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  • Mac OS X linker error in Qt; CoreGraphics & CGWindowListCreate

    - by Jake Petroules
    Here is my .mm file #include "windowmanagerutils.h" #ifdef Q_OS_MAC #import </System/Library/Frameworks/ApplicationServices.framework/Frameworks/CoreGraphics.framework/Headers/CGWindow.h> QRect WindowManagerUtils::getWindowRect(WId windowId) { CFArrayRef windows = CGWindowListCreate(kCGWindowListOptionOnScreenOnly, kCGNullWindowID); return QRect(); } QRect WindowManagerUtils::getClientRect(WId windowId) { return QRect(); } QString WindowManagerUtils::getWindowText(WId windowId) { return QString(); } WId WindowManagerUtils::rootWindow() { QApplication::desktop()->winId(); } WId WindowManagerUtils::windowFromPoint(const QPoint &p, WId parent, bool(*filterFunction)(WId)) { return NULL; } void WindowManagerUtils::setTopMostCarbon(const QWidget *const window, bool topMost) { if (!window) { return; } // Find a Cocoa equivalent for this Carbon function // [DllImport("/System/Library/Frameworks/Carbon.framework/Versions/Current/Carbon")] // OSStatus ret = HIViewSetZOrder(this->winId(), kHIViewZOrderAbove, NULL); } #endif The linker is telling me "_CGWindowListCreate" is undefined. What libraries must I link to? Apple's documentation is not very helpful on telling what to include or link to, like MSDN is. Also I couldn't just do #import <CGWindow.h>, I had to specify the absolute path to it... any way around that?

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  • Using JavaCC to infer semantics from a Composite tree

    - by Skice
    Hi all, I am programming (in Java) a very limited symbolic calculus library that manages polynomials, exponentials and expolinomials (sums of elements like "x^n * e^(c x)"). I want the library to be extensible in the sense of new analytic forms (trigonometric, etc.) or new kinds of operations (logarithm, domain transformations, etc.), so a Composite pattern that represent the syntactic structure of an expression, together with a bunch of Visitors for the operations, does the job quite well. My problem arise when I try to implement operations that depends on the semantics more than on the syntax of the Expression (like integrals, for instance: there are a lot of resolution methods for specific classes of functions, but these same classes can be represented with more than a single syntax). So I thought I need something to "parse" the Composite tree to infer its semantics in order to invoke the right integration method (if any). Someone pointed me to JavaCC, but all the examples I've seen deal only with string parsing; so, I don't know if I'm digging in the right direction. Some suggestions? (I hope to have been clear enough!)

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  • How to assert on number of html table rows in ruby using capybara + cucumber

    - by Neil
    I am trying to get to grips with BDD web development in Ruby using cucumber + capybara and I am stuck at what should be an easy task - just to check the number of rows in a table. Something along the lines of: page.should have_xpath("//table[@id='myTable']") find("//table[@id='myTable']/tr").length.should = 3 But this doesn't work and I can't find a way to assert against the table length. Any ideas anyone (please be easy on me tho' I'm a ruby nooby) Thanks in advance Neil

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  • templates of functions

    - by anotr67
    I'm told to create template of function , that will take 4 arguments : pointer reference pointer to array pointer to function How to perform this task ? I was trying : template<typename TYPE> TYPE biggest(TYPE *L, TYPE $M, TYPE *K[], TYPE *O()) { } but it is wrong.

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  • Merging MP3 files in Linux Debian using PHP

    - by pako
    What's the easiest way to merge the contents of several MP3 files into one using PHP 5.2 on Linux Debian system? I found some scripts that are supposed to do in PHP only, but they seem to be buggy. Perhaps there is a way to accomplish this task using command line programs, that I could install on my Linux Debian machine?

