Search Results

Search found 19541 results on 782 pages for 'event handling'.

Page 312/782 | < Previous Page | 308 309 310 311 312 313 314 315 316 317 318 319  | Next Page >

• Approaches for memcached sessions

  - by Industrial

  Hi everybody, I was thinking about using memcached to store sessions instead of mySQL, which seemed like a good idea, at first. When it comes to the failover part of utilizing memcached servers, It's a bit worrying that my sessions will stop working if the memcached would go offline. It will certainly affect my users. There's a few techniques that we already utilize to reduce failover, including having a pool of servers available to compensate in the event of downtime, utilizing sharding/consistent hashing across the server pool and so on. We would also do some sort of graceful degradation that tells the users that something have gone wrong and they are welcome to login again, in the event of them being kicked out due to memcached server failover. So how does people generally deal with these issues when storing sessions on memcached servers?

  Read the article

• Tomorrow's web development: What's the bearing?

  - by pex

  I just read a wonderful article about headaches web developers have to live with nowadays. Several questions from that article busied me for some time as well. Now I am wondering whether I missed something, whether there are approaches other than Sproutcore or Cappucino to combine the eternal detached worlds of backend and frontend. How to only write validations once? How to collect business logic in only one model? Are we heading toward a combination of CouchDB Views, NodeJS and minimalistic client-side scripts including plenty of XHR requests? Or shall we follow the direction of handling everything except the database on client side? Is everything about JavaScript? I simply ask for approaches of setting up the next web application, for best practices and promising new technologies and frameworks.

  Read the article

• Is there a language between C and C++?

  - by Robert Martin

  I really like the simple and transparent nature of C: when I write C code I feel unencumbered by "leaky abstractions" and can almost always make a shrewd guess as to the assembly I'm producing. I also like the simple, familiar syntax for C. However, C doesn't have these simple, helpful doodads that C++ offers like classes, simplified non-cstring handling, etc. I know that it's all possible to implement in C using jump tables and the like, but that's a bit wordy at times, and not very type-safe for various reasons. I'm not a fan of the over-emphasis on objects in C++, though, and I'm gun shy of the 'new' operator and the like. C++ seems to have just a few too many hiccups to, for instance, be used as a system programming language. Does there exist a language that sits between C and C++ on the scale of widgets and doodads? Disclaimer: I mean this as purely a factual question. I do not intend to anger you because I don't share your view that C{,++} is good enough to do whatever I'm planning.

  Read the article

• Unable to forward UITouch events to my view controller

  - by hyn

  I have a UISplitViewController setup with a custom view added as a subview of the view (UILayoutContainerView) of split view controller. I am trying to forward touch events from my custom view controller to the master and detail views, but the following (which was suggested here on another thread) seems to have no effect: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; // Do something [self.nextResponder touchesBegan:touches withEvent:event]; } (I couldn't get this formatted properly) As a result my custom view controller locks the events and all the UI underneath never has a chance to do anything. How can I get my master and detail view controllers to receive events?

  Read the article

• remove ViewController from memory

  - by user262325

  hello everyone I hope to load an ViewController and do something then unload it from memory. if (self.vViewController5.view.superview==nil) { ViewController5 *blueController = [[ViewController5 alloc] initWithNibName:@"View5" bundle:nil]; self.vViewController5 = blueController; [self.vViewController5 setDelegate:self]; [blueController release]; } [self presentModalViewController:vViewController5 animated:YES]; later, call [self dismissModalViewControllerAnimated:YES]; but I found that dismissModalViewControllerAnimated does not trigger the event viewDidUnload of Viewcontroller5. I try function release but it caused program collapse. I also try removeFromSuperView but it does not trigger the event ViewDidUnload neither. Welcome any comment Thanks interdev

