Flex :: One Data Model Multiple Platforms Different UI?
Jul 3, 2011
I have designed "the core" of the application i am working on ( it communication with the server, data processing, etc. ), and now i am a bit stuck on the User Interface, because i wish it to be specific, and probably different on the different platforms it goin to run on ( PC, tablet, gsm ).
My question basically is How to separate the "core" of the application, which must remain the same for all of the platforms, from the UI's which shall be very different applications ?
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Similar Posts:
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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May 17, 2010
I have data model (dataProvider as ArrayCollection) i want to display in few views , each view should show filtered data. As you probably know, filterFunction is property of ArrayCollection,so I can't use this solution (unless creating new instance of ArrayCollection for each view on top original and impementing filterFunction).
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Dec 2, 2011
How to send to the skin some value which have changed?
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Nov 4, 2010
using model driven development in developing enterprise applications. Adobe's LiveCycle Data Services looks very promising, I have found numerous tutorials/videos that shows how fast an application can be build by having methods/functions auto-generated.What are the best-practices, is it good/bad to use those auto-generated methods, they can really save a lot of time.
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Jun 18, 2010
What are your advises on using model driven development in developing enterprise applications. Adobe's LiveCycle Data Services looks very promising, I have found numerous tutorials/videos that shows how fast an application can be build by having methods/functions auto-generated.What are the best-practices, is it good/bad to use those auto-generated methods, they can really save a lot of time.
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Feb 15, 2011
I have one that's almost done and the stage size is 700x800 px. But I'm starting to worry if that's going to look too small? To change it, will be a lot of work - there's animation, imported Jpegs etc. As far as I can tell, in order for it to look correct in larger dimensions I will need to basically create it again from the ground up. So, I'd really like to get an idea of what the optimal pixel dimensions would be for ecards to run on multiple platforms.
I really want to do this and I don't feel like I can move ahead until I get the viewing size correct. I don't even mind redoing the card. I just want my future cards to be the correct size. I don't want to have to come back and redo them all. By the way, the cards are being made in Flash. The site itself will be created in DreamWeaver.
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Apr 22, 2011
I am using AIR to make a little installer. How would I go accessing a file in there application data folder for all platforms? When trying to access it directly it works just file.
[Code]....
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Apr 10, 2011
As it is said here: [URL] "If you do a Google search today for "MVVM and Flex", the first post is by somebody who claims that MVVM is not a good fit for Flex. I couldn't disagree more. Out of the box, the Flex framework makes it much easier to implement a Presentation Model than similar MVVM implementations in Silverlight. That is not to say that there aren't good third-party libraries that make it easier in Silverlight, but without any help, it is easier to do in Flex." So MVVM as LOGICAL CONCEPT can be implemented in both but the way it is implemented in Silverlight requires more Plumbing than Flex.
What prevents Silverlight MVVM to be implemented like Flex ? Doesn't Silverlight have same capability in event system to do the same? If yes why does Silverlight do things more complicated what's the advantages then ? Is it about using Class Interfaces which are more strongly typed? What are the disadvantages also ? For example as for implementing MULTIPLE VIEWS for 1 View-Model does Flex implementation make it also more obvious?
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Jan 15, 2010
I'm updating the x and y properties of my Model.as when I drag a Sprite around the stage. However, because both setter functions dispatch an Event.CHANGE, the property that is updated second seems to get locked in place (meaning it doesn't seem to be updated with the correct value as it locks the Sprite in a horizontal or vertical line of movement).
snippet from BubbleController.as
ActionScript Code:
private function onViewMouseDown(me:MouseEvent):void
{
[code]....
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Feb 27, 2012
Do flash 3D display engines such as Papervision allow data to be exported from the swf to a php back end and vice versa (PHP into model)? Does Unity allow for this?
If I was to build a simple 'change the colour of the model' application with a UI in a 3D package such as Papervision, could I then export the user choices to php or perhaps a javascript intermediary?
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Jun 26, 2009
I want to load multiple players in my solution.Is there any problem if they have same data model with different instances names?
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Dec 17, 2010
I feel like MVC misses a letter to describe the situation in a game. The model to me seems to consist of two distinct parts:
A group of vars that describe the current game state (these will have setters that send out events on change, and getters so that the view can access what changed)
The rules of the game that determine what happens once a certain input (i.e. shoot();) has been received by the controller (these will update the group of vars as deemed appropriate)
The view will exclusively be reading from 1 while the controller will be exclusively communicating with 2. This is why I make the distinction and want to divide them up into class1 and class2.
