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• World orientation in OpenGLES clarification

  - by Dev2rights

  I have a 3d tile map made up of individual billboards in OpenGLES. Each is a 2 triangles mesh and has a 3D Vector to determine its position and another defining its rotation from the origin at (0,0,0). Im trying to work out how to rotate the entire tile map around a point be that the origin or some arbitrary point in space. Im guessing i need to set up a Model Matrix instead for each tile. Then set up a world matrix for the world. Then on updating i would translate the world matrix and change the orientation and multiply it with each model matrix before rendering. Is this correct ?

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• UIViewController programmatically vs Interface Builder

  - by alexey

  I have a custom UIViewController and a corresponding view in a nib file. The view is added to the UIWindow directly. [window addSubview:customViewController.view]; Sizes of the window and the view are default (480x320 and 460x320 correspondingly). When I create CustomViewController inside the nib file and check "Resize View From NIB" in IB Attributes tab everything works just fine. But when I create CustomViewController programmmatically with initWithNibName message the view is not positioned on the window correctly. There is an empty stripe at the bottom. Its height is 20px. I see it's because of status bar offset. IB handles that with "Resize View From NIB". How to emulate that programmatically?

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• Image not showing in UIImageView in Interface Builder / iPhone

  - by dbonneville

  I have a UIView with an UIImageView dragged onto the view. All of a sudden, for all my xibs, the image no longer shows up. There is a blue X. However, when it builds, the image is there. At one point, I deleted and regenerated all my images and moved some into a subfolder in XCode. Normally, when you go to select an image for an UIImageView, IB allows you to pick from any image in the project. But, I can't see any of the images I had put in the folder anymore in the dropdown. All I see in the dropdown on the Inspector is the one image I want, but that is also the one that is not showing up. And like I said, if I build it on the device or simulator, it all works. There is some cache or something screwed up somewhere. Everything builds with no errors. I cleared the caches and rebuilt. It all works. No error or warnings. But...I can't see any other images and IB still thinks it's missing the image that is clearly selected in the dropdown. So how do I get XCode and IB back on track and see what assets it properly should be seeing in the XIBs?

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• Fluent interface design and code smell

  - by Jiho Han

  public class StepClause { public NamedStepClause Action1() {} public NamedStepClause Action2() {} } public class NamedStepClause : StepClause { public StepClause Step(string name) {} } Basically, I want to be able to do something like this: var workflow = new Workflow().Configure() .Action1() .Step("abc").Action2() .Action2() .Step("def").Action1(); So, some "steps" are named and some are not. The thing I do not like is that the StepClause has knowledge of its derived class NamedStepClause. I tried a couple of things to make this sit better with me. I tried to move things out to interfaces but then the problem just moved from the concrete to the interfaces - INamedStepClause still need to derive from IStepClause and IStepClause needs to return INamedStepClause to be able to call Step(). I could also make Step() part of a completely separate type. Then we do not have this problem and we'd have: var workflow = new Workflow().Configure() .Step().Action1() .Step("abc").Action2() .Step().Action2() .Step("def").Action1(); Which is ok but I'd like to make the step-naming optional if possible. I found this other post on SO here which looks interesting and promising. What are your opinions? I'd think the original solution is completely unacceptable or is it? By the way, those action methods will take predicates and functors and I don't think I want to take an additional parameter for naming the step there. The point of it all is, for me, is to only define these action methods in one place and one place only. So the solutions from the referenced link using generics and extension methods seem to be the best approaches so far.

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• WordNet Java Interface

  - by rookie

  Hi all I need to use WordNet with Java. Can anyone point me to some useful resources? Thanks in advance

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• How to get actual type of an derived class from its parent interface

  - by Tarik

  Hello people, Lets say we have a code portion like this : IProduct product = ProductCreator.CreateProduct(); //Factory Method we have here SellThisProduct(product); //... private void SellThisProduct(IProduct product) { //..do something here } //... internal class Soda : IProduct {} internal class Book : IProduct {} How can I infer which product is actually passed into SellThisProduct() method in the method? I think if I say GetType() or something it will probably return the IProduct type. Thanks...

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• Interface Builder: Resize View From NIB

  - by alexey

  I have a custom UIViewController and a corresponding view in a nib file. The view is added to the UIWindow directly. [window addSubview:customViewController.view]; Sizes of the window and the view are default (480x320 and 460x320 correspondingly). When I create CustomViewController inside the nib file and check "Resize View From NIB" in IB Attributes tab everything works just fine. But when I create CustomViewController programmmatically with initWithNibName message the view is not positioned on the window correctly. There is an empty stripe at the bottom. Its height is 20px. I see it's because of status bar offset. IB handles that with "Resize View From NIB". How to emulate that programmatically? It seems that IB uses some custom subclass of UIViewController. So the question: how is "Resize View From NIB" implemented there?

