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  • How do you implement file drag-and-drop upload in Google Chrome?

    - by Chris R
    I've found several tutorials online about implementing file drag/drop with Firefox 3.6 (they involve using a FileReader object to get the file binary data). However, I cannot create a FileReader object in Chrome on Windows or Mac. Does anyone know what the API is to read and manipulate data from a drag-and-dropped file in Chrome? If I can get the binary data of the file, I already have the rest of the code to perform the upload. Note: I've also tried using the getAsBinary() function call on the file object of the drag event (event.dataTransfer.file) but I believe that is a Mozilla-specific function and not implemented in Chrome. Also, I'm not interested in a solution using google gears or one that requires a user to select files from a dialog. I'm specifically trying to implement a drag-and-drop file upload.

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  • Is it possible to compile IronRuby code to a .NET assembly (EXE or DLL)

    - by Chris Ammerman
    My scenario consists of the following points. I have a packaged software product I am developing in C# Since it is a packaged product, the public interfaces of the assemblies need to be tightly controlled... All assemblies are strong-named Any classes that don't absolutely have to be "public" are "internal" I want to write unit tests for those "internal" classes, since they are the bulk of the code And finally.... I want to try writing the unit tests in Ruby. Since the unit tests would be external to the assembly containing the code under test, the assemblies under test would each need to have an "InternalsVisibleTo" attribute specifying the name of the unit test assembly. Which of course would mean that the Ruby unit tests would have to compile down to a .NET assembly so they can be given access in this way. Can this be done? If so, how? All I can find on the web about "compiling IronRuby" is about building the actual IronRuby runtime from source.

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  • Spreadsheet ML Text Color (Colour) Rendering

    - by Chris Roberts
    Hi All, I am writing a tool which generates some Spreadsheet ML (XML) to create an Excel spreadsheet for my users. I have defined a style as follows: <Style ss:ID="GreenText"> <Font ss:FontName="Arial" ss:Size="9" ss:Color="#8CBE50" /> </Style> This works to an extent, but when I open it in Excel the colour rendered for the text isn't the one I specified - it's a brighter version. I can use the same colour reference for a cell border and the colour is rendered correctly. Can anyone shed any light on why the text colour isn't rendered correctly? Thanks!

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  • Linux support for click-thru licenses

    - by Chris Quenelle
    I want to publish some software for different Linux distributions, using the regular Linux packaging formats (rpm, deb, yast, etc). My package will require a click-thru license agreement. Which Linux tools and package formats support a license in the package which is shown to the user before installing the software?

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  • floating point precision in ruby on rails model validations

    - by Chris Allison
    Hello I am trying to validate a dollar amount using a regex: ^[0-9]+\.[0-9]{2}$ This works fine, but whenever a user submits the form and the dollar amount ends in 0(zero), ruby(or rails?) chops the 0 off. So 500.00 turns into 500.0 thus failing the regex validation. Is there any way to make ruby/rails keep the format entered by the user, regardless of trailing zeros?

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  • Replace duplicate spaces with single space in TSQL

    - by Chris
    I need to ensure that a given field does not have more than one space (not concerned about all white space, just space) between characters. So 'single spaces only' Needs to turn into 'single spaces only' The below will not work select replace('single spaces only',' ',' ') as it would result in 'single spaces only' I would really prefer to stick with native TSQL rather than a CLR based solution. Thoughts?

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  • UISearchBar animation hidding button

    - by David Carvalho
    Hello I currently have a UISearchBar (attached to a UISearchDisplayController), but I reduced the width of the search bar so I could display a custom button to its right when the search bar is not selected. The button is used to access other views. However, when I select the search bar and then press cancel (or even perform a search) and return to the normal view, where the search bar should be displayed with my custom button, the search bar animates and takes up all the room for the button and the is not displayed. Essentially, the search bar takes up all the width of the screen when I only want it to take up a part of it. Is there any way to prevent the search bar from animating to the whole width of the screen? This is how I defined the CGRect of the search bar: self = [[UISearchBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 250.0f, 45.0f)] Any help would be great. Regards

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  • Javafx - Clipview to a Group?

    - by Chris-NTA
    Can I apply clipview to a vertical expanding Group? Time to time I'm appending text to a group and want to use scrollbar to navigate in that group. The scrollbar part is working when I assign it to the group itself but want to limit the size of the group by using clipview. Anyone having experience in this?

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  • Lazy Loading wpf Combobox items

    - by Chris McGrath
    I have an IEnumerable< which lazy loads it's data. I want to just set a Combobox's ItemsSource to the IEnumerable, but when I do it goes and loads all the data anyway (which removes the point of lazy loading). I've tried it with Linq-To-Sql as well since it seems to be a similar theory and it also loads all the data. Is there an easy way to do this?

