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• How do you load and save content from a Silverlight 4 RichTextBox control?

  - by AnthonyWJones

  I've been reviewing the features of the RichTextBox control in Silverlight 4. What I've yet to find is any examples of Loading and Saving content in the RichTextBox. Anyone come across any or can shed some light on it? The control has a BlocksCollection in which I guess one could use the XamlReader to load a bunch of markup assuming that markup has a single top level node of type Block. Then add that block to the Blocks collection. Seems a shame that the RichTextBox bothers to have a "collection" in this case, why not simply a top-level Block item? Never-the-less that still leaves saving the content of a RichTextBox, I have no idea where to begin with that one? I'm sure I must be missing the obvious here but unless loading and saving data in to and from RichTextBox is at least possible if not easy I can't see how we can actually put it to use. Edit Thanks to DaveB's answer I found discussion of something called the DocumentPersister. However no reference to this class can be found in the MSDN documentation nor can I find it in the installed dlls via object browser search. Anyone, anyone at all?

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• How to draw an Arc in OpenGL

  - by rpgFANATIC

  While making a little Pong game in C++ OpenGL, I decided it'd be fun to create arcs (semi-circles) when stuff bounces. I decided to skip Bezier curves for the moment and just go with straight algebra, but I didn't get far. My algebra follows a simple quadratic function (y = +- sqrt(mx+c)). This little excerpt is just an example I've yet to fully parameterize, I just wanted to see how it would look. When I draw this, however, it gives me a straight vertical line where the line's tangent line approaches -1.0 / 1.0. Is this a limitation of the GL_LINE_STRIP style or is there an easier way to draw semi-circles / arcs? Or did I just completely miss something obvious? void Ball::drawBounce() { float piecesToDraw = 100.0f; float arcWidth = 10.0f; float arcAngle = 4.0f; glBegin(GL_LINE_STRIP); for (float i = 0.0f; i < piecesToDraw; i += 1.0f) // Positive Half { float currentX = (i / piecesToDraw) * arcWidth; glVertex2f(currentX, sqrtf((-currentX * arcAngle)+ arcWidth)); } for (float j = piecesToDraw; j > 0.0f; j -= 1.0f) // Negative half (go backwards in X direction now) { float currentX = (j / piecesToDraw) * arcWidth; glVertex2f(currentX, -sqrtf((-currentX * arcAngle) + arcWidth)); } glEnd(); } Thanks in advance.

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• Customizing Django form widgets? - Django

  - by RadiantHex

  Hi folks, I'm having a little problem here! I have discovered the following as being the globally accepted method for customizing Django admin field. from django import forms from django.utils.safestring import mark_safe class AdminImageWidget(forms.FileInput): """ A ImageField Widget for admin that shows a thumbnail. """ def __init__(self, attrs={}): super(AdminImageWidget, self).__init__(attrs) def render(self, name, value, attrs=None): output = [] if value and hasattr(value, "url"): output.append(('<a target="_blank" href="%s">' '<img src="%s" style="height: 28px;" /></a> ' % (value.url, value.url))) output.append(super(AdminImageWidget, self).render(name, value, attrs)) return mark_safe(u''.join(output)) I need to have access to other field of the model in order to decide how to display the field! For example: If I am keeping track of a value, let us call it "sales". If I wish to customize how sales is displayed depending on another field, let us call it "conversion rate". I have no obvious way of accessing the conversion rate field when overriding the sales widget! Any ideas to work around this would be highly appreciated! Thanks :)

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• Using QTDesigner with PyQT and Python 2.6

