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• How to arrange models, views, controllers in a new Kohana 3 project

  - by Pekka

  I'm looking at how to set up a mid-sized web application with Kohana 3. I have implemented MVC patterns in the past but never worked against a "formalized" MVC framework so I'm still getting my head around the terminology - toying around with basic examples, building views and templates, and so on. I'm progressing fairly well but I want to set up a real-world web project (one of my own that I've been planning for quite some time now) as a learning object. Example-based documentation is a bit sparse for Kohana 3 right now - they say so themselves on the site. While I'm not worried about learning the framework soon enough, I'm a bit at a loss on how to arrange a healthy code base from the start - i.e. how to split up controllers, how to name them, and how to separate the functionality into the appropriate models. My application could, in its core, be described as a business directory with a main businesses table. Businesses can be listed by category and by street name. Each business has a detail page. Business owners can log in and edit their business's entry. Businesses can post offers into an offers table. I know this is pretty vague, I'll be more than happy to go into more detail on request. Supposing I have all the basic functionality worked out and in place already - list all businesses, edit business, list businesses by street name, create offer, and so on, and I'm just looking for how to fit the functionality into a Kohana application structure that can be easily extended: Do you know real-life, publicly accessible examples of applications built on Kohana 3 where I could take a peek how they do it? Are there conventions or best practices on how to structure an extendable login area for end users in a Kohana project that is not only able to handle a business directory page, but further products on separate pages as well? Do you know application structuring HOWTOs or best practices for Kohana 3 not mentioned in the user guide and the inofficial Wiki? Have you built something similar and could give me some recommendations?

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• jQuery draggable + droppable: how to snap dropped element to dropped-on element

  - by 10goto10

  I have my screen divided into two DIVs. In the left DIV I have a few 50x50 pixel DIVs, in the right DIV I have an empty grid made of 80x80 LIs. The DIVs on the left are draggable, and once dropped on a LI, they should snap to center of that LI. Sounds simple, right? I just don't know how to get this done. I tried by manipulating the dropped DIV's top and left CSS properties to match those of the LI they're dropped into, but the left and top properties are relative to the left DIV. How can I best have the dropped element snap to the center of the element it's dropped into? That's gotta be simple, right? Edit: I'm using jQuery UI 1.7.2 with jQuery 1.3.2. Edit 2: For whoever else has this problem, this is how I fixed it: I used Keith's solution of removing the dragged element and placing it inside the dropped-on element in the drop callback of the droppable plugin: function gallerySnap(droppedOn, droppedElement) { $(droppedOn).html('<div class="drop_styles">'+$(droppedElement).html()+'</div>' ); $(droppedElement).remove(); } I don't the dropped element to be draggable again, but if you do, just bind draggable to it again. For me this method also solved the problem I had when positioning the dropped elements (which would be relative to the left DIV) and scrolling inside the second DIV. (Elements would remain fixed on page, now they scroll along). I did play with the snap options to make it look good while dragging, so thanks to karim79 for that suggestion. I probably won't win any Awesome Code prizes with this, so if you see room for improvement, please share!

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• Get contact name from just the number

  - by user1190019

  Say i have an edit text and a button. In the edit text you would type a number and then when you hit the button it will either show the contact information or return with the name of that contact. I have tried all sorts of methods provided with no luck. The one i have successfully gotten the furthest with was the following... But i had no luck returning the name. Cursor phoneCursor = null; contactList = new HashMap<String,String>(); try{ Uri uContactsUri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI; String strProjection = ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME; phoneCursor = getContentResolver().query(uContactsUri, null, null, null, strProjection); phoneCursor.moveToFirst(); String name = ""; String phoneNumber = ""; int nameColumn = phoneCursor.getColumnIndex(Phone.DISPLAY_NAME); int phoneColumn = phoneCursor.getColumnIndex(Phone.NUMBER); phoneCursor.moveToNext(); } } catch(Exception e){ Log.e("[SmsMain] getContactData", e.toString()); } finally{ if(phoneCursor != null){ phoneCursor.close(); phoneCursor = null; } } }

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• SQL Server slow in production environment

