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  • Forcing Arrange in a Custom WPF Canvas

    - by Alex Marshall
    Hello, I'm working on a project that involves creating a custom graphical editor. The graphical editor has multiple tabs, and I want to create a preview function that will show a popup with Bitmap previews of the content of each of the tabs. However, the problem I'm running into is that the content for each of the tabs must be arranged before a proper preview can be generated for it. This means going into each of the tabs to ensure that they're rendered and arranged. Then, and only then, do the previews get properly generated, otherwise the previews have a size of 0x0. Does anybody know how to force an arrange of a content control so that I can get a properly sized preview generated ?

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  • myXmlDataDoc.DataSet.ReadXml problem

    - by alex
    Hi: I am using myXmlDataDoc.DataSet.ReadXml(xml_file_name, XmlReadMode.InferSchema); to populate the tables within the dataset created by reading in a xml schema using: myStreamReader = new StreamReader(xsd_file_name); myXmlDataDoc.DataSet.ReadXmlSchema(myStreamReader); The problems I am facing is when it comes to read the xml tag: The readXml function puts the element in a different table and everything in the tables are 0s. Here is the print out of the datatable: TableName: test_data 100 2 1 TableName: parameters 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 In my xsd file, I represent an array using this: <xs:element name="test_data"> <xs:complexType> <xs:complexContent> <xs:extension base="test_base"> <xs:sequence> <xs:element name="a" type="xs:unsignedShort"/> <xs:element name="b" type="xs:unsignedShort"/> <xs:element name="c" type="xs:unsignedInt"/> <xs:element name="parameters" minOccurs="0" maxOccurs="12" type="xs:unsignedInt"/> </xs:sequence> </xs:extension> </xs:complexContent> </xs:complexType> And here is my xml file: 100 2 1 1 2 3 4 5 6 7 8 9 10 11 12 I am expecting after the readXml function call, the "parameters" is part of the test_data table. TableName: test_data 100 2 1 1 2 3 4 5 6 7 8 9 10 11 12 Does anyone knows what's wrong? Thanks

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  • Add LINQ Auto-Generated Value Marker [Column(IsDbGenerated=true)] in Buddy Class

    - by Alex
    Hello, is it possible to decorate a field of a LINQ generated class with [Column(IsDbGenerated=true)] using a buddy class (which is linked to the LINQ class via [MetadataType(typeof(BuddyMetadata))]) ? My goal is to be able to clear and repopulate the LINQ ORM designer without having to set the "Auto Generate Value" property manually every time to re-establish the fact that certain columns are autogenerated. Thanks!

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  • Multiple Input From Keyboard C# WPF

    - by Alex
    I am writing a Tetris clone in WPF. If I hold down the right arrow key, the current piece shifts right. For playability, I want to allow the user to press another key (i.e. F-key) and rotate the moving piece without having to let go of the right arrow key first. Currently when I do this, the piece stops shifting. My first basic attempt at this was hooking into Window_PreviewKeyDown(object sender, KeyEventArgs e) and then sending a message to the controller layer. How do I structure my input-listening code to allow this? My current code Here

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  • Emulating Button Press Using Kinect/SimpleOpenNI + Processing Depth

    - by Alex Lu
    I am using Kinect with Simple OpenNI and Processing, and I was trying to use the Z position of a hand to emulate a button press. So far when I try it using one hand it works really well, however, when I try to get it to work with a second hand, only one of the hands work. (I know it can be more efficient by moving everything except the fill out of the if statements, but I kept those in there just in case I want to change the sizes or something.) irz and ilz are the initial Z positions of the hands when they are first recognized by onCreateHands and rz and lz are the current Z positions. As of now, the code works fine with one hand, but the other hand will either stay pressed or unpressed. If i comment one of the sections out, it works fine as well. if (rz - irz > 0) { pushStyle(); fill(60); ellipse(rx, ry, 10, 10); popStyle(); rpressed = true; } else { pushStyle(); noFill(); ellipse(rx, ry, 10, 10); popStyle(); rpressed = false; } if (lz - ilz > 0) { pushStyle(); fill(60); ellipse(lx, ly, 10, 10); popStyle(); lpressed = true; } else { pushStyle(); noFill(); ellipse(lx, ly, 10, 10); popStyle(); lpressed = false; } I tried outputting the values of rz - irz and lz - ilz and the numbers range from small negative values to small positive values (around -8 to 8) for lz - ilz. But rz - irz outputs numbers from around 8-30 depending on each time I run it and is never consistent. Also, when I comment out the code for the lz-ilz, the values for rz-irz look just fine and it operates as intended. Is there a reason tracking both Z positions throws off one hand? And is there a way to get it to work? Thanks!

