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• Making a non-trivial Image and Video Gallery with a really nice interface

  - by Cawas

  Short part: I'm starting to build an Image and Video Gallery for our intranet. It's pretty much like an image gallery with video thumbnails that play on click. It's just good to keep that in mind because caching and streaming happen in very different ways there. It will serve to browse our reference database, which will also contain searching, tagging and voting. There are 3 features that I need to begin with: Quick preview of thumbnails from each Gallery Fast zoom in / out Animated scrolling Now to the long part, since I can't seem to reduce this: I hope this question belongs here. Maybe people can read this through and identify with it, specially since I expect answers to be pretty specific. The first plan was getting Apple's mobile me gallery as base, because it just so happens to have all those 3 features. If you've never seem it, you should check it out. Move the mouse over each collection and you'll get a nice preview "per pixel". Carousel got a really good scrolling, not just because of the pretty effect. I like it much more than cooliris, but it would be nice to have it in several rows, maybe without the magnifying effect... Then it could be all in the same place with the zoom. The more the features blend-in together, the better. Zooming out with the mouse, scrolling by dragging, once the zoom is really out it becomes a browsing through galleries, with the quick-show preview of each, all properly cached and fast. That'd be perfect. A very compelling interface will be important in this project. Well, my point here is just describing what I need and hope to hear from people with more experience in all that stuff of what's already done and what I'd have to do myself. And how (i.e. which framework to use) to do it. To begin with, I've found a gallery demo and its source code (I think it was from here, but the link seems broken now). I guess it was made in SproutCore, which is what mobileme was based upon. Definitely with JQuery (which already seems a little slow). But I'm still missing two features there: the carousel and the fast zoom (it's just not as slow as the zoom in this demo with cappuccino). Then I've found a supposedly better one with a pretty good and similar zoom, that I'm not sure if it's using any framework and is already in php. Right now it'd be better having just the HTML, no server-side, since I'm building interface first. So, can anyone point directions? There are way too many options! Should I look for another solution closer to what I need, or try and tweak this one? I'm not familiar with any framework at all. Sorry for bringing this question that I will have to answer myself anyway sooner or later and sorry that I couldn't make this smaller. Thanks.

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• In-browser HTML editor for tables?

  - by piquadrat

  I'm developing a website that publishes scientific articles, not as PDF but as HTML. As a input tool for the editorial team, we use TinyMCE for normal text plus a couple of custom plugins for footnotes and citations. But we are not really happy with TinyMCEs table controls. Everything but the most simple tables take way to long to write. Are there any specialized table editing tools for the browser out there?

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• Match returning a string instead of object

  - by Pablo

  This simple regex matching returns a string instead of an object on every browser but the latest firefox... text = "language. Filename: My Old School Yard.avi. File description: File size: 701.54 MB. View on Megavideo. Enter this, here:" name = text.match(/(Filename:)(.*) File /); alert(typeof(name)); as far as i know this the match function is suppose to return an object (Array). Has anyone come across this issue?

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• ajax response byte size

  - by Alex Pacurar

  Im using jQuery's getJSONP and I want to log the duration of the call and the size of the response to be able to have some statistics about the usage of my application. This is a cross domain ajax call, so I need to use JSONP, but as the JSONP call is not done with an XMLHttpRequest object, the complete callback from jquery's ajax doesnt pass the response content. So my question is how to get the response size (content lenght) from a JSONP call. $.ajaxSetup( { complete:function(x,e) { log(x.responseText.length, x.responseText); } } here x is a XMLHttpRequest object for a JSON call , but for JSONP call is undefined.

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• Google Web Toolkit, what can I do with it?

  - by Dr Hydralisk

  I was recently looking into Google Web Toolkit and it seemed really interesting. I was curious what can I really do with it, can I simple register and login system or similar things?

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• How do I select elements based on all their content in jQuery?

  - by Kev

  I have a series of <div/>'s as follows: <div>.co.uk</div> <div>.com</div> <div>.gb.com</div> <div>.uk.com</div> <div>.net</div> How do I select just the divs containing .co.uk, .com, .net. If I use: $('div:contains(".co.uk"), div:contains(".com"), div:contains(".net")`) This causes the .gb.com and .uk.com divs to be selected as well.

