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  • Recommendation for high performance WPF Chart

    - by Ajaxx
    We're working on a WPF-based desktop application that charts financial markets information (candlestick charts, overlayed indicator curves, volume, etc). The charts are displayed in real-time with responses to market ticks being shown in real-time (updating one to two times per second is probably a reasonable display refresh policy). We've been looking for a software package (commercial is fine by us) that has the capability of displaying these charts. Additionally, we'd like to have an approach that can render the initial amount of data in a reasonable timeframe (give or take 100-200ms from the time we hand the data over to a complete render on screen). Also we view multiple charts (5-10) simultaneously so a solution that chews up 50% of my CPU to display one chart really isn't going to work well. Has anyone had any good experiences with charting controls. We've had to hand roll the last few charts we've done and I'd prefer not to do it again. Solutions that can make use of the GPU to minimize CPU utilization would be nice as well.

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  • PrintPreview Window in C#

    - by M.Thillai
    Hello Techies, In my windows application in .net, i need to have Print Preview option for an excel file. The followings are my codings. //Excel.Application excelApp = new Excel.Application(); Excel.Workbook wb = excelApp.Workbooks.Open(@"C:\\Documents and Settings \\Admin \\Desktop \\DoCoMo\\ news5.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1]; ws.PrintPreview(Type.Missing); The compilation is successful. but i didn't get the print preview window. Is there any requirement of additional parameters or any other. I don't know how to achieve it . Please Guide me.I will be so great full to Our "Techies" for this Timely help. From, M.Thillai

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  • From actionscript to google's datastore through java.

    - by Jonathan
    I'm working on a flash game written in pure actionscript 3.0 in Flex. I've just finished implementing replays for the game, but want to store the top 10 hiscores' replay data on my google-app-engine'd website. I'm using Java for the app-engine stuff in Eclipse in java but I have no idea how to deal with communicating to my java code from my actionscript code. I'll need to both read and write from actionscript - java - datastore. Does anyone have any experience with this? For note, I'm horribly noob with anything to do with web development. I hear you can pass arguments to a URL when calling it, comparable to command-line arguments on a desktop executable and if so then sending all the data as a large string would be doable... The question then would be how to call a url from AS3 code with additional data and then how to catch that on the java side. Thanks to anyone who can help. Jono

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  • How much overhead does a msg_send call incur?

    - by pxl
    I'm attempting to piece together and run a list of tasks put together by a user. These task lists can be hundreds or thousand of items long. From what I know, the easiest and most obvious way would be to build an array and then iterate through them: NSArray *arrayOfTasks = .... init and fill with thousands of tasks for (id *eachTask in arrayOfTasks) { if ( eachTask && [eachTask respondsToSelector:@selector(execute)] ) [eachTask execute]; } For a desktop, this may be no problem, but for an iphone or ipad, this may be a problem. Is this a good way to go about it, or is there a faster way to accomplish the same thing? The reason why I'm asking about how much overhead a msg_send occurs is that I could also do a straight C implementation as well. For example, I could put together a linked list and use a block to handle the next task. Will I gain anything from that or is it really more trouble than its worth?

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  • Basics of automated tests?

    - by Muhammad Yasir
    Hi, Till now I've been testing my web (usually written in PHP) as well as desktop applications (normally Java or C#) manually. Now I read somewhere on the net about automated tests. I tried searching to know about it in details but almost all searches end up at things like PHPUnit. Could someone please put some light on the theory behind automated tests? How a software can be tested automatically? Any limitations etc? Or may be you can tell me a place where I can read about this. Regards

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  • Python Image Library: How to combine 4 images into a 2 x 2 grid?

    - by Casey
    I have 4 directories with images for an animation. I would like to take the set of images and generate a single image with the 4 images arranged into a 2x2 grid for each frame of the animation. My code so far is: import Image fluid64 = "Fluid64_half_size/00" fluid128 = "Fluid128_half_size/00" fluid512 = "Fluid512_half_size/00" fluid1024 = "Fluid1024_half_size/00" out_image = "Fluid_all/00" for pic in range(1, 26): blank_image = Image.open("blank.jpg") if pic < 10: image_num = "0"+str(pic) else: image_num = str(pic) image64 = Image.open(fluid64+image_num+".jpg") image128 = Image.open(fluid128+image_num+".jpg") image512 = Image.open(fluid512+image_num+".jpg") image1024 = Image.open(fluid1024+image_num+".jpg") out = out_image + image_num + ".jpg" blank_image.paste(image64, (0,0)).paste(fluid128, (400,0)).paste(fluid512, (0,300)).paste(fluid1024, (400,300)).save(out) Not sure why it's not working. I'm getting the error: Traceback (most recent call last): File "C:\Users\Casey\Desktop\Image_composite.py", line 24, in <module> blank_image.paste(image64, (0,0)).paste(fluid128, (400,0)).paste(fluid512, ( ste(fluid1024, (400,300)).save(out) AttributeError: 'NoneType' object has no attribute 'paste' shell returned 1 Any help would be awesome. Thanks!

