Flex :: Switching Between Data Providers ?
Jun 5, 2009
Suppose I have one combo box and I am switching its data provider from oldDataProvider to newDataProvider with ActionScript. Both data providers are ArrayCollections. Then, when a change occurs in the oldDataProvider ArrayCollection, it affects the combo box, although it is not its data provider anymore. Specifically, when removing an item from oldDataProvider (in the range of the newDataProvider values), it decreases the selectedIndex value of the combo box by one, changing the selected item.
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Jan 15, 2010
Can I create a LineChart with multiple data providers? Since LineSeries has a dataprovider property, I'm assuming the answer is Yes
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Jun 11, 2010
I am working on a modularized Flex application, and I am trying to cut-down on the amount of client-server interaction.Every time a module is opened, a request is made to a web service to get values to bind to the Flex form. If a user closes the module, and then reopens it at another time during their session, the same web request will be made.Since this data is static, i.e. not changing, I am thinking about creating global variables to hold the data providers. On the initial application load, a series of web service calls will be made to fill all needed data providers. Then, any time a module is opened, it can use these global providers instead of making unnecessary and repeated requests. These are NOT going to be huge providers, so I don't think browser memory should be a concern.
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Aug 26, 2009
I've got a bit that loads a big chunk of xml data about products.I push product info into an array(e.g. productArray), then add that array to another array (e.g. allProductsArray)How do I sort those arrays? For instance, if I want to sort the allProductsArray based on the info in productArray[0]?Alternatively, would something other tha an array of arrays be a better route?This loader loads the same sort of info for many different clients, so the bit to sort on will change.
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Aug 28, 2011
I want to be able to share videos from my Wordpress site to Facebook using different video providers. I was able to use my own video player, but I'm not ready to post videos using my server and I prefer to have users post using a provider like youtube, vimeo, facebook, ect.. Right now my site has those kind of video players. I edit the meta tags several times, this is the one I currently have:
[code].....
I also tested it using a single youtube video and it worked fine. But since I have other videos beside youtube I can't do it where it just gets a youtube id. Yesterday the posts without videos were showing up, but now when all posts gets share it shows up like if it was a video on my wall, so if clicked it will give an error. I been pulling my hair all week with this and still couldn't get it to work.
when I update my script, it takes so long for facebook to update the change. I have to wait for so long in order to test it again, like if facebook is holding it in cache for too long, is there a way to bypass that?
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Sep 7, 2011
how to explain this behavior but I'll try. I am loading images from an external url that requires basic auth so I am using URLLoader to load the image from a unique ID. The ID gets passed to the itemrenderer which then proceeds to load the image. But the images switch around on their own when I scroll. If I load more than 7 images or so it starts repeating images....
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Oct 26, 2009
I'm running into an odd issue with itemRenderers inside a TileList.Here is a working example without an itemRenderer: 152.org/flex/
Here is the broken version with an itemRenderer: 152.org/brokenExample/. (I don't have the rep to make both of these a link)Both examples have "View Source" enabled.To see the problem use the broken example, select an album and scroll down one row. Scroll back up and the images will be switched.If you try this on the working example it's fine.This seems to be a widely known bug, but I can't find a solution for it.
UPDATE: I started playing with this example again and found out something else. Turns out you don't have to override the data setter. You can create a new method in the itemRenderer that is set whenever the tile wants to refresh. So the trick is to not rely on the initialize or creationComplete methods.This is what I have for the itemRenderer in the Application.
<itemRenderers:ImageTile img="{data}"/>
This is the code I have in the itemRenderer.
public function set img(value:String) : void {
trace("setting source: " + value);
this.source = value;[code]....
I updated my example to reflex this change.
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Apr 8, 2010
I have a email form in a custom component that is put in the main application when switching to the email state. When someone searches something it will switch back to the search state. But when the person eventually goes back to the email state the contents of the form is still there. I tried doing a creationComplete and running a function that makes the fields have no text such as email.text = ""; but this doesnt work.
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Dec 17, 2009
In Flex 4 (beta 2), I have a list control populated from an XMLListCollection. What I would like to do is when an item is selected in the list, use a custom item renderer on the selected item as well as the item that appears just prior to the selected item in the list.