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  • CryptographicException: Padding is invalid and cannot be removed and Validation of viewstate MAC fai

    - by Chris Marisic
    Monitoring my global exception logs this error seems to be impossible to remove no matter what I do, I thought I finally got rid of it but it's back again. You can see a strack trace of the error on a similar post here. Notes about the environment: IIS 6.0, .NET 3.5 SP1 single server ASP.NET application Steps already taken: <system.web> <machineKey validationKey="big encryption key" decryptionKey="big decryption key" validation="SHA1" decryption="AES" /> In my Page Base for all of my pages protected override void OnInit(EventArgs e) { const string viewStateKey = "big key value"; Page.ViewStateUserKey = viewStateKey; } Also in the source of the page I can see that all of the ASP.NET generated hidden fields are correctly at the top of the page.

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  • mysql innodb max size of transaction

    - by chris
    Using mysql 5.1.41 and innodb I'm doing some data import, but can't use load data infile, so I'm manually issuing insert statements. I found that it's much faster to disable auto commit and issue say, 100 insert statements and then commit, instead of the implicit commit after each insert. It got me thinking, what limits are there to how much data I can put into a transaction? Is there a limit on the number of statements, or does it have to do with the size in bytes etc...?

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  • Sharing output streams through a JNI interface

    - by Chris Conway
    I am writing a Java application that uses a C++ library through a JNI interface. The C++ library creates objects of type Foo, which are duly passed up through JNI to Java. Suppose the library has an output function void Foo::print(std::ostream &os) and I have a Java OutputStream out. How can I invoke Foo::print from Java so that the output appears on out? Is there any way to coerce the OutputStream to a std::ostream in the JNI layer? Can I capture the output in a buffer the JNI layer and then copy it into out?

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  • How to determine the data type of a CvMat

    - by Chris
    When using the CvMat type, the type of data is crucial to keeping your program running. For example, depending on whether your data is type float or unsigned char, you would choose one of these two commands: cvmGet(mat, row, col); cvGetReal2D(mat, row, col); Is there a universal approach to this? If the wrong data type matrix is passed to these calls, they crash at runtime. This is becoming an issue, since a function I have defined is getting passed several different types of matrices. How do you determine the data type of a matrix so you can always access its data? I tried using the "type()" function as such. CvMat* tmp_ptr = cvCreateMat(t_height,t_width,CV_8U); std::cout << "type = " << tmp_ptr->type() << std::endl; This does not compile, saying "term does not evaluate to a function taking 0 arguments". If I remove the brackets after the word type, I get a type of 1111638032 EDIT minimal application that reproduces this... int main( int argc, char** argv ) { CvMat *tmp2 = cvCreateMat(10,10, CV_32FC1); std::cout << "tmp2 type = " << tmp2->type << " and CV_32FC1 = " << CV_32FC1 << " and " << (tmp2->type == CV_32FC1) << std::endl; } Output: tmp2 type = 1111638021 and CV_32FC1 = 5 and 0

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  • Coercing Json Serializer into producing a particular datetime format (yyyy-mm-ddThh:mm:ss.msmsmsZ)

    - by Chris McCall
    MyClass theSession = new MyClass() { accountId = 12345, timeStamp = DateTime.Now, userType = "theUserType" }; System.Web.Script.Serialization.JavaScriptSerializer Json = new System.Web.Script.Serialization.JavaScriptSerializer(); Response.Write(Json.Serialize(theSession)); Produces: {"accountId":12345,"timeStamp":"\/Date(1268420981135)\/","userType":"theUserType"} How can I present the date as: "timestamp":"2010-02-15T23:53:35.963Z" ?

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  • Rotation Interpolation

    - by Rob
    Hello, NB: I'll present this question in degrees purely for simplicity, radians, degrees, different zero-bearing, the problem is essentially the same. Does anyone have any ideas on the code behind rotational interpolation? Given a linear interpolation function: Lerp(from, to, amount), where amount is 0...1 which returns a value between from and to, by amount. How could I apply this same function to a rotational interpolation between 0 and 360 degrees? Given that degrees should not be returned outside 0 and 360. Given this unit circle for degrees: where from = 45 and to = 315, the algorithm should take the shortest path to the angle, i.e. it should go through zero, to 360 and then to 315 - and not all the way round 90, 180, 270 to 315. Is there a nice way to achieve this? Or is it going to just be a horrid mess of if() blocks? Am I missing some well understood standard way of doing this? Any help would be appreciated.

