Actionscript 3 :: Data Binding Object Converted To ArrayCollection
Jun 23, 2011
I have a somewhat complex parent/child hierarchy object that I need to display in a tree format that dynamically updates. To pass it into the tree as a dataprovider I convert the top level parent into an Array and then into an ArrayCollection. The problem there is if anything changes in the hierarchy the tree isn't dynamically updated unless I regenerate the dataprovider.
EDIT: I didn't have much code shown so I just tried to include the skeleton version of how everything is being used below, the tree works fine and even when I remove/add nodes the changes are evident but the vertical scroll bar isn't updated(doesn't resize) and if I scroll the tree will get out of whack and may display whitespace at the bottom of the tree where the item was just removed.
I tried just a plain bindable ArrayCollection test object with multiple levels and it updates properly so I think my tree is fine it's just how I'm trying to bind the dataprovider that I'm having the issues.
AS3 Class 1 - Object that can have plenty of child objects of itself by calling insertCustomObject()
public function CustomObject() {
}
public function insertCustomObject(customObject : CustomObject) : void {
[Code].....
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Apr 15, 2010
I have a datagrid that gets its data from a webservice.When data from the webservice is retrived it calls the following function:
private function onListReg():void
{
arrRegOld = WSAutoreg.list.lastResult as ArrayCollection;
arrReg = WSAutoreg.list.lastResult as ArrayCollection;
[code].....
The intent is when I hit a update button, it compares arrRegOld with arrReg and see if any values have changes. The problem is whenever I change values on the Datagrid it changes on both the dataProvider and on both ArrayCollections.What should I do so that the binding applies only to one ArrayCollection?
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May 23, 2010
I am using flex SDK 3.5. I have model.as and in it i have an ArrayCollection (name it arr_mod) which is Bindable.
From my mxml i link to this arr_mod in three places:
1) in DataGrid i set dataprovider={arr_mode} ...
2) in Button i add new item to the arr_mod this way: mx:Button .. click = "{arr_mod.addItem(new Item)}"
3) in textBox i want to add mx:TextBox text="{mySpecialCounterFunc(arr_mod)}"
note that in the Script of mxml arr_mod is Bindable as well as in the class definition in model.as
The problem is, that when clicking on button, mySpecialCounterFunc is not called! it should be called, since i use {} and this should listen to changes in arr_mod (a change that was made in the button should cause a new item to be added.. and than the listener to respond). While The DataGrid is updated correctly! By the way, if i change arr_mod to simple String or Int it works.. i.e. mySpecialCounterFunc is called Why??
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Jun 29, 2010
I am trying to bind an ArrayCollection result coming in from the server to my DataGrid
created dynamically in AS. The result data is not getting Displayed in the Grid.
var dg:DataGrid = new DataGrid();
dg.width=650;
dg.dataProvider=someArrayCollfromServer;
I am adding the dgColumn as runtime based on some data from a XML and it is the same as defined in below static format. But if I use the same code and create the DataGrid as a Flex Component as below, it works fine.
<mx:DataGrid id="dg" width="100%" height="100%" dataProvider="{someArrayCollfromServer}">
<mx:columns>
<mx:DataGridColumn dataField="Value" headerText="Value"/>
<mx:DataGridColumn dataField="Code" headerText="Code" />
</mx:columns>
</mx:DataGrid>
This works fine. Is there some functionality or implementation different as far as DataGrid is concerned in Flex and AS.
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Jan 19, 2011
I have an arrayCollection that is populating a chart. Can I bind the array items to vars that I can then modify?
private var ratingAC:ArrayCollection = new ArrayCollection([
{ Rating: 10 }, // [0] positive
{ Rating: 20 }, // [1] neutral
{ Rating: 60 } // [2] negative
[code]....
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Jul 26, 2011
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<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
[code]......
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Jul 13, 2010
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May 14, 2011
linedataColl is an AC that contains 100+ of rows extract from CSV, I wish to add item into SuperDataCollection object by object but the only problem was I'm unable to see any data display in "S" which is a datagrid. What wrong with my code?
var superDataCollection:ArrayCollection = new ArrayCollection();
var dc:ArrayCollection = new ArrayCollection();
var di:Object = new Object();[code]......
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Nov 4, 2011
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Jan 2, 2011
I've tried a couple different hash classes for as3. Right now I'm using the com.adobe.crypto package from [URL] What I need is a way to return the raw data as opposed the the hex converted string, similar the the way python's hashlib functions have a digest() and hexdigest() method. In python the code would be
...
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In as3 using the following code returns a different hash because the return from the first hash is converted to hex before being hashed again.
...
