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• javascript __doPostBack doesn't seem to work for me...

  - by Pandiya Chendur

  I use yui datatable in my asp.net application... I have a link button in one of my columns and it works fine but doesn't do a postback of a hidden button... myDataTable.subscribe("linkClickEvent", function(oArgs) { javascript: __doPostBack('ctl00_ContentPlaceHolder1_Button1', ''); YAHOO.util.Event.stopEvent(oArgs.event); }); and in my page <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" style="display:none;" /> protected void Button1_Click(object sender, EventArgs e) { DownloadFile(Hfhref.Value, true); } I used break point but it doesn't seem to get the __dopostback.. Any suggestion...

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• My code gets an argument error, expecting 1 but got 0 - AS3

  - by Louis Cottier

  I've got this code with a variable of platform, which I'm trying to link with the actual object of Platform in my .fla file but I get this error when I run it; ArgumentError: Error #1063: Argument count mismatch on Code(). Expected 1, got 0. In my output window. package { import flash.display.MovieClip; import flash.events.MouseEvent; import flash.events.KeyboardEvent; import flash.events.Event; import flash.ui.Keyboard; public class Code extends MovieClip { var charSpeed:int = 0; var velocity:int = 0; var gravity:Number = 1; var Jump:Boolean = false; public function startGame(){ stage.addEventListener(KeyboardEvent.KEY_DOWN, checkKeyDown); stage.addEventListener(KeyboardEvent.KEY_UP, checkKeyUp); stage.addEventListener(Event.ENTER_FRAME, loop); } private var platform:Platform; public function Code(value:Platform) { platform = value; } function checkKeyDown(evt:KeyboardEvent){ if (evt.keyCode == Keyboard.LEFT){ charSpeed -= 10; } if (evt.keyCode == Keyboard.RIGHT){ charSpeed += 10; } if (evt.keyCode == Keyboard.DOWN){ if(!Jump){ velocity -= 14; Jump = true; } } } function checkKeyUp(evt:KeyboardEvent){ if (evt.keyCode == Keyboard.LEFT){ charSpeed = 0; } if (evt.keyCode == Keyboard.RIGHT){ charSpeed = 0; } } function loop(evt:Event){ player.x = velocity; if (player.x < 0){ player.x = 0; } if (player.x > 550){ player.x = 550; } velocity += gravity; var Platform:Array = new Array(platform) if (!Platform.hitTestPoint(player.x, player.y, true)){ player.y += velocity; } for (var i = 0; i < 10; i++){ if (Platform.hitTestPoint(player.x, player.y, true)){ player.y--; velocity = 0; Jump = false; } } } } } The as3 file name is Code, and the fla file name is Game. My objective is to get my player to move around on the platform using the arrow keys. The linkage of my platform is "Platform". If anyone could help that would be great

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• change the user informatoin on each row click in the jquery grid

  - by kumar

  hello friends I am using jquery grid, I have a grid with user data, I need a code to handle to handle the click on each row? that is if I click First row I need to display first row user information in the bottom of the grid, if I click second row I need to dispaly second user iformation on the grid can any body help me out how to handle the click event using jquery/ Here is my code.. $("#table1").Click(function()///// how to handle the click event for each row and how to pass the ID value to change the user each time on click { $("#table2").show(); } thanks

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• how do I notify child controls of a change in the parent

  - by fishhead

  what is the best way to keep a child control up to date for changes in the parent. I have a number of child controls hosted inside my parent object and I can think of two ways to send change information to them. 1) wire the child control to an event in the parent. and fire that event on a change in the parent 2) keep a list of the children in an array and intenerate through the array when the change has happened and invoke a method in the child to handle the new changes. I hope I describe it okay. both work but there is probably a right way to handle this and a wrong way.

