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d3 / d3-drag

Drag and drop SVG, HTML or Canvas using mouse or touch input.

Home Page:https://d3js.org/d3-drag

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Is React compatible with d3-drag?

alexung opened this issue · comments

commented

My situation is that I have multiple polylines/polygons with circles at each point, and when I click a circle I'd like the polyline to move appropriately. I don't have any id's/className's on any polyline, and the circles are being caught via d3.event.

I have a version of this working (somewhat) at the moment but there are few issues:

  1. My cursor, if moving too fast, will stop dragging the previously-dragged circle
  2. The circle, if it gets too close to another point with a circle on it, will stop moving the point that I was originally moving and instead move the point that I'm close to.
  3. Sometimes, circles are completely dragged off the line and unable to rejoin the line.

screen shot 2017-09-25 at 7 47 00 pm

I'm confused about how to get drag and drop to work with d3/react and if this is even a potentially fruitful pursuit. Would appreciate some help.

commented

If the drag behavior is only listening to your circles, then if the mouse “escapes” a circle, you’ll stop receiving mouse events and drag will stop. So typically you need to put something in the background to capture mouse events, such as a rect with fill: none and pointer-events: all.

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