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  • Ramifications of CheckForIllegalCrossThreadCalls=false

    - by Ron Skufca
    I recently updated an application from VS2003 to VS2008 and I knew I would be dealing with a host of "Cross-thread operation not valid: Control 'myControl' accessed from a thread other than the thread it was created on" I am handling this in what I beleive is the correct way (see code sample below). I am running into numerous controls that are going to need a similar fix. Not wanting to have similar code for every label, textbox etc.. that are being accessed by a non UI thread. What are the ramifications of just setting the CheckForIllegalCrossThreadCalls = false for the entire app? I found a CodeProject article with various workarounds and a warning at the bottom to NOT set the property. I am looking for other opinions/experiences on this issue. private void ShowStatus(string szStatus) { try { if (this.statusBar1.InvokeRequired) { BeginInvoke(new MethodInvoker(delegate() { ShowStatus(szStatus); })); } else { statusBar1.Panels[0].Text = szStatus; } } catch (Exception ex) { LogStatus.WriteErrorLog(ex, "Error", "frmMNI.ShowStatus()"); } }

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  • Adding subview, gets delayed?

    - by user289510
    Hi, i didn't really know how to title this question, but here's a thing that really kills me: In my app i have a UITableView, UISegmentedControl and UINavigationBar. Once UISegmentedControl gets one of its segments selected i want to show a UIActivityIndicatorView on the UINavigationBar and then parse an xml file and present the results in a table. Everything works almost as i want it to, except one thing, the activity indicator view gets added to the uinavigationbar after the parser finishes, even though the method showLoading that adds UIIndicatorView to UINavigationBar gets before parser is initialised. Can anyone explain it? is there something i might be missing? maybe the ui needs to get redrawn? thanks peter

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  • WPF/.NET data access models - resource recommendations

    - by jasonk
    We're in the early design/prep phases of transferring/updating a rather large "legacy" 3 tier client-server app to a new version. We’re looking at doing WPF over Winforms as it appears to be the direction Microsoft is pushing development of the future and we’d like the maximize the life cycle/span of the apps. That said during the rewrite we’d like to make as many changes to our data access/presentation model to improve performance as much as possible up front as many. I’ve been doing some research along that vein but the vast majority of the resources I've found that discuss WPF focus only simple data tracking apps or focus on the very basics UI design/controls. The few items that even discuss data presentation are fairly elementary in depth. Are there any books/articles/recommended reading/other resources recommended for development related to large enterprise level business apps? Any “gotchas” that should/could be avoided? General advice to minimize the time underwater

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  • How to use a CTabCtrl in a MFC dialog based application ?

    - by shan23
    I need to do something which i expected to be was simple - create a tab control which has 2 tabs, implying 2 modes of operation for my app. When user clicks on Tab1, he'll be presented with some buttons and textboxes, and when he clicks Tab2, some other input method. I noticed that there was a CTabCtrl class thats used in MFC to add tabs. However, once I added the tab ctrl using the UI designer, I couldn't specify how many tabs there'll be using property window. Searching on the net, I found some examples but all of them required you to derive from CtabCtrl , create 2 or more child dialogs etc and to write your own custom class. My question is, since I want to do something so basic, why couldn't I do it using the familiar Add Event handler/Add member variable wizard and then handle everything else inside my app's class ? Surely, the default CTabCtrl class can do something useful without needing to derive from it ?

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  • Why the same code in WPF is slower than in Windows Forms?

    - by Marco Bettiolo
    I made bunch of benchmarks of the framework 4.0 and older and I can't understand why the same code is slower when using WPF compared to Windows Forms: This is the code, it has nothing to do with the UI elements: Random rnd = new Random(845038); Int64 number = 0; for (int i = 0; i < 500000000; i++) { number += rnd.Next(); } The code takes 5968ms - 6024ms to execute in Windows Forms and 6953ms in WPF. Here is the post with the downloadable solution: http://blog.bettiolo.it/2010/04/benchmark-of-net-framework-40.html

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  • What's the usual term for a local IIS/web application with services?

    - by JBRWilkinson
    I've inherited a multi-technology project which comprises a Flash user interface contained in a web-browser-like host and has an ASP.NET piece which provides web services to the Flash UI, background/watchdog services plus a web application for administration of the system. Our transatlantic project conference calls are getting confusing due to the various terms people use to describe the ASP.NET piece. Indeed, ASP.NET has its' own project terminology including 'Web Site' and 'Web Application' to both of which one can add a 'Web Service'. Is there any commonly-used name for this ASP.NET multi-purpose project piece?

