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  • POST from edit/create partial views loaded into Twitter Bootstrap modal

    - by mare
    I'm struggling with AJAX POST from the form that was loaded into Twitter Bootstrap modal dialog. Partial view form goes like this: @using (Html.BeginForm()) { // fields // ... // submit <input type="submit" value="@ButtonsRes.button_save" /> } Now this is being used in non AJAX editing with classic postbacks. Is it possible to use the same partial for AJAX functionality? Or should I abstract away the inputs into it's own partial view? Like this: @using (Ajax.BeginForm()) { @Html.Partial("~/Views/Shared/ImageEditInputs.cshtml") // but what to do with this one then? <input type="submit" value="@ButtonsRes.button_save" /> } I know how to load this into Bootstrap modal but few changes should be done on the fly: the buttons in Bootstrap modal should be placed in a special container (the modal footer), the AJAX POST should be done when clicking Save which would first, validate the form and keep the modal opened if not valid (display the errors of course) second, post and close the modal if everything went fine in the view that opened the modal, display some feedback information at the top that save was succesful. I'm mostly struggling where to put what JS code. So far I have this within the List view, which wires up the modals: $(document).ready(function () { $('.openModalDialog').click(function (event) { event.preventDefault(); var url = $(this).attr('href'); $.get(url, function (data) { $('#modalContent').html(data); $('#modal').modal('show'); }); }); }); The above code, however, doesn't take into the account the special Bootstrap modal content placeholder (header, content, footer). Is it possible to achieve what I want without having multiple partial views with the same inputs but different @using and without having to do hacks with moving the Submit button around?

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  • Integrating Google Analytics into GWT application

    - by Domchi
    This should be totally simple but I can't get it working no matter what I try. I'm trying to use Google Analytics with GWT application. From what I understood, there are two way to do it: First is synchronous, by inserting tracking code at the end of <head> section HTML page and then calling this method: public static native void recordAnalyticsHit(String pageName) /*-{ pageTracker._trackPageview(pageName); }-*/; Second is asynchronous, by inserting tracking code just after <body> tag and then calling this method: public static native void recordAnalyticsHit(String pageName) /*-{ _gaq.push(['_trackPageview(' + pageName + ')']); }-*/; When running each of those methods, however, I get this exceptions in hosted mode: [ERROR] [myproject] Uncaught exception escaped com.google.gwt.core.client.JavaScriptException: (ReferenceError): pageTracker is not defined [ERROR] [myproject] Uncaught exception escaped com.google.gwt.core.client.JavaScriptException: (ReferenceError): _gaq is not defined When observing site in Firebug, I see that ga.js gets loaded, but that's about it. Did anyone get Analytics working with GWT? Also, does _gaq accept page name as trackPageview parameter, since all the examples I've seen use this call: _gaq.push(['_trackPageview()']); (Of course, that also doesn't work for me.)

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  • Question about using ServiceModelEx's "WCFLogbook" from "Programming WCF Services" book

    - by Bill
    I am attempting to compile/run a sample WCF application from Juval Lowy's website (author of Programming WCF Services & founder of IDesign). Of course the example application utilizes Juval's ServiceModelEx library and logs faults/errors to a "WCFLogbook" database. Unfortunately, when the sample app faults, I get the following new error: "Cannot open database "WCFLogbook" requested by the login. The login failed. Login failed for user 'Bill-PC\Bill'." I suspect the error occurs as a result of not finding the "WCFLogbook" database, which I believe still needs to be created. Included in the library source directory, there are two files -WCFLogbookDataSet.xsd and WCFLogbook.sql; which neither seem to be referenced anywhere within the library code. This leads me to beleive that the sql and xsd files are there to be used to create the database somehow in SQL. Could someone please advise me if I am going in the correct direction here and if whether these files can be used to create the database (and if so, how)?