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  • [PHP] missing keys in $_POST

    - by KPL
    Hello there, I am trying to get some form data from POST method. Here's the code of form - <form action="" method="post" name="form1" id="form1"> <input type="hidden" value="15" name="ad_id"> <table width="100%" cellspacing="0" cellpadding="0" border="0" class="block"> <tbody><tr> <td valign="top">&nbsp;</td> <td align="right">all fields are required</td> </tr> <tr> <td valign="top">&nbsp;</td> <td align="center"></td> </tr> <tr> <td valign="top" width="150"><label for="name">Advertisement Name</label> *</td> <td><input type="text" size="45" value="Banner" id="name" name="name"> e.g Home Banner</td> </tr> <tr> <td valign="top"><label for="placement">Advertisement Placement</label></td> <td><select id="placement" name="placement"> Wide Skyscrapper 160 x 600 </tr> <tr> <td valign="top"><label for="code">Advertisement Code</label></td> <td><textarea rows="5" cols="45" id="code" name="code"></textarea></td> </tr> <tr> <td>Status</td> <td><label> <input type="radio" checked="checked" value="1" name="status"> Active</label> <label> <input type="radio" value="0" name="status"> Inactive</label></td> </tr> <input type="hidden" value="1" name="banner_uploaded" id="banner_uploaded"> <tr> <td>For Country - </td> <td> <select id="country" name="country"> <option>Not posting all the names of country</option> </select> </td> </tr> <tr> <td><label for="Scheduling">Valid From </label></td> <td><input type="text" value="" id="date-from" name="date-from"> Format : dd/mm/yyyy:hh/mm</td> </tr> <tr> <td><label for="Scheduling">Valid Till </label></td> <td><input type="text" value="" id="date-to" name="date-to"> Format : dd/mm/yyyy:hh/mm</td> </tr> <tr> <td>&nbsp;</td> <td align="right"><input type="submit" onclick="return validate_ad_form(add_adv)" value="Update Advertisement" class="button" name="update"></td> </tr> </tbody></table> </form> But I am getting $_POST['code'] empty when I am passing HTML code through it. When I pass plain text, it works fine. When I printed $_POST [i.e. used - print_r($_POST) ], I got the following output - Array ( [ad_id] = 15 [name] = Banner [placement] = ad_468x60 [code] = [status] = 1 [banner_uploaded] = 1 [country] = IN [date-from] = [date-to] = [update] = Update Advertisement ) Please be known, I haven't entered the 'date-from','date-to' fields. I have entered on purpose as StackOverflow don't allow me to post images! People,any help will be highly appreciated.

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  • Dynamically pixelate an html image element

    - by Chris Armstrong
    I'm to take an image on a webpage, and then use javascript (or whatever would be best suited) to dynamically 'pixelate' it (e.g. into 20px squares). Then, as the user scrolls down the page, I need the image to gradually increase in resolution, till it is no longer pixelated. Any ideas how I could go about doing this? I realise I could use php to resize an image and several times and just switch out the image, but that would require loading several extra images. Also, I know I could probably do the effect with flash & pixelbender, but I want to achieve it within the limitations of HTML5, CSS & Javascript if possible. Appreciate any thoughts!

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  • How can you debug Lego Mindstorms programs?

    - by chris
    Is there any way to add any sort of debugging to a Lego Mindstorms program, when using the NXT drag-and-drop environment? It would be nice to be able to monitor the status of the various sensors, but even knowing what step in the program was running would be nice.

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  • Accessing other controls by name in a Silverlight ControlTemplate

    - by Chris S
    I have a custom control that inherits from ContentControl. Inside the generic.xaml file is a simple Grid with 2 rows: Row 1 - A toggle button Row 2 - A StackPanel with a TextBlock, named "Stackpanel1" The ToggleButton has its own nested ControlTemplate which has VisualStates for Checked/Unchecked. Is it possible to reference "Stackpanel1" from inside the ToggleButton's control template somehow? In order to show or hide the stackpanel.

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  • Which Ant property contains the CWD when the ant script is run?

    - by Chris R
    I don't want to get the basedir -- that appears to contain the build.xml script -- I want the CWD of the call to ant itself. Basically, I want to do this: $ cd /home/chrisr/projects/some_project $ ant -f ../../tools/ant-build-rules/library.xml build-library At this point, I need two things: The path to ant-build-rules in absolute form; this is currently found in the basedir property, so I'm set there. The path of some_project, in absolute form. This is what I don't know how to get. Which property contains this information?