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  • Error: Can't find common super class of ...

    - by PatlaDJ
    I am trying to process with Proguard a MS Windows desktop application (Java 6 SE using the SWT lib provided by Eclipse). And I get the following critical error: Unexpected error while performing partial evaluation: Class = [org/eclipse/swt/widgets/DateTime] Method = [<init>(Lorg/eclipse/swt/widgets/Composite;I)V] Exception = [java.lang.IllegalArgumentException] (Can't find common super class of [java/lang/StringBuffer] and [org/eclipse/swt/internal/win32/TCHAR]) Error: Can't find common super class of [java/lang/StringBuffer] and [org/eclipse/swt/internal/win32/TCHAR] ---------------------------- When I tried to Google the error, it came out only on two spots on the entire web, that astonished me greatly. I am newbie using Proguard and Java code optimization tools at all. Any thoughts and suggestions how to fix this, will be appreciated. Thanks in advance.

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  • Deployment of SQL compact Edition (SDF files) using Setup project

    - by Emad
    Hi, I have a C#.NET desktop application using SQL Compact edition as data store. The application should be used by any user on the machine and all should be seeing the same data ( data should not different per user). I am wondering where should I deploy the SDF file? User's Personal data folder (My Documents) means each user will have a separate database. Deploying on the same folder as the application causes vista to copy the file to \USers\Appdata\local\VirtualStore\ and it seems to make different copies for each user. Where is it best to deploy the SDF file to ensure all users are looking at the same data?

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  • Beginner to RUBY - require_relative problem

    - by WANNABE
    Hi, I'm learning Ruby (using version 1.8.6) on Windows 7. When I try to run the stock_stats.rb program below, I get the following error: C:\Users\Will\Desktop\ruby>ruby stock_stats.rb stock_stats.rb:1: undefined method `require_relative' for main:Object (NoMethodE rror) I have three v.small code files: stock_stats.rb require_relative 'csv_reader' reader = CsvReader.new ARGV.each do |csv_file_name| STDERR.puts "Processing #{csv_file_name}" reader.read_in_csv_data(csv_file_name) end puts "Total value = #{reader.total_value_in_stock}" csv_reader.rb require 'csv' require_relative 'book_in_stock' class CsvReader def initialize @books_in_stock = [] end def read_in_csv_data(csv_file_name) CSV.foreach(csv_file_name, headers: true) do |row| @books_in_stock << BookInStock.new(row["ISBN"], row["Amount"]) end end # later we'll see how to use inject to sum a collection def total_value_in_stock sum = 0.0 @books_in_stock.each {|book| sum += book.price} sum end def number_of_each_isbn # ... end end book_in_stock.rb require 'csv' require_relative 'book_in_stock' class CsvReader def initialize @books_in_stock = [] end def read_in_csv_data(csv_file_name) CSV.foreach(csv_file_name, headers: true) do |row| @books_in_stock << BookInStock.new(row["ISBN"], row["Amount"]) end end # later we'll see how to use inject to sum a collection def total_value_in_stock sum = 0.0 @books_in_stock.each {|book| sum += book.price} sum end def number_of_each_isbn # ... end end Thanks in advance for any help.

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  • How to index and search subversion repository

    - by Theo Briscoe
    I have access to a very large code base stored in a subversion repository. I would like to be able to perform Google type searched on the code base. I have done this before when I have access to the server by creating a network share and using Google desktop. I currently do not have access to this subversion server box. Any Ideas? Some more info The code base is company wide and large Don't want to download the entire code base for the entire business on my laptop My goal understand what code is available inside the company The code changes often Wondering if there are any tool that can search remote svn repositories?

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  • Unable to upload a file.

    - by Crazy
    User 'X' is the site-collection owner. He tries to upload a 500kb file into a document library, got the error "The server has aborted your upload. The files selected may exceed the server's upload size limit. If you are transfering a large group of files, try uploading fewer at a time." however web-application owners are able to upload the file. what would be the issue, any thoughts? Upload size limit for a file – 5 MB Site Quota template set – 50 MB Used Site Quota – 10 MB file format: pdf file size : 500kb file is on : desktop special characters : no Os : xP IE : 6.0 .Net : 3.5 any thoughts?

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  • Using GoogleMaps with JXMapViewer

    - 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.

