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  • How to know when StatusBar size changed (iPhone)

    - by JOM
    I have UITabBarController with 2 tabs. One resizes just fine, when StatusBar size changes (emulator "Toggle In-Call Status Bar" menu item). The other one doesn't. The problematic tab item contains a static view, which dynamically loads one or another view depending on certain things. While getting this setup working I discovered that main tab view did NOT automagically send e.g. viewWillAppear and viewWillDisappear messages to my dynamic subviews. Apple docs explained this was because dynamically added views were not recognized by the system. @interface MyTabViewController : UIViewController { UIView *mainView; FirstViewController *aController; SecondViewController *bController; } ... if (index == 0) { self.aController = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil]; [self.mainView addSubview:aController.view]; [self.aController viewWillAppear:YES]; } How can I get StatusBar size changed event into my dynamic subviews? The "didChangeStatusBarFrame" doesn't work, as documented elsewhere.

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  • How can i Write list type returning value in Linq with Entity FrameWork?

    - by programmerist
    How can i return List<personel> data type from below procedure. if i press F5 it throw me this error: Error 1 Cannot implicitly convert type 'System.Linq.IQueryable' to 'System.Collections.Generic.List'. An explicit conversion exists (are you missing a cast?) C:\Documents and Settings\yusufk\Desktop\EFTestSolutions\WebApplicationTest1\WebApplicationTest1\Default.aspx.cs 101 61 WebApplicationTest1 i think that: i should rearrange or recode "select new {. . . . " ? protected List<personel> GetPersonalsData2() { List<personel> personeller; using (FirmaEntities firmactx = new FirmaEntities()) { personeller = (from p in firmactx.Personals select new { p.ID, p.Name, p.SurName }); return personeller.ToList(); } } } public class personel { public int ID { get; set; } public string Name { get; set; } public string SurName { get; set; } }

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  • iPad: Displaying UIActionSheet with UIPickerView as subview

    - by E-Madd
    I'm in the process of migrating an iPhone app to a universal app. On one of my views, I present a UIActionSheet with a UIPickerView as a subview. On the iPhone this always worked just fine. Of course, on the iPad I had to change a little to present the ActionSheet in a popover control. Here's some psuedo-code to outline where I'm at... actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil]; pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0,44,0,0)]; pickerView.delegate = self; pickerView.dataSource = self; pickerView.showsSelectionIndicator = YES; [actionSheet addSubview:pickerView]; if (UI_USER_INTERFACE_IDIOM() != UIUserInterfaceIdiomPad){ [actionSheet showInView:self.view]; [actionSheet setBounds:actRect]; }else{ [actionSheet showFromRect:buttonRect inView:[UIApplication sharedApplication].keyWindow animated:YES]; } The resulting popover on the iPad is very small and only the very top of the UIPickerView is visible. How can I set the size of the popover?

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  • Perl OO frameworks and program design - Moose and Conway's inside-out objects (Class::Std)

    - by Emmel
    This is more of a use-case type of question... but also generic enough to be more broadly applicable: In short, I'm working on a module that's more or less a command-line wrapper; OO naturally. Without going into too many details (unless someone wants them), there isn't a crazy amount of complexity to the system, but it did feel natural to have three or four objects in this framework. Finally, it's an open source thing I'll put out there, rather than a module with a few developers in the same firm working on it. First I implemented the OO using Class::Std, because Perl Best Practices (Conway, 2005) made a good argument for why to use inside-out objects. Full control over what attributes get accessed and so on, proper encapsulation, etc. Also his design is surprisingly simple and clever. I liked it, but then noticed that no one really uses this; in fact it seems Conway himself doesn't really recommend this anymore? So I moved to everyone's favorite, Moose. It's easy to use, although way way overkill feature-wise for what I want to do. The big, major downside is: it's got a slew of module dependencies that force users of my module to download them all. A minor downside is it's got way more functionality than I really need. What are recommendations? Inconvenience fellow developers by forcing them to use a possibly-obsolete module, or force every user of the module to download Moose and all its dependencies? Is there a third option for a proper Perl OO framework that's popular but neither of these two?