  Read the article

• How to convert an EntityCollection<T> to List<POCOObj>

  - by ggomez

  I have Entity Framework entities Events which have an EntityCollection of RSVP. I want to convert the EntityCollection of RSVP to a generic List< of a POCO class RSVP. So I want EntityCollection - List. What would be the best way to go about achieving this? So far I have this (it's missing the RSVP part) var events = from e in _entities.Event.Include("RSVP") select new BizObjects.Event { EventId = e.EventId, Name = e.Name, Location = e.Location, Organizer = e.Organizer, StartDate = e.StartDate, EndDate = e.EndDate, Description = e.Description, CreatedBy = e.CreatedBy, CreatedOn = e.CreatedOn, ModifiedBy = e.ModifiedBy, ModifiedOn = e.ModifiedOn, RSVPs = ??? }; Thanks.

  Read the article

• How can I get six Xbox controllers to provide input to an HTML5 game?

  - by Daniel X Moore

  I'm creating a six player HTML 5 game designed to be played locally (Red Ice). I've previous set up handling 7 Wiimotes using something along the lines of Joy2Key to map each input for each player to a separate keyboard key, but Wiimotes are pretty hard on the hands for these types of games and not very ergonomic so I thought I'd try and get Xbox controller support. I don't believe that any simple key mapping solution will work due to the nature of the directional stick. My inclination is that this will require a browser plugin and if so I'd prefer to write the plugin for Google Chrome. How do I create a Chrome browser plugin to handle multiple Xbox controllers or is there some other way? Please do not answer this question saying it can't be done, because it absolutely can. EDIT: I don't believe any keymapping/mouse simulating solution will work unless it can reliably distinguish six axis of inputs, one per player.

  Read the article

• 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.

  Read the article

• How to let parent control know that its child got focus?

  - by Axarydax

  Hi there, imagine that I have a Form with 9 controls (TabbedStuffControl) in a 3x3 tile, and these controls contain TabControls containing another control (StuffControl) with ListBoxes and TextBoxes. I'd like to know a proper way to let TabbedStuffControl that its child has received a focus? e.g. user clicks into a textbox of StuffControl or drags something to listbox of StuffControl. Eventually the Form should know which TabbedStuffControl is active Do I need to hook up GotFocus event of TextBoxes and ListBoxes and TabControls, then dispatch another event to finally let Form know who got focus? I think that there should be a simpler way - that somehow TabbedStuffControl knows that its child got focus, so there would be only one place in code that I'll hook up. Thanks.

  Read the article

• jQuery animation callback not working

  - by Tim

  Hey, if anyone could please help me then it would be much appreciated. Basically, I want to navigate to a new page once this animation has complete. Using the code below, the animation works fine but hen the navigation doesn't happen. Does anyone have any ideas or suggestions? Many thanks, Tim $("a").click(function(event){ event.preventDefault(); var driver = $(this).attr('href'); $(".content-center").animate({height: "0px"}, 500, function(){ navigate(driver); }); });

  Read the article

• ASP.NET Nested Repeater Accessing elements

  - by Rich

  I have a list of Accommodation objects bound to a Repeater, and then a nested Repeater which has the various attendee groups listed [e.g. Default, Seniors, Juniors]. This is all output fine, with the values displayed as LinkButtons, which when clicked gets sent to a code-behind event handler. Here is an example of the output to give you a picture [with some er... interesting attendee group names]: In the event handler, I test the object parameter to see which Repeater has been sent, as the outer repeater's links can also be clicked [so the Accommodation would be set, but no Attendee Group]. Is there a way to get a HiddenField from the outer RepeaterItem that contains the currently clicked inner repeater's LinkButton? E.g. From the image, I click the Attending link in the Women section. So the EventArgs via FindControl can get me the hidden field which contains the Attendee Group's ID, which is good, but I also need the Accommodation ID [to know whether it was either Wimbledon Hotel Inn or New Acc]

  Read the article

• Safari Jquery Dialog and Ckeditor

  - by Mark Milford

  Hi I am using a CKEditor in a Jquery Dialog... and in Safari the first time it loads it works but each subsequent time it is blank and no buttons or anything else works in the ckeditor... I have looked at http://stackoverflow.com/questions/2539855/ckeditor-instance-in-a-jquery-dialog and added the suggested dialog-patch.js but it doesn't help $("#TextDialog").dialog({height:400,width:650, modal:true,closeOnEscape:true, autoOpen:false, open: function(event, ui) { $("#Text").ckeditor(); }, close: function(event, ui) { CKEDITOR.remove($("#Text").ckeditorGet()); }}); That is my code, and it works it all browsers (well Chrome, IE and FF) but not in Safari!