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• HTTP resource bundling/streaming practice

  - by icelava

  Our SPA (plain HTML and Javascript) makes use of huge volume of javascript and other resources that are downloaded via XHR. Given the sheer number of components and browser simultaneous request limits, we're thinking for ways to deliver our resources in a more efficient manner. A method we're considering is bundling several resources that logically form a coherent group into a single file; thus reducing down to only one XHR (per group). Furthermore to make it more responsive, we'd like to constantly inspect the partial responseText during the LOADING state, determining if a usable chunk (atomic resource) has already been downloaded, and make it available for deserialization/processing even before the XHR is DONE. (a stream-like experience) We're thinking surely somebody else would've considered roughly the same approach before, but haven't really come across any library/framework or container file format that is suitable for our scenario. Anybody else know of something similar?

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• Missing error handling in Streaming-AJAX-Proxy Log

  - by Michael Freidgeim

  We are using AjaxProxy(FROM http://www.codeproject.com/KB/ajax/ajaxproxy.aspx) on our web site, but started to notice errors accessing log.txt file. I found that the file is created by Log class and doesn't have ability to switch it off and error handling. I've added reading file name from configuration and try/catch block   public static class Log     {         private static StreamWriter logStream;         private static object lockObject = new object ();     public static void WriteLine(string msg)         {                       string logFileName = ConfigurationExtensions.GetAppSetting("AjaxStreamingProxy.LogFile" ,"");                       if (logFileName.IsNullOrEmpty())                             return;                       try                      {                             if (logStream == null )                            {                                    lock (lockObject)                                   {                                           if (logStream == null )                                          {                            logStream = File.AppendText(Path .Combine(AppDomain.CurrentDomain.BaseDirectory, logFileName));                                          }                                   }                            }                            logStream.WriteLine(msg);                      }                       catch (Exception exc)                      {                             string ignoredMsg = String .Format("The error occured while logging {0}, but processing will continue.\n {1} ", exc);                             LoggerHelper.LogEvent(ignoredMsg, MyCategorySource, TraceEventType .Warning, true);                      }         }

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• How can I learn to write idiomatic C++?

  - by yati sagade

  I am a computer science student, and as a result, I was taught C++ as a better version of C with classes. I end up trying to reinvent the wheel whenever a solution to a complex problem is needed, only to find sometime after that, some language feature or some standard library routine could potentially have done that for me. I'm all comfortable with my char* and *(int*)(someVoidPointer) idioms, but recently, after making a (minor) contribution to an open-source project, I feel that is not how one's supposed to think when writing C++ code. It's much different than C is. Considering that I know objected-oriented programming fairly well, and I am okay with a steep learning curve, what would you suggest for me to get my mind on the C++ track when I'm coding C++?

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• Thread count in Java game

  - by Taylor Hill

  I'm just curious as to what a reasonable number of threads is for a simple 2D mmo in Java. Is it reasonable to have two threads per connection, one for the input stream and one for the output stream? The reason I ask is because I use a blocking method on the input stream, and a workaround seems unnecessarily complex if I were to try to get around it without adding threads. This is mostly for my own edification; I don't expect to have 5 million people playing it ever, or even 5, but I'm wondering what a good scalable solution is, and if this is reasonable for a small server (<30 connections).

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• Javascript form validation events

  - by user307922

  Hi All, I am making a small form for a php app and had a question regarding javascript validation. What is the best event to run the javascript validation on the input value? Is it the "focusout" event? I used "focusout" to originally but it creates problems when the user hits enter while they are still focused on any particular field in the form. Should I run the js validation when the user clicks submit? Just looking for some advice. Thanks! Chuck

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• QtWebkit and hasPendingEvents() always True

  - by Deorf

  Hello. I use project webkit2png (slightly appended) to take screenshots in Linux. On the server running the latest version QtWebkit and Python 2.6 On some sites (eg 118114.cn) problem and the application hangs forever. Debug shows that the problem in this code snippet: while self.__loading:    if timeout 0 and time.time() = cancelAt:       raise RuntimeError("Request timed out on %s" % url)    while QApplication.hasPendingEvents():       QCoreApplication.processEvents() Full version of the source code is available here (lines 270-275) Somehow Loading-event hangs and hasPendingEvents can not be False. Most of the screenshots are created normally, but sometimes due to some URL drops my app: ( Does anyone know how to solve this problem and why the event hangs?

