Add spot drag function for LineChart & spot custom indicator widget
Nobody has claimed this yet.
- Dominant language
- Dart
- Stars
- 7.6k
- Forks
- 2k
- Avg merge
- 9d 1h
- Merged PRs (30d)
- 2
Description
Hello!
First of all, thank you and all contributors for this awesome package,
I want to achieve the following effect:eg

This picture is a screenshot of Steel Series GG。
I referred to some issue:eg
https://github.com/imaNNeo/fl_chart/issues/1508
https://github.com/imaNNeo/fl_chart/issues/1420
https://github.com/imaNNeo/fl_chart/pull/1428
But it didn't solve my problem, can you give me some useful advice?
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the LineChart interaction and custom indicator APIs, then read issues #1508 and #1420 and PR #1428 for existing approaches. Done requires an agreed scope for dragging individual spots and displaying the custom indicator behavior shown in the referenced screenshot, with a reproducible example or test.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- dart, flutter
- Domain
- data-visualization, frontend
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100