Call Member Of Class Without Object Initiation?
Jun 22, 2011Is there any way to call a method of a 'class' in without creating an instance of this class?
View 2 Replies
ADVERTISEMENT
Accessing Class Member Using This Inside An Anonymous Function Call In A Class Method?
Mar 28, 2010I'm using jquery to make it easy for AJAX calls.
So I create a class: function cMap(mapID){//vars and stuff}
I go and prototype a function: cMap.prototype.loadMap = function(){ //jquery AJAX call }
Now in the jquery $.ajax({...}); call, I use an anonymous function on the "success:" call: success: function(data){ this.member = data; }
My problem is that inside this anonymous function call I'm trying to call a class member of my cMap class to store the data in from the AJAX call, but it's out of scope. So the JS console in FF/Chrome throws errors about bad value/doesn't exist.
How can I access this class member from inside an anonymous function? Or at least what's a good way to go about doing all this?
Get The Price Updated Based On Users Dropdown Selection For Member And Non-Member?
Oct 15, 2009I am trying to get the price updated based on users dropdown selection for Member and Non-Member and also multiply it by how many they want.Should I use javascript on the page or split the page into two where 1st one would collect basic info and if they are member or non members and second would collect quantity?
View 1 Replies View RelatedOOPS - Variable Visibility - Access The Mb_c Which Is Member Of Order Class Within The Setup Function Which Has An Argument Mb_c?
Mar 31, 2010I have a class and function within it, like so
[Code]...
That code shows an alert box with 'mb_c is 1' and next alert box as 'other mb_c is undefined'. How do i access the mb_c which is member of Order class within the setup function which has an argument mb_c ?
Ajax :: Call To Php Class Function?
Jan 2, 2010Is it possible to use AJAX to call a PHP function. I know you can request a PHP page but I would like to call a PHP function and display the return using AJAX .
View 3 Replies View RelatedDefine Or Call A Function From A Css Class?
Jun 6, 2009how i can define or call a javascript function from a css class or id.
I basically want to display a javascript carousel image rotator and i have the function but don`t know how i can call it using a css class that i can later reference in an html <img class"carouselfunction"> tag.
Call A Class Function Using Beans?
Jun 30, 2009I want to call a class function using beans inside java script. but it is not working. It calls that function only 1 time.
<jsp:useBean id="track" scope="session" class="ReturnProgress"></jsp:useBean>
<script type="text/javascript">
function getProgress()
[code]...
I want that Whenever user clicks on button , I call getProgress function on onclick event that fetches progress using findprogress() method.
JQuery :: Call A Method From Current Class Using Keypress ?
Mar 30, 2011I have the following code in one of my pages. My problem is caused, because the method "processEvent" is never called, but I have no idea why. I guess it is broken, because I don't relay the "this" object correctly.
<script type="text/javascript">
var MyClass = function()
{
this.init = function()
[Code].....
JQuery :: Getting CSS Class As Object?
Feb 14, 2011Is there anyway to have a CSS class returned as an object? This would be rather useful to feed, for example, to the .animate() function. There is no way to animate directly to a CSS class as destination, is there?
View 5 Replies View RelatedChanging The Class Of An Object?
May 21, 2011i have this code for changing the class of object 1 as mouse comes over object 2, the class changes back when mouses goes out.
Code:
<SCRIPT type="text/javascript">
function changeClass(floor3)
{
var obj = document.getElementById(floor3);
[Code].....
How To Call The First Reference Object
Jul 11, 2011$(function(){
$('.table_pay').dblclick(function(){
if($('div', this).is('.value')){
[code]...
What to do on the 13th line that the reference object which is on the 2nd line (the class named"table_pay") will be its reference call..
Members Of The Error Class/object
Apr 18, 2006What're the members of the error class/object? Is there a complete reference to all JavaScript objects available on the Web?
View 6 Replies View RelatedHow Do I Access The Object Instance From Within Class
Apr 22, 2007I have a javascript object which dynamically generates a table adding, deleting and moving rows as the user clicks on buttons or links. Problem is when I generate a table row and add the javascript method call to my class, I have to put the object instance name variable of the class in order for it to be called from the onclick=function(). This is seriously limiting, but I'm stuck for a way round it. Heres a edited of the code so you get the idea....