  - by PyNewbie27

  Hi. I'm fairly new to Python and trying to work with the latest versions of QTDesigner, PyQT 4.7 and QT4.7 (I downloaded the whole package from PyQT4.7 website). I can't figure out how to make QTDesigner integrate closely with Python: ie. If I select "Form" View Code in QTDesigners menu, it errors saying "Unable to launch C:/Python26/Lib/site-packages/PyQT4/bin\uic." If I look in that directory there is a pyuic.py but not "uic". From searching online it seems this doesn't exist because it's expecting a C++ install instead of the python version. Is there anyway to make QTDesigner use/call pyuic.py to generate the code, then open an IDE or text editor of my choice to show me the PYTHON code generated by the QTDesigner-PyUIC chain? I'd like Designer to integrate closely with python, so I can make custom slots/signals in Designer while designing, then tweak the python code directly in my IDE later. If it is not possible to code directly inside QTDesigner using python, does that mean I have to hand code my programs entire UI directly in my PythonIDE? Using Designer directly would seemingly be nearly very very nice for a newbie such as myself, since I can see what properties each widget has and visually edit them while still learning the QT syntax without constantly having to use web resources to see what properties each widget should have and helps with boilerplate code generation, and what their defaults are, etc. I've googled and nobody seems to be using QTDesigner and Python in this manner together. It seems most are either handcoding all the QT code in their Python IDE of choice, or have found an obvious/easy method of doing what I want, therefore not really producing up to date tutorials on making this work together. Please enlighten me if you can. Thanks in advance for your time. Please include any suggestions you might have to a newbie trying to use Python with QT and QTDesigner. Thank you.

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• How can I beta test web Perl modules under Apache/mod_perl on production web server?

  - by DVK

  We have a setup where most code, before being promoted to full production, is deployed in BETA mode - meaning, it runs in full production environment (using production database - usually production data; and production web server). We call that stage BETA testing. One of the main requirements is that BETA code promotion to production must be a simple "cp" command from beta to production directory - no code/filename changes. For non-web Perl code, achieving seamless BETA test is quite doable (see details here): Perl programs live in a standard location under production root (/usr/code/scripts) with production perl modules living under the same root (/usr/code/lib/perl) The BETA code has 100% same code paths except under beta root (/usr/code/beta/) A special module manipulates @INC of any script based on whether the script was called from /usr/code/scripts or /usr/code/test/scripts, to include beta libraries for beta scripts. This setup works fine up till we need to beta test our web Perl code (the setup is EmbPerl and Apache/mod_perl). The hang-up is as follows: if both a production Perl module and BETA Perl module have the same name (e.g. /usr/code/lib/perl/MyLib1.pm and /usr/code/beta/lib/perl/MyLib1.pm), then mod_perl will only be able to load ONE of these modules into memory - and there's no way we are aware of for a particular web page to affect which version of the module is currently loaded due to concurrency issues. Leaving aside the obvious non-programming solution (get a bloody BETA web server) which for political/organizational reasons is not feasible, is there any way we can somehow hack around this problem in either Perl or mod_perl? I played around with various approaches to unloading Perl modules that %INC has listed, but the problem remains that another user might load a beta page at just the right (or rather wrong) moment and have the beta module loaded which will be used for my production page.

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• Telerik RADGrid - linq and updating

  - by Dave

  Hi Telerik's RADGrid, basing on their example on http://demos.telerik.com/aspnet-ajax/grid/examples/dataediting/programaticlinqupdates/defaultcs.aspx Problem: I can insert and delete, however updating doesn't work. No error trapped. Data just doesn't change. From the code below it looks like Telerik Grid is doing some kung-fu behind the scenes to wire things up. I can't see the db receiving any update statements. Question: anything obvious I'm missing? protected void RadGrid1_UpdateCommand(object source, GridCommandEventArgs e) { var editableItem = ((GridEditableItem) e.Item); var raceId = (Guid) editableItem.GetDataKeyValue("RaceID"); //retrive entity form the Db var race = DbContext.races.Where(n => n.raceid == raceId).FirstOrDefault(); if (race != null) { //update entity's state editableItem.UpdateValues(race); try { //submit chanages to Db DbContext.SubmitChanges(); } catch (Exception f) { ShowErrorMessage(f); } } } Think I may have to go back to their example.. get their db.. and attack from that point of view. Cheers!

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• Why isn't uploadify and asp.net mvc 2 playing nice for me?

