dragLine | drag a connection line like in Xcode Interface Builder | Code Editor library

I got a D3v6 graph, which contains a context menu for the nodes. If clicked, its possible to add a link to another node. My problem is the zoom function, which I declared on the root SVG:

I modified my graph to utilize join() instead of enter(), remove() and exit(). Still, I append elements like circle and text elements to my nodeContainer group. In the browser inspector I noticed, my graph appends another circle and text element to an existing node.

I thought join() fix this issue or do I still need to utilize remove(), exit() functions for the appended elements?

Before adding another node:

After addong another node:

I found this http://bl.ocks.org/rkirsling/5001347 graph from bl.ocks.org and want to migrate to D3 v6.

I managed to get running without any syntax errors but the result seems wrong if you click on a node.

I guess the function:

I am new to d3 and I am trying to use this demo It uses v3 and I am trying to migrate it to v5.16.0

What I could do is change d3.behavior.drag(), .origin and .on("dragend" into d3.drag(), .subject and .on("end",

and change this .on("zoomstart" and this .on("zoomend" into this .on("start" and this .on("end"

I am not getting any runtime errors but there is a malfunction. For example I can't mouse click + "shift" to create a new node like in the demo and also when a node is clicked its color doesn't change and also when I drag a node I get this messy behaviour as shown in this image

I could figure out that for some reason the on mouseup event is not fired but I coudn't figure out the reason.

Can someone please help?

New Full code I am using:

I've lurked around here for ages and found a lot of help through other people's questions. But after extensive searching, I couldn't find a post to help me find a solution to a problem that I'm having, so I decided to post my own question here so if it gets answered, it might help someone else in a similar fashion!

I'm having some issues with adding force to my linerenderer. The basic idea is that I have an object that I shoot forward by dragging a line in the opposite direction. Now all that is missing is for the shot to have force that is relative to the length of the "dragline", as in how "strong" the object is pulled. I'm having some trouble with that so I thought I'd ask someone smarter and more experienced than me!

Here is my script to draw the dragline:

I need to draw a connector between two items in a QSceneView. I've subclssed QGraphicsObject for creating this line (it's not a QGraphicsLineItem because I need to update its appearance later). This is the class:

I am migrating this project https://bl.ocks.org/cjrd/6863459 to d3 v4 https://github.com/d3/d3/blob/master/CHANGES.md#dragging-d3-drag

JSFIDDLE https://jsfiddle.net/9wwqgwhh/1/

Canvas is rendering, but there is some kind of problem with dragging. I have to change this code.

I've written a small application that if a user clicks on the screen a node (circle) will appear. If the user then drags from the a node to another node an edge between them will also appear. Both of these update "nodeData" and "edgeData" data structures internally.

The nodes seem to work fine. If the user clicks on the screen, the new node will be added to the data structure and a function "restart()" will be called to update the visualisation. However the edges don't work as I expected. Instead of updating the current edges and appending any new ones to the visualisation, the "restart()" function appends edges again to the visualisation, so that after "restart()" has been called a few times the graph has way too many edges than it should.

Here's the link to the fiddle: https://jsfiddle.net/AlexMarshaall/srL3huk9/4/

I am building a PyQt application which is supposed to receive mouse right-click drags on a QGraphicsView, draw a "lasso" (a line stretching from the drag origin to the mouse position, and a circle at the mouse position), and then, on mouse release, erase the lasso graphics and display an input dialog for the next part of the app.

For some reason, when I use the mouse to click "Ok" on the input dialog, a menu artifact appears on the QGraphicsView which contained the lasso. The menu artifact is a drop-down menu line that says "(check mark) Exit". Occasionally it may be the context menu for one of my custom QGraphicsObjects as well - but for whatever reason, calling the dialog and then clicking "Ok" results in an unintended right-click-like event on the QGraphicsView.

This only seems to happen when the last step before method return is the QInputDialog - replacing it with a pass or a call to some other method does not result in the artifact. I'd be very grateful to anyone with a clue to what is causing this problem!

Here's the minimal code: