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  • Resizing canvas, where's the problem?

    - by Noor
    I'll post a link since theres to much to post here: http://hem.bredband.net/noor/canvas.htm My goal is to make the picture fit inside the window with the width of the image being the same as the window, even after resize. If the pictures height becomes to big for the window then the picture should resize itself according to the height and not the width. Somewhere along my code there is something wrong.. forgive me if this is stupid, i am still learning.. Thanks!

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  • jQuery: tabs where the tab/content can be linked to

    - by Ricardo Zea
    My issue is simple. I have already implemented a tab system, and I'd probably spend more time implementing another one with the solution I need, than giving a shot at adapting the code I have, and learn something while asking :) My problem is that the tabs can't be linked to, I need to be able to link to a tab from another website or page, and have that tab get selected upon page load. ie: I have three tabs showing different products, by default tab 1 is active/selected when the page loads. From the home page I want to link to tab 2 but I can't link to tab 2 because it doesn't get selected. Not sure if that makes sense. Tabs: <ul> <li><a href="products.php">Product 1</a></li> <li><a href="products.php">Product 2</a></li> <li><a href="products.php">Product 3</a></li> </ul> <div class="tab_container"> <div id="tab1" class="tab_content">Product 1 info...</div> <div id="tab2" class="tab_content">Product 2 info...</div> <div id="tab3" class="tab_content">Product 3 info...</div> </div> my jQuery: $(document).ready(function() { //Default Action $(".tab_content").hide(); $("ul.tabs li:first").addClass("active").show(); $(".tab_content:first").show(); //On Click Event $("ul.tabs li").click(function() { $("ul.tabs li").removeClass("active"); $(this).addClass("active"); $(".tab_content").hide(); var activeTab = $(this).find("a").attr("href"); $(activeTab).fadeIn(); return false; }); }); Is there a way this code can be adapted to be able to link to any tab from anywhere and have that tab get selected when the page loads? Thanks in advance.

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  • Why .data() function of jQuery is better to prevent memory leaks?

    - by burak ozdogan
    Hi, Regarding to jQuery utility function jQuery.data() the online documentation says: "The jQuery.data() method allows us to attach data of any type to DOM elements in a way that is safe from circular references and therefore from memory leaks. " Why to use: document.body.foo = 52; can result a memory leak -or in what conditions- so that I should use jQuery.data(document.body, 'foo', 52); Should I ALWAYS prefer .data() instead of using expandos in any case? (I would appreciate if you can provide an example to compare the differences) Thanks, burak ozdogan

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  • Detecting whether user stayed after prompting onBeforeUnload

    - by Daniel Magliola
    In a web app I'm working on, I'm capturing onBeforeUnload to ask the user whether he really wants to exit. Now, if he decides to stay, there are a number of things I'd like to do. What I'm trying to figure out is that he actually chose to stay. I can of course declare a SetTimeout for "x" seconds, and if that fires, then it would mean the user is still there (because we didn't get unloaded). The problem is that the user can take any time to decide whether to stay or not... I was first hoping that while the dialog was showing, SetTimeout calls would not fire, so I could set a timeout for a short time and it'd only fire if the user chose to stay. However, timeouts do fire while the dialog is shown, so that doesn't work. Another idea I tried is capturing mouseMoves on the window/document. While the dialog is shown, mouseMoves indeed don't fire, except for one weird exception that really applies to my case, so that won't work either. Can anyone think of other way to do this? Thanks! (In case you're curious, the reason capturing mouseMove doesn't work is that I have an IFrame in my page, containing a site from another domain. If at the time of unloading the page, the focus is within the IFrame, while the dialog shows, then I get the MouseMove event firing ONCE when the mouse moves from inside the IFrame to the outside (at least in Firefox). That's probably a bug, but still, it's very likely that'll happen in our case, so I can't use this method).

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  • Scriptaculous Drag: How do I offset the dragging element?