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  • Toolbar hiding on rotated UISplitView DetailView

    - by Gerry
    I've based my app on Apple's SplitView project type. I have a TableView as the Master, and am using different types of views as the Detail view. To select types of detail view, I'm using the fancy concept of buttons on my DetailView toolbar. When the DetailView is derived from UIViewController, everything is good. When the DetailView derives from UIViewController, but contains a UITableView then I have problems. In portrait view the toolbar is visible. In landscape mode the toolbar is hidden, even though the Tableview is moved down to allow space for it. The UIToolbar and UITableView are both defined in my NIB file which is loaded to create the detail view. Why is my toolbar invisible in landscape? BTW, is this the best way to choose Detail view types with UISplitView? Bonus question, what if selecting a row in my DetailView tableview should bring up another View, I can't push it like I would with a NaviagtionController, so how do I go back to the detail tableview? Thanks, Gerry

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  • Variant datatype library for C

    - by Joey Adams
    Is there a decent open-source C library for storing and manipulating dynamically-typed variables (a.k.a. variants)? I'm primarily interested in atomic values (int8, int16, int32, uint, strings, blobs, etc.), while JSON-style arrays and objects as well as custom objects would also be nice. A major case where such a library would be useful is in working with SQL databases. The most obvious feature of such a library would be a single type for all supported values, e.g.: struct Variant { enum Type type; union { int8_t int8_; int16_t int16_; // ... }; }; Other features might include converting Variant objects to/from C structures (using a binding table), converting values to/from strings, and integration with an existing database library such as SQLite. Note: I do not believe this is question is a duplicate of http://stackoverflow.com/questions/649649/any-library-for-generic-datatypes-in-c , which refers to "queues, trees, maps, lists". What I'm talking about focuses more on making working with SQL databases roughly as smooth as working with them in interpreted languages.

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  • testing devise with shoulda and machinist

    - by mattherick
    hello! I´d like to test my app with shoulda and machinist. I use the devise authentification gem. I get following error: $ ruby unit/page_test.rb c:/Ruby/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/rails/gem_dependency.rb:119:Warning: Gem::Dependency#version_requirements is deprecated and will be rem oved on or after August 2010. Use #requirement c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in load_missing_constant': uninitialized constant Admins (N ameError) from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:inconst_missing' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in const_missing' from c:/Users/Mattherick/Desktop/heimspiel/heimspiel_app/app/controllers/admins_controller.rb:1 from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:ingem_original_require' from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in require' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:158:inrequire' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:265:in require_or_load' from c:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:224:independ_on' ... 12 levels... from ./unit/../test_helper.rb:2 from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' from c:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire' from unit/page_test.rb:1 Somebody an idea what´s wrong? If I don´t use devise my tests are okay. And my second question: Does somebdoy has a good tutorial for increasing different roles in the devise gem? If I generate my own views and add a few attributes to my devise-model, they won´t be save in the database. I read the docu at github, but don´t really checked it. mattherick

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  • ASP MVC: Submitting a form with nested user controls

    - by Nigel
    I'm fairly new to ASP MVC so go easy :). I have a form that contains a number of user controls (partial views, as in System.Web.Mvc.ViewUserControl), each with their own view models, and some of those user controls have nested user controls within them. I intended to reuse these user controls so I built up the form using a hierarchy in this way and pass the form a parent view model that contains all the user controls' view models within it. For example: Parent Page (with form and ParentViewModel) -->ChildControl1 (uses ViewModel1 which is passed from ParentViewModel.ViewModel1 property) -->ChildControl2 (uses ViewModel2 which is passed from ParentViewModel.ViewModel2 property) -->ChildControl3 (uses ViewModel3 which is passed from ViewModel2.ViewModel3 property) I hope this makes sense... My question is how do I retrieve the view data when the form is submitted? It seems the view data cannot bind to the ParentViewModel: public string Save(ParentViewModel viewData)... as viewData.ViewModel1 and viewData.ViewModel2 are always null. Is there a way I can perform a custom binding? Ultimately I need the form to be able to cope with a dynamic number of user controls and perform an asynchronous submission without postback. I'll cross those bridges when I come to them but I mention it now so any answer won't preclude this functionality. Many thanks.