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• After dynamically changing a form submit function causes old function to get called once then new fu

  - by cnobile

  I am setting the submit function on a form with jQuery then later in the process I reset the function to something else. What happens is the original function gets called again then the new function when only the new function should have been called. I am sending the requests with AJAX. The first one validated the values on the server then asks if you want to continue. Clicking the submit again should only call the changed function but for some reason both get called simultaneously with a single click. What is happening here? Could jQuery be delaying the the setting of the 2nd function on the form submit?

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• jqGrid - edit only certain rows for an editable column

  - by cosminaru

  Hi, Another jqGrid question: Is it possible to disable editing for certain cells in a column that is marked as editable? From what I've seen, the only options are "all cells are editable" or "no cells are editable". Is there a way to work around this? Thanks, Cosmin

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• Colour manipulation of custom tags in niceEdit HTML editor ( JS / DOM )

  - by Chris

  Hi, I would like to be able to highlight, during typing and in real time, certain custom tags in the format #tag_name# within the text of a nicEdit instance ( http://nicedit.com/ ). My current attempt to implement as close to this as possible revolves around using the blur event of the editor to highlight the tags once the editor loses focus. I then use the following logic to wrap the tags in a span with a highlight class.. htmlEditor.addEvent( "blur", function( ) { str = nicEditors.findEditor( "html_content" ).getContent( ); // Remove existing spans first, leaving just the tag ( this could mess up if the html has been edited directly ) str = str.replace( /(<span class=\"highlight\">)(.[^<]+)(<\/span>)/gi, "$2" ); // Then wrap all instances of a particular tag with the highlight span str = str.replace( /#tag_name#/gi, "<span class='highlight'>#tag_name#</span>" ); nicEditors.findEditor( "html_content" ).setContent( str ); }); This is not ideal as my actual text now contains unwanted spans ( I only want the highlighting for the user's input experience, not to be saved to the database ). Obviously I could remove the spans before saving the text but the whole system is currently open to errors ( If the html is directly edited then other text may get highlighted etc ). What I would like to know is.. Is there any way to directly change the colour of the tags in the editor or DOM without using a mechanism such as this? Perhaps a way of colouring the text in memory rather than changing the HTML ? Any ideas ? Regards Chris P

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• How can I detect when a file download has completed in ASP.NET?

  - by Alexis

  I have a popup window that displays "Please wait while your file is being downloaded". This popup also executes the code below to start the file download. How can I close the popup window once the file download has completed? I need some way to detect that the file download has completed so I can call self.close() to close this popup. System.Web.HttpContext.Current.Response.ClearContent(); System.Web.HttpContext.Current.Response.Clear(); System.Web.HttpContext.Current.Response.ClearHeaders(); System.Web.HttpContext.Current.Response.ContentType = fileObject.ContentType; System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", string.Concat("attachment; filename=", fileObject.FileName)); System.Web.HttpContext.Current.Response.WriteFile(fileObject.FilePath); Response.Flush(); Response.End();

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• Coloring text with css using jQuery

  - by ArtWorkAD

  Hi, I have a little problem adding a class to a span element and so coloring it in order to perform simple validation. Here is my js: function validateKey(){ var length = $('#appkey').val().length; if(length != 8){ $('#appkey').addClass('error'); $('#appKeyInfo').addClass('error'); return false; }else{ $('#appkey').removeClass('error'); $('#appKeyInfo').removeClass('error'); return true; } } And html: <label>KEY</label></br> <input type="text" id="appkey" value=""/></br> <span id="appKeyInfo">Dein App-Key aus 8 Ziffern</span> And the jsfiddle: example Any ideas? UPDATE: coloring of appKeyInfo fails, coloring appkey works. When I remove color:red and type font-weight:bold instead the text is bold on error. when I remove color definition of appKeyInfo the text can be colored red on error, strange thing, but I need a font color for the appKeyInfo

