Flex :: PureMVC: Unique Mediator For Each Tab In An Interface?
Oct 12, 2009
I am building a tabbed interface for switching between various similar layers. Each layer will have a number of graphs. By dragging with the mouse the graphs can be rearranged or even moved between layers. My question is, is it best practice to register a unique mediator for each layer that keeps track of the layers content / organization, or should i keep track of it all with one central mediator.some considerations:
the layer contents and organization will be saved(in a db) so that it can be restored when a user comes back to the app.the layers themselves are functionally identical.the user can add and remove layers at will.
I have one question about pureMvc. I use pureMvc to build an engine, in the engine init part i have an requirement
1) moduleA must init firt 2) moduleB , moduleC need init after moduleA init complate. 3) moduleD need init after moduleB & moduleC init complate. 4) moduleA , moduleB , moduleC , moduleD all extends Proxy beacuse the four system all need to send notifiation ,but no need to listen it.
But to fit for the requirement I can't use command to do it, because they have ini order and also they need to remember current state(ex: moudelB is init Complate but moudleC is not init complete then can't init moudleD) but command is stateless. The best way I think is use one Mediator to do it, beacuse it can both listen and send notification. My question is :
1) Is this a good way to use one Mediator to do it? 2) If use Mediator is good way, then when it hear first moduleA is init complate registerCommand(FIRST_MODULE_INIT_COMPLATE , initStepTwoCommand); sendNotification(FIRST_MODULE_INIT_COMPLATE); removeCommand(FIRST_MODULE_INIT_COMPLATE); Need to do things like that way or just do the inti logic in the Mediator?
Currently I am working on flex using puremvc framework. Actually my question is related to where to register mediator in puremvc framework. One of my colleague is registering mediator in views(components) creationComplete method only (inside view). While my preference is send some notification from creationComplete method which could be handle by some command and command will register mediator. So which one is better approach in terms of best practice ?
I'm trying to retrieve that mediator on another page like so:
var navPageMediator:NavPageMediator = facade.retrieveMediator(NavPageMediator.NAME) as NavPageMediator;
However, that statement returns null. If I try to cast it using the NavPageMediator(facade.retrieveMediator(NavPageMediator.NAME)) syntax instead, I get a TypeError: Error #1034: Type Coercion failed: cannot convert com.website.mvc.view.page::NavPageMediator@237560a1 to com.website.mvc.view.page.NavPageMediator.`
I can't, for the life of me, understand why NavPageMediator@237560a1 would be unable to convert to NavPageMediator, nor what happened in between registering the mediator and retrieving it that caused this. Especially since trace(new NavPageMediator() as NavPageMediator); returns [object NavPageMediator].
Incidentally, and this may be part of my problem, I don't understand what the @hash at the end of the object is (@237560a1). Is it simply an internal identifier for that class instance?
Edit:Left a bit of important info: The SWF in which I instantiate and register the mediator is separate from the SWF in which I try to retrieve it.
I've just recently learned the PureMVC framework, and am a little confused as to the coupling between Proxy and Mediator objects. The links on this page connect to some documents describing the framework. (Please note, the links on the aforementioned page open PDFs.)
The diagrams and examples of PureMVC I've examined often show a direct coupling between a Mediator and Proxy. When the proxy's state is updated, rather than sending a new Notification, the Mediator (which retrieves a reference to the Proxy from the Facade) has its state updated.
This certainly seems to simplify the logic of the code, but it also directly couples two seemingly disparate components together. To my understanding, a Mediator's purpose is to translate Events from a view into PureMVC Notifications. Proxies are meant to perform some function to gather data and relay it back to the view. These two components seem to exist in different layers of the application, and perhaps shouldn't necessarily be coupled together.
Wouldn't it make more sense to have the Proxy objects send their own Notifications when their state updates, which are forwarded to the interested Mediator by the Facade?
I'm building modular application with 2 modules which share common vo: ShopRegionVO
This vo is also a BlazeDS entity and is mapped to a remote java object. When shell loads first module everything is ok. The second module is a list of ShopRegionVOs and item change is handled with the following code:
Often multiple instances of the view component would be used in multiple places in an application. Each time I do this, I register the same mediator with a different name. When a notification is dispatched, I attach the name of the mediator to the body of the notification, like so:
I'm looking for suggestions regarding implementing process flow / work flow management in a PureMVC based application. Our Flex application includes a number of processes such as account creation, payment processing, etc. Within our team, there is some discussion of how rigidly we should adhere to the PureMVC model. Within the PureMVC model, it seems reasonable that the current state in the process could be managed in a Proxy. Commands are clearly responsible for processing the actions required of each node and for node transitions. Mediators for managing the UI.
However, I think that there is an important bit still missing here: a ProcessController. The approaches we've reviewed all seem to either violate the PureMVC model (even just slightly) or make unreadable code. A proxy would maintain the state of the process. As such, it seems to be an appropriate way to implement the controller. However, this is putting a lot of business logic into the proxy.
I was wondering best practices for views of inherited classes in PureMVC in this situation: Multiple classes inherit a BaseClass (lets say InheritedClass1 and InheritedClass2) Each InheritedClass has a respective view (derived from a base view class, but each unique) With a given dataset (lets say ArrayCollection of InheritedClass1/2 Objects), the respective views need to be dynamically loaded. The dataset is relatively large, so a TileList would be nice (since it only instantiates objects which are currently displayed) I can think of a couple solutions, but I find them to be too "hackish" to be the best solution:
In View: Repeater over a BaseClassView which attributes a view to a State (set to the "InheritedClass1" state to add a InheritedClass1 object) Pros: No unneeded memory increase (States' objects are instantiated when needed) Cons: View is dependent on the data types, so adds coupling In Mediator: Loop over the ArrayCollection and addChild() the views based on data type Pros: Works. Cons: Mediator is adding things to the View, which defeats the point of the separation of Mediator and View. Slower than a Repeater.
