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• WPF Statusbar Updates - help, I seem to be going round in circles

  - by David Ward

  I seem to be going round in circles. I have a WPF application that has a main ribbon window with a status bar. When you navigate to a "view" a user control is displayed as the content of the main window. The view has a ViewModel which handles retrieving data from the database and the View's datacontext is set to the ViewModel. What I want is to have the lengthy operation (data retrieval) run on a background thread and whilst it is running the status in the main window to report appropriately. When the background task is complete, the status should revert back to "Ready" (much the same as Visual Studio). How should I wire this together so that I can have the data access code separated out in the ViewModel whilst keeping a responsive UI? I have tried using the BackgroundWorker is various places in the code and I still end up with an unresponsive UI.

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• Value object getter

  - by sarah xia

  Hi, I've got a value object, which stores info for example amount. The getAmount() getter returns amount in cents. However in various places, we need to get amount in dollar. There are 2 approaches I can think of: write a convert method and place it in a utility class. add a getAmountInDollar() getter in the value object. I prefer the second approach. What do you think? What are pros and cons of both approaches?

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• Rank Source Control Optionsl-VSS vs CVS vs none vs your own hell

  - by Roman A. Taycher

  It seems like a lit of people here and on many programmer wikis/blogs/ect. elsewhere really dislike VSS. A lot of people also have a serious dislike for cvs. In many places I have heard a lot of differing opinions on whether or not using vss or cvs is better or worse then using no source control, please rate the worst and explain why!!!!! you rated them this way. Feel free to throw in your own horrible system in the rankings. If you feel it depends on the circumstances try to explain the some of the different scenarios which lead to different rankings. (note:I see a lot of discussion of what is better but little of what is worse.) second note: while both answers are nice I'm looking less for good replacements and more for a comparison of which is worse and more importantly why!!!!!

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• What happens to the output to a log4net console appender in a Windows service?

  - by uriDium

  I have a console project that I have been working on. I added log4net to handle all my logging. In some places I have made use of the console appender. When I turn this application into a Windows Service should I just remove the console appender or what happens to that output? Does it just get lost? I would like to keep it if all possible because if I run it straight from the command prompt I would like to see the console output to help debug things.

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• datanucleus enhancer & javaw: "the parameter is incorrect"

  - by Riley

  I'm on windows XP using eclipse and the datanucleus enhancer for a gwt + gae app. When I run the enhancer, I get an error: Error Thu Oct 21 16:33:57 CDT 2010 Cannot run program "C:\Program Files\Java\jdk1.6.0_18\bin\javaw.exe" (in directory "C:\ag\dev"): CreateProcess error=87, The parameter is incorrect java.io.IOException: Cannot run program "C:\Program Files\Java\jdk1.6.0_18\bin\javaw.exe" (in directory "C:\ag\dev"): CreateProcess error=87, The parameter is incorrect at java.lang.ProcessBuilder.start(Unknown Source) at com.google.gdt.eclipse.core.ProcessUtilities.launchProcessAndActivateOnError(ProcessUtilities.java:213) at com.google.appengine.eclipse.core.orm.enhancement.EnhancerJob.runInWorkspace(EnhancerJob.java:154) at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: CreateProcess error=87, The parameter is incorrect at java.lang.ProcessImpl.create(Native Method) at java.lang.ProcessImpl.<init>(Unknown Source) at java.lang.ProcessImpl.start(Unknown Source) ... 5 more I've had this problem before, and it was due to a long classpath. I just spent an hour and a half shortening my classpath by moving libraries around and even moving my eclipse install, but with no luck. Any ideas about where I should start to look for an answer? The error message doesn't include any information about what directory it's in or anything. It's kind of infuriating! Is it possible to make the output of javaw more verbose? Is it possible to get around this class-path size bug?

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• Custom array sort in perl

  - by ABach

  I have a perl array of to-do tasks that looks like this: @todos = ( "1 (A) Complete online final @evm4700 t:2010-06-02", "3 Write thank-you t:2010-06-10", "4 (B) Clean t:2010-05-30", "5 Donate to LSF t:2010-06-02", "6 (A) t:2010-05-30 Pick up dry cleaning", "2 (C) Call Chris Johnson t:2010-06-01" ); That first number is the task's ID. If a task has ([A-Z]) next to, that defines the task's priority. What I want to do is sort the tasks array in a way that places the prioritized items first (and in order): @todos = ( "1 (A) Complete online final @evm4700 t:2010-06-02", "6 (A) t:2010-05-30 Pick up dry cleaning", "4 (B) Clean t:2010-05-30", "2 (C) Call Chris Johnson t:2010-06-01" "3 Write thank-you t:2010-06-10", "5 Donate to LSF t:2010-06-02", ); I cannot use a regular sort() because of those IDs next to the tasks, so I'm assuming that some sort of customized sorting subroutine is needed. However, my knowledge of how to do this efficiently in perl is minimal. Thanks, all.

