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• MVC: Nested Views, and Controllers (for a website)

  - by incrediman

  I'm doing a PHP website using the MVC pattern. I am not using a framework as the site is fairly simple and I feel that this will give me a good opportunity to learn about the pattern directly. I have a couple questions. Question 1: How should I organize my views? I'm thinking of having a Page view which will have the header and footer, and which will allow for a Content view to be nested between them. Question 2: If I have 5 Content pages, should I make 5 different views that can be used as the content that is nested within the Page view? Or, should I make them all extend an abstract view called AbstractContent? Question 3: What about controllers? I think there should be one main controller at least. But then where does the request go from there? To another controller? Or should I just call the Page view and leave it at that? I thought that controllers were supposed to handle input, possibly modify a model, and select a view. But what if one of the views nested within the view that a controller calls requires additional input to be parsed? Question 4: Are controllers allowed to pass parameters into the view? Or should the controller simply modify the model, which will then affect the view? Or is the model only for DB access and other such things?

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• Creating an Android View with a particular style programmatically

  - by Casebash

  How can I create a view with a particular style programmatically (not in XML)? I tried using this [View (Context context, AttributeSet attrs, int defStyle)][1], but I don't know what to parse in for the second argument. Passing in null results in the View not being displayed [1]: http://developer.android.com/reference/android/view/View.html#View(android.content.Context, android.util.AttributeSet, int)

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• Is it possible to make a non-nullable column nullable when used in a view? (sql server)

  - by Matt

  Hi, To start off I have two tables, PersonNames and PersonNameVariations. When a name is searched, it finds the closest name to one of the ones available in PersonNames and records it in the PersonNameVariations table if it's not already in there. I am using a stored proc to search the PersonNames for a passed in PersonNameVariationand return the information on both the PersonName found and the PersonNameVariation that was compared to it. Since I am using the Entity Framework, I needed return a complex type in the Import Function but for some reason it says my current framework doesn't support it. My last option was to use an Entity to return in my stored proc instead. The result that I needed back is the information on both the PersonName that was found and the PersonNameVariation that was recorded. Since I cannot return both entities, I created a view PersonSearchVariationInfo and added it into my Entity Framework in order to use it as the entity to return. The problem is that the search will not always return a Person Name match. It needs to be able to return only the PersonNameVariation data in some cases, meaning that all the fields in the PersonSearchVariationInfo pertaining to PersonName need to be nullable. How can I take my view and make some of the fields nullable? When I do it directly in the Entity Framework I get a mapping error: Error 4 Error 3031: Problem in mapping fragments starting at line 1202:Non-nullable column myproject_vw_PersonSearchVariationInfo.DateAdded in table myproject_vw_PersonSearchVariationInfo is mapped to a nullable entity property. C:\Users\Administrator\Documents\Visual Studio 2010\Projects\MyProject\MyProject.Domain\EntityFramework\MyProjectDBEntities.edmx 1203 15 MyProject.Domain Anyone have any ideas? Thanks, Matt

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• UINavigationController inside UINavigationController view issue

  - by HurkNburkS

  I have two navigationcontrollers a main one and a sub one. The sub one is displaying inside the main one, which I am also hiding its navigationbar. as a result I am having some weird issues (things inside the view are being pushed down exactly the height of the navigationbar i am hiding) with the stuff I am displaying on the inside of the sub navigationcontroller. it looks like this. The left view is what I am doing in interface builder and the resulting view in the simulator. any help would be greatly appreciated. UPDATE: Here is the view with the subnav bar turned on so you can see the structure of my view. and here is the same view with the subnav turned off... can you see how the A is still sitting lower than it should be.. wel I think its because of the main navbar now as the whole subnavbar sits inside this view.. Last update that shows whats missing from the view

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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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• View controllers inside tab bar controller not auto-resizing on rotation

  - by Padawan

  (Correction: the view controllers are not auto-resizing instead of not auto-rotating.) In an iPad app, I have five regular view controllers (not navigation controllers or anything like that) inside a tab bar controller. The tab bar controller is just a plain UITabBarController declared in the app delegate. All the view controllers return YES in the shouldAutorotateToInterfaceOrientation method. On both the simulator and device, on rotation, the tab bar and the current view controller rotate but the currently selected view controller (call it A) does not resize properly. It keeps its portrait width and height (but it is rotated). If I switch to another view controller B and then back to A (without rotating the device again), A appears correctly resized. This happens with any of the five view controllers Why doesn't the currently selected view controller resize immediately on rotation and how do I fix it? Thanks.