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  • Django - The included urlconf doesn't have any patterns in it

    - by unsorted
    My website, which was working before, suddenly started breaking with the error "ImproperlyConfigured at / The included urlconf resume.urls doesn't have any patterns in it" The project base is called resume. In settings.py I have set ROOT_URLCONF = 'resume.urls' Here's my resume.urls, which sits in the project root directory. from django.conf.urls.defaults import * # Uncomment the next two lines to enable the admin: from django.contrib import admin admin.autodiscover() urlpatterns = patterns('', # Example: # (r'^resume/', include('resume.foo.urls')), # Uncomment the admin/doc line below and add 'django.contrib.admindocs' # to INSTALLED_APPS to enable admin documentation: (r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: (r'^admin/', include(admin.site.urls)), (r'^accounts/login/$', 'django.contrib.auth.views.login'), #(r'^employer/', include(students.urls)), (r'^ajax/', include('urls.ajax')), (r'^student/', include('students.urls')), (r'^club/(?P<object_id>\d+)/$', 'resume.students.views.club_detail'), (r'^company/(?P<object_id>\d+)/$', 'resume.students.views.company_detail'), (r'^program/(?P<object_id>\d+)/$', 'resume.students.views.program_detail'), (r'^course/(?P<object_id>\d+)/$', 'resume.students.views.course_detail'), (r'^career/(?P<object_id>\d+)/$', 'resume.students.views.career_detail'), (r'^site_media/(?P<path>.*)$', 'django.views.static.serve', {'document_root': 'C:/code/django/resume/media'}), ) Anyone know what's wrong? This is driving me crazy. Thanks,

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  • How to use Excel VBA to extract Memo field from Access Database?

    - by the.jxc
    I have an Excel spreadsheet. I am connecting to an Access database via ODBC. Something along then lines of: Set dbEng = CreateObject("DAO.DBEngine.40") Set oWspc = dbEng.CreateWorkspace("ODBCWspc", "", "", dbUseODBC) Set oConn = oWspc.OpenConnection("Connection", , True, "ODBC;DSN=CLIENTDB;") Then I use a query and fetch a result set to get some table data. Set oQuery = oConn.CreateQueryDef("tmpQuery") oQuery.Sql = "SELECT idField, memoField FROM myTable" Set oRs = oQuery.OpenRecordset The problem now arises. My field is a dbMemo because the maximum content length is up to a few hundred chars. It's not that long, and in fact the value I'm reading is only a dozen characters. But Excel just doesn't seem able to handle the Memo field content at all. My code... ActiveCell = oRs.Fields("memoField") ...gives error Run-time error '3146': ODBC--call failed. Any suggestions? Can Excel VBA actually get at memo field data? Or is it just completely impossible. I get exactly the same error from GetChunk as well. ActiveCell = oRs.Fields("memoField").GetChunk(0, 2) ...also gives error Run-time error '3146': ODBC--call failed. Converting to a text field makes everything work fine. However some data is truncated to 255 characters of course, which means that isn't a workable solution.

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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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  • Problem with Informix JDBC, MONEY and decimal separator in string literals

