All Questions
256
questions
0
votes
2
answers
70
views
How to Pre-Bind Parameters in a Template-Based Event System in C++
I have an event system in my game engine, consisting of two main components: Event and EventCallback.
Event.h:
#ifndef _EVENT_H_
#define _EVENT_H_
#include "EventCallback.h"
#include <...
- 1
0
votes
0
answers
22
views
Getting double callback from Stringvar change when entry widget selection changed
I am trying to write a simple program which involves tracing text from the Entry widget and being passed to function for processing as a float.
The problem I have is if I select the contents of the ...
- 1
0
votes
0
answers
67
views
C++ inlined events undefined during instantiation
I want to create inlined event functions if possible. Storing func pointers in a container isn't a way because they can't be inlined. The code in the event will be called always and I don't want to ...
- 1
1
vote
1
answer
47
views
Digital Micrograph - Callback to return a custom image on CameraAcquire() method
I'm doing some automation tests with Digital Micrograph and I would like to return a custom image from a specific folder when acquiring an image. I couldn't find a clear event in the documentation. Is ...
- 15
0
votes
1
answer
61
views
Unable to return closure from closure due to lifetimes in generic type rust
I'm new to rust and I'm trying to rewrite library from kotlin to rust. It is callback event library. When trying to return closure from another closure it breaks on_event function that registries ...
- 39
1
vote
2
answers
414
views
C++ List of member callback functions
I am going from C development to C++ on the STM32 platform and simply cant find a suitable solution for my problem.
Please have a look at the simplified example code attached to this post.
#include &...
- 36
1
vote
2
answers
82
views
generic callback with data
There is already a very popular question about this topic but I don;t fully understand the answer.
The goal is:
I need a list (read a Vec) of "function pointers" that modify data stored ...
- 9,191
0
votes
2
answers
345
views
Trigger events upwards for custom components
I have a custom made component called CoolButton.
If I involve the component in another component like below, I'd somehow like to trigger the onClick-event, just like if it was a normal button.
A ...
- 194
0
votes
0
answers
182
views
How to execute code after returning view in Yii2
Normally when you call a page in Yii2, pretty much the last thing that happens is that the view is rendered to the end user's screen. I need to run code after this that might take a second or two and ...
- 155
0
votes
1
answer
614
views
C++ Event Dispatcher - callback casting problem
I'm venturing into creating an EventDispatcher using C++ 17 in Visual Studio 2022. Basically I store a string (id) to identify the event and a callback (lambda, function or method of a class) in a ...
1
vote
1
answer
887
views
Node js Child process event emitter vs callbacks
Is there any difference between attaching callbacks or event listeners for child process in nodejs. like -
const execute = require('child-process').exec;
const process = execute('ping -n 1 www.google....
- 111
0
votes
1
answer
752
views
NodeJS, HTTP Request doesn't Call a Callback Sometimes
I'm developing a Request service under Nodejs. I'm using it in production for more than a year and it works fine, however, there are cases when it is stuck. It happens rarely on a particular kind of ...
- 3,353
0
votes
0
answers
44
views
How much memory does consume one notification event in Oracle?
I read an article, titled
Event Monitor Process: Architecture and Known Issues (Doc ID 105067.1):
... In 10.1 onwards the procedures DBMS_AQADM.GET_WATERMARK and
DBMS_AQADM.SET_WATERMARK are ...
- 126
4
votes
1
answer
516
views
Add/remove eventListeners while keeping instance context of "this"
I am trying to use the vanilla JS event system to send events between different components of my browser application (no NodeJS involved), by dispatching events to the window object.
// method in ...
- 580
2
votes
2
answers
3k
views
Blazor components: How to communicate from grandchild to child to parent or grandchild to parent
In my Blazor server app, I have a page called Home that is basically a search page. On the Home page (the "parent") there is a form with controls to filter the data stored in a backend ...
- 23
1
vote
0
answers
350
views
How to get the index of a data point when the cursor clicks on it?
