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  • Can I get a reference to an object created in a jQuery plugin?

    - by gargantaun
    Perhaps my brain is fried, but I'm writing a plugin that created an tweaks an element, but also creates an object that i'd like access to. So the plugin looks like this (function ($) { $.fn.myPlugin = function () { return this.each(function () { // do some stuff to the element... this.objectInstance = new usefulObject(); }); }; })(jQuery); function usefulObject(){ // useful object properties and methods.... this.doSomething = function(){ alert("Don't google Google. You'll break the internet."); } } so when I call the plugin, I also want to be able to get access to that usefulObject that I created. I thought something like this might work.... tweakedElement = $("#someDiv").myPlugin(); tweakedElement.objectInstance.doSomething(); ... but that's not working. How can I achieve this? Can I achieve this? Answers on a postcard, or down below, whichever suits you.

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  • How to show useful error messages from a database error callback in Phonegap?

    - by Magnus Smith
    Using Phonegap you can set a function to be called back if the whole database transaction or the individual SQL statement errors. I'd like to know how to get more information about the error. I have one generic error-handling function, and lots of different SELECTs or INSERTs that may trigger it. How can I tell which one was at fault? It is not always obvious from the error message. My code so far is... function get_rows(tx) { tx.executeSql("SELECT * FROM Blah", [], lovely_success, statement_error); } function add_row(tx) { tx.executeSql("INSERT INTO Blah (1, 2, 3)", [], carry_on, statement_error); } function statement_error(tx, error) { alert(error.code + ' / ' + error.message); } From various examples I see the error callback will be passed a transaction object and an error object. I read that .code can have the following values: UNKNOWN_ERR = 0 DATABASE_ERR = 1 VERSION_ERR = 2 TOO_LARGE_ERR = 3 QUOTA_ERR = 4 SYNTAX_ERR = 5 CONSTRAINT_ERR = 6 TIMEOUT_ERR = 7 Are there any other properties/methods of the error object? What are the properties/methods of the transaction object at this point? I can't seem to find a good online reference for this. Certainly not on the Phonegap website!

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  • Need of optimized code for hide and show div in jQuery

    - by novellino
    Hello, I have a div: <div id="p1" class="img-projects" style="margin-left:0;"> <a href="project1.php"> <img src="image1.png"/></a> <div id="p1" class="project-title">Bar Crawler</div> </div> On mouse-over I want to add an image with opacity and make the project-title shown. So I use this code: <script type="text/javascript"> $(function() { $('.project-title').hide(); $('#p1.img-projects img').mouseover( function() { $(this).stop().animate({ opacity: 0.3 }, 800); $('#p1.project-title').fadeIn(500); }); $('#p1.img-projects img').mouseout( function() { $(this).stop().animate({ opacity: 1.0 }, 800); $('#p1.project-title').fadeOut(); }); $('#p2.img-projects img').mouseover( function() { $(this).stop().animate({ opacity: 0.3 }, 800); $('#p2.project-title').fadeIn(500); }); $('#p2.img-projects img').mouseout( function() { $(this).stop().animate({ opacity: 1.0 }, 800); $('#p2.project-title').fadeOut(); }); }); </script> The code works fine but does anyone know a way to optimize my code? Thank you

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  • Highlight row of form when input is focussed

    - by Jeepstone
    I have the following piece of Mootools 1.11 code (not upgradable as this is within Joomla), which I want to highlight the form row, when an item within it is focussed. However, this doesn't work. I need to know how to access the parent div of the form item. window.addEvent('domready', function() { var list = $$('#ChronoContact_lensorder div.formrow'); list.each(function(element) { var fx = new Fx.Styles(element, {duration:200, wait:false}); element.addEvent('focus', function(){ fx.start({ 'background-color': '#e6f0f2', color: '#FFF' }); }); element.addEvent('focus', function(){ fx.start({ 'background-color': '#FFF', 'color': '#2F9AD0' }); }); }); }); HTML is: <div class="formrow"> <label for="ud">Uncut Diameter:</label> <input type="text" id="ud" name="ud" /> </div> Thanks

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  • Adding the text area input to a list with jquery