  Read the article

• Fast single thread comet server, possible?

  - by Pepijn

  I recently encountered a few cases where a server would distribute an event stream that contains the exact same data for all listeners, such as a 'recent activity' box. It occurred to me that it is quite strange and inefficient to have a server like Apache run a thread processing and querying the database for every single comet stream containing the same data. What I would do for those global(not per user) streams is run a single thread that continuously emits data, and a new (green)thread for every new request that outputs the headers and then 'merges' into the main thread. Is it possible for one thread to serve multiple sockets, or for multiple clients to listen to the same socket? An example o = event # threads received | a b # 3 o / / # 3 - |/_/ | # 1 o c # 2 a, b | / o/ # 2 a, b o # 1 a, b, c | # connection b closed o # 1 a, c Does something like this exist? Would it work? Is it possible to do? Disclaimer: I'm not a server expert.

  Read the article

• QTest::keyPress is not returning nativeScanCode

  - by vels

  Hi, I am simulating F1 key using QTest::keyPress() method to test keypress event, on simulation of F1 key when i check for nativeScanCode, it returns 0 value. can any one help? //Code snippet //To simulate F1 key press QTest::keyPress(&kboard, Qt::Key_F1); //To check keypress Event void keyboard::keyPressEvent(QKeyEvent* ke) { if ( ke->type() == QEvent::KeyPress ) { QKeyEvent* key_event = static_cast<QKeyEvent *>(ke); //To check F1 key simulation if (key_event->key() == Qt::Key_F1) { int nativeCode = key_event->nativeScanCode(); qDebug()<< nativeCode <<endl; } } } Thanks, vels

  Read the article

• Learning and Developing with PHP [closed]

  - by KyelJmD

  I am here to ask you What is a good PHP Book that doesn't contain too much details but it is compose of all necessary information to develop in PHP such as (OO PHP, Handling Forms, Database etc etc) This may be subjective but I've tried to look php book recomendations here at Stackoverflow but I cannot find any. Next is What are the things I need to know in learning a PHp framework? specifically I want to learn CAKEPHP. NOTE I do not need those lenghty books that discuss loops and such I already have experience programming with java and C#.

  Read the article

• Unique element ID, even if element doesn't have one

  - by Robert J. Walker

  I'm writing a GreaseMonkey script where I'm iterating through a bunch of elements. For each element, I need a string ID that I can use to reference that element later. The element itself doesn't have an id attribute, and I can't modify the original document to give it one (although I can make DOM changes in my script). I can't store the references in my script because when I need them, the GreaseMonkey script itself will have gone out of scope. Is there some way to get at an "internal" ID that the browser uses, for example? A Firefox-only solution is fine; a cross-browser solution that could be applied in other scenarios would be awesome. Edit: If the GreaseMonkey script is out of scope, how are you referencing the elements later? They GreaseMonkey script is adding events to DOM objects. I can't store the references in an array or some other similar mechanism because when the event fires, the array will be gone because the GreaseMonkey script will have gone out of scope. So the event needs some way to know about the element reference that the script had when the event was attached. And the element in question is not the one to which it is attached. Can't you just use a custom property on the element? Yes, but the problem is on the lookup. I'd have to resort to iterating through all the elements looking for the one that has that custom property set to the desired id. That would work, sure, but in large documents it could be very time consuming. I'm looking for something where the browser can do the lookup grunt work. Wait, can you or can you not modify the document? I can't modify the source document, but I can make DOM changes in the script. I'll clarify in the question. Can you not use closures? Closuses did turn out to work, although I initially thought they wouldn't. See my later post. It sounds like the answer to the question: "Is there some internal browser ID I could use?" is "No."