  - by Lieven Cardoen

  I have a weird problem in a customer's production environment. I can't give any details on the infrastructure, except that SQL server runs on a virtual server. The data, log and filestream file are on another storage server (data and filestream together and log on a separate server). In our local Test environment, there's one particular query that executes with these durations: first we clear the cache 300ms (First time it takes longer, but from then on it's cached.) 20ms 15ms 17ms In the customer's production environment, the SQL Server is more powerful, these are the durations (I didn't have the rights to clear the cache. Will try this tomorrow). 2500ms 2600ms 2400ms The servers in the customer's production environment are more powerful but they do have virtual servers (we don't). What could be the cause... Not enough memory? Fragmentation? Physical storage? How would you tackle this performance problem? EDIT: Some people have asked me if the data set is equal and it is. I restored their database on our environment. It's true that this was the first thing I looked at. (@Everyone: I added the edit because it will be the first thing that many will think off).

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• Need help using the DefaultModelBinder for a nested model.

  - by Will

  There are a few related questions, but I can't find an answer that works. Assuming I have the following models: public class EditorViewModel { public Account Account {get;set;} public string SomeSimpleStuff {get;set;} } public class Account { public string AccountName {get;set;} public int MorePrimitivesFollow {get;set;} } and a view that extends ViewPage<EditorViewModel> which does the following: <%= Html.TextBoxFor(model => model.Account.AccountName)%> <%= Html.ValidationMessageFor(model => model.Account.AccountName)%> <%= Html.TextBoxFor(model => model.SomeSimpleStuff )%> <%= Html.ValidationMessageFor(model => model.SomeSimpleStuff )%> and my controller looks like: [HttpPost] public virtual ActionResult Edit(EditorViewModel account) { /*...*/ } How can I get the DefaultModelBinder to properly bind my EditorViewModel? Without doing anything special, I get an empty instance of my EditorViewModel with everything null or default. The closest I've come is by calling UpdateModel manually: [HttpPost] public virtual ActionResult Edit(EditorViewModel account) { account.Account = new Account(); UpdateModel(account.Account, "Account"); // this kills me: UpdateModel(account); This successfully updates my Account property model, but when I call UpdateModel on account (to get the rest of the public properties of my EditorViewModel) I get the completely unhelpful "The model of type ... could not be updated." There is no inner exception, so I can't figure out what's going wrong. What should I do with this?

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• ASP.NET MVC : strange POST behavior

  - by user93422

  ASP.NET MVC 2 app I have two actions on my controller (Toons): [GET] List [POST] Add App is running on IIS7 integration mode, so /Toons/List works fine. But when I do POST (that redirects to /Toons/List internally) it redirects (with 302 Object Moved) back to /Toons/Add. The problem goes away if I use .aspx hack (that works in IIS6/IIS7 classic mode). But without .aspx - GET work fine, but POST redirects me onto itself but with GET. What am I missing? I'm hosting with webhost4life.com and they did change IIS7 to integrated mode already. EDIT: The code works as expected using UltiDev Cassini server. EDIT: It turned out to be trailing-slash-in-URL issue. Somehow IIS7 doesn't route request properly if there is no slash at the end. EDET: Explanation of the behavior What happens is when I request (POST) /Toons/List (without trailing slash), IIS doesn't find the handler (I do not have knowledge to understand how exactly IIS does URL-to-handler mapping) and redirects the request (using 302 code) to /Toons/List/ (notice trailing slash). A browser, according to the HTTP specification, must redirect the request using same method (POST in this case), but instead it handles 302 as if it is 303 and issues GET request for the new URL. This is incorrect, but known behavior of most browsers. The solution is either to use .aspx-hack to make it unambiguous for IIS how to map requests to ASP.NET handler, or configure IIS to handle everything in the virtual directory using ASP.NET handler. Q: what is a better way to handle this?