    - by amylynn83
    I am making a shopping list app. When an item is added to the text input, it should be converted into a list item with a class of "tile" and added to the beginning of the list with a class of ".shopping_item_list". Here is my HTML: <section> <h1 class="outline">Shopping List Items</h1> <ul class="shopping_item_list"> <li class="tile">Flowers<span class="delete">Delete</span></li> </ul> </section> My jQuery: $("input[name='shopping_item']").change(function() { var item = $(this).val(); $("<li class='tile'>+ item +</li>").prependTo(".shopping_item_list"); $(".tile").removeClass("middle"); $(".shopping_item_list li:nth-child(3n+2)").addClass("middle"); }); This isn't working, and I can't figure out why. I'm new to jQuery. Also, I need to add the "delete" span to the list item and am not sure how. Thanks for any help you can offer! Edited to add: Thanks to the feedback here, I was able to make it work with: $("input[name='shopping_item']").change(function() { var item = $(this).val(); $("<li class='tile'>" + item + "<span class='delete'>Delete</span>" + " </li>").prependTo(".shopping_item_list"); $(".tile").removeClass("middle"); $(".shopping_item_list li:nth-child(3n+2)").addClass("middle"); }); However, in my jquery, I have functions for the classes "tile" and "delete" that are not working for newly added items. // hide delete button $(".delete").hide(); // delete square $(".tile").hover(function() { $(this).find(".delete").toggle(); }); $(".tile").on("click", ".delete", function() { $(this).closest("li.tile").remove(); $(".tile").removeClass("middle"); $(".shopping_item_list li:nth-child(3n+2)").addClass("middle"); }); // cross off list $(".tile").click(function() { $(this).toggleClass("deleteAction"); }); The new items, which have these classes applied aren't using these functions at all. Do I need to add the functions below the add item? Does the order in which they appear in my js file matter? Do I need to add some kind of function?

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  • Javascript: Access the right scope "under" apply(...)

    - by Chau
    This is a very old problem, but I cannot seem to get my head around the other solutions presented here. I have an object function ObjA() { var a = 1; this.methodA = function() { alert(a); } } which is instantiated like var myObjA = new ObjA(); Later on, I assign my methodA as a handler function in an external Javascript Framework, which invokes it using the apply(...) method. When the external framework executes my methodA, this belongs to the framework function invoking my method. Since I cannot change how my method is called, how do I regain access to the private variable a? My research tells me, that closures might be what I'm looking for.

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  • Calling managed code from unmanaged win32 assembly dll - crash

    - by JustGreg
    I'm developing a serial port dll in win32 assembly (MASM32). It has its own thread checking multiple events and at a specified buffer treshold it'd notify the managed main application by calling a callback function. It just a call with no arguments/return value. At startup the main application stores the callback function's address by calling a function in the dll: pCallBackFunction dd 0 SetCallBackPointer proc pcb:DWORD mov eax, pcb mov pCallBackFunction, eax call DWORD ptr pCallBackFunction ; verify it immediately ret SetCallBackPointer endp The upper function immediately calls back the managed application callback routine for verification purposes. It is working fine. However, when I place the call instruction to other functions in the dll it crashes the application. It doesn't matter if the call is in a simple function or in the threadproc of the dll. For example: OpenPort proc pn:byte,br:dword, inputbuffersize: dword, outputbuffersize:dword, tresholdsize: dword LOCAL dcb: DCB LOCAL SerialTimeOuts: COMMTIMEOUTS call DWORD ptr pCallBackFunction xor eax, eax mov al, pn mov [com_port+3],al etc. etc. will crash at call DWORD ptr pCallBackFunction always. Since I call SetCallBackPointer first to store a valid address in pCallBackFunction, it should have a valid address. My managed app is written in C# and the relevant part is: public partial class Form1 : Form { public delegate void CallBackDelegate(); public static CallBackDelegate mydelegate; [DllImport("serialport.dll")] private static extern void SetCallBackPointer(CallBackDelegate Delegate); [DllImport("serialport.dll")] public static extern int OpenPort(byte com, uint br, uint inbufsize, uint outbufsize, uint treshsize); public Form1() { InitializeComponent(); mydelegate =new CallBackDelegate(CallbackFunction); SetCallBackPointer(mydelegate); unsafe { int sysstat; int hResult; hResult = OpenPort(Convert.ToByte('5'), 9600, 306, 4, 4); } } public static void CallbackFunction() { MessageBox.Show( "CallBack Function Called by Windows DLL"); } The VS debugger reported that the dll had tried to read/write from/to a protected memory address. But when calling SetCallBackPointer there is no such problem. What am I doing wrong here? Any tips would be great!