  - by Paperino

  First of all, I've checked out all the SO threads, and googled my brains out. I must be missing something obvious. I'd really appreciate some help! This is what I've got. UploadController.cs using System.Web; using System.Web.Mvc; namespace NIMDocs.Controllers { public class UploadController : Controller { public ActionResult Index() { return View(); } public string Procssed(HttpPostedFileBase FileData) { // DO STUFF return "DUHR I AM SMART"; } } } Index for Upload <%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>ITS A TITLE </title> <script src="../../Content/jqueryPlugins/uploadify/jquery-1.3.2.min.js" type="text/javascript"></script> <script src="../../Content/jqueryPlugins/uploadify/swfobject.js" type="text/javascript"></script> <script src="../../Content/jqueryPlugins/uploadify/jquery.uploadify.v2.1.0.min.js" type="text/javascript"></script> <script type="text/javascript"> $(document).ready(function () { $('#uploadify').fileUpload({ 'uploader': '../../Content/jqueryPlugins/uploadify/uploadify.swf', 'script': '/Upload/Processed', 'folder': '/uploads', 'multi': 'true', 'buttonText': 'Browse', 'displayData': 'speed', 'simUploadLimit': 2, 'cancelImg': '/Content/Images/cancel.png' }); }); </script> </head> <body> <input type="file" name="uploadify" id="uploadify" /> <p><a href="javascript:jQuery('#uploadify').uploadifyClearQueue()">Cancel All Uploads</a></p> </body> </html> What am I missing here? I've tried just about every path permutation for uploadify's "uploader" option. Absolute path, '/' prefixed, etc.

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• ASP.NET MVC search box: use modal popup or inline div or redirect to another page?

  - by JK

  I have a view with a textbox and a search button, eg CustomerTextBox and CustomerSearchButton. The list of customers is too long to display in a dropdown, and there has to be advanced search functions anyway. What is the best practice in MVC to handle this case? When the user clicks on the search button, should it: A. Load another view into a modal popup (eg /customers/search)? How would you do this in MVC, just set popupWindow.location.href = '/customers/search'? How would you return the value to the main view? B. Have the search form in a hidden div that expands when the search button is clicked? How would be done? a partial view maybe? C. Redirect the user to a search page by means of RedirectTo("/customers/search")? How would you return the value to the main class? I've only been doing MVC for 3 days so thanks to those who answer my questions that might have quite obvious answers that I cant see yet. :)

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• VS2010 - How to automatically stop compile on first compile error

  - by Ben Robbins

  {rant}First I'd like to say that this IS NOT A DUPLICATE. I've asked this question previously but it got closed as a duplicate when it isn't. This question is SPECIFIC to VS 2010 and the answers to the so-called duplicate work in VS 2008 but not in VS 2010 (at least not for me or anyone I know). So before you go closing something as a duplicate how about you read the question carefully and try the answer for yourself and see if it actually works. Apologies for the rant but there is no obvious way to contact the SO police that closed the issue or get it reopened. {/rant} At work we have a C# solution with over 80 projects. In VS 2008 we use a macro to stop the compile as soon as a project in the solution fails to build (see this question for several options for VS 2005 & VS 2008: http://stackoverflow.com/questions/134796/how-to-automatically-stop-visual-c-build-at-first-compile-error). Is it possible to do the same in VS 2010? What we have found is that in VS 2010 the macros don't work (at least I couldn't get them to work) as it appears that the environment events don't fire in VS 2010. The default behaviour is to continue as far as possible and display a list of errors in the error window. I'm happy for it to stop either as soon as an error is encountered (file-level) or as soon as a project fails to build (project-level). Answers for VS 2010 only please. If the macros do work then a detailed explanation of how to configure them for VS 2010 would be appreciated. Thanks.

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• How to require fullscreen mode in a jQTouch application?

  - by Christopher Young

  I'm using jQTouch to develop a version of a website optimized for safari on the iphone. The jQTouch demo helpfully shows how to show an "install this" message for users not using full screen mode and hide it for those who are. When in fullscreen mode, the body should have the class "fullscreen." So you can hide the "install this" message for people who have already added your app to their home page by adding this css rule to your stylesheet: body.fullscreen #home .info { display: none; } What I'd like to do is require users to use the app in fullscreen mode only. When viewed from the regular browser, they should only see a message asking them to install the app. That message should of course be hidden otherwise. This ought to be really, really easy, so I must just be missing something obvious. I thought one way to do this would be to simply test for the class "fullscreen" on the body: if it's not there, use goTo to get to another div, or hide the other divs, or something like that. Strangely, however, this doesn't work. As a test, I've still got the original "info" message, as in the jQTouch demo, and it doesn't show up when I launch in fullscreen mode. So the body must have the fullscreen class. And yet I can't find any other trace of it: when I put this alert to test things after the document has loaded, I get nothing when launching in fullscreen mode: alert($("body").attr("class")); I also thought I might test for fullscreen mode by checking for the value of the fullScreen boolean. But this doesn't seem to work either. What am I missing? What is the best way to do this?