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  • Android ignores scrollbarsize

    - by Maragues
    Hi, I'm trying to modify a ListView scrollbar's width without success <ListView android:id="@+id/android:list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:choiceMode="singleChoice" android:scrollbars="vertical" android:scrollbarTrackVertical="@drawable/scrollbar_vertical_track" android:scrollbarThumbVertical="@drawable/scrollbar_vertical_thumb" android:scrollbarSize="4px" android:clickable="true"/> First I tried using a drawable image 4px wide, but the .png was resized. Then I tried using a shape extracted from SamplesApi, without success. <shape xmlns:android="http://schemas.android.com/apk/res/android" android:width="40px"> <gradient android:startColor="#505050" android:endColor="#C0C0C0" android:angle="0"/> <corners android:radius="0dp" /> I've tried with and without the android:width attribute. There's a question on the same topic (http://stackoverflow.com/questions/2565083/width-of-a-scroll-bar-in-android), but it doesn't try anything different that what I'm already trying. As far as I know, creating my own theme shouldn't change the output. There's an example in SamplesApi (Views/ScrollBars). I tried modifying the scrollbarSize attribute without result. I know about ninepatch images, but there's an attribute which should do what I want. Any hint? Thanks in advance.

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  • ASP.Net MVC 3 Full Name In DropDownList

    - by tgriffiths
    I am getting a bit confused with this and need a little help please. I am developing a ASP.Net MVC 3 Web application using Entity Framework 4.1. I have a DropDownList on one of my Razor Views, and I wish to display a list of Full Names, for example Tom Jones Michael Jackson James Brown In my Controller I retrieve a List of User Objects, then select the FirstName and LastName of each User, and pass the data to a SelectList. List<User> Requesters = _userService.GetAllUsersByTypeIDOrgID(46, user.organisationID.Value).ToList(); var RequesterNames = from r in Requesters let person = new { UserID = r.userID, FullName = new { r.firstName, r.lastName } } orderby person.FullName ascending select person; viewModel.RequestersList = new SelectList(RequesterNames, "UserID", "FullName"); return View(viewModel); In my Razor View I have the following @Html.DropDownListFor(model => model.requesterID, Model.RequestersList, "Select", new { @class = "inpt_a"}) @Html.ValidationMessageFor(model => model.requesterID) However, when I run the code I get the following error At least one object must implement IComparable. I feel as if I am going about this the wrong way, so could someone please help with this? Thanks.

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  • Zend Framework how to echo value of SUM query

    - by Rick de Graaf
    Hello, I created a query for the zend framework, in which I try to retrieve the sum of a column, in this case the column named 'time'. This is the query I use: $this->timequery = $this->db_tasks->fetchAll($this->db_tasks->select()->from('tasks', 'SUM(time)')->where('projectnumber =' . $this->value_project)); $this->view->sumtime = $this->timequery; Echoing the query tells me this is right. But I can't echo the result properly. Currently I'm using: echo $this->sumtime['SUM(time)']; Returning the following error: Catchable fatal error: Object of class Zend_Db_Table_Row could not be converted to string in C:\xampp\htdocs\BManagement\application\views\scripts\tasks\index.phtml on line 46 Line 46 being the line with the echo in my view. I've been searching now for two days on how to figure this out, or achieve the same result in a different way. Tried to serialize the value, but that didn't work either. Is there somebody who knows how to achieve the total sum of a database column? Any help is greatly appriciated! note: Pretty new to zend framework...

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  • How to find out if an object's type implements IEnumerable<X> where X derives from Base using Reflec

    - by Dave Van den Eynde
    Give a base class "Base", I want to write a method Test, like this: private static bool Test(IEnumerable enumerable) { ... } such that Test returns true if the type of o implements any interface of IEnumerable where X derives from Base, so that if I would do this: public static IEnumerable<string> Convert(IEnumerable enumerable) { if (Test(enumerable)) { return enumerable.Cast<Base>().Select(b => b.SomePropertyThatIsString); } return enumerable.Cast<object>().Select(o => o.ToString()); } ...that it would do the right thing, using Reflection. I'm sure that its a matter of walking across all the interfaces of the type to find the first that matches the requirements, but I'm having a hard time finding the generic IEnumerable< among them. Of course, I could consider this: public static IEnumerable<string> Convert(IEnumerable enumerable) { return enumerable.Cast<object>().Select(o => o is Base ? ((Base)o).SomePropertyThatIsString : o.ToString()); } ...but think of it as a thought experiment.