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  • jquery mouseleave issue when moving too slow

    - by David
    Hello. I am using the jQuery mouseenter and mouseleave events to slide a div down and up. Everything works well except for the mouseleave which doesn't appear to fire ONLY if the mouse of moved off of the div quite slowly. If i move the mouse at a relatively normal or fast speed then it works as expected. Can anyone explain this or provide any info on how to get around this? Code: $(document).ready(function() { $('header').mouseenter(function() { $(this).stop().animate({'top' : '25px'}, 500, function() { $(this).delay(600).animate({'top' : '-50px'}, 500); }); }). mouseleave(function(e) { var position = $(this).position(); if (e.pageY > position.top + $(this).height()) { $(this).stop().delay(600).animate({'top' : '-75px'}, 500) ; } }); });

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  • Master Page and Jquery Problem?

    - by user356787
    Hi all.. I have a page called AddNews.aspx and in codebehind a web method called AddNews(Parameters).. AddNews.aspx page is inherited from a master page.. So i used contentplaceholder. I have a button..It's id is btnSave. Here is jquery code: $(function() { $("[id$='_btnSave']").click(function() { $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", data: $.toJSON(veriler), url: "AddNews.aspx/AddNews", dataType: "json", success: function(result) { $("#result").html('News added'); } , error: function() { alert('Problem'); } }); }); }); </script> Button click dont trigger.. What can i do? Thanks.

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  • How to open popup behind main window (HTML,jQuery)

    - by sara.ma
    I'm new. i have a popup code that when user click anywhere in the HTML page, a popup window shows up: (function () { document.onclick = function () { var sUrl = "http://URL.com"; if (typeof daily_capping == "undefined") var daily_capping = 10; if (typeof capping_minutes == "undefined") var capping_minutes = 60; if (document.cookie.indexOf("_popwin=") === -1) { var ads2day = document.cookie.split("_popwinDaily=")[1]; ads2day = typeof ads2day == "undefined" ? 0 : parseInt(ads2day.split(";")[0]); if (ads2day < daily_capping) { var isMSIE = navigator.userAgent.indexOf("MSIE") != -1 ? !0 : !1, _parent = self, sOptions, popunder; if (top != self) try { top.document.location.toString() && (_parent = top) } catch (err) {} sOptions = "toolbar=no,scrollbars=yes,location=yes,statusbar=yes,menubar=no,resizable=1,width=" + screen.width.toString() + ",height=" + (screen.height - 20).toString() + ",screenX=0,screenY=0,left=0,top=0", popunder = _parent.window.open(sUrl, "rhpop", sOptions); if (popunder) { popunder.blur(); if (isMSIE) { window.focus(); try { opener.window.focus() } catch (err) {} } else popunder.init = function (e) { with(e)(function () { if (typeof window.mozPaintCount != "undefined" || typeof navigator.webkitGetUserMedia == "function") { var e = window.open("about:blank"); e.close() } try { opener.window.focus() } catch (t) {} })() }, popunder.params = { url: sUrl }, popunder.init(popunder) } var now = new Date, popDaily = (new Date(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate(), 23, 59, 59)).toGMTString(); document.cookie = "_popwinDaily=" + (ads2day + 1) + ";expires=" + popDaily + ";path=/"; var popInterval = new Date; popInterval.setTime(popInterval.getTime() + capping_minutes * 60 * 1e3), document.cookie = "_popwin=1;expires=" + popInterval.toGMTString() + ";path=/" } } } })(); but popup is on top. is it possible to make it open behind main page?? is there any lighter popup code for this purpose? thanks guys

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  • .net Generic Calls <T>

    - by Ryan
    I have a function that accepts a generic parameter T that is of type class like so : public Func<T, bool> MyMethod<T>(string paramName, object value) where T : class But when calling the function I do not have direct access to the class that needs to be the parameter. MyMethod<foo>("foo1", "foo2") Is there a way I can get the class foo via other means like reflection so I can use the function?

