Event-driven programming refers to the programming technique where the flow of the program is driven by recognition and handling of events such as mouse clicks, key presses, etc.
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In an event-driven environment, how should a “cancel” function abort all further events?
In my iOS app, things are mostly driven by events.
The user presses a button
The app listens for an external device to be connected to the iOS device
Once the device is detected (is connected), an ...
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1answer
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Automation Approaches: Events/Triggers/Cron [closed]
It has been my experience, when building websites, that most of the logic of a system is executed when user input is accepted, be it via POSTs, GETs etc. I would like to know what processes or ...
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3answers
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How to document events?
Code documentation is usually related to a piece of code, be it small (method-level) or larger (class- or namespace-level). However, it is always about the inputs and the outputs of that piece of ...
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2answers
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Event Driven Programming: A sequence of unfortunate events
I have a very basic game loop whose primary purpose is to check for updates & changes to a list.
I have contemplated using event driven programming to replace the game loop/list idea with an ...
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1answer
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Application protocols and state machines: designing a complicated server
I'm designing and prototyping a server that has the following characteristics:
during the daemon's initialization it spawns nine "manager" servers, each of which solves one part of the overall ...
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Are both the EventAggregator used by ViewModel and Domain Event used by Model the same thing?
My initial doubt was should the Model classes in an MVVM use the EventAggregator or the traditional delegates in C# for events. I searched around and read about the Domain Events. It seems to me that ...
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2answers
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What are the caveats of the event system built on Messenger rather than on classic .NET events?
MVVM Light and PRISM offer messenger to implement event system.
the approximate interface looks like the following one:
interface Messanger
{
void ...
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0answers
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what's the difference between Routed Events and Attached Events? [duplicate]
Possible Duplicate:
What is the difference between routed events and attached events?
I tried to find through various sources but still unable to understand difference between routed events ...
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1answer
62 views
Event system architecture for networking when performance is concerned
How should I design a system for an action game (think in Golden Axe) where events can happen remotely?
I'm using TCP for this because the client is in flash.
There's so many options, I can make a ...
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1answer
265 views
Futures/Monads vs Events
In an application framework
when performance impact can be ignored (10-20 events per second at max),
what is more maintainable and flexible to use as a preferred medium for communication between ...
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1answer
283 views
Thread safe GUI programming
I have been programming Java with swing for a couple of years now, and always accepted that GUI interactions had to happen on the Event Dispatch Thread. I recently started to use GTK+ for C ...
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3answers
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Combining multiple events into one action/ Defer refreshing
So in a GUI program I have multiple events that trigger a update of a workspace. This update call is costly so I would want it to not happen very often.
A user might pick something from a dropdown ( ...
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5answers
223 views
Should I use events in this case?
I'm creating a video player, like a custom YouTube player.
All of the GUI elements (progress bar, video player, play button, ...) are different classes, but I obviously need them to communicate. When ...
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1answer
234 views
event source calls methods in a interface
I am using Java.
How does an event source like a (button in a GUI) knows which method to call in an interface?
For example, I am listening to Mouse Events and have implemented a Mouse Listener ...
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5answers
255 views
Is event chaining considered good practice?
From time to time I've encountered scenarios where several complex conditions need to be met prior to triggering an event. Furthermore, most listeners also run additional checks to determine the ...
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6answers
695 views
How to ease the maintenance of event driven code?
When using an event based component I often feel some pain at maintenance phase.
Since the executed code is all split around it can be quite hard to figure what will be all the code part that will ...
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1answer
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Need to process 2 million 100k messages per second and route them to a particular event, delegate or multicast delegate
I need to process 2 million messages per second (perhaps in a scale out configuration) and route each message to a N delegates or multicast delegates.
Question
How should I structure my application ...
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3answers
327 views
Event driven design and separation of core/UI logic
I am new to event driven development, and I feel lost when I try to implement events that should pass the core/UI boundary.
In my program I have the following (example in c#):
UI.RuleForm ...
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6answers
807 views
Merits of a “Message Passing” system vs. an “Event Based” system
My question is coming from an somewhat uneducated perspective.
What are the relative merits of a "message passing" system vs an "event based" system.
Why would one choose one over the other? What ...
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6answers
545 views
Triggering custom events in AJAX callbacks
I'm pretty new to JavaScript, but one of the things that's been frustrating is that our AJAX callbacks have been getting packed with different functionality, making it difficult to keep everything ...
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2answers
144 views
How to name event types?
Clean code recommends to name methods to be a verb, and classes to be a noun.
I am developing an c++ application using boost::signal as some kind of event framework, and have defined various events, ...
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1answer
477 views
Which notification pattern is preferable?
I'm working on a view model for a view that presents a dialog with export options. The user selects options then clicks Export. When the view model completes the Export, the calling view model ...
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4answers
732 views
Learning event driven programming
I want to learn more about event driven programming. Especially where and why I would consider using events. What resources/books should I consider reading to this end? (note: I'm indifferent to ...
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1answer
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What is the difference between routed events and attached events?
I am just going through the WPF concepts I came across these routed events, dependency properties and attached events.
What are the concepts behind them and why are they called instead of .NET ...
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1answer
327 views
Why are wrapper classes not suited for use in callback frameworks?
I just read the question what are callback frameworks?, where the asker cites the following from Effective Java:
The disadvantages of wrapper classes are few. One caveat is that
wrapper classes ...
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2answers
253 views
Is it true that websites don't need to use an event driven framework given the stateless nature of the web?
I feel like it's critical to use an event driven architecture with a lot of application types that aren't web sites. However, when coding web sites(which are stateless at the most basic level) it ...
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2answers
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Does it makes sense to implement an event dispatching system that allows event bubbling for non GUI related objects?
Following up on this question of mine, where I wanted to know the general principles of implementing an event dispatching system that allows for events to bubble (and capturing I've come to learn); ...
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How does event bubbling generally work and is it synonym to event propagation?
I'm trying to wrap my head around the general workings and principles of event dispatching in event-driven (sub-)systems.
Although I have used it on quite a few occasions in for instance Javascript, ...
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1answer
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How should I keep track of an elements' state within a window/view?
I am trying to implement a view that contains many elements, whose state change depending on the actions you perform on it. I guess this is something that people often run into so I would like to know ...