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• asp.net mvc, IIS 6 vs IIS7.5, and integrated windows authentication causing javascript errors?

  - by chris

  This is a very strange one. I have an asp.net MVC 1 app. Under IIS6, with no anon access - only integrated windows auth - every thing works fine. I have the following on most of my Foo pages: <% using (Html.BeginForm()) { %> Show All: <%= Html.CheckBox("showAll", new { onClick = "$(this).parent('form:first').submit();" })%> <% } %> Clicking on the checkbox causes a post, the page is reloaded, everything is good. When I look at the access logs, that's what I see, with one oddity - the js library is requested during the page first request, but not for any subsequent page requests. Log looks like: GET / 401 GET / 200 GET /Content/Site.css 304 GET /Scripts/jquery-1.3.2.min.js 401 GET /Scripts/jquery-ui-1.7.2.custom.min.js 401 GET /Scripts/jquery.tablesorter.min.js 401 GET /Scripts/jquery-1.3.2.min.js 304 GET /Scripts/jquery-ui-1.7.2.custom.min.js 304 GET /Scripts/jquery.tablesorter.min.js 304 GET /Content/Images/logo.jpg 401 GET /Content/Images/logo.jpg 304 GET /Foo 401 GET /Foo 200 POST /Foo/Delete 302 GET /Foo/List 200 POST /Foo/List 200 This corresponds to home page, click on "Foo", delete a record, click a checkbox (which causes the 2nd POST). Under IIS7.5, it sometimes fails - the click on the check box doesn't cause a postback, but there are no obvious reasons why. I've noticed under IIS7.5 that every single page request re-issues the requests for the js libraries - the first one a 401, followed by either a 200 (OK) or 304 (not modified), as opposed to the above log extract where that only happened during the 1st request. Is there any way to eliminate the 401 requests? Could a timing issue have something to do with the click being ignored? Would increasing the number of concurrent connections help? Any other ideas? I'm at a bit of a loss to explain this.

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• How to correctly calculate FPS in XNA?

  - by Tomek Tarczynski

  I wrote a component to display current FPS. The most important part of it is: public override void Update(GameTime gameTime) { elapseTime += (float)gameTime.ElapsedRealTime.TotalSeconds; frameCounter++; if (elapseTime > 1) { FPS = frameCounter; frameCounter = 0; elapseTime = 0; } base.Update(gameTime); } In most cases it works ok, but recently I had a problem. When I put following code into Update method of game strange thing starts to happen. if (threadPath == null || threadPath.ThreadState != ThreadState.Running) { ThreadStart ts = new ThreadStart(current.PathFinder.FindPaths); threadPath = new Thread(ts); threadPath.Priority = ThreadPriority.Highest; threadPath.Start(); } Main idea of this code is to run pathFinding algorithm in different thread all the time. By strange things I mean that sometimes FPS drasticly decreases, this is obvious, but displayed FPS changes more often than once a second. If I understand this code FPS can't change more often than once a second. Can someone explain me what's going on?

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• Creating a closeable tab in Mono/GTK

  - by Chumpy

  I'm trying to create new GTK Notebook tabs that contain both a name (as a Label) and a close button (as a Button with an Image) with the following code: Label headerLabel = new Label(); headerLabel.Text = "Header"; HBox headerBox = new HBox(); Button closeBtn = new Button(); Image closeImg = new Image(Stock.Close, IconSize.Menu); closeBtn.Image = closeImg; closeBtn.Relief = ReliefStyle.None; headerBox.Add(headerLabel); headerBox.Add(closeBtn); headerBox.ShowAll(); MyNotebook.AppendPage(childWidget, headerBox); This seems to work just fine; however, the button is about 1.5 - 2 times the size is needs to be, so there is a lot of extra space around the image inside the button. Having looked at remove inner border on gtk.Button I now see that the culprit is the "inner-border" style property of the GtkButton, but (being new to GTK) I can't seem to figure out how to override its value. Is there some method of doing this that I'm missing? I don't have any reservations about not using a Button/Image combination, so any more obvious suggestions are welcome. Note: I have seen the suggestion in the linked question to use an EventBox, but I was not able to add the Relief and mouseover effects to that Widget.