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• How to handle HTML rendering in C# WebBrowser control?

  - by sashaeve

  Is any way to handle a moment when HTML page is rendered on C# WebBrowser control? Edit. WebBrowser control has many events such as Navigated, GotFocus etc. I need to handle an event when HTML is rendered inside the control. Just wondered is it possible. For example, in asp.net we have OnRender, OnInit, OnLoad, OnPreLoad events which form web-page life-cycle. OnLoad in asp.net is something like Navigated for WebBrowser, the idea is to handle event similar to OnRender.

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• Basic drawing with Quartz 2D on iPhone

  - by wwrob

  My goal is to make a program that will draw points whenever the screen is touched. This is what I have so far: The header file: #import <UIKit/UIKit.h> @interface ElSimView : UIView { CGPoint firstTouch; CGPoint lastTouch; UIColor *pointColor; CGRect *points; int npoints; } @property CGPoint firstTouch; @property CGPoint lastTouch; @property (nonatomic, retain) UIColor *pointColor; @property CGRect *points; @property int npoints; @end The implementation file: //@synths etc. - (id)initWithFrame:(CGRect)frame { return self; } - (id)initWithCoder:(NSCoder *)coder { if(self = [super initWithCoder:coder]) { self.npoints = 0; } return self; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; firstTouch = [touch locationInView:self]; lastTouch = [touch locationInView:self]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; lastTouch = [touch locationInView:self]; points = (CGRect *)malloc(sizeof(CGRect) * ++npoints); points[npoints-1] = CGRectMake(lastTouch.x-15, lastTouch.y-15,30,30); [self setNeedsDisplay]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; lastTouch = [touch locationInView:self]; [self setNeedsDisplay]; } - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 2.0); CGContextSetStrokeColorWithColor(context, [UIColor blackColor].CGColor); CGContextSetFillColorWithColor(context, pointColor.CGColor); for(int i=0; i<npoints; i++) CGContextAddEllipseInRect(context, points[i]); CGContextDrawPath(context, kCGPathFillStroke); } - (void)dealloc { free(points); [super dealloc]; } @end When I load this and click some points, it draws the first points normally, then then next points are drawn along with random ellipses (not even circles). Also I have another question: When is exactly drawRect executed?

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• Temenos WealthManager: performance benchmark on Exadata

  - by Javier Puerta

  Temenos WealthManager is at work in financial institutions of all sizes. No matter the size, each of Temenos’ customers has one requirement in common: a need for fast technology. This led Temenos to conduct a performance benchmark, running its WealthManager platform on Oracle Exadata Database Machine. During the study, Temenos executed high-intensity financial engines two- to three-times faster than its previous internal benchmarks and/or largest customer throughput. The company also demonstrated greater than two-times the average improvement in response times for six-times the number of users and data volumes. Further, Temenos secured a two-times gain in service-level agreements for batch and user-oriented workloads via dedicated or parallelized processing windows. Last year Temenos also communicated the availability of its T24 core banking system and how the benchmark run demonstrated the ability of Oracle’s Exadata platform to comfortably support the highest banking volumes for T24. Read full story here  

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• symfony2.4 ajax call update or set session issues

