Actionscript 3 :: Recursive Flex View Component?
Sep 15, 2011
I have a Flex component that is a view of a data Object that recursively has a reference to itself.
For example if you had an Employee class that references a boss field of type Person, I'd like to nest the same view for that Boss. This shouldn't be an infinite recursive relationship (e.g. I'd only be viewing the boss field of each object).
I've tried creating an MXML component that references itself but when I run it locks up (seems like it gets into a recursive loop).
Is there anything you can do like includeInLayout conditions that will make sure it doesn't even instantiate that component.
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Nov 17, 2009
I have various custom component instances in my flex app. I want to loop through them recursively and get their instance Ids. The recursive part is very important to me. I have tried doing this, but it didn't do recursive:
for each (var myItem:* in this.MasterContainer.childDescriptors)
{
trace(myItem.id);
}
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Nov 11, 2010
I'm building a top view 2D map, that it's objects are stored on the server.The kind of objects are 10 and might be a photo, label, button, lists, mix of them or labels with tooltips.The component must request the "areas" that are missing on screen.An area is 1000x1000 px and is cached in flex.To move in the map, will be like in google maps (drag-and-drop).I should be able to have another list and move objects from one to another using drag-an-drop on objects. Ex.: I grab an objects from a list and I move it on this map, I release the mouse button and the item is placed there.Now the problem is: I build a custom component for this trying to emulate the item renderer for performance and recyclage, implement drag-and-drop on objects and request the areas that are missing?
or
I extend the List component from spark and I add some features as multiple kind of itemrenderers and use recycle on them. Of course it must be able to request the missing areas on the screen and cache it's data.Maybe create a custom layout is needed too.What I need is something that must be really fluid, so the lighter this component is, the better.
UPDATE: *There will be not any object over another.
*I will not use hitTest on bitmaps because all bitmaps are wrapped in another component,as they,for now are itemrenderers.
Anyway I already begin to do this using a class that extends the SkinnableDataContainer and a custom layout. As the layout is not like a grid, is sparse, random items at diferent points(x, y).How to get the localX and localY, relative to item renderer and not to the Spark List, from a DragEvent in Flex 4?
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Aug 28, 2009
I have lots of child text inputs within a spark Scroller. How can I make the TextInput with id of "x" come into focus if I have a..z id's, also for the scrollbar to scroll automatically to that child item? I can use x.setFocus(), but the scrollbar doesn't automatically scroll to that item? why?
<s:Scroller id="scroller" width="100%" height="100">
<s:Group id="group" width="100%" height="100" id="content">
<s:TextInput id="a" text="" editable="true" width="100%" height="25" />
<s:TextInput id="b" text="" editable="true" width="100%" height="25" />
....
</s:Group>
</s:Scroller>
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Mar 1, 2011
I'm experiencing some strange text rendering behavior in the Spark RichEditableText component.
<?xml version="1.0" encoding="utf-8"?>
<s:Application
xmlns:fx="[URL]"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
[Code] .....
The above application simply navigates through the five sentences in the DATA array (every time the Next button is pressed). For whatever reason, RichEditableText component doesn't completely reset its view (by clearing the previous text) before setting new content. From what I can gather, this faulty rendering is somehow based on the combination of line count and relative width. I also discovered that if I set the width property of the RichEditableText component to an absolute value (say, 100) as opposed to relative (percentage, 100%) the text is rendered correctly. As far as I can see, this behavior is unintended and is, in fact, a bug.
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Nov 28, 2011
I'm currently building a Flex 4.5 mobile project including several views and custom written MXML components that can be incorporated dynamically into those views.How do I determine which component currently has focus, namely has been activated by the user tapping on it? The background for this is a global search function in the main application. Depending on the results of this search, fields in the custom components are set. Given that I don't want all components in a view to listen to the outcome of that search function, I have to check which one is currently active.I'm trying to bind the selected object (the result from the search function) to the active component.
