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  • Why my custom CStatic derived control does not receive WM_SIZE message?

    - by Michael P
    Hello everyone! I'm currently developing a custom control that derives from CStatic MFC class (Smart Device C++ project). I have created the control class using VC++ MFC class wizard, selecting CStatic class as its base class. I have used Class View to add OnSize event handler for my control class (I have selected WM_SIZE message from messages list), and new OnSize method has been created by Visual Studio along with ON_WM_SIZE() statement between BEGIN_MESSAGE_MAP(...) and END_MESSAGE_MAP(). The problem is that my control does not receive WM_SIZE thus OnSize method is never called - I used MoveWindow to change size of my control - its size changes as I have seen on dialog window but WM_SIZE message is never being sent. When I send WM_SIZE through SendMessage or PostMessage function - the control OnSize method is called normally. What do I wrong? I've read MSDN docs about CStatic control and there is no information that WM_SIZE message is never sent to a static control window. Sorry for my bad English.

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  • inheritance and hidden overloads

    - by Caspin
    The following code doesn't compile. struct A {}; struct B {}; class Base { public: virtual void method( A param ) { } virtual void method( B param ) = 0; }; class Derived : public Base { public: //using Base::method; void method( B param ) { } }; int main() { Derived derived; derived.method(A()); } The compiler can't find the overload of method() that has an A parameter. The 'fix' is to add a using declaration in the derived class. My question is why. What is the rational for a weird language rule like this? I verified the error in both GCC and Comeau, so I assume this isn't a compiler bug but a feature of the language. Comeau at least gives me this warning: "ComeauTest.c", line 10: warning: overloaded virtual function "Base::method" is only partially overridden in class "Derived" class Derived : public Base ^

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  • In Objective C, is there a way to call reference a typdef enum from another class?

    - by Adrian Harris Crowne
    It is my understanding that typedef enums are globally scoped, but if I created an enum outside of the @interface of RandomViewController.h, I can't figure out how to access it from OtherViewController.m. Is there a way to do this? So... "RandomViewController.h" #import <UIKit/UIKit.h> typedef enum { EnumOne, EnumTwo }EnumType; @interface RandomViewController : UIViewController { } and then... "OtherViewController.m" -(void) checkArray{ BOOL inArray = [randomViewController checkArray:(EnumType)EnumOne]; }

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  • How do I create something like a negated character class with a string instead of characters?

    - by Chas. Owens
    I am trying to write a tokenizer for Mustache in Perl. I can easily handle most of the tokens like this: #!/usr/bin/perl use strict; use warnings; my $comment = qr/ \G \{\{ ! (?<comment> .+? ) }} /xs; my $variable = qr/ \G \{\{ (?<variable> .+? ) }} /xs; my $text = qr/ \G (?<text> .+? ) (?= \{\{ | \z ) /xs; my $tokens = qr/ $comment | $variable | $text /x; my $s = do { local $/; <DATA> }; while ($s =~ /$tokens/g) { my ($type) = keys %+; (my $contents = $+{$type}) =~ s/\n/\\n/; print "type [$type] contents [$contents]\n"; } __DATA__ {{!this is a comment}} Hi {{name}}, I like {{thing}}. But I am running into trouble with the Set Delimiters directive: #!/usr/bin/perl use strict; use warnings; my $delimiters = qr/ \G \{\{ (?<start> .+? ) = [ ] = (?<end> .+?) }} /xs; my $comment = qr/ \G \{\{ ! (?<comment> .+? ) }} /xs; my $variable = qr/ \G \{\{ (?<variable> .+? ) }} /xs; my $text = qr/ \G (?<text> .+? ) (?= \{\{ | \z ) /xs; my $tokens = qr/ $comment | $delimiters | $variable | $text /x; my $s = do { local $/; <DATA> }; while ($s =~ /$tokens/g) { for my $type (keys %+) { (my $contents = $+{$type}) =~ s/\n/\\n/; print "type [$type] contents [$contents]\n"; } } __DATA__ {{!this is a comment}} Hi {{name}}, I like {{thing}}. {{(= =)}} If I change it to my $delimiters = qr/ \G \{\{ (?<start> [^{]+? ) = [ ] = (?<end> .+?) }} /xs; It works fine, but the point of the Set Delimiters directive is to change the delimiters, so the code will wind up looking like my $variable = qr/ \G $start (?<variable> .+? ) $end /xs; And it is perfectly valid to say {{{== ==}}} (i.e. change the delimiters to {= and =}). What I want, but maybe not what I need, is the ability to say something like (?:not starting string)+?. I figure I am just going to have to give up being clean about it and drop code into the regex to force it to match only what I want. I am trying to avoid that for four reasons: I don't think it is very clean. It is marked as experimental. I am not very familier with it (I think it comes down to (?{CODE}) and returning special values. I am hoping someone knows some other exotic feature that I am not familiar with that fits the situation better (e.g. (?(condition)yes-pattern|no-pattern)). Just to make things clear (I hope), I am trying to match a constant length starting delimiter followed by the shortest string that allows a match and does not contain the starting delimiter followed by a space followed by an equals sign followed by the shortest string that allows a match that ends with the ending delimiter.