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  • Input validation in WPF

    - by irfanali-wpfexpert
    i am developing an application in wpf using MVVM design pattern. i have a listbox when an item is slected then a dialog is open having the same record in editable mode. this dialog is binded with the selected item of the list. i have apply the validation rule for textbox using IDataErrorInfo. when the user update a record on dialogbox then at every key press, the selected record in listbox is also changed. if the user press save button then i submit changes to database. but if user click cancel button then i do not submit changes to database but the list box is updated with the current updation in GUI. when i refresh the list then old value appears again. My requirement is to update the listbox only when the user hit the save button but not on every key press on dialog box. I first fill the generic list with the linq to sql classes then bind the listbox with it. Please let me know what i have to do. Thanks in advance

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  • EF 4.0 : Save Changes Retry Logic

    - by BGR
    Hi, I would like to implement an application wide retry system for all entity SaveChanges method calls. Technologies: Entity framework 4.0 .Net 4.0 namespace Sample.Data.Store.Entities { public partial class StoreDB { public override int SaveChanges(System.Data.Objects.SaveOptions options) { for (Int32 attempt = 1; ; ) { try { return base.SaveChanges(options); } catch (SqlException sqlException) { // Increment Trys attempt++; // Find Maximum Trys Int32 maxRetryCount = 5; // Throw Error if we have reach the maximum number of retries if (attempt == maxRetryCount) throw; // Determine if we should retry or abort. if (!RetryLitmus(sqlException)) throw; else Thread.Sleep(ConnectionRetryWaitSeconds(attempt)); } } } static Int32 ConnectionRetryWaitSeconds(Int32 attempt) { Int32 connectionRetryWaitSeconds = 2000; // Backoff Throttling connectionRetryWaitSeconds = connectionRetryWaitSeconds * (Int32)Math.Pow(2, attempt); return (connectionRetryWaitSeconds); } /// <summary> /// Determine from the exception if the execution /// of the connection should Be attempted again /// </summary> /// <param name="exception">Generic Exception</param> /// <returns>True if a a retry is needed, false if not</returns> static Boolean RetryLitmus(SqlException sqlException) { switch (sqlException.Number) { // The service has encountered an error // processing your request. Please try again. // Error code %d. case 40197: // The service is currently busy. Retry // the request after 10 seconds. Code: %d. case 40501: //A transport-level error has occurred when // receiving results from the server. (provider: // TCP Provider, error: 0 - An established connection // was aborted by the software in your host machine.) case 10053: return (true); } return (false); } } } The problem: How can I run the StoreDB.SaveChanges to retry on a new DB context after an error occured? Something simular to Detach/Attach might come in handy. Thanks in advance! Bart

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  • Newtonsoft JSON Interface Serialization error

    - by Ben
    I am using C# .NET 4.0, Newtonsoft JSON 4.5.0. public class Recipe { [JsonProperty(TypeNameHandling = TypeNameHandling.All)] public List<IFood> Foods{ get; set; } ... } I want to serialize and deserialize this Recipe object. If I serialize and deserialize the object during application lifetime this succeeds, but if I serialize the object, exit application and then deserialize it then it throws an exception, that it cannot instantiate IFood (since it is an interface). The problem is that it does not serialize the implementation of interface. "$type": "System.Collections.Generic.List`1[[NSM.Shared.Models.IFood, NSMShared]], mscorlib" I tried using TypeNameHandling.Object and Array and Auto, but it didn't help. Is there any way to serialize it properly? Or at least to define the class mapping before deserializing? EDIT: I am using JSON coupled with Hammock ( http://code.google.com/p/relax-net/ ), C# driver for CouchDB, which internally serializes and deserializes objects. As mentioned the problem is that it does not serialize the interface implementation.

