Unity Issue Tracker - Any window starts resizing when trying to scroll it using the Scrollbar

Fixed in 2020.2.X

Fixed in 2019.4.X, 2020.3.X

Votes

1

Found in

2019.3.0a12

2019.3.10f1

2020.1

2020.2

Issue ID

1240329

Regression

Yes

Any window starts resizing when trying to scroll it using the Scrollbar

IMGUI

Apr 21, 2020

How to reproduce:
1. Open the attached project "1240329.zip"
2. Open the "Test" Scene
3. Try to click and hold the right side of a Hierarchy window scrollbar and move the cursor

Expected result: the scrollbar moves up or down
Actual result: the Hierarchy window starts resizing

Reproducible with: 2019.3.0a12, 2019.3.15f1, 2020.1.0b11, 2020.2.0a13
Not reproducible with: 2018.4.23f1, 2019.3.0a11

Note: the issue is more apparent when using pen input as then the area for resizing seems to be expanded even further

Resolution Note (fix version 2020.2):

Reverting increased picking zones. The issue should not reproduce in Unity 2021.1.0a6 and above.
Resolution Note (fix version 2020.3):

Fixed in 2020,3,16f1
Resolution Note (fix version 2019.4):

Fixed in 2019.4.30f1

Comments (2)

hawken

Sep 21, 2020 08:10

Still apparent in 2019.4.10f1

More than half of the scrollbars width is given to re-sizing ui windows, the mouse icon is an arrow not a re-sizer, which "By Design" is meant to indicate to the user that the window can be drag scrolled using the scroll bar, currently it resizes. This is unexpected behavior for UI in an operating system.
hawken

Aug 25, 2020 08:08

I get this same problem in 2019.4.7f1 with wacom. It's more pronounced with wacom input as we don't have a scrollwheel

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