h6ah4i/android-advancedrecyclerview

Collapse groups while dragging

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#200 opened on Mar 1, 2016

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enhancementhelp wanted

Description

Hi

When dragging a group, I'm trying to force closing all groups just before dragging. It's visually unpleasant having the group to cross the childs one by one. So far I can collapseAll in onCheckGroupCanStartDrag, but the user looses the initial dragging gesture. collapseAll cancels the ongoing drag.

Is there a way to have this prettier?

@Override 
public boolean onCheckGroupCanStartDrag(MyGroupViewHolder holder, int groupPosition, int x, int y) {
        ...
        boolean result = ViewUtils.hitTest(dragHandleView, x - offsetX, y - offsetY);
        if (result)
            if (mExpandableItemManager.getExpandedGroupsCount()>0) {
                mExpandableItemManager.collapseAll();
            }
        return result;
    }

Edit: Just notice a duplicate #74

Contributor guide

Tech stack
javaandroid
Domain
mobile
Issue type
feature
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
Android developmentRecyclerView knowledgeJava
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate how to programmatically collapse groups without triggering a drag cancel. Look into the library's drag handling callbacks and consider alternative approaches like delaying collapse after drag start. Refer to duplicate issue #74 for any prior discussion.