NSTimer - Model or View Controller

Hi,
i have a doubt on correct usage of NSTimer in a MVC pattern:
let's suppose i'm building a chess game; a payer has 20 seconds to move one of his piece; a timer in view is present showing the time passing. If the time ends the player loose the time to move a piece.
In this situation how to deal with NSTimer:
I would like to put NSTimer in model since it seems to me it refers to game's logic. however doing this way my modell should know my controller in order to send recursively a message to update the "timer" (let's consider the time is a bart that becomes smaller with the time passing)
Another solution is to put the NSTimer in view: i would then be able to update my "timeBar" and i would send recursively a message to my model asking: "is the time ended?". I do not like this solution since it seems to me the NSTimer is part of logic and i may thing the performance of the solution is not high.
Could you please suggest me a correct approach?
Kind Regards
Nicolò

You could argue that your timer is currently in a view controller, not a view. If the timer controls what the user is permitted to do in the view, it might not be appropriate to put it in the model.
If you really want to put the timer in the model, the view controller could be a delegate of the model. The view controller would conform to the model's "timer" protocol by implementing delegate functions the model calls to notify the view controller of timer events.
There are some scenarios where the model should contain information about the timer. For example, if a user quits the app in the middle of a turn, when the user restarts the app does he still have the remainder of the time to move? If so, the current time value (not the timer itself) should be part of the model so serializing/deserializing the model will include enough information to resume the game in the event iOS terminates the app.

Similar Messages

How to import custom classes from model to view controller in adf?

hi...
i have some custom classes in model layer in adf.
i want to use them in view controller but i cannot import them.
how is this possible?
my jdev version is 11.1.1.5

You normally don't have to do anything special. The view controller project has a dependency to the model project. So simply typing the class name should show you hte option to generate the need import statement for the class.
However, not all classes which reside in the model project should be imported into the view Controller as it might break the MVC pattern.
Timo

Model-View-Controller implementation help

Hello, all. I'm updating an old, clunky, slow-as-molasses application to a slightly more responsive and expandable app with the help of the MVC pattern. However, I'm having a little trouble figuring out the best way to implement MVC in a Java app. Specifically, I'm not sure of the best way to get the model and two views talking to each other.
My model comes in the form of a couple manager classes that provide access to all the business data for the application. This is a relatively simple client-server app where the server can request that certain data be added or deleted, and the model responds accordingly. Similarly, scheduled tasks that run every 2 minutes can cause certain data to expire or become scheduled for display.
The model provides addXXXChangeListener methods. When a model change occurs that listeners need to know about, the model calls a notifyListeners method, and all registered listeners are notified of the change. View classes that are interested in hearing about model changes register themselves as listeners with the model and implement methods in the XXXChangeListener interface. In this way, the interaction between the model and view is almost exactly like existing interactions between event sources and listeners in Swing/AWT.
Right now, there isn't a lot of decoupling between the model and view, since the View obviously needs a reference to the model to add itself as a listener. The controller for the app sets all that up. Is this a viable way of implementing MVC in a Java app? Any suggestions or advice would be greatly appreciated.

Right now, there isn't a lot of decoupling between
the model and view, since the View obviously needs a
reference to the model to add itself as a listener.
The controller for the app sets all that up. Is
s this a viable way of implementing MVC in a Java
app? Any suggestions or advice would be greatly
appreciated.In classic MVC, the code that registers the listeners, captures the events and updates the model should be in the controller. The advantage being that you could theoretically change the view to use a different model. In reality, the view is generally (but not always) pretty specific to the model (while pieces of the model may not be) so there is little gained by doing this. The other advantage is that this can be a little cleaner and allow the controller to be 'smarter'.
If you are simply worried about coupling the vew to a specfic implementation of the model, create interfaces for the Model classes and let the Controller supply the View with references to the implmentations.