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• jQuery pre document ready event

  - by Luke Duddridge

  Hi, I have a list of 179 thumbnail images that I am trying to apply a jQuery lightbox tool to an unorder list of hyper-links. The problem I have is, the jQuery isnt firing until the images have finished downloading, each image is around 23K so on their own, not so big, but as a group this equates to around 4MB. There is a delay on IE (main browser used by clients) of a good 5 seconds before the page has completely downloaded every thumbnail and then allows the jQuery to fire. I have tried putting the jQuery document ready event in various places with no success, and only been able to put a bandaid on by setting the css on the ul to hide using display:none before applying .show() after the lightbox has applied. I was hoping there is a way to make the jQuery scripts fire before all the content has downloaded? Cheers

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• Join collection of objects into comma-separated string

  - by Helen Toomik

  In many places in our code we have collections of objects, from which we need to create a comma-separated list. The type of collection varies: it may be a DataTable from which we need a certain column, or a List<Customer>, etc. Now we loop through the collection and use string concatenation, for example: string text = ""; string separator = ""; foreach (DataRow row in table.Rows) { text += separator + row["title"]; separator = ", "; } Is there a better pattern for this? Ideally I would like an approach we could reuse by just sending in a function to get the right field/property/column from each object.

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• Is there a code style enforcer?

  - by Petruza

  I'm working with websites written in PHP, along with many other programmers, and sometimes I have to deal with really awful code. Indentation totally messed up, curly braces in the wrong places, terrible whitespace use, it really hurts my eyes and actually makes my work harder and take longer. Is there a tool where you can specify your coding style and then it applies it to files? I'm sure there must be such functions in different IDEs, but I need an independent tool as I code with simple notepads like Notepad++ or the like. ( if it's such a function in Notepad++, I didn't see it )

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• Blending Three Images into Graphics Context Using Alpha Blend Mode kBlendModeOverlay

  - by steganous

  Does kCGBlendModeOverlay not work exactly like Photoshop's Overlay blending mode? I'm trying to overlay three images into a graphic context via: [uiimageGreen drawAtPoint:CGPointMake(x, y) blendMode:kCGBlendModeOverlay alpha:1.0]; [uiimageRed drawAtPoint:CGPointMake(x, y) blendMode:kCGBlendModeOverlay alpha:1.0]; [uiimageBlue drawAtPoint:CGPointMake(x, y) blendMode:kCGBlendModeOverlay alpha:1.0]; In the end, if I overlay just two of the three, the result is much closer to my desired output color in places where both images intersect. Adding the third image, however, causes the first-drawn image's color to be dominant in the resulting mix of colors. (e.g. in the above code, green comes out dominant, when the result should actually be white) Do you get the same result if you try?

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• Figuring out if overflow:auto would have been triggered on a div

  - by jerrygarciuh

  Hi folks, // Major edit, sorry in bed with back pain, screwed up post One of the ad agencies I code for had me set up an alternate scrolling solution because you know how designers hate things that just work but aren't beautiful. The scrolling solution is applied to divs with overflow:hidden and uses jQuery's scrollTo(). So, this is married in places to their CMS. What I have not been able to sort yet is how to hide the scrolling UI when overflow:auto would not have been triggered by the CMS content. The divs have set heights and widths. Can i detect hidden content? Or measure the div contents' height? Any ideas? TIA JG

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• Not able to capture Enter key in WinForms text box

  - by Michael Hermes

  When the user is entering a number into a text box, I would like them to be able to press Enter and simulate pressing an Update button elsewhere on the form. I have looked this up several places online, and this seems to be the code I want, but it's not working. When data has been put in the text box and Enter is pressed, all I get is a ding. What am I doing wrong? (Visual Studio 2008) private void tbxMod_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Enter) { btnMod.PerformClick(); } }

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• Using Grapher on GIN application with GinModuleAdapter

  - by Epaga

  I've been trying to use Grapher on my GIN project. But trying to create an Injector to give the InjectorGrapher has not been working. Right in the first line of my code: Injector injector = Guice.createInjector( new GinModuleAdapter( new MyGinModule() ) ); it crashes with Exception in thread "main" java.lang.AssertionError: should never be actually called at com.google.gwt.inject.rebind.adapter.GwtDotCreateProvider.get(GwtDotCreateProvider.java:43) at com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:48) at com.google.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:45) at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:811) at com.google.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:42) at com.google.inject.Scopes$1$1.get(Scopes.java:54) at com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:48) at com.google.inject.SingleParameterInjector.inject(SingleParameterInjector.java:42) at com.google.inject.SingleParameterInjector.getAll(SingleParameterInjector.java:66) at com.google.inject.ConstructorInjector.construct(ConstructorInjector.java:84) at com.google.inject.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:111) at com.google.inject.BoundProviderFactory.get(BoundProviderFactory.java:56) at com.google.inject.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:45) at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:811) at com.google.inject.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:42) at com.google.inject.Scopes$1$1.get(Scopes.java:54) at com.google.inject.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:48) at com.google.inject.InjectorBuilder$1.call(InjectorBuilder.java:200) at com.google.inject.InjectorBuilder$1.call(InjectorBuilder.java:194) at com.google.inject.InjectorImpl.callInContext(InjectorImpl.java:804) at com.google.inject.InjectorBuilder.loadEagerSingletons(InjectorBuilder.java:194) at com.google.inject.InjectorBuilder.injectDynamically(InjectorBuilder.java:176) at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:113) at com.google.inject.Guice.createInjector(Guice.java:92) at com.google.inject.Guice.createInjector(Guice.java:69) at com.google.inject.Guice.createInjector(Guice.java:59) at com.me.myself.Grapher.main(Grapher.java:20) What gives?

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• How to add class to openframeworks project in VS2012

  - by Mr Bell

  I am normally a C# guy but trying to get into c++. I made myself a new openframeworks project by copying and pasting one of the example projects and then renaming everything to my project name. (If there is an easier way, I would love to hear it) This project has the .cpp and .h files in a sub folder called "src" which are in turn organized into virtual folders (filters???) in visual studio. How can I add a class to this project from within visual studio? If I right click on the src filter in the solution explorer and hit add class. It creates the class files at the root of the project not in the src folder. I mean it does this both in the solution explorer and where it physically places the files. This is a problem because I can't include my class files in the rest of my app, presumably because they aren't in the same folder What is the proper way to add a class file?

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• Custom draw button using uxtheme.dll

  - by Javier De Pedro

  I have implemented my custom button inheriting from CButton and drawing it by using uxtheme.dll (DrawThemeBackground with BP_PUSHBUTTON). Everything works fine but I have two statuses (Normal and Pressed) which Hot status is the same. It means when the user places the cursor over the button it is drawn alike regardless the button status (Pressed or not). This is a bit confusing to the user and I would like to change the way the button is drawn in Pressed & Hot status. Does anybody know a way? I have also thought about custumizing the whole drawing but the buttons use gradients, borders, shadows, etc. So it is not easy to achive the same look&feel drawing everything by myself. Is there a way to find the source code of the dll or know how to do it? Thanks in advance. Javier

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• Embedded AXIS2: Serving a custom WSDL

  - by Maik

  I am using a console app that starts several axis instances without using a packages archive. Like this: AxisService axisService2 = AxisService.createService( new Myclass.getClass().getName(), axisConfigurationContext.getAxisConfiguration()); axisService2.addParameter(new Parameter("useOriginalwsdl", "true")); axisConfigurationContext.getAxisConfiguration().addService(axisService2); Now, I need to serve a custom WSDL. I tried adding a META-INF folder to the bin-root, and in various other places, but with no success. How do I specify in this case the location of a custom WSDL? Thanks!

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• C++ long long manipulation

  - by Krakkos

  Given 2 32bit ints iMSB and iLSB int iMSB = 12345678; // Most Significant Bits of file size in Bytes int iLSB = 87654321; // Least Significant Bits of file size in Bytes the long long form would be... // Always positive so use 31 bts long long full_size = ((long long)iMSB << 31); full_size += (long long)(iLSB); Now.. I don't need that much precision (that exact number of bytes), so, how can I convert the file size to MiBytes to 3 decimal places and convert to a string... tried this... long double file_size_megs = file_size_bytes / (1024 * 1024); char strNumber[20]; sprintf(strNumber, "%ld", file_size_megs); ... but dosen't seem to work. i.e. 1234567899878Bytes = 1177375.698MiB ??

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• Measuring Web Page Performance on Client vs. Server

  - by Yaakov Ellis

  I am working with a web page (ASP.net 3.5) that is very complicated and in certain circumstances has major performance issues. It uses Ajax (through the Telerik AjaxManager) for most of its functionality. I would like to be able to measure in some way the amounts of time for the following, for each request: On client submitting request to server Client-to-Server On server initializing request On server processing request Server-to-Client Client rendering, JavaScript processing I have monitored the database traffic and cannot find any obvious culprit. On the other hand, I have a suspicion that some of the Ajax interactions are causing performance issues. However, until I have a way to track the times involved, make a baseline measurement, and measure performance as I tweak, it will be hard to work on the issue. So what is the best way to measure all of these? Is there one tool that can do it? Combination of FireBug and logging inserted into different places in the page life-cycle?

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• What user runs the git hook?

  - by Jasie

  I have a post-update hook on my server, such that when I git push it does a pull on the live web directory. However, while the push always succeeds, the post-update hook sometimes fails. The hook is pretty simple: #!/bin/sh # # An example hook script to prepare a packed repository for use over # dumb transports. # # To enable this hook, rename this file to "post-update". cd /var/www env -i git pull I'm pushing updates from a variety of places, but sometimes I have to login as root on the server and manuall do a env -i git pull I only have to do it 20% of the time though. Any ideas why it would fail randomly? Thanks!

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• How do I set the next available custom color in the ColorDialog?

  - by Hannah

  I'm currently coding in VB.net. A user places the cursor in a table cell and clicks on "Table Background Color" to edit the current background colour. Currently I have been able to detect the current colour (for instance a light blue) and set that colour in the ColorDialog (Colour swatches are correct and RGB values are correct). What I would like to do is enable the user to click on the "Add to Custom Colors" to save the colour. Problem is, it sets the first square in the custom colours area (which happens to already be filled in with another custom colour), rather than finding the next square that is white and set it there instead. Is this possible? If the user selects a new custom colour square when they first load the ColorDialog, the current colour (light blue) disappears and the colour swatches and RGB values are set as white. Thanks

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• Access data returned from server

  - by Vinodh Ramasubramanian

  I am looking to access the actual value returned from the server.getRowData returns the value after unformat applied to the value. This results in loss of information. For instance, if a double value is rounded to two decimal places and if I want to populate the form for edit with the original value returned from the server with 6 decimals, how can I get the value returned. for eg: Value returned from server : 12.345678 formatter option for column : formatter: 'number', formatoptions: {thousandsSeparator: ",", decimalPlaces: 2} Value displayed in grid : 12.35 How do I retrieve the value 12.345678 returned from the server. getRowData returns 12.35

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• Compile time string hashing

  - by Caspin

  I have read in few different places that using c++0x's new string literals it might be possible to compute a string's hash at compile time. However, no one seems to be ready to come out and say that it will be possible or how it would be done. Is this possible? What would the operator look like? I'm particularly interested use cases like this. void foo( const std::string& value ) { switch( std::hash(value) ) { case "one"_hash: one(); break; case "two"_hash: two(); break; /*many more cases*/ default: other(); break; } } Note: the compile time hash function doesn't have to look exactly as I've written it. I did my best to guess what the final solution would look like, but meta_hash<"string"_meta>::value could also be a viable solution.

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• Automating Portlet Deployment to WebSphere Portal Server 6.1

  - by GaZ

  I've recently started on a project to develop some portlets which will run on IBM WebSphere Portal Server 6.1. Does anyone know of any scripts, Ant tasks, Maven plugins, etc. for publishing a portlet to Portal Server? In the WebSphere Portlet Factory plugin for eclipse it is possible to "publish" a portlet project to Portal Server instance, however I'd like to know what's going on underneath the hood here (or at least how to replicate the behaviour) so that I can do it in other places (i.e. from continuous integration server). UPDATE: From what I've read it sounds like the Portlet Factory publishes using a WebSphere JMX client. Does anyone know where I can find more details on this?

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• Can I install WhizzyTeX for Emacs on a Mac (is Mac OS X a unix environment)?

  - by Vivi

  I think my question is pretty stupid, but here it goes: I am using Aquamacs, and I want to install the WhizzyTeX mode. The website for WhizzyTeX says that "it is designed for Unix platforms". I read that Mac OS X is unix certified, but does that mean I can install WhizzyTeX on my mac? If yes, can I install and use it with Aquamacs or do I have to use the Emacs running from the terminal? PS: I don't know whether this question should be posted here or on SuperUser, but as Emacs users seem to hang out here more often, this is the place I chose. EDIT: There are some websites saying I can use WhizzyTeX with Carbon Emacs on mac os x, but some places say I cannot (see for example this pdf document, page 27, which says that "* whizzytex: http://cristal.inria.fr/whizzytex/ mode in latex with ocaml good fo linux, should also work in cygwin, doe not work on osx"). So I am really confused...

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• Auto detect internal/external development environment

  - by zaf

  We use the following function to auto detect if we are on a machine internally or on a live server and then choose the appropriate configs for various components. function devIsLocal(){ $res=false; $http_host=$_SERVER['HTTP_HOST']; if($http_host=='localhost')$res=true; if($http_host=='127.0.0.1')$res=true; if(substr($http_host,-4)=='.lan')$res=true; if(strpos($http_host, '.')===false)$res=true; return($res); } As you can see it only relies on the HTTP_HOST value. Of course, if you have use virtual host locally like example.com then the function will be tricked. Are there any other ways to fool the function? and what other variables/places could we peek at to determine where we are?

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