Instantiating the object :-
var dtl = new DynamicTableList("table1", $
{myObject.allFieldsAsJavaScriptArray}, true, true, true);
My javascript class DynamicTableList, note the dtl javascript object
instance variable being referred to in the addRow function. How can I
avoid this???
function DynamicTableList(thisObjName, tableName, options, showDelete,
showUp, showDown)
{
this.processRow = function(r, row, up, down)
{
...
};
this.processRows = function()
{
...
};
this.getVisibility = function(visible)
{
...
};
this.delRow = function(button)
{
...
};
this.addRow = function(selection)
{
...
if (showDelete)
{
var cell2 = document.createElement('TD');
var inp2 = document.createElement('IMG');
/
************************************************** ***********************************************/
inp2.onclick=function(){dtl.delRow(this);} // Have to specify
dtc!!!!!!!!
/
************************************************** ***********************************************/
inp2.title='Delete'
inp2.alt='Delete'
inp2.src='images/delete.gif'
cell2.appendChild(inp2);
row.appendChild(cell2);
}
...
tbody.appendChild(row);
this.processRows();
};
this.moveRow = function(node, vector)
{
};
}
Obviously the code dtl.delRow(this); is being dynamically generated, but how do I replace the dtl instance name with something that'll work whatever the user of this class calls the instance of it!
JQuery :: Get ID Of Every Object In Class On Each Loop?
Feb 26, 2010I have an each loop that goes through all the elements in a certain class. What I need to do is get the ID of the current element in the each loop, but I can't seem to figure out how to. var currentID =$(this).attr ("id"); was my first assumption, but it's not working. [code]The css is just for debugging, not the goal, so alternate ways for me to do that won't help.
View 1 Replies View RelatedJQuery :: Toggle Css Class Of Object
Oct 25, 2011I am working on a Master-Detail grid that allows users to click on master rows to show or hide details rows. [code]What I want to do is to add Expandable class to SummaryRow if it's collapsed, add Collapsible class if it's expanded. But I don't know how to do that.
View 1 Replies View RelatedNew Object From User-defined Class In IE8?
Nov 18, 2010I've been writing a slideshow script that I've had working perfectly on my mac in Chrome and Safari, however I went to look at it in IE8 and lo and behold it falls over. It says 'object doesn't support this property or method' in relation to the new SlideShow line in the main() function.
View 3 Replies View RelatedJQuery :: Call A Method Outside A Object?
Jun 25, 2009I found very difficult to call a method outside his scope.For example I have 2 files js
myFunction.js
init.js (where I initialize all my page)
[init.js ][code]....
I tried many syntax in order to call the method outside its scope
$.getX();
$(function(){getX()});
$().function().getX();
$("myHtmlObj").click(function(){getX()});
Call A Method In The Parent Object
Apr 9, 2009I have a question about OOP Javascript...
How can you call a parent method from a child object?
for example...
Am i using the right way of making an object? prototypal vs classical?
Object Won't Alert In A Function That I Call
Jul 18, 2009Why won't the alert(arr[1].src); work in the showMe(); function
I don't get an error saying what I'm doing wrong [code]...
AddEventListener With Member Functions
Sep 20, 2009I'm having problem setting up event handling using member functions. Consider the following code snippet:
Code:
The problem is that I get a
Code:
AddEventListener And Member Functions?
Sep 20, 2009I'm having problem setting up event handling using member functions. Consider the following code snippet:
function Widget()
{
this.register = function()
{
document.getElementById(this.id).addEventListener('click', this.default_click_handler, false);
}
this.default_click_handler = function(event)
[Code]...
The Timer Class, For Object-oriented Timeouts
Nov 27, 2002The problems with the setTimeout and setInterval functions provided in Javascript are twofold. First, you can't call a local object method without losing your scope, and second, you can't pass objects to the function, since the function call is implemented as a string.
The Timer class solves these difficulties by employing a static array to store the parent object and function arguments until the function is called.
This class is provided as-is and pro bono, so go ahead and muck with it if you see things that could be done better.
Thanks to WA for giving me the idea for this (albeit indirectly)!
Updated 4/18/2003: Footprint decreased, minor code improvements.
Updated 5/3/2003: Minor comment clarification; no code changes.
Updated 5/10/2003: Minor code improvements.
// The constructor should be called with
// the parent object (optional, defaults to window).
function Timer(){
this.obj = (arguments.length)?arguments[0]:window;
return this;
}
// The set functions should be called with:
// - The name of the object method (as a string) (required)
// - The millisecond delay (required)
// - Any number of extra arguments, which will all be
// passed to the method when it is evaluated.