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  • Rijndael managed: plaintext length detction

    - by sheepsimulator
    I am spending some time learning how to use the RijndaelManaged library in .NET, and developed the following function to test encrypting text with slight modifications from the MSDN library: Function encryptBytesToBytes_AES(ByVal plainText As Byte(), ByVal Key() As Byte, ByVal IV() As Byte) As Byte() ' Check arguments. If plainText Is Nothing OrElse plainText.Length <= 0 Then Throw New ArgumentNullException("plainText") End If If Key Is Nothing OrElse Key.Length <= 0 Then Throw New ArgumentNullException("Key") End If If IV Is Nothing OrElse IV.Length <= 0 Then Throw New ArgumentNullException("IV") End If ' Declare the RijndaelManaged object ' used to encrypt the data. Dim aesAlg As RijndaelManaged = Nothing ' Declare the stream used to encrypt to an in memory ' array of bytes. Dim msEncrypt As MemoryStream = Nothing Try ' Create a RijndaelManaged object ' with the specified key and IV. aesAlg = New RijndaelManaged() aesAlg.BlockSize = 128 aesAlg.KeySize = 128 aesAlg.Mode = CipherMode.ECB aesAlg.Padding = PaddingMode.None aesAlg.Key = Key aesAlg.IV = IV ' Create a decrytor to perform the stream transform. Dim encryptor As ICryptoTransform = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV) ' Create the streams used for encryption. msEncrypt = New MemoryStream() Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write) Using swEncrypt As New StreamWriter(csEncrypt) 'Write all data to the stream. swEncrypt.Write(plainText) End Using End Using Finally ' Clear the RijndaelManaged object. If Not (aesAlg Is Nothing) Then aesAlg.Clear() End If End Try ' Return the encrypted bytes from the memory stream. Return msEncrypt.ToArray() End Function Here's the actual code I am calling encryptBytesToBytes_AES() with: Private Sub btnEncrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEncrypt.Click Dim bZeroKey As Byte() = {&H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0} PrintBytesToRTF(encryptBytesToBytes_AES(bZeroKey, bZeroKey, bZeroKey)) End Sub However, I get an exception thrown on swEncrypt.Write(plainText) stating that the 'Length of the data to encrypt is invalid.' However, I know that the size of my key, iv, and plaintext are 16 bytes == 128 bits == aesAlg.BlockSize. Why is it throwing this exception? Is it because the StreamWriter is trying to make a String (ostensibly with some encoding) and it doesn't like &H0 as a value?

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  • Which web crawler to use to save news articles from a website into .txt files?

    - by brokencoding
    Hi, i am currently in dire need of news articles to test a LSI implementation (it's in a foreign language, so there isnt the usual packs of files ready to use). So i need a crawler that given a starting url, let's say http://news.bbc.co.uk/ follows all the contained links and saves their content into .txt files, if we could specify the format to be UTF8 i would be in heaven. I have 0 expertise in this area, so i beg you for some sugestions in which crawler to use for this task.

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  • JSON limitation?

    - by thedp
    Hello, I would like to know if JSON with AJAX has a limitation to the amount of data an outgoing and returning parameter can carry? I would like to be able to send and return from the server a file with 10,000 lines, as a string. How should I achieve this task? Will a single parameter will be able to hand this? Thank you.

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  • Mocking an object that uses jni using EasyMock

    - by Visage
    So my class under test has code that looks braodly like this public void doSomething(int param) { Report report = new Report() ...do some calculations report.someMethod(someData) } my intention was to extract the construction of report into a protected method and override it to use a mock object that I could then test to ensure that someMethod had been called with the right data. So far so good. But Report isnt under my control, and to mkae things worse it uses JNI to load a library at runtime. If I do Report report = EasyMock.createMock(Report.class) then EasyMock attempts to use reflection to find out the class members, but this causes an attempt to load the JNI library, which fails (the JNI libraries are only available on UNIX). Im considering two things: a) Introduce a ReportWrapper interface with two implementations, one of which will delegate calls to an real Report (so basically a Proxy), and a second which will basically use a mock object. or b) instead of calling someMethod, call a protected method which will in turn call someMethod that I can override in a testing subclass. Either way it seems nasty. Any better ways?