    - by Michal Niklas
    I have problem with JDBC application that uses MONEY data type. When I insert into MONEY column: insert into _money_test (amt) values ('123.45') I got exception: Character to numeric conversion error The same SQL works from native Windows application using ODBC driver. I live in Poland and have Polish locale and in my country comma separates decimal part of number, so I tried: insert into _money_test (amt) values ('123,45') And it worked. I checked that in PreparedStatement I must use dot separator: 123.45. And of course I can use: insert into _money_test (amt) values (123.45) But some code is "general", it imports data from csv file and it was safe to put number into string literal. How to force JDBC to use DBMONEY (or simply dot) in literals? My workstation is WinXP. I have ODBC and JDBC Informix client in version 3.50 TC5/JC5. I have set DBMONEY to just dot: DBMONEY=. EDIT: Test code in Jython: import sys import traceback from java.sql import DriverManager from java.lang import Class Class.forName("com.informix.jdbc.IfxDriver") QUERY = "insert into _money_test (amt) values ('123.45')" def test_money(driver, db_url, usr, passwd): try: print("\n\n%s\n--------------" % (driver)) db = DriverManager.getConnection(db_url, usr, passwd) c = db.createStatement() c.execute("delete from _money_test") c.execute(QUERY) rs = c.executeQuery("select amt from _money_test") while (rs.next()): print('[%s]' % (rs.getString(1))) rs.close() c.close() db.close() except: print("there were errors!") s = traceback.format_exc() sys.stderr.write("%s\n" % (s)) print(QUERY) test_money("com.informix.jdbc.IfxDriver", 'jdbc:informix-sqli://169.0.1.225:9088/test:informixserver=ol_225;DB_LOCALE=pl_PL.CP1250;CLIENT_LOCALE=pl_PL.CP1250;charSet=CP1250', 'informix', 'passwd') test_money("sun.jdbc.odbc.JdbcOdbcDriver", 'jdbc:odbc:test', 'informix', 'passwd') Results when I run money literal with dot and comma: C:\db_examples>jython ifx_jdbc_money.py insert into _money_test (amt) values ('123,45') com.informix.jdbc.IfxDriver -------------- [123.45] sun.jdbc.odbc.JdbcOdbcDriver -------------- there were errors! Traceback (most recent call last): File "ifx_jdbc_money.py", line 16, in test_money c.execute(QUERY) SQLException: java.sql.SQLException: [Informix][Informix ODBC Driver][Informix]Character to numeric conversion error C:\db_examples>jython ifx_jdbc_money.py insert into _money_test (amt) values ('123.45') com.informix.jdbc.IfxDriver -------------- there were errors! Traceback (most recent call last): File "ifx_jdbc_money.py", line 16, in test_money c.execute(QUERY) SQLException: java.sql.SQLException: Character to numeric conversion error sun.jdbc.odbc.JdbcOdbcDriver -------------- [123.45]

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  • Is this an acceptable UI design decision?

    - by DVK
    OK, while I'm on record as stating that StackExchange UI is pretty much one of the best websites and overall GUIs that I have ever seen as far as usability goes, there's one particular aspect of the trilogy that bugs me. For an example, head on to http://meta.stackoverflow.com . Look at the banner on top (the one that says "reminder -- it's April Fool's Day depending on your time zone!"). Personally, I feel that this is a "make the user do the figuring out work" anti-pattern (whatever it's officially called) - namely, instead of making your app smart enough to only present a certain mode of operations in the conditions when that mode is appropriate, you simply turn on the mode full on and put an explanation to the user of why the mode is on when it should not be (in this particular example, the mode is of course displaying the unicorn gravatars starting with 00:00 in the first timezone, despite the fact that some users still live in March 31st). The Great Recalc was also handled the same way - instead of proactively telling the user "your rep was changed from X to Y" the same nearly invisible banner was displayed on meta. So, the questions are: Is there such an official anti-pattern, and if so,m what the heck do i call it? Do you have any other well-known examples of such design anti-pattern? How would you fix either the SO example I made or you your own example? Is there a pattern of fixing or must it be a case-by-case solution?

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  • Foreign keys in django admin list display

    - by Olivier
    If a django model contains a foreign key field, and if that field is shown in list mode, then it shows up as text, instead of displaying a link to the foreign object. Is it possible to automatically display all foreign keys as links instead of flat text? (of course it is possible to do that on a field by field basis, but is there a general method?) Example: class Author(models.Model): ... class Post(models.Model): author = models.ForeignKey(Author) Now I choose a ModelAdmin such that the author shows up in list mode: class PostAdmin(admin.ModelAdmin): list_display = [..., 'author',...] Now in list mode, the author field will just use the __unicode__ method of the Author class to display the author. On the top of that I would like a link pointing to the url of the corresponding author in the admin site. Is that possible? Manual method: For the sake of completeness, I add the manual method. It would be to add a method author_link in the PostAdmin class: def author_link(self, item): return '<a href="../some/path/%d">%s</a>' % (item.id, unicode(item)) author_link.allow_tags = True That will work for that particular field but that is not what I want. I want a general method to achieve the same effect. (One of the problems is how to figure out automatically the path to an object in the django admin site.)