I am using a spark list control, but I am open to alternate components if the solution makes sense.Here is the strucutre of the xml used to populate the XMLListCollection
<Images>
<Image>
<Id>1</Id>
<Url>http://www.mydomain.com/image1.png</Url>
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Jul 20, 2010
I am passing to the source property of a VideoDisplay component a DynamicStreamingVideoSource object with 3 different dynamic live stream items, described by this XML, for your consideration:
src="rtmp://88.87.56.214:1935/live/fashiontv_tmo_h.stream" bitrate="19200"
src="rtmp://88.87.56.214:1935/live/fashiontv_tmo_m.stream" bitrate="9000"
src="rtmp://88.87.56.214:1935/live/fashiontv_tmo_l.stream" bitrate="3600"
But the player then runs the stream with the lowest bitrate, out of those 3. Wasn't it supposed to go for the stream with the highest bitrate, that is viewable by the end-user? All 3 streams have been individually tested and they are all viewable.
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Sep 12, 2011
I'm working on an app in which I want the viewstack to switch views on certain events. I have them switching correctly but there appears to be a slight "blink" when the change between views occurs. I've tried creationPolicy="all" but that doesn't fix the problem. The reason the "blink" is so noticeable is the fact that the views in the viewstack are different width/heights. Is there a way to stop this "blinking" effect on viewstack view switch?
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Mar 25, 2010
In my view I have a welcome screen:
[Code]...
Which is a pretty small component and I have panelContainer:
[Code]...
Whilst the user is reading the warm and fuzzy welcome note in the welcome state I want to be creating the big expensive panels state so taht when we switch there is no delay. Before the panels state is set panelView is null but I presume there must be an IDefferredInstance floating around somewhere that I can use to kick off the creation of the view. How can I get hold of it?
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Jun 17, 2009
In flex 3 I have a hierarchical data structure. I would like to display the content of it in a tree. My problem is that I have nodes which data calculated from children nodes. How to structure the hierarchy to make automatic changes to those parent nodes, if their children's data changed? For example:
Every node has a warning flag. If some of the children warning flag changed to true, then the parent warning flag should change automatically set to true. A node integer field is the sum of the children integer fields, and if any of the children changes, the parent integer field "calculates" the sum immediately. Is there an easy solution wit good structuring changes happen automatically, or I have to make some custom functions?
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Dec 28, 2009
I have to populate an Advanced Data Grid which have the following fields: Continent->State->Society-->Actual Value-->Estimate Value I want to simulate a financial market so i have to change some of the values by asynchronous request from an HTTPService; If necessary i'll post the .as file, but it is generated automatically by Flex Builder.
Here's the code of the client side Flex/Air application:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute"
[Code].....
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May 25, 2011
I want to separate the data from the PHP call to Different CollectionArrays So that I can use the data for a bar-graph;
I created a static version of the bar-graph and separated the Collection array manually I don't want this done manually I need to do it dynamically. So what I am trying to understand is where to put the event-listener how to add to a collectionArray then once the collection array(s) are built. use that information to build the bar graphs...
/*
*
36, > 2 years, Compliance
6, 0-90 Days, Compliance
[Code].....
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Jan 10, 2012
I've got a Gridcolumn in a Datagrid (Spark). The Column's dataprovider is a Number value that gets updated via Binding.Now, without an item renderer the cell displays the correct values.If I set an item renderer, I can't access the values in this renderer.My renderer looks like this, so nothing really do here (for now) but to trace the value, but the value is always NaN.
<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark" width="100%" height="100%" >[code].......
without the renderer, the column displays the correct values, so apparently the DefaultGridItemRenderer works fine.As requested, here is my Datagrid;
<s:DataGrid id="dataGrid" dataProvider="{_listItems}">
<s:columns>
<s:ArrayList>[code]..........
_listItems is an ArrayList with instances of a model class, which has (amongst others) a property called change of type Number.
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Mar 15, 2012
I have been goggling a lot to find anything with link-based data visualization in Flex 4. something like below screen shoot (made using Ravis). Where user can drag these nodes, without removing the links and on double click of any node we can set some properties for that particular node. I found this Ravis (Birdeye), but not much of examples and support is available for that.
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Jul 27, 2009
I have a data grid who's data provider is set to an XML object.
Code:
<mx:DataGrid id="streamMonitorGrid" dataProvider="{_data.stream}" height="100%" width="100%">
[code].....
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Oct 15, 2009
I have an xml file (externally saved) that is similar to the following:
[root]
[main]
[title]...[/title]
[Code]....
What I like to do is to get what's in [title] tag using HTTPservice, import it into Flex, and save it as array objects, and do the same thing for [content]. This way I can later refer the array object saying title[0] or content[2].
