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• Using GoogleMaps with JXMapKit

  - by npinti

  I have been searching on the web to see if I can use GoogleMaps with the JXMapViewer. According to this, it is illegal, but the article is more than three years old. Could anyone be kind enough to tell me if I can use GoogleMaps with the JXMap viewer? I know that Google has recently allowed desktop applications to use their static maps provided that the application is freely accessible to people on some website. If this can be done, I would appreciate some pointer to where I could start looking so that I can use Google Maps, I tried messing around with this but to no avail. Thanks in advance. Edit: I have managed to show a map in my JXMapKit. The only problem is that I am getting the image as a tiled image, whilst I only need one. Any help on this issue?

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• Please explain some of Paul Graham's points on LISP

  - by kunjaan

  I need some help understanding some of the points from Paul Graham's article http://www.paulgraham.com/diff.html A new concept of variables. In Lisp, all variables are effectively pointers. Values are what have types, not variables, and assigning or binding variables means copying pointers, not what they point to. A symbol type. Symbols differ from strings in that you can test equality by comparing a pointer. A notation for code using trees of symbols. The whole language always available. There is no real distinction between read-time, compile-time, and runtime. You can compile or run code while reading, read or run code while compiling, and read or compile code at runtime. What do these points mean How are they different in languages like C or Java? Do any other languages other than LISP family languages have any of these constructs now?

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• INetCfgComponent::RaisePropertyUi arguments

  - by Soo Wei Tan

  I'm trying to do some COM interop and attempting to invoke the INetCfgComponent::RaisePropertyUi method. I've gotten to the point where I can enumerate devices and get a valid INetCfgComponent for the adapter that I want to display the UI for. However, I'm a COM newbie (let alone COM interop) so I have no idea what the third argument in RaisePropertyUi() is meant to be. I've tried passing in the INetCfgComponent object that I have, but that just results in a InvalidCastException. MSDN has the following to say about the argument: Pointer to the IUnknown interface. RaisePropertyUi retrieves from IUnknown the interface of the context in which to display a network component's property sheet. RaisePropertyUi uses this interface to restrict the display of the property sheet to the context of a connection.

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• What does this mean: warning: converting from ‘void (ClassName::*)()’ to ‘void (*)()’

  - by Brendan Long

  I have a member function in a class that has a callback, but the callback isn't strictly neccessary, so it has a default callback, which is empty. It seems to work fine, but I get an annoying warning: warning: converting from ‘void (ClassName::*)()’ to ‘void (*)()’ I'm trying to figure out what it means and how to turn it off (or fix it if I really am doing something wrong). Here's some simple code: class ClassName{ public: void doSomething(void (*callbackFunction)() = (void(*)()) &ClassName::doNothing){ callbackFunction(); } void doNothing(){} }; int main(){ ClassName x; x.doSomething(); return 0; } Note: If I do this (without explicitly casting it as a void(*)()): void doSomething(void (*callbackFunction)() = &ClassName::doNothing) I get this: main.cpp:3: error: default argument for parameter of type ‘void (*)()’ has type ‘void (ClassName::*)()’

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• How to integrate KVC in MVC?

  - by Paperflyer

  So I have an MVC-application in Cocoa. There are some custom views, a controller and a model. Of course, the views need to know some stuff, so they get their data from the controller. However, they do not use accessors in the controller, they use KVC with a keypath that calls right through to the model: // In view.m time = [timeSource valueForKeyPath:@"theModel.currentTime"]; // timeSource is a pseudo-delegate of the view that holds the controller This simplifies things a great deal and technically, the views still don't know the model in person (that is, in pointer). But of course, they access it directly. Is that a usual (or at least sensible) usage of KVC and MVC? Or how would you implement this kind of communication?

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• Calling cli::array<int>::Reverse via a typedef in C++/CLI

  - by Vulcan Eager

  Here is what I'm trying: typedef cli::array<int> intarray; int main(){ intarray ^ints = gcnew intarray { 0, 1, 2, 3 }; intarray::Reverse(ints); // C2825, C2039, C3149 return 0; } Compilation resulted in the following errors: .\ints.cpp(46) : error C2825: 'intarray': must be a class or namespace when followed by '::' .\ints.cpp(46) : error C2039: 'Reverse' : is not a member of '`global namespace'' .\ints.cpp(46) : error C3149: 'cli::array<Type>' : cannot use this type here without a top-level '^' with [ Type=int ] Am I doing something wrong here?