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  • IE Display Bug, jQuery bug

    - by nute
    So I built some complex ajaxy jquery module on my homepage, with the help of "scrollable" from flowplayer.org. It works fine for me on Chrome, Opera, Firefox ... but of course IE is not playing friendly (regardless of the version, from my testing). Objects are not displaying exactly where they should, some are overlaying each other, and when a click a button some divs just disappear. However, if I resize the IE browser window up and down, the display mostly fixes itself. Then if I click on one of the buttons I made, it messes it up again. Until I resize the window again and it looks fine. To see the problem: Go to makemeheal.com Visit a couple of product pages (you need a product browsing history to see the module) Go to: http://www.makemeheal.com/mmh/home.do?forceshowIE=1 Look at the "Your Recent History" module. (note the forceshowIE=1, because by default I hide it for IE people) I was thinking maybe there is a way to force IE to redraw the entire module sometimes? Or maybe someone has a better idea on how to fix the underlying problem? Source code is available here: http://www.makemeheal.com/mmh/scripts/recentHistory.js http://www.makemeheal.com/mmh/styles/recentHistory.css Thanks

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  • Silverlight and Encryption, how to store/generate they key/iv pair?

    - by cmaduro
    I have a Silverlight app that connects to a php webservice. I want to encrypt the communication between the webservice and the Silverlight client. I'm not relying on SSL. I'm encrypting/decrypting the POST string myself using AES 256bit Key and IV. The big questions then are: How do I generate a random unique key/iv pair in PHP. How do I share this key/iv pair between the web service and silverlight client in a secure way. It seems impossible without having some kind of hard coded key or iv on the client. Which would compromise security. This is a public website, there are no logins. Just the requirement of secure communication. I can hard code the seed for the key/iv (which is hashed with SHA256 with a time stamp salt and then assigned as the key or iv) in PHP source code, that's on the server so that is pretty safe. However on the client the seed for the key/iv pair would be visible, if it is hard coded. Further more using a time stamp as the basis for uniqueness/randomness is definitely not ok, since timestamps are predictable. It does however provide a common factor between the C# code and the PHP code. The only other option that I can think of would be to have a 3rd service involved that provides the key/iv to the Silverlight client, as well as the php webservice. This of course start the cycle anew, with the question of how to store the credentials for accessing the key/iv distribution service on the Silverlight client. Sounds like the solution is then asymmetric encryption, since sensitive data will be viewed only on the administrative back end of the website. Unfortunately Silverlight has no asymmetric encryption classes. The solution? Roll my own Diffie-Hellman key exchange! Plug that key into AES256!

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  • Schliemann's method of programming language learning

    - by DVK
    Background: 19th-century German archeologist Heinrich Schliemann was of course famous for his successful quest to find and excavate the city of Troy (an actual archeological site for the Troy of Homer's Iliad). However, he is just as famous for being an astonishing learner of languages - within the space of two years, he taught himself fluent Dutch, English, French, Spanish, Italian and Portuguese, and later went on to learn seven more, including both modern and ancient Greek. One of the methods he famously used was comparison of a known text, e.g. take a book in a language one is fluent in, take a good translation of a book in a language you wish to learn, and go over them in parallel. (various sources cited the book used by Schliemann to be the Bible, or, as the link above states, a novel). Now, for the actual question. Has anyone used (or heard of) an equivalent of Schliemann's method for learning a new programming language? E.g. instead of basing the leaning on references and tutorials, take a somewhat comprehensive set of programs known to have high-quality code in both languages implementing similar/identical algorithms and learn by comparing them? I'm curious about either personal experiences of applying such an approach, or references to something published, or existance of codebases which could be used for such an approach? What got me thinking about the idea was Project Euler and some code snippets I saw on SO, in C++, Perl and Lisp.

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  • Programming activities for high school kids who have no idea what CS or programming is

    - by pointdxt
    I work at a small high school that's in a very high poverty area. There are only a handful of seniors that are thinking about applying to be an engineer of some sort in college and only 1 kid that applied for Computer Science (he has a couple acceptances so far!). He's been talking to me a lot as I majored in Computer Science as well and he is very excited about it. Unfortunately, our school doesn't have a Computer Science course of any kind so he asks me a lot of stuff. I want to help him out since he's really excited about majoring in CS but I don't know where to begin. I could say put Linux on a computer, go online and go research stuff like I did but this kid needs some direction and he doesn't even know what Linux is let alone have a free computer around for that sort of thing. He doesn't know much about CS but is keenly interested in having a computer do all sorts of things but I don't know how to help him in a meaningful way. Any advice? I'm not a teacher at the school so I'm not a great educator, I do IT at the school.