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• Drawing half of a Bezier path in Raphael

  - by Fibericon

  Let's say I have a cubic Bezier path as follows (formatted for use with the Raphael path function): M55 246S55 247 55 248 Just an example. This was taken from my drawing application, where I use the cursor to draw a line when the user holds the mouse button down, kind of like a pencil or marker. I'm using jquery's mousemove event to draw the line between two points every time the user moves the mouse. There is another (the reference point) that is taken before the line is drawn, so that the Bezier curve can be created. Here's my question: is it possible to make Raphael only draw half of a given path? I'm aware of the getSubpath() function, but if my understanding of Bezier curves is correct, it would be rather difficult to calculate the second argument. The problem with the animate function is that it creates double lines (that is, it creates the curved line that I want, and the boxy line around it which should not be shown, possibly because the mouse is being moved faster than the animation can handle). Of course, if my approach itself is flawed in some way (or my understanding of the possible solutions), I'd like to hear it. Any help would be appreciated.

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• Why click event not work when I click a image at runtime?

  - by jin

  Now I am developing a Firefox extension , and when web page I want to create a image at runtime, now I can show the image , but When I click it to invoke a method , why it is not work? it is my code: var _img = doc.createElement("img"); _img.setAttribute("id", "floatImage"); _img.setAttribute("src", "abc.jpg"); _img.setAttribute("onclick", "clickimage()"); document.body.append(_img); function clickimage() { alert("click"); }

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• Why does the jQuery on this page work for Internet Explorer 8, but nothing else?

  - by Ben McCormack

  I made a web page that uses jQuery: http://benmccormack.com/demo/MichaelMassPsalm/Psalm16Mode5.html When you change the selection in the combo box from Higher Key to Lower Key, all of the music images are supposed to change their source to be images that represent the lower key signature. This works great in IE8, but it won't work in Safari, Firefox, or Chrome. Why not? Here's the jQuery code that I'm using: $(document).ready(function () { $("#musicKey").change(function (event) { if ($("#musicKey").val() * 1) { $("img[src*='Low'").each(function (index) { $(this).attr("src", $(this).attr("src").replace("Low", "High")); }); } else { $("img[src*='High'").each(function (index) { $(this).attr("src", $(this).attr("src").replace("High", "Low")); }); } }); });

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• jQuery server ping slowly but surely filling memory?

  - by danspants

  I use the following piece of code to test if our server is running whilst the user is in a page. I've also started adding other functions that grab small amounts of data that are constantly changing and are to be relayed to the user (Files waiting for download, messages, reports etc). I've noticed recently that if I leave any page open (all pages contain the same function), the browser takes up more and more system memory which I can only attribute to this regular task (overnight it reached 1.6 gb). Is there some way of clearing out the data that is being accumulated? Is this normal behaviour? As far as i can tell, every time I call the function it should overwrite the previously retrieved data? function testServer(){ jQuery.ajax({ type:"HEAD", url:"/media/d_arrow_blue.png", error: function(msg) { jQuery.jGrowl("Server Disconnected"); } }); //retrieves count of files awaiting download - move to seperate function jQuery.get("/get_files/",{"type":"count"},function(data) { jQuery("#downloadList").children("div").text(data); }); }; jQuery().doTimeout(6000,function() { testServer(); return true; });

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• Difficulty in Understanding Slideshow script

