I have following itemrenderer
[Code]...
My question is Should above logic go in updtaeDisplayList or remain in set data() itself. The output is smae from both. Whats the performance impact difference if we consider it from lifecycle perspective.(The heavy computations should be pushed towards the end of the frame rendering)
I've read in the flex developer guide that you sometimes need to override one of the lifecycle methods like: commitProperties and updateDisplayList but I've written a few flex apps without ever needing to implement them.when do I need to override them?
View 2 RepliesI've got a custom class that extends the Button UIComponent. I'm trying to override the drawEmphasized() function and a few public get/set functions. I get "1020: Method marked override must override another method." for each thing I try to override. The SWF that uses the custom button will compile and work, but I don't know if the failure is creating some of the strange behavior I see. The errors appear when I drag a component onstage, or save the FLA. This seems related:
View 7 RepliesI always have a question about override custom event. I am not sure why or what do to inside override function. I searched google but didn't get too many feedbacks. EDIT: My projects seem work fine even though I use my custom event without override. Anyone could explain it?
View 2 RepliesTo allow you to tab through itemrenderers in spark you simply set hasFocusableChildren="true". However when you tab to a row/tile which is not visible, it doesn't automatically scroll the List.
What's the easiest way of making this happen?
I have item renderers in an mx.controls.Tree that I need to refresh on demand.
I have code in the updateDisplayList that fires for only some of the visible nodes no matter what I do. I've tried triggering a change that they should all be listening for; I have tried clearing and resetting the dataProvider and the itemRenderer properties.
private function forceCategoryTreeRefresh(event : Event = null) : void
{
trace("forceCategoryTreeRefresh");
[Code]....
The nodes refresh properly when I scroll them into view (e.g. the .data gets set), but I cannot force the ones that already exist to refresh or reset themselves.
I'm creating a list of scores for a game. now most of the list i need to have the same ItemRenderer. but in one specific row of the list where the user who's playing is listed, it should show different information and with different background color. how can i achieve this ?
I already tried to resolve the issue with states, i created 2 states, one state called 'mine' and the 2nd state called 'others'.
the problems that i got is that when users click on one of the list rows that state changes to i donno clicked or something and that's why i assumed that states are not the right action for me.
I have a List class with an itemrenderer. How can I get the itemrenderers to divide the List width between them? Normally, I would think this would be a easy as giving the renderers a percent width but that no worky.
Application:
<?xml version="1.0" encoding="utf-8"?>
<s:Application
minHeight="600"[code]..............
I'm building fairly simple item renderers, in fact, here's the code for one of them...
Code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
implements="mx.controls.listClasses.IListItemRenderer"
[Code].....
It's a really simple renderer that has an image and some text sitting next to it, or just the text if no image is in that item's data provider. There is also some basic rollover, rollout and click functionality...
So my question: Why is it that if my list needs to scroll it gets messed up? By "messed up" I mean that the text changes from being to the right of the image (when image is present) to moving over top of the image, as if it isn't realizing that the image is there. There's also sometimes an issue of the item renderer shrinking down so there is no longer anything even visible in the box (just some black with a grey border on the bottom about 5 - 10 pixels big...
I'm wondering if maybe my item renderer is too complex? I'm having the same issue with text working like that in another renderer, but no images, just text placed in certain positions (as well as some strage blue tints showing up at the top or bottom depending on how I am scrolling)
By the way... here is the MXML where I am initializing my list...
Code:
<mx:Canvas width="100%" height="100%" id="list">
<mx:List
width="100%"
[Code].....
I've got a spark ListForm with a custom mxml itemRenderer,all the itemRenderer has is[code]...
View 1 RepliesIn flex 4.5, I have an application that has a BorderContainer that loads a spark list (mxml style - _myList and the borderContainer is stored in a library outside of the parent application) that loads an arrayCollection with an itemRenderer (I should note said itemRenderer is not an inline renderer - on selection of an item in the list, the itemRenderer expands, loads a particular control within the item renderer based on data passed from the selected item in the list) and allows the user to perform a search. This works all well and good on startup/load, until I try to change the dataProvider for the list (my app allows users to switch data sources which then creates a new dataProvider with new variables). I have tried:
[Code]...
Basically I want to override some function in the flex/actionscript list class which creates a new ItemRenderer and passes it the required data ready to be displayed. I need to do this because I wish to show a different renderer based on the type of data being displayed. Is there such a function?