    - by Angus Croll
    This is an age old problem - but now I'm using scriptaculous its come back to haunt me. When dragging a tree node over other tree nodes I want mouseover to fire for each node. So I want to position the dragging thing so that its top-left is slightly offset from the mousepointer I could reposition constantly in the onDrag handler but this is jerky and slow can anyone help? - thanks

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  • Why can't I override WP's 'excerpt_more' filter via my child theme functions?

    - by Osu
    I can't seem to get my functions to work for changing the excerpt_more filter of the Twenty Eleven parent theme. I suspect it might actually be add_action( 'after_setup_theme', 'twentyeleven_setup' ); that's the problem, but I've even tried remove_filter( 'excerpt_more', 'twentyeleven_auto_excerpt_more' ) to get rid Twenty Eleven's function and still my functions aren't changing anything... Can you help? Here's the functions.php code in full: http://pastie.org/3758708 Here's the functions I've added to /mychildtheme/functions.php function clientname_continue_reading_link() { return ' <a href="'. esc_url( get_permalink() ) . '">' . __( 'Read more... <span class="meta-nav">&rarr;</span>', 'clientname' ) . '</a>'; } function clientname_auto_excerpt_more( $more ) { return ' &hellip;' . clientname_continue_reading_link(); } add_filter( 'excerpt_more', 'clientname_auto_excerpt_more' ); Thanks, Osu

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  • Highstock Chrome/Firefox/Opera

    - by Matthias
    Is there any particular reason that this HighStock chart: var chart; $(function() { chart = new Highcharts.StockChart({ chart: { renderTo: 'container' }, title: { text: 'Total balance over time' }, xAxis: { type: 'datetime', maxZoom: 7 * 24 * 3600000, // one week title: { text: null } }, yAxis: { title: { text: 'Balance' }, startOnTick: false, showFirstLabel: false }, tooltip: { shared: true }, series: [{ type: 'area', name: 'Account balance', pointInterval: 14 * 3600 * 1000, pointStart: Date.UTC(2012, 3, 11), data: [ 0.7809, 0.7827, 0.7848, 0.785, 0.7873, 0.7894, 0.7907, 0.7909, 0.7947, 0.7987, 0.799, 0.7927, 0.79, 0.7878, 0.7878, 0.7907, 0.7922, 0.7937, 0.786, 0.787, 0.7838, 0.7838, 0.7837, 0.7836, 0.7806, 0.7825, 0.7798, 0.777, 0.777, 0.7772, 0.7793, 0.7788, 0.7785, 0.7832, 0.7865, 0.7865, 0.7853, 0.7847, 0.7809, 0.778, 0.7799, 0.78, 0.7801, 0.7765, 0.7785, 0.7811, 0.782, 0.7835, 0.7845, 0.7844, 0.782, 0.7811, 0.7795, 0.7794, 0.7806, 0.7794, 0.7794, 0.7778, 0.7793, 0.7808, 0.7824, 0.787, 0.7894, 0.7893, 0.7882, 0.7871, 0.7882, 0.7871, 0.7878, 0.79, 0.7901, 0.7898, 0.7879, 0.7886, 0.7858, 0.7814, 0.7825, 0.7826, 0.7826, 0.786, 0.7878, 0.7868, 0.7883, 0.7893, 0.7892, 0.7876, 0.785, 0.787, 0.7873, 0.7901, 0.7936, 0.7939, 0.7938, 0.7956, 0.7975, 0.7978, 0.7972, 0.7995, 0.7995 ] }] }); }); is rendered without any problems in Opera, but not working in Chrome or Firefox? I'm also using some HighChart pie charts. Those are rendered without any issues on all browsers. All of the demos on the HighStock Demo Gallery are working without problems.

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  • Register javascript array from code behind in facebook

    - by Ahmy
    I need to set a javascript array from code behind using C# in Asp.Net2008 the problem now is that when i register the array using the following C# code: string ArrVal = ""; string Sep = ""; for (int i = 0; i < 17; i++) { ArrVal += Sep + FilesCount[i].ToString(); Sep = ","; } Page.ClientScript.RegisterArrayDeclaration("FilesArr", ArrVal); And the Client code is : var FileName = FilesArr[0]; in any web application it is working well but at my application that is released in the facebook platform the javascript code doesn't see the array but in ordinary web application the javscript code see the registered array can any one tell me why this problem occurrs ? Thanks in advance for any reply and trial.