I have a scatter plot and I want to get the initial index of the data sample when clicked on it.
fig, ax = plt.subplots()
sc = plt.scatter(features[:, 0], features[:, 1], c=labels)
On an on-click ...
- 2,248
1
vote
1
answer
729
views
How to narrow callback event type based on event name
I'm trying to implement an event emitter. The code is very simple.
Right now tsc thinks that the event type in eventHandler is 'ErrorEvent' | 'MessageEvent'.
This is the problem and I want tsc to ...
- 3,434
6
votes
1
answer
3k
views
d3.js undefined data value in callback function click event [duplicate]
I'm trying to pass a value to a d3 click event bind to a group composed of a circle and a letter. However this value remains 'undefined' in the callback function. On the other hand if I pass the same ...
- 63
0
votes
1
answer
351
views
How to unsubscribe from Event after a Page disappear
From a viewModel of a page which displays DATA, I need to display a SecondaryPage, with a subset of those DATA. So when the button is clicked, I apply filter to the DATA and call the SecondaryPage. I ...
- 304
0
votes
2
answers
813
views
Receiving data in python callback function from dll
I am writing a program in Python that communicates with a spectrometer from Avantes. There are some proprietary dlls available whose code I don't access to, but they have some decent documentation. I ...
0
votes
1
answer
437
views
Function Pointers as Event Callbacks in a st
I am currently trying to implement an event system where layers can subscribe to certain event types. I am struggling with function pointers for the callback methods. In the layer.h file I have the ...
- 121
0
votes
2
answers
1k
views
D3v6 drag event callback function fire with undefined parameters
Following the D3v6 documentation, i am unable to implement a simple dragging behaviour on a path SVG element drawn using the d3.symbol util. The typescript class is shown here as a context.
The events ...
- 33
3
votes
1
answer
504
views
Listen for event and invoke callback, based on specification?
I am currently building out a custom task manager and I'm wondering if it's possible to tell the task manager to listen for a specific event (OnSomething below), and then invoke a callback method when ...
- 2,892
1
vote
1
answer
1k
views
Passing a function with parameters to a child component
I'm writing blazor component wrappers for some of my favorite Javascript plugins using Javascript interop.
My parent component has this function:
async Task<IEnumerable<DpEvent>> GetEvents(...
- 1,257
1
vote
1
answer
435
views
Benefit of using event listeners over functions callbacks in Matlab
Note: The question here is specifically for the case of Matlab!
The context of this question is a Matlab handle class, which receives some data over a websocket, does some processing to that data and ...
- 13
5
votes
1
answer
4k
views
Event Callback issue parent/child component "does not have a property matching the name 'OnClickCallback'"
The issue
So I have an issue in Blazor where I am trying to invoke a method in my MainLayout parent component from a child component (NavMenu). All I am trying to achieve is to open a dialog in the ...
- 159
0
votes
1
answer
366
views
How to manage events in converse.js xmpp library
Im actually developing a custom ERP for my business company and i need implement xmpp web based chat applicatión using Converse.js.
But i can't find any solution to manage events callback's with the ...
1
vote
1
answer
150
views
Set onclick method for an element in a loop using local variables without having it activate immediately
I have a for loop in which I'm using a local variable from the loop as a parameter for an onclick event callback. I'm doing it according to what I've read in these posts:
Passing parameter onclick, ...
- 2,020
0
votes
1
answer
474
views
How to draw free and horizontal lines using mouse events and flags?
I try to build a code, in which I can draw lines above the image using OpenCV. In my code, I can draw lines freely, but I want draw horizontal lines, while I'm pressing the shift key. Actually, I didn'...
- 139
0
votes
0
answers
388
views
Get Callback From Custom Attribute Tagged Functions [C#]
I have a custom attribute that can be applied to methods. How would I go about getting a callback when a tagged function is called?
class RPC : Attribute
{
private string RPCName;
public ...
- 83