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  • Are the built-in images in iPhone documented, and is there a list of their names somewhere?

    - by Alex Gosselin
    I discovered somewhat by accident that if you make a UIButton in Interface Builder and type in Plus in the image field, a + image appears for the button. A similar result comes from typing Minus. I am wondering if this is a bug, or if there is some way the poor programmers can access the built-in general GUI images from other apple apps, such as the green +, the red -, the detail disclosure chevron, the big red "Delete Contact" or similarly styled button, etc. Has anyone else encountered this, or know where to access these things in Xcode? It makes sense to me that they should be usable, cause the Apple HIG seems to be all about making things recognizable and intuitive, and using them the way other apps use them.

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  • Stored Procedures In Source Control - Automate Build/Deployment Process

    - by Alex
    My company provides a large .NET service-oriented solution. The services layer interact with a T-SQL back-end consisting of hundreds of tables and stored procedures. Our C# code is in version-control (SVN) but our stored procedures and schema are not. After much lobbying of expedient upper-management, I was allowed to review our (non-existent) build/deployment process to accomplish the following goals: Place schema and stored procedures under source-control. Automate the build/deployment process. I would like to proceed per the accepted answer's strategy in this post but have additional questions: I would like to use Hudson as my build server. Is this a reasonable choice for a C#/SQL solution? What better alternatives should I explore? Assuming I have all triggers, stored-procedures, schema, etc... under source control, and that they are scripted to individual files, how do I generate a build script which will take into account dependencies/references between these items? (SQL Server does this automatically, but it generates one giant script) What does the workflow of performing an update at the client look like? i.e. I have to keep existing table data. How do I roll-back schema changes? I am the only programmer. Several other pseudo-technical staff like to make changes directly inside SQL Management Studio. Is it realistic to expect others to adhere to this solution -- how can I enforce this? Thank you in advance for your help.

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  • Dynamic TextBox on LinkButton click

    - by Alex Peta
    I am creating dynamic TextBoxes in a page by clicking a LinkButton. However, after that, if the page is submitted, I can't find the items created dynamically, thus, can't send the information to the database. protected void lbAddTag_Click(object sender, EventArgs e) { for (int i = 0; i < 3;i++ ) { CreateTextBox("txtTag-" + i.ToString()); } } private void CreateTextBox(string ID) { TextBox txt = new TextBox(); txt.ID = ID; txt.Width = Unit.Pixel(300); //txt.TextChanged += new EventHandler(OnTextChanged); txt.AutoPostBack = false; tagsPanel.Controls.Add(txt); Literal lt = new Literal(); lt.Text = "<br /><br />"; tagsPanel.Controls.Add(lt); } If I put: foreach (Control c in tagsPanel.Controls) { if (c is TextBox) { lblError.Text += c.ClientID + " , "; } } in the lbAddTag_Click method I can see the items, and they exist, but if I submit the page and try to insert the values in the database nothing... Any hint is much appreciated.

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  • Create new or update existing entity at one go with JPA

    - by Alex R
    A have a JPA entity that has timestamp field and is distinguished by a complex identifier field. What I need is to update timestamp in an entity that has already been stored, otherwise create and store new entity with the current timestamp. As it turns out the task is not as simple as it seems from the first sight. The problem is that in concurrent environment I get nasty "Unique index or primary key violation" exception. Here's my code: // Load existing entity, if any. Entity e = entityManager.find(Entity.class, id); if (e == null) { // Could not find entity with the specified id in the database, so create new one. e = entityManager.merge(new Entity(id)); } // Set current time... e.setTimestamp(new Date()); // ...and finally save entity. entityManager.flush(); Please note that in this example entity identifier is not generated on insert, it is known in advance. When two or more of threads run this block of code in parallel, they may simultaneously get null from entityManager.find(Entity.class, id) method call, so they will attempt to save two or more entities at the same time, with the same identifier resulting in error. I think that there are few solutions to the problem. Sure I could synchronize this code block with a global lock to prevent concurrent access to the database, but would it be the most efficient way? Some databases support very handy MERGE statement that updates existing or creates new row if none exists. But I doubt that OpenJPA (JPA implementation of my choice) supports it. Event if JPA does not support SQL MERGE, I can always fall back to plain old JDBC and do whatever I want with the database. But I don't want to leave comfortable API and mess with hairy JDBC+SQL combination. There is a magic trick to fix it using standard JPA API only, but I don't know it yet. Please help.