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Feb 19, 2010
Let's say I'm trying to place a tooltip on the left side of a component on my view. Layout may look similar to this:
[CODE]...
After the point is converted via contentToGlobal(), the point's x coordinate is drastically incorrect. I've found a way to workaround this by simply wrapping the target component in another HBox like this:
[CODE]....
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Apr 18, 2011
does anyone knows how i could just eliminate the folder icon of a tree control and display only the leaf? supposing i have an xml structure looking this :
[Code]...
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Sep 26, 2009
In Flex Builder 3, I am trying to access the main applications view state from within a component.On initialize I show the Loginpage-component. When I click the login button I want to hide the loginpage and show my "controlpanel" page, which also is a component.I try with this, and also placing this function in the main application.[code]
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Apr 1, 2010
Do you know how if you drag an <mx:Label> or <s:Label> component into your Flex project, when you go to design mode you get this panel on the right to set its properties like text etc.
I have a custom component that I can call with actionscript, or with mxml like this:
<comps:TheComp field1="OK" field2="Yes" />
The component takes this input and uses it for its internal operation
[Code]...
When I go to design mode, I can see the component under custom components, I can drag it to the stage and see it, but can't set its values field1 and field visually on the right like a normal <s:Label> or <mx:Label> would have. how I can add that? Do I need to make it inherit something or anything else
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Mar 22, 2011
I've made a custom list itemRenderer with 2 buttons and a label. One button deletes the list entry (and thats not the problem) the second button would change the actual view.how I can change actual view within the itemrenderer ?
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Jun 7, 2011
I've used JRab's example here [URL]... to add a header menu to my app. What I'm having trouble with is executing my functions from the header mennu. For example, my firstView is appHome.mxml. It instantiates a Canvas object that has an erase(). There is a button in appHope.mxml that executes the erase() on the Canvas instance. I'm trying move the Erase button out of my appHome.mxml and into my headerMenu.mxml but don't know how to execute the erase() on the Canvas instance. The first thing I thought to try was click="{appHome.myCanvas.erase()}" but obviously that didn't work.
I asked a similar question yesterday here: Flex executing a function on another view and I accepted the answer before I tried it. The problem is that the headermenu.mxml is not a child of appHome.mxml. They are both children of the main app.mxml. Secondly, the object that has the erase() is in a separate .as class I instantiate in appHome.mxml.
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Jun 24, 2011
Does there exist a Flex view component that you could just pass it a custom object with all public fields/properties that it could reflect over and produce a basic UI view using flex components. Is it possible to use something like the Spark DataGrid with one item laid out vertically. It would only have to support:
[Code].....
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Aug 4, 2010
After setting an control's location to some site. How could I then take a peek at the associated HTML? I notice that as soon as I set Location, htmlText becomes null and vice-versa... So how would one go about looking at the HTML displayed in the control in TEXT form?
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Aug 15, 2011
I'm currently using RobotLegs with the Presentation Model pattern to develop a Flex 4 project. I understand that all business logic related to a View resides in the Presentation Model associated with that view, however, I am confused when it comes to View specific logic.For example, I have an indicator that needs to be positioned relatively to list items depending on which list item is selected. Is it acceptable in the Presentation pattern to put the logic that will position the indicator in the View and simply have that logic run in reaction to a selectedIndex property changing in the presentation model?The reason I am considering this is that since the Presentation Model does not have a reference to the view it is difficult to come up with an ideal solution for manipulating view components.
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Jun 13, 2010
I have one .mxml file (the Application) with a ViewStack (with 4 views) and a ControlBard, obviously I can change the views with it, but what I want to do is: in view #1 I have an image which I want to convert to a "hyperlink", so when I click it I go to View #2, is this doable? Also I would like to pass somehow some data (like a String) to that View #2 (lets say the it's a user avatar I click so I want to go to the second view which will show me his profile, that's why I need his name/id).
