Flex :: Source In ArrayCollection And XMLListCollection?
Aug 29, 2011
What is the role of source for an ArrayCollection or XMLListCollection? Is it used just once - when constructing a new ArrayCollection or XMLListCollection object and is it copied to some internal data structure of that object?
Because nothing is updated when the source Array (or XMLList) is being modified and the documentation confirms it too: The underlying XMLList for this collection. The XMLListCollection object does not represent any changes that you make directly to the source XMLList object. Always use the XMLListCollection methods to modify the collection.
This property can be used as the source for data binding. When this property is modified, it dispatches the listChanged event.
I'm asking because Flex examples related to dataProviders always use some Array or XMLList as source of data for a data-driven component. And I wonder, if using Array or XMLList is necessary at all - when for example loading data from external PHP-script.
Is there anyway of type casting an ArrayCollection to xmllistcollection or to xmllist or can we covert ArrayCollection to xmllistcollection or to xmllist?
i am currently working on a datagrid, where i get the dataprovider as an arraycollection...now, i have to click a button to delete an item from the populated datagrid..but i want to also automatically delete this item from the xml document as well. as such , i would need to pass in xmllistcollection as the dataprovider but i do not know how to convert my arraycollection to xmllistcollection..
I have a component where I expose the property 'questions' with the following code:
private var _questions:ArrayCollection; private var questionsChanged:Boolean; [Bindable("questionsChanged")]
[Code]....
In this component, I use commitProperties() to implement my logic.
I use Cairngorm and the 'questions' is in the model and hence it's defined as a source for data binding.
When the 'questions' ArrayCollection's size changes elsewhere in the application, it is not invoking the setter method in the component that is destination for the data binding.
I'm new to Flex and am using TileList bound to an ArrayCollection. The array collection is empty at load time, and then updates with the results from am HTTPService call. The problem is that the item renderers aren't being rendered as expected, I'm guessing because there was no data when they were first rendered at load time. Here's simplified example:
I have a MenuBar, which is using a XMLListCollection object as a dataProvider.I wish to add and remove elements from this collection at runtime.How to add / remove elements from XMLListCollection ?
When the XMLListCollection is updated in the DataGrid, I want it to add the XML (bind it) into the Model. How would I do this? Or if not possible, how would I manually add XML into the Model?
This is a rough example of what I'm trying to do. Adding data to the DataGrid works fine; it just doesn't go into the Model when sending to the HTTPService.
I am trying to display content of xmllistcollection in different fields in my datagrid however unless I use an itemrenderer the value is not displaying in the grid. The xmllistcollection is populated from a webservice call. Inside my item renderer i use a custom namesspace to retrieve contents from the xmllistcollection value.ns::firstName However if I try something like dataField = "ns::firstName" In the datagrid without using an item renderer I get no data output.
i have a Air Project in which i have added three extenal source folders. but when i reopen project or strat flash builder again i get icon on those folder like this but when i open the configuration for that project and try to validate the path and adding it again i get message like this but the path is valid. proof is this pic what could be possible error,,, is there any way that i when ever re-open project i get no warning and able to navigate through the linked source code. now i am doing it
Whenever the trace function runs in init(), the property menuItems returns null. I don't seem to have this problem with other variable types, like Boolean or String. Is this due to the size of the XMLListCollection object? How can I set up this SubNavBar custom component with XMLListCollection property and bind it to a control in the component?
(I'm using Cairngorm)I have a combobox that displays items form an XMLListCollection that's in my model.I want to only view the items (XML) whose "sent" properties is false.. like item.sent == 'false'.This filter must apply only to this specific combobox, not everything that's bound to the XMLListCollection source.And of course it must update and refresh the filter if the source changes..I'm trying to use filterFunction but don't understand how it works...
So inside my src folder I have my app.mxml file. I have a source directory pointed to my actionscript library.It appears that Flex does not look inside that source directory including an .as file within the master mxml file.
I could just have the main app.as file inside the src folder along with my app.mxml file but it would be nice if it could live in the actionscript library.
So inside my src folder I have my app.mxml file. I have a source directory pointed to my actionscript library.It appears that Flex does not look inside that source directory including an .as file within the master mxml file.[code]I could just have the main app.as file inside the src folder along with my app.mxml file but it would be nice if it could live in the actionscript library.
I have a advanced datagrid and populating some data by using arraycollection. And i am filtering the arraycollection, the arraycollection index got changed.
i have a problem using the itemRenderer functionality. When using an ArrayCollection the visible Data in the DataGrid using the itemRenderer will be rendered just fine. But if i start scrolling the entries are repeating in the cells using the renderer. The cells are not filled with date according to the id. What mistake i'm doing here.
I read a lot of the explainations like:
[URL]
here is the code for the set data function (itemRenderer is extending HBox):
override public function set data(value:Object):void { _data = value; if(data!=null)
the applicable differences between an ArrayCollection and a Vector in flex? I'm unsure if I should be using one over the other. I saw that Vector is type safe and that makes me feel better, but are there disadvantages?
public var ac:ArrayCollection = new ArrayCollection(); versus public var vec:Vector.<String> = new Vector.<String>();
In Flex, it's easy to convert the XML to Object and to ArrayCollection by using var decoder:SimpleXMLDecoder = new SimpleXMLDecoder(); decoder.decodeXML( xml );
But is there a good way to convert ArrayCollection to XML.
I currently have an arrayCollection in Flex and I want to sent it to PHP (Zend_AMF). According to the Zend_AMF wiki, sending an arrayCollection over directly will force Zend_AMF to cast the arrayCollection as an object which is no good. I'd rather have an array of my models. I assume the best way would be to convert the arrayCollection to an array in flex and then send it over. Is this true, and if so how would I do that in Flex 3? If you have a better recommendation,
Is there any way in Flex where in we can sort an arraycollection based on strings .I have a dataprovider with strings like "Critical" "High" "Medium" "Low" where in I need to sort it in such a way that I need Critical to be displayed on the top and next High , Medium and Low follows.
I would like to create a new AC instance with a dynamic variable which is nca1, nca2, etc. Without define using hardcode variable name, it is possible to do that in a loop?
I am creating a RSS Feed application based on a data, and I have the following:
I have an ArrayCollection that is pre-populated with data. I am sorting through the ArrayCollection, get 1 piece of data (condition), and need to connect to an RSS feed which returns me the title, and I set my ArrayCollection in correspondence to condition -> title.
public function updateArrayList(list:ArrayCollection):ArrayCollection { trace(list); for(var i:int = 0; i < list.length; i++) { //Alert.show(list.getItemAt(i).condition);