Real Model View Controller with JTextField

Hi!
I am new to Java (so please bear with me). I am building a swing application. I already have added a JTable with a corresponding table model that extends AbstractTableModel. Rather than store the data in the table model, I have modified setValueAt and getValueAt to write and read cell data to another location. So far, everything is fine. When doing setValueAt, I have a fireTableCellUpdated statement that I use to update the edited cell. So far, things are all still fine.
I would like to do the same thing with a JTextField. I found an example in Core Java Volume 1 for create a class that extends PlainDocument. It uses insertString to update the document in a way that ensures that only numbers are entered. I implemented this. Everything is still fine. I changed insertString to update my remote repository (a field in another class). Everything is still fine. Next, I tried to change (override) both getText methods to read from the repository. This works, but is not reflected on the screen.
I realize that I need the equivalent of a fireTableCellUpdated statement for the class that extends PlainDocument, but do not know how to do this.
I have looked a lot over the internet for the model view controller implementation. I know that it can be done using event and event listeners, but this seems to defeat the purpose of the model view controller - it seems like you ought to be able to directly modify the model object to access external data.
My code is below.
Thanks/Phil Troy
* PlainDocument class to make it possible to:
* - Make sure input in unsigned integer
* - Automatically save data to appropriate locate
* This will hopefully eventually work by overriding the insertString and getText methods
* and creating methods that can be overridden to get and save the numerical value
class UnsignedIntegerDocument extends PlainDocument
     TutorSchedulerPlusSettings settings;
     JTextField textField;
     public UnsignedIntegerDocument(TutorSchedulerPlusSettings settings)
     {     super();
          this.settings = settings;
     public void setTextField(JTextField textField)
     {     this.textField = textField;
     // Overridden method
     public void insertString(int offs, String str, AttributeSet a) throws BadLocationException
     {     if (str == null) return;
          String oldString = getText(0, getLength());
          String newString = oldString.substring(0, offs) + str +oldString.substring(offs);
          try
          {     setValue(Integer.parseInt(newString));
               super.insertString(offs, str, a);
               fireInsertUpdate(new DefaultDocumentEvent(offs, 10, DocumentEvent.EventType.INSERT));
          catch(NumberFormatException e)
     public String getText()
     {     return String.valueOf(getValue());
     public String getText(int offset, int length) throws BadLocationException
     {     String s = String.valueOf(getValue());
          if (length > 0)
               s = s.substring(offset, length);
          return s;
     public void getText(int offset, int length, Segment txt) throws BadLocationException
     {     //super.getText(offset, length, txt);
          char[] c = new char[10];
          String s = String.valueOf(getValue());
          s.getChars(offset, length, c, 0);
          txt = new Segment(c, 0, length);
     public String getValue()
     {     int i = settings.maxStudents;
          String s = String.valueOf(i);
          return s;
     void setValue(int i)
     {     settings.maxStudents = i;
}

Hi!
Thanks for your response. Unfortunately, based on your response, I guess that I must not have clearly communicated what I am trying to do.
I am using both JTables and JTextFields, and would like to use them both in the same way.
When using JTable, I extend an AbstractTableModel so that it refers to another data source (in a separate class), rather than one inside of the AbstractTableModel. Thus the getValueAt method, getColumnCount method, setValueAt method, . .. all call methods in another class. The details of that other class are irrelevant, but they could be accessing data from a database (via JDBC) or from other machines via some other communication mechanism.
I would like to do exactly the same thing with a JTextField. I wish for the data to come from a class other than an object of type PlainDocument, or of any class that implements the Document interface. Instead, I would like to use a class that implements the Document interface to call my external class using methods similar to those found in AbstractTableModel.
You may ask why I would like to to this. I have specific reasons here, but more generally this would be helpful when saving or retrieving parameters set and displayed in a JTextField to a database, or when sharing JTextField to multiple users located on different machines.
As to whether this is real MVC or not, I think it is but it really doesn't matter.
I know that I can accomplish what I want for the JTextField using listeners. However, I would like my code for the JTables to be similarly structured to that of the JTextField.
Thanks/Phil Troy

Update methode in model-view-controller-pattern doesn't work!