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• How to load static files from view HTML in web2py?

  - by MikeWyatt

  Given a view with layout, how can I load static files (CSS and JS, essentially) into the <head> from the view file? layout.html <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="{{=T.accepted_language or 'en'}}"> <head> <title>{{=response.title or request.application}}</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <!-- include requires CSS files {{response.files.append(URL(request.application,'static','base.css'))}} {{response.files.append(URL(request.application,'static','ez-plug-min.css'))}} --> {{include 'web2py_ajax.html'}} </head> <body> {{include}} </body> </html> myview.html {{extend 'layout.html'}} {{response.files.append(URL(r=request,c='static',f='myview.css'))}} <h1>Some header</h1> <div> some content </div> In the above example, the "myview.css" file is either ignored by web2py or stripped out by the browser. So what is the best way to load page-specific files like this CSS file? I'd rather not stuff all my static files into my layout.

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• GWT, MVP, and UIBinding - How to get the best of all worlds

  - by Stephane Grenier

  With MVP, you normally bind the View (UI) with the Presenter in the Presenter. However with the latest version of GWT, especially with UIBinding, you can do the following in the View: @UiHandler("loginButton") void onAboutClicked(ClickEvent event) { // my login code } Which basically exchanges a lot of anonymous inner class code for some quick annotation code. Very nice!! The problem is that this code is in the view and not the presenter... So I thought maybe: @UiHandler("loginButton") void onAboutClicked(ClickEvent event) { myPresenter.onAboutClicked(...); } But there are several problems with this approach. The most important, you blur the lines between View and Presenter. Who does which binding, in some cases it's the View, in others it's the presenter (binding to events not in your current view but that need to be attached - for example a system wide update event). You still get the benefit of being able to unit test your presenter, but at what cost. The responsibilities are messy now. For example the binding is sometimes in the View and others times in the Presenter level. I can see the code falling into all kinds of chaos with time. I also thought of extending the Presenter to the View, so that you could do this in the View. The problem here is that you lose the Presenter's ability to run standard unit tests! That's a major issue. That and the lines again become blurred. So my question, does anyone have a good method of taking advantage of the annotation from UIBinding within the MVP pattern without blurring the lines and losing the advantages of the MVP pattern?

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• Navigation Controller Views in Landscape

  - by Mahadevan S

  Hi, I have set up a navigation controller ( navController ) in Portrait mode to which I push all the viewcontrollers I have. Now when a user switches to Landscape mode, I need to display all the views as a coverflow. For this I use [navController viewControllers] to get all the view controllers in the stack. In the Landscape view controller NSArray * arr = [navController viewControllers]; self.view = [arr objectAtIndex:0]; [arr objectAtIndex:0]; returns the correct view ( the bottombost viewcontroller's view in the nav stack ). My problem is these views never get displayed ie the views extracted from the navController never gets displayed. If i try to create a new view and insert all the subviews of a view, it gets displayed. eg : UIView * newView = [[UIView alloc] init]; for (UIView *subView in [arr objectAtIndex:0]) [newView addSubView:subView]; self.view = newView; The above piece of code works. But simply adding the view doesnt seem to work.. Can anyone explain the solution? Many thanks

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• Resize view on iPhone when rotating

