71458 - Scrollbars don't adjust to new mouse position while in a page scroll

Status: VERIFIED DUPLICATE of bug 153946

(Core :: XUL, defect)

Description

[:deanis74]

1. Go to a long page, such as http://mindprod.com/unmain.html
2. Click-and-hold on the scrollbar about half-way down.
3. Page starts scrolling.
4. While still holding down the mouse button, move down to near the bottom of
   the scrollbar area.
5. Wait

Expected Results: Scrolling continues to the new mouse position

Actual Results: Scrolling stops at the original mouse position

Build: 2001030804

This is near-dogfood for me.

Comment 1

[Peter Trudelle]

->evaughan/p4.  What you expect is correct behavior on Win/Mac; Linux scrollbars
just keep scrolling as long as the mouse is down (regardless of where), but I
think that is just wrong.

Comment 2

[:deanis74]

I took a look at this, and the main stumbling block I ran into is that 
nsSliderFrame::HandleRelease gets called in NS_MOUSE_EXIT_SYNTH processing as 
soon as the thumb passes under the pointer.

If I could figure out how to tell if the mouse button is pressed or not, I could 
get through this.  Happen to know if there's such a function?

Comment 3

[:deanis74]

Filed bug 78248 to expose an API to determine if a mouse button is pressed.

Comment 4

[Jesse Ruderman]

*** Bug 31490 has been marked as a duplicate of this bug. ***

Comment 5

[:deanis74]

Sweet, caillon fixed this!  Care to verify the dupe?

*** This bug has been marked as a duplicate of 153946 ***

Comment 6

[Christopher Aillon (sabbatical, not receiving bugmail)]

Doh.  I really did look for duplicates but couldn't find this bug.  Verified.