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  • Right to Left UI in iPhone (Hebrew)

    - by Reflog
    Hello, I'm struggling in creating a RTL UI in iPhone application. The framework doesn't seem to have any support for RTL languages. The only thing is the alignment inside labels, which is nice, but it conflicts with other controls behaviour. The question is: Is there a working code for a RTL TableView? Something that would handle the disclosure buttons to be on the left, section titles to be right aligned, index view to be left aligned? As far as I understand I cannot move the index view of the tableview, i have to overlay some custom control... Any suggestions/pointers/examples? p.s. this is not a duplication of this question: http://stackoverflow.com/questions/1677988/right-to-left-alignment-for-uitableview since what I am looking for is a deeper customization, not just a new type of CellView. (Update: Mar 10) For now - I've removed support for indexView from the tableView at all, implemented the cells as custom views by myself (with disclosure buttons on the left), and customized the header/footer of the table as well. the only thing that is left is the Index View. Thanks in advance!

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  • Using a CALayer in UITableViewCell

    - by Brian
    On each cell of my table view I want to have a bar that the user can slide out from the right. On the bar I plan to have icons. So, to do this I subclassed UITableViewCell. On the cell I have implemented drawRect and in there I have already drawn a gradient and background color on the cell. From there, I can create a CALayer, give it a frame & background color, and add it as a sub layer to the Views subLayers array. I can do all that and it will display my layer on each UITableViewCell. I have added touch events to the cell so I can detect when the user touches the cell and for testing I have made it so when the user swipes, my CALayer gets wider. But the issue is, when the UITableView scrolls and reuses a cell whose CALayer has been widened, it doesn't recreate the CALayer. I have tried [myLayer setNeedsDisplay] and used the drawLayer:inContext method of its delegate and it doesn't get called. I have also tried telling call setNeedsDisplay on the cell in my UITableViewController hoping that that will cause a redraw, but it doesn't work. I'm not sure what I'm missing. I am new to CoreGraphics & CoreAnimation. I have read through the CoreAnimation Developers Guide, but I'm assuming I missing something. Any help would be great.

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  • Webdev.Webserver has stopped working

    - by Alexander
    When I execute the code saveXML below it generates the error above, why?? using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Xml.Serialization; using System.IO; /// <summary> /// Summary description for Post /// </summary> public class Post { private int postIDCounter = 0; private String DateCreated; public Post() { Author = "unknown"; Title = "unkown"; Content = ""; DateCreated = DateTime.Now.ToString(); ID = postIDCounter++; } public int ID { get { return ID; } set { if (ID != value) ID = value; } } public string Author { get { return Author; } set { if (Author != value) Author = value; } } public string Title { get { return Title; } set { if (Title != value) Title = value; } } public string Content { get { return Content; } set { if (Content != value) Content = value; } } public void saveXML() { XmlSerializer serializer = new XmlSerializer(typeof(Post)); Stream writer = new FileStream("..'\'App_Data'\'posts'\'" + new Guid(ID.ToString()).ToString() + ".xml", FileMode.Create); serializer.Serialize(writer, this); writer.Close(); } }

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  • How can I render a list of objects using DisplayFor but from the controller in ASP.NET MVC?

    - by Darragh
    Here's the scenaio, I have an Employee object and a Company object which has a list of employees. I have Company.aspx which inherits from ViewPage<Company>. In Company.aspx I call Html.DisplayFor(m => m.Employees). I have an Employee.ascx partial view which inherits from ViewUserControl<Employee in my DisplayTemplates folder. Everything works fine and Company.aspx renders the Employee.ascx partial for each employee. Now I have two additional methods on my controller called GetEmployees and GetEmployee(Id). In the GetEmployee(Id) action I want to return the markup to display this one employee, and in GetEmployees() I want to render the markup to display all the employees (these two action methods will be called via AJAX). In the GetEmployee action I call return PartialView("DisplayTemplates\Employee", employee) This works, although I'd prefer something like return PartialViewFor(employee) which would determine the view name by convention. Anwyay, my question is how should I implement the GetEmployees() action? I don't want to create any more views, because frankly, I don't see why I should have to. I've tried the following which fails miserably :) return Content(New HtmlHelper<IList<Of DebtDto>>(null, null).DisplayFor(m => debts)); However if I could create an instance of an HtmlHelper object in my controller, I suppose I could get it to work, but it feels wrong. Any ideas? Have i missed something obvious?