  - by BCBomb47

  I have an application with many views. I want only a couple of the views to be able to rotate to landscape when the device is rotated. I found out that I couldn't use (BOOL)shouldAutorotateToInterfaceOrientation because that would rotate every view in my app. I found a solution to this problem here on Stack Overflow but now I have another issue to deal with. The view rotates when I turn the device but it still shows the view as if it were still in portrait mode (straight up and down). The top and bottom of the view is cut off. Is there a way to have the view rotate and also adjust its size to fit the new orientation? I also found this but wasn't able to get it to work. Here's my code for that view: @implementation businessBank @synthesize webView, activityIndicator; - (void)viewDidLoad { [super viewDidLoad]; NSString *urlAddress = @"website_url"; NSURL *url = [NSURL URLWithString:urlAddress]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; [webView loadRequest:requestObj]; [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didRotate:) name:UIDeviceOrientationDidChangeNotification object:nil]; } - (void)didRotate:(NSNotification *)notification { UIDeviceOrientation orientation = [[notification object] orientation]; if (orientation == UIDeviceOrientationLandscapeLeft) { [self.view setTransform:CGAffineTransformMakeRotation(M_PI / 2.0)]; } else if (orientation == UIDeviceOrientationLandscapeRight) { [self.view setTransform:CGAffineTransformMakeRotation(M_PI / -2.0)]; } else if (orientation == UIDeviceOrientationPortraitUpsideDown) { [self.view setTransform:CGAffine TransformMakeRotation(M_PI)]; } else if (orientation == UIDeviceOrientationPortrait) { [self.view setTransform:CGAffineTransformMakeRotation(0.0)]; } }

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• add sub view in center - iPad

  - by Saurabh

  Hello All, I want to add a sub view in current view, this sub view is 300x300. When I add subview using [self.view addSubview:md.view]; the md.view will appear at position (0,0) is there any way to add subview in center? Thanks

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• Constructing a Binary Tree from its traversals

  - by user991710

  I'm trying to construct a binary tree (unbalanced), given its traversals. I'm currently doing preorder + inorder but when I figure this out postorder will be no issue at all. I realize there are some question on the topic already but none of them seemed to answer my question. I've got a recursive method that takes the Preorder and the Inorder of a binary tree to reconstruct it, but is for some reason failing to link the root node with the subsequent children. Note: I don't want a solution. I've been trying to figure this out for a few hours now and even jotted down the recursion on paper and everything seems fine... so I must be missing something subtle. Here's the code: public static <T> BinaryNode<T> prePlusIn( T[] pre, T[] in) { if(pre.length != in.length) throw new IllegalArgumentException(); BinaryNode<T> base = new BinaryNode(); base.element = pre[0]; // * Get root from the preorder traversal. int indexOfRoot = 0; if(pre.length == 0 && in.length == 0) return null; if(pre.length == 1 && in.length == 1 && pre[0].equals(in[0])) return base; // * If both arrays are of size 1, element is a leaf. for(int i = 0; i < in.length -1; i++){ if(in[i].equals(base.element)){ // * Get the index of the root indexOfRoot = i; // in the inorder traversal. break; } // * If we cannot, the tree cannot be constructed as the traversals differ. else throw new IllegalArgumentException(); } // * Now, we recursively set the left and right subtrees of // the above "base" root node to whatever the new preorder // and inorder traversals end up constructing. T[] preleft = Arrays.copyOfRange(pre, 1, indexOfRoot + 1); T[] preright = Arrays.copyOfRange(pre, indexOfRoot + 1, pre.length); T[] inleft = Arrays.copyOfRange(in, 0, indexOfRoot); T[] inright = Arrays.copyOfRange(in, indexOfRoot + 1, in.length); base.left = prePlusIn( preleft, inleft); // * Construct left subtree. base.right = prePlusIn( preright, inright); // * Construc right subtree. return base; // * Return fully constructed tree } Basically, I construct additional arrays that house the pre- and inorder traversals of the left and right subtree (this seems terribly inefficient but I could not think of a better way with no helpers methods). Any ideas would be quite appreciated. Side note: While debugging it seems that the root note never receives the connections to the additional nodes (they remain null). From what I can see though, that should not happen... EDIT: To clarify, the method is throwing the IllegalArgumentException @ line 21 (else branch of the for loop, which should only be thrown if the traversals contain different elements.