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• Is Rails Metal (& Rack) a good way to implement a high traffic web service api?

  - by Greg

  I am working on a very typical web application. The main component of the user experience is a widget that a site owner would install on their front page. Every time their front page loads, the widget talks to our server and displays some of the data that returns. So there are two components to this web application: the front end UI that the site owner uses to configure their widget the back end component that responds to the widget's web api call Previously we had all of this running in PHP. Now we are experimenting with Rails, which is fantastic for #1 (the front end UI). The question is how to do #2, the back serving of widget information, efficiently. Obviously this is much higher load than the front end, since it is called every time the front page loads on one of our clients' websites. I can see two obvious approaches: A. Parallel Stack: Set up a parallel stack that uses something other than rails (e.g. our old PHP-based approach) but accesses the same database as the front end B. Rails Metal: Use Rails Metal/Rack to bypass the Rails routing mechanism, but keep the api call responder within the Rails app My main question: Is Rails/Metal a reasonable approach for something like this? But also... Will the overhead of loading the Rails environment still be too heavy? Is there a way to get even closer to the metal with Rails, bypassing most of the environment? Will Rails/Metal performance approach the perf of a similar task on straight PHP (just looking for ballpark here)? And... Is there a 'C' option that would be much better than both A and B? That is, something before going to the lengths of C code compiled to binary and installed as an nginx or apache module? Thanks in advance for any insights.

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• dotnetopenid attribute extensions just not working for me!

  - by Rob Ellis

  So here's some code on the request:- IAuthenticationRequest req = openid.CreateRequest(Request.Form["openid_identifier"]); //add extention requests here req.AddExtension(new ClaimsRequest { Email = DemandLevel.Request, BirthDate = DemandLevel.Request, Country = DemandLevel.Request, FullName = DemandLevel.Request, Gender = DemandLevel.Request, Language = DemandLevel.Request, Nickname = DemandLevel.Request, PostalCode = DemandLevel.Request, TimeZone = DemandLevel.Request } ); //get the request from openid return req.RedirectingResponse.AsActionResult(); And here's some on the pickup:- //get attributes from site var sreg = response.GetExtension<ClaimsResponse>(); string sreg_email = "Unknown Email"; DateTime sreg_birthdate; string sreg_birthdateraw; Gender sreg_gender; Version sreg_version; string sreg_timezone; string sreg_nickname; string sreg_postalcode; System.Globalization.CultureInfo sreg_culture; string sreg_country; string sreg_fullname; System.Net.Mail.MailAddress sreg_mailaddress; string sreg_language; if (sreg != null) { sreg_email = sreg.Email; sreg_birthdate = sreg.BirthDate.Value; sreg_birthdateraw = sreg.BirthDateRaw; sreg_country = sreg.Country; sreg_culture = sreg.Culture; sreg_fullname = sreg.FullName; sreg_gender = sreg.Gender.Value; sreg_language = sreg.Language; sreg_mailaddress = sreg.MailAddress; sreg_nickname = sreg.Nickname; sreg_postalcode = sreg.PostalCode; sreg_timezone = sreg.TimeZone; sreg_version = sreg.Version; } But it's all coming back as null no matter which OpenId provider I use... Am I missing something obvious? Rob

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• WIX Merge Module : Trying to use $(var.Project.TargetFileName)

  - by Stephen Bailey

  I have created a simple Wix 3 Merge Module in VS 2005 ( .wxs ) <?xml version="1.0" encoding="UTF-8"?> <Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"> <Module Id="TestMergeModule" Language="1033" Version="1.0.0.0"> <Package Id="ef2a568e-a8db-4213-a211-9261c26031aa" Manufacturer="Me" InstallerVersion="200" /> <Directory Id="TARGETDIR" Name="SourceDir"> <Directory Id="MergeRedirectFolder"> <Component Id="Test_ModuleComponent" Guid="{1081C5BC-106E-4b89-B14F-FFA71B0987E1}"> <File Id="Test" Name="$(var.Project.TargetFileName)" Source="$(var.Project.TargetPath)" DiskId="1" /> </Component> </Directory> </Directory> </Module> </Wix> And I have added the project "Project" as a reference to this Merge Module, however I continue to get this error Error 7 Undefined preprocessor variable '$(var.Project.TargetFileName)'. Any suggestions, I am sure I am just missing the obvious here.