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  • JPA 2.0, hiberante 3.5, jars & persistence.xml location

    - by phmr
    I'm building a desktop application using hibernate 3.5 & JPA 2.0. I have 2 jars, the lib, which defines every entity and DAO, packages looks like this : org.my.package.models org.my.package.models.dao org.my.package.models.utils In org.my.package.utils I defined my hibernate utility class for getting EM & EMF instances, which means the lib is bound to a Persistence Unit name but that's not a problem for now (anyway you can recommend me a better way to manage that) the second jars is built as follow: org.my.package.app META-INF is defined on the root of the project which means in my jar I can find this directories directly in the root: META-INF/ META-INF/persistence.xml org/ org/my/ ... org/my/package/app/Main.class META-INF/ When I run the app, hibernate doesn't managed to find persistence.xml it throws an exception something like "package or class for PersistenceUnitName not found". I googled a bit about the problem but I can't get the source code organisation right. Any help ?

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  • django internationalization doesn't work

    - by xRobot
    I have: * created translation strings in the template and in the application view. * run this command: django-admin.py makemessages -l it and the file it/LC_MESSAGES/django.po has been created * translated strings in the django.po file. * run this command: django-admin.py compilemessages and I receive: processing file django.po in /home/jobber/Desktop/library/books/locale/it/LC_MESSAGES * set this in settings.py: LANGUAGE_CODE = 'it' TEMPLATE_CONTEXT_PROCESSORS = ( "django.core.context_processors.auth", "django.core.context_processors.debug", "django.core.context_processors.i18n", "django.core.context_processors.media", ) USE_I18N = True MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', ) but.... translation doesn't work !! I always see english text. Why ?

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  • MVC with cocoa/objective-c

    - by Leonardo
    Hi all, I have a strong j2ee background, and I am trying to move to objective-c for some desktop/iphone programming. I used many java web frameworks with mvc in mind, spring and struts ecc... so I am used to have servlet or controller which pass attributes to jsp pages, which is the view. In jsp pages with jstl you can call this attribute and render to video. In this way controller and view are (in theory) clearly separated. With xcode, I can easily recognize the controller and the view built with IBuilder. All the tutorial I found, shown the controller which go and change directly labels or text fields. So my two questions: seems to me that there's no separation between the two (controller and view), where I am wrong in that ? is there a way for a controller to pack all objects in a kind of context in a j2ee way and have the view read that context ? thanks Leonardo

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  • How to set global hook for WH_CALLWNDPROCRET ?

    - by user261882
    Hello I want to set global hook that tracks which application is active. In my main program I am doing the foloowing : HMODULE mod=::GetModuleHandle(L"HookProcDll"); HHOOK rslt=(WH_CALLWNDPROCRET,MyCallWndRetProc,mod,0); The hook procedure which is called MyCallWndRetProc exists in separate dll called HookProcDll.dll. The hook procedure is watching for WM_ACTIVATE message. The thing is that the code stucks in the line where I am setting the hook, i.e in the line where I am calling ::SetWindowsHookEx. And then Windows gets unresponsive, my task bar disappears and I am left with empty desktop. Then I must reset the computer. What am doing wrong, why Windows get unresponsive ? and Do I need to inject HookProcDll.dll in every process in order to set the global hook, and how can I do that ?

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  • Custom View with Bindings in a NSTableCellView

    - by Kyle Kinkade
    i have an XCode 4 project for mac desktop. It has a tableview in it that uses NSTableCellViews. The TableView is connected to an NSArrayController to provide it's content. This is using bindings for custom labels and the like, which has worked out rather well. I have a custom view that i would like to put in the NSTableCellView, which will use custom drawing based on a NSNumber value from my Table Cell View binding. Since XCode 4, you can no longer have ibplugins, which means i can no longer create custom bindings for interface builder to work with. How can I still get this value to my custom view?

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  • gcc ignores LC_ALL

    - by user332433
    Hi, I was trying to get gcc give error message in a different language. But it still gives me the error message in english. my locale output varun@varun-desktop:$ locale LANG=en_IN LC_CTYPE="es_EC.utf8" LC_NUMERIC="es_EC.utf8" LC_TIME="es_EC.utf8" LC_COLLATE="es_EC.utf8" LC_MONETARY="es_EC.utf8" LC_MESSAGES="es_EC.utf8" LC_PAPER="es_EC.utf8" LC_NAME="es_EC.utf8" LC_ADDRESS="es_EC.utf8" LC_TELEPHONE="es_EC.utf8" LC_MEASUREMENT="es_EC.utf8" LC_IDENTIFICATION="es_EC.utf8" LC_ALL=es_EC.utf8 gcc.mo is present in my /usr/share/local/es i am also getting the error messages for other programs like apt in spanish but not gcc. Can anybody help me in this regard?? I am using gcc-4.4.3 on 64bit ubuntu 10.04 machine thank you