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  • Compress file to bytes for uploading to SQL Server

    - by Chris
    I am trying to zip files to an SQL Server database table. I can't ensure that the user of the tool has write priveledges on the source file folder so I want to load the file into memory, compress it to an array of bytes and insert it into my database. This below does not work. class ZipFileToSql { public event MessageHandler Message; protected virtual void OnMessage(string msg) { if (Message != null) { MessageHandlerEventArgs args = new MessageHandlerEventArgs(); args.Message = msg; Message(this, args); } } private int sourceFileId; private SqlConnection Conn; private string PathToFile; private bool isExecuting; public bool IsExecuting { get { return isExecuting; } } public int SourceFileId { get { return sourceFileId; } } public ZipFileToSql(string pathToFile, SqlConnection conn) { isExecuting = false; PathToFile = pathToFile; Conn = conn; } public void Execute() { isExecuting = true; byte[] data; byte[] cmpData; //create temp zip file OnMessage("Reading file to memory"); FileStream fs = File.OpenRead(PathToFile); data = new byte[fs.Length]; ReadWholeArray(fs, data); OnMessage("Zipping file to memory"); MemoryStream ms = new MemoryStream(); GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true); zip.Write(data, 0, data.Length); cmpData = new byte[ms.Length]; ReadWholeArray(ms, cmpData); OnMessage("Saving file to database"); using (SqlCommand cmd = Conn.CreateCommand()) { cmd.CommandText = @"MergeFileUploads"; cmd.CommandType = CommandType.StoredProcedure; //cmd.Parameters.Add("@File", SqlDbType.VarBinary).Value = data; cmd.Parameters.Add("@File", SqlDbType.VarBinary).Value = cmpData; SqlParameter p = new SqlParameter(); p.ParameterName = "@SourceFileId"; p.Direction = ParameterDirection.Output; p.SqlDbType = SqlDbType.Int; cmd.Parameters.Add(p); cmd.ExecuteNonQuery(); sourceFileId = (int)p.Value; } OnMessage("File Saved"); isExecuting = false; } private void ReadWholeArray(Stream stream, byte[] data) { int offset = 0; int remaining = data.Length; float Step = data.Length / 100; float NextStep = data.Length - Step; while (remaining > 0) { int read = stream.Read(data, offset, remaining); if (read <= 0) throw new EndOfStreamException (String.Format("End of stream reached with {0} bytes left to read", remaining)); remaining -= read; offset += read; if (remaining < NextStep) { NextStep -= Step; } } } }

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  • SQL-query task, decision?

    - by Sirius Lampochkin
    There is a table of currencies rates in MS SQL Server 2005: ID | CURR | RATE | DATE 1   | USD   | 30      | 01.10.2010 3   | GBP   | 45      | 07.10.2010 5   | USD   | 31      | 08.10.2010 7   | GBP   | 46      | 09.10.2010 9   | USD   | 32      | 12.10.2010 11 | GBP   | 48      | 03.10.2010 Rate are updated in real time and there are more than 1 billion rows in the table. It needs to write a SQL-query, wich will provide latest rates per each currency. My decision is: SELECT c.[id],c.[curr],c.[rate],c.[date] FROM [curr_rate] c, (SELECT curr, MAX(date) AS rate_date FROM [curr_rate] GROUP BY curr) t WHERE c.date = t.rate_date AND c.curr = t.curr ORDER BY c.[curr] ASC Is it possible to write a query without sub-queries and join's with derived tables?

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  • Importing fixtures with foreign keys and SQLAlchemy?

    - by Chris Reid
    I've been experimenting with using fixture to load test data sets into my Pylons / PostgreSQL app. This works great except that it fails to properly create foreign keys if they reference an auto increment id field. My fixture looks like this: class AuthorsData(DataSet): class frank_herbert: first_name = "Frank" last_name = "Herbert" class BooksData(DataSet): class dune: title = "Dune" author_id = AuthorsData.frank_herbert.ref('id') And the model: t_authors = sa.Table("authors", meta.metadata, sa.Column("id", sa.types.Integer, primary_key=True), sa.Column("first_name", sa.types.String(100)), sa.Column("last_name", sa.types.String(100)), ) t_books = sa.Table("books", meta.metadata, sa.Column("id", sa.types.Integer, primary_key=True), sa.Column("title", sa.types.String(100)), sa.Column("author_id", sa.types.Integer, sa.ForeignKey('authors.id')) ) When running "paster setup-app development.ini", SQLAlchemey reports the FK value as "None" so it's obviously not finding it: 15:59:48,683 INFO [sqlalchemy.engine.base.Engine.0x...9eb0] INSERT INTO books (title, author_id) VALUES (%(title)s, %(author_id)s) RETURNING books.id 15:59:48,683 INFO [sqlalchemy.engine.base.Engine.0x...9eb0] {'author_id': None, 'title': 'Dune'} The fixture docs actually warn that this might be a problem: "However, in some cases you may need to reference an attribute that does not have a value until it is loaded, like a serial ID column. (Note that this is not supported by the SQLAlchemy data layer when using sessions.)" http://farmdev.com/projects/fixture/using-dataset.html#referencing-foreign-dataset-classes Does this mean that this is just not supported with SQLAlchemy? Or is it possible to load the data without using SA "sessions"? How are other people handling this issue?

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