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• Does the EntityDataSource support "it.Property.Property" syntax?

  - by Orion Adrian

  I have an EntityDataSource where I'm trying to replace some previous code-behind work. My EntityDataSource looks like: <asp:EntityDataSource runat="server" ID="personDataSource" ContextTypeName="Model.GuidesEntities" EntitySetName="CharacterFavorites" OrderBy="it.Person.FullName" Select="it.Person.Id" Where="it.UserName = @userName" /> When when I actually use it I get the error: 'Person' is not a member of type 'Transient.rowtype[(Id,Edm.Int32(Nullable=True,DefaultValue=))]' in the currently loaded schemas. Does the EntityDataSource not support walking the relationships? How would you do this with the EntityDataSource? Also the @userName parameter is being added in the code behind for now. Extra points for anyone who knows how to specify a username parameter directly in the WhereParameters collection.

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• [Principles] Concrete Type or Interface for method return type?

  - by SDReyes

  In general terms, whats the better election for a method's return type: a concrete type or an interface? In most cases, I tend to use concrete types as the return type for methods. because I believe that an concrete type is more flexible for further use and exposes more functionality. The dark side of this: Coupling. The angelic one: A concrete type contains per-se the interface you would going to return initially, and extra functionality. What's your thumb's rule? Is there any programming principle for this? BONUS: This is an example of what I mean http://stackoverflow.com/questions/491375/readonlycollection-or-ienumerable-for-exposing-member-collections

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• Does ActiveCollab subversion integration work with subversion over ssh?

  - by executor21

  I'm trying to setup a repository in an ActiveCollab project. During setup, it reports that the connection tests successfully. However, when I try to actually update the repository, I get the following message: Could not obrain the highest revision number for the given repository. If I try to browse the repository, the following error comes up: Fatal error: Call to a member function getRevision() on a non-object in /u/sites/activecollab/webroot/shared/activecollab/activecollab/application/modules/source/controllers/RepositoryController.class.php on line 357 Is this because of trying to access the repository via svn+ssh plugin rather than http? Or did something happen on the ActiveCollab end? The repository is accessed fine via other means -- only ActiveCollab has the problem.

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• Can I turn off context menu scrolling in VS2010?

  - by Jane McDowell

  When I right-click in the middle of a code editor window in Visual Studio 2010 RTM, a context menu appears. This takes up about a fourth the height of the screen but doesn't show all options. Instead it scrolls up and down when you move the pointer to the top or bottom of the menu. If I click near the top or bottom of the screen, the menu is normal and doesn't scroll. Can I turn this behavior off? It's stupid. You can't even scroll using the mouse wheel. EDIT I reckon this might just be a bug - I've found a few.

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• How to debug nHibernate/RhinoMocks TypeInitializer exception

  - by Joe Future

  Pulling my hair out trying to debug this one. Earlier this morning, this code was working fine, and I can't see what I've changed to break it. Now, whenever I try to open an nHibernate session, I'm getting the following error: Test method BCMS.Tests.Repositories.BlogBlogRepositoryTests.can_get_recent_blog_posts threw exception: System.TypeInitializationException: The type initializer for 'NHibernate.Cfg.Environment' threw an exception. --- System.Runtime.Serialization.SerializationException: Type is not resolved for member 'Castle.DynamicProxy.Serialization.ProxyObjectReference,Rhino.Mocks, Version=3.5.0.1337, Culture=neutral, PublicKeyToken=0b3305902db7183f'.. Any thoughts on how to debug what's going on here?

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• Embedded file system and sqlite

  - by Jeff Lamb

  I'm working on an embedded project that has no file system, and our kludge of a database has ballooned in functionality. It's now so inefficient, we can't stand it any longer. I'm trying to figure out if there's built-in support for a flat file system in SQLite. I've dug around http://sqlite.org for a while now, but haven't found anything specifically covering it. Has anyone found a supported implementation written in C? It seems like such a straightforward request, but I can't find anything written about it. We have plenty of memory available. In a perfect world, I'd like to just set aside a large portion of it, pass the FS a pointer, then let the FS/SQLite library just use what it wants.

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• What is the correct Qt idiom for exposing signals/slots of contained widgets?