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  • Android: Is there a universal way to send the MMS on any android devices?

    - by Roces
    This code works on the plain google devices with native android system. But there is no MMS app in the list on htc sense devices and I don't know about Motorola Blur etc.: final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); emailIntent.setType("image/png"); emailIntent.putExtra(Intent.EXTRA_STREAM, uri); context.startActivity(Intent.createChooser(emailIntent, context.getString(R.string.send_intent_name))); This code works on the htc sense but not from the Chooser, what I really need: Intent sendIntent = new Intent("android.intent.action.SEND_MSG"); sendIntent.putExtra(Intent.EXTRA_STREAM, uri); sendIntent.setType("image/png"); context.startActivity(sendIntent); But I don't know how to combine this code samples together and I don't know how to determine Htc Sense ui programmatically. Is it right way to support different type of devices? Thank you for answers.

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  • How to do manual DI with deep object graphs and many dependencies properly

    - by Fabian
    I believe this questions has been asked in some or the other way but i'm not getting it yet. We do a GWT project and my project leader disallowed to use GIN/Guice as an DI framework (new programmers are not going to understand it, he argued) so I try to do the DI manually. Now I have a problem with deep object graphs. The object hierarchy from the UI looks like this: AppPresenter-DashboardPresenter-GadgetPresenter-GadgetConfigPresenter The GadgetConfigPresenter way down the object hierarchy tree has a few dependencies like CustomerRepository, ProjectRepository, MandatorRepository, etc. So the GadgetPresenter which creates the GadgetConfigPresenter also has these dependencies and so on, up to the entry point of the app which creates the AppPresenter. Is this the way manual DI is supposed to work? doesn't this mean that I create all dependencies at boot time even I don't need them? would a DI framework like GIN/Guice help me here?

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  • SharePoint Client JavaScript Documentation

    - by G N
    I'm attempting to improve the usability of a client's SharePoint deployment via JQuery; and am hitting a brick wall when trying to find any sort of documentation of what's happening in core.js (aside from painfully digging through and trying to parse any sort of meaning out of it --all 250kb of it!!!!--) Anyone have any pointers, or documentation? EDIT: Sorry, to clarify my question, i'm familiar with using JQuery with SharePoint. My question involves hooking JQuery into SharePoint's own client API. My question is inspired by this post http://www.codefornuts.com/2009/09/forcing-sharepoint-into-asynchronous.html# ; where the author is overriding methods such as "SubmitFormPost" and "STSNavigate" in order to make the UI interaction more "AJAXy".

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  • AsyncTask and onDestroy...

    - by stormin986
    I have an activity initiate a few AsyncTask downloads. After two of the three finish, it issues an Intent to load the next activity while still finishing up the last download. Obviously in onDestroy() i will call cancel() on all AsyncTask objects. If the OS tries to destroy my activity after the next activity starts, it will call and begin executing onDestroy in the apps UI thread, right? It won't wait for that AsyncTask to complete, correct? In all cases it will ultimately call onDestroy(), in turn canceling all AsyncTasks?

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  • What is the best free Java based bug tracker?

    - by Vladimir Dyuzhev
    For internal development team I'm looking for a bug tracker. Important requirements are: Free (must have) WAR/EAR-deployable (must have; support team prefers to have all apps deployed same way) Nice UI (nice to have) UPDATE Since I wrote this, Atlassian has introduced a $10 (ten, not ten thousand!) version of JIRA for 10 developers. I think it's as good as it can get -- best issue tracker out there with all enterprise features, for the cost of a few coffees. I have bought it for my current group out of my own pocket (to avoid bureaucracy).

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  • Which Java modules get Spring Security

    - by HDave
    I have a classic Java SOA application, with a web UI module, web services module, a service module (Java API), a domain module and a persistence module. In a sense, each of these modules has their own public API. My understanding of Spring Security is that I can use web filters to handle the security of the web gui and web services, and method level security (via annotations) for the service module. My question is this: should I bother to add method level security to the domain module and the persistence module or is that considered overkill?

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  • Does the Frontier Kernel have a future?

    - by pbreitenbach
    Whatever you think about Dave Winer, Frontier is an incredible piece of software. It includes quite a few advances that have yet to be surpassed: the object database, the database viewer, the scripting environment, the hierarchical-including website generation scheme, the elegant scripting language, the mixing of scripts and compilation, rapid prototyping, built in web server, simple debugger, cross-platform, simple UI, etc. My question: Dave turned Frontier over to open source and there is a Frontier Kernel project. However it is fairly quiet. Does Frontier have a future from here?

