Bugs item #840767, was opened at 2003-11-12 07:31
Message generated for change (Comment added) made by doug_melvin
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Category: DynAPI 3 API
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: David Haggard (dhaggard)
Assigned to: Nobody/Anonymous (nobody)
Summary: mouse_ie.js null error, with possible patch
Initial Comment:
Background:
Two objects on page (among others, but these seem to
be the "offenders."
1) A single DynLayer with a single assigned
eventListener for mouseover/mouseout, and using the
glideTo method. Used to scroll a navigation menu up and
down at top of page.
2) A form button, disabled by default, with a "title"
attribute set. No onmouseover trap defined for this
button.
Symptom:
On rapid mouseover over the button, javacript error in
line 71 of mouse_ie.js. "null is not an object."
Interesting that this only happened when the mouse
was moving quickly. Never happened with slow mouse
movement.
Lines 70-74 in mouse_ie.js --
----------------------------------
if (e.type=="mouseout" || e.type=="mouseover") {
if (r && (r==src||src.isParentOf(r))) return; //fix for
#15 (ie only)
//if (r&&(r==src.parent||r.isChildOf(src.parent)))
me.bubble=false;
if (r&&(r==src.parent||r.isChildOf(src.parent)))
me.bubble=false;
}
---------------------------------
I eliminated the problem, with no affect on correct
functionality, by changing to this:
Lines 70-76 in mouse_ie.js --
---------------------------------
if (e.type=="mouseout" || e.type=="mouseover") {
if (src != null) { // error handler if src is null
if (r && (r==src||src.isParentOf(r))) return; //fix for
#15 (ie only)
//if (r&&(r==src.parent||r.isChildOf(src.parent)))
me.bubble=false;
if (r&&(r==src.parent||r.isChildOf(src.parent)))
me.bubble=false;
}
}
--------------------------------
May not be the best fix, but it worked for this strange
error. I searched and searched, and never could find
WHY this error was occurring with a form button that is
in no way using the DynAPI.
David Haggard
----------------------------------------------------------------------
Comment By: Doug Melvin (doug_melvin)
Date: 2005-07-21 10:49
Message:
Logged In: YES
user_id=184788
I was experiencing a bug in IE 6 where simply moving the
mouse around would random generate the above error in teh
same code.
This error occurs even when the full extent of you code is
to load the libraries (I.E. no layers created, no event
handlers added.. just load the api and library)
Adding the above mentions fix (checking for src!=null b4
doing stuff to src) fixes this and breaks nothing else as
far as i can tell.
I tested in IE 6 with the mouse event and drag event examples
Could someone please add this fix and post to the cvs.
2 years is long enough for this one imho.
cheers
----------------------------------------------------------------------
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https://sourceforge.net/tracker/?func=detail&atid=105757&aid=840767&group_id=5757
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