I'm writing a program in Java which contains several classes. It must be possible to produce an array random which contains Human-objects and the Humans all have a date. In the program it must be possible to set the length of the array (the number of humans to be produced) and the age of the humans. In Dutch you can see this where is written: Aantal mensen (amount of humans) and 'Maximum leeftijd' (Maximum age). Here you can find an image of the graphical user interface: http://1.bp.blogspot.com/_-b63cYMGvdM/SUb2Y62xRWI/AAAAAAAAB1A/05RLjfzUMXI/s1600-h/straightselectiondemo.JPG
The problem I get is that use the model-view-controller-pattern. So I have a model which contains several methodes and this is written in a class which inherits form Observable. One methode is observed and this method is called 'produceerRandomArray()' (This means: produce random array). This method contains the following code:
public void produceerMensArray() throws NegativeValueException{
     this.modelmens = Mens.getRandomMensen(this.getAantalMensen(), this.getOuderdom());
for (int i = 0; i < this.modelmens.length; i++) {
          System.out.println(this.modelmens.toString());
this.setChanged();
this.notifyObservers();
Notice the methods setChanged() and notifyObservers. In the MVC-patterns, these methods are used because they keep an eye on what's happening in this class. If this method is called, the Observers will notice it.
So I have a button with the text 'Genereer' as you can see on the image. If you click on the button it should generate at random an array. I wrote a controller with the following code:
package kristofvanhooymissen.sorteren;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
/**Klasse GenereerListener.
* @author Kristof Van Hooymissen
public class GenereerController implements ActionListener {
     protected StraightSelectionModel model;
     /**Constructor.
     *@param model Een instantie van het model wordt aan de constructor meegegeven.
     public GenereerController(StraightSelectionModel model) {
          this.model = model;
     /**Methode uit de interface ActionListener.
     * Bevat code om de toepassing te sluiten.
     public void actionPerformed(ActionEvent arg0) {
     this.model=new StraightSelectionModel();
     try{
     this.model.produceerMensArray();
     } catch (NegativeValueException e){
          System.out.println("U gaf een negatieve waarde in!");
     this.model.setAantalMensen((Integer)NumberSpinnerPanel.mensen.getValue());
     this.model.setOuderdom((Integer)NumberSpinnerPanel.leeftijd.getValue());
StraighSelectionModel is of course my model class. Nevermind the methods setAantalMensen and setOuderdom. They are used to set the length of the array of human-objects and their age.
Okay. If I click the button my observers will notice it because of the setChanged and notifyObservers-methods. An update-methode in a class which implements Observer.
This method contains the follow code:
public void update(Observable arg0,Object arg1){
          System.out.println("Update-methode");
          Mens[] temp=this.model.getMensArray();
          for (int i = 0; i < temp.length; i++) {
               OnbehandeldeLijst.setTextArea(temp[i].toString()+"\n");
This method should get the method out of the model-class, because the produceerRandomArray()-methode which has been called by clicking on the button will save the produce array in the model-class. The method getMensArray will put it back here in the object named temp which is an array of Mens-objects (Human-objects). Then aftwards the array should be put in the textarea of the unsorted list as you could see left on the screen on the image.
Notice that in the beginning of this method there is a System.out.println-command to print to the screen as a test that the update-method has been called.
The problem is that this update method won't work. My Observable class should notice that something happened with the setChanged() and notifyObservers()-methods, and after this the update class in the classes which implement Observer should me executed. But nothing happenens. My controllers works, the method in the model (produceerRandomArray() -- produce random array) has been executed, but my update-method won't work.
Does anyone has an explanation for this? I have to get this done for my exam an the 5th of january, so everything that could help me would be nice.
Thanks a lot,
Kristo

This was driving me nuts, I put in a larger SSD today going from a 120GB to a 240GB and blew away my Windows Partition to make the process easier to expand OS X, etc. After installing windows again the only thing in device manager that wouldn't load was the Bluetooh USB Host Controller. Tried every package in Bootcamp for version 4.0.4033 and 5.0.5033 and no luck.
Finally came across this site:
http://ron.dotsch.org/2011/11/how-to-get-bluetooth-to-work-in-parallels-windows- 7-64-bit-and-os-x-10-7-lion/
1) Basically Right click the Device in Device manager, Go to Properties, Select Details tab, Choose Hardware ids from Property Drop down.   Copy the shortest Value, his was USB\VID_05AC&PID_8218
2) Find your bootcamp drivers and under bootcamp/drivers/apple/x64 copy AppleBluetoothInstaller64 to a folder on your desktop and unzip it. I use winrar to Extract to the same folder.
3) Find the files that got extracted/unzipped and open the file with notepad called AppleBT64.inf
4) Look for the following lines:
; for Windows 7 only
[Apple.NTamd64.6.1]
; No action
; OS will load in-box driver.
Get rid of the last two lines the following:
; No action
; OS will load in-box driver.
And add this line, paste your numbers in you got earlier for USB\VID_05ac&PID_8218:
Apple Built-in Bluetooth=AppleBt, USB\VID_05ac&PID_8218
So in the end it should look like the following:
; for Windows 7 only
[Apple.NTamd64.6.1]
Apple Built-in Bluetooth=AppleBt, USB\VID_05ac&PID_8218
5) Save the changes
6) Select Update the driver for the Bluetooth device in device manager and point it to the folder with the extracted/unzipped files and it should install the Bluetooth drivers then.
Updated:
Just found this link as well that does the same thing:
http://kb.parallels.com/en/113274

