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  • Running multiple image manipulations in parallel causing OutOfMemory exception

    - by Tom
    I am working on a site where I need to be able to split and image around 4000x6000 into 4 parts (amongst many other tasks) and I need this to be as quick as possible for multiple users. My current code for doing this is var bitmaps = new RenderTargetBitmap[elements.Length]; using (var stream = blobService.Stream(key)) { BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.StreamSource = stream; bi.EndInit(); for (var i = 0; i < elements.Length; i++) { var element = elements[i]; TransformGroup transformGroup = new TransformGroup(); TranslateTransform translateTransform = new TranslateTransform(); translateTransform.X = -element.Left; translateTransform.Y = -element.Top; transformGroup.Children.Add(translateTransform); DrawingVisual vis = new DrawingVisual(); DrawingContext cont = vis.RenderOpen(); cont.PushTransform(transformGroup); cont.DrawImage(bi, new Rect(new Size(bi.PixelWidth, bi.PixelHeight))); cont.Close(); RenderTargetBitmap rtb = new RenderTargetBitmap(element.Width, element.Height, 96d, 96d, PixelFormats.Default); rtb.Render(vis); bitmaps[i] = rtb; } } for (var i = 0; i < bitmaps.Length; i++) { using (MemoryStream ms = new MemoryStream()) { PngBitmapEncoder encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bitmaps[i])); encoder.Save(ms); var regionKey = WebPath.Variant(key, elements[i].Id); saveBlobService.Save("image/png", regionKey, ms); } } I am running multiple threads which take jobs off a queue. I am finding that if this part of code is hit by 4 threads at once I get an OutOfMemory exception. I can stop this happening by wrapping all the code above in a lock(obj) but this isn't ideal. I have tried wrapping just the first using block (where the file is read from disk and split) but I still get the out of memory exceptions (this part of the code executes quite quickly). I this normal considering the amount of memory this should be taking up? Are there any optimisations I could make? Can I increase the memory available? UPDATE: My new code as per Moozhe's help public static void GenerateRegions(this IBlobService blobService, string key, Element[] elements) { using (var stream = blobService.Stream(key)) { foreach (var element in elements) { stream.Position = 0; BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.SourceRect = new Int32Rect(element.Left, element.Top, element.Width, element.Height); bi.StreamSource = stream; bi.EndInit(); DrawingVisual vis = new DrawingVisual(); DrawingContext cont = vis.RenderOpen(); cont.DrawImage(bi, new Rect(new Size(element.Width, element.Height))); cont.Close(); RenderTargetBitmap rtb = new RenderTargetBitmap(element.Width, element.Height, 96d, 96d, PixelFormats.Default); rtb.Render(vis); using (MemoryStream ms = new MemoryStream()) { PngBitmapEncoder encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(rtb)); encoder.Save(ms); var regionKey = WebPath.Variant(key, element.Id); blobService.Save("image/png", regionKey, ms); } } } }

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  • SugarCRM installation frozen

    - by Tom S.
    Hi there. I'm trying to install SugarCRM version 5.5.1. on a webhost. Everything goes nice until the step when the installation begins. The output is this one: Creating Sugar configuration file (config.php) Creating Sugar application tables, audit tables and relationship metadata ............. And never moves on! I check the database and can see that there are tables missing. The install.log file doesnt have any errors, and the last line in the file is: 2010-04-27 22:17:03...creating Relationship Meta for Bug It seems the installation stopped here, but i cant get why! Iv searched in the foruns, etc, but cant get it... Anyone had this issue? Any clues about whats happening? Thanks a lot

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  • Setup GIT Server with Msysgit on Windows