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  • addSubview insertSubview aboveSubview bit confused as to why it does not work

    - by John Smith
    I'm a bit confused all as to why the belowSubview does not work. I'm adding some (subviews) to my navigationController and all of that works well. -(UITableView *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { ... ... [self.navigationController.view addSubview:ImageView]; [self.navigationController.view addSubview:toolbar]; add some point in my app I wish to add another toolbar or image above my toolbar. so let's say I'm doing something like this -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { ... ... [self.navigationController.view insertSubview:NewImageView aboveSubview:toolbar]; //crucial of course [edit] rvController = [RootViewController alloc] initWithNibName:@"RootViewController" bundle:[NSBundle] mainBundle]; rvController.CurrentLevel += 1; rvController.CurrentTitle = [dictionary objectForKey:@"Title"]; [self.navigationController pushViewController:rvController animated:YES]; rvController.tableDataSource = Children; [rvController release]; However this doesn't work.. Does anyone know what I'm doing wrong here ... Should I have used something else instead of addSubview or is the problem somewhere else?

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  • Using PSExec from within CruiseControl .NET

    - by JayRu
    Hi All, I'm trying to call a PSExec task from CC.NET and running into some difficulties. Here's the CC project <project name="Test"> <tasks> <exec> <executable>C:\Utilities\psexec.exe</executable> <buildArgs>-u [UNAME] -p [PWD] "C:\Utilities\Joel.bat"</buildArgs> </exec> </tasks> </project> Here's the source of Joel.bat CLS @ECHO OFF What happens is that the first time I force the project to build, it runs successfully. The PSExec task is kicked off and the Joel.bat file is executed. I get some information in the build log about exit codes, but the task is successful. Here's the build log output. PsExec v1.97 - Execute processes remotely Copyright (C) 2001-2009 Mark Russinovich Sysinternals - www.sysinternals.com C:\Utilities\Joel.bat exited with error code 0. The second time I force the build I get the dreaded "The Application failed to initialize properly (0xc0000142)" error message. I can't ever run the build more than once More so, if I try to shut down the cruise control .net service from within the services MSC, it can't. It's like there's a lock somewhere that is taken and not released. The only way I can kill the service is by killing the ccservices.exe process. I've tried the exact same thing using an nant task and gotten the exact same results. It works the first time, and fails the second and I can't shutdown the process. I'm not sure if this is an issue with CC.NET or with PSEXEC (or me of course). Anybody got any ideas? I'm posting to the CC.NET forums as well. I'm using the latest and greatest of PSExec and 1.4.4 of CC.NET. Thx, Joel

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  • Error using Dynamic Data Filtering: missing datasource

    - by sebastiaan
    I am trying to use the ASP.NET Dynamic Data Filtering project, but I'm running into a problem during the configuration. I'm following the instructions on the author's blog, and everything works like described. Then it tells me to change the datasource using the designer view. I am told to select the "GridDataSource" in the "Configure data source" wizard. This option is not there though. I get all of the classes in my project, including the DataContext that was generated by Linq. When I choose "Show only DataContext objects", the dropdown ("Choose your context object:") is completely empty. When I turn of the checkbox and choose my DataContext class, I get asked which table I want and all that. But, as the whole purpose of a Dynamic Data site is NOT to use one single table, that's not much help. So I've looked at the instructions again and copied the resulting datasource from the example: <asp:DynamicLinqDataSource ID="GridDataSource" runat="server" EnableDelete="True" EnableUpdate="True"></asp:DynamicLinqDataSource> Which is exactly what I had, without the "WhereParameters" nodes in there. Now, when I run the list page however, I get an exception about a missing datasource from the filtering component. Of course when I remove the DynamicFilterRepeater, it works again. This is the meat of the exception: [InvalidOperationException: Missing DataSource] Catalyst.Web.DynamicData.DynamicFilterRepeater.GetTable() in D:\Catalyst\Projects\DynamicData\Project\Trunk\DynamicData\DynamicData\DynamicFilterRepeater.cs:74 Catalyst.Web.DynamicData.DynamicFilterRepeater.GetFilters() in D:\Catalyst\Projects\DynamicData\Project\Trunk\DynamicData\DynamicData\DynamicFilterRepeater.cs:81 Catalyst.Web.DynamicData.DynamicFilterRepeater.OnInit(EventArgs e) in D:\Catalyst\Projects\DynamicData\Project\Trunk\DynamicData\DynamicData\DynamicFilterRepeater.cs:106 How do I make the DynamicFilterRepeater recognize my datasource? I'm using VS2010 Pro, on a Win7 machine.