My questions:
I am unsure if I should be making this distinction, since I haven't seen it anywhere. If I should; should I make two separate classes, or should I extend class1 with class2? Finally, I am having trouble making sure that only class2 (and not the view) can change the variables in class1 (while still being able to send out an event when a value changes).
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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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Feb 12, 2009
I'm new to FLEX.I've a requirement where i do have to load the data into Class Based Model(VO) from an Employee.xml which has got employeeName,departmentName,address & projectId tags.
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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
[Code]...
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Feb 25, 2010
I want to use one data source (e.g. an Array) for multiple Datagrids that have different filterFunctions attached and show different columns.First, I thought I use a very straight forward apporach:create the Arraycreate an ArrayCollection for every DataGrid and set the "source" property to the Arraycreate the DataGrids and set their dataProvider property to its designated ArrayCollectionSo now. every ArrayCollection can have its own filterFunction, sort state etc. but there needs tos are dispatched and I have to call itemUpdated manually on each of the ArrayCollections. While debugging into the code in order to get a deeper understanding for Flex, I tried to figure out, what this misterious "itemUpdated" method does, especially as it notes in the adobe documentation, that, if no "property" is given (e.g. it is null), a simple "refresh()" will occur.
I did not find any calls to "refresh()" in the whole debugging (and I went down the framework whole as deep as possible (btw: lots of funny comments right in the code :-) )he only thing I could find was a CollectionChangeEvent getting dispatched with a PropertyChangeEvent in its "item" property. Which was of the kind "UPDATE" (and not, as I would expect "ADD"). When trying to dispatch that event manually, it never worked (e.g. the datagrid did not update).
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Dec 18, 2010
I have 2 checkbox repeaters: The first gets populated w/ an ArrayCollection & the second gets populated w/ the "Label" and "Data" fields selected from the first checkbox....how do I pass another item to the second checkbox? In the code below, I am currently only passing the "key" and "val" fields & would like to pass "another" field.[code]...
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Aug 10, 2011
I have a list of txt files and when one is selected it is read and assigned to a string variable. this string is then pushed to a view : pushView(viewer, string), where the string is displayed in a textarea. I want to also pass the relative path of the file also. Is this possible to pass two strings?
[Code]...
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Jul 23, 2010
I am trying to figure out how to define a callback to my model object, via the Mate Frameworks LocalEventMap.
<EventHandlers type="{WebServiceEvent.RT_GET}" debug="true">
<HTTPServiceInvoker url="/services/rtGet.asp">
<resultHandlers>
[Code]....
I get essentially the same error if I try to make method="model.rtGetHandleResult"
So, in keeping with the presentation model... how do I have the event map get this to the model to execute?
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Apr 25, 2011
I am working on an StoryBoarding application,it is a slide based application in which the authors can put several components like image , sound , captions etc in each of the slide.A collection of slides will make a storyboard.This application will be deployed on a web server (sharepoint + IIS , and php+apache), and several users can collaborate with each other for authoring or reviewing the storyboard.In my application I also want to support auto save ,which will keep on storing the state of the storyboard.User can also save at any point of time by clicking the save button.I am confused about how to store the state of the storyboard.
1)Presently I am doing this by passing all the storyboard data to a dot net web-service and then that service is storing images,caption etc in their respective tables into a database .2)Another approach possible is to store the model of the application as a serialized object into the db , which will be more convenient since separating the components of the model (like images,captions etc..) will not be required and also restoring the state of the objects in the application will be easy . I have two doubts about using approach 2 :-i) I want the the saved storyboard to load quickly, for which I would like to support the partial so that lighter objects like caption can be loaded quickly but other heavier objects like image,video etc can be loaded on demand. Using approach 2 , do I have to send the whole data in one go or is there way to support partial loading ?
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May 5, 2011
In Flex world, is DTO / VO same as Presentation Model?
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Mar 24, 2012
When the XMLListCollection is updated in the DataGrid, I want it to add the XML (bind it) into the Model. How would I do this? Or if not possible, how would I manually add XML into the Model?