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• Easy to use AutoHotkey/AutoIT alternatives for Linux

  - by Xeddy

  Hi all, I'm looking for recommendations for an easy-to-use GUI automation/macro platform for Linux. If you're familiar with AutoHotkey or AutoIT on Windows, then you know exactly the kind of features I need, with the level of complexity. If you aren't familiar, then here's a small code snippet of how easy it is to use AHK: InputBox, varInput, Please enter some random text... Run, notepad.exe WinWaitActive, Untitled - Notepad SendInput, %varInput% SendInput, !f{Up}{Enter}{Enter} WinWaitActive, Save SendInput, SomeRandomFile{Enter} MsgBox, Your text`, %varInput% has been saved using notepad! #n::Run, notepad.exe Now the above example, although a bit pointless, is a demo of the sort of functionality and simplicity I'm looking for. Here's an explanation for those who don't speak AHK: ----Start of Explanation of Code ---- Asks user to input some text and stores it in varInput Runs notepad.exe Waits till window exists and is active Sends the contents of varInput as a series of keystrokes Sends keystrokes to go to File - Exit Waits till the "Save" window is active Sends some more keystrokes Shows a Message Box with some text and the contents of a variable Registers a hotkey, Win+N, which when pressed executes notepad.exe ----End of Explanation---- So as you can understand, the features are quite obvious: Ability to easily simulate keyboard and mouse functions, read input, process and display output, execute programs, manipulate windows, register hotkeys, etc.. all being done without requiring any #includes, unnecessary brackets, class declarations etc. In short: Simple. Now I've played around a bit with Perl and Python, but its definitely no AHK. They're great for more advanced stuff, but surely, there has to be some tool out there for easy GUI automation? PS: I've already tried running AHK with Wine but sending keystrokes and hotkeys don't work.

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• python sqlite3 won't execute a join, but sqlite3 alone will

  - by Francis Davey

  Using the sqlite3 standard library in python 2.6.4, the following query works fine on sqlite3 command line: select segmentid, node_t, start, number,title from ((segments inner join position using (segmentid)) left outer join titles using (legid, segmentid)) left outer join numbers using (start, legid, version); But If I execute it via the sqlite3 library in python I get an error: >>> conn=sqlite3.connect('data/test.db') >>> conn.execute('''select segmentid, node_t, start, number,title from ((segments inner join position using (segmentid)) left outer join titles using (legid, segmentid)) left outer join numbers using (start, legid, version)''') Traceback (most recent call last): File "<stdin>", line 1, in <module> sqlite3.OperationalError: cannot join using column start - column not present in both tables The (computed) table on the left hand side of the join appears to have the relevant column because if I check it by itself I get: >>> conn.execute('''select * from ((segments inner join position using (segmentid)) left outer join titles using (legid, segmentid)) limit 20''').description (('segmentid', None, None, None, None, None, None), ('html', None, None, None, None, None, None), ('node_t', None, None, None, None, None, None), ('legid', None, None, None, None, None, None), ('version', None, None, None, None, None, None), ('start', None, None, None, None, None, None), ('title', None, None, None, None, None, None)) My schema is: CREATE TABLE leg (legid integer primary key, t char(16), year char(16), no char(16)); CREATE TABLE numbers ( number char(16), legid integer, version integer, start integer, end integer, prev integer, prev_number char(16), next integer, next_number char(16), primary key (number, legid, version)); CREATE TABLE position ( segmentid integer, legid integer, version integer, start integer, primary key (segmentid, legid, version)); CREATE TABLE 'segments' (segmentid integer primary key, html text, node_t integer); CREATE TABLE titles (legid integer, segmentid integer, title text, primary key (legid, segmentid)); CREATE TABLE versions (legid integer, version integer, primary key (legid, version)); CREATE INDEX idx_numbers_start on numbers (legid, version, start); I am baffled as to what I am doing wrong. I have tried quitting/restarting both the python and sqlite command lines and can't see what I'm doing wrong. It may be completely obvious.

