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  • How to write program to do file transfer based on based omniORBpy

    - by cofthew7
    I'm now writing a Corba project to do file transfering between client and server. But I face trouble when I want to upload file from the client to the server. The IDL I defined is: interface SecretMessage { string send_file(in string file_name, in string file_obj); }; And I implemented the uploading function in the client code: f = open('SB.docx', 'rb') data = '' for piece in read_in_chunks(f): data += piece result = mo.send_file('2.docx', data) If the file is a plain txt file, there is no problem. But if the file is a, like jpg, doc, or others except txt, then it does work. It gives me the error: omniORB.CORBA.BAD_PARAM: CORBA.BAD_PARAM(omniORB.BAD_PARAM_WrongPythonType, CORBA.COMPLETED_NO) Where is the problem?

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  • Android: Where to find the RadioButton Drawable?

    - by Peterdk
    Ok, I am trying to create a custom view called CheckedRelativeLayout. It's purpose is the same as a CheckedTextView, to be able to use it in a list of items you want selected or in a Spinner. It's all working fine now, I extended RelativeLayout and implemented Checkable interface. However, I am stuck on a quite simple problem: Where can I find the Drawable that CheckedTextView and RadioButton use? I looked at the sourcecode of both, and they seem to use com.android.internal.R. Well... that's internal stuff. So I can't access it. Any way to get these Drawables or solve the problem somehow?

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  • Jquery Widget Performance

    - by jamie-wilson
    I am working on an interface which involves ALOT of javascript. There is a calendar and blocks drawn on the calendar. The calendar is a jQuery widget, which works beautifully. The blocks drawn on top are also jQuery widgets. While it works - I am wondering, every time I create another block, is the widget fully duplicating, or is it referencing the widget? If I end up with 200 blocks on the screen, do I have 200 copies of the widget? Because if so i'm sure this will impact the performance quite heavily. Also it would determine whether I have functions inside the widget, or have them external to the widget looking in if that makes sense. Just putting some feelers out there for thoughts. I couldn't find anything by searching online.

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  • UI not redrawing after display powered off on Win 7

    - by oltman
    Some portions of my application's interface are not getting refreshed after Windows 7 powers down the display. More specifically, I'm swapping out images, User Controls, and a button's content while the display is powered off and after it has been restarted, and this isn't being reflected in the UI until I minimize and restore the window or move it to one of the screen's edges. I've tried calling the Window's InvalidateVisual() method when the app was in a state where it needed to redraw, and that didn't solve the problem. I have only been able to reproduce this issue on Windows 7. Any ideas?

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  • Question about member function pointers in a heirarchy

    - by Jesse Beder
    I'm using a library that defines an interface: template<class desttype> void connect(desttype* pclass, void (desttype::*pmemfun)()); and I have a small heirarchy class base { void foo(); }; class derived: public base { ... }; In a member function of derived, I want to call connect(this, &derived::foo); but it seems that &derived::foo is actually a member function pointer of base; gcc spits out error: no matching function for call to ‘connect(derived* const&, void (base::* const&)())’ I can get around this by explicitly casting this to base *; but why can't the compiler match the call with desttype = base (since derived * can be implicitly cast to base *)? Also, why is &derived::foo not a member function pointer of derived?

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  • How to choose the right web application framework?

    - by thenextwebguy
    http://en.wikipedia.org/wiki/Comparison_of_web_application_frameworks Since we are ambitiously aiming to be big, scalability is important, and so are globalization features. Since we are starting out without funding, price/performance and cost of licences/hardware is important. We definitely want to bring AJAX well present in the web interface. But apart from these, there's no further criteria I can come up with. I'm most experienced with C#/ASP.net, PHP and Java, in that order, but don't turn down other languages (Ruby, Python, Scala, etc.). How can we determine from the jungle of frameworks the one that suits best our goal? What other questions should we be asking ourselves? Reference material: articles, book recommendations, websites, etc.?