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  • Dynamic instant theming a la My Yahoo / iGoogle

    - by Alex Neth
    I can think of lots of ways to do this on my own, but I was hoping to find some sort of best practice and have been having trouble finding other's experiences. I want to create easily themed HTML and provide a real-time selector for the user to experiment with themes. I want to do something like the "Change Appearance" tab at http://my.yahoo.com . I'll be using jQuery. jQuery has a "theming" system, but it seems very much focused on jQuery widgets as opposed to the whole site, and also doesn't appear to address the real-time selection aspect (the jQuery page has this functionality, but I don't think it's part of the library.) Maybe there is a jQuery plugin that already does this? Or some sort of css/jQuery framework?

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  • Why is the compiler caching my "random" and NULLED variables?

    - by alex gray
    I am confounded by the fact that even using different programs (on the same machine) to run /compile, and after nilling the vaues (before and after) the function.. that NO MATTER WHAT.. I'll keep getting the SAME "random" numbers… each and every time I run it. I swear this is NOT how it's supposed to work.. I'm going to illustrate as simply as is possible… #import <Foundation/Foundation.h> int main(int argc, char *argv[]) { int rPrimitive = 0; rPrimitive = 1 + rand() % 50; NSNumber *rObject = nil; rObject = [NSNumber numberWithInt:rand() % 10]; NSLog(@"%i %@", rPrimitive, rObject); rPrimitive = 0; rObject = nil; NSLog(@"%i %@", rPrimitive, rObject); return 0; } Run it in TextMate: i686-apple-darwin11-llvm-gcc-4.2 8 9 0 (null) Run it in CodeRunner: i686-apple-darwin11-llvm-gcc-4.2 8 9 0 (null) Run it a million times, if you'd like. You can gues what it will always be. Why does this happen? Why oh why is this "how it is"?

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  • Why is String final in Java?

    - by Alex
    From when I learned that the class java.lang.String is declared as final in Java, I was wondering why is that? I didn't find any answer back then, but this post: How to create a replica of String class in Java? reminded me of my query. Sure, String provides all the functionality I ever needed, and never thought of any operation that would require an extension of class String, but still you'll never know what someone might need! So, does anyone know what was the intent of the designers when they decided to make it final? See also: Why is String a sealed class in C#?

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  • jQuery plugin to wrap text around images + support IE6

    - by Alex
    This is a tall order, but is there a jQuery or Mootools (or other framework) plugin to wrap text around images and support IE6? I've tried the jQSlickWrap, but unless the browser supports HTML 5, you're out of luck. What's strange is that IE 6 supports the jQuery Background Canvas plugin, which uses the CANVAS object (via excanvas.js) just as this plugin does. Thanks.

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  • Redirect question using mod_rewrite (no extensions - root of site)

    - by alex
    Hi, I'm having a small problem with mod_rewrite I have the following in my .htacces: Options +FollowSymlinks RewriteEngine on RewriteRule ^(.+)\.htm$ index.php?name=$1 [NC] This is my index.php file: <?php echo $_GET['name]; ?> This works great for the following url: www.mySite.com/this is an example.htm this would display "this is an example" What i'm trying to do however, is get it to do the same, without the .htm extension: for example: www.mySite.com/this is an example Any ideas? (dont think it's relevant but i'm using xampp to test this)

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  • Dynamic resize with MPlayer and PyGTK

    - by alex
    Hi everyone; I've wrote a piece of code in python and pygtk for an embeded mplayer in a gui. I assume I use GtkSocket and the slave mode of mplayer with the -wid option. But I've got an issue, when the size of my GTK window is smaller than my stream, the stream appears to be cropped. And when the size of my window is bigger than my stream, the stream appear centred inside the widget which embed MPlayer. (a gtk.Frame but I've also try with a gtk.DrawingArea) I would like to know how I can get my stream resize dynamically depending on the window's size. I don't want to use Glade or any GUI builder. Thanks in advance for any help, and please excuse my poor english.