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• Unable to update the snapshot view in clearcase on linux

  - by crystal

  Hi I am trying to create a new snapshot view on my machine and i am using the following procedure: creating the view using ct mkview -snapshot -tag testview -vws /home/store/testview.vws /home/view/testview here the view gets created but fails to register which i register using the ct update on this /home/view/testview location tried to change the configspec using ct edcs & but got error "cleartool: Error: Cannot get view info for current view: not a ClearCase object." explicitly modifying the config_spec using vi editor, and the updating the view ends up creating a log...but no files are copied :( Can someone please direct me as to where i am going wrong?

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• Remove a toolbar when pushing a new view

  - by nevan

  In the iPhone maps app there's a toolbar at the bottom of the map view (it contains the Search/Directions segment control and others). When moving from the map view by clicking on a callout, the toolbar slides out with the map view, leaving the next view (a table controller) with no toolbar. I've tried to do the same thing with [self.navigationController setToolbarHidden:YES animated:YES] in the second view controller, but this gives a strange toolbar sliding down animation, while the map view is sliding to the left. Using [self.navigationController setToolbarHidden:YES] in viewDidLoad:animated also causes a bad effect (it makes the toolbar disappear the moment the push animation starts, leaving an ugly white space). I'm assuming the answer to this is to use a nib file, but I'd prefer to do it programatically (if possible). How can I get the toolbar to "stick" to the map view and slide out with it when I push a new view controller? Thanks.

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• [PRISM2] Added view does not appear on screen

  - by Jeaffrey Gilbert

  Why my "mainRegion.Activate(view);" doesn't display the view on screen? It only works if I remove the default view that registered (RegisterViewWithRegion) in ModuleInit.cs though I don't put .Activate() after I added a View. But a problem occurs if I move to other module, and get back to module which default view has been removed, I get blank page. Any clues? Thank you. *) I prefer not to remove default view, but only with Activate(view) can show the View I want as explained in my reference. reference: http://msdn.microsoft.com/en-us/library/dd458899.aspx

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• Exception Handling in MVP Passive View

  - by ilmatte

  Hello, I'm wondering what's the preferred way to manage exceptions in an MVP implemented with a Passive View. There's a discussion in my company about putting try/catch blocks in the presenter or only in the view. In my opinion the logical top level caller is the presenter (even if the actual one is the view). Moreover I can test the presenter and not the view. This is the reason why I prefer to define a method in the view interface: IView.ShowError(error) and invoke it from the catch blocks in the presenter: try { } catch (Exception exception) { ...log exception... view.ShowError("An error occurred") } In this way the developers of future views can safely forget to implement exception handling but the IView interface force them to implement a ShowError method. The drawback is that if I want to feel completely safe I need to add redundant try/catch blocks in the view. The other way would be to add try catch blocks only in the views and not introducing the showerror method in the view interface. What do you suggest?

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• How do I create a view with a picker on the bottom and a table view on the top?

  - by Andy

  Hi - first time asker, long-time lurker. I am trying to create an iPhone view that has a date/time picker on the bottom half of the screen, and a grouped, single-section, four-row table view on the top half of the screen (almost identical to the one Apple shows in Fig. 2-4 of their View Controller Programming Guide (but then never goes on to explain). Conceptually, I think I understand that what I need is a main view with a pair of subviews - one for the picker, and one for the table view. I'm pretty sure I can make the picker function once I have it on-screen, and I'm pretty sure I can make the table view function too. What I can't for the life of me figure out is how, programmatically speaking, to get the two views onto the screen simultaneously. I can lay it out perfectly in Interface Builder, but then it all goes to hell when I switch to Xcode...the view appears with the picker, but no table view. Thanks, in advance, for any help you can offer.

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• iPad UISPlitViewController Common View

  - by saikamesh

  is it possible to have a common view for both master and detail view controllers. What if I need to add a header image(at top, the very first view) common for both the master and detail view controllers. When the device is in the portrait mode the width of the header image view has to shrink to fit to the detail view controller's view and when the orientation changes to landscape the width of the same header image view has to be expanded that is the width of it has to be 1024. Please tell me whether doing this is possible. or any workaround for this?