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  • NSKeyedArchiver on NSArray has large size overhead

    - by redguy
    I'm using NSKeyedArchiver in Mac OS X program which generates data for iPhone application. I found out that by default, resulting archives are much bigger than I expected. Example: NSMutableArray * ar = [NSMutableArray arrayWithCapacity:10]; for (int i = 0; i < 100000; i++) { NSString * s = [NSString stringWithFormat:@"item%06d", i]; [ar addObject:s]; } [NSKeyedArchiver archiveRootObject:ar toFile: @"NSKeyedArchiver.test"]; This stores 10 * 100000 = 1M bytes of useful data, yet the size of the resulting file is almost three megabytes. The overhead seems to be growing with number of items in the array. In this case, for 1000 items, the file was about 22k. "file" reports that it is a "Apple binary property list" (not the XML format). Is there an simple way to prevent this huge overhead? I wanted to use the NSKeyedArchiver for the simplicity it provides. I can write data to my own, non-generic, binary format, but that's not very elegant. Also, aggregating the data into large chunks and feeding these to the NSKeyedArchiver should work, but again, that kinda beats the point of using simple&easy&ready to use archiver. Am I missing some method call or usage pattern that would reduce this overhead?

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  • How to detect hidden field tampering?

    - by Myron
    On a form of my web app, I've got a hidden field that I need to protect from tampering for security reasons. I'm trying to come up with a solution whereby I can detect if the value of the hidden field has been changed, and react appropriately (i.e. with a generic "Something went wrong, please try again" error message). The solution should be secure enough that brute force attacks are infeasible. I've got a basic solution that I think will work, but I'm not security expert and I may be totally missing something here. My idea is to render two hidden inputs: one named "important_value", containing the value I need to protect, and one named "important_value_hash" containing the SHA hash of the important value concatenated with a constant long random string (i.e. the same string will be used every time). When the form is submitted, the server will re-compute the SHA hash, and compare against the submitted value of important_value_hash. If they are not the same, the important_value has been tampered with. I could also concatenate additional values with the SHA's input string (maybe the user's IP address?), but I don't know if that really gains me anything. Will this be secure? Anyone have any insight into how it might be broken, and what could/should be done to improve it? Thanks!

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  • The name capture does not exist in the current context ERROR

    - by Haxed
    Hi I am developing a campera capture application. I am currently using EmguCV 2.0. I get an error with the following line of code : Image image = capture.QueryFrame(); I have added all the required references of EmguCV like Emgu.CV,Emgu.CV.UI, Emgu.CV.ML, Emgu.Util, but still it gives a error saying : Error 1 The name 'capture' does not exist in the current context C:\Documents and Settings\TLNA\my documents\visual studio 2010\Projects\webcamcapture\webcamcapture\Form1.cs 27 38 webcamcapture I got this code from here. The full program code is given below:- using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using Emgu.CV; using Emgu.CV.UI; using Emgu.CV.Structure; using Emgu.CV.ML; namespace webcamcapture { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void timer1_Tick(object sender, EventArgs e) { Image<Bgr, Byte> image = capture.QueryFrame(); pictureBox1.Image = image.ToBitmap(pictureBox1.Width, pictureBox1.Height); } } }

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  • Need help with creating complex UITableView items (like the Settings app).

    - by Craig
    I hoping to create a custom Settings view, similar to the Settings application, but with more control over the UI and access to some settings (i need to lock some of the settings). Obvously, there are a variety of UI elements mixed in each row of application's UITableView. For example, the 'Airplane Mode' setting shows a UISwitch, while the 'Wi-Fi' setting has a text value adjacent to the disclosure symbol (''). Further complicating matters, is the grouping of these settings. I have some general questions about the approach I should take: Seems like i need to save the name of the setting, its current value, its grouping, and the type of UI element(s) needed to modify its value. i would like to make use [NSUserDefault standardUserDefaults], but not have these settings appear in the Settings application. I'm guessing that I will need to create my own settings-persistence class. is it better to build each one of these complex UI-element combinations in code or to create a series of custom views based on the UITableViewCell and load the appropriate one? i'm guessing the latter. some of the setting require that i load another view to select its value. assuming that the application is based on the Utility pattern, should the SettingsView manage the navigation stack, rather than having the app delegate do so? Thanks for your time and comments. Craig Buchanan