    - by Tom
    Hi Guys, My friends and I are trying to setup GIT for windows using this tutorial but we just keep running into problems. I know many of you guys on this site are GIT gurus - so I was wondering whether anyone would be able to help us (and I am sure 100s of other Windows Devs who want to use GIT) write a "Setup GIT Server" guide for windows using Msysgit ? There is a comment on the guide above suggesting it cant be done with Msysgit because gitosis requires the use of an SSH Server and Bash ? Would really appreciate it if someone could do a step by step guide as there is not one available (we've search for hours)? Install Mysisgit ? Thx

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  • regex to match trailing whitespace, but not lines which are entirely whitespace (indent placeholders

    - by Tim
    I've been trying to construct a ruby regex which matches trailing spaces - but not indentation placeholders - so I can gsub them out. I had this /\b[\t ]+$/ and it was working a treat until I realised it only works when the line ends are [a-zA-Z]. :-( So I evolved it into this /(?!^[\t ]+)[\t ]+$/ and it seems like it's getting better, but it still doesn't work properly. I've spent hours trying to get this to work to no avail. Please help. Here's some text test so it's easy to throw into Rubular, but the indent lines are getting stripped so it'll need a few spaces and/or tabs. Once lines 3 & 4 have spaces back in, it shouldn't match on lines 3-5, 7, 9. some test test some test test some other test (text) some other test (text) likely here{ dfdf } likely here{ dfdf } and this ; and this ; Alternatively, is there an simpler / more elegant way to do this?

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  • Eclipse CDT: Import source / header files into my new project, without duplicating them

    - by Tom
    Hi all, Im sure there is a very simple solution for this. I have a bunch of .cpp / .h files from a project, say in directory ~/files On the other hand, I want to create a c++ project using eclipse to work on those files, so I put my workspace on ~/wherever. Then I create a c++ project: ~/wherever/project, and include the source files (located in /~files). The problem i'm having is that files are now duplicated in ~/wherever/project, and I would like to avoid that, specially so I know which copy of the file to commit. Is this possible? Im sure it is, but cant get it. Thanks in advance.

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  • How to Get JSF 2.0 Working with Eclipse 3.5 and JBoss 5.1

    - by Tom Tresansky
    I am running Eclipse 3.5 and JBoss 5.1. I want to create a JSF 2.0 project. I heard here that the Eclipse JBoss Tools plugin version 3.1 (available here) could do this for me. I have installed the plugin. However, if I go to the Project Facets properties page for a Dynamic Web Project, I only see Facets for JavaServer Faces 1.1 and 1.2. My Java facet is set at 6.0, and my Dynamic Web Module to 2.5. In the Targeted Runtimes properties page, I see that I am targeting the JBoss 5.1 Runtime. I understand that Eclipse Helios will be here next week, but I'm curious if its possible to get JSF 2.0 working with 3.5. Any thoughts?

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  • Managing data charts

    - by Tom Gullen
    My dbml file is just getting bigger and bigger and more unwieldy: I favoured an all-in-one approach as supposed to multiple data contexts because when I tried that it was near impossible to manage in code. I was advised it was better to have them all in one chart and the difficulty will be simply in managing this chart and not in code. The chart I've got is becoming a pain to manage, if I want to even remove a table and re-add it it sometimes takes a little while to manually find it! There isn't even a list I can find in VS2010 of the objects you have in that chart! Is there a better way of doing this?

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  • How to get target element of keypress in designmode iframe

    - by Tom
    Is it possible to get the target element in a keypress event handler in a design mode iframe ? I know it can be done in the mousedown event handler (by accessing event.target), but in the keypress / keydown handlers event.target is always the iframe element. For example, with the following html, if the user types into the div where it says * key press here *, I would like in the keypress / keydown event handler to be able to determine that the target element is the div with id='b'. Is this possible ? <div id='a'> <div id='b'> *** Key press here *** </div> </div>

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  • Android Launcher Shortcuts