  - by shining star

  I have taken slide show script from net. But There some functions i cannot understand here is script <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd" > <html lang="en"> <head> <title></title> <script> var interval = 1500; var random_display = 0; var imageDir = "my_images/"; var imageNum = 0; imageArray = new Array(); imageArray[imageNum++] = new imageItem(imageDir + "01.jpg"); imageArray[imageNum++] = new imageItem(imageDir + "02.jpg"); imageArray[imageNum++] = new imageItem(imageDir + "03.jpg"); imageArray[imageNum++] = new imageItem(imageDir + "04.jpg"); imageArray[imageNum++] = new imageItem(imageDir + "05.jpg"); var totalImages = imageArray.length; function imageItem(image_location) { this.image_item = new Image(); this.image_item.src = image_location; return this.image_item.src; } function get_ImageItemLocation(imageObj) { return(imageObj.image_item.src) } alert(imageArray[imageNum].image_item.src); function randNum(x, y) { var range = y - x + 1; return Math.floor(Math.random() * range) + x; } function getNextImage() { if (random_display) { imageNum = randNum(0, totalImages-1); } else { imageNum = (imageNum+1) % totalImages; } var new_image = get_ImageItemLocation(imageArray[imageNum]); //alert(new_image) return(new_image); } function getPrevImage() { imageNum = (imageNum-1) % totalImages; var new_image = get_ImageItemLocation(imageArray[imageNum]); return(new_image); } function prevImage(place) { var new_image = getPrevImage(); document[place].src = new_image; } function switchImage(place) { var new_image = getNextImage(); document[place].src = new_image; var recur_call = "switchImage('"+place+"')"; timerID = setTimeout(recur_call, interval); } </script> </head> <body onLoad="switchImage('slideImg')"> <img name="slideImg" src="27.jpg" width=500 height=375 border=0> <a href="#" onClick="switchImage('slideImg')">play slide show</a> <a href="#" onClick="clearTimeout(timerID)"> pause</a> <a href="#" onClick="prevImage('slideImg'); clearTimeout(timerID)"> previous</a> <a href="#" onClick="switchImage('slideImg'); clearTimeout(timerID)">next </a> </body> </html> here exactly i dont know what does acctually function of get_ImageItemLocation(imageObj) and imageItem(image_location) what does these two functions seperately? Thanks in advance for attention

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• Tinymce mceToggleEditor scroll/focus issue

  - by Lizard

  I have 50+ textareas that I am using tinyMCE with. Instead of loading each one I am just initialising them, then activing them later on request Initialisation tinyMCE.init({ mode : "none", theme : "advanced", theme_advanced_buttons1 : "", theme_advanced_buttons2 : "", theme_advanced_buttons3 : "", theme_advanced_toolbar_location : false, theme_advanced_toolbar_align : "left", theme_advanced_statusbar_location : false, theme_advanced_resizing : true, auto_focus : false }); Edit Observer $('ul span.edit-details').click(function () { var id = this.id; id = id.replace('edit-',''); tinyMCE.execCommand('mceToggleEditor',false,'editor-'+id); }); UPDATE I have also tried $('ul span.edit-details').click(function () { var id = this.id; id = id.replace('edit-',''); if($('#details-'+id).is(":hidden")) { $('#details-'+id).show(); tinyMCE.execCommand('mceAddControl',false,'editor-'+id); } else { $('#details-'+id).hide(); tinyMCE.execCommand('mceRemoveControl',false,'editor-'+id); } }); The problem I have is that when tinyMCE.execCommand('mceToggleEditor',false,'editor-'+id); fires the pages focuses/scrolls to that textarea, even if it is already in the viewport. Any suggestions on how to stop this? Thanks!

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• JS Object this.method() breaks via jQuery

  - by Peter Boughton

  I'm sure there's a simple answer to this, but it's Friday afternoon and I'm tired. :( Not sure how to explain it, so I'll just go ahead and post example code... Here is a simple object: var Bob = { Stuff : '' , init : function() { this.Stuff = arguments[0] } , doSomething : function() { console.log( this.Stuff ); } } And here it is being used: $j = jQuery.noConflict(); $j(document).ready( init ); function init() { Bob.init('hello'); Bob.doSomething(); $j('#MyButton').click( Bob.doSomething ); } Everything works, except for the last line. When jQuery calls the doSomething method it is overriding 'this' and stopping it from working. Trying to use just Stuff doesn't work either. So how do I refer to an object's own properties in a way that allows jQuery to call it, and also allows the object to work with the calling jQuery object? i.e. I would like to be able to do things like this: doSomething : function() { console.log( <CurrentObject>.Stuff + $j(<CallerElement>).attr('id') ); } (Where <CurrentObject> and <CallerElement> are replaced with appropriate names.)

