callback - w3toppers.com

Matlab: How to get the current mouse position on a click by using callbacks

Define the WindowButtonDownFcn of your figure callback using the set command and an @callbackfunction tag. Like so: function mytestfunction() f=figure; set(f,’WindowButtonDownFcn’,@mytestcallback) function mytestcallback(hObject,~) pos=get(hObject,’CurrentPoint’); disp([‘You clicked X:’,num2str(pos(1)),’, Y:’,num2str(pos(2))]); You can also pass extra variables to callback functions using cell notation: set(f,’WindowsButtonDownFcn’,{@mytestcallback,mydata}) If you’re working with uicontrol objects, then it’s: set(myuicontrolhandle,’Callback’,@mytestcallback)

Callback from Adapter

You need to tell the adapter which implementation of the OnShareClickedListener() to use. Right now in your adapter the field mCallback is never assigned to, either you need to have a setOnSharedClickedListener() method in your adapter which you then call from your mainActivity and set it with the main activity’s implementation or you need to … Read more

using python WeakSet to enable a callback functionality

You cannot create weak references to method objects. Method objects are short lived; they are created on the fly as you access the name on the instance. See the descriptor howto how that works. When you access a method name, a new method object is created for you, and when you then add that method … Read more

Backbone.js Event Binding

jQuery’s habit of setting this to whatever happens to be convenient at the time is a pretty nasty pattern, in my opinion — fortunately, you never have to rely on it: onClick: function(e) { this; // Still the view instance (as it should be). e.target; // The element that was clicked. e.currentTarget; // The element … Read more

jQuery $.ajax(), pass success data into separate function

Works fine for me: <script src=”https://stackoverflow.com/jquery.js”></script> <script> var callback = function(data, textStatus, xhr) { alert(data + “\t” + textStatus); } var test = function(str, cb) { var data=”Input values”; $.ajax({ type: ‘post’, url: ‘http://www.mydomain.com/ajaxscript’, data: data, success: cb }); } test(‘Hello, world’, callback); </script>

sqlite3_exec() Callback function clarification

Let’s assume you have a very simple table called User that looks something like this: ╔════╦══════════╗ ║ ID ║ Name ║ ╟────╫──────────╢ ║ 1 ║ Slvrfn ║ ║ 2 ║ Sean ║ ║ 3 ║ Drew ║ ║ 4 ║ mah ║ ╚════╩══════════╝ And you call sqlite3_exec like this (the arguments are described in detail … Read more

Is there a callback for Twitter’s Tweet Button?

Twitter has Web Intent events for loaded, rendered, resize, tweet, follow, retweet, like, and click. twttr.events.bind( ‘tweet’, function (event) { // Do something there } ); The behavior was changed in the fall of 2015 due to the unreliableness of callbacks happening after an event is complete. They will now be triggered when a user … Read more

How to pass callback in Flutter

This is a more general answer for future viewers. Callback types There are a few different types of predefined callbacks: final VoidCallback myVoidCallback = () {}; final ValueGetter<int> myValueGetter = () => 42; final ValueSetter<int> myValueSetter = (value) {}; final ValueChanged<int> myValueSetter = (value) {}; Notes: VoidCallback is an anonymous function that takes no arguments … Read more

What steps do I need to take to use WCF Callbacks?

Here is about the simplest complete example that I can come up with: public interface IMyContractCallback { [OperationContract] void OnCallback(); } [ServiceContract(CallbackContract = typeof(IMyContractCallback))] public interface IMyContract { [OperationContract] void DoSomething(); } [ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Reentrant)] public class MyService : IMyContract { public void DoSomething() { Console.WriteLine(“Hi from server!”); var callback = OperationContext.Current.GetCallbackChannel<IMyContractCallback>(); callback.OnCallback(); } } … Read more

JavaScript style for optional callbacks

I personally prefer typeof callback === ‘function’ && callback(); The typeof command is dodgy however and should only be used for “undefined” and “function” The problems with the typeof !== undefined is that the user might pass in a value that is defined and not a function