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  • Exposing a .Net Service

    - by Dave
    I have written a Windows Service in .Net and I want to expose the classes to be called by other .Net code. Specifically, I have an API that I want to expose via a DLL that will be placed in the GAC, and I want the DLL in the GAC to use the classes of the .Net Windows Service. I need this architecture as the code in the Windows Service needs to be run as a different user/account as the caller of the API (the account would be created at install time). My plan was to expose the Windows Service classes via COM (regasm.exe to register and tlbexp.exe to create the type library), and then call the classes in the GAC DLL via COM (imported via tlbimp.exe). However I get the following error from tlbimp: TlbImp : error TI0000 : System.Runtime.InteropServices.COMException - Type library '' was exported from a CLR assembly and cannot be re- imported as a CLR assembly. This implies to me that my method is not going to easily work. I can only think that I might need a C++ DLL as a bridge for my GAC DLL to invoke the COM calls, but this seems like a nasty solution. I am basically looking for suggestions. Does anyone know how to expose classes of a Windows Service written in .Net to other .Net code?

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  • Further explanation of IntentService

    - by rayman
    Hi all, I was trying to get the purpose of the IntentService, and when should I use it? I tried to understand from the API, but not enough details on that one. Is there any analogy between this and running long-task on a working thread? Any further explanation and samples on why I would use IntentService would be very welcome. Thanks, ray.

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  • subtotals in columns usind reshape2 in R

    - by user1043144
    I have spent some time now learning RESHAPE2 and plyr but I still do not get it. This time I have a problem with (a) subtotals and (b) passing different aggregate functions . Here an example using data from the excellent tutorial on the blog of mrdwab http://news.mrdwab.com/ # libraries library(plyr) library(reshape2) # get data and add few more variables book.sales = read.csv("http://news.mrdwab.com/data-booksales") book.sales$Stock = book.sales$Quantity + 10 book.sales$SubjCat[(book.sales$Subject == 'Economics') | (book.sales$Subject == 'Management') ] <- '1_EconSciences' book.sales$SubjCat[book.sales$Subject %in% c('Anthropology', 'Politics', 'Sociology') ] <- '2_SocSciences' book.sales$SubjCat[book.sales$Subject %in% c('Communication', 'Fiction', 'History', 'Research', 'Statistics') ] <- '3_other' # to get to my starting dataframe (close to the project I am working on) book.sales1 <- ddply(book.sales, c('Region', 'Representative', 'SubjCat', 'Subject', 'Publisher'), summarize, Stock = sum(Stock), Sold = sum(Quantity), Ratio = round((100 * sum(Quantity)/ sum(Stock)), digits = 1)) #melt it m.book.sales = melt(data = book.sales1, id.vars = c('Region', 'Representative', 'SubjCat', 'Subject', 'Publisher'), measured.vars = c('Stock', 'Sold', 'Ratio')) # cast it Tab1 <- dcast(data = m.book.sales, formula = Region + Representative ~ Publisher + variable, fun.aggregate = sum, margins = c('Region', 'Representative')) Now my questions : I have been able to add the subtotals in rows. But is it possible also to add margins in the columns. Say for example, Totals of Stock for one Publisher ? Sorry I meant to say example total sold for all publishers There is a problem with the columns with “ratio”. How can I get “mean” instead of “sum” for this variable ? P.S: I have seen some examples using reshape. Will you recommend to use it instead of reshape2 (which seems not to include the functionalities of two functions).

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  • Can't read from RSOP_RegistryPolicySetting WMI class in root\RSOP namespace