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  • Handling Erlang inets http client errors

    - by Justin
    I have an Erlang app which makes a large number of http calls to external sites using inets, using the code below case http:request(get, {Url, []}, [{autoredirect, false}], []) of {ok, {{_, Code, _}, _, Body}}-> case Code of 200 -> HandlerFn(Body); _ -> {error, io:format("~s returned HTTP ~p", [Broker, Code])} end; Response -> %% block to handle unexpected responses from inets {error, io:format("~s returned ~p", [Broker, Response])} end. There is an explicit block to handle anything strange inets might return [Response]. Despite this, I still get what look like inets error reports dumped to the console [sample below]. What am I doing wrong here ? Do I need to configure some kind of inets error handler elsewhere ? Thanks. -- =ERROR REPORT==== 24-Apr-2010::06:49:47 === ** Generic server <0.6618.0 terminating ** Last message in was {connect_and_send, {request,#Ref<0.0.0.139358,<0.6613.0,0,http, {"***",80}, "****************", [],get, {http_request_h,undefined,"keep-alive", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,"news.bbc.co.uk", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,[],undefined,undefined,undefined, undefined,"0",undefined,undefined, undefined,undefined,undefined,undefined,[]}, {[],[]}, {http_options,"HTTP/1.1",infinity,false,[], undefined,false,infinity}, "*******************", [],none,[],1272088179114,undefined,undefined}} * When Server state == {state, {request,#Ref<0.0.0.139358,<0.6613.0,0,http, {"********",80}, "***************", [],get, {http_request_h,undefined,"keep-alive", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,undefined,"news.bbc.co.uk", undefined,undefined,undefined,undefined, undefined,undefined,undefined,undefined, undefined,[],undefined,undefined, undefined,undefined,"0",undefined, undefined,undefined,undefined,undefined, undefined,[]}, {[],[]}, {http_options,"HTTP/1.1",infinity,false,[], undefined,false,infinity}, "**********************", [],none,[],1272088179114,undefined,undefined}, undefined,undefined,undefined,undefined,undefined, {[],[]}, {[],[]}, undefined,[],nolimit,nolimit, {options, {undefined,[]}, 0,2,5,120000,2,disabled,false,inet,default, default,[]}, {timers,[],undefined}, httpc_manager,undefined} ** Reason for termination == ** {error,{connect_failed,{#Ref<0.0.0.139358,{error,nxdomain}}}} =ERROR REPORT==== 24-Apr-2010::06:49:47 === HTTPC-MANAGER handler (<0.6618.0, started) failed to connect and/or send request #Ref<0.0.0.139358 Result: {error,{connect_failed,{#Ref<0.0.0.139358,{error,nxdomain}}}}

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  • Templates vs. coded HTML

    - by Alan Harris-Reid
    I have a web-app consisting of some html forms for maintaining some tables (SQlite, with CherryPy for web-server stuff). First I did it entirely 'the Python way', and generated html strings via. code, with common headers, footers, etc. defined as functions in a separate module. I also like the idea of templates, so I tried Jinja2, which I find quite developer-friendly. In the beginning I thought templates were the way to go, but that was when pages were simple. Once .css and .js files were introduced (not necessarily in the same folder as the .html files), and an ever-increasing number of {{...}} variables and {%...%} commands were introduced, things started getting messy at design-time, even though they looked great at run-time. Things got even more difficult when I needed additional javascript in the or sections. As far as I can see, the main advantages of using templates are: Non-dynamic elements of page can easily be viewed in browser during design. Except for {} placeholders, html is kept separate from python code. If your company has a web-page designer, they can still design without knowing Python. while some disadvantages are: {{}} delimiters visible when viewed at design-time in browser Associated .css and .js files have to be in same folder to see effects in browser at design-time. Data, variables, lists, etc., must be prepared in advanced and either declared globally or passed as parameters to render() function. So - when to use 'hard-coded' HTML, and when to use templates? I am not sure of the best way to go, so I would be interested to hear other developers' views. TIA, Alan

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