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• iPhone: Run method from another view

  - by Nic Hubbard

  I have two views that I am loading, the first is a view with an MKMapView, the second has a table view. I would like to access a method in the first views controller, from the second view. I have been told to use the delegate for this, but I can't get it right. In my app delegate, I have set up added properties for the class of my first view. Then, in my second view, I try to access the first view using the delegate: MyAppDelegate *mainDelegate = (MyAppDelegate*) [[UIApplication sharedApplication] delegate]; Then try: [mainDelegate.mapViewControllerClass myMethodToRun]; It seems to me that it should be calling the myMethodToRun method, which is in my map view. But, it does not work. What is wrong with what I am doing here? There must be a way to access a method of another view...

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• MVC design pattern - who loads view initially

  - by enableDeepak

  This query is about MVC design pattern in general and not ASP.net MVC framework I understand in MVC (desktop application): 1. User clicks something in view 2. this is passed on to controller to manage 3. controller makes some changes in Model 4. Model calls method on view which has the logic to refresh UI Questions around these: Q1) Can controller also modify View or Model only updates View? Q2) When screen loads for the first time, there is no Model change. Then, who fetches data from model and populates view? View directly calls Model and populates itself OR controller gets data and passes to view method OR some dummy event is raised at Model which updates View?

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• Access 2010 datasheet view only/relationships unavailable

  - by Luis

  I'm relatively new to MS Access in general and just started working with Access 2010. I've created a new web database with a few tables that I need to relate. First problem: For the life of me, I can't view anything in any view other than datasheet view; everywhere I would expect to be able to change the view, only datasheet view is available. Second problem: I can't change the primary key(s). Presumably I would be able to do this if I could get out of datasheet view and into design view. Third problem: The 'Relationships' button is greyed out. I know these appear to be really simple things but I've been looking for much more time than I'd like to admit trying to figure out how to get unstuck. Update: It would appear that this is happening because it is a 'web database' as I've been able to do all of the above in a new regular database. With this in mind let me ask a different question: Am I able to add relationships and change primary keys in a web database? If so how? More generally, what is the point of a web database?

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• UINavigationController doesn't fully push view and only changes the Navigation toolbar to the next v

  - by user284757

  So I have an iPhone application that utilizes a UINavigationController for setting up the views. When the application first starts, it presents the user with a UITableViewController and the user can select an item and it will push another view. Now I have it set so that my app remembers the user's last selection and automatically selects it and loads the correct view controller. The only problem is that I am experiencing a really weird glitch when I load the next view automatically.. When the view is pushed, the navigation toolbar will change so that a back button directed to the previous view is showing but it won't display the next view. It will instead keep showing the table view and I can interact with it as well. I can press the back button and it will change the toolbar back and the tableview is still shown. Then when I select an item it loads the view just fine. Thanks for the help.

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• Handling Multiple Form Actions on One View?

  - by Pandiya Chendur

  I have multiple master pages in my asp.net mvc web application... Each of the pages add,edit,view and delete functionalities.... What it does is i have to create multiple views for handling add,edit,view and delete functionalities (ie) the user has to navigate to another view to edit/view the details of a record... How to Handle Multiple Form Actions (ie) add,edit,view and delete functionalities on One View?

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• UISplitViewController Common View

  - by saikamesh

  is it possible to have a common view for both master and detail view controllers. What if I need to add a header image(at top, the very first view) common for both the master and detail view controllers. When the device is in the portrait mode the width of the header image view has to shrink to fit to the detail view controller's view and when the orientation changes to landscape the width of the same header image view has to be expanded that is the width of it has to be 1024. Please tell me whether doing this is possible. or any workaround for this?

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• Ember - ConnectOutlet - when does view change from preRender to inDom

  - by dagda1

  I am trying to get my head round the connectOutlet method and when a view that is returned from connectOutet is actually inserted into the DOM. The view that is created in connectOutlet leaves connectOutlet in the preRender state. connectOutlet: function(name, context) { // method body view = this.createOutletView(outletName, viewClass); if (controller) { set(view, 'controller', controller); } set(this, outletName, view); return view; } I've not tracked down where or when the view is inserted into the Dom and the view transitions to the inDom state. I suspect the runloop is at play and it transitions after the current runloop has finished. Can anyone shed any light on this?

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