  - by Tyler McHenry

  Suppose I have a MyWidget which contains a MySubWidget, e.g. a custom widget that contains a text field or something. I want other classes to be able to connect to signals and slots exposed by the contained MySubWidget instance. Is the conventional way to do this: Expose a pointer to the MySubWidget instance through a subWidget() method in MyWidget Duplicate the signals and slots of MySubWidget in the MyWidget class and write "forwarding" code Something else? Choice 1 seems like the least code, but it also sort of breaks encapsulation, since now other classes know what the contained widgets of MyWidget are and might become dependent on their functionality. Choice 2 seems like it keeps encapsulation, but it's a lot of seemingly redundant and potentially convoluted code that kind of messes up the elegance of the whole signals and slots system. What is normally done in this situation?

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• How to send native texture ptr from Unity web player to a browser plug-in?

  - by user2928039

  I have written an NPAPI browser plug-in (using Firebreath) that Unity uses to access Kinect camera. I can retrieve skeleton data from Unity through JavaScript easily since it isn't too big but the problem is in retrieving color image data. Is it possible to send a native texture pointer (GetNativeTexturePtr) from Unity through JavaScript into the C++ plug-in so that it can write the texture data directly? (tested in standalone version and it works) Any other suggestions on how to transfer image data from browser plug-ins to Unity web player are very welcome. Thanks.

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• lambda expression based reflection vs normal reflection

  - by bitbonk

  What is the difference between normal reflection and the reflection that can be done with lambda expressions such as this (taken form build your own MVVM): public void NotifyOfPropertyChange<TProperty>(Expression<Func<TProperty>> property) { var lambda = (LambdaExpression)property; MemberExpression memberExpression; if (lambda.Body is UnaryExpression) { var unaryExpression = (UnaryExpression)lambda.Body; memberExpression = (MemberExpression)unaryExpression.Operand; } else memberExpression = (MemberExpression)lambda.Body; NotifyOfPropertyChange(memberExpression.Member.Name); } Is the lambda based reflection just using the normal reflection APIs internally? Or is this something significantly different. What is ther perfomance difference?

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• Why 'initWithObjectsAndKeys:' doesn't throw a casting warning? (NSDictionary)

  - by rubdottocom

  Sorry if the question isn't correct, I'm very new in Objective-C. I understand why this code throw the Warning: "warning: passing argument 1 of 'initWithObjectsAndKeys:' makes pointer from integer without" NSDictionary *dictNames = [[NSDictionary alloc] initWithObjectsAndKeys: 3, @"", 4, @"", 5, @"",nil]; Keys and Values of a NSDictionary must be NSObject and not fundamental types, like the integers 3, 4 and 5. (Correct me if necessary). But I don't understand why this warning dissapears with the only "correct typing" of the first Key. NSDictionary *dictNames = [[NSDictionary alloc] initWithObjectsAndKeys: [NSNumber numberWithInteger:3], @"", 4, @"", 5, @"",nil]; It's because NSDictionary assumes the type of the other Keys? Is correct this manner of initialization?

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• Show CMFCRibbonStatusBar

  - by praetorian20

  Hi, I'm creating a simple SDI app using the new VS2008 service pack. I added ribbon support but all I want on the ribbon are the Open & Close buttons. I commented out all the code that creates the other default buttons and categories but doing this also gets rid of the status bar (CMFCRibbonStatusBar). I can't find what member function is called when I click the checkbox that displays the statusbar in the default generated code. I've tried the following but it doesn't work: m_wndStatusBar.ShowWindow( SW_SHOWNORMAL ); How do I have the status bar showing without having to have the 'Home' category and 'View' panel (with the 'Show status bar' checkbox) being generated? Thanks, Ashish.

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• Storing callbacks in a dictionary (Objective C for the iPhone)

  - by Casebash

  I am trying to store callbacks in a dictionary. I can't use blocks as the iPhone doesn't support this (unless you use plblocks). I tried using functions, but apparently NSMutableDictionary doesn't allow these pointers (wants an id) I tried using class methods, but I couldn't find a way to obtain a pointer to these I could try using functions with the c++ stl hashmap (if it is supported in Objective C++), but apparently this can slow compilation times. I could try storing both a class and a selector, but that seems rather messy. What would be the best way to do this?

