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  • GWT removeHandler on first event notification

    - by Keith
    I want to remove a GWT event handler the first time I receive an event. I also want to avoid polluting my class with tracking registration objects that aren't really necessary. I currently have it coded as: final HandlerRegistration[] registrationRef = new HandlerRegistration[1]; registrationRef[0] = dialog.addFooHandler(new FooHandler() { public void onFoo(FooEvent event) { HandlerRegistration removeMe = registrationRef[0]; if(removeMe != null) { removeMe.removeHandler(); } // do stuff here } }); but the use of registrationRef makes the code less readable. Is there a better way to do this without adding variables to my class?

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  • idiomatic property changed notification in scala?

    - by Jeremy Bell
    I'm trying to find a cleaner alternative (that is idiomatic to Scala) to the kind of thing you see with data-binding in WPF/silverlight data-binding - that is, implementing INotifyPropertyChanged. First, some background: In .Net WPF or silverlight applications, you have the concept of two-way data-binding (that is, binding the value of some element of the UI to a .net property of the DataContext in such a way that changes to the UI element affect the property, and vise versa. One way to enable this is to implement the INotifyPropertyChanged interface in your DataContext. Unfortunately, this introduces a lot of boilerplate code for any property you add to the "ModelView" type. Here is how it might look in Scala: trait IDrawable extends INotifyPropertyChanged { protected var drawOrder : Int = 0 def DrawOrder : Int = drawOrder def DrawOrder_=(value : Int) { if(drawOrder != value) { drawOrder = value OnPropertyChanged("DrawOrder") } } protected var visible : Boolean = true def Visible : Boolean = visible def Visible_=(value: Boolean) = { if(visible != value) { visible = value OnPropertyChanged("Visible") } } def Mutate() : Unit = { if(Visible) { DrawOrder += 1 // Should trigger the PropertyChanged "Event" of INotifyPropertyChanged trait } } } For the sake of space, let's assume the INotifyPropertyChanged type is a trait that manages a list of callbacks of type (AnyRef, String) = Unit, and that OnPropertyChanged is a method that invokes all those callbacks, passing "this" as the AnyRef, and the passed-in String). This would just be an event in C#. You can immediately see the problem: that's a ton of boilerplate code for just two properties. I've always wanted to write something like this instead: trait IDrawable { val Visible = new ObservableProperty[Boolean]('Visible, true) val DrawOrder = new ObservableProperty[Int]('DrawOrder, 0) def Mutate() : Unit = { if(Visible) { DrawOrder += 1 // Should trigger the PropertyChanged "Event" of ObservableProperty class } } } I know that I can easily write it like this, if ObservableProperty[T] has Value/Value_= methods (this is the method I'm using now): trait IDrawable { // on a side note, is there some way to get a Symbol representing the Visible field // on the following line, instead of hard-coding it in the ObservableProperty // constructor? val Visible = new ObservableProperty[Boolean]('Visible, true) val DrawOrder = new ObservableProperty[Int]('DrawOrder, 0) def Mutate() : Unit = { if(Visible.Value) { DrawOrder.Value += 1 } } } // given this implementation of ObservableProperty[T] in my library // note: IEvent, Event, and EventArgs are classes in my library for // handling lists of callbacks - they work similarly to events in C# class PropertyChangedEventArgs(val PropertyName: Symbol) extends EventArgs("") class ObservableProperty[T](val PropertyName: Symbol, private var value: T) { protected val propertyChanged = new Event[PropertyChangedEventArgs] def PropertyChanged: IEvent[PropertyChangedEventArgs] = propertyChanged def Value = value; def Value_=(value: T) { if(this.value != value) { this.value = value propertyChanged(this, new PropertyChangedEventArgs(PropertyName)) } } } But is there any way to implement the first version using implicits or some other feature/idiom of Scala to make ObservableProperty instances function as if they were regular "properties" in scala, without needing to call the Value methods? The only other thing I can think of is something like this, which is more verbose than either of the above two versions, but is still less verbose than the original: trait IDrawable { private val visible = new ObservableProperty[Boolean]('Visible, false) def Visible = visible.Value def Visible_=(value: Boolean): Unit = { visible.Value = value } private val drawOrder = new ObservableProperty[Int]('DrawOrder, 0) def DrawOrder = drawOrder.Value def DrawOrder_=(value: Int): Unit = { drawOrder.Value = value } def Mutate() : Unit = { if(Visible) { DrawOrder += 1 } } }