  - by user3797283

  i have an issue with symfony2 when i use ajax to set session, hope u pro guys can help me. here is my controller code: //show month event list public function indexAction() { if ($this->getRequest()->isXmlHttpRequest()) { $paging = $this->getRequest()->get("nom"); $session = $this->getRequest()->getSession(); if ($paging) { //if $paging is set, then that's a click pager ajax event //(not 1st time load) $year = $paging; $session->set('year', $year); } else { //$paging is null, it's the first time page load $year = (new \DateTime())->format("Y"); $session->set('year', $year); } $repository = $this ->getDoctrine() ->getManager() ->getRepository('HycAccountBundle:MonthEvent'); $annuallist = $repository->monthListByYear($year); $jsonlist = json_encode($annuallist); return new Response($jsonlist); } //this part is to return entity to twig for using after $em = $this->getDoctrine()->getManager(); $allimages = $em->getRepository('HycAccountBundle:TypeImage') ->findAll(); return $this->render('HycAccountBundle:Account:index.html.twig', array('allimages' => $allimages)); } here is my twig code: <script type="text/javascript"> $(function() { $(document).ready(function (){ jQuery.ajax({ type: 'GET', cache: false, url: "{{ path('hyc_account_homepage') }}", success: function(data, textStatus, jqXHR) { alert({{app.session.get('year')}}); //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! //!!!!!!!!! here i can get year 2014 !!!!!!!!!!!!!! //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! }, error:function (){ alert('error!'); } }); return false; }); }); </script> but when i click pager part, for example, i click year 2013, then ajax call will return a number (data: 'nom=' + num) to controller, but there i reset session value to num normally, but i cant get alert correct session (it's always 2014 as the 1st time) here is the code ajax, almost same as above: <script type="text/javascript"> $(document).ready(function(){ //after paging, reload month $('#page-selection').bootpag({ total: 3000, page: 2014, maxVisible: 5 }).on('page', function(event, num){ jQuery.ajax({ type: 'GET', url: "{{ path('hyc_account_homepage') }}", data: 'nom=' + num, success: function(data, textStatus, jqXHR) { alert({{app.session.get('year')}}); //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! //here is the problem, it's always 2014, not set again !!!!!!!! //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! }, error:function (){ alert('error!'); } }); return false; }); }); </script> hope u guys help me, thanks in advance, i've tried for almost 1 day and looked for almost all in google but find nothing = =

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• Web programming, standard way to deal with a response that takes time to complete

  - by wobbily_col

  With normal form submission I use the pattern Post / Redirect / Get, when processing the forms. I have a database application built with Django. I want to allow the users to select a number of items from the database, then launch a computationally intensive task based on those items. I expect the task to take between 10 minutes and 2 hours to complete. Is there a standard approach to dealing with requests like this (i.e. that don't return immediately)? Ideally there would be some way to display the progress.

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• How can I get the edit control in a cell of a DataGridView to validate itself?

  - by Stuart Helwig

  It appears that the only way to capture the keypress events within a cell of a DataGridView control, in order to validate user input as they type, is to us the DataGridView controls OnEditControlShowing event, hook up a method to the edit control's (e.Control) keypress event and do some validation. My problem is that I've built a heap of custom DataGridView column classes, with their own custom cell types. These cells have their own custom edit controls (things like DateTimePickers, and Numeric or Currency textboxes.) I want to do some numeric validation for those cells that have Numeric of Currency Textboxes as their edit controls but not all the other cell types. How can I determine, within the DataGridView's "OnEditControlShowing" override, whether or not a particular edit control needs some numeric validation? (In the meantime I've restorted to setting the Tag property of my custom edit controls to a known value and any Edit Controls I find in the OnEditControlShowing override, I hook to my validation routine - I don't like that much!)

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• QGraphicsItem doesn't receive mouse hover events

  - by Jen

  I have a class derived from QGraphicsView, which contains QGraphicsItem-derived elements. I want these elements to change color whenever the mouse cursor hovers over them, so I implemented hoverEnterEvent (and hoverLeaveEvent): void MyGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent* event) { update (boundingRect()); } However, this event handler code is never executed. I've explicitly enabled mouse tracking: MyGraphicsView::MyGraphicsView(MainView *parent) : QGraphicsView(parent) { setMouseTracking(true); viewport()->setMouseTracking(true); ... } Still, no luck. What am I doing wrong?