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• Can't make wmode: 'transparent' work on sIFR 3

  - by Synue

  I've been trying to use sIFR to change some text in my webpage. It works fine until I try to get it to use a transparent canvas. The code I'm using is as follow. I have no idea to fix it. I've seen a lot of people make this questions about wmode: 'transparent' and it all seems to work but mine. Can someone give me a hand??? Without the wmode: 'transparent' property it works fine. When I include the property it doesn't activate sIFR and we get the page as the normal HTML. sIFR.replace(myriadPro, { selector: '#title1,#title3,#title5,#title7,#title9,#title11,#title13,#title15,#title17,#title19', css: [ '.sIFR-root {background-color:none;font-size:45px;visibility:visible;text-decoration:none;color:#4C4843;cursor:pointer;}' ], wmode: 'transparent' });

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• Load NSImage into QPixmap or QImage

  - by Thomi

  I have an NSImage pointer from a platform SDK, and I need to load it into Qt's QImage class. To make things easier, I can create a QImage from a CGImageRef by using QPixmap as an intermediate format, like this: CGImageRef myImage = // ... get a CGImageRef somehow. QImage img = QPixmap::fromMacCGImageRef(myImage).toImage(); However, I cannot find a way to convert from an NSImage to a CGImageRef. Several other people have had the same problem, but I have yet to find a solution. There is the CGImageForProposedRect method, but I can't seem to get it to work. I'm currently trying this (img is my NSImage ptr): CGImageRef ir = [img CGImageFirProposedRect:0:0:0]; Any ideas?

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• C++ Preprocessor string literal concatenation

  - by ezpz

  I found this regarding how the C preprocessor should handle string literal concatenation (phase 6). However, I can not find anything regarding how this is handled in C++ (does C++ use the C preprocessor?). The reason I ask is that I have the following: const char * Foo::encoding = "\0" "1234567890\0abcdefg"; where encoding is a static member of class Foo. Without the availability of concatenation I wouldnt be able to write that sequence of characters like that. const char * Foo::encoding = "\01234567890\0abcdefg"; Is something entirely different due to the way \012 is interpreted. I dont have access to multiple platforms and I'm curious how confident I should be that the above is always handled correctly - i.e. I will always get { 0, '1', '2', '3', ... }

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• PHP stream_context_set_option SSL certificate as string

  - by Roger Thomas

  I've got a weird issue. Basically, I need to do this: $handle = stream_context_create(); stream_context_set_option($handle , 'ssl', 'local_cert', '/tmp/cert'); However. The certificate is not held as a file within the server. Rather it's an encrypted string held in a clustered database environment. So instead of the certificate being a file name pointer, its the physical content of the certificate. So instead of using the file name, I need to specify the content of the certificate instead. For example: $cert = '-----BEGIN CERTIFICATE-----.... upWbwmdMd61SjNCdtOpZcNW3YmzuT96Fr7GUPiDQ -----END CERTIFICATE-----'; Does anyone have any idea whatsoever how on earth I can do this? I'm scratching my head over this problem, but my gut instinct says it is doable. Thanks in advance everyone!

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• Change parent class of dom object via css selectors

  - by Le_Coeur

  Can i change parent class of some dom object on hover event via CSS selectors? For example I have such block: <span class="wBlock" > <span class="wText">Text</span> <span class="wLink"/> <\/span> and if i move mouse to span "wLink" span "wBlock" must be changed, and if i move out than it must be the same as at the begining .wLink{ padding-right:15px; background:url(/img/addlink.png) center right no-repeat; cursor:pointer; } .wText{ background-color: #1BE968; } It's something like this and if i move my cursor to plus text highlight must be changed to yellow

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• What is the most simple implementation of IDynamicMetaObjectProvider?

  - by Néstor Sánchez A.

  Hi, I have this scenario... 1.- I'm providing a "Dynamic Table" for wich users can define Fields. Each Dynamic Table will have as many rows/records as needed, but the Field definitions are centralized. 2.- My Dynamic Row/Record class was inherited from the .NET DLR DynamicObject class, and the underlying storage was a List appropriately associated to the defining fields. Everything works fine! BUT... 3.- Because I need to Serialize the content, and DynamicObject is not Serializable, I was forced to generate and carry a Dynamic Object when dynamic member access is required. But this is ugly and redundant. So, I need to implement IDynamicMetaObjectProvider myself to achieve dynamic access and serialization together. After googling/binging unsuccessfully I ask for your help... Can anybody please give a good example (or related link) for doing that?

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• dell server display on laptop screen

  - by hari

  Please redirect if this is not (and probably thats true) the correct forum/site. I have a dell server and I am trying to configure it for the first time. It is running windows server 2003. I do not have a monitor screen. Can I use laptop screen to display dell server and set it up? I mean to say is, if I can display dell server on laptop screen, it would be great. I am trying that with a dell laptop but not getting the display. Any help/pointer would be appreciated. Thanks in advance.

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