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Sep 28, 2011
My problem is that when I try to pass an object from the navigator.pushView(view, dataobject), I can't figure out how to access the dataobject from actionscript. I can access {dataobject.property} from MXML easily, but I want to set a variable in the new view to the passed dataobjects property.
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Feb 3, 2009
So, I create standard AS3 flex project. In constructor goes only start();
rest of functions are basically this:
private start():void { f1();}
private function f1():void { f2();}
private function f2():void { f1();}
And it's standard recursion. SWF either breaks or loops as many times as I tell it. One f calls the other, which calls first... I do not want that.
I want f1 to do some stuff, calls f1 and closes itself. Than f2 works, calls f1 and closes. And so on.
Like having 2 sets of code that loops through.
What's the cleanest way to do that?
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Sep 2, 2009
I create standard AS3 flex project. In constructor goes only start();
rest of functions are basically this:
private start():void { f1();}
private function f1():void { f2();}
private function f2():void { f1();}
And it's standard recursion. SWF either breaks or loops as many times as I tell it. One f calls the other, which calls first... I do not want that. I want f1 to do some stuff, calls f1 and closes itself. Than f2 works, calls f1 and closes. And so on. Like having 2 sets of code that loops through.
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May 8, 2010
In the context of AS3 and specifically a framework such as PureMVC, what an API for a View Component means.
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Jan 14, 2009
So I'm building a flash presentation and one slide has video. I have a flv component on the stage and the user wants the video to initially appear at a smaller size and then to click on it to launch the movie in fullscreen and to play. The playing is no problem but it doesn't want to launch fullscreen.Code below:
// VIDEO
moviePlayer_mc.fullScreenTakeOver = false;
moviePlayer_mc.addEventListener(MouseEvent.CLICK, launchFullScreen);
[code].....
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Jun 5, 2010
i need help using the list component for my text in animation. i want the component to allow viewers to scroll and view text.
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Nov 12, 2011
I'm building a mobile AIR app using Flash Builder 4.5. The initial view in my views package is TestHomeView.mxml. I want to refer to it in one of my .as classes elsewhere in the app, and I'm not sure how to do that.
Theoretically I should be able to add an "id" attribute to TestHomeView.mxml, but FB gives me an error: "id is not allowed on the root tag of a component". The root tag is s:view.
The reason I need to do this is that within another class I make various calculations and then need to pass an array of values to a component in my view class. So in SomeOtherActionScriptClass.as I first assemble the array, myArray, and then in that class I want to do this:
myViewComponent.viewArray = myArray;
If I'm going to do that, I also need to import the view class into the .as class, which strikes me as weird. So is there a simple way to do what I want, or do I have to dispatch a custom event which contains the array, and listen for it in the view class?
EDIT - Based on the below MVC suggestion I did the following in model:
[Bindable]
public class Model
{
private static var myModel:Model;//doesn't let me name it 'model' because
[code].....
But it is coming back null. It isn't null when I put a breakpoint in the Model class, but when I try to access it from the view class, it's null. The model itself isn't null, but that variable is.
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Jul 17, 2011
Coming from Robotlegs/PureMVC, I am pretty familiar with the concept of the view mediator, i.e. a component that pretty much listens to events/requests coming from the "dummy" view and makes a further request, sends an application-wide signal/event, executes a command, etc, based on the request from the view. Can the host component idea introduced in Flex 4 be considered a the same as a mediator? The only thing that slightly bothers me is that host components are still considered views, because they extend SkinnableComponent or any of the classes that further inherit from it. In my view, the mediator should be completely left out of view logic.
Nevertheless, I do not want to write a skin, a host component, and a view mediator for that host component, because that would be quite an overhead, and would lead to more complexity rather than abstraction.Should I use host components as mediators, and put application-level logic there, for instance application level event dispatching?