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• Optimum Number of Parallel Processes

  - by System Down

  I just finished coding a (basic) ray tracer in C# for fun and for the learning experience. Now I want to further that learning experience. It seems to me that ray tracing is a prime candidate for parallel processing, which is something I have very little experience in. My question is this: how do I know the optimum number of concurrent processes to run? My first instinct tells me: it depends on how many cores my processor has, but like I said I'm new to this and I may be neglecting something.

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• Flowmotion Running on Ubuntu Server [migrated]

  - by Thomas Egan

  I am trying to configure Flowmotion to work on my Ubuntu Server. At present I use LAMP to serve pages from a Virtualbox installation. I will be moving this to a dedicated server but would like to enable true streaming of videos using this installation. I am only interested in open source streaming for a research project and although I have installed Flowmotion via apt-get I don't know how to start the service so that embedded videos located on the server will stream. Can anybody provide any information regarding this or online resources I may have missed? I have checked the documentation however if appears far too complex. Just clarify I'm running VirtualBox 4.2.1 on Mac OSX 10.6.8 and Ubuntu Server 12.06 64-bit

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• Joining and compressing all javascript files together - good idea?

  - by Tomáš Zato

  Curently, I avoid loading any unnecesary scripts on individual pages of my site. I have a class that remembers all javascript files that were requested during PHP processing and adds them to HTML. I was just thinking that I could merge the current set of files, save the result in special directory and let the browser download just one, big file. Since the number of possible combinations is not very high, I would end up with about 10 combined files for different pages. I've never seen that on any site. What are the reasons not to do it? I need very fast page load.

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• Can't upgrade 11.04: flashplugin-nonfree: Package is in very bad, inconsistent state

  - by Ondra Žižka

  I can't upgrade from 11.04. I've disabled all apt sources, but still I get: http://img715.imageshack.us/img715/6680/snmekobrazovkyg.png The only option I am capable doing is to format and reinstall whole system, which I don't prefer as I have tuned a lot of apps settings, etc. How can I fix this? Update: After restart, when trying to update all packages, I get this error: installArchives() failed: dpkg: error processing flashplugin-nonfree (--remove): Package is in very bad, inconsistent state - before trying to remove rather reinstall it. Reinstalling it results in the same error.

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• What is wrong with my JPGEncoder

  - by hitek

  Here is my code if (event.target.content is Bitmap) { infotext.text = "got something"; var image:Bitmap = Bitmap(event.target.content); var bitmapData:BitmapData = image.bitmapData; this.addChild(image); var j:JPGEncoder = new JPGEncoder(100); var bytes:ByteArray = new ByteArray(); bytes=j.encode(bitmapData); } else { throw new Error("What the heck bob?"); } When I run a debug session everything works fine till it reaches to the line bytes=j.encode(bitmapData); after that nothing happens and my program just goes into limbo Please help

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• 1136: Incorrect number of arguments. Expected 0.? AS3 Flash Cs4 (Round 2)

