i have a event bind function like this(though it is not so robust):
bind$=function(o,evt,fn,cb){
var aE='attachEvent';
var aEL='addEventListener';
if(!o[aE]&&o[aEL]){
return o[aEL](evt,fn,!!cb);
}
return o[aE]('on'+evt,fn);
};
some usage like this:
bind$( /* o */ document, /* evt */ 'click', /* fn */ function(txt)
{alert(txt);} );
but how can I pass a parameter to the bound function "fn" ? 6 2054
On May 28, 10:57 am, Max <Maximus.Zh...@gmail.comwrote:
i have a event bind function like this(though it is not so robust):
bind$=function(o,evt,fn,cb){
var aE='attachEvent';
var aEL='addEventListener';
if(!o[aE]&&o[aEL]){
return o[aEL](evt,fn,!!cb);
}
return o[aE]('on'+evt,fn);
};
some usage like this:
bind$( /* o */ document, /* evt */ 'click', /* fn */ function(txt)
{alert(txt);} );
but how can I pass a parameter to the bound function "fn" ?
Simply define the "fn" argument as an anonymous function that
specifies inside of it all the special parameters or initialization
that you want.
For instance, if your actual event handler takes both the expected
"evt" parameter along with an additional "foo" parameter, then the
"fn" argument could be this:
function (evt) { myhandler(evt, "bar"); }
On 5ÔÂ29ÈÕ, ÉÏÎç8ʱ15·Ö, "david.karr" <davidmichaelk....@gmail.comwrote:
On May 28, 10:57 am, Max <Maximus.Zh...@gmail.comwrote:
i have a event bind function like this(though it is not so robust):
bind$=function(o,evt,fn,cb){
var aE='attachEvent';
var aEL='addEventListener';
if(!o[aE]&&o[aEL]){
return o[aEL](evt,fn,!!cb);
}
return o[aE]('on'+evt,fn);
};
some usage like this:
bind$( /* o */ document, /* evt */ 'click', /* fn */ function(txt)
{alert(txt);} );
but how can I pass a parameter to the bound function "fn" ?
Simply define the "fn" argument as an anonymous function that
specifies inside of it all the special parameters or initialization
that you want.
For instance, if your actual event handler takes both the expected
"evt" parameter along with an additional "foo" parameter, then the
"fn" argument could be this:
function (evt) { myhandler(evt, "bar"); }
thanks for reply.
may be I didnt display my situation clearly.
my bind function goes :
under firefox it is supposed to be like
document.addEventListener( 'click', function(txt){alert(txt);} ,
false );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
but I found problem when trying to transfer a parameter to the one
argument txt.
On May 29, 4:56 pm, Max <Maximus.Zh...@gmail.comwrote:
On 5ÔÂ29ÈÕ, ÉÏÎç8ʱ15·Ö, "david.karr" <davidmichaelk...@gmail.comwrote:
On May 28, 10:57 am, Max <Maximus.Zh...@gmail.comwrote:
i have a event bind function like this(though it is not so robust):
bind$=function(o,evt,fn,cb){
var aE='attachEvent';
var aEL='addEventListener';
if(!o[aE]&&o[aEL]){
return o[aEL](evt,fn,!!cb);
}
return o[aE]('on'+evt,fn);
};
some usage like this:
bind$( /* o */ document, /* evt */ 'click', /* fn */ function(txt)
{alert(txt);} );
but how can I pass a parameter to the bound function "fn" ?
Simply define the "fn" argument as an anonymous function that
specifies inside of it all the special parameters or initialization
that you want.
For instance, if your actual event handler takes both the expected
"evt" parameter along with an additional "foo" parameter, then the
"fn" argument could be this:
function (evt) { myhandler(evt, "bar"); }
thanks for reply.
may be I didnt display my situation clearly.
my bind function goes :
under firefox it is supposed to be like
document.addEventListener( 'click', function(txt){alert(txt);} ,
false );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
but I found problem when trying to transfer a parameter to the one
argument txt.
On event listener call there are two "persistent" objects available:
1) the bound HTML element referred by "this"
2) the event handler referred by "arguments.callee"
The first one can be used to store element-specific extra info. There
is also Function constructor - this is what I am using most often -
and closures which is an awful way IMO to use for identical event
handlers.
-- Option 1 --
refHtmlElement.
addEventListener('click',
new Function(txt, functionBody),
false);
-- Option 2 --
refHtmlElement.
addEventListener('click',
myFunction,
false);
refHtmlElement.args = {
'txt' : txt
};
and then later
function myFunction(evt) {
var txt = this.args.txt;
// ...
}
On 5ÔÂ29ÈÕ, ÏÂÎç9ʱ40·Ö, VK <schools_r...@yahoo.com>wrote:
On May 29, 4:56 pm, Max <Maximus.Zh...@gmail.comwrote:
On 5ÔÂ29ÈÕ, ÉÏÎç8ʱ15·Ö, "david.karr" <davidmichaelk...@gmail.comwrote:
On May 28, 10:57 am, Max <Maximus.Zh...@gmail.comwrote:
i have a event bind function like this(though it is not so robust):
bind$=function(o,evt,fn,cb){
var aE='attachEvent';
var aEL='addEventListener';
if(!o[aE]&&o[aEL]){
return o[aEL](evt,fn,!!cb);
}
return o[aE]('on'+evt,fn);
};
some usage like this:
bind$( /* o */ document, /* evt */ 'click', /* fn */ function(txt)
{alert(txt);} );
but how can I pass a parameter to the bound function "fn" ?
Simply define the "fn" argument as an anonymous function that
specifies inside of it all the special parameters or initialization
that you want.
