Event handling is a coding pattern related to acting on messages between a source and one or more subscribers. A point listener in the source provides a way in which subscribed code can consume messages raised from the source.
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Simple Pub-Sub Event Emitter
I have written a basic event emitter in JavaScript and I'd like some feedback on my design. I tried to make it as simple and minimalist as possible, as I'd like it to be understandable by anyone.
I ...
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0answers
9 views
psql event store
Below are a couple of different files that comprise of example code for a postgres event store, where rows for one main table events are created, as well as a ...
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1answer
15 views
JavaScript idle managing structure
I am just getting into the world of javascript, coming from the world of classical inheritance. The following is a library I wrote to track when a webapp is idling and I wrote it like I write ...
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1answer
57 views
Java application processing GUI input when “Done” is clicked
Right now, I've got this really ugly loop in my code that waits for a boolean to be true before the method can return. It's triggered when "Done" is clicked. I'm ...
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56 views
C++ Event Emitter
I needed an event bus in C++ with a few features:
Possibility to add/remove both functions and member methods.
Ability to remove automatically those listeners that wrap member methods of expired ...
1
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1answer
64 views
Simple type-safe and thread-safe Rust event system
I'm creating a relatively simple type-safe and thread-safe Rust event system. It is to be used with and within an IRC library I'm making, but should work just fine for other use-cases. It needs to be ...
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2answers
33 views
delegate click event on document
I'm adding an onclick listener to the whole document then checking the source of the click. If the source of the click contains the attribute data-widget I want to ...
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72 views
Recorder for keyboard and mouse events
I'm building an event recorder. So far the code looks clean, but I feel like I'm missing something that can make this code even better.
Is composition a better solution? If yes, how can I do it ...
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1answer
62 views
Focus next element on keypress
It's been a year or two since I last dabbled in jQuery and have attempted to write a simple "on key press move to the next element" script. However my first attempt has a lot a repetition. I just ...
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0answers
29 views
Event Service in c++
I'm interested in receiving some feedback regarding an Event system that I wrote. Both in style and implementation, but also in overall design and the design decisions that I made.
It is intended to ...
3
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1answer
107 views
Event delegation without jQuery
I created event delegation like concept which is present in jQuery. AFAIK, event delegation is used to register an event for an element which is supposed to be added dynamically. So, in jQuery we do ...
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1answer
56 views
PageVisibility API, to handle page/tab visibility changes
Currently, I'm working on a project where I needed to run some code everytime the page is hidden.
I searched high and low and found this question: Is there a way to detect if a browser window is not ...
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37 views
Event Delegates using IIFE or Module
I am learning jQuery/JavaScript best practices and am attempting to put them into practice. My overall goal is to have lots of small, independent .js files which contain specific functionality and ...
5
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2answers
253 views
Yet another event dispatcher in c++11
I've written an event dispatcher for a private project which task is to collect events from different threads and dispatch them in a single thread:
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1answer
77 views
Overriding the mouseout handler for an image when a button is clicked
I had posted this question in Stack Overflow and they told me it would be better served on Code Review.
Is there a more effecient way of changing the mouseout state when a button is clicked? When a ...
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1answer
112 views
C++11 event system
I've implemented an events system in C++11. I've now got it pretty much as good as I can get it. It feels like I have found an optimal design pattern, and I'm using sensible variable names to ...
1
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2answers
52 views
Keyboard handler for moving in four directions
I'm having trouble deciding if I should leave the default: break; in the switch statement or not. It does kinda show intent, i.e. that most keys are not handled, ...
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2answers
66 views
Keyboard handler to move a shape in response to arrow keys
I finished Codeacademy and I'm looking to practice and get better at JavaScript. Is this coded correctly or should I have made a function for it somehow? The purpose of this code is to move a square ...
2
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2answers
68 views
Keyboard handler for selecting radio buttons
I have got my JavaScript working as seen here:
https://jsfiddle.net/yLg1qs04/3/
But how do I condense/shorten it so that it's not repeating itself so often and taking up so many lines?
...
5
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2answers
225 views
Type-Safe Event System
I have recently started writing C# from a strong JavaScript background, and found myself wanting to do something I do all the time in JavaScript: events.
Since I have a type system at my disposal, I ...
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1answer
89 views
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2answers
97 views
Raise an event (sample 1)
I'm writing tutorials for new programmers. The tutorials show programmers how to structure events.
I've attached the code for one of the tutorials. Can someone take a look at my code and let me know ...
6
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1answer
215 views
C++14 Event System
I've created a simplified event system for C++14. The code is commented, so it shouldn't be hard to read. There's also a simple usage scenario below.
It is still a work in progress and uses some ...
3
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2answers
130 views
Removing all delegates from an event dispatcher
Given a class which is an event dispatcher whose underlying store is a dictionary of events whose key is the event type ...
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0answers
26 views
A cross browser and backwards compatable solution to the PointerEvent, MouseEvent, & TouchEvent
I came up with this solution and I'm very happy with how it turned out. However, I would love some feedback from experienced developers as to its efficiency. I am working heavily with touch and mouse ...