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• TypeConverter prevents ApplyPropertyChanges in EntityFramework

  - by Felix

  I ran into an interesting problem (hopefully, interesting not just for me :) I am running Entity Framework 1 (.NET 3.5) and ASP.NET MVC 2. I have a Customer class that has many-to-one relationship with Country class (in other words, Country is a lookup table for customers - I described more in this post: http://stackoverflow.com/questions/2404801/explicit-casting-doesnt-work-in-default-model-binding ) I got TypeConverter to work; so I am getting a perfect object into controller's Post method. Create works fine; however, in Edit I am getting the following error when I call ApplyPropertyChanges: The existing object in the ObjectContext is in the Added state. Changes can only be applied when the existing object is in an unchanged or modified state. The controller code is fairly trivial: public ActionResult Edit(Customer customerToEdit) { if (ModelState.IsValid) { Customer cust = (Customer)context.GetObjectByKey( new EntityKey("BAEntities.Customers", "CustomerID", customerToEdit.CustomerID)); context.ApplyPropertyChanges(cust.EntityKey.EntitySetName, customerToEdit); context.SaveChanges(); } return View(...); } If I remove country from the form, it works fine; and if I assign dropdown value to EntityReference "manually" - it works as well. TypeConverter code is also fairly simple, but I've never used TypeConverter before, so I may be missing something here: public override object ConvertFrom(ITypeDescriptorContext typeContext, CultureInfo culture, object value) { if (value is string) { int countryID = Int16.Parse((string)value); Country country = (Country)context.GetObjectByKey( new EntityKey("BAEntities.Countries", "CountryID", countryID)); return country; } return base.ConvertFrom(typeContext, culture, value); }

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• Is there a way to update a ViewModel in MVC2?

  - by Juvaly

  This code works: [HttpPost] public ActionResult Edit(int id, FormCollection fc) { Movie movie = ( from m in _ctx.Movie.Include("MovieActors") where m.MovieID == id select m ).First(); MovieActorViewModel movieActor = new MovieActorViewModel(movie); if (TryUpdateModel(movieActor)) { _ctx.ApplyPropertyChanges(movieActor.Movie.EntityKey.EntitySetName, movieActor.Movie); _ctx.SaveChanges(); } return View(movieActor); } However, I am not sure how to test this, and in general would much rather have the method take a typed model like: [HttpPost] public ActionResult Edit(MovieActorViewModel movieActor) Is this possible? What changes to my MovieActorViewModel class do I need to make in order to enable this? That class looks like this: public class MovieActorViewModel { public Movie Movie { get; set; } public Actor Actor { get; set; } public PublisherDealViewModel(Movie movie) { this.Movie = movie; this.Actor = ( from a in this.Movie.Actors where a.ActorID == 1 select a ).First(); } } The view is typed (inherits ViewPage) simple: <% using (Html.BeginForm()) {%> Movie Title: <%= Html.TextBoxFor(model=>model.Movie.Title) %><br/> Actor Name: <%= Html.TextBoxFor(model=>model.Actor.Name) %> <% } %>

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• Using HttpClient with the RightScale API

  - by Ameer Deen

  I'm trying to use the WCF Rest Starter Kit with the RightScale's Login API which seems fairly simple to use. Edit - Here's a blog entry I wrote on using Powershell to consume the API. Edit - Created a generic .NET wrapper for the RightScale API - NRightAPI It's exactly as simple as it looks while using CURL. In order for me to obtain a login cookie all I need to do is: curl -v -c rightcookie -u username:password "https://my.rightscale.com/api/acct/accountid/login?api_version=1.0" And I receive the following cookie: HTTP/1.1 204 No Content Date: Fri, 25 Dec 2009 12:29:24 GMT Server: Mongrel 1.1.3 Status: 204 No Content X-Runtime: 0.06121 Content-Type: text/html; charset=utf-8 Content-Length: 0 Cache-Control: no-cache Added cookie _session_id="488a8d9493579b9473fbcfb94b3a7b8e5e3" for domain my.rightscale.com, path /, expire 0 Set-Cookie: _session_id=488a8d9493579b9473fbcfb94b3a7b8e5e3; path=/; secure Vary: Accept-Encoding However, when I use the following C# code: HttpClient http = new HttpClient("https://my.rightscale.com/api/accountid/login?api_version=1.0"); http.TransportSettings.UseDefaultCredentials = false; http.TransportSettings.MaximumAutomaticRedirections = 0; http.TransportSettings.Credentials = new NetworkCredential("username", "password"); Console.WriteLine(http.Get().Content.ReadAsString()); Instead of a HTTP 204, I get a redirect: You are being <a> href="https://my.rightscale.com/dashboard"redirected <a> How do I get the WCF REST starter kit working with the RighScale API ?