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Feb 5, 2010
Does anyone know of a component or tutorial for implementing a slot machine-like list similar to the interface component on the iPhone (example at URL...)? I did find one commercial component for flex at URL..., but am not sure how open this would be for modification (looks like it's a compiled SWC file in the example).
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Jun 23, 2011
I have a component "child" which has a cancel button. Now this component is placed in a state called "newChildComp" I also have another component called "parent". In the parent component, i have a button that dispatches an event. Here is the event code:
[Code].....
so, basically,i am checking to see if the cancel button component in the Child component, while i am still in the parent Compoent, was clicked, if it was clicked, call the cancelButtonHandler. The problem is by the time the addNewChild handles the event, that cancel button was still null. My question is how do i solve this without using the itemCreationPolicy on the cancel button?
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Aug 3, 2010
I'm about to have to write a web page/app that will serve the agenda for circa 100 people on a page. One line per person, one column per day with 3 clickable zones in each cell. In HTML, the page is way complex for the browser to load quick and there is no possibility to click on a border between 2 cells to for example split an event that spreads among several cells. So I search an not too overkilling technology to render this kind of view. I begun with a PHP generated HTML page but the number of elements in the page make the mouse move jerky.
Moving to JAVA would give me better performances regarding the reuse of the generator of the view but it will still be an HTML page. So, here is my question: do you think that going forward with JAVA and its graphical capability is the simple solution or is Flash a better option for this part of a Web App? I'm afraid of the code I'll have to write in JAVA to handle the GUI presentation as well as the events generated by the 1000's cells plus borders of the page. In Flash, the graphical part seems simpler even if the actions handling is still huge.
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Mar 18, 2010
I am wondering how to make a 360º view bubble, like they use for Google Street View, but have no idea how to go at accomplishing this task... i have the string of photos that i attached in photoshop(so that if you connected the left to the right it would be a full 360º view).
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Feb 15, 2011
There is a Flex app with 7 main views. And there is a memory issue when navigating between views.All these views were in a ViewStack, but due to some involving 3D objects I assumed it was too much to have it all in the display list. I'm now clearing all children from the stack and adding/removing them when needed. This gave a small performance increase, but still becomes unresponsive with use. The strange thing is, with this and the original method, the CPU climbs with use but eventually levels out somewhere. Now I'm creating new instances of each screen when they are navigated to and setting the previous variable to null. Now it looks like CPU is spiking when the view is created, but leveling out to something much much lower than it was. This felt like progress, but now the available memory keeps climbing where it wasn't before....
My understanding was calling remove child or remove all children would mark the object for deletion when the garbage collector next ran. I can't see any other references to the instance. My code is along the lines of [code]I have a function for each button to add a new instance like the above.The only thing I can see and feel silly asking but need confirmation, is each view extends a class called "Screen", this class contains a singleton reference to some core components.[code]Would this trick the garbage collector into thinking it was still needed? General advice on clearing Objects from the memory pool would awesome!!! I've never needed to analyze the Flash Player in such depth.I think it's an error with sound drivers, removing all sound and shes purring like a kitten. Works on my machine fine with windows XP, but not on the touch pad the application is crashing on with windows 7 (unsure of the drivers looking into them now) Now I'm thinking its not the drivers, tried 3 different versions, all with no improvement. I did discover the sound was fading in and out with the TweenLite lib. Doesn't look like there are any memory leaks in TweenLite as it works fine on other machines. Just the use of volumeEasingFunction seems to consume increasing amounts of CPU until it freaks out. It is crappy hardware running windows 7, which doesn't help.
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Nov 24, 2011
I have four views:1.SplitView (main view)2.SplitViewHomeView(root Panel)3.SimpleView(Right panel)4.Details(child of Right Panel View).I am trying to accomplish the split view as in Ipad in adobe flex mobile.But unable to connect the root panel to right panel...Can any one suggest the path to me.My Code is below
Split View
**
<?xml version="1.0" encoding="utf-8"?>
[code]...
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