  Read the article

• Tkinter button bind

  - by rejinacm

  Hello, Help urgently.. This is my code: import Tkinter from Tkconstants import * tk = Tkinter.Tk() class MyApp: def __init__(self,parent): self.frame = Tkinter.Frame(tk,relief=RIDGE,borderwidth=2) self.frame.pack() self.message = Tkinter.Message(tk,text="Symbol Disolay") label=Tkinter.Label(self.frame,text="Is Symbol Displayed") label.pack() self.button1=Tkinter.Button(self.frame,text="YES") self.button1.pack(side=BOTTOM) self.button1.bind("<Button-1>", self.button1Click) self.button2=Tkinter.Button(self.frame,text="NO") self.button2.pack() self.button2.bind("<Button-1>", self.button2Click) def button1Click(self, event): "pressed yes" def button2Click(self, event): "pressed no" myapp = MyApp(tk) tk.mainloop() What shall i do in button1Click() and button2Click() so that they return "YES" or "NO" to my program in string format ???

  Read the article

• Streaming files from EventMachine handler?

  - by Noah

  I am creating a streaming eventmachine server. I'm concerned about avoiding blocking IO or doing anything else to muck up the event loop. From what I've read, ruby's non-blocking IO can be used to stream files in a non-blocking way, or I can call next_tick, but I'm a little unclear about which of these approaches is preferable. Part of the problem is that I have not found a good explanation of non-blocking IO library functions in ruby. Short version: Assuming a long-lived network IO operation, several wall clock minutes of streaming per file, transfer, what is the best way to do this in eventmachine without gumming up the event loop? while 1 do file.read do |bytes| @conn.send_data bytes end end I understand that the above code will block and I'm wondering what to put in its place. Also, I cannot use the FileStreamer class that is part of eventmachine as is, because I need to manipulate the data after it's read but before it's sent. Thanks, Noah

  Read the article

• Own help message using optparse

  - by Jay Gridley

  Hi there, is possible to make own help message or attach own event on help option using optparse module in Python?

  Read the article

• Algorithm for waypoint path following?

  - by Thierry Savard Saucier

  I have a worldmap, with different cities on it. The player can choose a city from a menu, or click on an available cities on the world map, and the toon should walk over there. I want him to follow a predefined path. Lets say our hero is on the city 1. He clicks on city 4. I want him to follow the path to city 2 and from there to city 4. I was handling this easily with arrow movement (left right top bottom) since its a single check. Now I'm not sure how I should do this. Should I loop threw each possible path and check which one leads me to D the fastest ... and if I do how do I avoid running in circle forever with cities 1-5-2 ?

  Read the article

• Why are events and commands in MVVM so unsupported by WPF / Visual Studio?

  - by Edward Tanguay

  When creating an WPF application with the MVVM pattern, it seems I have to gather the necessary tools myself to even begin the most rudimentary event handling, e.g. AttachedBehaviors I get from here DelegateCommands I get from here Now I'm looking for some way to handle the ItemSelected event in a ComboBox and am getting suggestions of tricks and workarounds to do this (using a XAML trigger or have other elements bound to the selected item, etc.). Ok, I can go down this road, but it seems to be reinventing the wheel. It would be nice to just have an ItemSelected command that I can handle in my ViewModel. Am I missing some set of standard tools or is everyone doing MVVM with WPF basically building and putting together their own collection of tools just so they can do the simplest plumbing tasks with events and commands, things that take only a couple lines in code-behind with a Click="eventHandler"?