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• Django Admin: OneToOne Relation as an Inline?

  - by Jim Robert

  I am putting together the admin for a satchmo application. Satchmo uses OneToOne relations to extend the base Product model, and I'd like to edit it all on one page. It is possible to have a OneToOne relation as an Inline? If not, what is the best way to add a few fields to a given page of my admin that will eventually be saved into the OneToOne relation? for example: class Product(models.Model): name = models.CharField(max_length=100) ... class MyProduct(models.Model): product = models.OneToOne(Product) ... I tried this for my admin but it does not work, and seems to expect a Foreign Key: class ProductInline(admin.StackedInline): model = Product fields = ('name',) class MyProductAdmin(admin.ModelAdmin): inlines = (AlbumProductInline,) admin.site.register(MyProduct, MyProductAdmin) Which throws this error: <class 'satchmo.product.models.Product'> has no ForeignKey to <class 'my_app.models.MyProduct'> Is the only way to do this a Custom Form? edit: Just tried the following code to add the fields directly... also does not work: class AlbumAdmin(admin.ModelAdmin): fields = ('product__name',)

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• jquery jeditable pass multiple values...

  - by Scott

  Alright totally new to jeditable, Say I have some <div>'s and <input type='hidden' /> items that are generated dynamically with PHP like this: <?php while($row = $db->fetch_assoc($query)) : ?> <input name="hiddenID" type="hidden" value="<?php echo $row['id'] ?>" <div class="items"><?php echo $row['item']; ?></div> <?php endwhile; ?> Which gives me say...this: 1 //hidden value item1 2 //hidden value item2 3 //hidden value item3 And a jeditable inline-edit script to go along with it: hidden = $(".items").siblings("[name=hiddenID]").val(); //using a global var..don't know how to pass it into the editable function. $(".items").editable('save.php', { type : 'text', tooltip : 'Double-Click to edit...', onblur : 'submit', event : 'dblclick', submitdata : function() { return {id : hidden }; //how do I pass mutiple hiddenID values?? } }); I am wondering how to pass multiple values into the editable function. The way I've shown here only passes one value...the first row.

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• Building Web Application project using MSBuild from command line on 64-bit: missing targets file

  - by James Allen

  Building a solution containing a web application project using MSBuild from powershell like this: msbuild "/p:OutDir=$build_dir\" $solution_file Works fine for me on 32-bit, but on a 64-bit machine I am running into this error: error MSB4019: The imported project "C:\Program Files\MSBuild\Microsoft\VisualStudio\v9.0\WebApplications\Microsoft.WebApplication.targets" was not found. Confirm that the path in the declaration is correct, and that the file exists on disk. I am using Visual Studio 2008 and powershell v2. The problem has already been documented here and here. Basically on 64-bit install of VS, the Microsoft.WebApplication.targets needed by MSBuild is in the Program Files(x86) dir, not the Program Files dir, but MSBuild doesn't recognise this and so looks in the wrong place. The two solutions are not ideal: Manually copy the file on 64-bit from Program Files(x86) to Program Files. This is a poor solution - every dev will have to do this manually. Manually edit the csproj file so MSBuild looks in the right place. Again not ideal: I would rather not have to get everyone on 64bit to manually edit csproj files on every new project. e.g. <Import Project="$(MSBuildExtensionsPathx86)\$(WebAppTargetsSuffix)" Condition="Exists('$(MSBuildExtensionsPathx86)\$(WebAppTargetsSuffix)')" /> Ideally I want a way to tell MSBuild to import the target file form the right place from the command line but I can't work out how to do that. Any solutions?

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• How to explain to users the advantages of dumb primary key?