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  • .uploadifySettings not working as expected

    - by marcgg
    I'm using uploadify and the function to change the settings doesn't seem to be working. I'm basing my code from the following example: #(‘#someID’).uploadifySettings(’scriptData’, {‘name’ : some.val()}); So here's what I'm doing: // INITIALIZATION $("#"+elementId).uploadify({ // other data "scriptData": { "token": token } }); Later on I want to update the scriptData: $("#"+elementId).uploadifySettings("scriptData",{"token": "pleasework"}); ... but this is not working, it's still using the scriptData set during the initialization. What am I doing wrong?

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  • Help with this code.

    - by karthick6891
    Heading ##Hey guys i need help with this code.The short version is,i have to do match the follwing by using drag and drop in jquery and later i need to show a message whether it is right or wrong. var output = "Wrong"; var old_item ; var new_item ; var newObjArray=[]; $(function() { var $gallery = $('.gallery'), $trash = $('.trash'); $('div',$gallery).draggable({ revert: 'invalid', containment: 'document', helper: 'clone', cursor: 'move', }); // let the trash be droppable, accepting the gallery items $trash.droppable({ //accept: '#gallery div', //activeClass: 'ui-state-highlight', tolerance: 'touch', drop: function(ev, ui) { new_item = ui.draggable; $(this).droppable("option","activeClass",'.ui-state-highlight'); if(contains(newObjArray,ui.draggable)) { newObjArray.pop(ui.draggable); } newObjArray.push(ui.draggable); deleteImage(ui.draggable,$(this)); } }); // let the gallery be droppable as well, accepting items from the trash $gallery.droppable({ //accept: '#trash li', activeClass: 'custom-state-active', drop: function(ev, ui) { recycleImage(ui.draggable); } }); // image deletion function function deleteImage($item,element) { var $list; $item.fadeOut(10,function() { if($(".ui-widget-content", element).length <1){ old_item = $item; $list = $('<div class="gallery ui-helper-reset"/>').appendTo(element); //$('ul',$trash).length ? $('ul',$trash) : $('<ul class="gallery ui-helper-reset"/>').appendTo($trash); $item.appendTo($list).fadeIn(10); } else{ recycleImage($(".ui-widget-content",element)); $list = $('<div class="gallery ui-helper-reset"/>').appendTo(element); $item.appendTo($list).fadeIn(10); old_item = $item; } }); } //check for given answer // image recycle function function recycleImage($item) { $item.fadeOut(10,function() { $item.find("img").end().appendTo($gallery).fadeIn(10); }); } // image preview function, demonstrating the ui.dialog used as a modal window }); function checkOrder(){ if(newObjArray==null){ } else if(newObjArray!=null){ if(newObjArray[0].attr("id")=="5"&& newObjArray[1].attr("id")=="1" && newObjArray[2].attr("id")=="3" && newObjArray[3].attr("id")=="2" && newObjArray[4].attr("id")=="4"){ parent.parent.increaseCorrectA(); } else{ parent.parent.increaseWrongA(); } } } function contains(a, obj) { var i = a.length; while (i--) { if (a[i] === obj) { return true; } } return false; } I am calling the function checkOrder() from the html page after the matching of items is over.What happens here is i have just stored the user responses on the draggable over droppable in an array,based on it's position.It is a bad practice cause,i am saying whether it's right or wrong through its position in the array.The only thing i can do is get the draggable's id present in the droppable.But i dont know how to get that inside the function checkOrder().Any ideas please?

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  • Is it possible to execute a function in Mongo that accepts any parameters?

