211398 - strange behaviour of mouse event handler (like MSIE setCapture)

Status: RESOLVED FIXED

(Core :: DOM: Events, defect)

Description

[Vladimir Kravchenko]

User-Agent:       Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.3.1) Gecko/20030519
Build Identifier: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.3.1) Gecko/20030519

Block element with style="position: absolute" receive mouse events even when
pointer is outside the document.
As far as I understand, it is not provided by DOM.

Here is simple example for 'mousedown' event inside
DIV with style="position: absolute;
http://dwarf.mostcom.ru/~jimson/mousemove.html
Handler inside DIV receive 'mousemove' and 'mouseup' events even if
mouse pointer moved outside browser window (!)

Is it a bug or a feature ?
It work in mozilla 1.3.1, 1.2.1, netscape 7.0 (MS Windows, FreeBSD, Linux).

Reproducible: Always

Steps to Reproduce:
1. open http://dwarf.mostcom.ru/~jimson/mousemove.html
2. try to 'pull' (as drag-n-drop) green box outside browser window
3. look at numbers inside green box

Actual Results:  
astonishment :)

Expected Results:  
Block element should not receive mouse events when pointer leave it.

Comment 1

[Hermann Schwab]

if no mousekey is pressed, it is working, numbers are updated as long as the
pointer is inside the box.

If a mousekey is pressed (Mousedown), there are three cases:

1. mousekey pressed outside of box: ok
   count starts when pointer enters box and stops when pointer leaves box.

2. mousekey pressed outside of window: ?
   count never starts, not when entering or leaving box or window.

3. mousekey pressed inside of box: this bug
   count starts when pointer moves, doesn´t stop on leaving box or window,
   but stops when key is released.

Comment 2

[Boris Zbarsky [:bzbarsky]]

This is already filed, if I recall correctly... please find the original bug report.

Comment 3

[Stefan Borggraefe]

Looks like the patch in bug 53966 fixed this bug, too. Tested with a Linux trunk
build from today.