  - by Hao

  Primary key attractiveness I have a boss(and also users) that wants primary key to be sophisticated/smart/attractive control number(sort of like Social Security number, or credit card number format) I just padded the primary key(in Views) with zeroes to appease their desire to make the control number sophisticated,smart and attractive. But they wanted it as: first 2 digits as client code, then 4 digits as year year, then last 4 digits as transaction number on that client on a given year, then reset the transaction number of client to 1 when next year flows. Each client's transaction starts with 1. e.g. WM20090001, WM20090002, BB2009001, WM20100001, BB20100001 But as I wanted to make things as simple as possible, I forgo embedding their suggested smartness in primary key, I just keep the primary key auto increments regardless of client and year. But to make it not dull-looking(they really are adamant to make the primary key as smart control number), I made the primary key appears to them smart, on view query, I put the client code and four digit year code on front of the eight-zero padded autoincrement key, i.e. WM200900000001. Sort of slug-like information on autoincremented primary key. Keeping primary key autoincrement regardless of any other information, we are able keep other potential side effects problem when they edit a record, for example, if they made a mistake of entering the transaction on WM, then they edit the client code to BB, if we use smart primary key, the primary keys of WM customer will have gaps in their control number. Or worse yet, instead of letting the control numbers have gaps/holes, the user will request that subsequent records of that gap should shift up to that gap and have their subsequent primary keys re-adjust(decremented). How do you deal with these user requests(reasonable or otherwise)? Do you yield to their request? Or just continue using dumb primary key and explain them the repercussions of having a very smart/sophisticated primary key and educate them the significant advantages of having a dumb primary key? P.S. quotable quote(http://articles.techrepublic.com.com/5100-10878_11-1044961.html): "If you hold your tongue the first time users ask what is for them a reasonable request, things will work a lot better in the end."

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• Java: What are the various available security settings for applets

  - by bguiz

  I have an applet that throws this exception when trying to communicate with the server (running on localhost). This problem is limited to Applets only - a POJO client is able to communicate with the exact same server without any problem. Exception in thread "AWT-EventQueue-1" java.security.AccessControlException: access denied (java.net .SocketPermission 127.0.0.1:9999 connect,resolve) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) My applet.policy file's contents is: grant { permission java.security.AllPermission; }; My question is what are the other places where I need to modify my security settings to grant an Applet more security settings? Thank you. EDIT: Further investigation has lead me to find that this problem only occurs on some machines - but not others. So it could be a machine level (global) setting that is causing this, rather than a application-specific setting such as the one in the applet.policy file. EDIT: Another SO question: Socket connection to originating server of an unsigned Java applet This seems to describe the exact same problem, and Tom Hawtin - tackline 's answer provides the reason why (a security patch released that disallows applets from connecting to localhost). Bearing this in mind, how do I grant the applet the security settings such that in can indeed run on my machine. Also why does it run as-is on other machines but not mine?

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• Correctly assigning value to a Core Data attribute with an integer data-type

  - by Gordon Fontenot

  I'm missing something here, and feeling like an idiot about it. I'm using a UIPickerView in my app, and I need to assign the row number to a 32-bit integer attribute for a Core Data object. To do this, I am using this method: -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { object.integerValue = row; } This is giving me a warning: warning: passing argument 1 of 'setIntegerValue:' makes pointer from integer without a cast What am I mixing up here? --Edit 1-- Ok, so I can get rid of the warning by changing the method to do the following: NSNumber *number = [NSNumber numberWithInteger:row]; object.integerValue = rating; However, I still get a value of 0 for object.integerValue if I use NSLog to print it out. object.integerValue has a max value of 5, so I print out number instead, and then I'm getting a number above 62,000,000. Which doesn't seem right to me, since there are 5 rows. If I NSLog the row variable, I get a number between 0 and 5. So why do I end up with a completely different number after casting the number to NSNumber? --Edit 2-- Ok, so I'm realizing that there is some fundamental idea that I don't understand. I now understand that the 60 million + number can be cast back to the correct 0-5 number by using integerValue. So, it seems my question is how can I save an integer between 0-5 to the attribute if the NSNumber that is returned is over 60 million? Do I need to be using a different data type?