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  • Building a generic page "Query Analyzer" like in Asp.net with SMO

    - by Rodrigo
    Hello, I'm build a web page in ASP.net is supposed to work just like Query Analyzer. It has basically a textarea to input the sql command, and an Execute button. I'm using SMO to execute the command in the database, as follows: //Create object SMO Microsoft.SqlServer.Management.Smo.Server server = new Microsoft.SqlServer.Management.Smo.Server(new Microsoft.SqlServer.Management.Common.ServerConnection(oConn)); //To execute the command server.ConnectionContext.ExecuteNonQuery(tbx_cmd.Text); //OR myDataset = server.ConnectionContext.ExecuteWithResults(tbx_cmd.Text); The problem is that the textarea command can contain anything, from a stored procedure (with GO's statements) and any select command that return resultsets, just like Query Analyzer. But, if I have GO statements, I only can perform the query using ExecuteNonQuery method. If I use the ExecuteWithResults method, it raises errors because of the GO statements. And if I want the resultsets to be available, of course I can only use the ExecuteWithResults method. Does anybody knows how can I do to execute the same command texts at the same time? Thank you!

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  • Silverlight4 + C#: Using INotifyPropertyChanged in a UserControl to notify another UserControl is no

    - by Aidenn
    I have several User Controls in a project, and one of them retrieves items from an XML, creates objects of the type "ClassItem" and should notify the other UserControl information about those items. I have created a class for my object (the "model" all items will have): public class ClassItem { public int Id { get; set; } public string Type { get; set; } } I have another class that is used to notify the other User Controls when an object of the type "ClassItem" is created: public class Class2: INotifyPropertyChanged { // Properties public ObservableCollection<ClassItem> ItemsCollection { get; internal set; } // Events public event PropertyChangedEventHandler PropertyChanged; // Methods public void ShowItems() { ItemsCollection = new ObservableCollection<ClassItem>(); if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs("ItemsCollection")); } } } The data comes from an XML file that is parsed in order to create the objects of type ClassItem: void DisplayItems(string xmlContent) { XDocument xmlItems = XDocument.Parse(xmlContent); var items = from item in xmlItems.Descendants("item") select new ClassItem{ Id = (int)item.Element("id"), Type = (string)item.Element("type) }; } If I'm not mistaken, this is supposed to parse the xml and create a ClassItem object for each item it finds in the XML. Hence, each time a new ClassItem object is created, this should fire the Notifications for all the UserControls that are "bind" to the "ItemsCollection" notifications defined in Class2. Yet the code in Class2 doesn't even seem to be run :-( and there are no notifications of course... Am I mistaken in any of the assumptions I've done, or am I missing something? Any help would be appreciated! Thx!