I don't really want to pass the list a single itemRenderer which calls its addChild function depending on the type of data it has - It just doesn't seem right.
A question about ItemRenderers: let's say I have an ArrayCollection that is my application data sitting inside a global object. I them populate a sparks list with this data, setting the ArrayCollection as the dataProvider.
So each ItemRenderer gets a copy of an item sitting in the array. You can override the "set data" method to set the data something more domain-specific. The problem is that the data is a copy of the original item.
Now let's say we want to add some data to the item while inside the ItemRender. For example, it could call a method on the item telling it to load some details about itself, or maybe we allow the user to modify something on the item.
Obviously, we can't do any of this if we are operating on a copy because it will be thrown away as soon as the ItemRenderer is destroyed and the original object doesn't know anything about what happened.
So what's the best practice? Should I just use the itemIndex of the renderer to pull out the original item from my global array like this:
{globalArrayCollection}.getItemAt(this.itemIndex) But it seems kind of clunky to me. Is there a best practice for dealing with this?
I'm developing on Flex 4. I have a datagrid container and custom itemrenderer with a text field, a button and a few boxes. Every time some data is displayed, the app stalls for a second or two before rendering completely. Is there any way to make it render more fluidly or render one after another...?
View 1 RepliesI have a component composed of two parts, let's say two Hbox A and B in a Vbox. On a specific call I want to:
[Code]...
The problem is that the border get drawn before the resizing of the parent Vbox happen, so i end up with a border Around the Vbox with B invisible :
[Code]...
Most examples of BindingUtils shows how to bind a property (either a public variable or a getter/setter) of an object at runtime.
But how do I go about to bind a property, such as "top" of a component, when it's only accessible via the setStyle("top", value); at runtime?
Should I just create a custom pair of getters/setters to affect the style properties of the UIComponent in question? Seems a bit unnecessary.
i am working with actionscript flex and using UIcomponents i need all the valid arguments for this function for example component.setStyle("borderColor","white");
i need all valid strings for first string parameter and 2nd valid argument for there value setting,
i have some of them that are given below but i need all possible values for this function
[Code]...
I'm working on an app which will, like most apps, have a whole boat load of buisness logic, almost all of which will need to be executed both on the server and the Flash-based client And I'm trying to figure out the best (read: least complex) way to implement the rules engine.
These are the parameters of the problem:
The rules engine must both run in a web browser (ie, in Flash Player) and on the server. Duplicating the logic (eg, by writing a "server" version and a "client" version) would be an unacceptable risk. The input/output data is fairly complex, so serialization is a nontrivial problem. We are currently using AMF for all of our serialization needs, and using another protocol would add significant complexity So it should probably be avoided. It is infeasible to implement a "rules description language". Experimentation has shown that rules are sufficiently complex that any such language would need to be Turing complete Which would also add a significant amount of complexity. The rules engine will not need to make some, but not very many, service calls.
Currently, the best contenders are:
Writing the code in ActionScript, then running it on the server. In theory it's possible to start up an AVM instance, get it long-polling a gateway, then pass data back and forth that way But that seems less than ideal. Writing the code in haXe. I don't know anything about haXe's AMF support, so that could be a deal-breaker. Something involving Tamarin. Seems like a viable option, but I haven't done enough research to tell either way.
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.
I have the following MXML:
<mx:Script>
var someBoolean:Boolean = determineSomeCondition();
</mx:Script>
[code]......
I want to use Adobe mxml to create a swf. However, the mxml gets compiled to swf itself and is not available after creating the swf. I want to add states with UI components without compiling it every-time.
View 1 RepliesI am currently developing a dynamic LineChart in FLEX 4.I am implementing a Tree control next to my LineChart, which will filter the LineChart dataprovider and lineseries. The tree control has several branches and ultimately 5 children (leaf nodes) at the bottom of the last branch.I need the leaf node/children to be displayed as checkboxes inside the tree control.As I understand,this will require overrides in the TreeItemRenderer class.This is where I am a little confused on how to implement that.Currently I can distinguish between leaf and branches using this code, in my main MXML component.I added this because it may be helpful to some beginning FLEXdevelopers, such as myself, who cannot easily find this functionality documented well:
private function treeClick(e:ListEvent):void {
_selectedItem = Tree(e.currentTarget).selectedItem;
if(mainTree.dataDescriptor.isBranch(_selectedItem)) {[code].....