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  • How do I build a hello world class with maven?

    - by httpinterpret
    Now the source code is ready, how can I build it with maven? Suppose the source file is hw.java I've googled some time, all the solutions requires me to set the directory in a fixed manner. But what I want to do is keep hw.java in current directory (.), and then: vi pom.xml ... mkdir build cd build maven ... Can I have that kind of freedom with maven?

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  • How do I use the information about exceptions a method throws in .NET in my code?

    - by dotnetdev
    For many methods in .NET, the exceptions they can potentially throw can be as many as 7-8 (one or two methods in XmlDocument, Load() being one I think, can throw this many exceptions). Does this mean I have to write 8 catch blocks to catch all of these exceptions (it is best practise to catch an exception with a specific exception block and not just a general catch block of type Exception). How do I use this information? Thanks

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  • Scala: is it possible to override default case class constructor?

    - by adam77
    Just wondering if this is possible. What I would actually like to do is check and possibly modify one of the arguments before it is stored as a val. Alternatively, I could use an overload and make the default constructor private. In which case I would also like to make private the default factory constructor in the companion object, how would I do that? Many thanks. Adam

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  • Need help coming up with a better HtmlHelper Extension method.

    - by zSysop
    Hi all, I've inherited the following code and i was wondering if i could pick at your brains to see if there's a nicer way to do duplicate this. Heres the html for most of our partial input views <% if (Html.IsInputReadOnly()) { %> <td> Id </td> <td> <%= Html.TextBox( "Id" , (Model == null ? null : Model.Id) , new { @readonly = "readonly", @disabled="disabled" } )%> <% } elseif (Html.IsInputDisplayable() == false) { %> <td></td> <td></td> <% } else { %> <td>Id</td> <td><%= Html.TextBox("Id")%> <%= Html.ValidationMessage("Id", "*")%> </td> <%} %> Here are my entension methods public static bool IsInputReadOnly(this HtmlHelper helper) { string actionName = ActionName(helper); // The Textbox should be read only on all pages except for the lookup page if (actionName.ToUpper().CompareTo("EDIT") == 0) return true; return false; } public static bool IsInputDisplayable(this HtmlHelper helper) { string actionName = ActionName(helper); // The Textbox should be read only on all pages except for the lookup page if (actionName.ToUpper().CompareTo("CREATE") == 0) return true; return false; } Thanks in advance

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  • Questions on method to use: Facebook Business Page with Flash or Facebook Application?

    - by Jay
    Hi there, I'm new to Facebook's Graph API / FBML / etc. So if at any point in my post I make a mistake or wrong assumption, please point them out. One of the projects that I am working on has a need to get data/info from an existing web site in addition to the friends list and such that FB can provide. This is for a platform that allows people from all over the world to help out in small scale projects that will benefit various communities. These projects are usually to help out people in unfortunate / less than ideal situations / living conditions so that their environment improves. You can read about it in detail at http://www.getitdone.org. The initial idea was to develop a Business Page (this is the same as a Fan Page right?) for each Project with a Static FBML tag to do the displaying. However, iframes are not allowed in Pages (as far as I know, iframes are only allowed in an FB Application). So it is no longer possible to get data from the web site to be displayed in the FB Page. So one of the options is to embed a Flash in the Page's Tab. I am fairly certain that the Flash can retrieve data on the User's friends and connections in an Application's context (because of all of those darn FB games that I'm addicted to :p). However, I would like to confirm if it can do the same if it's embedded in a Business Page's Tab. Could someone please confirm on this issue? The other option that we arrived at was (if the earlier options fails) to have an Application built instead. However, this means that we would need to create an Application for each Project. Not an ideal situation. Is there any other option that we have missed that can help us achieve the desired result with as little hassle as possible? Any help that you can provide on this matter is most welcome. Thank you.

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  • How to detect a WCF session crash before calling a contract method?

    - by brain_pusher
    I am using a session mode for my WCF service. The problem is the following: if session is broken and no longer exists, client can't know it before calling a contract. For example, if the service has been restarted, the client's session id is invalid, because that session has been closed on the server side. I check the channel state before calling the contract and its value is CommunicationState.Opened even if session is already broken. So, when I call the contract after this check I get a CommunicationException with this message: The remote endpoint no longer recognizes this sequence. This is most likely due to an abort on the remote endpoint. The value of wsrm:Identifier is not a known Sequence identifier. The reliable session was faulted. Is there any workaround? I need a way to get an appropriate session state before calling a contract so that I can restore it without getting an exception. P.S. The CommunicationException type is general, so I can't detect a session crash by catching this exception. P.P.S. I have asked the similar question here, but in that case I didn't know the reason, now I don't know how to evade it.

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  • Does the 'dynamic' keyword and the DLR promote C# to a first class citizen as a dynamically typed la

    - by Quigrim
    I understand that the new ‘dynamic’ keyword in C# 4.0 facilitates interaction with dynamic .NET languages, and can help to cut code by using it instead of reflection. So usage is for very specific situations. However, what I would like to know is if it will give C# all the dynamic benefits that one would get in other dynamic languages such is the IronXXX languages? In other words, will it be possible to write a entire application in C# in a dynamic language style? And if it is possible, would it be recommended or not. And why, or why not respectively? Will I get all the benefits of a dynamic language without switching to another language?