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• Sorting tasks to assign

  - by Diego

  I've got a problem that I don't know where to start. I'd realy appreciate some help. The problem: I have several T task that must be done in D days by just 1 employee (let's forget using several resources right now). Each task can be done in some times (not all tasks can be done all time). e.g.: If my employee starts working at 8 o'clock and one task is "call a client". Maybe the client office opens at 9 o'clock. Also each task has a duration (really estimated). It is supposed that the D days are enough to do all task. I've to sort the tasks to the employee. e.g.: at monday 8:00 do task 7, then at 9:30 starts with task 2. In the example task 7 duration would be 1 and a half hour. Thanks for the help! Diego PD: If someone has a way to make this and it is not an algorithm never minds, please answer and I'll manage to think the algorithm. I just don't know how to face the problem. Edit Would Project be usefull? Edit 2 Tasks / Jobs dependency is NOT required

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• Fast string suffix checking in C# (.NET 4.0)?

  - by ilitirit

  What is the fastest method of checking string suffixes in C#? I need to check each string in a large list (anywhere from 5000 to 100000 items) for a particular term. The term is guaranteed never to be embedded within the string. In other words, if the string contains the term, it will be at the end of the string. The string is also guaranteed to be longer than the suffix. Cultural information is not important. These are how different methods performed against 100000 strings (half of them have the suffix): 1. Substring Comparison - 13.60ms 2. String.Contains - 22.33ms 3. CompareInfo.IsSuffix - 24.60ms 4. String.EndsWith - 29.08ms 5. String.LastIndexOf - 30.68ms These are average times. [Edit] Forgot to mention that the strings also get put into separate lists, but this is not important. It does add to the running time though. On my system substring comparison (extracting the end of the string using the String.Substring method and comparing it to the suffix term) is consistently the fastest when tested against 100000 strings. The problem with using substring comparison though is that Garbage Collection can slow it down considerably (more than the other methods) because String.Substring creates new strings. The effect is not as bad in .NET 4.0 as it was in 3.5 and below, but it is still noticeable. In my tests, String.Substring performed consistently slower on sets of 12000-13000 strings. This will obviously differ between systems and implementations. [EDIT] Benchmark code: http://pastebin.com/smEtYNYN

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• Is there more to HTML forms than http://www.w3schools.com/html/html_forms.asp ?

  - by mawg

  I am creating a form designer. It will generate PHP code which will produce an HTML form. Users will fill in fields and the PHP will store user input in a MySql database (and, of course, they can use the designer to generate forms which query the database). I am using Borland C++ Builder (very similar to Delphi & and you can get the same idea from VB, MSVC, Qt ... any IDE with a RAD GUI designer). Looking at the W3C page http://www.w3schools.com/html/html_forms.asp it seems that the components I can use for my form and retrieve data from are - edit box / TEdit / <input type="text" - memo / TMemo / <input type="textarea" - check box / TCheckBox / <input type="CheckBox" - Combo box / TComboBox / <select ... <option... - Radio group / TRadioGroup / <input type="radio" - Group box / TGroupBox / <fieldset ... <legend ... - Panel / TPanel / <fieldset ... I am unsure whether to allow button / TButton/ input type="button" - other than a single submit button which my form designer program automatically adds to the end of the generated form. But my real question is - did I miss any? It might be nice to have masked edit which only accepts numbers, or maybe some form of "spin control" (TUpDown, or slider + linked read only TEdit), so that the user can click & hold to increment/decrement an integer value. And a calendar component would be nice. Very important: I want to implement it all server-side in PHP, so no client-side JS or Ajax or the likes. If there anything else that I can add to make my generated forms look more impressive in the browser?

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• Rails: Should partials be aware of instance variables?