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  • Building Cocoa UIs for OS X with C# and Mono

    - by Antony Perkov
    Has anyone spent any time comparing the various Objective C bridges and associated Cocoa wrappers for Mono? I want to port an existing C# application to run on OS X. Ideally I'd run the application on Mono, and build a native Cocoa UI for it. I'm wondering which bridge would be the best choice. In case it's useful to anyone, here are some links to bridges I've found so far: CocoSharp - distributed with Mono on OS X - www.cocoa-sharp.com Monobjc - better documentation than the others (in my opinion) - www.mono-project.com/CocoaSharp and www.monobjc.net NObjective - (apparently) faster than the others - code.google.com/p/nobjective MObjc / MCocoa - code.google.com/p/mobjc and code.google.com/p/mcocoa ObjC# - www.mono-project.com/ObjCSharp

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  • connecting to a webservice from android - AsyncTask or Service?

    - by football
    I'm writing an android app that will connect to a REST/JSON webservice. Users will be retrieving information, uploading comments, downloading and uploading images etc. I know that I shouldn't keep all this network communication in the Activity/UI thread, as it will cause ANRs. What I'm confused about is whether I should use an AsyncTask or a Service with "manual" threading to accomplish this; With a Service, I'd simply have a public method for each method in the webservice's API. I'd then implement threading within each of these methods. If I used an AsyncTask, I would create a helper class that defined AsyncTasks for each method in the webservice's API. Which method is preferred? Interaction with the webservice will only happen while the user is in the Activity. Once they switch to another application, or exit the program, there is no need for communication with the webservice.

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  • Qt for Symbian - Detecting touch/non-touch devices...

    - by Nikos
    I'm porting a game for Symbian which supports both a touch & non-touch UI. I need to be able to tell if the device has a touch screen on start-up so I can enable the appropriate mode. After googling for hours and going though the Qt Docs I found QSysInfo but this merely provides the version of the Symbian device. Is there a way to get the actual capabilities of the device? There must be a way to tell if the device has a touch screen...! I'm using the latest QtCreator with the NokiaSDK. Thank you in advance, Nikos.

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  • wxHaskell on OS X

    - by Bill
    I want to use wxHaskell on OS X (Snow Leopard, MacBook Pro). I was able to install the library successfully and the script below: module Main where import Graphics.UI.WX main :: IO () main = start hello hello :: IO () hello = do f <- frame [text := "Hello!"] quit <- button f [text := "Quit", on command := close f] set f [layout := widget quit] does result in a window being displayed with a single button, as specified. However, nothing happens when I click the button - I don't even get the visual response of the button turning blue to indicate that it's been depressed (haha, no pun intended). I've heard that you have to run a package called "macosx-app" on wxHaskell binaries to get them to run, but I can't find this anywhere. It's not on my machine or (as far as I can tell) in the WX or wxHaskell distros. Anyone know what I need to do to get this to work?

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  • Approaches to wrapping access to functionality in .NET MVC?

    - by Kevin
    What are some different solutions to wrapping access to functionality within a .NET MVC application? For example, I have six tabs that represent different areas of the application and within area 1, there is the ability to add, edit, upload, whatever. I need a central way to say: Build some dictionary of what the user can do Wrap tabs, buttons, links, etc, validate the user can access this piece of functionality and show/hide appropriately. I know I can restrict access to actions via action filters and roles, but what about from the UI? Any help would be appreciated. I am sure I am not the only one who has needed to do this, thanks!

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  • Opting out of `dragenter` and `dragover` events (html5)

    - by aaaidan
    I have a collection of draggable "content" elements, and a root-level "feedback" UI element which is displayed above them to provide feedback during drag and drop. The problem is, during the drag operation, hovering over the "feedback" element causes the dragenter and dragover events to be fired on that element, rather than the underlying content element. It effectively "blocks" the dragenter event from firing on the correct element. Is there a way for an element to cancel, or "opt out" of a dragenter/dragover event? I could display the feedback element underneath the content, but I'd rather not do that. jsFiddle: http://jsfiddle.net/jact8/1/ I'm using the HTML drag/drop api, not jQuery or anything like that.