Model View Controller design question

Hi,
I am creating a brand new web application, and would like to use the Model View Controller design (using Beans, JSP, and Servlets).
I am looking design suggestions for handling page forwarding. I don't want to post to a jsp, and I don't want to hard code the name of the next jsp on the forward or in the servlet. I was thinking of having a properties or xml file, which lays out the routing read by the servlet and then dispatched.
Does anyone have any other design suggestions on the best way to handle routing someone through a web application?

What you can do is create a servlet that initializes the mappings on startup...create a hashtable of mappings from a file. You'll have to parse the file, so you can either use XML and use a SAX parser, or your own format (name=path? ie. order=/order.jsp), which ever one is simpler for you to use.
To load the servlet on startup, you specify the load-on-startup parameter in the web descriptor, web.xml:
<servlet>
     <servlet-name>MappingsLoader</servlet-name>
     <servlet-class>packagename.MappingsLoader</servlet-class>
     <load-on-startup>1</load-on-startup>
</servlet>
where load-on-startup number is the order in which it loads the servlet, 1 being first.
Then once you've created the hashtable, store it in servlet context.
When you want to forward something, just use a requestdispatcher object and the hashresult to forward the request to another web component (in this case, a jsp).

WebCenter Sites and Model–view–controller (MVC) framework

A customer of our started developing their sites using Webcenter Sites, they want to support additional functionality such as transaction management, exception handling, custom logging and so on. I was wondering if anyone has experience with the Model–view–controller (MVC) framework, they consider it an ideal candidate for these features. Has anyone here used the MVC framework in conjunction with WebCenter Sites to write additional java classes, facade layers and utilize the Spring controller to wire the same ? Are you aware of any other options available for this purpose ?
regards,
Pietro

Hi Pietro -
Using Sites IN a MVC framework is very difficult, because the entire context of WebCenter Sites is burned into the COM.FutureTense.Servlet.SContentServer servlet. You can't really work around that with any degree of reliability. Unfortunately, that means that dropping Sites into a pre-existing third party MVC framework doesn't really work.
There are a lot of good reasons for that, not the least of which is the two-tiered pagelet-level caching system that makes Sites so very fast at delivery... not that it's any consolation.
To deal with this some former colleagues of mine and I built the GST Site Foundation ("GSF") framework, which provides a Spring-like MVC container WITHIN sites, instead of the other way around. If you're familiar with Spring, you'll see patterns similar with the GSF. My current team and I have blogged about this extensively:
What is this whole GST Site Foundation thing? | Function1
Create a Simple "Contact Us" Form with GSF | Function1
How to Add Your Own DAO to the GSF Actions | Function1
The full stream is here: GSF | Function1
But ultimately, the special sauce is the following: in Sites, create an XML element that contains nothing but a <FTCS> tag, a <CALLJAVA> tag, and a closing </FTCS> tag. Your CALLJAVA will then call a class that implements the Seed or Seed2 interface, and from in there you have access to the (properly managed) ICS object where you can do all of your magic. You can then build a lightweight controller here to handle any action you can dream up:
https://github.com/dolfdijkstra/gst-foundation/blob/master/gsf-wra/src/main/java/com/fatwire/gst/foundation/controller/A…
Let me know if I can help!
Regards,
Tony

Call method with an argument from another view controller

I have a UIViewController MainViewController that brings up a modal view that is of the class AddPlayerViewController. When the user clicks 'Save' in the modal view I need to pass the Player data (which is a Player class) from the modal view to the MainViewController in addition to triggering a method in the MainViewController. What's the best way to accomplish this? I'm new to cocoa and have only tried using delegates and some ugly hacks to no avail.
Thanks for the help.