  - by charmaine

  (I have asked this before but I dont think I was direct enough with my question and therefore it did not get resolved so here goes again!) I am working through a book called Foundation Actionscript 3.0 Animation, making things move. I am now on Chapter 9 - Collision Detection. On two lines of my code I get the 1135 error, letting me know that I have an incorrect number of arguments. I have highlighted the two areas in which this occurs with asterisks: package { import flash.display.Sprite; import flash.events.Event; public class Bubbles extends Sprite { private var balls:Array; private var numBalls:Number = 10; private var centerBall:Ball; private var bounce:Number = -1; private var spring:Number = 0.2; public function Bubbles() { init(); } private function init():void { balls = new Array(); ***centerBall = new Ball(100, 0xcccccc);*** addChild(centerBall); centerBall.x = stage.stageWidth / 2; centerBall.y = stage.stageHeight / 2; for(var i:uint = 0; i < numBalls; i++) { ***var ball:Ball = new Ball(Math.random() * 40 + 5, Math.random() * 0xffffff);*** ball.x = Math.random() * stage.stageWidth; ball.y = Math.random() * stage.stageHeight; ball.vx = Math.random() * 6 - 3; ball.vy = Math.random() * 6 - 3; addChild(ball); balls.push(ball); } addEventListener(Event.ENTER_FRAME, onEnterFrame); } private function onEnterFrame(event:Event):void { for(var i:uint = 0; i < numBalls; i++) { var ball:Ball = balls[i]; move(ball); var dx:Number = ball.x - centerBall.x; var dy:Number = ball.y - centerBall.y; var dist:Number = Math.sqrt(dx * dx + dy * dy); var minDist:Number = ball.radius + centerBall.radius; if(dist < minDist) { var angle:Number = Math.atan2(dy, dx); var tx:Number = centerBall.x + Math.cos(angle) * minDist; var ty:Number = centerBall.y + Math.sin(angle) * minDist; ball.vx += (tx - ball.x) * spring; ball.vy += (ty - ball.y) * spring; } } } private function move(ball:Ball):void { ball.x += ball.vx; ball.y += ball.vy; if(ball.x + ball.radius > stage.stageWidth) { ball.x = stage.stageWidth - ball.radius; ball.vx *= bounce; } else if(ball.x - ball.radius < 0) { ball.x = ball.radius; ball.vx *= bounce; } if(ball.y + ball.radius > stage.stageHeight) { ball.y = stage.stageHeight - ball.radius; ball.vy *= bounce; } else if(ball.y - ball.radius < 0) { ball.y = ball.radius; ball.vy *= bounce; } } } } I think this is due to the non-existance of a Ball.as, when reading the tutorial I assumed it meant that I had to create a movie clip of a ball on stage and then export it for actionscript with the class name being Ball, however when flicking back through the book I saw that a Ball.as already existed, stating that I may need to use this again later on in the book, this read: package { import flash.display.Sprite; public class Ball extends Sprite { private var radius:Number; private var color:uint; public var vx:Number=0; public var vy:Number=0; public function Ball(radius:Number=40, color:uint=0xff0000) { this.radius=radius; this.color=color; init(); } public function init():void { graphics.beginFill(color); graphics.drawCircle(0, 0, radius); graphics.endFill(); } } } This managed to stop all the errors appearing however, it did not transmit any of the effects from Bubbles.as it just braught a Red Ball on the center of the stage. How would I alter this code in order to work in favour of Bubbles.as? Please Help! Thanks!

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• Hadoop:Only master node does the work

  - by user287722

  I've setup a Hadoop 2.2 cluster with 1 master node(namenode and secondary namenode) and 3 slave nodes(datanode and namenode on each one).All of the machines use Linux Mint 64bit. When I run my MapReduce program, writen in Java, I can only see that master node is using extra CPU and RAM. Slave nodes are not doing a thing. I've checked the logs from all of the namenodes and there is nothing wrong with the namenodes on slave nodes. Resource Manager is running and all of the slave nodes can see the Resource Manager. I used this http://n0where.net/hadoop-2-2-multi-node-cluster-setup/ tutorial to configure my nodes. Datanodes are working in terms of distributed data storing but I can't see any indication of distributed data processing. Do I have to configure the xml configuration files in some other way so all of the machines will process data while I'm running my MapReduce Job?

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• Leveraging Existing ERP Systems to Support Environmental Accounting and Reporting

  Organizations globally are faced with a complex set of emissions reporting requirements. Driven by country-specific regulatory mandates as well as stakeholder requests for voluntary reporting, companies are under pressure to provide consistent, transparent and accurate collection, measurement and reporting of energy usage and emissions data. In this podcast, you'll year about how the new Oracle Environmental Accounting and Reporting solution extends the capabilities of Oracle E-Business Suite and JD Edwards Financials to enable organizations to track their greenhouse gas emissions and other environmental data against reduction targets, and to obtain accurate, repeatable and verifiable methodologies for greenhouse gas calculation in accordance with global standards and for both voluntary and legislated emissions reporting schemes.

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