  - by Alexandre

  Ryan Bates' nifty_scaffolding, for example, does this edit.html.erb <%= render :partial => 'form' %> new.html.erb <%= render :partial => 'form' %> _form.html.erb <%= form_for @some_object_defined_in_action %> That hidden state makes me feel uncomfortable, so I usually like to do this edit.html.erb <%= render :partial => 'form', :locals => { :object => @my_object } %> _form.html.erb <%= form_for object %> So which is better: a) having partials access instance variables or b) passing a partial all the variables it needs? I've been opting for b) as of late, but I did run into a little pickle: some_action.html.erb <% @dad.sons.each do |a_son| %> <%= render :partial => 'partial', :locals => { :son => a_son } %> <% end %> _partial.html.erb The son's name is <%= son.name %> The dad's name is <%= son.dad.name %> son.dad makes a database call to fetch the dad! So I would either have to access @dad, which would be going back to a) having partials access instance variables or I would have to pass @dad in locals, changing render :partial to <%= render :partial = 'partial', :locals = { :dad = @dad, :son = a_son } %, and for some reason passing a bunch of vars to my partial makes me feel uncomfortable. Maybe others feel this way as well. Hopefully that made some sense. Looking for some insight into this whole thing... Thanks!

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• iPhone - is it IMPOSSIBLE to grab the contents of a CALayers composition?

  - by Mike

  I have a CALayer transformed in 3D on a offscreen UIView (much larger than 320x480). How do I dump what is seen on this UIView to a UIImage? NOTE: I Have edited the question to include this code... This is how I create the layer... CGRect area = CGRectMake (0,0,400,600]; vista3D = [[UIView alloc] initWithFrame:area ]; [self.view addSubview:vista3D]; [vista3D release]; transformed = [CALayer layer]; transformed.frame = area; [vista3D.layer addSublayer:transformed]; CALayer *imageLayer = [CALayer layer]; imageLayer.doubleSided = YES; imageLayer.frame = area; imageLayer.transform = CATransform3DMakeRotation(40 * M_PI / 180.0f, 1.0f, 0.0f, 0.0f); imageLayer.contents = (id)myRawImage.CGImage; [transformed addSublayer:imageLayer]; // Add a perspective effect CATransform3D initialTransform = transformed.sublayerTransform; initialTransform.m34 = 1.0 / -500; transformed.sublayerTransform = initialTransform; // now the layer is in perspective // my next step is to "flatten" the composition into a UIImage UIImage *thisIsTheResult = some magic command thanks for any help! EDIT 1: I have tried jessecurry solution but it gives me a flat layer without any perspective. EDIT 2: I discovered a partial solution for this that works, but this solution gives me an image the size of the screen and I was looking for obtaining a higher resolution version, rendering off screen.

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• Show models.ManyToManyField as inline, with the same form as models.ForeignKey inline

  - by Kristian

  I have a model similar to the following (simplified): models.py class Sample(models.Model): name=models.CharField(max_length=200) class Action(models.Model): samples=models.ManyToManyField(Sample) title=models.CharField(max_length=200) description=models.TextField() Now, if Action.samples would have been a ForeignKey instead of a ManyToManyField, when I display Action as a TabularInline in Sample in the Django Admin, I would get a number of rows, each containing a nice form to edit or add another Action. However; when I display the above as an inline using the following: class ActionInline(admin.TabularInline): model=Action.samples.through I get a select box listing all available actions, and not a nifty form to create a new Action. My question is really: How do I display the ManyToMany relation as an inline with a form to input information as described? In principle it should be possible since, from the Sample's point of view, the situation is identical in both cases; Each Sample has a list of Actions regardless if the relation is a ForeignKey or a ManyToManyRelation. Also; Through the Sample admin page, I never want to choose from existing Actions, only create new or edit old ones.

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• OleDb database to DataSet and back in c#?

  - by Troy

  I'm writing a program that lets a user: Connect to an (arbitrary) View all of the tables in that database in separate DataGridViews Edit them in the program, generate random data, and see the results Choose to commit those changes or revert So I discovered the DataSet class, which looks like it's capable of holding everything that a database would, and I decided that the best thing to do here would be to load everything into one dataset, let the user edit it, and then save the dataset back to the database. The problem is that the only way I can find to load the database tables is this: set = new DataSet(); DataTable schema = connection.GetOleDbSchemaTable( OleDbSchemaGuid.Tables, new string[] { null, null, null, "TABLE" }); foreach (DataRow row in schema.Rows) { string tableName = row.Field<string>("TABLE_NAME"); DataTable dTable = new DataTable(); new OleDbDataAdapter("SELECT * FROM " + tableName, connection).Fill(dTable); dTable.TableName = tableName; set.Tables.Add(dTable); } while it seems like there should be a simpler way given that datasets appear to be designed for exactly this purpose. The real problem though is when I try saving these things. In order to use the OleDbDataAdapter.Update() method, I'm told that I have to provide valid INSERT queries. Doesn't that kind of negate the whole point of having a class to handle this stuff for me? Anyway, I'm hoping somebody can either explain how to load and save a database into a dataset or maybe give me a better idea of how to do what I'm trying to do. I could always parse the commands together myself, but that doesn't seem like the best solution.