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  • Dequeue notification table in Oracle

    - by user171523
    I have implemented below sample. It is working fine. I am planning to integrate with this .net application. As soon i read the entry i would like to dequeue the entry. Can any one tell how i can achive that. http://www.oracle-base.com/articles/10g/dbms_change_notification_10gR2.php Meanwhile i am trying AQ. But it does not have good .net (C#)support

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  • TimeZone change to UTC while updating the Appointment

    - by Firoz Ansari
    I am using EWS 1.2 to send appointments. On creating new Appointments, TimeZone is showing properly on notification mail, but on updating the same appointment, it's TimeZone reset to UTC. Could anyone help me to fix this issue? Here is sample code to replicate the issue: ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP1, TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time")); service.Credentials = new WebCredentials("ews_calendar", PASSWORD, "acme"); service.Url = new Uri("https://acme.com/EWS/Exchange.asmx"); Appointment newAppointment = new Appointment(service); newAppointment.Subject = "Test Subject"; newAppointment.Body = "Test Body"; newAppointment.Start = new DateTime(2012, 03, 27, 17, 00, 0); newAppointment.End = newAppointment.Start.AddMinutes(30); newAppointment.RequiredAttendees.Add("[email protected]"); //Attendees get notification mail for this appointment using (UTC-05:00) Eastern Time (US & Canada) timezone //Here is the notification content received by attendees: //When: Tuesday, March 27, 2012 5:00 PM-5:30 PM. (UTC-05:00) Eastern Time (US & Canada) newAppointment.Save(SendInvitationsMode.SendToAllAndSaveCopy); // Pull existing appointment string itemId = newAppointment.Id.ToString(); Appointment existingAppointment = Appointment.Bind(service, new ItemId(itemId)); //Attendees get notification mail for this appointment using UTC timezone //Here is the notification content received by attendees: //When: Tuesday, March 27, 2012 11:00 PM-11:30 PM. UTC existingAppointment.Update(ConflictResolutionMode.AlwaysOverwrite, SendInvitationsOrCancellationsMode.SendToAllAndSaveCopy);

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  • CollectionChanged notification across threads?

    - by Mark
    I'm writing a download manager using C#/WPF, and I just encountered this error: This type of CollectionView does not support changes to its SourceCollection from a thread different from the Dispatcher thread. The basic flow of my program is that a few web pages/downloads are enqueued at the start, and then they're downloaded asynchronously. When an HTML page has completed downloading, I parse it and look for more stuff to download, then enqueue it directly from within the worker thread. I get that error when trying to send out the CollectionChanged event on my customized queue class. However, I need to fire that event so that the GUI can get updated. What are my options?

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  • Javascript to show in other page

    - by Irwan
    I have index.php to auto refresh div with jquery (sucess) function jin_ajax_loop() { // url and target jin_ajax_req('inbox.php','div_test'); } < body < div id="div_test" < /div < /body and then inbox.php to show notification: im using snotify from http://www.gayadesign.com/diy/snotify-easy-notifications-in-jquery/ '--------------------------------------------------------------------------------------- < script type='text/javascript' src='js/jquery.min.js'< /script" < script src="js/sNotify.js" type="text/javascript"< /script < script type="text/javascript" sNotify.addToQueue("Test"); < /script '--------------------------------------------------------------------------------------- And I want to show this notification sNotify.addToQueue("Test") in index.php Ho I do? Thanks

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  • user notification while waiting

    - by user315445
    I am writing a simple win forms app in C#. There is a method call in my method which loads files but is taking a while to respond. Below is the method call Directory.GetFiles(selectedFolder, "*.xml", SearchOption.AllDirectories); I want to notify this to users. Is there a way to show them that file loading is in progress? I want a simplest way. I suppose Splash screen is too costly for my app.

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  • How to get notification of workflow errors?