    - by Tim
    I have made a simple punch in / punch out time clock application. I want to add the user the option of making a shortcut on the homescreen that will toggle the state of the app(time out / time in) but I don't want this shortcut to open up the app on the screen at all. here is my setupShortcut() private void setupShortcut() { Intent shortcutIntent = new Intent(this, Toggle.class); // shortcutIntent.setClassName(this, Toggle.class.getName()); shortcutIntent.putExtra(EXTRA_KEY, "ToggleShortcut"); shortcutIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); Intent intent = new Intent(); intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutIntent); intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, "ToggleShortcut"); Parcelable iconResource = Intent.ShortcutIconResource.fromContext(this, R.drawable.app_sample_code); intent.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource); setResult(RESULT_OK, intent); } Toggle.class is an activity that toggles the state for me. In the manifest I have these settings on it <activity android:name=".Toggle" android:exported="true" android:theme="@android:style/Theme.Translucent.NoTitleBar"> As it is now I can create a shortcut on the home screen then press it. The first time I press it it starts the Toggle activity and completes it fine, but it also opens up the TimeClock activity on the screen. If I then hit the back button I go back to the home. I can now press this shortcut and it will start the Toggle activity and not change the screen. Before I added: shortcutIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); It would open up the TimeClock activity every time. Now it is just the first time. But I want it to never show anything on the screen when the Toggle shortcut is pressed. Does anyone have any idea of how to get rid of that?

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  • JSINQ (Linq for JavaScript library) sub-queries (how-to)

    - by Tom Tresansky
    I'm using this library: jsinq. I want to create a new object using subqueries. For example, in .NET LINQ, I could do something like this: from a in Attendances where a.SomeProperty = SomeValue select new { .Property1 = a.Property1, .Property2 = a.Property2, .Property3 = (from p in People where p.SomeProperty = a.Property3 select p) } such that I get a list of ALL people where Property3 value matches the attendance's Property3 value in EACH object returned in the list. I didn't see any sample of this in the docs or on the playground. Made a couple tries of it and didn't have any luck. Anybody know if this is possible and how to?

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  • Running Command via Java ProccesBuilder Different to Running the same in the Shell

    - by Tom Duckering
    I'm tearing my hair out trying to work out why the command I'm executing via Java using a ProcessBuilder & Process is not working. I run the "same" command at the Windows command line and it works as expected. It must be that they're not the same but I can't for the life of me work out why. The command is this: ccm start -nogui -m -q -n ccm_admin -r developer -d /path/to/db/databasename -s http://hostname:8400 -pw Passw0rd789$ The output is should be a single line string that I need to grab and set as an environment variable (hence the v. basic use of the BufferedReader). My Java code, which when it runs the command gets an application error, looks like this with entry point being startCCMAndGetCCMAddress(): private static String ccmAddress = ""; private static final String DATABASE_PATH = "/path/to/db/databasename"; private static final String SYNERGY_URL = "http://hostname:8400"; private static final String USERNAME = "ccm_admin"; private static final String PASSWORD = "Passw0rd789$"; private static final String USER_ROLE = "developer"; public static List<String> getCCMStartCommand() { List<String> command = new ArrayList<String>(); command.add("cmd.exe"); command.add("/C"); command.add("ccm"); command.add("start"); command.add("-nogui"); command.add("-m"); command.add("-q"); command.add("-n "+USERNAME); command.add("-r "+USER_ROLE); command.add("-d "+DATABASE_PATH); command.add("-s "+SYNERGY_URL); command.add("-pw "+PASSWORD); return command; } private static String startCCMAndGetCCMAddress() throws IOException, CCMCommandException { int processExitValue = 0; List<String> command = getCCMStartCommand(); System.err.println("Will run: "+command); ProcessBuilder procBuilder = new ProcessBuilder(command); procBuilder.redirectErrorStream(true); Process proc = procBuilder.start(); BufferedReader outputBr = new BufferedReader(new InputStreamReader(proc.getInputStream())); try { proc.waitFor(); } catch (InterruptedException e) { processExitValue = proc.exitValue(); } String outputLine = outputBr.readLine(); outputBr.close(); if (processExitValue != 0) { throw new CCMCommandException("Command failed with output: " + outputLine); } if (outputLine == null) { throw new CCMCommandException("Command returned zero but there was no output"); } return outputLine; } The output of the System.err.println(...) is: Will run: [cmd.exe, /C, ccm, start, -nogui, -m, -q, -n ccm_admin, -r developer, -d /path/to/db/databasename, -s http://hostname:8400, -pw Passw0rd789$]

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  • How do i use signtool.exe correctly in hudson running as a service?