If I understand correctly, you have:
1. A model object, Player.
2. A top view controller, MainViewController.
3. Another view controller, AddPlayerViewController, which MainViewController displays modally.
I'm guessing that AddPlayerViewController creates a new Player object and lets the user set its values, and you need a way to get that new Player into MainViewController once they're done.
So, here's what I'd do:
1. Create an AddPlayerViewControllerDelegate protocol. It should declare two methods, "- (void)addPlayerViewController:(AddPlayerViewContrller*)controller didAddPlayer:(Player*)newPlayer" and "- (void)addPlayerViewControllerNotAddingPlayer:(AddPlayerViewController*)controll er".
2. Add an attribute of type "id <AddPlayerViewControllerDelegate>" called delegate to AddPlayerViewController. Also add a property with "@property (assign)" and "@synthesize".
3. Modify AddPlayerViewController so that if you click the "Save" button, addPlayerViewController:didAddPlayer: gets called, passing "self" and the new Player object as the two arguments. Also arrange for clicking the "Cancel" button to call addPlayerViewControllerNotAddingPlayer:.
4. Modify MainViewController to declare that it conforms to AddPlayerViewControllerDelegate. Implement those two methods (addPlayerViewControllerNotAddingPlayer: might be an empty method if you don't want to do anything).
5. When you create your AddPlayerViewController, set its delegate to your MainViewController.
If you need more detail, let me know what parts you need me to elaborate on.

Question about view/controller/nib class design

Assume you need to make an application with, let's say, 15 different views in total. There are two extreme design choices you can use to implement the app:
1) Every single view has its own view controller and a nib file. Thus you end up with 15 controller classes and 15 nib files (and possibly a bunch of view classes if any of your views needs to be somehow specialized).
2) You have only one controller which manages all the views, and one nib file from which they are loaded.
AFAIK Apple and many books recommend going purely with option #1. However, going with this often results in needless complexity, large amounts of classes (and nib files) to be managed and complicated class dependencies, especially if some of the views (and thus their controllers) interact with each other or share something (something which would be greatly simplified if all these related views were handled by one single controller class).
Option #2 also usually ends up being very complex. The major problem is that the single controller will often end up being enormous, handling tons of different (and usually unrelated) things (which is just outright bad design). This is seldom a good design, unless your application consists of only a few views which are closely related to each other (and thus it makes sense for one single controller class to handle them).
(Option #2 also breaks the strictest interpretation of the MVC pattern, but that's not really something I'm concerned about. I'm concerned about simple design, not about following a programming pattern to the letter.)
A design somewhere in between the two extremes often seems to be the best approach. However, since I don't have decades of Cocoa programming experience, I would like to hear some opinions about this subject matter from people with more experience on that subject. (I do have object-oriented programming experience, but I have only relatively recently started programming for the iPhone and thus Cocoa and its design patterns are relatively new to me, so I'm still learning.)

Somehow I get the feeling that my question was slightly misunderstood.
I was not asking "which one of these two designs do you think is better, option #1 or option #2?" I already said in my original post that option #2 is bad design (unless your application consists of just one or two views). That's not the issue.
The issue is that from my own experience trying to adhere very strictly to the "every single view must have its own view controller and nib file" often results in needless complexity. Of course this is not always the case, but sometimes you end up having controller classes which perform very similar, if not even the exact same actions, resulting in code repetition. (An OO'ish solution to this problem would be to have a common base class for these view controllers where the common functionality has been grouped, but this often just adds to the overall complexity of the class hierarchy rather than alleviating it.)
As an example, let's assume that you have a set of help screens (for example one help screen for each major feature of the app) and a view where you can select which help view to show. Every one of these views has, for example, a button to immediately exit the help system. If you had one single controller class managing these views, this becomes simpler: The controller can switch between any of the views and the buttons of each view (most of them doing the same things) can call back actions on this controller (eg. to return to the help selection or to exit the help screen completely). These help screens don't necessarily have any functionality of their own, so it's questionable what do they would need view controllers of their own. These view controllers would basically be empty because there's nothing special for them to do.
View controllers might make it easy to use the navigation controller class, but the navigation controller is suitable mainly for utility apps but often not for things like games. (And if you need animated transitions between views, that can be implemented using the UIView animation features.)
I also have hard time seeing the advantages of adhering strictly to the MVC pattern. The MVC pattern is useful in things like web servers, where MVC adds flexibility. The controller acts as a mediator between the database and the user interface, and it does so in such an abstract way that either one can be easily changed (eg. the "view", which normally outputs HTML, could be easily changed to a different "view" which outputs a PDF or even plain text, all this without having to touch the controller or the model at all). However, I'm not seeing the advantages of the MVC pattern in an iPhone app. It provides a type of class design, but why is it better than some other class design? It's not like the input and output formats of the app need to be changed on the fly (which is one advantage of a well-designed program using the MVC pattern).