I am looking at the TreeItemRenderer override class from the following example here: In the example, they override the "createChildden" super function to add checkboxes to the tree control.My question is, can I override the createChildren function directly in my MXML component, and not have to use an entire class file to override this functionality? Must I re-invent the wheel to do this?Also, how can I distinguish that my treeItem is a leaf node and not a parent, in the override function? I only want to add checkboxes to the leaf nodes, how can I differentiate? The following example adds checkboxes to all branches and leaf nodes, but I want to add checkboxes only to leaf node/children. How would you approach that?
override protected function createChildren( ): void
{
super.createChildren( );[code]............
Here is my tree tag:
<mx:Tree id="mainTree" dataProvider="{treeData}" itemRenderer="TreeCheckBoxItemRenderer" labelField="@label" showRoot="false" width="100%" height="100%" itemClick="treeClick(event)" />
i have written an air app which is fixed in dimensions: 1000 w X 800 h i have set the resizable and maximizable tags of the app-xml to false, to prevent the user from changing it's size. this app looks and interacts perfectly at these dimensions but not at other: it has "bad" coding techniques in it like hard-coded display sizes and such, rtl and ltr combined layoutdirections and so forth...
when the applicationComplete event dispatches, i check Capabilities.screenResolutionY and if it is less then 800 i want to resize the app programatically (preserving the width/height ratio). i have tried all the StageScaleModes and tried changing the dimensions of the stage, the nativeWindow, the app itself("this") and so on in every combination.
i am looking for a way to resize the entire app as is, meaning i dont want to use display logic of the components and such, just to "shrink" or "expend" the whole app as is, with hard-coded pixel amounts to change within the logic of the app accordingly (change all sizes, locations, fonts etc.. in sync) the app should look and work exactly as it did in it's 1000x800 default size, only smaller or bigger
I am dynamically creating a canvas, and I need a background image within the canvas. The canvas is created as it accepts drag drop but the background image does not show up. The trigger for the canvas is: buttonNew.addEventListener("click",addCanvas); The canvas code is:
[Code]...
I have a Flex 3.2 application for which I am developing a custom style. Basically the first stylesheet gets applied first, and then my custom stylesheet. I am wondering how I can completely empty a value set in the first stylesheet with a value set in the second. The value has to be blank because if the horizontal-center value is set then any other positioning values are ignored.
Example
CSS1.css
.myButton {
[code].....
I have two datagrids and I want to override the behavior of the tab-key event, so that it goes to the next datagrid, when the cursor reaches the end of the first datagrid columns.
View 2 RepliesI'm watching this video, which is pretty goodhows how to inherit from DownloadProgressBar to create a customer preloader for your flex app.TheDownloadProgressBar class has an overridable getter for the property 'preloader.' Isn't this poor design? What does a property called preloader have anything to do with a class for a DownloadProgressBar
View 1 RepliesIn flex charting you can customize the box which displays datatip information, but is there any easy way of changing the little circle which is displayed next to the datatip box?
http:[url].....
I've found the method positionDataTips() in ChartBase which appears to do the drawing of the circle. I was going to subclass LineChart and override the method with my modified version of it. However, this method needs access to a lot of private instance variables which are only accessible to ChartBase.
I trying here to avoid having to bind resources to all my components labels ( ie a button) and find a way to have this automated.
Problem: It corrupts the layout in design mode to bind directly in the mxml label="{resourceManager.getString('myResources', 'submit')}" and makes the design view useless. but when declaring bindings elsewhere, in actionScript or via a bind tag, it is counter productive and prone to many errors and miss.
Proposition: I would like to create my own button that automatically invoke resources to localize a button label. So the author puts "Submit" in the mxml description of my button, and when running it would take the value of the label ie "submit" and use resourceManager.getString('myResources', 'submit').
but I can't find the way to override the set label function, Is it possible if yes how? else how can I go about it?
Maybe I am missing an essential process here that would make the use of resources more elegant, as well as how to override such thing as a button's label.
I have an HTTPRequest in mxml that has an mx:request defined inside it. I use the info in the mxml request 99% of the time (I thought it was 100% until I found this bug). So I need to send the HTTPRequest with one of the items in the request different. I tried using the send() method and sending my own object, much like you would if no request was defined in the mxml, but it doesn't seem to override it.
Any ideas how I can accomplish this without re-writing every call to send this httpRequest?
