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  • Adding JTextField to a JPanel and showing them

    - by Davide Gualano
    I'm building a little app using Java and Swing in NetBeans. Using NetBeans design window, I created a JFrame with a JPanel inside. Now I want to dynamically add some jTextFields to the JPanel. I wrote something like that: Vector textFieldsVector = new Vector(); JTextField tf; int i = 0; while (i < 3) { tf = new JTextField(); textFieldVector.add(tf); myPanel.add(tf); //myPanel is the JPanel where I want to put the JTextFields i++; } myPanel.validate(); myPanel.repaint(); But nothing happens: when I run the app, the JFrame shows with the JPanel inside, but the JTextFields don't. I'm a total newbie in writing graphical Java apps, so I'm surely missing something very simple, but I can't see what.

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  • Automating an application

    - by dacman
    I've always wondered the best way to automate use of a GUI in windows. When I was about 15, I wrote a little application that used some simple windows api functions to automatically click on certain locations on the screen based on a script. This could be used to automate GUI apps, but surely it's not the best way. So, my question is: What's the best way to automate use of a GUI in windows? Are there certain windows API functions that would be beneficial? If the program were to crash, how could you detect that? Thanks!

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  • What are people's opinions vis-a-vis my choice of authorization plugins?

    - by brad
    I'm slowly but surely putting together my first rails app (first web-app of any kind in fact - I'm not really a programmer) and it's time to set up a user registration/login system. The nature of my app is such that each user will be completely separated from each other user (except for admin roles). When users log in they will have their own unique index page looking at only their data which they and no-one else can ever see or edit. However, I may later want to add a role for a user to be able to view and edit several other user's data (e.g. a group of users may want to allow their secretary to access and edit their data but their secretary would not need any data of their own). My plan is to use authlogic to create the login system and declarative authorization to control permissions but before I embark on this fairly major and crucial task I thought I would canvas a few opinions as to whether this combo was appropriate for the tasks I envisage or whether there would be a better/simpler/faster/cheaper/awesomer option.

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  • How to learn flex?

    - by Zenzen
    So I'm starting an internship as a Flex developer in ~2weeks thanks to a friend of mine. The thing is I know squat about Flex - it is an internship after all so I'm supposed to learn there, but nonetheless I want to have some basic understanding of Flex before I start (eventually I want to become a JEE/Flex dev). So my question is simple, which book(s) would you recommend me to start with? Are there any "must have" books, like let's say "Thinking in C++" for C++ etc.? I already heard about a few video tutorials and I will surely check them out but I'd also want to get some decent books.

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  • Best Practice Guide: Swing

    - by wishi_
    Hi! Does anybody know Swing related GUI guidelines - specifically on how to design Swing apps and which components I should use? I'm not looking for an official standard, but pragmatic tips I can use to set a good standard for my projects. I haven't used too much of Swing by myself. Surely clicking a GUI with a GUI designer isn't a big deal. However I'd like to get some insights from people who have experience with Swing and know what to avoid. Swing lately (in Java 6- 10) got decent changes. So there isn't too much specific standardization out there currently.

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  • ASP.NET: How to initialize when *user control* is initially loaded

    - by kendor
    I have an ASP.NET user control that I'm embedding in another user control. This works fine. I need to know the best logic/method for detecting when the control is loaded. In other words, I have some display initialization logic that needs to run when the control is initially displayed. Surely there is a pattern for this. The typical method is to put (!IsPostBack) logic in the Page_Load method of the control. This works great until you end up with a state when the Parent page has already posted back many times. My user control gets added to the page but its display does not intialize properly. I'm hoping to find a way that keeps this logic inside the control, versus various hacking around in the codebehind of the parent page.

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  • What was the most surprising failure of your 'Engineer's intuition'?

    - by Bubba88
    Hi! This may seem as an open-ended question but I'll surely accept the most impressive and upvoted answer ;) Basically, I could describe my own case - I just fail 5 times a day with my intuition cause very frequently I can be just not up-to-the-speed with my requirements/manager/team/etc. and I just have to make code quickly - that's why proper formalization in many cases stands aside. I want to gather some experience of yours - what was the most epic failure when you did rely on you implicit reasoning/intuitive knowledge/immediate perception etc. of course everything you describe should be related to programming/computers. It's mostly just to measure the danger of using that 'it's obvious..' words. I've made it com. wiki to be properly transformed after gathering enough views count. Thank you!