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  • Unable to add FromName to e-mail using cdosys in SQL Server 2008

    - by Alex Andronov
    I have a piece of cdosys code which runs correctly and generates e-mail with my SQL Server 2008 server talking to a MS Exchange 2003 Server. However the from name is not appearing on the e-mails when they arrive. Is there a fault in the code is it not possible this way? Thanks in advance usp_send_cdosysmail @from varchar(500), @to text, @bcc text , @subject varchar(1000), @body text , @smtpserver varchar(25), @bodytype varchar(10) as declare @imsg int declare @hr int declare @source varchar(255) declare @description varchar(500) declare @output varchar(8000) exec @hr = sp_oacreate 'cdo.message', @imsg out exec @hr = sp_oasetproperty @imsg, 'configuration.fields("http://schemas.microsoft.com/cdo/configuration/sendusing").value','2' exec @hr = sp_oasetproperty @imsg, 'configuration.fields("http://schemas.microsoft.com/cdo/configuration/smtpserver").value', @smtpserver exec @hr = sp_oamethod @imsg, 'configuration.fields.update', null exec @hr = sp_oasetproperty @imsg, 'to', @to exec @hr = sp_oasetproperty @imsg, 'bcc', @bcc exec @hr = sp_oasetproperty @imsg, 'from', @from exec @hr = sp_oasetproperty @imsg, 'fromname','A From Name' exec @hr = sp_oasetproperty @imsg, 'subject', @subject -- if you are using html e-mail, use 'htmlbody' instead of 'textbody'. exec @hr = sp_oasetproperty @imsg, @bodytype, @body exec @hr = sp_oamethod @imsg, 'send', null -- sample error handling. if @hr <>0 select @hr begin exec @hr = sp_oageterrorinfo null, @source out, @description out if @hr = 0 begin select @output = ' source: ' + @source print @output select @output = ' description: ' + @description print @output end else begin print ' sp_oageterrorinfo failed.' return end end exec @hr = sp_oadestroy @imsg

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  • Facebook Photo Contest App Against FB's TOS ??

    - by Alex D
    What would be possible/best practice for a Photo Contest app? Saving photos to a database and refreshing the contents with an "infinite session"? Exporting photos to my site getting written consent from my user? I've gathered that it won't be possible to present users with a number of photos to vote on because the permissions for user's photos will often not allow just anyone (the public) to view them. I've looked at SnapIt! Photo Contest on Facebook and it appears they are successful with what I'm trying to do. Are they breaking the Facebook TOS? http://apps.facebook.com/snapitphoto I'm new to Facebook development and want to be sure it is possible to do what I want before I become very invested. Any advice would be much appreciated! Thanks

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  • How do you stream M4V video on the web without using Flash?

    - by Alex
    I'm building a web site that needs to stream video and be friendly for handheld devices (especially the iPhone). Some handhelds don't support Flash so I'm avoiding the use of a Flash player. How does Youtube stream its videos so that they play on both desktops and iPhones? I'm looking for a player, or multiple players, which can be somehow activated based on the user's device. Your help and guidance are much appreciated. Thanks.

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  • Are CMAttitude and CATransform3D related by rotational matrices?

    - by Alex Stone
    I'm looking at the core motion class CMAttitude, it can express the device's orientation as a 3x3 rotational matrix. At the same time I've taken a look at the CATransform3D, which encapsulates the view's attitude, as well as scaling. The CATransform3D is a 4x4 matrix. I've seen that the OpenGL rotational matrix is 4x4 and is simply 0001 padded in the 4th row and column. I'm wandering if the CMAttitude's rotational matrix is related to CATransform's matrix? Can I use the device's rotation in space obtained via a rotational matrix to transform a UIView using CATransform3D? My intention is to let the user move the phone and apply the same transform to a UIView on the screen. Bonus question: if they are related, how do I transform a CMAttitude's rotational matrix to CATransform3D?

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