SHA1.hash(SHA1.hash('some text'));
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Apr 26, 2011
My application uses fx tag in which it loads some xml. I want to create the xml name by binding, but I get an error that Data binding expressions not supported with attributes processed at compile time.
<fx:XML id="{xml_props}" />
<fx:XML id="{xml_props}" />
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Oct 8, 2009
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private function init():void
{
if (queFlag == 'a')
[code].....
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May 3, 2010
I'm having some troubles with binding data. I have an application that contains a viewstack of components. Let's say I have comp1, comp2 and comp3 inside the viewstack. Each component, has its own data class --> comp1Data.as, comp2Data.as and comp3Data.as. All values in each component are binded to the corresponding data in it's data object.
A click in a control in comp1 leads to comp3, the same goes for comp2. Clicking a control in comp2 leads to comp3. When going from comp1 to comp3, comp3Data.as is initialized and and comp3 displays the binded values. When going from comp2 to comp3, comp3Data.as is also initialized but the binded values are not displayed...
[Code]...
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Aug 20, 2010
I'd like to add a derived property to flex:[code]However, derived won't update when I change a or b.Is there a better (faster) way to make derived update than giving a and b setter methods which invalidate it?added keyword "get".This makes more sense now, I hope.
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Nov 23, 2009
I need to bind a property to an edit control and have the control write its value back to the same property. The problem is, I'm setting the source value before the control is created:
<mx:Panel>
<mx:Script>
<![CDATA[
[Bindable] public var editedDocument: XML;
[code].....
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Mar 30, 2010
I'm using Flex with Cairngorm framework.I have a custom component which I create like this:
<components:FriendSearchPaginator id="searchResultsPaginator"
paginationElement="{_model.findFriendsPaginationElement}"
visible="{_model.friendsSearchResultsPaginatorVisible}" />
Where the findFriendsPaginationElement is inside the model locator:
public var
[Bindable]
findFriendsPaginationElement:PaginationElement = new PaginationElement();
Inside the custom component I have button that uses a property of findFriendsPaginationElement object:
<s:Button id="previousButton"
label=" prev "
click="paginateSearchResults(false)"
enabled="{_model.findFriendsPaginationElement.more_previous}"/>
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Jul 21, 2010
I'm binding two AutoCompleteModified objects to one another; meaning you type in one and it selects the correct object in the other. It works fine when I define it in MXML: However, a user can add a new row to a Grid and then I set up the binding and objects via actionscript and it gives an 'undefined' error:
ChangeWatcher line 427/wrapHandler.
var innerHBox:HBox = new HBox();
var dtc_acm:AutoCompleteModified = new AutoCompleteModified();
dtc_acm.dataProvider = data2;
dtc_acm.labelField = 'id';
var cp_acm:AutoCompleteModified = new AutoCompleteModified();
[Code] .....
If I only keep it 1-way binding then it works fine. But both throw this error. Is there something about not only doing it 2-way in actionscript, but adding components that aren't on the stage yet?
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Oct 1, 2010
Does data binding work with the UITextField? Unfortunately, I'm getting the variable instead of the bound data.
[Bindable]
public var myString:String;
in a function, where tf is a UITextField:
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blah blah...
tf.text="{myString}";
It's giving me {myString} instead of its data.
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Mar 19, 2011
I have a bit of a problem (since I'm not used to binding with AS3), the thing is that I want to do this kind of data binding:
<mx:Application xmlns:mx="[URL]"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
[Code] .....
But the ComboBoxes are being created dynamically with AS3, everything is working except I cant bind the second ComboBox dataProvider to be the XMLList in the first ComboBox's selectedItem.
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Jun 2, 2011
I love MXML but am starting to notice some of its drawbacks. The main one I'm struggling with is its larger memory usage due to the need for binding. In the super simple code snippet below, which I've tested on Flex 4.0[code]...
My main question: is there any way to set variables in MXML that doesn't eat up memory? I'm aware that I can do this explicitly in AS and keep MXML as a bare bone structure but was wondering if there was an alternative path.
Secondary question: why memory usage in c different from a and b? I've looked up at the intermediate code and it seems like the const case still sets up some binding logic but not as much and have been wondering why that is.
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May 2, 2007
how you set up data binding betweenDataSet and Tree component?
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Apr 12, 2012
I have two Datagrid in flex. I am binding data from Datagrid1 to Datagrid2 like
(Datagrid2.dataProvider=Datagrid1.dataProvider as ArrayCollection;)
If I delete Datagrid2 data then automatically another Datagrid1 deleted .
So I don't want delete data in Datagrid1 . how can i do that , But I have other option for delete data to Datagrid1?