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• Qt, no such slot error

  - by Martin Beckett

  I'm having a strange problem with slots in Qt4.6 I have a tree control that I am trying to fire an event back to the mainwindow to edit something. I have boiled it down to this minimal example: class MainWindow : public QMainWindow { Q_OBJECT public: MainWindow(int argc, char **argv ); private Q_SLOTS: void about() {QMessageBox::about(this, "about","about"); } // Just the defaul about box void doEditFace() {QMessageBox::about(this, "test","doEditFace"); } // pretty identical .... } class TreeModel : public QAbstractItemModel { Q_OBJECT Q_SIGNALS: void editFace(); ... } In my Mainwindow() I have connect(treeModel, SIGNAL(editFace()), this, SLOT(about())); // returns true connect(treeModel, SIGNAL(editFace()), this, SLOT(doEditFace())); // returns false When I run it the second line gives a warning. Object::connect: No such slot MainWindow::doEditFace() in \src\mainwindow.cpp:588 As far as I can see the doEditFace() is in the moc_ qmeta class perfectly correctly. And the edit event fires and pops up the about box. The order doesn't matterm if I connect the about box second it still works but my slot doesnt! vS2008 windowsXP qt4.6.2

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• Returning ifstream in a function

  - by wrongusername

  Here's probably a very noobish question for you: How (if at all possible) can I return an ifstream from a function? Basically, I need to obtain the filename of a database from the user, and if the database with that filename does not exist, then I need to create that file for the user. I know how to do that, but only by asking the user to restart the program after creating the file. I wanted to avoid that inconvenience for the user if possible, but the function below does not compile in gcc: ifstream getFile() { string fileName; cout << "Please enter in the name of the file you'd like to open: "; cin >> fileName; ifstream first(fileName.c_str()); if(first.fail()) { cout << "File " << fileName << " not found.\n"; first.close(); ofstream second(fileName.c_str()); cout << "File created.\n"; second.close(); ifstream third(fileName.c_str()); return third; //compiler error here } else return first; } EDIT: sorry, forgot to tell you where and what the compiler error was: main.cpp:45: note: synthesized method ‘std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(const std::basic_ifstream<char, std::char_traits<char> >&)’ first required here EDIT: I changed the function to return a pointer instead as Remus suggested, and changed the line in main() to "ifstream database = *getFile()"; now I get this error again, but this time in the line in main(): main.cpp:27: note: synthesized method ‘std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(const std::basic_ifstream<char, std::char_traits<char> >&)’ first required here

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• extracting SWF gives compiler errors in adobe flash CS4

  - by Andy

  Hey, I have been given an SWF to edit a link in the AS code. The fact is the SWF uses some XML that is generated (actually retrieved) by PHP code from a database. menuXML.load("/sub/page/dynamic.php?genre=" + genre); so the point is we can use the same SWF 'mainfraim' and fill them with different animations/sources based on the link provided in dynamic.php?genre=### Now, I've used Flash Decompiler Gold to extract all files in the SWF and can open it again in Adobe Flash to edit it. When done I enter CTRL+ENTER and there are immediately 4 compiler errors!! Errors: 1x < Unexpected 'if' encountered 2x < Statement block must be terminated by '}' 1x < Ecpected a field name after '.' operator. How can these errors be present, when the original SWF works perfectly??! If I don't manage to solve this, I'll have to find out how to create an .php file the SWF tries to use which can select the proper resources (from a database I guess) to show them (using ?genre=###) Thanks!

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