    - by Tim
    I just purchased a code signing cert (MS authenticode) from THAWTE and have installed it apparently on my build machine. I am logged in as a user and when I open a cmd prompt I can sign EXEs using the cert with signtool.exe. Unfortunately this same command line does not work in the hudson process that is running on the machine. the error message I get is: SignTool Error: No certificates were found that met all the given criteria. I presume this is because the hudson service is running under a different account than the account that I ran signtool.exe from and from the account I used to get the cert from thawte. So, my question is: How do I fix this problem? I thought i was going to download a file from thawte, but instead it just used IE somehow to install the cert in the user's cache magically. I probably want to export (or whatever the correct term is) to a file that I can store/save or use on any other machine. How do i do that and how do I call signtool correctly with either the file or the cert from another user in the system/services account?

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  • How to increment variable names/Is this a bad idea

    - by tom
    In Python, if I were to have a user input the number X, and then the program enters a for loop in which the user inputs X values, is there a way/is it a bad idea to have variable names automatically increment? ie: user inputs '6' value_1 = ... value_2 = ... value_3 = ... value_4 = ... value_5 = ... value_6 = ... Can I make variable names increment like that so that I can have the number of variables that the user inputs? Or should I be using a completely different method such as appending all the new values onto a list?

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  • Calculate time of method execution and send to WCF service async

    - by Tim
    I need to implement time calculation for repository methods in my asp .net mvc project classes. The problem is that i need to send time calculation data to WCF Service which is time consuming. I think about threads which can help to cal WCF service asynchronously. But I have very little experience with it. Do I need to create new thread each time or I can create a global thread, if so then how? I have something like that: StopWatch class public class StopWatch { private DateTime _startTime; private DateTime _endTime; public void Start() { _startTime = DateTime.Now; } protected void StopTimerAndWriteStatistics() { _endTime = DateTime.Now; TimeSpan timeResult = _endTime - _startTime; //WCF proxy object var reporting = AppServerUtility.GetProxy<IReporting>(); //Send data to server reporting.WriteStatistics(_startTime, _endTime, timeResult, "some information"); } public void Stop() { //Here is the thread I have question with var thread = new Thread(StopTimerAndWriteStatistics); thread.Start(); } } Using of StopWatch class in Repository public class SomeRepository { public List<ObjectInfo> List() { StopWatch sw = new StopWatch(); sw.Start(); //performing long time operation sw.Stop(); } } What am I doing wrong with threads?

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  • Why is my code signing (MS authenticode) verification failing?