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  • How do I identify an OpenID provider as requiring Directed Identity?

    - by Skrat
    I am trying to extend the LightOpenID PHP library to "discover" that an identity provider requires Directed Identity. This should be easy as the library is beautifully well written and wonderfully clean but I don't know how to identify these types of providers. A couple things I've tried: I looked through the OpenID specs on the subject but came up empty handed. Looked through the PHP OpenID library but couldn't figure out how this info was gathered during the discovery. Dumped all the data (headers and content) that came from the servers by injecting some code in LightOpenID but didn't see anything helpful. Searched Google and Stackoverflow, naturally. How do providers identify themselves as requiring "Directed Identity" authentication? Surely there is a carefully defined specification for this... somewhere. Anyone know where I can find more on this?

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  • Developer Curriculum Vitae - "Experience"

    - by Neil Barnwell
    I've been involved in some interviews at work recently, and having seen a few CVs, I've been thinking of my own. I wonder how I might rate my proficiency at the various technologies I've worked with on some sort of simple scale: Beginner, Intermediate, Expert. I've been doing C# for a few years now, but I'd hesitate to call myself "expert" particularly (partly because surely I haven't been doing it long enough, and partly because I can't bring myself to be so bold as to say I'm expert at anything). I think I probably was expert at VB back when I got into programming, but any VB skills I had will have deteriorated by now. Of course I wouldn't even bother listing things on my CV that I'd consider myself to be "beginner" at, I'd just add them to the "other tech" category, but I'd be interested to hear tips on helping me decide.

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  • Outlook Macro not executing

    - by Tim
    Hello all, we are using an an outlook macro for incoming emails to unzip the attachments, log them in sql server and copy them to a special working folder where a windows service processes them. The problems are: the user must be logged in at the server otherwise the macro wont run. I think there is no workaround for this. whenever a modal dialog pops up in outlook and waits for user input, the macro wont execute either (f.e. AutoArchive) I have stopped AutoArchiving all x-days in the options. Because its a productive environment, are there other possible windows preventing the macro to execute, which i must disable now? Our outlook-macro solution surely is not the best because of above problems. Are there better alternatives to read emails, unzip attachments and move them to a working folder? My language is VB.Net and server OS is windows 2008. Regards, Tim

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  • Code completion in NetBeans' python plugin does not work properly

    - by T.K.
    I am asking on StackOverflow because surely I am doing something completely silly and I hope S.O. might provide me with a quick answer. I've installed the latest stable Python-plugin for NetBeans. It works great, and I tested code completion with various packages such as sys, os and so on. It works beautifully. However, it does not seem to pick up the code completion for the code in my own project. I created a package called mypackage (it has _init_.py as well), and in it I have a module called mymodule.py. Inside mymodule I've put a class called MyClass, complete with doc-strings and all. Please refer to this screenshot to describe what happens in code-completion: As you see, it's suggesting irrelevant things, as opposed to just MyClass. (Note that if I execute mymodule.MyClass() it works 100%, it's just that I would really like code completion on my own code) Hope I'm just doing something silly here... Any ideas?

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  • Draw a textured triangle (patch) in Matlab

    - by Petter
    I have a triangle in (u,v) coordinates in an image. I would like to draw this triangle at 3D coordinates (X,Y,Z) texture-mapped with the triangle in the image. Here, u,v,X,Y,Z are all vectors with three elements representing the three corners of the triangle. I have a very ugly, slow and insatisfactory solution in which I (1) extract a rectangular part of the image, (2) transform it to 3D space with the transformation defined by the three points, (3) draw it with surface, and (4) finally masking out everything that is not part of the triangle with AlphaData. Surely there must be an easier way of doing this?

