All Questions
256
questions
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
812
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