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  • To Wrap or Not to Wrap: Wrapping Data Access in a Service Facade

    - by PureCognition
    For a while now, my team and I have been wrapping our data access layer in a web service facade (using WCF) and calling it from the business logic layer. Meanwhile, we could simply use the repository pattern where the business logic layer consumes the data access layer locally through an interface, and at any point in time, we can switch things out for it to hit a service instead (if necessary). The question is: When is it a good time to wrap the data access layer in a service facade and when isn't it? Right now, it seems like the main advantage is that other applications can consume the service, but if they are internal applications written in .NET then they can just consume the .NET assembly instead. Are there other advantages of having the DAL be wrapped in a service that I am unaware of?

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  • Matlab: Adding symbols to figure

    - by niko
    Hi, Below is the user interface I have created to simulate LDPC coding and decoding The code sequence is decoded iteratively by passing values between the left and right nodes through the connections. The first thing it would be good to add in order to improve visualization is to add arrows to the connections in the direction of passing values. The alternative is to draw a bigger arrow at the top of the connection showing the direction. Another thing I would like to do is displaying the current mathematical operation below the connection (in this example c * H'). What I don't know how to do is displaying special characters and mathematical symbols and other kinds of text such as subscript and superscript in the figure (for example sum sign and subscript "T" instead of sign ="'" to indicate transposed matrix). I would be very thankful if anyone could point to any useful resources for the questions above or show the solution. Thank you.

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  • Iserializable to serialize readonly methods to be sent through webservice

    - by george9170
    I am sending an object through a webservice with readonly methods. I am using the Iserializable interface, assuming that I would no longer need a parameterless constructor. This is not true and I still cannot send my object over the wire. public class Foo: ISerializable { public boolean IsBusy { get; private set;} protected Foo(SerializationInfo info, StreamingContext context) { this.IsBusy = info.GetBoolean("IsBusy"); } void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context) { .AddValue("IsBusy", this.IsBusy); }

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  • Flex: Would a computational engine for a Connect-4 type game be too slow?

    - by Robusto
    OK, I was just fooling around in my spare time and have made this cool interface and game-playing code for a Connect-4 type game, written in Flex and playable by 2 human players in Flash. It accurately detects wins, etc. I'm smart enough to know that I've done the easy part. Before I dig into an AI for game play, I wanted to ask if this is the kind of thing that can really be handled computationally by a Flash plugin. It seems to me that for every turn up until the end there are 8 possible moves, 8 responses to each move, etc. So wouldn't a perfect engine have to be able to potentially see 8^8 moves (over 16 million), and a fairly good engine see up to a million? I don't know game coding so this is new to me. What's a reasonable move horizon for such a game to be able to see?

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  • Storing expression references to data base

    - by Marcus
    I have standard arithmetic expressions sotred as strings eg. "WIDTH * 2 + HEIGHT * 2" In this example WIDTH and HEIGHT references other objects in my system and the literals WIDTH and HEIGHT refers to a property (Name) on those objects. The problem I'm having is when the Name property on an expression object changes the expression won't match anymore. One solution I came up with is to instead of storing "WIDTH * 2 + HEIGHT * 2" i store "{ID_OF_WIDTH} * 2 + {ID_OF_HEIGHT} * 2" And let my parser be able to parse this new syntax and implement an interface or such on referenced objects IExpressionReference { string IdentifierName { get; } } Anyone have a better/alternative solution to my problem?

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  • Anyone knows of a good addressbook implementation?

    - by Tsahi Levent-Levi
    I am looking to add an address book to one of my programs. For that purpose, I want to have something that is flexible and customizable to the point of allowing me to hook up additional metadata to contacts in it from third parties. I don't mind paying for a solution as long as I get something that is usable for me. My requirements: Optimized to run on embedded devices Preferably in source code form Ability to add my own fields to contacts over those the address book provides out of the box Ability to plugin "stuff" to it to enhance it without changing its base code too much Has a C or C++ interface

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  • Using an IBAction method when it is not called from an action?

