getredash/redash

Pie charts has issues with rendering legends for long series names

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#1158 opened on Jun 26, 2016

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BugFrontendVisualizations: Charthelp wanted

Description

Example: http://demo.redash.io/queries/2008/source#2681

Sometimes the legend is empty and sometimes it is drawn on top of the pie chart itself.

Contributor guide

Tech stack
javascript
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
basic JavaScriptunderstanding of chart rendering
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
The issue describes pie chart legends being empty or overlapping the chart when series names are long. Start by examining the pie chart component in Redash's frontend, likely in the client/app/visualizations directory. Look for legend rendering logic, possibly in a file like PieChart.js or similar. Check if there are any CSS overflow or positioning issues. The linked example might help reproduce the problem.