Rails spinoffs - Jun 2007 - Droppable onHover fires on page load, not on hover

Hi all, first post.  I have a simple set of drag/drops that I''m trying
to use in FF.  Unfortunately on page load all of the droppables on the
page fire simultaneously and then won''t respond to any futher attempts
to drop anything on them.  Firebug isn''t showing any errors and
I''m
completely stumped...  Any ideas of where to look?

using: Droppables.add(divIdName, {accept: ''prospect'', onHover:
showConsultantSchedule(keyVar)});
where divIdName is the var to the div name
and keyVar is the ID that I need to send to the DB server
and prospect is the class of the draggables

I''m also using handles on the drags that match the div id that they
are assigned to (already tried changing their name to no avail...)

Thanks for any insight!

Chris


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There are variations on this question a couple of times per week, it  
seems. It comes from a lack of understanding of function references,  
and how to use them.

Given the code below, it is clear you are assigning the *result* of  
showConsultantSchedule (i.e. the return value after you call it),  
rather than a reference to it.

That''s the difference between
onHover: someFunc()

and
onHover: someFunc

 From peeking at the Scriptaculous code, it seems the "onHover"  
callback passes three parameters, as follows:
function(element, dropon, overlap)

... so you could rewrite your showConsultantSchedule() function to  
accept these parameters.


TAG

On Jun 28, 2007, at 3:00 PM, chris-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org
wrote:
>
> Hi all, first post.  I have a simple set of drag/drops that I''m
trying
> to use in FF.  Unfortunately on page load all of the droppables on the
> page fire simultaneously and then won''t respond to any futher
attempts
> to drop anything on them.  Firebug isn''t showing any errors and
I''m
> completely stumped...  Any ideas of where to look?
>
> using: Droppables.add(divIdName, {accept: ''prospect'',
onHover:
> showConsultantSchedule(keyVar)});
> where divIdName is the var to the div name
> and keyVar is the ID that I need to send to the DB server
> and prospect is the class of the draggables
>
> I''m also using handles on the drags that match the div id that
they
> are assigned to (already tried changing their name to no avail...)
>
> Thanks for any insight!
>
> Chris
>
>
> >

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That worked, thanks for the quick lesson.  The next problem is that
now when I hover over the drop, the event fires 10 times (the number
of items in the prospect class total) instead of just once.

Changed the code to:

Droppables.add(divIdName, {accept: ''prospect'', onHover:
function()
{showConsultantSchedule(keyVar)} });

Thanks!

Chris


On Jun 28, 4:25 pm, Tom Gregory <t...-PGZyUNKar/Q@public.gmane.org>
wrote:
> There are variations on this question a couple of times per week, it  
> seems. It comes from a lack of understanding of function references,  
> and how to use them.
>
> Given the code below, it is clear you are assigning the *result* of  
> showConsultantSchedule (i.e. the return value after you call it),  
> rather than a reference to it.
>
> That''s the difference between
> onHover: someFunc()
>
> and
> onHover: someFunc
>
>  From peeking at the Scriptaculous code, it seems the "onHover"  
> callback passes three parameters, as follows:
> function(element, dropon, overlap)
>
> ... so you could rewrite your showConsultantSchedule() function to  
> accept these parameters.
>
> TAG
>
> On Jun 28, 2007, at 3:00 PM, c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org
wrote:
>
>
>
>
>
> > Hi all, first post.  I have a simple set of drag/drops that
I''m trying
> > to use in FF.  Unfortunately on page load all of the droppables on the
> > page fire simultaneously and then won''t respond to any futher
attempts
> > to drop anything on them.  Firebug isn''t showing any errors
and I''m
> > completely stumped...  Any ideas of where to look?
>
> > using: Droppables.add(divIdName, {accept:
''prospect'', onHover:
> > showConsultantSchedule(keyVar)});
> > where divIdName is the var to the div name
> > and keyVar is the ID that I need to send to the DB server
> > and prospect is the class of the draggables
>
> > I''m also using handles on the drags that match the div id
that they
> > are assigned to (already tried changing their name to no avail...)
>
> > Thanks for any insight!
>
> > Chris- Hide quoted text -
>
> - Show quoted text -

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Actually, I did some experimenting and it is not actually firing the
event 10 times every time, it seems to be tied to the number of pixels
into the droppable that I go.  If I hold still, it will stop firing
but fire the moment I move the draggable, the exact number of times
for every pixel that I move it.  I tried the "greedy" option but it
looks like it only is for layered droppables and had no effect.