  Read the article

• How to draw a rectangle in WinForm app in the correct location

  - by TooFat

  I have a WinForm app that has an image displayed in a PictureBox that has the added functionality of allowing a user to draw a rectangle on the image by clicking and dragging. The Location, Height and Width of the rectangle are saved to disk. When the image is viewed again I would like to automatically redraw that rectangle in the same position on the image. When I redraw it, however, the Height and Width are fine but the location is always off. The location is being captured in the MouseDown Event like so private void pbSample_MouseDown(object Sender, MouseEventArgs e) { if (SelectMode) { StartLocation.X = e.X; StartLocation.Y = e.Y; //later on these are saved as the location of the rectangle } } And I am redrawing it like so public void DrawSelectedArea(Rectangle rect) { Graphics g = this.PictureBox1.CreateGraphics(); Pen p = new Pen(Brushes.Black); g.DrawRectangle(p, rect); } Given the location from the MouseEventArgs captured during the MouseDown Event how can I calculate the correct location to redraw my rectangle?

  Read the article

• Utilise Surv object in ggplot or lattice

  - by Misha

  Anyone know how to take advantage of ggplot or lattice in doing survival analysis? It would be nice to do trellis/facet like survival graphs. So in the end I played around and sort of found a solution for a kaplan meier plot. Apologize for the messy code in taking the list elements into a dataframe, but I couldnt figure out another way. Note: It only works with two levels of stratum. If anyone know how I can use x<-length(stratum) to do this please let me know (in stata I could append to a macro-unsure how this works in R)... ggkm<-function(time,event,stratum) { m2s<-Surv(time,as.numeric(event)) fit <- survfit(m2s ~ stratum) f$time<-fit$time f$surv<-fit$surv f$strata<-c(rep(names(fit$strata[1]),fit$strata[1]),rep(names(fit$strata[2]),fit$strata[2])) f$upper<-fit$upper f$lower<-fit$lower r<-ggplot (f,aes(x=time,y=surv,fill=strata,group=strata))+geom_line()+geom_ribbon(aes(ymin=lower,ymax=upper),alpha=0.3) return(r) }

  Read the article

• touchesBegan and other touch events not getting detected in UINavigationController

  - by SaltyNuts

  In short, I want to detect a touch on the navigation controller titlebar, but having trouble actually catching any touches at all! Everything is done without IB, if that makes a difference. My app delegate's .m file contains: MyViewController *viewController = [[MyViewController alloc] init]; navigationController = [[UINavigationController alloc] initWithRootViewController:viewController]; [window addSubview:navigationController.view]; There are a few other subviews added to this window in a way that overlays navigationController leaving only the navigation bar visible. MyViewController is a subclass of UIViewController and its .m file contains: - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { for (UITouch *touch in touches) { NSLog(@"ended\n"); } } -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { for (UITouch *touch in touches) { NSLog(@"began\n"); } } I also tried putting these functions directly into app delegate's .m file, but the console remains blank. What am I doing wrong?

  Read the article

• WaitForSingleObject( )

  - by Rakesh Agarwal

  I have got myself stuck into a really amazing issue here.The code is like as below. class A { public: A(){ m_event = CreateEvent(NULL, false, false, NULL); // create an event with initial value as non-signalled m_thread = _beginthread(StaticThreadEntry, 0, this); // create a thread } static void StaticThreadEntry(A * obj) { obj->ThreadEntry(); } void ThreadEntry(); }; void A::ThreadEntry() { WaitforSingleObject(m_event,INFINITE); } int main() { A a; SetEvent(m_event); // sets the event to signalled state which causes the running thread to terminate WaitForSingleObject(m_thread, INFINITE); // waits for the thread to terminate return 0; } Problem : When the above code is run,sometimes( 1 out of 5 ) it hangs and the control gets stuck in the call to WaitforSingleObject()( inside the main function ).The code always calls SetEvent() function to ensure that the thread would terminate before calling Wait() function. I do not see any reason why it should ever hang?

  Read the article

< Previous Page | 308 309 310 311 312 313 314 315 316 317 318 319  | Next Page >