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• jQuery line 67 saying "TypeError: 'undefined' is not a function."

  - by dfdf

  var dbShell; function doLog(s){ /* setTimeout(function(){ console.log(s); }, 3000); */ } function dbErrorHandler(err){ alert("DB Error: "+err.message + "\nCode="+err.code); } function phoneReady(){ doLog("phoneReady"); //First, open our db dbShell = window.openDatabase("SimpleNotes", 2, "SimpleNotes", 1000000); doLog("db was opened"); //run transaction to create initial tables dbShell.transaction(setupTable,dbErrorHandler,getEntries); doLog("ran setup"); } //I just create our initial table - all one of em function setupTable(tx){ doLog("before execute sql..."); tx.executeSql("CREATE TABLE IF NOT EXISTS notes(id INTEGER PRIMARY KEY,title,body,updated)"); doLog("after execute sql..."); } //I handle getting entries from the db function getEntries() { //doLog("get entries"); dbShell.transaction(function(tx) { tx.executeSql("select id, title, body, updated from notes order by updated desc",[],renderEntries,dbErrorHandler); }, dbErrorHandler); } function renderEntries(tx,results){ doLog("render entries"); if (results.rows.length == 0) { $("#mainContent").html("<p>You currently do not have any notes.</p>"); } else { var s = ""; for(var i=0; i<results.rows.length; i++) { s += "<li><a href='edit.html?id="+results.rows.item(i).id + "'>" + results.rows.item(i).title + "</a></li>"; } $("#noteTitleList").html(s); $("#noteTitleList").listview("refresh"); } } function saveNote(note, cb) { //Sometimes you may want to jot down something quickly.... if(note.title == "") note.title = "[No Title]"; dbShell.transaction(function(tx) { if(note.id == "") tx.executeSql("insert into notes(title,body,updated) values(?,?,?)",[note.title,note.body, new Date()]); else tx.executeSql("update notes set title=?, body=?, updated=? where id=?",[note.title,note.body, new Date(), note.id]); }, dbErrorHandler,cb); } function init(){ document.addEventListener("deviceready", phoneReady, false); //handle form submission of a new/old note $("#editNoteForm").live("submit",function(e) { var data = {title:$("#noteTitle").val(), body:$("#noteBody").val(), id:$("#noteId").val() }; saveNote(data,function() { $.mobile.changePage("index.html",{reverse:true}); }); e.preventDefault(); }); //will run after initial show - handles regetting the list $("#homePage").live("pageshow", function() { getEntries(); }); //edit page logic needs to know to get old record (possible) $("#editPage").live("pageshow", function() { var loc = $(this).data("url"); if(loc.indexOf("?") >= 0) { var qs = loc.substr(loc.indexOf("?")+1,loc.length); var noteId = qs.split("=")[1]; //load the values $("#editFormSubmitButton").attr("disabled","disabled"); dbShell.transaction( function(tx) { tx.executeSql("select id,title,body from notes where id=?",[noteId],function(tx,results) { $("#noteId").val(results.rows.item(0).id); $("#noteTitle").val(results.rows.item(0).title); $("#noteBody").val(results.rows.item(0).body); $("#editFormSubmitButton").removeAttr("disabled"); }); }, dbErrorHandler); } else { $("#editFormSubmitButton").removeAttr("disabled"); } }); } Dats my code, awfully long, huh? Well anyways I got most of it from here, however I get an error on line 67 saying "TypeError: 'undefined' is not a function.". I'm using Steroids (phonegap-like) and testing dis on an iPhone simulator. I'm sure it uses some cordova for the database work. Thank you for your help :-)

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• How to display part of an image for the specific width and height?