    - by Greg McGuffey
    I am having issues were a workflow is stalled because there is an issue with sending an email (send email activity). Typically, this is simply solved by resuming the workflow. I'm wondering if there any way to react to a workflow error, so the user knows they need to go in and resume the workflow. I'm also wondering about this relative to a workflow that is attempting to assign a task to a user who no longer exists in the CRM or one that has an invalid email address, which I'm assuming would cause errors in workflows as well. Any other suggestions related to this sort if issue would be welcome. Thanks!

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  • Drupal : Notification of modification to translator of a content

    - by Brice Favre
    Hello, In Drupal, i want to know how to notify translator that the content they translated, was modified. What is the easiest way to do it? Is there a module for that? Maybe workflow can help but i think this needs too much adminsitration Bonus Question : Do you already work with the same language in several countries? Exemple : English US, Englis UK, English CA? Thanks.

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  • Windows Power State change event notification in Qt

    - by Surjya Narayana Padhi
    Hi Geeks, I developing a GUI in QT where I have to show the battery status icon. To get the system power status, I am using the windows API. But to show status anytime , do i need to use a thread to continuously read and display the power status? I am thinking of using event handler. But not sure how to implement. I am thinking that for just one status icon I will run a thread. Anybody has any better suggestion, please share.

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  • Notification icon in the status bar

    - by sairam333
    Hi I am displaying an icon in status bar depending up on my condition .upto this it is ok.Now problem in my application is when i come back to application still the icon is displayed in the status bar.I don't want the icon when i come back from the application.For this give me some suggestions

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  • WPF bound object update notification

    - by Carlo
    I have a TreeView with a few objects bound to it, let's say something like this: public class House { public List<Room> Rooms { get; set; } public List<Person> People { get; set; } public House() { this.Rooms = new List<Room>(); this.People = new List<Person>(); } public void BuildRoom(string name) { this.Rooms.Add(new Room() { Name = name }); } public void DestroyRoom(string name) { this.Rooms.Remove(new Room() { Name = name }); } public void PersonEnter(string name) { this.People.Add(new Person() { Name = name }); } public void PersonLeave(string name) { this.People.Remove(new Person() { Name = name }); } } public class Room { public string Name { get; set; } } public class Person { public string Name { get; set; } } The TreeView is watching over the House object, whenever a room is built / destroyed or a person enters / leaves, my tree view updates itself to show the new state of the house (I omitted some implementation details for simplicity). What I want is to know the exact moment when this update finishes, so I can do something right there, the thing is that I created an indicator of the selected item, and when something moves, I need to update said indicator's position, that's the reason I need it exactly when the tree view updates. Let me know if you know a solution to this. Also, the code is not perfect (DestroyRoom and PersonLeave), but you get the idea. Thanks!

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  • Push alerts to notification tray app in Java

    - by Rich Anderson
    Hi - how do I push server alerts to tray apps in java without using xmpp or other heavy protocols? Do you recommend a way to accomplish this? I was planning to write an app which uses URLConnection on a server equipped with Comet but I doubt if that would work as the client requires a JS to be invoked and URLConnection is not a browser.. What is the best way to push instead of using a proprietary client-server approach?

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  • Push notification or thread with timer

    - by neha
    Hi all, In my application, I'm having functionality like twitter that when you have not refreshed your screen, and if there're new messages then you get this message that "You have n new messages" and a refresh button, which on press will refresh the screen. I'm basically fetching all the data from an xml with some url. In case of thread, I need to call a timer after some time period which might affect the app performance. Can anybody please suggest wheather what will be better to use push notifications or thread with timer? Thanx in advance.

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  • C# Balloon Notification Popup over all other apps

    - by user1114503
    I have a balloon popup (from a notifyIcon) in C# that works perfectly, unless there is a fullscreen application on the users monitor, such as a power point presentation. In that case, the popup doesn't show at all. However, once that app exits or is minimized (or the taskbar brought to front) you can see the balloon popups again. Is there a way to make this popup show over all windows? Something like a form's "Top Most" setting? My code for the balloon is below if anyone needs it. notifyIcon1.BalloonTipText = "Issue found!"; notifyIcon1.ShowBalloonTip(5000); Thank you!

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