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  • Testing with Qt's QTestLib module

    - by ak
    Hi I started writing some tests with Qt's unit testing system. How do you usually organize the tests? It is one test class per one module class, or do you test the whole module with a single test class? Qt docs (or some podcast that I recently watched) suggested to follow the former strategy. I want to write tests for a module. The module provides only one class that is going to be used by the module user, but there is a lot of logic abstracted in other classes, which I would also like to test, besides testing the public class. The problem is that Qt's proposed way to run tests involved the QTEST_MAIN macro: QTEST_MAIN(TestClass) #include "test_class.moc" and eventually one test program is capable of testing just one test class. And it kinda sucks to create test projects for every single class in the module. Of course, one could take a look at the QTEST_MAIN macro, rewrite it, and run other test classes. But is there something, that works out of the box?

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  • Which build tool to teach?

    - by Helper Method
    While similiar questions have been asked, this one's focused on which is best/easiest to teach. I'm giving a weekly tutorial at my university focusing on data structures and algorithms. Fromn time to time I introduce tools which may prove helpful in future projects like JUnit, Mercurial, Eclipse etc.. I plan to show them some kind of build tool but I'm not sure which one to choose. I by myself have very little knowledge about build tools, except a little experience in using make. It's more the concept of a build tool I want to show them, not a special tool per se. Which would be the most easiest/future proof/whatever tool to show them? I've read a little bit about Gradle, which looks nice, but so far I think Ant could be a good choice (it's a Java course I'm giving).

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  • Problem with lazy loading implementation

    - by Mehran
    Hi, I have implemented lazy loading in my program. it's done through a proxy class like: class Order { public virtual IList<Item> Items {get; set;} } class OrderProxy { public override IList<Item> Items { get { if (base.Items == null) Items = GetItems(base.OrderID); return base.Items; } set { base.Items = value; } } } the problem is that whenever i instantiate proxy class,without even touching the Items property, it tries to load Items! as you may know,i want to instantiate proxy class and return the instance to BLL instead of domain object itself. what's the problem? Does .NET CLR access(read) properties in a class, when it's instatiating the class? any other methods? Thanks

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  • Extending an entity

    - by Kim L
    I have class named AbstractUser, which is annotated with @MappedSuperclass. Then I have a class named User (@Entity) which extends AbstractUser. Both of these exist in a package named foo.bar.framework. When I use these two classes, everything works just fine. But now I've imported a jar containing these files to another project. I'd like to reuse the User class and expand it with a few additional fields. I thought that @Entity public class User extends foo.bar.framework.User would do the trick, but I found out that this implementation of the User only inherits the fields from AbstractUser, but nothing from foo.bar.framework.User. The question is, how can I get my second User class to inherit all the fields from the first User entity class? Both User class implementation have different table names defined with @Table(name = "name").

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  • What's the best method in ASP.NET to obtain the current domain?

    - by Graphain
    Hi, I am wondering what the best way to obtain the current domain is in ASP.NET? For instance: http://www.domainname.com/subdir/ should yield http://www.domainname.com http://www.sub.domainname.com/subdir/ should yield http://sub.domainname.com As a guide, I should be able to add a url like "/Folder/Content/filename.html" (say as generated by Url.RouteUrl() in ASP.NET MVC) straight onto the URL and it should work.

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  • magento XML RPC problem Class 'Zend_Http_Client' not found in...

    - by thrice801
    Hi, Any idea on what would make this happen? Im trying to use XML RPC zend version but anytime I try to include the client I get some sort of error. Its like its including the client, but then the client does not know how to include the files after that... test connect script is located in root directory, with the following - require_once 'lib/Zend/XmlRpc/Client.php'; $client = new Zend_XmlRpc_Client('http://mydomain.com/api/xmlrpc/'); Any help would be appreciated!

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  • What signing method to use for public open-source projects?

    - by Irchi
    I'm publishing an open-source library on CodePlex, and want the dll files to have strong names so that they can be added to GAC. What's the best option for signing? Should I use SNK? If so, everyone have access to the key. I don't have a problem with everyone having access, but is it a good approach? Should I use PFX? If so, does it mean that other people downloading the source code are not able to build the solution? What I like to do is that I am the only one person to have access to the key, so that the signed assemblies also have a level of authenticity, but meanwhile don't prevent other developers to download, build, or change the source code for themselves, and be able to post changes for the main project.

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  • Please explain this Rails method to me like I'm a little kid.

    - by Senthil
    I found this in Ryan Bates' railscast site, but not sure how it works. #models/comment.rb def req=(request) self.user_ip = request.remote_ip self.user_agent = request.env['HTTP_USER_AGENT'] self.referrer = request.env['HTTP_REFERER'] end #blogs_controller.rb def create @blog = Blog.new(params[:blog]) @blog.req = request if @blog.save ... I see he is saving the user ip, user agent and referrer, but am confused with the req=(request) line. Any help is appreciated. Thanks

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