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• How to break WinDbg in an anonymous method?

  - by Richard Berg

  Title kinda says it all. The usual SOS command !bpmd doesn't do a lot of good without a name. Some ideas I had: dump every method, then use !bpmd -md when you find the corresponding MethodDesc not practical in real world usage, from what I can tell. Even if I wrote a macro to limit the dump to anonymous types/methods, there's no obvious way to tell them apart. use Reflector to dump the MSIL name doesn't help when dealing with dynamic assemblies and/or Reflection.Emit. Visual Studio's inability to read local vars inside such scenarios is the whole reason I turned to Windbg in the first place... set the breakpoint in VS, wait for it to hit, then change to Windbg using the noninvasive trick attempting to detach from VS causes it to hang (along with the app). I think this is due to the fact that the managed debugger is a "soft" debugger via thread injection instead of a standard "hard" debugger. Or maybe it's just a VS bug specific to Silverlight (would hardly be the first I've encountered). set a breakpoint on some other location known to call into the anonymous method, then single-step your way in my backup plan, though I'd rather not resort to it if this Q&A reveals a better way

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• Populating Models from other Models in Django?

  - by JT

  This is somewhat related to the question posed in this question but I'm trying to do this with an abstract base class. For the purposes of this example lets use these models: class Comic(models.Model): name = models.CharField(max_length=20) desc = models.CharField(max_length=100) volume = models.IntegerField() ... <50 other things that make up a Comic> class Meta: abstract = True class InkedComic(Comic): lines = models.IntegerField() class ColoredComic(Comic): colored = models.BooleanField(default=False) In the view lets say we get a reference to an InkedComic id since the tracer, err I mean, inker is done drawing the lines and it's time to add color. Once the view has added all the color we want to save a ColoredComic to the db. Obviously we could do inked = InkedComic.object.get(pk=ink_id) colored = ColoredComic() colored.name = inked.name etc, etc. But really it'd be nice to do: colored = ColoredComic(inked_comic=inked) colored.colored = True colored.save() I tried to do class ColoredComic(Comic): colored = models.BooleanField(default=False) def __init__(self, inked_comic = False, *args, **kwargs): super(ColoredComic, self).__init__(*args, **kwargs) if inked_comic: self.__dict__.update(inked_comic.__dict__) self.__dict__.update({'id': None}) # Remove pk field value but it turns out the ColoredComic.objects.get(pk=1) call sticks the pk into the inked_comic keyword, which is obviously not intended. (and actually results in a int does not have a dict exception) My brain is fried at this point, am I missing something obvious, or is there a better way to do this?

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• ListView + MultipleSelect + MVVM = ?

  - by Dave

  If I were to say "the heck with it!", I could just give my ListView with SelectionMode="Multiple" a name, and be able to get all of the selected items very easily. But I'm trying to stick to MVVM as much as possible, and I want to somehow databind to an ObservableCollection that holds the value from the Name column for each selected item. How in the world do you do this? Single selection is simple, but the multi selection solution is not obvious to me with my current WPF / MVVM knowledge. I read this question on SO, and while it does give me some good insight, I don't know how to add the necessary binding to a row, because I am using a ListView with a GridView as its View, not a ListBox. Here's what my XAML basically looks like: <ListView DockPanel.Dock="Top" ItemsSource="{Binding ClientPreview}" SelectionMode="Multiple"> <ListView.View> <GridView AllowsColumnReorder="False"> <GridViewColumn Header="Name"> <GridViewColumn.CellTemplate> <DataTemplate> <TextBlock Text="{Binding Path=Name}" /> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> <GridViewColumn Header="Address"> <GridViewColumn.CellTemplate> <DataTemplate> <TextBlock Text="{Binding Path=Address}" /> </DataTemplate> </GridViewColumn.CellTemplate> </GridViewColumn> </GridView> </ListView.View> </ListView> It sounds like the right thing to do is to databind each row's IsSelected property to each object stored in the ObservableCollection I'm databinding to. I just haven't figured out how to do this.