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  • YUV Textures and Shaders

    - by Luca
    I've always used RGB textures. Now comes up the need of use of YUV textures (a set of three texture, specifying 1 luminance and 2 chrominance channels). Of course the YUV texture could be converted on CPU, getting the RGB texture usable as usual... but I need to get RGB pixel directly on GPU, to avoid unnecessary processor load... The problem became strange, since I require to specifyin the shader source, because a single texture, the following items: Three samplers uniforms, one for each channel Two integer uniforms, for specifying the chrominance channels sampling a mat3 uniform, for specific YUV to RGB conversion matrix. This should be done for each YUV texture... Is it possible to "compress" required uniforms, and getting RGB values quite easily? Actually i think this could aid: Texture sizes, including mipmaps, could be queried. With this, its possible to save the two integer uniforms, since the uniform values are derived the ratio between texture extents The mat3 uniforms could be collected as globals, and with preprocessor could be selected. But what design should I use for specify three (related) textures? Is it possible to use textures levels for accessing multiple textures? Texture arrays could be usable? And what about using rectangle textures, which doesn't supports mipmaps? Maybe a shader abstraction (struct definition and related function) could aid? Thank you.

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  • Best practise to send mass email within application (ASP.NET MVC 2, C#)?

    - by gurdan
    Whats the best way to implement mass email sending feature within web app? Two major cases: Email messages for separate registered users depending on their activities (just sending short reminders to user for ex about new posts in his created topic) "Send email for all registered users" functionality, it will be nice to have feature for system administrator to send some messages for all registered users. Of course adding all emails to recipient isn't the way we can go, because email addresses for each user are anonimous. As i understand for case nr1 there is no problem just create some email message via System.Net.Mail by creating new mail message and sending it... but what about case nr 2??? i guess smth like this: foreach(var emailAddress in emailAddresses) { MailMessage mail = new MailMessage(); mail.From = new MailAddress("[email protected]"); mail.To.Add(emailAddress); mail.Subject = "test"; mail.Body = "test"; SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587); smtp.Send(mail); } isn't the good way :) so the question is what is the best way to achieve this ? btw we have no possiblity to deploy some serive for email sending, this should be integrated into web application.

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  • Max Value of a Multiway Tree in OCaml

    - by Trigork
    I'm an IT Student and kind of a newbie to OCaml Recently, studying for an exam I found this exercise. Given: type 'a tree = Tree of 'a * 'a tree list Define a function mtree : 'a tree -'a, that returns the greatest value of all the nodes in a multiway tree, following the usual order relation in OCaml (<=) I've come to do something like this below, which, of course, is not working. let rec mtree (Tree (r, sub)) = let max_node (Tree(a, l1)) (Tree(b, l2)) = if a >= b then (Tree(a, l1)) else (Tree(b, l2)) in List.fold_left max_node r sub;; After reading an answer to this I'm posting the fixed code. let rec mtree (Tree(r,sub)) = let max_node (Tree(a, l1)) (Tree(b, l2)) = if a >= b then a else b in List.fold_left (max_node) r (List.map mtree sub);; The idea is the same, fold the list comparing the nodes making use of my local function to do so and travel through the tree by calling the function itself over the nodes lists of the consecutive levels. Is still not working, though. Now complains about max_node in the fold_left part. Error: This expression has type 'a tree -> 'a tree -> 'a but an expression was expected of type 'a tree -> 'a tree -> 'a tree And here I'm definitely lost because I can't see why does it expects to return an 'a tree

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  • Default Transaction Timeout

    - by MattH
    I used to set Transaction timeouts by using TransactionOptions.Timeout, but have decided for ease of maintenance to use the config approach: <system.transactions> <defaultSettings timeout="00:01:00" /> </system.transactions> Of course, after putting this in, I wanted to test it was working, so reduced the timeout to 5 seconds, then ran a test that lasted longer than this - but the transaction does not appear to abort! If I adjust the test to set TransactionOptions.Timeout to 5 seconds, the test works as expected After Investigating I think the problem appears to relate to TransactionOptions.Timeout, even though I'm no longer using it. I still need to use TransactionOptions so I can set IsolationLevel, but I no longer set the Timeout value, if I look at this object after I create it, the timeout value is 00:00:00, which equates to infinity. Does this mean my value set in the config file is being ignored? To summarise: Is it impossible to mix the config setting, and use of TransactionOptions If not, is there any way to extract the config setting at runtime, and use this to set the Timeout property [Edit] OR Set the default isolation-level without using TransactionOptions

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  • sudo port install arm-elf-gcc3 fails with "No defined site for tag: gcc…"