    - by Tim
    I posted this question and have a freshly minted code signing cert from Thawte. I followed the instructions (or so I thought) and the code signing claims to be done right, however when I try to verify the tool shows an error. I have no idea what it means and no idea how to fix this. Any comments would be appreciated. Command line to sign exe: signtool sign /f mdt.pfx /p password /t http://timestamp.verisign.com/scripts/timstamp.dll test.exe Results: The following certificate was selected: Issued to: [my company] Issued by: Thawte Code Signing CA Expires: 4/23/2011 7:59:59 PM SHA1 hash: 7D1A42364765F8969E83BC00AB77F901118F3601 Done Adding Additional Store Attempting to sign: test.exe Successfully signed and timestamped: test.exe Number of files successfully Signed: 1 Number of warnings: 0 Number of errors: 0 Note that there are no errors or warnings. Now, when I try to verify imagine my surprise: signtool verify /v test.exe results in: Verifying: test.exe SHA1 hash of file: 490BA0656517D3A322D19F432F1C6D40695CAD22 Signing Certificate Chain: Issued to: Thawte Premium Server CA Issued by: Thawte Premium Server CA Expires: 12/31/2020 7:59:59 PM SHA1 hash: 627F8D7827656399D27D7F9044C9FEB3F33EFA9A Issued to: Thawte Code Signing CA Issued by: Thawte Premium Server CA Expires: 8/5/2013 7:59:59 PM SHA1 hash: A706BA1ECAB6A2AB18699FC0D7DD8C7DE36F290F Issued to: [my company] Issued by: Thawte Code Signing CA Expires: 4/23/2011 7:59:59 PM SHA1 hash: 7D1A42364765F8969E83BC00AB77F901118F3601 The signature is timestamped: 4/27/2010 10:19:19 AM Timestamp Verified by: Issued to: Thawte Timestamping CA Issued by: Thawte Timestamping CA Expires: 12/31/2020 7:59:59 PM SHA1 hash: BE36A4562FB2EE05DBB3D32323ADF445084ED656 Issued to: VeriSign Time Stamping Services CA Issued by: Thawte Timestamping CA Expires: 12/3/2013 7:59:59 PM SHA1 hash: F46AC0C6EFBB8C6A14F55F09E2D37DF4C0DE012D Issued to: VeriSign Time Stamping Services Signer - G2 Issued by: VeriSign Time Stamping Services CA Expires: 6/14/2012 7:59:59 PM SHA1 hash: ADA8AAA643FF7DC38DD40FA4C97AD559FF4846DE Number of files successfully Verified: 0 Number of warnings: 0 Number of errors: 1

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  • WiX: Installing Service as LocalService

    - by Tom the Junglist
    Hey there, I am trying to get my application an installer via WiX 3.0. The exact code is: <File Id="ServiceComponentMain" Name="$(var.myProgramService.TargetFileName)" Source="$(var.myProgramService.TargetPath)" DiskId="1" Vital="yes"/> <!-- service will need to be installed under Local Service --> <ServiceInstall Id="MyProgramServiceInstaller" Type="ownProcess" Vital="yes" Name="MyProgramAddon" DisplayName="[removed]" Description="[removed]" Start="auto" Account="LocalService" ErrorControl="ignore" Interactive="no"/> <ServiceControl Id="StartDDService" Name="MyProgramServiceInstaller" Start="install" Wait="no" /> <ServiceControl Id="StopDDService" Name="MyProgramServiceInstaller" Stop="both" Wait="yes" Remove="uninstall" /> Thing is, for some reason LocalService fails on the "Installing services" step, and if I change it to "LocalSystem" then the installer times out while trying to start the service. The service starts fine manually and at system startup, and for all intents and purposes works great. I've heard there are issues getting services to work right under LocalService, but Google isnt really helping as everyone's responses have been "got it to work kthx". Just looking to get this service set up and started during installation, that's all. Any help? Thanks!

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  • What strategy do you use for package naming in Java projects and why?