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  • How to wait for ajax validation to complete before submitting a form?

    - by Jung
    Having a problem where the form submits before the validateUsername function has a chance to complete the username check on the server-side. How do I submit the form only after the validateUsername function completes? Hope this is clear... form.submit(function(){ if (validateUsername() & validateEmail() & validatePassword()) { return true; } else { return false; } }); function validateUsername(){ usernameInfo.addClass("sign_up_drill"); usernameInfo.text("checking..."); var b = username.val(); var filter = /^[a-zA-Z0-9_]+$/; $.post("../username_check.php",{su_username:username.val()},function(data) { if (data=='yes') { username.addClass("error"); usernameInfo.text("sorry, that one's taken"); usernameInfo.addClass("error"); return false; } else if (!filter.test(b)) { username.addClass("error"); usernameInfo.text("no funny characters please"); usernameInfo.addClass("error"); return false; } else { username.removeClass("error"); usernameInfo.text("ok"); usernameInfo.removeClass("error"); return true; } }); }

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  • (C++) What's the difference between these overloaded operator functions?

    - by cv3000
    What is the difference between these two ways of overloading the != operator below. Which is consider better? Class Test { ...// private: int iTest public: BOOL operator==(const &Test test) const; BOOL operator!=(const &Test test) const; } BOOL operator==(const &Test test) const { return (iTest == test.iTest); } //overload function 1 BOOL Test::operator!=(const &Test test) const { return !operator==(test); } //overload function 2 BOOL Test::operator!=(const &Test test) const { return (iTest != test.iTest); } I've just recently seen function 1's syntax for calling a sibling operator function and wonder if writing it that way provides any benefits.

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  • Output Parameter in java

    - by soclose
    Hi, could u give me a sample code of using output parameter in function? I tried to google it but just found it in function. I'd like to use this output value in another function. I will use this code in Android.

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  • PHPUnit test for error thrown with wrong argument type

    - by Spencer Mark
    I'm just starting with PHPUnit and am ok with all assert* methods, but can't figure out how to test for error thrown when the wrong argument is provided to the method - say hinted with array like so: public function(array $list) { } and then tested with null as argument. Could someone please provide an example of how to test for this sort of errors? I've checked quite a few posts on stackoverflow, but couldn't find the answer to this specific issue. Edit Ok - just to give you an idea of what I'm testing - here's the ArrayHelper::removeIfValueIsEmpty() method: public static function removeIfValueIsEmpty(array $array) { if (empty($array)) { return array(); } return array_filter($array, function($value) { return !Helper::isEmpty($value); }); } and now test: class ArrayHelperTest extends PHPUnit_Framework_TestCase { public function testRemoveIfValueIsEmpty() { $this->assertEmpty( \Cmd\Helper\ArrayHelper::removeIfValueIsEmpty(null), '\Cmd\Helper\ArrayHelper::removeIfValueIsEmpty method failed (checking with null as argument)' ); } } This throws an error: PHPUnit_Framework_Error : Argument 1 passed to Cmd\Helper\ArrayHelper::removeIfValueIsEmpty() must be of the type array, null given

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  • php extending but with a new constructor...possible?

    - by Patrick
    I have a class: class test { function __construct() { print 'hello'; } function func_one() { print 'world'; } } what I would like to do is a have a class that sort of extends the test class. I say 'sort of', because the class needs to be able to run whatever function the test class is able to run, but NOT run the construct unless I ask it to. I do not want to override the construct. Anyone has any idea how to achieve this?

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  • How do i call a MouseDoubleClick event? WinForm

    - by acidzombie24
    In my MouseDoubleClick i may run into a case where i would like to call all the controls in a list with MouseDoubleClick. However i cant call MouseDoubleClick, only add/remove events to the chain. How do i call MouseDoubleClick/OnMouseDoubleClick? ATM i workaround the problem since i know the objects MouseDoubleClick function and i pass in the parameters myself calling that specific function. How do i call the event in the case i do not know what function is set to the control MouseDoubleClick

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  • Call/Ret in x86 assembly embedded in C++