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• How to change to a grouped table view in xcode without using Interface Builder

  - by Dave

  I have a table that I created within xcode so there is no nib file in this case. I want to make my table into the 'Grouped' style but im not sure how. I think it has somthing to do with the method below, the problem is Im not really sure how to call it, I do understand how methods work I'm just not too sure on where to start with this one: - (id)initWithFrame:(CGRect)frame style:(UITableViewStyle)UITableViewStyleGrouped So could someone tell me how to call it? The problem is that its not a method I wrote its a built in one so I could put that line into my header file but how would I use it in my implementation file? Thanks guys,

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• Can't change UITableViewCell size in Interface Builder

  - by Ondrej

  Does anyone have the same problem as I do? ... I've upgraded to the iPhone SDK 3.2 and I am unable to resize UITableViewCell object in my XIB file (usually I've been just resizing the view but now the cell has the same size and there is just a grey are around) ... btw, I've tried to reinstall twice including one deep reinstall.

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• iPhone SDK: Interface Builder label font, only shows when editing label

  - by Nic Hubbard

  I have tried this on a few installations of the 3.1.3 SDK. When I add a label to my view, I would like to change the font to something like Futura. I know how to change the font, but, for some reason, it does not show that it is changed. ONLY when I edit the label by double clicking, do I see my new font. And, this is the only time that I do get to see the new font, is when editing the label. Why does this happen? How can I change the font of my labels, and have it show up? Why would I care to have the font changed when I edit the label?!

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• Build xib Interface Builder and load them as subview in iphone

  - by Leonardo

  Hi all, what I would like to know if it's possible to build a view and its correspondent xib file. Then, in a generic controller, load this view programmatically and add as a subview to the current view. This subview should act as a generic info box which can be loaded by many controller. thanks Leonardo

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• Set an Interface Builder created element's state programatically

  - by mvexel

  I have a couple of UISwitch elements in a view controller that is presented modally in my iPhone app. I set up the view in IB. I want these UISwitch elements to reflect the current values in my [NSUserDefaults standardUserDefaults] where I store the appropriate BOOLs. I thought this would do the trick setting the switches to the right state, but no: -(void)viewWillAppear:(BOOL)animated { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [backgroundSwitch setOn:[defaults boolForKey:kTrackInBackgroundKey] animated:NO]; [batterySaveSwitch setOn:[defaults boolForKey:kBatterySaveKey] animated:NO]; } The backgroundSwitch and batterySaveSwitch are declared as properties for the view controller class. They are not initialized; that does not seem to make a difference. I did check the values coming out of the NSUserDefaults dictionary. The method is being called at the right time.

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• Align UItextFields one below the other in interface builder

  - by Dave

  How to align 2 textfields one below the other in a tool bar and display a button on the left side (or right side) in the vertical middle of those two fields? Please see the image to know what I am talking about. http://developer.apple.com/iphone/library/documentation/userexperience/conceptual/mobilehig/art/ui_textfields.jpg

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• Interface Builder warnings

  - by Biranchi

  Hi all, I am getting an warning while building my source code as follows: /* com.apple.ibtool.document.warnings */ /Users/biranchi/Desktop/Hotlist v2.0/Classes/HLCheckinViewController.xib:6: warning: The separator style "Single Line Etched" is not supported on iPhone OS versions prior to 3.2. What is this error due to ? Thanks

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• method names with fluent interface

  - by deamon

  I have a Permissions class with methods in fluent style like this: somePermissions.setRead(true).setWrite(false).setExecute(true) The question is, whether I should name these methods set{Property} or only {property}. The latter would look like this: somePermissions.read(true).write(false).execute(true) If I look at these methods separately I would expect that read reads something, but on the other hand it is closer to the intention to have something like named paramaters like in Scala: Permission(read=true, write=false, execute=true)

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• seperating interface and implemention with normal functions

  - by ace

  this seems like it should be pretty simple, im probably leaving something simple out. this is the code im trying to run. it is 3 files, 2*cpp and 1*header. -------------lab6.h ifndef LAB6_H_INCLUDED define LAB6_H_INCLUDED int const arraySize = 10; int array1[arraySize]; int array2[arraySize]; void generateArray(int[], int ); void displayArray(int[], int[], int ); void reverseOrder(int [],int [], int); endif // LAB6_H_INCLUDED -----------------lab6.cpp include using std::cout; using std::endl; include using std::rand; using std::srand; include using std::time; include using std::setw; include "lab6.h" void generateArray(int array1[], int arraySize) { srand(time(0)); for (int i=0; i<10; i++) { array1[i]=(rand()%10); } } void displayArray(int array1[], int array2[], int arraySize) { cout<<endl<<"Array 1"<<endl; for (int i=0; i<arraySize; i++) { cout<<array1[i]<<", "; } cout<<endl<<"Array 2"<<endl; for (int i=0; i<arraySize; i++) { cout<<array2[i]<<", "; } } void reverseOrder(int array1[],int array2[], int arraySize) { for (int i=0, j=arraySize-1; i<arraySize;j--, i++) { array2[j] = array1[i]; } } ------------and finally main.cpp include "lab6.h" int main() { generateArray(array1, arraySize); reverseOrder(array1, array2, arraySize); displayArray(array1, array2, arraySize); return 0; }

