Closed
Bug 273495
Opened 20 years ago
Closed 20 years ago
Listbox cannot be programmatically scrolled with the "selectedIndex" property when the "disabled" property is turned on and off before the line setting the "selectedIndex" property to the saved location is executed.
Categories
(Firefox :: General, defect)
Tracking
()
RESOLVED
WORKSFORME
People
(Reporter: arsukdeo, Assigned: bugzilla)
Details
Attachments
(1 file)
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2.17 KB,
text/html
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Details |
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0
A listbox containing N>2 items and having the property SIZE>0 set so that the
subset of viewable items is sufficiently small for there to be hidden items,
then upon capturing the position of a user selected item in the listbox, and
the user scrolls up the list using the scrollbar (the selected item moves down
and becomes hidden), it is not possible to use the "selectedIndex" to scroll
back to the user selected possition, if the "disabled" property is turned ON
and then OFF (setting to true, to prevent another click event while a bit of
code executes, and then to false to allow click events) before the line
containing the "selectedIndex" property.
Reproducible: Always
Steps to Reproduce:
<HTML>
<TITLE>Title</TITLE>
<SCRIPT type="text/javascript">
function setPos()
{
var obj = document.frmObj;
var pos = obj.m_select.selectedIndex;
obj.m_text.value = pos;
if (obj.m_select.length > 0)
{
if (obj.m_select.selectedIndex > 0)
{
obj.m_select.selectedIndex = 0;
obj.m_select.selectedIndex = pos;
}
else
obj.m_select.selectedIndex = 0;
}
}
function doScroll()
{
var obj = document.frmObj;
var pos = obj.m_select.selectedIndex;
if (obj.m_select && obj.m_select.length > 0)
{
obj.m_select.selectedIndex = 0;
obj.m_select.selectedIndex = pos;
obj.m_text.value = obj.m_select.selectedIndex;
}
}
function doDisableScroll()
{
var obj = document.frmObj;
obj.m_select.disabled = true;
//some necessary code in between, that requires the disabling of the listbox
alert("Lisbox is disabled at this point and will be turned back on again.");
obj.m_select.disabled = false;
doScroll();
}
</SCRIPT>
<BODY>
<FORM NAME=frmObj>
<TABLE BORDER=1 style=width:200px">
<TR><TD>OUTSTANDING MOZILLA & FIREFOX BUG:<BR>
</BR>Click on the 2nd to last element, scroll up so that the
highlighted element remains hidden, and then click on the button below to
demonstrate "Failure of Auto-Scrolling To First Element And Back To Selected
Element using 'selectedIndex' and 'disabled' is set to 'true' and 'false'".</TD>
<TD>NOT A BUG: when disabled is not used.</TD>
</TR>
<TR><TD>
<SELECT SIZE=2 NAME=m_select onClick="setPos()">
<OPTION>A</OPTION>
<OPTION>B</OPTION>
<OPTION>C</OPTION>
<OPTION>D</OPTION>
<OPTION>E</OPTION>
<OPTION>F</OPTION>
<OPTION>G</OPTION>
<OPTION>H</OPTION>
<OPTION>I</OPTION>
<OPTION>J</OPTION>
<OPTION>K</OPTION>
<OPTION>L</OPTION>
<OPTION>M</OPTION>
<OPTION>N</OPTION>
</SELECT>
<INPUT TYPE=BUTTON VALUE="Re-Scroll-With-Disable" onClick="doDisableScroll
()"></TD>
<TD><INPUT TYPE=BUTTON VALUE="Re-Scroll" onClick="doScroll()"></TD>
</TR>
<TR><TD COLSPAN=3>Report Position:<INPUT TYPE=TEXT NAME=m_text
VALUE=""></TD></TR>
</TABLE>
</FORM>
</BODY>
</HTML>
Actual Results:
The listbox fails to scroll when the disabled property is set to true, The
enclosed sample HTML/javascript code demonstrates the problem. You will need
to copy and paste it into a file.
Expected Results:
One needs to allow the listbox to be disabled, to prevent onClick events from
being triggered by an impatient user clicking away on the listbox, while an
intensive asynchronous bit of code is executing. However, when the disabled
property is turned off, and the listbox is active again, other bits of code
should be able to scroll the listbox. Without this ability, the listbox is
severely limited in its application to complex problems. Besides, fixing this
feature makes Firefox/Mozilla browsers competitive browsers that have all the
necessary features to run our ERM platform, and this makes it possible for us
to promote the browsers on equal (or better) terms as with any other browsers
out there. Firefox is a darn good browser.
This bug exists in the other Mozilla browsers. By the way, IE doesn't have
this problem.
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Comment 1•20 years ago
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Comment 2•20 years ago
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arsukdeo@technocorp.com: this looks like it's been fixed in the nightly builds of mozilla. Can you download one of those to test, and if it works for you resolve the bug as WORKSFORME?
I have been unable to run the latest build of Firefox due to a failure to run the build in my win 2000 prof o/s, however the latest build of Mozilla appears to work: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8a6) Gecko/20041207 Someone needs to confirm that the latest Firefox build (in the other O/Ss) has resolved this bug. Thank you. I have discovered another bug associated with scrolling a listbox using the "selectedIndex" property in Mozilla/Firefox that I will log separately, after I do some investigation. From what I have observed so far, if one was to modify the listbox element after the "selectedIndex" property is set, the selected item is lost.
I was able to run the test on the latest Firefox build and this bug has been fixed. Thank you.
Status: UNCONFIRMED → RESOLVED
Closed: 20 years ago
Resolution: --- → WORKSFORME
Somehow in the latest official release of firefox, this bug is not resolved. Please retest.
Status: RESOLVED → UNCONFIRMED
Resolution: WORKSFORME → ---
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Comment 6•20 years ago
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The latest official release is 1.0.3, which is the same as 1.0 with a very few security fixes. It is not the development build, which this problem is (still) fixed in. The first official release this will be fixed in is 1.1.
Status: UNCONFIRMED → RESOLVED
Closed: 20 years ago → 20 years ago
Resolution: --- → WORKSFORME
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Description
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