    - by SP658
    This is probably trivial, but for some reason I can't it to work. Its supposed to be a simple function that changes the last byte of a dword to 'AA' (10101010), but nothing happens when I call the function. It just returns my original dword __declspec(naked) long function(unsigned long inputDWord, unsigned long *outputDWord) { _asm{ mov ebx, dword ptr[esp+4] push ebx call SET_AA pop ebx mov eax, dword ptr[esp+8] mov dword ptr[eax], ebx } } __declspec(naked) unsigned long SET_AA( unsigned long inputDWord ) { __asm{ mov eax, [esp+4] mov al, 0xAA ret } }

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  • How do interpreters written in C and C++ bind identifiers to C(++) functions

    - by sub
    I'm talking about C and/or C++ here as this are the only languages I know used for interpreters where the following could be a problem: If we have an interpreted language X how can a library written for it add functions to the language which can then be called from within programs written in the language? PHP example: substr( $str, 5, 10 ); How is the function substr added to the "function pool" of PHP so it can be called from within scripts? It is easy for PHP storing all registered function names in an array and searching through it as a function is called in a script. However, as there obviously is no eval in C(++), how can the function then be called? I assume PHP doesn't have 100MB of code like: if( identifier == "substr" ) { return PHP_SUBSTR(...); } else if( ... ) { ... } Ha ha, that would be pretty funny. I hope you have understood my question so far. How do interpreters written in C/C++ solve this problem? How can I solve this for my own experimental toy interpreter written in C++?

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  • Building simple jQuery plugin, need assistance

    - by kirisu_kun
    Hi there, I'm building my first ever jQuery plugin (it's just a simple experiment). Here's what I have so far: (function($){ $.fn.extend({ auchieFader: function(options) { var defaults = { mask: '', topImg : '', } var options = $.extend(defaults, options); return this.each(function() { var o = options; var obj = $(this); var masker = $(o.mask, obj); masker.hover(function () { $(o.topImg).stop().animate({ "opacity": "0" }, "slow"); }, function () { $(o.topImg).stop().animate({ "opacity": "1" }, "slow"); }); }); } }); })(jQuery); I'm then calling the plugin using: $('.fader').auchieFader({mask: ".mask", topImg: ".top"}); If I then add another request say: $('.fader2').auchieFader({mask: ".mask", topImg: ".top"}); Then no matter what instance of my 2 faders I hover both of them will trigger. I know this is because my mask mask and topImg options have the same class - but how can I modify the plugin to allow for these items to have the same class? I know it's probably something really simple, but I'm still finding my way with jQuery and Javascript in general. Any other tips on improving my code would also be greatly appreciated! Cheers, Chris

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  • (gcc) Multi-Dim Array or Double Pointer for Warning-free Compile

    - by paul simmons
    Hi, I have a function, which is called sometimes with regular, sometimes dynamic arrays. If I define the function as function_name(int[10][10] a) and send int** as a parameter, I get a warning. Opposite, if I declare function_name(int** a) and send int[][] as a parameter (after casting) I cannot access to array elements inside function. What is the correctest way?

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  • Why isnt int pow(int base, int exponent) in the standard C++ libraries?

    - by Dan O
    I feel like I must just be unable to find it. Is there any reason that the c++ pow function does not implement the "power" function for anything except floats and doubles? I know the implementation is trivial, I just feel like I'm doing work that should be in a standard library. A robust power function (ie handles overflow in some consistent, explicit way) is not fun to write.

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  • scripting subtlties [closed]

    - by jpmyob
    Possible Duplicates: When to use anonymous JavaScript functions? Is there any difference between var name = function() {} & function name() {} in Javascript? in javascript (and other scripting languages) what is the 'real' difference between these two syntax: a) function myFun(x) { yadda yadda } b) myFun(x) = function { yadda yadda } to a casual observer - no 'real' difference - you still call either as myFun()...and they still return the same thing, so if reference and return are identical - is it a preference or is there some difference in the code parsing engine that treats these two differently - and if so - when would you use one over the other???

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  • jsp in javascript

    - by Pavalesh
    hi I've created a jsp page. In that when i select 1 check-box or both check-box or none, the corresponding text-boxes and list-box must be displayed in the same page. For that i tried of calling a javascipt function when i click the checkbox. The javascript function contain code to display the textboxes. But it didn't work. Since I'm doing this project in struts, I don't know how to get check-box value. And calling of JavaScript function works. But didn't enter into jsp code in JavaScript function.

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