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  • pyplot: really slow creating heatmaps

    - by cvondrick
    I have a loop that executes the body about 200 times. In each loop iteration, it does a sophisticated calculation, and then as debugging, I wish to produce a heatmap of a NxM matrix. But, generating this heatmap is unbearably slow and significantly slow downs an already slow algorithm. My code is along the lines: import numpy import matplotlib.pyplot as plt for i in range(200): matrix = complex_calculation() plt.set_cmap("gray") plt.imshow(matrix) plt.savefig("frame{0}.png".format(i)) The matrix, from numpy, is not huge --- 300 x 600 of doubles. Even if I do not save the figure and instead update an on-screen plot, it's even slower. Surely I must be abusing pyplot. (Matlab can do this, no problem.) How do I speed this up?

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  • What is the best euphemism for a non-developer?

    - by Edward Tanguay
    I'm writing a description for a piece of software that targets the user who is "not technically minded", i.e. a person who uses "browser/office/email" and has a low tolerance for anything technical, he just "wants it to work" without being involved in any of the technical details. What is the best non-disparaging term you have seen to describe this kind of user? non-technical user low-tech user office user normal user technically challenged user non-developer computer joe Surely there is some official, politically-correct retronym for this kind of user that the press and software marketing use.

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  • .net 4 Chart Control - Hide labels in pie chart

    - by Ricardo Deano
    Hello all. Am I going mad/blind? Probably a combination of the two. How does one go about removing the data labels from a pie chart with the new chart control in .net 4? I can get these to display as tooltips absolutely fine, but ultiamtely I'd like the labels not to be present as it looks rather busy. I've searched previous answers and seen code behind resolutions but surely there must be some sort of code infront option to turn these labels off? Apologies for being thick/blind.

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  • ado.net slow updating large tables

    - by brett
    The problem: 100,000+ name & address records in an access table (2003). Need to iterate through the table & update detail with the output from a 3rd party dll. I currently use ado, and it works at an acceptable speed (less than 5 minutes on a network share). We will soon need to update to access 2007 and its 'non jet' accdb format to maintain compatability with clients. I've tried using ado.net datsets, but updating the records takes hours! We process 5-10 of these tables per day - so this cannot be a solution. Any ideas on the fastest way to update individual records using ado.net? Surely we didn't take such a hugh backward step with ado.net? Any help would be appreciated.

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  • Employing elegance in order to evade importing elephants: a case of excessive dll Imports

    - by user994179
    I am writing C# code that interfaces to a legacy (Feb 2012) C program, using DllImport. It works fine, but I need to call more than 30 different functions, turning my normally impeccable, exquisite code into something of near-elephantine proportions. Surely there must be a way around this? [Warning: those with weak stomachs may want to avert their eyes from what follows]: [DllImport("C:\\Users\\mitt\\Documents\\Visual Studio 2010\\Projects\\mrSolution\\mr\\x64\\Debug\\mrDll.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] public static extern bool mrEngine_initialize( [In, Out, MarshalAs(UnmanagedType.LPStruct)] PLOT_SPEC PlotSpec); [DllImport("C:\\Users\\mitt\\Documents\\Visual Studio 2010\\Projects\\mrSolution\\mr\\x64\\Debug\\mrDll.dll", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] public static extern bool mrEngine_getDataPoint( [In, Out, MarshalAs(UnmanagedType.LPStruct)] PLOT_SPEC PlotSpec);

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  • Index, assignment and increment in one statement behaves differently in C++ and C#. Why?

    - by Ivan Zlatanov
    Why is this example of code behaving differently in c++ and C#. [C++ Example] int arr[2]; int index = 0; arr[index] = ++index; The result of which will be arr[1] = 1; [C# Example] int[] arr = new int[2]; int index = 0; arr[index] = ++index; The result of which will be arr[0] = 1; I find this very strange. Surely there must be some rationale for both languages to implement it differently? I wonder what would C++/CLI output?

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  • Objective-C convention to prevent "local declaration hides instance variable" warning

    - by Nippysaurus
    Is there a common convention for dealing with these scenarios? The following code is what I am using .. -(id) initWithVariableName: (NSString*)variableName withComparisonValue:(NSString*)comparisonValue { self.mustExist = NO; self.reverseCondition = NO; self.regularExpression = NO; self.variableName = variableName; self.comparisonValue = comparisonValue; return self; } But I am getting "Local declaration of 'variableName' hides instance variable" and the same for "comparisonValue". The function signature seems logical to me, but surely there must be a more "acceptable" standard which will still make sense and be accurate but not generate annoying warnings?

