is run-time data-binding (by any _beads_ or
>>any other way) to DataGrid component is at all available yet?
>> In the following tests I tried to update one row object's (_Product_)
>>one particular field (_image_) value, to see it's change in row
>>renderer, at run-time.
>> I also tried to add or delete an item to it's _dataProvider_ collection
>>to see their changes in DataGrid UI.
>> h3.Actual Result
>> Run-time data update to collection list not affecting to DataGrid UI.
>> h3.How I Tested
>> I've attached the source ZIP that supplied within SDK bundle and I
>>modified few codes to test my requirement.
>> The example consists of a DataGrid, and few buttons as follows:
>> - Replace Array - replace the entire model with a new Array
>> - Update Entry - Update the image for the first entry
>> - Add Entry - Add a new entry to the end of the list
>> - Remove Entry - Remove the first entry
>> - Refresh - this recreates the array and saves it to the model. This
>>forces the DataGrid to update by the same method as Replace Array
>> "Replace Array" and "Refresh" worked fine. "Refresh" is a possible
>>workaround for data update to grid UI, but it is inefficient for a real
>>application. The other buttons did not cause DataGrid UI to update. The
>>places which I've changed as follows.
>> *Product.as*
>> {code}
>> // since I was trying to update one field at least to DataGrid UI, I
>>added get/set methods to the _image_ field
>> private var _image:String;
>> [Bindable(event="imageChanged")]
>> public function get image():String
>> {
>> 	return _image;
>> }
>> 		
>> public function set image(value:String):void
>> {
>> 	if (value != _image)
>> 	{
>> 		_image = value;
>> 		dispatchEvent(new Event("imageChanged"));
>> 	}
>> }
>> {code}
>> *MyInitialView.mxml*
>> {code}
>> // Replacing or recreating the collection list
>> private function replaceArray():void
>> {	
>> 	// Only this part worked when SimpleBinding used rather than
>>ConstantBinding
>> 	ProductsModel(applicationModel).productList = new ArrayList([new
>>Product("ps220","Weejets",35,190,"assets/smallorangerect.jpg")]);
>> 				
>> 	writeStatus();
>> }
>> // Update an entry to the collection
>> private function updateEntry():void
>> {
>> 	// This part not working or updating to DataGrid UI either
>> 	/*ProductsModel(applicationModel).productList.source[1] = tmp;
>> 	ProductsModel(applicationModel).dispatchEvent(new
>>Event("propertyChange"));*/
>> 	// This part not working or updating to DataGrid UI
>> 	var tmp:Product =
>>ProductsModel(applicationModel).productList.getItemAt(0) as Product;
>> 	tmp.image = "Modified Text";
>> 				
>> 	writeStatus();				
>> }
>> // Adding an item to the collection list
>> private function addEntry():void
>> {
>> 	// Add a new entry to the list
>> 	idCounter++;
>> 	ProductsModel(applicationModel).productList.addItem(new
>>Product("product" + idCounter, "Added" + idCounter, 35, 190,
>>"assets/smallorangerect.jpg"));
>> 				
>> 	writeStatus();
>> }
>> // Removing an item from the collection list
>> private function removeEntry():void
>> {
>> 	// remove the first item
>> 	ProductsModel(applicationModel).productList.removeItemAt(0);
>> 				
>> 	writeStatus();
>> }
>> // Refreshing the collection to datagrid
>> private function refresh():void
>> {
>> 	// force an update setting the model to the same value it already has.
>> See replaceArray()
>> 				
>> 	// this was insufficient to trigger the update:
>> 	// ProductsModel(applicationModel).productList =
>>ProductsModel(applicationModel).productList;
>> 				
>> 	// Since there was NO refresh logic to ArrayList or DataGrid
>>component, we only do a brute refresh to the list
>> 	var oldArray:ArrayList = ProductsModel(applicationModel).productList;
>> 	var newArray:ArrayList = new ArrayList();
>> 	var index:int;
>> 	for (index = 0; index < oldArray.length; index++) {
>> 		newArray.addItem(oldArray.getItemAt(index));
>> 	}
>> 				
>> 	ProductsModel(applicationModel).productList = newArray;
>> 	writeStatus();
>> }
>> ...
>> // DataGrid ConstantBinding bead replaced with SimpleBinding
>> <js:DataGrid id="dataGrid" x="20" y="30" width="400" height="300"
>>change="dataGridChange()" rowHeight="30">
>> 		<js:beads>
>> 			<js:SimpleBinding sourceID="applicationModel"
>> 							  sourcePropertyName="productList"
>>destinationPropertyName="dataProvider" eventName="propertyChange"/>
>> ...
>> {code}
>> I also created a new MXML based _DataItemRenderer_ component to see if
>>binding is working anyway: *ProductItemRendererMXML.mxml*; But it didn't
>>worked either. 
>> I discussed this at dev mailing-list
>>(http://apache-flex-development.2333347.n4.nabble.com/Why-same-files-exis
>>ts-in-multiple-places-td56983.html) where Alex suggested that a chain of
>>specific beads usage may help this feature, but he wasn't sure if such
>>beads already developed or not.
>> Is there any such beads or procedure already available, or,
>>in-development? 
>
>
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