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Dec 4, 2009
I have a DataGrid whose dataProvider is an Array of int Arrays (each with different lengths). Since each row has variable size (and I want to display all the data), I decided to extend DataGridColumn and overwrite the itemToLabel function to be able to display the data. The problem is that I also need to display the data differently depending on the int value.
I believe the only solution is to write an itemRenderer, but the only input the itemRenderer.set(data) function receives is the entire int Array. I believe I need either the exact string returned by itemToLabel or the column index of the cell the itemRenderer is for (to basically do the same parsing I implemented in itemToLabel).
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Nov 11, 2010
I am trying to drag and drop hierarchical data in the same advanced data grid, and I would like the data provider to updated when the ADG is updated. (I want to be able to save and load this tree, so it is important that drags and drops are saved.)
[URL]
The sample app has an ADG showing hierarchical data as well as flat data. The first column of each datagrid shows the rowindex of the underlying data.
If you rearrange the items on the left ADG, the row indexes become unordered. If you click traceTree you see that the data provider is not in order.
On the other hand if you do the same on the right, the row numbers stay ordered even when the objects move around and if you click traceFlat, the data provider is in the order shown on ADG
My goal is to have the data provider order match the ADG order for the left grid which is displaying hierarchical data.
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Jan 7, 2010
need to load 10 records from database in advanced data grid. After i scroll the advanced data grid. it has to load 11 to 20 records etc.
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Oct 5, 2010
I have a radio button group within a data grid, whenever I attempt to change the selected radio button the web page crashes. Below is how I put together the radio button in the data grid.
MXML
<mx:Accordion>
<fx:Declarations>
<s:RadioButtonGroup id="cover"/>
[Code]....
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Oct 7, 2010
My data grid is displaying stale data, rather than the real time data available in it's data provider (array collection). I've tried refeshing the data in the collection, but that has no effect. Below is my code, does anyone see what could be the problem?
<mx:Accordion/>
<fx:Script>
<![CDATA[[code].....
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Nov 4, 2011
If user change the value of the TextInput, then click refresh button to retrieve the data model from backend again, the GUI value will not change back. Re-binding not happen, Since the value of data model not changed, no propertyChanged event fired.In this case, I must Programmatically set the model value to the GUI after data refreshing done.I know bi-directional binding can solve this problem(when user change value on GUI, set the new value to data model immediately). But sometimes I cannot use bi-directional binding, for example, the data model is a int, but user input a non-int value, I cannot set the value to data model. So the value in data model do not change, when refresh data, rebinding still not happen.
This will make the data binding useless. How to resolve this?I put pseudo-code here for now, I will put real code later:1. retrieve a data model from server, via blazeds or something else.2. bind the model to a TextInput on GUI.3. user change the TextInput text.4. User click a refresh button, triger retrieve the model value again.5. Now since the model value do not change, no PropertyChanged event fired.6. GUI value still is the user's input, not the value from the model. can clear the model value before set the velue back, make re-binding happen.(but sometimes you do not know how to clean the model value, take int for example, you may do not know the original value and happen set the same value). Or I can manually set the model value to GUI. But both are not good looking.
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Jun 24, 2010
I have paginated data grid having more than 5 pages (100 records/page) now i want to sort them all on just clicking on fields header
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Aug 18, 2011
I want to display the same data in a chart and a data grid. I want to use the same data provider for both of them to reduce the amount of SQL queries.How do I transform the database structure into the chart structure and into the table structure using ActionScript?*
Database structure in JSON format:
[
{key:, year:, value:},
{key:, year:, value:}
]
Data provider structure required by a chart:
[
{series1:, series2:, year:},
{series1:, series2:, year:}
]
Data provider structure required by data grid:
[
{key:, year2000:, year2001:, ...},
{key:, year2000:, year2001:, ...}
]
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Nov 17, 2009
How can I write this snippet of code for a button in AS3?I'm having a hard time completing this.Here is my AS2 code.It is attached to a button.[code]
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Aug 24, 2011
I want a data tip to appear when mouse pointer is over any point of the chart, not only when pointer is directly over a data point.
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Aug 23, 2011
i made a character that has 5 frames:
1st nothing
2nd axe
3rd spear
4th sword
5th bow
i am trying to make it so the weapons will switch when i press the a,b,c,d,e button on the keyboard( i will figure out the actual button l8r) i have made a mc clip button to make it switch which works but i cant figure out how to do it from the key board
[Code]...
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