    - by JCCyC
    The class is documented in http://msdn.microsoft.com/en-us/library/aa375050%28VS.85%29.aspx And from this page it seems it's not an abstract class: http://msdn.microsoft.com/en-us/library/aa375084%28VS.85%29.aspx But whenever I run the code below I get an "Invalid Class" exception in ManagementObjectSearcher.Get(). So, does this class exist or not? ManagementScope scope; ConnectionOptions options = new ConnectionOptions(); options.Username = tbUsername.Text; options.Password = tbPassword.Password; options.Authority = String.Format("ntlmdomain:{0}", tbDomain.Text); scope = new ManagementScope(String.Format("\\\\{0}\\root\\RSOP", tbHost.Text), options); scope.Connect(); ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, new ObjectQuery("SELECT * FROM RSOP_RegistryPolicySetting")); foreach (ManagementObject queryObj in searcher.Get()) { wmiResults.Text += String.Format("id={0}\n", queryObj["id"]); wmiResults.Text += String.Format("precedence={0}\n", queryObj["precedence"]); wmiResults.Text += String.Format("registryKey={0}\n", queryObj["registryKey"]); wmiResults.Text += String.Format("valueType={0}\n", queryObj["valueType"]); } In the first link above, it lists as a requirement something called a "MOF": "Rsopcls.mof". Is this something I should have but have not? How do I obtain it? Is it necessary in the querying machine or the queried machine? Or both? I do have two copies of this file: C:\Windows>dir rsop*.mof /s Volume in drive C has no label. Volume Serial Number is 245C-A6EF Directory of C:\Windows\System32\wbem 02/11/2006 05:22 100.388 rsop.mof 1 File(s) 100.388 bytes Directory of C:\Windows\winsxs\x86_microsoft-windows-grouppolicy-base-mof_31bf3856ad364e35_6.0.6001.18000_none_f2c4356a12313758 19/01/2008 07:03 100.388 rsop.mof 1 File(s) 100.388 bytes Total Files Listed: 2 File(s) 200.776 bytes 0 Dir(s) 6.625.456.128 bytes free

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  • Why aren't unsigned OpenMP index variables allowed?

    - by Moe
    I have a loop in my C++/OpenMP code that looks like this: #pragma omp parallel for for(unsigned int i=0; i<count; i++) { // do stuff } When I compile it (with Visual Studio 2005) I get the following error: error C3016: 'i' : index variable in OpenMP 'for' statement must have signed integral type I understand that the error occurs because i is unsigned instead of signed, and changing i to be signed removed this error. What I want to know is why is this an error? Why aren't unsigned index variables allowed? Looking at the MSDN page for this error gives me no clues.

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  • Finder plugin in 10.6

    - by Girish Kolari
    I want to color badge files and folders based on the some condition in finder, what is the approach to achieve this in Mac OS X 10.6 I have checked this question: This only talk about the context menu in finder http://stackoverflow.com/questions/1651075/finder-plugin-in-snow-leopard I have even checked: http://scplugin.tigris.org/ even they don't do color badging in 10.6 which is pending task. Thanks in advance for your all help

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  • JavaScript multithreading

    - by Krzysztof Hasinski
    I'm working on comparison for several different methods of implementing (real or fake) multithreading in JavaScript. As far as I know only webworkers and Google Gears WorkerPool can give you real threads (ie. spread across multiple processors with real parallel execution). I've found the following methods: switch between tasks using yield() use setInterval() (or other non-blocking function) with threads waiting one for another use Google Gears WorkerPool threads (with plugin) use html5 web workers I read related questions and found several variations of the above methods, but most of those questions are old, so there might be a few new ideas. I'm wondering - how else can you achieve multithreading in JavaScript? Any other important methods? UPDATE: As pointed out in comments what I really meant was concurrency. UPDATE 2: I found information that Silverlight + JScript supports multithreading, but I'm unable to verify this. UPDATE 3: Google deprecated Gears: http://code.google.com/apis/gears/api_workerpool.html

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  • Most effective way to draw 4 lines on a screen?

    - by Ross
    basic question, but I'm unsure: I want to draw 4 short lines 1px lines on a view. What is the best way to approach this task? Options:- Load an image of the line, can create 4 UIImageViews with it. Create my own subclass of a UIView that draws a line in the draw rect method. Draw elsewhere on another view, another UIImageView that has an UIImage inside it (is this possible?) Another way? Thanks Ross

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  • Default template parameters with forward declaration

    - by Seth Johnson
    Is it possible to forward declare a class that uses default arguments without specifying or knowing those arguments? For example, I would like to declare a boost::ptr_list< TYPE > in a Traits class without dragging the entire Boost library into every file that includes the traits. I would like to declare namespace boost { template<class T> class ptr_list< T >; }, but that doesn't work because it doesn't exactly match the true class declaration: template < class T, class CloneAllocator = heap_clone_allocator, class Allocator = std::allocator<void*> > class ptr_list { ... }; Are my options only to live with it or to specify boost::ptr_list< TYPE, boost::heap_clone_allocator, std::allocator<void*> in my traits class? (If I use the latter, I'll also have to forward declare boost::heap_clone_allocator and include <memory>, I suppose.) I've looked through Stroustrup's book, SO, and the rest of the internet and haven't found a solution. Usually people are concerned about not including STL, and the solution is "just include the STL headers." However, Boost is a much more massive and compiler-intensive library, so I'd prefer to leave it out unless I absolutely have to.