I have a flex application written using PureMVC framework.Now,I want to write tests.We are using FlashBuilder 4.Is FlexUnit sufficient for testing? Are there any issues you have faced while writing tests?
My company is building a Flex application that we may need to port to other platforms:
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Currently, I'm looking into application frameworks to build upon and I'm torn between pureMVC and Swiz. I LOVE swiz for its simplicity and how it just gives you a way to hook things up and then apply your own patterns. From a flex-only perspective, this is my 1st choice. But, PureMVC is platform-independent and has already been ported over to most of the platforms that are mentioned above. How valuable is this portability? Will it really make our lives significantly easier when it comes to porting and developing/maintaining multiple applications? If so, then it seems like PureMVC is the way to go.
Alternatively, since Silverlight has the most definite business case for porting of our application, maybe we could port Swiz to Silverlight? I'm not too familiar with which AS3 language and Flex framework features Swiz depends on and whether they are available in C#/Silvelright.
I'm working on an existing modular project that was built in PureMVC. Instead of converting everything over to RobotLegs, I want to create a new module using RobotLegs and plug it into the pureMVC shell. Currently, when the module loads, I get the following flash error: ReferenceError: Error #1065: Variable IMediatorMap is not defined.
Inititally, I thought it was because my module needed a pureMVC Mediator to call the pureMVC StartupCommand to get things "hooked up" and THEN create the RobotLegs' Context. However, that didn't work and I'm still getting the error.
Is there a way to get a unique machine-specific system ID in a Flex application running in a browser, so that is can be used for example to determine if the machine is properly licensed to run the application?
public class MyApplicationMediator extends Mediator { [Inject][code].... So onRegister() gets called, but view is null. Also when I try to add the eventListeners I get a null reference error.
One method I could think is to loop through the Array objects and for each object check and push unique appName entries into another Array. Is there any better solution available?
I have a BarChart that compares different user interactions with a program we have. Obviously some users will have multiple sessions and depending on what the filtering is, a single user may have multiple entries displayed at once.
The problem comes in with the Category Axis, which uses the username as the categoryField. This is fine and displays nicely when there are no repeats of the username in the dataset. If there are repeats, though, it will put a new entry in the Y axis for each instance of the username, but all of the data is rendered on the first label in the Y axis.
Is there any way to keep the username as the category axis, but have the BarChart display the corresponding data in the correct spots?
I'm using a localconnection to allow communication between an actionscript 2 swf and an actionscript 3 swf.Localconnection objects share a global namespace across a user's pc.So, this means, a user can fire up my flash app in one browser, and submit commands, back and forth, which is what i want. But the user can also fire up another browser, and all commands sent to my application will be handled by the first application if its still loaded in the first browser.When I make the LocalConnection, I specify an id, but the id must be known to the actionscript 2 swfs, and therein I find a problem. I don't know how to let the actionscript 2 swfs know what the unique id is.
I am trying to use the NumericStepper component in Flex and would like to give its textField (not just the whole thing) an id but not sure how. I have already given an id to the NumericStepper itself but would like to give an id to its textInput field.
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?
How do I create a new arraycollection that can generate a unique variable name? Like: AC+nu as in AC1:ArrayCollection AC+nu as in AC2:ArrayCollection AC+nu as in AC3:ArrayCollection AC+nu as in AC4:ArrayCollection nu++;
We have a Web login feature. We will offer Free calls to a large campaign.
Scenarios:
Because of free calls, we will offer a unique file to be downloaded and stored After a week or month we will call them and offer them our desktop application to scan and see how trusted, the user is If we dont find the same file again, we will never start business and more our own statistics Based on that report we want to do some follow ups campaign We can do this with cookies but we want user experience and trust analysis
Example: if you play a music in youtube.com, without notice your file is actually in /tmp/Flash....flv with lot of data on it.
Question: How can i do the similar using Flex/Flash from the web browser ?
i have an xml which contains 'interface' sub tag, iam converting xml to object using SampleXmlDecoder. compiler did not allow me to access the value of the 'inteface' attrible of the resultobject.
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its treating interface as keyword. the solution for this.
It seems that Flex 4.5 can not compile my old AIR applications that implement the IDisposable interface. And how should memory management be done from now on?
A project requirement is that it be 1 way deeplinkable(a specific query string will load a section within the swf).I have a URLProxy that I use for all external linking. It makes sense to me to put the query string logic in this proxy. So in the constructor, I check for a querystring, and then send a notification if it equals a predefined value.One problem with this is that I'd like to predefine this query string key value I am checking against in an external xml file. So another proxy, loads-parses this config xml, then the URL proxy checks against this.
I dont have any experiencie using this pattern when developing a game, except on a data driven website made mostly in Flex.The question is, are there any drawbacks of this pattern?, let say, performance for example?If anyone implemented a game using this framework.
Which framework is the best one to execute Website projects? I was researching around Flash website blogs and articles talking about the great advantage at daily production with these frameworks.In my case i'm used to get basic/intermediate projects that consists in Animations, Transitions between swf pages and at the most important point: liquid layouts.Gaia Framework seems to help a lot at organization and singular work time reduction spent.