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  • Cocoa Memory Usage

    - by user288024
    I'm trying to track down some peculiar memory behavior in my Cocoa desktop app. My app does a lot of image processing using NSImage and uploads those images to a website over HTTP using NSURLConnection. After uploading several hundred images (some very large), when I run Instrument I get no leaks. I've also run through MallocDebug and get no leaks. When I dig into object allocations using Instrument I get output like this: GeneralBlock-9437184, Net Bytes 9437184, # Net 1 GeneralBlock-192512, Net Bytes 2695168, # Net 14 and etc., for smaller sizes. When I look at these in detail, they're marked as being owned by 'Foundation' and created via NSConcreteMutableData initWithCapacity. During HTTP upload I'm creating a post body using NSMutableData, so I'm guessing these are buffers Cocoa is caching for me when I create the NSMutableData objects. Is there a way to force Cocoa to free these? I'm 90% positive I'm releasing correctly (and Instruments and MallocDebug seem to confirm this), but I think Cocoa is keeping these around for perf reasons since I'm allocating so many MSMutableData buffers.

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  • .gitconfig error

    - by Tanner
    I edited my .gitconfig file to add support for LabView and it appears that I did something that Git doesn't exactly like. The problem is it (Git) doesn't tell me what it doesn't like. What did I do wrong? The error message doesn't help much either: "fatal: bad config file line 13 in c:/Users/Tanner/.gitconfig" [gui] recentrepo = C:/Users/Tanner/Desktop/FIRST 2010 Beta/Java/LoganRover [user] name = Tanner Smith email = [email protected] [merge "labview"] name = LabView 3-Way Merge driver = “C:\Program Files\National Instruments\Shared\LabVIEW Merge\LVMerge.exe” “C:\Program Files\National Instruments\LabVIEW 8.6\LabVIEW.exe” %O %B %A %A recursive = binary And I'm not seeing a line 13, but usually that would mean something is wrong at the end? I don't know, Git is new to me.

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  • Android Compound Control internal click events

    - by Simon
    Hi, I'm writing a custom compound control that extends RelativeLayout. Inside this component, there is an ImageView. I add a OnClickListener to this ImageView to animate it when the user clicks on it. But when I am in an activity using this control and I add a OnClickListener on the control, this listener is never called. It only works when I remove the other listener I have on the ImageView. Does anybody knows how to "propagate" the event to the other listeners when I catch it inside the control? Thanks! PS: I would also like to know if there is an existing control that looks like the icons on the Android desktop. Like an icon with text underneath.

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  • java enterprise project

    - by darko petreski
    Hi All, All the time we are hearing that java is enterprise. We have read many books about jpa, entity beans and other stuff. All this books explain this technology with some dummy examples. I have not seen a book that explains real problems with enterprise beans, java clients and security! I mean real book not some imaginated stupid examples . Is there any book that describes completely some enterprise system, Its architecture, communication, security, of course the client that uses the distributed components ? I need a book that will cover the flowing: server side components (ejb, jpa) client side java desktop application security (authentication and authorization) web services with complete authentication clustering (we can find for all of this a book, but there is no book that covers all this things in one piece. Also all the books are with dummy samples.) Or may be some project that is documented. Regards, Darko

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  • Visual Basic 2010: How to make window/form become active foreground?

    - by hervard
    I'm using Visual Basic 2010 Express. I have a form that can be minimized. There's also a tray icon. I've coded it so that if you double-click on the tray icon, the form's FormWindowState becomes set to Normal; this restores the form to where it to where it was before it became minimized, but the form does not become the active window on my desktop. How can I make the form become the active most foreground window? I've tried various functions that I can think of but no luck yet. Tried searching with various queries to try and find the right wording but no luck. I'm new to Visual Basic - only started a couple hours ago. Probably something simple but I can't seem to find the correct function or anything... Please enlighten me! Thanks.

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  • Cross Platform Tips, Tricks & Gotchas

    - by codeelegance
    If you've worked on a cross platform development project: What did you learn from the experience? What worked? What didn't? What problems did you run into and how did you solve them? Did you aim for consistent appearance and functionality across all platforms or try to take advantage of each platform's strengths? What language and cross platform libraries did you use and did they live up to their claims? Was it a desktop application or web-based?

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  • Learn MacRuby or Objective-C?

    - by MaxD
    Well, my fisrt question was a bit too general so i ll try again and hope this one is better. The way i see it is: Ruby-MacRuby or IronRuby or Rails Obj-c-Mac Development So Ruby has clearly more potential in desktop and web platforms and now with MacRuby, OSX native (and commercial) apps are on the way. If i get it wrong please correct me. For me that i will do a fresh start should i go with the modern Ruby or start learning c+obj-c? Will a newcomer benefit much (in learning & coding time, frustration, complexity) by learning/using macruby for osx apps rather objective-c? Or its pretty much the same? I hope some day to hang around here and help others.

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