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• Interface Builder caching bad data (voodoo)

  - by Ryan Townshend

  Sometimes IB will hold onto old or bad references, and I cannot seem to remove or edit them. EDIT I have made this a wiki question with the intention of gathering more data on the phenomenon. Answers involving situations where other coders have encountered this are welcome. This happened to me again last night with a table controller. When I created a spike project to try and reproduce the error, the system worked the way I anticipated. Then back in the actual project the bad behavior continued, even if I remove the xib file and all controllers involved. Creating a whole new project with none of the original (problematic) xib and nib files worked correctly. This question is not about the specifics of this incident but about this type of incident in IB. Does anyone know more about this type of bad IB behaviour, and possibly a more stylish way to to eliminate it than nuking the project? Note, removing the offending IB files and recreating them in the same project has not solved this for me in the past, only whole new projects. Answers regarding examples of when/how this glitch has been observed/created are welcome as well.

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• Interface builder background color => clear color ?

  - by jchatard

  I've setup some background colors for my Labels in order to position them. Now that they are well in place, I vould like to reset their background color to none, or clearColor. But I don't find any way to achieve this in IB, I don't gind any "no color" color... Any way to do this without re-coding color at runtime? Thanks, Jérémy

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• Looking for a virtual network adapter (virtual interface controller)

  - by Dawn

  I need a software that simulates a network adapter. I need the virtual adapters will be able to communicate with each other. For example, if I i have 2 virtual adapter (on the same computer): interface1-1.1.1.1 and interface2-1.1.1.2. I want the packets that will be send through interface1 will be received in interface2. I have as an option to install VMWare server, but i prefer something more specific. anyone have ideas?

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• Invoke private method with interface as argument

  - by Stephanie

  Hi, I've been attempting to invoke a private method whose argument is a parameter and I can't quite seem to get it right. Here's kind of how the code looks so far: public class TestClass { public TestClass(){ } private void simpleMethod( Map<String, Integer> testMap) { //code logic } } Then I attempt to use this to invoke the private method: //Hashmap Map <String, Integer> testMap = new HashMap <String, Integer>(); //method I want to invoke Method simpleMethod = TestClass.class.getDeclaredMethod("simpleMethod", Map.class); simpleMethod.setAccessible(true); simpleMethod.invoke(testClassObject, testMap); //Throws an IllegalArgumentException As you can see, it throws an IllegalArgumentException. I've attempted to cast the hashmap back to a map, but that didn't work. What am I doing wrong?

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• Open-source generic web service to database interface?

  - by Joe Strout

  I'm looking for a thin, generic layer (probably written in PHP) that sits between a database (probably MySQL) and web service clients (which could be anything). I imagine there would be config files of some sort that tell it how to map web service requests to database queries (or other DB commands). It would also need to handle authentication and authorization, of course. I've done some googling but failed to find anything that fits the bill. Can anyone suggest something like this?

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• Delphi memory management design strategies : Object or Interface ?

  - by Pierre-Jean Coudert

  Regarding Delphi memory management, what are your design strategies ? What are the use cases where you prefer to create and release Objects manually ? What are the uses cases where Interfaces, InterfacedObjects, and their reference counting mechanism will be prefered ? Do you have identified some traps or difficulties with reference counted objects ? Thanks for sharing your experience here.

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• Interface Builder Does Not Recognize Toolbar Buttons

  - by Sheehan Alam

  I created 4 UIButton's that are Custom and Plain in IB. I added a background image to them and then placed them onto my UIToolbar. I created IBActions and hooked up all of the buttons I did not create @property for the buttons, but 3/4 of them appear on my toolbar and they work. Why isnt my 4th button appearing? If I need to declare an @property for them, will it be a UIToolbarButtonItem or a UIButton?

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• How to get iPhone, not iPad view in Interface Builder

  - by dbonneville

  At first, I was not able to build a new blank project to iPhone using the new XCode 3.2 beta. I edited the project settings and was able to build the blank app to iPhone simulator. However, when I open the nib for the project in IB and click the view, it opens an iPad size view. How do I get the right sized view to work on in IB?

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• WCF reuse types in referenced assemblies does not reuse the ServiceContract Interface

  - by Matt

  I have three seperate projects: -MyUserControl (Needs a reference to a service implementing IMyService) -MyService (Implements IMyService) -MySharedInterfaces (IMyUserControl and IMyService) -MyWebApp The user control needs to be dynamically loaded at runtime. This implements IMyUserControl and has a property of type IMyService which will be set at runtime. The trouble is even with the option to reuse types the WebApp isn't reusing the IMyServiceType, it always generates it again from the Service Reference. This wouldn't be an issue if I could cast it to MySharedInterfaces.IMyService (which I can't understand, since it should be exactly the same). The user control is expecting something of type IMyService, is there anyway to either cast the WebServiceReference.IMyService back to MySharedInterface.IMyServiceReference or force the WebServiceReference to reuse the MySharedInterface.IMyServiceReference? Thanks

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