    - by cannyboy
    Are there any issues when using IBAction when it is not actually called from a user's action? If you have an action like -(IBAction)sayHello:(id)sender; You can call it from within your class like: [self sayHello:@"x"] The @"x" doesn't do anything, it just fills in for the sender. You can actually create an IBAction method without (id)sender -(IBAction)sayHello; and call it from both user's actions and from within the code, but then you won't get any useful sender info from the interface. What's the 'correct' way of filling in for the sender, when calling from the code? And can you create sender info to send when it's called from within the code? Just trying to figure it out.

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  • Grails: JSONP callback without id and class in JSON file

    - by Klaas
    Hi, I am working on a REST based interface where people get a json file. The client needs to access the file from another Domain. I use jsonp which works so far. My problem is the rendering in Grails. At the moment I use the 'as JSON' to marshalling the object: render "${params.jsoncallback}(${user as JSON})" The Json file getting to the client inclused all attributes, incluing the id and class, which I do not want to have in there. In case it is not jsonp, I do it this way, which works great: render(contentType:'text/json'){ userName user.userName userImage user.userImage : : } So how do I get the id and class attributes out of the json when rendering "user as JSON"? Any idea? best regards, Klaas

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  • Open source VideoPlayer / AudioPlayer / MediaPlayer GUI / UI resource available?

    - by steff
    Hi, I'm looking for a user interface for a MediaPlayer which should be able to play video as well as audio files. Furthermore it needs the following things (nothing fancy): TextView for playing time Progress Bar for progress visulization Play/Pause/Stop buttons NO playlist functionality required, the player will only play a single item (that's why I don't need next/previous buttons). It sounds pretty much like the standard audio-player of Android = 2.0. Sure, I could try to find its source code but that would require to tediously check out the entire source. I'm just asking for a more efficient way. Thanks in advance, steff

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  • wrapp a function whose parameters are out type pointer to structure using swig

    - by pierr
    I have following function : typedef struct tagT{ int a ; int b ; }Point; int lib_a_f_5(Point *out_t) { out_t->a = 20; out_t->b = 30; return 0; } How should I direct the SWIG to generate the correct code for ruby (or lua)? When putting following statement to the interface file : %apply SWIGTYPE Point* {Point *out_t}; I got a warning : liba.i:7: Warning(453): Can't apply (Point *OUTPUT). No typemaps are defined. Did i need to write a typemap? How should I do it?

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  • how to programmatically register an already setup bean to spring context

    - by lisak
    Hey, I'm wondering how one can do that. Afaik there is BeanFactoryPostProcessor interface that let us use BeanDefinitionRegistry.registerBeanDefinition() method before beans within context are initialized. That method accepts only a class / definition. But usually one needs to register a bean that is already set with properties. Otherwise the bean definition registration itself is kinda useless. I don't want to set it up additionally after I get it from context then. When using singleton it's ok, but for prototypes I'd have to set the bean up for each getBean() .

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  • Storing UTF-8 XML using Word's CustomXMLPart or any other supported way

    - by wpfwannabe
    I am writing a Word add-in which is supposed to store some own XML data per document using Word object model and its CustomXMLPart. The problem I am now facing is the lack of IStream-like functionality for reading/writing XML to/from a CustomXMLPart. It only provides BSTR interface and I am puzzled how to handle UTF-8 XMLs with BSTRs. To my understanding an UTF-8 XML file should really never have to undergo this sort of Unicode conversion. I am not sure what to expect as a result here. Is there another way of using Word automation interfaces to store arbitrary custom information inside a DOCX file?

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  • extracting secrets from an embedded chip

    - by Will
    I am looking at an embedded system where secrets are stored in flash that is internal to the chip package, and there is no physical interface to get that information out - all access to this flash is policed by program code. All DMA attacks and JTAG and such are disabled. This seems to be a common locked-down configuration for system-on-a-chip. How might an attacker recover the secrets in that Flash? I understand they can fuzz for vulnerabilities in the app code and exploit it, that there could be some indistinct general side channel attack or something. But how would an attacker really go about trying to recover those keys? Are there viable approaches for a determined attacker to somehow shave-down the chip or some kind of microscope attack?