    - by Scott Bayes
    Am trying to get the ARM plugin for Eclipse (http://sourceforge.net/projects/gnuarmeclipse/) going on iMac i7, OS 10.6.3, Xcode 3.2.2 (don't want to upgrade during my project). The plugin needs (IIRC) arm-elf-gcc3, which needs darwinports for "easy" install. Of course, probably due to leftovers when I moved from old MacBook to iMac, Darwin ports 1.8.2 wouldn't install till I built 1.7.1 from source and installed it. darwinports 1.8.1 appears to have been properly installed, but sudo port install arm-elf-gcc3 led to 5-10 minutes of dependencies installs, then the following, produced with port -d (starting from last dependency completion for brevity): DEBUG: Found Dependency: receipt exists for gettext DEBUG: Executing org.macports.main (arm-elf-gcc3) --- Fetching arm-elf-gcc3 DEBUG: Executing org.macports.fetch (arm-elf-gcc3) --- gcc-3.4.6.tar.bz2 doesn't seem to exist in /opt/local/var/macports/distfiles/gcc Error: No defined site for tag: gcc, using master_sites Error: Target org.macports.fetch returned: can't read "host": no such variable DEBUG: Backtrace: can't read "host": no such variable while executing "info exists seen($host)" (procedure "sortsites" line 25) invoked from within "sortsites fetch_urls" (procedure "portfetch::fetchfiles" line 49) invoked from within "portfetch::fetchfiles" (procedure "portfetch::fetch_main" line 16) invoked from within "$procedure $targetname" Warning: the following items did not execute (for arm-elf-gcc3): org.macports.activate org.macports.fetch org.macports.extract org.macports.checksum org.macports.patch org.macports.configure org.macports.build org.macports.destroot org.macports.install Error: Status 1 encountered during processing. (sorry if that's a mess, neither blockquote nor code sample tags seem to properly display cut/pasted text from Terminal.app in preview window). Can anyone advise me on how to get around this (or how to build/install arm-elf-gcc3 from source if necessary)? None of the darwinports FAQs or forums mentioned arm-elf-gcc3 anywhere that I saw.

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  • Heroku and Github integration (how to structure the project)

    - by Noah
    I'm creating a webservice and I want to store the source on github and run the app on heroku. I haven't seen my exact scenario addressed anywhere on the 'net so far, so I'll ask it here: I want to have the following directory structure: /project .git README <-- project readme file TODO.otl <-- project outline ... <-- other project-related stuff /my_rails_app app config ... README <-- rails' readme file In the above, project corresponds to http://github.com/myuser/project, and my_rails_app is the code that should be pushed to heroku. Do I need a separate branch for the rails app, or is there a simpler way that I'm missing? I guess my project-related non-rails files could live in my_rails_app, but the rails README already lives there and it seems inconsistent to overwrite that. However, if I leave it, my github page for the rails app will contain the rails readme, which makes no sense. Thanks, Noah P.S. I tried just setting it up as described above and running git push heroku from the main project folder. Of course, heroku doesn't know I want to deploy the subfolder: -----> Heroku receiving push ! Heroku push rejected, no Rails or Rack app detected.

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  • How can I use external expressions in Linq with EF4 (and LINQKit)?

    - by neo
    I want to separate out often used expressions in linq queries. I'm using Entity Framework 4 and also LINQKit but I still don't know how I should do it the right way. Let me give you an example: Article article = dataContainer.Articles.FirstOrDefault(a => a.Id == id); IEnumerable<Comment> comments = (from c in container.Comments where CommentExpressions.IsApproved.Invoke(c) select c); public static class CommentExpressions { public static Expression<Func<Module, bool>> IsApproved { get { return m => m.IsApproved; } } } Of course the IsApproved expression would be something much more complicated. The problem is that the Invoke() won't work because I didn't call .asExpandable() from LINQKit on container.Comments but I can't call it because it's just an ICollection instead of an ObjectSet. So my question is: Do I always have to go through the data context when I want to include external expressions or can I somehow use it on the object I fetched (Article)? Any ideas or best practices? Thanks very much! neo

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