330638 - Interruption in delivery of mouse events when dragging SVG elements

Status: RESOLVED INVALID

(Core :: SVG, defect)

Description

[Chris Nokleberg]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1

Drag shapes around *wildly*. It may take a few attempts, but eventually the dragging will appear to freeze and the cursor will change to unavailable (circle with slash). If you let go of the mouse button, the dragging will resume, and you will have to click again to drop the shape.

Each draggable shape is wrapped in a group (g) element. If that wrapping is removed, the problem goes away--see code. Reducing the number of shapes in the drawing also seems to reduce the likelihood of hitting the bug.


Reproducible: Always

Steps to Reproduce:

Comment 1

[Jonathan Watt [:jwatt]]

Attachment: Chris' testcase

Attaching testcase for future.

Comment 2

[Jonathan Watt [:jwatt]]

Confirming. This is very annoying.

Comment 3

[Olli Pettay [:smaug][[e-mail]]]

Attachment: with style="-moz-user-select: none;"

style="-moz-user-select: none;" helps with the problem, at least here.
Which means that for some reason dragging causes some kind of selection in some
cases.

Comment 4

[lhxws]

this problem isn't still solved!!!

Comment 6

[Jan Tošovský]

Attachment: test case - wheel

As it is hard to reproduce described behaviour on the attached test case in my FF4/Win7/64bit, I am adding different one. When you click on the green wheel, rotate it by mouse move, then release the mouse button and repeat these steps several times, sometimes you encounter described problem. When the style is set to "-moz-user-select: none;", I cannot reproduce this issue any more.

Comment 7

[Robert Longson [:longsonr]]

The testcase in comment 6 is invalid as it does not call evt.preventDefault() within the event handlers.

Comment 8

[Robert Longson [:longsonr]]

The original testcase also needs evt.preventDefault() in the event handlers.