    - by Tim Visher
    I thought about this awhile ago and it recently resurfaced as my shop is doing its first real Java web app. As an intro, I see two main package naming strategies. (To be clear, I'm not referring to the whole 'domain.company.project' part of this, I'm talking about the package convention beneath that.) Anyway, the package naming conventions that I see are as follows: Functional: Naming your packages according to their function architecturally rather than their identity according to the business domain. Another term for this might be naming according to 'layer'. So, you'd have a *.ui package and a *.domain package and a *.orm package. Your packages are horizontal slices rather than vertical. This is much more common than logical naming. In fact, I don't believe I've ever seen or heard of a project that does this. This of course makes me leery (sort of like thinking that you've come up with a solution to an NP problem) as I'm not terribly smart and I assume everyone must have great reasons for doing it the way they do. On the other hand, I'm not opposed to people just missing the elephant in the room and I've never heard a an actual argument for doing package naming this way. It just seems to be the de facto standard. Logical: Naming your packages according to their business domain identity and putting every class that has to do with that vertical slice of functionality into that package. I have never seen or heard of this, as I mentioned before, but it makes a ton of sense to me. I tend to approach systems vertically rather than horizontally. I want to go in and develop the Order Processing system, not the data access layer. Obviously, there's a good chance that I'll touch the data access layer in the development of that system, but the point is that I don't think of it that way. What this means, of course, is that when I receive a change order or want to implement some new feature, it'd be nice to not have to go fishing around in a bunch of packages in order to find all the related classes. Instead, I just look in the X package because what I'm doing has to do with X. From a development standpoint, I see it as a major win to have your packages document your business domain rather than your architecture. I feel like the domain is almost always the part of the system that's harder to grok where as the system's architecture, especially at this point, is almost becoming mundane in its implementation. The fact that I can come to a system with this type of naming convention and instantly from the naming of the packages know that it deals with orders, customers, enterprises, products, etc. seems pretty darn handy. It seems like this would allow you to take much better advantage of Java's access modifiers. This allows you to much more cleanly define interfaces into subsystems rather than into layers of the system. So if you have an orders subsystem that you want to be transparently persistent, you could in theory just never let anything else know that it's persistent by not having to create public interfaces to its persistence classes in the dao layer and instead packaging the dao class in with only the classes it deals with. Obviously, if you wanted to expose this functionality, you could provide an interface for it or make it public. It just seems like you lose a lot of this by having a vertical slice of your system's features split across multiple packages. I suppose one disadvantage that I can see is that it does make ripping out layers a little bit more difficult. Instead of just deleting or renaming a package and then dropping a new one in place with an alternate technology, you have to go in and change all of the classes in all of the packages. However, I don't see this is a big deal. It may be from a lack of experience, but I have to imagine that the amount of times you swap out technologies pales in comparison to the amount of times you go in and edit vertical feature slices within your system. So I guess the question then would go out to you, how do you name your packages and why? Please understand that I don't necessarily think that I've stumbled onto the golden goose or something here. I'm pretty new to all this with mostly academic experience. However, I can't spot the holes in my reasoning so I'm hoping you all can so that I can move on. Thanks in advance!

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  • Canvas rotate from bottom center image angle?

    - by Tom
    How do you rotate an image with the canvas html5 element from the bottom center angle? See http://uptowar.com/test.php for my current code and image: <html> <head> <title>test</title> <script type="text/javascript"> function startup() { var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); var img = new Image(); img.src = 'player.gif'; img.onload = function() { ctx.translate(185, 185); ctx.rotate(90 * Math.PI / 180); ctx.drawImage(img, 0, 0, 64, 120); } } </script> </head> <body onload='startup();'> <canvas id="canvas" style="position: absolute; left: 300px; top: 300px;" width="800" height="800"></canvas> </body> </html> Unfortunately this seems to rotate it from the top left angle of the image. Any idea? Edit: in the end the object (space ship) has to rotate like a clock pointer, as if it is turning right/left.

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  • iPad leak - NSPushAutoreleasePool

    - by Tim Bowen
    We are getting a sizable leak (16kb) that is proving very difficult to eliminate. The responsible library is Foundation and the Responsible frame is NSPushAutoreleasePool. This leak does not appear on the iPhone, only the iPad. We get the following stack trace: 9 libSystem.B.dylib thread_assign_default 8 libSystem.B.dylib _pthread_start 7 WebCore RunWebThread(void*) 6 CoreFoundation CFRunLoopRunInMode 5 CoreFoundation CFRunLoopRunSpecific 4 CoreFoundation __CFRunLoopDoObservers 3 WebCore WebRunLoopLock(__CFRunLoopObserver*, unsigned long, void*) 2 Foundation NSPushAutoreleasePool 1 Foundation _NSAPAddPage 0 libSystem.B.dylib malloc We're getting a similar one in the frame NSAutoReleasePool. We've checked everywhere in the code we create an autoreleasepool to make sure we're releasing it. Since none of this is our code I'm not sure how to proceed. Thanks in advance.