    - by joshua.clayton
    I'm looking to write a function to do a custom query on a collection in Mongo. Problem is, I want to reuse that function. My thought was this (obviously contrived): var awesome = function(count) { return function() { return this.size == parseInt(count); }; } So then I could do something along the lines of: db.collection.find(awesome(5)); However, I get this error: error: { "$err" : "error on invocation of $where function: JS Error: ReferenceError: count is not defined nofile_b:1" } So, it looks like Mongo isn't honoring scope, but I'm really not sure why. Any insight would be appreciated. To go into more depth of what I'd like to do: A collection of documents has lat/lng values, and I want to find all documents within a concave or convex polygon. I have the function written but would ideally be able to reuse the function, so I want to pass in an array of points composing my polygon to the function I execute on Mongo's end. I've looked at Mongo's geospatial querying and it currently on supports circle and box queries - I need something more complex.

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  • Uncaught TypeError: Cannot read property 'length' of undefined

    - by AnApprentice
    I'm working to built a contact list that is grouped by the first letter of the contact's last name. After a succesfull ajax request, the contact is pushed to addContact: Ajax success: ko.utils.arrayForEach(dataJS.contactList, function(c) { contactsModel.addContact(c); }); contactsModel.addContact: //add a contact in the right spot under the right letter contactsModel.addContact = function(newContact) { //grab first character var firstLetter = (newContact.lname || "").charAt(0).toUpperCase(); //if it is a number use # if (!isNaN(firstLetter)) { firstLetter = "#"; } //do we already have entries for this letter if (!this.letterIndex[firstLetter]) { //new object to track this letter's contacts var letterContacts = { letter: firstLetter, contacts: ko.observableArray([]) }; this.letterIndex[firstLetter] = letterContacts; //easy access to it //put the numbers at the end if (firstLetter === "#") { this.contactsByLetter.push(letterContacts); } else { //add the letter in the right spot for (var i = 0, lettersLength = this.contactsByLetter().length; i < lettersLength; i++) { var letter = this.contactsByLetter()[i].letter; if (letter === "#" || firstLetter < letter) { break; } } this.contactsByLetter.splice(i, 0, letterContacts); } } var contacts = this.letterIndex[firstLetter].contacts; //now we have a letter to add our contact to, but need to add it in the right spot var newContactName = newContact.lname + " " + newContact.fname; for (var j = 0, contactsLength = contacts().length; j < contactsLength; j++) { var contactName = contacts()[j].lName + " " + contacts()[j].fName; if (newContactName < contactName) { break; } } //add the contact at the right index contacts.splice(j, 0, newContact); }.bind(contactsModel); The contacts json object from the server looks like this: { "total_pages": 10, "page": page, "contactList": [{ "photo": "http://homepage.mac.com/millhouse/Family%20Tree/images/PersonListIcon.png", "lname": "Bond", "id": 241, "fname": "James", "email": "[email protected]"}, While this works in jsfiddle, when I try it locally, I get the following error during the first push to addContact: Uncaught TypeError: Cannot read property 'length' of undefined jQuery.jQuery.extend._Deferred.deferred.resolveWithjquery-1.5.1.js:869 donejquery-1.5.1.js:6591 jQuery.ajaxTransport.send.callbackjquery-1.5.1.js:7382 Ideas? Thanks

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  • AJAX Beginner: If then statement

    - by dassouki
    In menu.html, I have my menu items(a href links), let's call them, menu_1, menu_2, .... In map.js displays the contents of a map, it calls an API to display some layers and maps. I have a lot of maps to show but i only want to call the api once. Using AJAX, I was wondering if it's possible to have an if/then or select/case in my js, so that if menu_1 is clicked, then implement map_1 etc. without having the page to reload. The only way I thought I could do this is using Post/get .. so when you click on menu_1 it takes you to page.php?page_id=1 . JS will read that and display the map. I'm new to JS and AJAX so please feel free to butcher me

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  • Dual slider control with custom skin

    - by Ryan French
    Hi All, I'm currently trying to create a page for users to select two points from a range, using a slide control. The first point in the range is when an alert will be sent to the user, the second point is a max limit. What I would like to do is have the bar colored green from the 0 point to the first slider point, then orange between the two sliders, and lastly red from the second slider up to the other end of the bar. Does anyone know of an easy was I can do this or of a slider control that can be skinned to do this?