Multithreading and static of wdDoModifyView in a view controller

wdDoModifyView javadoc recommends to use a static variable of view controller (VC) to pass/publish a references of UI elements to event handlers of VC.
it means then that different instances of VC serving different users share same static variable... i see here a problem, do not you?

Armin Reichert: see TJA311 WebDynpro Part 1 Unit 10, example optional 1 solution 6-3,6-4 -))
my new conclusion is that any UI elements should only be access in wdDoModifyView method
the javadoc discourage from using instance fields not static fields but recommends not to use UIs outside of the method:
Hook method called to modify a view just before rendering.
This method conceptually belongs to the view itself, not to the
controller (cf. MVC pattern).
It is made static to discourage a way of programming that
routinely stores references to UI elements in instance fields
for access by the view controller's event handlers, and so on.
The Web Dynpro programming model recommends that UI elements can
only be accessed by code executed within the call to this hook method.

Passing field values from View Controller to Custom Controller

Hi Experts,
I am working on a customer requirment in which customer want to see the values of field from one view in another view. The Context node & Context node attribute are the same in both the views.
I am aware that we need to pass the field values from view controller to custom controller in order to see the field in the subsequent view. I would like to kow how i can achieve that technically?
Kindly let me your valueable suggesions.
Best Regards,
Prabahar

Hi Carsten,
Thank you for the detailed feedback.
I want the fields ID_TYPE & ID_TYPE_DESCRIPTION from IUICMD/SearchAccount to be available in IUICMD/DetailAccount. I have created a context node u201CSEARCHu201D in view IUICMD/DetailAccount. I have created the context node with out choosing u201CCreate with Instanceu201D. This Context node (SEARCH) is already available in IUICMD/SearchAccount as part of the standard.
Below given is contents of the Method CREATE_SEARCH of my context class ZL_IUICMD_DETAILACCOUNT_CTXT of view IUICMD/DetailAccount, which is created by the Wizard during enhancement.
method CREATE_SEARCH.
    DATA:
      model        TYPE REF TO if_bsp_model,
      coll_wrapper TYPE REF TO cl_bsp_wd_collection_wrapper,
      entity       TYPE REF TO cl_crm_bol_entity,    "#EC *
      entity_col   TYPE REF TO if_bol_entity_col.    "#EC *
    model = owner->create_model(
        class_name     = 'ZL_IUICMD_DETAILACCOUNT_CN00'
        model_id       = 'SEARCH' ). "#EC NOTEXT
    SEARCH ?= model.
    CLEAR model.
bind to custom controller
owner->do_context_node_binding(
           iv_controller_type = CL_BSP_WD_CONTROLLER=>CO_TYPE_CUSTOM
           iv_name = 'IUICMD/CuCoMD' "#EC NOTEXT
           iv_target_node_name = 'BUILHEADERSEARCH'
           iv_node_2_bind = SEARCH ).
endmethod.
I have enhanced the Custom Controller. Now it have new implementation class u201CZL_IUICMD_CUCOMD_IMPLu201D
Let me know where I am doing mistake
Thanks in advance
Best Regards,
Prabahar
Edited by: Prabahar Raju on Sep 2, 2009 10:47 AM
Edited by: Prabahar Raju on Sep 2, 2009 10:52 AM

Data Controls Missing From View Controller Tab

Good Afternoon,
I have researched for hours over the internet and this forum but have not found an answer. My problem is this:
I am using JDeveloper Studio Edition Version 11.1.2.1.0. In my ViewController project no Data Controls are displayed in the Data Controls tab. No matter what I do they are not coming back. I have refreshed, closed, and re-deployed multiple times (As well as multiple other attempts!). I also checked the DataBindings.cpx file. I have been having this problem for DAYS.
When I try to run my page I get the following exception:
Error processing viewId: /home URI: /WEB-INF/pages/home.jspx actual-URI: /fragments/myTask/myTaskEdit.jsff.
oracle.jbo.NoObjException: JBO-25003: Object TaskAMDataControl of type DataControl is not found.
Does anyone know what to do to have the DataControls display in the Data Controls tab of the View Controller again?
Kind Regards
n0vice

n0vice, is the model project holding the TaskAMDataControl part of the same workspace?
If yes, open the viewControllers project properties and select the 'dependencies' node. There you should see the model jpr file in the 'dependend projects or archives' section. If not click the pencil and add it.
Timo