Chris

On Jun 28, 4:42 pm, "c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org"
<c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org>
wrote:
> That worked, thanks for the quick lesson.  The next problem is that
> now when I hover over the drop, the event fires 10 times (the number
> of items in the prospect class total) instead of just once.
>
> Changed the code to:
>
> Droppables.add(divIdName, {accept: ''prospect'', onHover:
function()
> {showConsultantSchedule(keyVar)} });
>
> Thanks!
>
> Chris
>
> On Jun 28, 4:25 pm, Tom Gregory <t...-PGZyUNKar/Q@public.gmane.org>
wrote:
>
>
>
> > There are variations on this question a couple of times per week, it  
> > seems. It comes from a lack of understanding of function references,  
> > and how to use them.
>
> > Given the code below, it is clear you are assigning the *result* of  
> > showConsultantSchedule (i.e. the return value after you call it),  
> > rather than a reference to it.
>
> > That''s the difference between
> > onHover: someFunc()
>
> > and
> > onHover: someFunc
>
> >  From peeking at the Scriptaculous code, it seems the
"onHover"
> > callback passes three parameters, as follows:
> > function(element, dropon, overlap)
>
> > ... so you could rewrite your showConsultantSchedule() function to  
> > accept these parameters.
>
> > TAG
>
> > On Jun 28, 2007, at 3:00 PM,
c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org wrote:
>
> > > Hi all, first post.  I have a simple set of drag/drops that
I''m trying
> > > to use in FF.  Unfortunately on page load all of the droppables
on the
> > > page fire simultaneously and then won''t respond to any
futher attempts
> > > to drop anything on them.  Firebug isn''t showing any
errors and I''m
> > > completely stumped...  Any ideas of where to look?
>
> > > using: Droppables.add(divIdName, {accept:
''prospect'', onHover:
> > > showConsultantSchedule(keyVar)});
> > > where divIdName is the var to the div name
> > > and keyVar is the ID that I need to send to the DB server
> > > and prospect is the class of the draggables
>
> > > I''m also using handles on the drags that match the div
id that they
> > > are assigned to (already tried changing their name to no
avail...)
>
> > > Thanks for any insight!
>
> > > Chris- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -

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Two questions that may help someone better address your issue:

1. What version of Prototype/Scriptaculous are you using?

2. Can you post your code somewhere?


TAG

On Jun 28, 2007, at 4:12 PM, chris-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org
wrote:
>
> Actually, I did some experimenting and it is not actually firing the
> event 10 times every time, it seems to be tied to the number of pixels
> into the droppable that I go.  If I hold still, it will stop firing
> but fire the moment I move the draggable, the exact number of times
> for every pixel that I move it.  I tried the "greedy" option but
it
> looks like it only is for layered droppables and had no effect.
>
> Chris
>
> On Jun 28, 4:42 pm,
"c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org"
<c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org> wrote:
>> That worked, thanks for the quick lesson.  The next problem is that
>> now when I hover over the drop, the event fires 10 times (the number
>> of items in the prospect class total) instead of just once.
>>
>> Changed the code to:
>>
>> Droppables.add(divIdName, {accept: ''prospect'',
onHover: function()
>> {showConsultantSchedule(keyVar)} });
>>
>> Thanks!
>>
>> Chris
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Here''s the html portion:

<div id = ''calendar''>
	<script>new
Ajax.Request(''/cgi-bin/gen3.cgi?p=Generate_Calendar'',
{   method:''get'', onSuccess: function(transport){       var
response transport.responseText || "No Response from Server";  var
p_temp = new
Array();  p_temp = response.split('' '');  p_temp.each(
function(p_key)
{ addCalendarElement(p_key);  }); build_action_area(); },
onFailure: function(){ alert(''Lost Connection.'') }   });
</script>
</div>

And the relevant JS:

<script language="javascript">
function addCalendarElement(keyVar) {
 var ni = document.getElementById(''calendar'');
 var newdiv = document.createElement(''div'');
 var divIdName = ''Con''+keyVar;
 newdiv.setAttribute(''id'',divIdName);
 newdiv.setAttribute(''class'',''consultant'');
 newdiv.innerHTML = ''<img src="/gen3_images/indicator.gif"
alt="Loading..."  />'';
 ni.appendChild(newdiv);
 Droppables.add(divIdName, {accept: ''prospect'', onHover:
function()
{showConsultantSchedule(keyVar)} });
 new Ajax.Updater(divIdName, ''/cgi-bin/gen3.cgi?
p=Get_Consultant_Info&consultant=''+keyVar, {
method:''get''});
}

function showConsultantSchedule(cons) {
 new Ajax.Updater(''schedule'', ''/cgi-bin/gen3.cgi?
p=Show_Consultant_Schedule&consultant=''+cons, {
method:''get''});
} </script>

I know this is simple code and not very elegant yet, but I''m just
building a prototype of the program to show the usefulness of such a
setup over our current system.  Any help would be appreciated.  I''ve
tried this code on both the 1.7.0 and 1.7.1b3 scripts and it still
fired constantly when there is movement in the drop zone.

On Jun 28, 5:23 pm, Tom Gregory <t...-PGZyUNKar/Q@public.gmane.org>
wrote:
> Two questions that may help someone better address your issue:
>
> 1. What version of Prototype/Scriptaculous are you using?
>
> 2. Can you post your code somewhere?
>
> TAG
>
> On Jun 28, 2007, at 4:12 PM, c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org
wrote:
>
>
>
>
>
> > Actually, I did some experimenting and it is not actually firing the
> > event 10 times every time, it seems to be tied to the number of pixels
> > into the droppable that I go.  If I hold still, it will stop firing
> > but fire the moment I move the draggable, the exact number of times
> > for every pixel that I move it.  I tried the "greedy" option
but it
> > looks like it only is for layered droppables and had no effect.
>
> > Chris
>
> > On Jun 28, 4:42 pm,
"c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org"
<c...-Rr9DA/eDl4tzbRFIqnYvSA@public.gmane.org> wrote:
> >> That worked, thanks for the quick lesson.  The next problem is
that
> >> now when I hover over the drop, the event fires 10 times (the
number
> >> of items in the prospect class total) instead of just once.
>
> >> Changed the code to:
>
> >> Droppables.add(divIdName, {accept: ''prospect'',
onHover: function()
> >> {showConsultantSchedule(keyVar)} });
>
> >> Thanks!
>
> >> Chris- Hide quoted text -
>
> - Show quoted text -

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