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  • Another IE Issue with AJAX

    - by Nik
    Alright, This code works in every browser except IE (again, to be expected). The code is supposed to refresh based on setInterval, and does so normally in all other browsers except IE, which just doesn't refresh. Can you spot the problem? var nick = document.getElementById("chatnick").value; var sessid = document.getElementById("sessid").value; var room = document.getElementById("roomid").value; function user_read() { $.ajax({ type: "GET", url: "methods.php", data: {method: "u", room: room}, dataType: "html", success: function (data, status, xhr) { $("#userwindow").html(data); setTimeout(user_read, 10000); } }); } function ajax_read() { $.ajax({ type: "GET", url: "methods.php", data: {method: "r", room: room}, dataType: "html", success: function (data, status, xhr) { $("#chatwindow").html(data); setTimeout(ajax_read, 400); } }); } function submit_msg() { var msg = document.getElementById("chatmsg").value; $.ajax({ type: "GET", url: "methods.php", data: {method: "w", room: room, m: msg, n: nick, sessid: sessid}, dataType: "html", success: function (data, status, xhr) { } }); document.getElementById("chatmsg").value = ""; } function keyup(arg1) { if (arg1 == 13) submit_msg(); } setTimeout(function(){ajax_read();}, 400); user_read();

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  • Named arguments in Mathematica.

    - by dreeves
    What's the best/canonical way to define a function with optional named arguments? To make it concrete, let's create a function foo with named arguments a, b, and c, which default to 1, 2, and 3, respectively. For comparison, here's a version of foo with positional arguments: foo[a_:1, b_:2, c_:3] := bar[a,b,c] Here is sample input and output for the named-arguments version of foo: foo[] --> bar[1,2,3] foo[b->7] --> bar[1,7,3] foo[a->6, b->7, c->8] --> bar[6,7,8] It should of course also be easy to have positional arguments before the named arguments.

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  • Best way to detect that HTML5 <canvas> is not supported

    - by brainjam
    The standard way to deal with situations where the browser does not support the HTML5 <canvas> tag is to embed some fallback content, usually a polite version (and sometimes a less polite version) of <canvas>Your browser sucks</canvas> But the rest of the page remains the same, which may be inappropriate or misleading. I'd like some way of detecting canvas non-support so that I can present the rest of my page accordingly. What would you recommend?

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  • modify this code .. please help me?