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  • ASP.NET with VS 2008 How to Run Root "/" with Local Web Server

    - by harrije
    I want to use the built-in web server for VS 2008 and have it run my web-site project as the top level root "/". Instructions for VS 2005 can be found at: http://weblogs.asp.net/scottgu/archive/2006/12/19/tip-trick-how-to-run-a-root-site-with-the-local-web-server-using-vs-2005-sp1.aspx My problem is with step 3 of the instructions. When the the web-site project node is selected, right click never gives me an option to select a property-grid like that shown under step 3. Nor could I find another way in the menu or tool bar to get the property-grid. I don't know if the UI difference I'm seeing has to do with me using VS 2008 and the instructions are for VS 2005 or what? How do I get the web-site property-grid for VS 2008, or is there an alternative way to get the root setup I want?

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  • Problem with referencing CSS and Javascript files relatively

    - by Markus
    I have an IIS web site. This web site contains other web sites so the structure is like this. \ MainWebSite\ App1\ App2\ All sites are Asp.net MVC Webapplications. In the MasterPage of App1, I reference the script files like this: <script type="text/javascript" src="../../Scripts/jquery-ui-1.8.custom.min.js"> </script> The Problem is that he now tries to find the File at http:\server\MainWebSite\Scripts.... how can i work around that? Should I put all my Scripts and CSS files into the root directory, is that a preferred solution?

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  • Is it better to comment out unneeded code or delete it?

    - by Matt Connolly
    For web applications under maintenance, assuming you have source control, when you need to remove part of the UI and the associated code, do you delete the code and check in, or do you comment out the old code? Arguments in favor of deleting: cleaner code, can still see deleted code in source control history, no worrying about refactoring code that might be uncommented some day. Arguments in favor of commenting: sometimes you need to add the feature back in and the developer adding it back in may not know to check source control history, sometimes the code represents unique functionality that can be a handy reference, seeing it all in one place can help provide clues to deciphering the active code.

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  • using KVO to filter an NSTableView using NSPredicate (with arrays)

    - by KingRufus
    My UI is not updating when I expect it to. The application displays "projects" using a view similar to iTunes -- a source list on the left lets you filter a list (NSTableView) on the right. My filters update properly when they are examining any simple field (like name, a string), but not for arrays (like tags). I'm removing a tag from one of my objects (from an NSMutableArray field called "tags") and I expect it to disappear from the list because it no longer matches the predicate that is bound to my table's NSArrayController. ProjectBrowser.mm: self.filter = NSPredicate* srcPredicate = [NSPredicate predicateWithFormat:@"%@ IN %K", selectedTag, @"tags"]; Project.mm: [self willChangeValueForKey:@"tags"]; [tags removeAllObjects]; [self didChangeValueForKey:@"tags"]; I've also tried this, but the result is the same: [[self mutableArrayValueForKey:@"tags"] removeAllObjects]; Interface Builder setup: a ProjectBrowser object is the XIB's File Owner an NSArrayController (Project Controller) has its Content Array bound to "File's Owner".projects Project Controller's filter predicate is bound to "File's Owner".filter NSTableView's column is bound to "Project Controller".name

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  • Developing "Command Line" in .NET?

    - by Sergey Malyan
    Imagine a "search box" on the right top side of the UI Windows Application. When user types a desired action, a matching functionality is executed. Screen gets opened, or action gets performed. For example: user types "create" and intellisence offered next word options "client"/"product", user picks "client", and "Create New Client" screen opens up. So what I am looking for if there is a framework support for this. I assume that framework shall bind together text commands names, commands and show in intellisense. Same framework possibly could have been used in alternative "Command Line interface". I recall Microsoft had some recent framework that helps to setup "command Line Interface" environmental. It is hard to search on web for this keywords, so relying on intelligent help from you guys. Thanks in advance.

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  • Can a variable bu used 2nd time after releasing it?

    - by Jakub
    Hello, I try to understand the memory management in ObjectiveC and still some things are a misery for me. I've got an instance variable: NSMutableArray *postResultsArray; when a button is clicked in the UI I create new array: self.postResultsArray = [NSMutableArray array]; then I add some objects to the array and when the whole operation is done I would like to release the array: [self.postResultsArray release]; (I assume that all the objects stoed in the array will be released along with the array). The problem appears when I click the button again and in the code I want to create the array again with: self.postResultsArray = [NSMutableArray array]; I get: [CFArray release]: message sent to deallocated instance 0x3d9e390 Can't I initialize the same instance variable for the second time? or maybe I should not release it? and if so, why? Thanks!

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