ADF View Controller - Page Transitions

Hi All,
Definitley releveant here - JSF 2.0 / Jdev 11.1.2
This one may be considered a little left of filed, but has anyone out their played around or implemented view controller transitions? Depending upon the network speed, with a lot of my pages, I can see the components rendering and loading. This is especially true with tables set with auto-height-rows not equal to -1.
Just to be clear, some other front-end only frameworks give you the ability to slide or fade into the new page, once this is entirely loaded into the DOM.
My educated guess is that this would involve some sort of View Model Layer extension, however I am guessing that this may be one of the areas that not many developers have attempted to tackle. Nothing on google so far - that or my search terms are way off.
Even if someone could provide some psuedo logic into how this theortetically would be achieved. From my experience in ADF, I have realised that the framework is very extensible, and being open source, could support this requirement.
Cheers,
Simo
Edited by: Simo on Jun 19, 2012 11:51 PM
Edited by: Simo on Jun 19, 2012 11:52 PM
Edited by: Simo on Jun 19, 2012 11:55 PM

Simo,
you may want to try partial page navigation as documented here http://docs.oracle.com/cd/E23943_01/web.1111/b31973/ap_config.htm#sthref409to speed page transition.
I don't think that open source is a guarantee for animated transition(and ADF is not open source) as otherwise we would see that e.g. in Trinidad MyFaces or other open source JSF frameworks. Instead what we do is to work on reducing the page content size and the supplement CSS and JS file downloads (You will see improvements when JDeveloper 12c goes out) . Other strategies for faster page load and response include the use of page templates and ADF regions. So unless you need transition for a visual effect I am not quite sure I want to follow that adding transition animation is a way to improve the use experience in regards to performance
Frank

Coupling between component controller and view controller

Hello,
I have seen some discussions in this forum regarding the possibilities of calling / triggering a view controllers's method from a component controller's method; obviously the Web Dynpro framework only provides for the other direction (view ctrl -> comp ctrl) via handle <i>wd_comp_controller</i>.
Some people proposed raising events in the comp controller and catching these in the view controller, others pointed out that any dependance of a view controller on a component controller would violate MVC principles.
Now, I can't see why a tighter coupling (in both ways) between controllers within one component would harm MVC in any way. So I suggest to "register" a view controller in the pertaining component controller if necessary:
this_controller = wd_this->wd_get_api( ).
wd_comp_controller->register_view_ctrl_XYZ( this_controller ).
This way the component controller can save the reference and later call any method on it. What do you think, does anything argue against this practice?
Regards,
Sebastian

Hi Sebastian,
I wouldn't try to explain whether it is violating the MVC principles or not.
Can you please explain how to call methods of view using the view controller?
have you tried using an example???
I want to give a small example which I think is a basic disadvantage of calling View methods from component controller.
Suppose I have 30 methods in a view and such 7 views in a component (I think this is a very common example).
Till now one is very clear that if I have a method in view, it will be called at maximum by other methods with in the view. That means at any point of time, my search is limited to 30 methods.
Now if component controller can also call my search will become horrible and spread to 210 methods, unless otherwise, you are very good at naming attributes and wont make the mistake of assigning attributes wrongly.
Imagine the effort if the outside components also access these methods through interface.
Also I dont think that the webdynpro phase model can support this way of calling view methods. You might be successful once, but then you are trying to open a can of worms.
This is my way of thinking...
Also, it would be great if you can tell me whether you are successful in calling views methods or not???
Thanks,
Anand

How to access AppModule methods into View Controller project

Hi,
I've created AppModule in model project and now I want to use that AppModule methods into viewcontroller project without creating the webservice proxy.
Thanks in advance,
Rohit

Hi,
I am using Jdeveloper 11.1.1.4.0.
To use the appModules methods, I am creating the service interface and then I am creating the webservice proxy into another view controller project and access the appModule methods.
Now, I don't want to create the webservice proxy. I want to directly access the appModule methods.
Thanks,
Rohit.

NSTimer - Model or View Controller

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