    - by Sam
    i wana modify this code from static choices to dynamic this for 3 choices var PollhttpObject=null; function DoVote() {if(document.getElementById('PollRadio1').checke d)DoVote_Submit(1);else if(document.getElementById('PollRadio2').checked)DoVote_Submit(2);else if(document.getElementById('PollRadio3').checked)DoVote_Submit(3);else alert('?????: ?????? ?????? ??? ?????????? ??????? ?? ????? ??? ?? ???????');return false;} function DisbalePoll(TheCase) {document.getElementById('VoteBttn').onclick=function(){alert('!?????? ??? ?? ??????? ??????');} document.getElementById('PollRadio1').disabled='true';document.getElementById('PollRadio2').disabled='true';document.getElementById('PollRadio3').disabled='true';if(TheCase=='EXPIRED') {document.getElementById('VoteBttn').src='images/design/VoteBttn_OFF.jpg';document.getElementById('ResultBttn').src='images/design/ResultsBttn_OFF.jpg';document.getElementById('VoteBttn').onclick='';document.getElementById('ResultBttn').onclick='';document.getElementById('ResultBttn').style.cursor='';document.getElementById('VoteBttn').style.cursor='';}} function DoVote_Submit(VoteID) {if(VoteID!=0)DisbalePoll();try{PollhttpObject=getHTTPObject();if(PollhttpObject!=null) {PollhttpObject.onreadystatechange=PollOutput;PollhttpObject.open("GET","Ajax.aspx?ACTION=POLL&VOTEID="+ VoteID+"&RND="+ Math.floor(Math.random()*10001),true);PollhttpObject.send(null);}} catch(e){} return false;} function PollOutput(){if(PollhttpObject.readyState==4) {var SearchResult=PollhttpObject.responseText;document.getElementById('PollProgress').style.display='none';document.getElementById('PollFormDiv').style.display='block';if(SearchResult.length=2&&SearchResult.substr(0,2)=='OK') {var ReturnedValue=SearchResult.split("#");document.getElementById('PollBar1').style.width=0+'px';document.getElementById('PollBar2').style.width=0+'px';document.getElementById('PollBar3').style.width=0+'px';document.getElementById('PollRate1').innerHTML="0 (0%)";document.getElementById('PollRate2').innerHTML="0 (0%)";document.getElementById('PollRate3').innerHTML="0 (0%)";window.setTimeout('DrawPollBars(0, '+ ReturnedValue[1]+', 0, '+ ReturnedValue[2]+', 0, '+ ReturnedValue[3]+')',150);} else if(SearchResult.length=2&&SearchResult.substr(0,2)=='NO') {alert("?????: ??? ??? ???????? ?????");}} else {document.getElementById('PollProgress').style.display='block';document.getElementById('PollFormDiv').style.display='none';}} function DrawPollBars(Bar1Var,Bar1Width,Bar2Var,Bar2Width,Bar3Var,Bar3Width) {var TotalVotes=parseInt(Bar1Width)+parseInt(Bar2Width)+parseInt(Bar3Width);var IncVal=parseFloat(TotalVotes/10);var NewBar1Width=0;var NewBar2Width=0;var NewBar3Width=0;var Bar1NextVar;var Bar2NextVar;var Bar3NextVar;if(parseInt(parseInt(Bar1Var)*200/TotalVotes)0)NewBar1Width=parseInt(Bar1Var)*200/TotalVotes;else if(Bar1Var0)NewBar1Width=1;else NewBar1Width=0;if(parseInt(parseInt(Bar2Var)*200/TotalVotes)0)NewBar2Width=parseInt(Bar2Var)*200/TotalVotes;else if(Bar2Var0)NewBar2Width=1;else NewBar2Width=0;if(parseInt(parseInt(Bar3Var)*200/TotalVotes)0)NewBar3Width=parseInt(Bar3Var)*200/TotalVotes;else if(Bar3Var0)NewBar3Width=1;else NewBar3Width=0;document.getElementById('PollBar1').style.width=NewBar1Width+'px';document.getElementById('PollBar2').style.width=NewBar2Width+'px';document.getElementById('PollBar3').style.width=NewBar3Width+'px';document.getElementById('PollRate1').innerHTML=parseFloat(Bar1Var).toFixed(0)+" ("+ parseFloat(parseFloat(Bar1Var)/TotalVotes*100).toFixed(1)+"%)";document.getElementById('PollRate2').innerHTML=parseFloat(Bar2Var).toFixed(0)+" ("+ parseFloat(parseFloat(Bar2Var)/TotalVotes*100).toFixed(1)+"%)";document.getElementById('PollRate3').innerHTML=parseFloat(Bar3Var).toFixed(0)+" ("+ parseFloat(parseFloat(Bar3Var)/TotalVotes*100).toFixed(1)+"%)";if(Bar1Var!=Bar1Width||Bar2Var!=Bar2Width||Bar3Var!=Bar3Width) {if(parseFloat(Bar1Var)+IncVal<=parseInt(Bar1Width))Bar1NextVar=parseFloat(Bar1Var)+IncVal;else Bar1NextVar=Bar1Width;if(parseFloat(Bar2Var)+IncVal<=parseInt(Bar2Width))Bar2NextVar=parseFloat(Bar2Var)+IncVal;else Bar2NextVar=Bar2Width;if(parseFloat(Bar3Var)+IncVal<=parseInt(Bar3Width))Bar3NextVar=parseFloat(Bar3Var)+IncVal;else Bar3NextVar=Bar3Width;window.setTimeout('DrawPollBars('+ Bar1NextVar+', '+ Bar1Width+', '+ Bar2NextVar+', '+ Bar2Width+', '+ Bar3NextVar+', '+ Bar3Width+')',80); }}

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