bitovi/jquerypp

Window moves underneath the cursor when starting a drag with representative()

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#127 opened on Oct 5, 2016

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 (1 comment) (0 reactions) (0 assignees)JavaScript (1,219 stars) (167 forks)batch import
bughelp wanted

Description

When I use representative() to make an element draggable by just its child, the window jumps underneath the cursor such that the window’s top-left corner is under the cursor.

Demo: http://jsfiddle.net/eveLzaaw/2/ representative bug

Contributor guide

Tech stack
javascripthtmlcss
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.
1-3 hours
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.
clear
Prerequisites
Basic jQuery knowledgeUnderstanding of drag events
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40
Research direction
The issue demonstrates a bug where the window jumps to the cursor when starting a drag using representative(). Investigate the drag event handling in jquerypp, particularly the representative() method and how it sets the drag origin. The provided jsfiddle and gif show the undesired behavior. Look at the source code for drag events (likely in /event/drag/) to understand how the initial position is calculated and why it might be offset incorrectly.