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  • For programming content, what simple-to-use-and-setup PHP based blog are the preferred ones?

    - by Johann Gerell
    I've since long wanted a place I can toss my programming related nuggets at. Every day I feel I solve something that I'll surely hit again in a not so distant future, but by then I most certainly will have forgotten about the previous solution I came up with. So I need to blog it down, quick and dirty, for my own documentation and memory's sake. Must be easy to set up and use. Must handle code syntax and highlighting gracefully for a number of languages, but mainly C# and C++. Must be PHP-based, because that's what my host supplies. I know and have used WordPress (not for code, though), but is it really what I want or need?

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  • Rolling back database changes

    - by justin
    Hi, I work in team which uses Work flow management tool. I was presented with a challenge where the user should be able to roll back the changes made anytime during the flow to a certain point in the past. Surely the toll can handle it but the additional database calls that may have made during these activities have to be manually rolled back. the challenge is that there are multiple parallel paths and there different permutations of external database calls. So is there a frame work or a way to keep track of these DB calls and rollback them?. thank you, Justin

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  • Trouble getting Flash socket policy file to work.

    - by Alex
    Basically I'm using Flash to connect to a Java server. Despite my Java application replying to the , in the Flash debug log it lists (not sure about the order as there are lots): * Security Sandbox Violation * Connection to 192.168.1.86:4049 halted - not permitted from http://127.0.0.1:8888/Current/wander.swf Warning: Timeout on xmlsocket://192.168.1.86:4049 (at 3 seconds) while waiting for socket policy file. This should not cause any problems, but see http://www.adobe.com/go/strict_policy_files for an explanation. Error: Request for resource at xmlsocket://192.168.1.86:4049 by requestor from http://127.0.0.1:8888/Current/wander.swf is denied due to lack of policy file permissions. What I don't understand is, the server (port 4049) receives the request, outputs the policy file and then closes the connection, surely it shouldn't time out? The policy file I'm using is: <?xml version="1.0"?> <cross-domain-policy><allow-access-from domain="*" to-ports="*" /> </cross-domain-policy>

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  • Useful ways for multilanguage navigation and static content on your site?

    - by vitto
    Hi, I have a big site running under Apache and PHP and in few mounths I should consider to add some different language version of it, but I'm not sure about the right way (or ways). My problem it isn't the user data, because I can use db tables with different languages (en, de, it, etc.) so I want concentrate my answer on navigation and static content. For now I can't use gettext because I don't have a dedicated server and I can't reboot it every time I want, but surely will be a future choice. So my main problems are these: In the site, I have classical XHTML elements like the menus, lists, div and various static texts in various pages (should be perferct for gettext, but I need a alternative) The other part of the sites has XHTML elements which are dynamically created via AJAX and jQuery, and here I haven't any idea of what can I do... So does exists some example I can see in some link to solve it (or some useful tecnique)?

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  • iPhoneOS SDK - Remove Corner Rounding from views (iPad problem)

    - by norskben
    Hi Guys This might be a little bit picky, but in the iPad SplitViewController setup, there are 2 views. Each of the views has a very small black corner rounding. (This is probably the same with iPhone apps too). This rounding is visible in the image below. What I would like to do is remove the black rounding, so the UI doesnt get these two little bumps along the bottom. Has anyone done this, or know how to? -Its surely possible. Hopefully some one has seen this before. Thanks Image Link Mirror

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  • PHP + GD: imagetruecolortopalette not keeping transparency

    - by AlexMax
    I am using GD to output an image that is a truecolor+alpha channel PNG file using imagepng just fine. However, I would like to have the ability to also output an ie6-compatible 256-color PNG as well. According to the official documentation for imagetruecolortopalette: The code has been modified to preserve as much alpha channel information as possible in the resulting palette, in addition to preserving colors as well as possible. However, I am finding that the results of this function do not properly preserve any transparency at all. I used this firefox image with text superimposed on top of it as a test, and all the function did was give me a white background and a weird dark blue border. I know that I can't hope to preserve the full alpha channel, but surely this function would at least pick up on the transparent background. Is there something I'm missing? Are there any alternative approaches that I can take?

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