Timer.prototype.setInterval = function(func, msec){
var i = Timer.getNew();
var t = Timer.buildCall(this.obj, i, arguments);
Timer.set[i].timer = window.setInterval(t,msec);
return i;
}
Timer.prototype.setTimeout = function(func, msec){
var i = Timer.getNew();
Timer.buildCall(this.obj, i, arguments);
Timer.set[i].timer = window.setTimeout("Timer.callOnce("+i+");",msec);
return i;
}
// The clear functions should be called with
// the return value from the equivalent set function.
Timer.prototype.clearInterval = function(i){
if(!Timer.set[i]) return;
window.clearInterval(Timer.set[i].timer);
Timer.set[i] = null;
}
Timer.prototype.clearTimeout = function(i){
if(!Timer.set[i]) return;
window.clearTimeout(Timer.set[i].timer);
Timer.set[i] = null;
}
// Private data
Timer.set = new Array();
Timer.buildCall = function(obj, i, args){
var t = "";
Timer.set[i] = new Array();
if(obj != window){
Timer.set[i].obj = obj;
t = "Timer.set["+i+"].obj.";
}
t += args[0]+"(";
if(args.length > 2){
Timer.set[i][0] = args[2];
t += "Timer.set["+i+"][0]";
for(var j=1; (j+2)<args.length; j++){
Timer.set[i][j] = args[j+2];
t += ", Timer.set["+i+"]["+j+"]";
}}
t += ");";
Timer.set[i].call = t;
return t;
}
Timer.callOnce = function(i){
if(!Timer.set[i]) return;
eval(Timer.set[i].call);
Timer.set[i] = null;
}
Timer.getNew = function(){
var i = 0;
while(Timer.set[i]) i++;
return i;
}
Here's an example of the code in action:
function Ticker(){
this.count = 0;
this.timer = new Timer(this);
}
Ticker.prototype.tick = function(d){
this.count+=d;
window.status = ""+this.count;
this.timer.setTimeout("tick", 1000, d);
}
window.onload = function(){
var ticker = new Ticker();
ticker.tick(1);
}
Class Array In Custom Object Not Working?
Jan 19, 2010I have created a class array (or variable that contains an array) and am trying to add an element to the array when a new Element object is created. Thus, the line of code to add a new element to the array is within the Element object's constructor function. However, the browser just gives me an error "object expected on line 9", the line of code trying to add an element to the array.
Are arrays not functional within objects? Or, is it that the array is made as a class variable?
Code:
function Element() {
// INSTANCE VARIABLES
this.name = "newElement" + Element.total_elements_created; // GIVE UNIQUE NAME
// INITIALIZATIONS
Element.element_count ++; // INCREASE TOTAL NUMBER OF ELEMENTS EXISTING
[Code]...
Prototype :: Create A Reusable Object/class
Jul 4, 2011What I have been doing so far to make a "class"/Reusable object is this:
PHP Code:
function Dog(){
this.name name;
this.bark = function(){
[code]...
However, recently I have been reading a book on Javascript and it said that the problem with this way of doing it, is that the bark() function will be loaded into memory for each Dog object created this way, while the body of that function is the same for each object.
- A Person class with a name property and a jump() method.
- An animal class with a isMammal property and move() method.
- A Dog class with a numberOfLegs property and a bark() method which is a subclass of Animal (thus inherits the isMammal property and move() method.
- Each of those classes in its own file.
This book I've been reading is actually pretty good, but at some points it's explanation is not rich enough.It explains that functions are objects and that objects in javascript are just key-value pairs. It says that each function has a prototype property which points to a blank Object(), but you can make it point to something else? or maybe I misunderstood it. I still don't understand how it really works.
JQuery :: Dynamic Call Property On Object ?
Apr 1, 2010I got a javascript object with some propeties let's say
function Animal() {
this.id; this.name;
}
I need to call id function in a dynamic way to get and set its value: something like this
Animal animal = new Animal();
var propertyName = "id";
animal.+propertyName = "name";
I tried like this:
$animal = $(animal);
$animal[propertyName]();
but i receive animal.propertyName is not a function.Is there an elegant way to do it with jQuery?
JQuery :: Call SetInterval Function With Some Object?
Sep 14, 2010can we call setInterval function in jquery with some object
View 1 Replies View Related