ChartsOrg/Charts

Chart x offset changes when finished zooming in

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#1,880 建立於 2016年11月24日

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 (8 留言) (0 反應) (0 負責人)Swift (28,002 star) (6,009 fork)batch import
help wantedquestion★

描述

I'm seeing a weird behavior when I zoom in my charts.

After I end zooming (which means releasing both fingers) the xAxis offset changes as it moves like 20 chart points to the right of where the zoom ended.

The chart is inside another scrollview, but has only vertical scroll. Also this only happens when the zoom level is really close.. not sure exactly when. My code is pretty much the same as the demo.. only a few changes here and there.

Here's a video with the behaviour I'm seeing https://youtu.be/6ZIJmTyuie4 Any idea on why this is happening or how can I fix it?

貢獻者指南

技術棧
swift
領域
mobile
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-3 hours
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
Basic understanding of iOS developmentFamiliarity with Charts library
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
25
研究方向
Investigate the zoom mechanism in the Charts library. Look at the source files related to chart scaling and translation, such as ChartViewBase.swift or ChartRenderer.swift. The issue likely involves a calculation error when zooming ends. Check if there are any related PRs or comments that discuss similar behavior. Replicate the issue using the demo code with a scrollview to understand the exact conditions.