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• jQuery select change/click problem - change doesn't work in IE, click doesn't work in Chrome

  - by dan727

  As the title says, I have a problem with binding to a change in a dropdown select list - it seems that "change" doesn't work with IE(7 or 8), so when I try the alternative and use a "click" event, it works in IE but doesn't work in Chrome! Am I missing something obvious here? Here's my code: //event handler for showing hidden form elements (also ensures only relevant hidden els shown) //IE needs click event instead of change $('.select_change').live("change", function(){ //check if value is other if ($(this).val() == 'other') $(this).parent().find(".hidden").show(); //if user changes select value from other then hide input if ($(this).val() != 'other') $(this).parent().find(".hidden").hide(); return false; }); The dropdown HTML is as follows: <select id="title" name="title" class="validate[required,funcCall[validateNotDefault]] select_change" > <option value="default" selected="selected">Please choose from options</option> <option value="yellow">Yellow</option> <option value="black">Black</option> <option value="chocoloate">Chocolate</option> <option value="other">Other</option> </select>

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• Activity Indicator display in Table View whilst row data is being fetched

  - by Tofrizer

  Hi All, I am navigating from tableview1.row to a tableview2 which has a LOT of rows being fetched. Given the load time is around 3 seconds, I want the navigation to slide into tableview2 as soon as the tableview1.row is selected, and then display a UIActivityIndicatorView above tableview2 whilst the data is fetched and then rendered in its underlying table view. Note, tableview2 is actually a subview of the parent UIView (as opposed to the parent being a UITableView). I've seen this post: http://stackoverflow.com/questions/2153653/activity-indicator-shold-be-displayed-when-navigating-from-uitableview1-to-uitabl ... which gives instructions to add the activity indicator start and stopAnimating calls around the data fetch into viewDidLoad of tableview2. Thing is, I'm not sure how the above solution could work as viewDidLoad runs and completes before tableview2 visibly slides into view. Separately, I also tried adding an activity indicator over tableview2 in IB and added the IBOutlet indicator's start/stop animating code into viewDidAppear. What happens is the data fetch runs and I can see the indicator spinning but at the end of the fetch, the table view is empty. Seems like viewDidAppear is too late to add data to the table view as cellForRowAtIndexPath etc has already fired. Can anyone please suggest any pointers? I could very well be missing something obvious here (its nearly 5am where I am and think my brain is mush). Should I re-trigger cellForRowAtIndexPath etc from viewDidAppear? Is the issue that my table view is a subview and not the parent view? Thanks

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• Xcode 3.2: Build & Analyze never finds any issues

  - by GamingHorror

  I've used the Clang Static Analyzer from the command line before. I wanted to try Xcode's built-in version via Build & Analyze. I never get any negative results even though i specially prepared my code with very obvious issues Clang was always able to point out: // over-releasing an object: [label release]; [label release]; // uninitialized vars, allocating but not freeing an object NSString* str; int number; CCLabel* newLabel = [[CCLabel alloc] initWithString:str fontName:str fontSize:number]; [newLabel setPosition:CGPointZero]; The result is always the same: a green checkbox, no issues. I read that C++ code can cause issues. I'm running this with cocos2d that includes box2d. Could this be a cause? Did anyone get results from Build & Analyze with the cocos2d engine? What else could it be? I also tried enabling the Static Analyzer Build Settings and then Build but the result was the same. I have restarted Xcode, cleaned all targets and emptied Xcode caches to no avail.

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• A layout for maven project with a patched dependency

  - by zamza

  Suppose, I have an opensource project that depends on some library, that must be patched in order to fix some issues. How do I do that? My ideas are: Have that library sources set up as a module, keep them in my vcs. Pros: simple. Cons: some third party sources in my repo, might slow down build process, hard to find a patched place (though can be fixed in README) Have a module, like in 1, but keep patched source files only, compile them with orignal library jar in classpath and somehow replace *.class files in library jar on build. Pros: builds faster, easy to find patched places. Cons: hard to configure, that jar hackery is non-obvious (library jar in repository and in my project assembly would be different) Keep patched *.class files in main/resources, and replace on packaging like in 2). Pros: almost none. Cons: binaries in vcs, hard to recompile a patched class as patch compilation is not automated. One nice solution is to create a distinct project with patched library sources, and deploy it on local/enterprise repository with -patched qualifier. But that would not fit for an opensourced project that is meant to be easily buildable by anyone who checks out its sources. Or should I just say "and also, before you build my project, please check out that stuff and run mvn install".

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