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  • reference symbols on the main timeline

    - by vasion
    this is one of those upsurdly basic questions for which google does not work. I have usually dispatched events from my classes and dealt with the user interface in the document class. But now i want to separate all the UI in a separate class, accessible by other classes. I have added it as a child to the main/document class, but how do i reference the main class without going through parent.parent shananigans? edit. one more thing i remembered. Some of my UI elements are not programatically added.

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  • How can I use my own connection class with a strongly typed dataset?

    - by Maslow
    I have designed a class with sqlClient.SqlCommand wrappers to implement such functionality as automatic retries on timeout, Async (thread safety), error logging, and some sql server functions like WhoAmI. I've used some strongly typed datasets mainly for display purposes only, but I'd like to have the same database functionality that I use with my class. Is there an interface I can implement or a way to hook my command/connection class into the dataset at design or runtime? Or would I need to somehow write a wrapper for the dataset to implement these types of functions? if this is the only option could it be made generic to wrap anything that inherits from dataset?

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  • Is there a production ready web application framework in Python?

    - by peperg
    I heard lots of good opinions about Python language. They say it's mature, expressive etc... Are there any production-ready web application frameworks in Python. By "production ready" I mean : supports objective-relational mapping with caching and declarative desciption (like JPA, Hibernate etc..) controls oriented user interface support - no HTML templates but something like JSF (RichFaces, Icefaces) or GWT, Vaadin, ZK component decomposition and dependency injection (like EJB or Spring) unit and integration testing good IDE support clustering, modularity etc (like Terracota, OSGi etc..) there are successful applications written in it by companies like IBM, Oracle etc (I mean real business applications not Twitter) could have commercial support Is it possible at all in Python world ? Or only choices are : use Python and write everything from the bottom (too expensice) stick to JEE buy .NET stack

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  • Best Version control for lone developer

    - by Stephen
    I'm a lone developer at the moment; please share you experiences on what is a good VC setup for a lone developer. My constraints are; I work on multiple machines and need to keep them synced up Sometimes I work offline I'm currently using Subversion(just the client to a remote server), and that is working ok. I'm interested in mecurial and git DVCS, but none of their use-cases make sense to my situation. EDIT: I've migrated my active development to Fossil http://www.fossil-scm.org/ after trialing it with a client. I really like the features to autosync my repositories(reducing accidental forks), the documentation support(both wiki and embedded/versioned) that supports my need to document the code and the project in different spaces, the easy to configure issue tracker, nice access control, skinnable web interface and helpful community.

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  • How to efficiently SELECT rows from database table based on selected set of values

    - by Chau Chee Yang
    I have a transaction table of 1 million rows. The table has a field name "Code" to keep customer's ID. There are about 10,000 different customer code. I have an GUI interface allow user to render a report from transaction table. User may select arbitrary number of customers for rendering. I use IN operator first and it works for few customers: SELECT * FROM TRANS_TABLE WHERE CODE IN ('...', '...', '...') I quickly run into problem if I select few thousand customers. There is limitation using IN operator. An alternate way is create a temporary table with only one field of CODE, and inject selected customer codes into the temporary table using INSERT statement. I may then using SELECT A.* FROM TRANS_TABLE A INNER JOIN TEMP B ON (A.CODE=B.CODE) This works nice for huge selection. However, there is performance overhead for temporary table creation, INSERT injection and dropping of temporary table. Do you aware of better solution to handle this situation?

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  • How to define the order with ImportMany attribute?

    - by JD
    Hi to all, I am just getting into MEF and was wondering how you could define the order of collection exported with [ImportMany]? What I mean here is if I had two classes (Class1, Class2) that implement the interface IService and each of the implementations are in two different libraries (although they could be in the same), I want the Class2 instance to be created before the Class1 instance in the IEnumerable collection defined by the ImportMany attribute. So it is like a pipeline of functionality where Class2 calls are made before Class1 calls. Also, I have an another Class (Class3 which also implements IService) in another library, which I want introduced later on (i.e. some logging utility), how do I make this the 3rd instance in the ImportMany collection? JD

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