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Sep 15, 2009
In Flex 3, I've created a ComboBox within an MXML component similar to the following:
<mx:ComboBox id="comboBox" dataProvider="{_choices}" />
<mx:Script> <![CDATA[
import mx.collections.ArrayCollection;
// etc...
public function get choices():ArrayCollection { return _choices; }
[Code] .....
In the parent MXML application, I'm modifying the contents of the choices property:
myComponentId.choices.removeAll();
myComponentId.choices.addItem({data: "NY", label: "New York"});
myComponentId.choices.addItem({data: "CA", label: "California"});
// etc...
The binding is working in that the ComboBox is automatically picking up the new contents added at runtime, however it is not adjusting its width. The initial width of the ComboBox is wide enough only to show the initial item "All" declared in the component. However, I want and would have expected the ComboBox to re-size automatically during binding to be able to show "California", but it isn't. How can I get the ComboBox to update its width after I have added new wider labels to its dataProvider?
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Feb 20, 2010
I have a main.mxml application that lays out my application, it contains a "browse and upload" button. And contains an image to view the users uploaded image like so:
<mx:Application
<mx:Script>
<![CDATA[
[Code].....
In my myModel class I have a img_scld_bm that the browseAndUpload() function draws into after scaling it.
My intent is that my mx:Image will display the image. As shown here I'm assigning the image source="mymodel.img_scld_bm", this ends up just showing a broken image icon.
I also tried data binding, where in my myModel class I have [Bindable] var img_scld_bm. And then tried setting my mx:Image source="{myModel.img_scld_bm}" .. that didn't seem to do anything either. All this compiles fine, no warnings. I think in this case, I'm not setting a trigger or propertyChange event to update the binding?
how to correctly bind an mx:Image source to some bitmap?
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Jun 8, 2011
class A: with a property "data:ArrayCollection". It's my data source (data provider) and has bitmaps.
class B: has an instance of A (called "Ainst") and calls the following method: C.init( Ainst.data). To pass the data provider to Object C.
class C: has a reference of the data provider "data" (because of "init" method). It shows the arrayCollection into Images as: Image.source = data.getItemAt(0).
But C never updates its images, that is, data binding doesn't work with this scheme. I've put [Bindable] meta-tag in all properties and even classes.
[Code]...
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Jul 5, 2011
How do you set the selectedColor of a colorpicker when you bind data from a database? I have a bindable variable, objProject, with a field called color and it has a color code such as #ff00ff in it. I want to set the selectedColor. I tried to cast the color as a uint, but no joy.
objProject = cmbProject.selectedItem;
c = uint(objProject.color);
<mx:ColorPicker id="graphColor" x="17" y="219" width="128" height="40"
selectedColor="{c}" editable="true" />
I did try selectedColor="{objProject.color}" and that didn't work either.
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Jul 27, 2011
i'm using flash builder 4..i want to ask something..how to binding data to custom list component in flex??...i already try binding data from webservice to standard datagrid component in flex, and it's work perfectly...this is my code for binding to datagrid..
<mx:DataGrid includeIn="LobbyPage" x="30" y="319" id="dataGrid" creationComplete="dataGrid_creationCompleteHandler(event)" dataProvider="{TakeUserResult4.lastResult}">
[code]....
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Dec 5, 2011
I'm trying to extend ButtonBarButton to include an additional label that shows the number of updates for the respective box in a viewstack (which is the tabbar's dataProvider).
I can get the additional label (named indicatorLabel) to read an initial value from data, but I can't get it to update automatically like the actual "label" attribute. My understanding was that you could bind to the data object, but that doesn't appear to be the case.
[Code]...
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Feb 11, 2009
I have a class that converts external XML to various controls. The class makes a check to see what kind of control to use from the XML (Radio / Textinput / Date etc). and then adds it as a child of a form item, the form item is then added to the parent form and the loop is repeated until all nodes have been checked for controls. This work great. I would like to bind the data in the control with a data model but I'm not sure how to go about doing that.
I saw in the livedocs you can create models in MXML but I don't think this will work as the model will change depending on the XML as well as the items that are recorded. Another thought was to pack all the values into an array but I couldn't get this to work. If the array looks like a good idea I'd like to record 3 values within the array called 'answers' I'll post my code below...
ActionScript Code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Form xmlns:mx="[URL]" creationComplete="loadData()" verticalGap="1">
<mx:Script> <![CDATA[
import mx.events.FlexEvent;
import com.neph.vo.PatientVO;
[Code] .....
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Jun 23, 2009
Is there some way in Flex where I can tell when all of the data has finished binding to my AdvancedDataGrid? I have a bunch of label functions that run and I need to a busy cursor while the grid gets populated. I then want to remove it when it's all done. And also fire another event.
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