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  • software and techniques for measuring programmer's productivity

    - by maya
    Hi everybody , measuring the software is essential part of software development. my task is to measure productivity of pair and solo programming . Is there any program help me to measure productivity of the software. and also I'm looking for techniques or steps for measuring productivity. anyone has information please help me . many thanks in advance

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  • Are there any libraries to allow Python or Ruby to get info from SVN?

    - by Mike Trpcic
    I'm looking for plugins that will allow my codebase to interact with, browse, and poll an SVN server for information about a repository. Trac can do this, but I was hoping there was an easy-to-use library available to accomplish the task, rather than trolling through the Trac codebase. Googling for this returns mostly vague results about storing your code in and SVN repository, which is far from what I'm looking for.

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  • Where and how to start on C# and .Net Framework ?

    - by Rachel
    Currently, I have been working as an PHP developer for approximately 1 year now and I want learn about C# and .Net Framework, I do not have any experience with .Net Framework and C# and also there is not firm basis as to why I am going for C# and .Net Framework vs Java or any other programming languages, this decision is mere on career point of view and job opportunities. So my question is about: Is my decision wise to go for C# and .Net Framework route after working for sometime as an PHP Developer ? What are the good resources which I can refer and learn from to get knowledge on C# and .NET Framework ? How should I go about learning on C# and .NET Framework ? What all technologies should I be learning OR have experience with to be considered as an C#/.Net Developer, I am mentioning some technologies, please add or suggest one, if am missing out any ? Technologies C#-THE LANGUAGE GUI APPLICATION DEVELOPMENT WINDOWS CONTROL LIBRARY DELEGATES DATA ACCESS WITH ADO.NET MULTI THREADING ASSEMBLIES WINDOWS SERVICES VB INTRODUCTION TO VISUAL STUDIO .NET WINDOWS CONTROL LIBRARY DATA ACCESS WITH ADO.NET ASP.NET WEB TECHNOLOGIES CONTROLS VALIDATION CONTROL STATE MANAGEMENT CACHING ASP.NET CONFIGURATION ADO.NET ASP.NET TRACING & SECURITY IN ASP.NET XMLPROGRAMMING WEB SERVICES CRYSTAL REPORTS SSRS (SQL Server Reporting Services) MS-Reports LINQ: NET Language-Integrated Query NET Language-Integrated Query LINQ to SQL: SQL Integration WCF: Windows Communication Foundation What Is Windows Communication Foundation? Fundamental Windows Communication Foundation Concepts Windows Communication Foundation Architecture WPF: Windows Presentation Foundation Getting Started (WPF) Application Development WPF Fundamentals What are your thoughts, suggestions on this and from Job and Market Perspective, what areas of C#/.Net Development should I put my focus on ? I know this is very subjective and long question but advice would be highly appeciated. Thanks.

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  • Working around "one executable per project" in Visual C# for many small test programs

    - by Kevin Ivarsen
    When working with Visual Studio in general (or Visual C# Express in my particular case), it looks like each project can be configured to produce only one output - e.g. a single executable or a library. I'm working on a project that consists of a shared library and a few application, and I already have one project in my solution for each of those. However, during development I find it useful to write small example programs that can run one small subsystem in isolation (at a level that doesn't belong in the unit tests). Is there a good way to handle this in Visual Studio? I'd like to avoid adding several dozen separate projects to my solution for each small test program I write, especially when these programs will typically be less than 100 lines of code. I'm hoping to find something that lets me continue to work in Visual Studio and use its build system (rather than moving to something like NAnt). I could foresee the answer being something like: A way of setting this up in Visual Studio that I haven't found yet A GUI like NUnit's graphical runner that searches an assembly for classes with defined Main() functions that you can select and run A command line tool that lets you specify an assembly and a class with a Main function to run

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