This is a rough example of what I'm trying to do. Adding data to the DataGrid works fine; it just doesn't go into the Model when sending to the HTTPService.
<mx:Model id="model">
<root><colors>{collection}</colors></root>
</mx:Model>
<mx:XMLListCollection id="collection" />
[Code]....
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Aug 5, 2010
Is there a FLEX component that uploads multiple files in a multipart/form-data POST request?
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Jul 10, 2009
Over the past few weeks I have been building a prototype application using a Flex front end connected to a J2EE backend using blazeDS. The prototype is an experiment to learn flex and see what its suitability is for a complex trading application requiring a large number of dynamic updates (i.e > 20 a second) via a pub sub type model. During some lightweight performance tests it's become apparent that I need to use multiple threads to ensure the UI remains stable when receiving a large number of updates from the server. All was going well until I discovered that flex has a single threaded programming model!
From a quick Google it looks as though there are numerous hacks to implement thread like behavior. I am sure many people must have been faced with a similar problem. Can people let me know: Are there any good threading libs that are well maintained etc Do other RIA technologies such as silverlight have the same problems. Why did abobe implement a single thread model? Are there any other tricks I can use to ensure my UI is stable.
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Feb 10, 2010
i have a question about Zend Framework and mainly the model part. I know there is no abstract model class and understand why. I red a lot of blog posts about it, but couldn't find any example that would clearly explain it to me. I'm building a very basic application. Lets imagine we have just three tables.company(ID, name, street, streetNo, Town), meta(ID, name, description), company2meta(ID, companyID, metaID, value, note). All types of realtionship are there (1n n1, nm). The a need also services (amf) with Value Objects. So, here is what I think:
[Code]...
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Mar 9, 2010
I'm using MATE on an Adobe Flex project for MVC. On one of our pages, we have a dialog window that is presented to the user that displays them information that comes from RPC. The pages where this dialog pops up is unrelated to the data being displayed so this is a separate model. How do I create a MATE mapping file that will create the dialog window, make it visible to the user, and then inject in data from a model?
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Mar 29, 2011
I have some values stores in my model. I need to create a copy of those values, make some changes, and then output those changes without affecting the model values.
var my_source:Array = model.something.source
var output:Array = new Array();
for each (var vo:my_vo in my_source) {
[code].....
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Jul 5, 2011
In Cairngorm (Flex Framework), there is Model Locator Pattern, which is similar to Global variables, is it a right pattern, Adobe is saying for flex its best pattern
[Code]...
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Jul 13, 2011
I have a TitleWindow that I open up... and I have 6 states defined.I am using the Presentation model pattern for all of my views. When I tell my window to go to XXX state, the controls have to initialize since the states in flex use lazy loading. so... my PM code that says myTextArea.text bombs out and say "cannot access..." so as a work around, I made some creationComplete events on my controls to register the control with the PM. So when the state changes, the textarea finally initializes and on creationComplete calls PM.registerTextArea() which sets a reference to it. then in that function I run my code... myTextArea.text.. etc.
This seems like such a ugly hack that I hate it. Is there any way to wait until the entire state in created then call code on the PM? I have tried enterstate... but this event seems to fire before the state controls are ready.I tried to add a comment, but I guess editing is the only way I can do this...I am doing something slightly off straight PM. Every view has a viewController (as I call them). Its kinda my own hybrid of a delegate / dataprovider. But this is moot. It's the flex component lifecycle when dealing with states that is the pain.if you change state.. there is no event to say "all my components in this state are ready".only event to say "we changed state". so my code that fires on state change is trying to talk to components that aren't ready yet.So from what I see, there seems to be no design pattern or perfect way to ensure that all components are created in a state unless using creationComplete on every component in the state to register it is ready... if you don't, you get a race condition. Regardless of frameworks or design patterns, this seems to be a root issue.
I am trying to attach video to a display once I get to that state. This is done via addchild. regardless of where I do it.. I need to know that the videoDisplay is done loading before I call addchild. I even tried currentStateChange event since docs say that fires last... but alas.. the components in the state are still initializing. So it seems that creationComplete is my only option. Maybe the only sane way to keep to clean code is to create the entire thing(videodisplay and video) using as once the state is entered. I just hoped the flex framework had events to ehlp me here rather than buiilding everything on the fly in as.
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