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0answers
47 views
Alternative to clicklistener inside an anonymous class
For a trivial word game, I wrote the following code for the player to choose one of the two choices of words that in turn were read from a sentence.
My question lies in first in the click-listener of ...
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2answers
101 views
Toggling dropdowns using jQuery, with binding and unbinding
This code is used to toggle some dropdowns. I've added the click event on the document to close the dropdown on click outside, but I'm not sure if I'm doing it the right way. I want it to be optimized ...
3
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0answers
30 views
Periodically monitor if record is not updated using Node, Event and setTimeOut
Here is my scenario:
Every user checks in every five minutes.
If some user doesn't check in after 5 minutes, I should be able to keep track of it.
If some user doesn't check in N number of times, an ...
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1answer
34 views
Three identical AJAX button handlers in three views
In my Rails 4 app I have this event listener:
...
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2answers
169 views
Handling events in a multi threaded environment
I have a service that raises multiple events, some of them can be raised at the same time. I need to process those events and run a potentially long running method based on the event arguments.
What I ...
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1answer
76 views
Form validation using IIFE and closure [closed]
Problem statement
Write an IIFE in which we have to validate the input provided from a form using closures. The form consists of name, email, phone, address in which name, email and phone ...
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3answers
50 views
Track mouse coordinates
Problem Statement
Write a JavaScript program that prints the mouse coordinates in a text area when the mouse cursor is moved over the HTML document.
Expected Output
Solution
...
7
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3answers
117 views
Downloading files from a Mozilla file server via FTP
All classes on GitHub repo
This is the code for downloading files from a FTP-server running Mozilla Fileserver.
FtpItem is the interface for the two classes ...
4
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2answers
63 views
C++ EventHandler class, invoking & arguments
This is my EventHandler class, which is extremely simple and can be used on lambdas and similar:
...
5
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3answers
115 views
Detect how long an HTML button is pressed
I recently had the need to detect how long a button is pressed and perform different actions based on that. I found some examples on Stack Overflow, but the ones I looked at showed how to use ...
2
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1answer
33 views
Handler for bidirectional unit conversion form
Building a form where values can be entered in either pounds or kilos.
Script is...
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3
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1answer
96 views
Animating sprite without libraries
I'm building a small game in pure JS for my own learning purposes, using sprites to model players.
Before I go further, I want to try to get the animation down. The below code should produce a blank ...
2
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2answers
96 views
Xml messages processing networkstream [closed]
I'm currently processing xml messages with C#. It is working But I'm not confident that my code is fast enough. There are 3 possible messages I can receive. When I receive one the message an event is ...
2
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2answers
119 views
Using actionPerformed() to call different methods per radio button selection
My Java is very rusty and I have been unlucky finding a better way to accomplish this task. I have two different methods which get called based on which radio button is selected. Is there a cleaner ...
4
votes
2answers
87 views
Pub/Sub in JavaScript
This seems to work, but for some reason I'm not entirely sure about it.
Can anyone point out any issues with this simple pub/sub library?
Thank you!
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5
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0answers
235 views
Implementing my own signal slot mechanism using C++11
I programmed in C# and I used the Qt framework. Both of them have their own signal slot mechanism which are really powerful. I looked at several implementations in C++ and based on what I learnt from ...
4
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2answers
112 views
Designing a Backspace key
I have designed a Backspace button (part of a keyboard which I am designing) in windows forms and it works perfect with no errors (the code works very good). This button deletes what is inside the ...
3
votes
2answers
91 views
Custom event handler in Javascript
In my web projects I often need a simple way to trigger callbacks defined somewhere else. Leaving jQuery finally behind me, I was missing their simple event system and tried to create my own. I'd like ...
2
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0answers
313 views
C++ 14 event bus implementation
The code allows you to subscribe to events and publish events via an EventBus class. Events are identified by a source and subject. Events can have a single ...
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1answer
177 views
Event dispatcher / listener
I'm working on a program that will be significantly multi-threaded. I need to respond to events between objects and threads so I've come up with the following code.
...
6
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2answers
242 views
1
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1answer
50 views
Javascript event handling via switch
The application I am developing with has many input fields that interact with one another via the onchange event.
When developing started, the goal was to create a framework that makes it easy to ...
4
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1answer
116 views
C++ EventHandler Class
I need to have some thread-safe event handler (like C#'s EventHandler), so I made one. Here is my event handler class and sample code (compiled with VS2013). Is ...
6
votes
1answer
123 views
Custom Event System in C#
I'm currently writing a game and want to encode everything that happens (GameObject has moved, hp changed, was created/destroyed, got/lost a component, ...) in Events that look like this:
...
4
votes
1answer
121 views
Angular wrapper for SignalR event aggregator
I created a little wrapper for one of my JavaScript libraries to enable Angular functionality. Are there any pitfalls I should be wary of with my code?
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