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  • python - tkinter - update label from variable

    - by Tom
    I wrote a python script that does some stuff to generate and then keep changing some text stored as a string variable. This works, and I can print the string each time it gets changed. Problems have arisen while trying to display that output in a GUI (just as a basic label) using tkinter. I can get the label to display the string for the first time... but it never updates. This is really the first time I have tried to use tkinter, so it's likely I'm making a foolish error. What I've got looks logical to me, but I'm evidently going wrong somewhere! from tkinter import * outputText = 'Ready' counter = int(0) root = Tk() root.maxsize(400, 400) var = StringVar() l = Label(root, textvariable=var, anchor=NW, justify=LEFT, wraplength=398) l.pack() var.set(outputText) while True: counter = counter + 1 #do some stuff that generates string as variable 'result' outputText = result #do some more stuff that generates new string as variable 'result' outputText = result #do some more stuff that generates new string as variable 'result' outputText = result if counter == 5: break root.mainloop() I also tried: from tkinter import * outputText = 'Ready' counter = int(0) root = Tk() root.maxsize(400, 400) var = StringVar() l = Label(root, textvariable=var, anchor=NW, justify=LEFT, wraplength=398) l.pack() var.set(outputText) while True: counter = counter + 1 #do some stuff that generates string as variable 'result' outputText = result var.set(outputText) #do some more stuff that generates new string as variable 'result' outputText = result var.set(outputText) #do some more stuff that generates new string as variable 'result' outputText = result var.set(outputText) if counter == 5: break root.mainloop() In both cases, the label will show 'Ready' but won't update to change that to the strings as they're generated later. After a fair bit of googling and looking through answers on this site, I thought the solution might be to use update_idletasks - I tried putting that in after each time the variable was changed, but it didn't help. It also seems possible I am meant to be using trace and callback somehow to make all this work...but I can't get my head around how that works (I tried, but didn't manage to make anything that even looked like it would do something, let alone actually worked). I'm still very new to both python and especially tkinter, so, any help much appreciated but please spell it out for me if you can :)

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  • Capital in Bibtex

    - by Tim
    Hi, I want to show some letters in Bibliography as capital. For example: @misc{libsvm, abstract = {LIBSVM is an implbmentation of Support vector machine (SVM).}, author = {Chang, Chih-Chung}, howpublished = {\url{http://www.csie.ntu.edu.tw/~cjlin/libsvm/}}, keywords = {svm}, posted-at = {2010-04-08 00:05:04}, priority = {2}, title = {LIBSVM.}, url = "http://www.csie.ntu.edu.tw/~cjlin/libsvm/", year = {2008} } But "LIBSVM" is not shown as it is: [3] Chih-Chung Chang. Libsvm. http://www.csie.ntu.edu.tw/ ~cjlin/libsvm/, 2008. How can I make the letters capital? Thanks and regards!

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  • Can I do video communication with silverlight 4.0?

    - by tom greene
    With silverlight 4.0, it is possible to show a live video of the user on the screen: Here is the code VideoBrush videoBrush = new VideoBrush(); CaptureSource captureSource = new CaptureSource { VideoCaptureDevice = CaptureDeviceConfiguration.GetAvailableVideoCaptureDevices().First() }; bool b = CaptureDeviceConfiguration.RequestDeviceAccess(); videoBrush.SetSource(captureSource); captureSource.Start(); myrect.Fill = videoBrush; However, I am looking at a way to show the video to someone else - seeing oneself on screen is not that interesting. Is it possible? Do I need my own server? Can I use clowd services to do the communication? Are there performance issues?

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