For instance, if your actual event handler takes both the expected
"evt" parameter along with an additional "foo" parameter, then the
"fn" argument could be this:
function (evt) { myhandler(evt, "bar"); }
thanks for reply.
may be I didnt display my situation clearly.
my bind function goes :
under firefox it is supposed to be like
document.addEventListener( 'click', function(txt){alert(txt);} ,
false );
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
but I found problem when trying to transfer a parameter to the one
argument txt.
On event listener call there are two "persistent" objects available:
1) the bound HTML element referred by "this"
2) the event handler referred by "arguments.callee"
The first one can be used to store element-specific extra info. There
is also Function constructor - this is what I am using most often -
and closures which is an awful way IMO to use for identical event
handlers.
-- Option 1 --
refHtmlElement.
addEventListener('click',
new Function(txt, functionBody),
false);
-- Option 2 --
refHtmlElement.
addEventListener('click',
myFunction,
false);
refHtmlElement.args = {
'txt' : txt
};
and then later
function myFunction(evt) {
var txt = this.args.txt;
// ...
}
thanks VK
I was testing.....
but if the addEventListener is used in some class and the
refHtmlElement should be document, then the way in option2 you
mentioned just not work.
class like:
idle=function(callback){
this.starttime=new Date();
this.bound=false;
this.fn=callback;
this.reset=function(){
this.starttime=new Date();
};
this.init=function(){
if(!this.bound){
document.
addEventListener('mousemove',
this.reset,
false);
this.bound=true;
}
var secs=((new Date())-this.starttime)/1000;
if( secs % 59 == 0 ) {
this.fn();
}
}
....
};
....
/*
myidle=new idle(some function);
setInterval('myidle.init();',1000);
*/
i want to indicate (by mousemove event) if the user
left the page for every 60 seconds, and
the function fn is tiggered.
and by reset the starttime to new Date() while the user is
still active on the page.(also by mousemove event)
but after event bound, in the this.reset function,
this is no more refer to the object i create (eg. myidle),
~~~~
but refer to document instead.
I should use document for the "refHtmlElement", do you
think not?
any solutions?
how about this?
var idle=function(callback){
var me=this;
* * * * me.starttime=new Date();
* * * * me.bound=false;
* * * * me.fn=callback;
* * * * me.reset=function(){
* * * * * * * * me.starttime=new Date();
* * * * * * * * };
* * * * me.init=function(){
* * * * * * * * if(!me.bound){
* * * * * * * * * * * * document.
* * * * * * * * * * * * addEventListener('mousemove',
* * * * * * * * * * * * * * * * me.reset,
* * * * * * * * * * * * * * * * false);
* * * * * * * * * * * * me.bound=true;
* * * * * * * * }
* * * * * * * * var secs=((new Date())-me.starttime)/1000;
* * * * * * * * if( secs % 59 == 0 ) {
* * * * * * * * * * * * me.fn();
* * * * * * * * }
* * * * }
* * * * ....};
....
/*
myidle=new idle(some function);
setInterval('myidle.init();',1000);
*/
On 5ÔÂ30ÈÕ, ÉÏÎç12ʱ07·Ö, RoLo <roloswo...@gmail.comwrote:
how about this?
var idle=function(callback){
var me=this;
me.starttime=new Date();
me.bound=false;
me.fn=callback;
me.reset=function(){
me.starttime=new Date();
};
me.init=function(){
if(!me.bound){
document.
addEventListener('mousemove',
me.reset,
false);
me.bound=true;
}
var secs=((new Date())-me.starttime)/1000;
if( secs % 59 == 0 ) {
me.fn();
}
}
....};
....
/*
myidle=new idle(some function);
setInterval('myidle.init();',1000);
*/
Yeah, it works very nicely.
Thank you all very much! This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: J.R. |
last post by:
Hi folks,
The python can only support passing value in function call (right?), I'm
wondering how to effectively pass a large parameter, such as a large list or
dictionary?
It could achieved...
|
by: Mr A |
last post by:
Hi!
I've been thinking about passing parameteras using references instead
of pointers in order to emphasize that the parameter must be an
object.
Exemple:
void func(Objec& object); //object...
|
by: Alan Silver |
last post by:
Hello,
I'm a bit surprised at the amount of boilerplate code required to do
standard data access in .NET and was looking for a way to improve
matters. In Classic ASP, I used to have a common...
|
by: Xiaoshen Li |
last post by:
Dear All,
I thought I understood using pointer variables as function parameters.
But I failed to understand why it is needed pass-by-reference of a
pointer variable.
To me, pointer variable...
|
by: Ranginald |
last post by:
Hi,
I have a repeater based on a stored procedure. It pulls the following:
catDesc Image
The user sees the category description (catDesc) , and then clicks on
the image (Image) which is...
|
by: David++ |
last post by:
Hi folks,
I would be interested to hear peoples views on whether or not 'pass by
reference' is allowed when using a Web Service method.
The thing that troubles me about pass-by-reference into...
|
by: Abhi |
last post by:
I wrote a function foo(int arr) and its prototype
is declared as foo(int arr); I modify the values of the array in the
function and the values are getting modified in the main array which
is...
|
by: venkatagmail |
last post by:
I have problem understanding pass by value and pass by reference and
want to how how they are or appear in the memory:
I had to get my basics right again. I create an array and try all
possible...
|
by: raylopez99 |
last post by:
Keywords: scope resolution, passing classes between parent and child
forms, parameter constructor method, normal constructor, default
constructor, forward reference, sharing classes between forms....
|
by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
|
by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers,...
|
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing,...
| |