  - by Brady Chu

  Recently I participated in a web project which has a huge large of images to handle and display on web page, we know that the width and height of images end users uploaded cannot be control easily and then they are hard to display. At first, I attempted to zoom in/out the images to rearch an appropriate presentation, and I made it, but my boss is still not satisfied with my solution, the following is my way: var autoResizeImage = function(maxWidth, maxHeight, objImg) { var img = new Image(); img.src = objImg.src; img.onload = function() { var hRatio; var wRatio; var Ratio = 1; var w = img.width; var h = img.height; wRatio = maxWidth / w; hRatio = maxHeight / h; if (maxWidth == 0 && maxHeight == 0) { Ratio = 1; } else if (maxWidth == 0) { if (hRatio < 1) { Ratio = hRatio; } } else if (maxHeight == 0) { if (wRatio < 1) { Ratio = wRatio; } } else if (wRatio < 1 || hRatio < 1) { Ratio = (wRatio <= hRatio ? wRatio : hRatio); } if (Ratio < 1) { w = w * Ratio; h = h * Ratio; } w = w <= 0 ? 250 : w; h = h <= 0 ? 370 : h; objImg.height = h; objImg.width = w; }; }; This way is only intended to limit the max width and height for the image so that every image in album still has different width and height which are still very urgly. And right at this minute, I know we can create a DIV and use the image as its background image, this way is too complicated and not direct I don't want to take. So I's wondering whether there is a better way to display images with the fixed width and height without presentation distortion? Thanks.

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• How to catch GMail auto-refresh

  - by nameanyone

  I wrote a userscript to highlight the current row in GMail (indicated by the arrow). Unfortunately the highlight will only stay until GMail Inbox is auto-refreshed, which happens quite often. Is there a way to catch that event so I could reapply the highlighting? I don't want to do it on timeout. There is another userscript that does that and it loads up CPU.

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• Problem with adding and removing classes with jQuery when hovering over a list item.

  - by Andrew

  I want to add a class to a list item when I hover over it, and then remove it and add it to a different list item if a different list item is hovered over. Here's what I tried: jQuery - $(document).ready(function() { $("#results").text("Tournaments"); $("#Tournaments").addClass("box-active"); $("#box ul li").hover(function() { var show = $(this).attr('id'); $("#results").text(show); $("#box ul li").each(function() { $(this).removeClass("box-active"); }); $("#box ul li#" + show).addClass("box-active"); }); }); HTML - <div id="box"> <ul> <li id="Tournaments">Tournaments</li> <li id="Join">Join</li> <li id="Forums">Forums</li> <li id="GameBattles">GameBattles</li> <li id="Practice">Practice</li> </ul> <p>Hovering over: <span id="results"></span></p> </div> When I hover over an item, it changes the class, but if I hover over I different one it removes the class over the item I first hovered over, but doesn't add the class to the new item I'm hovering over. Not sure why, and any help would be appreciated.

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• billboard.js is not working in safari

  - by alpdog14

  I have a billboard.js script running on a simple php file and for some reason it works fine in FF and IE but not Safari. I checked source code it and is pulling the content but the scrolling feature does not work when you click. Can someone please help me. Here is the link to try: www.luc.edu/test/cabplan/soc/test.php

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• How can I check if a particular jQuery UI function is available and use a different function if it i

  - by Mark B

  I'm writing a jQuery plugin and I would like my code to take advantage of the jQuery UI show(effect, [options], [speed], [callback]) and hide(effect, [options], [speed], [callback]) functions, which allow you to show and hide elements with a nice animation. However, I'd also like my plugin to degrade gracefully if jQuery UI isn't available, switching back to use the basic, non-animating show() and hide() functions present in the standard jQuery API. I'll need to test for the show and hide functions specifically, as even if jQuery UI is available it could potentially be a custom version, without the Effects components included. At first I thought that I might be able to do something like: if(typeof myelement.show('blind', 'slow') == 'undefined') { myelement.show('blind', 'slow'); } else { myelement.show(); } But of course this doesn't work, as even if UI isn't present, show() is still a function, it just has a different signature—so typeof returns object in either case. So, what's the best way for me to check if jQuery UI is available to my plugin? Any help is much appreciated!

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• Is there any web service for getting tidal information?

  - by thor

  Has anyone come across a web service or plugin/code/calculation for getting information on tides - namely high and low tide times? I only need this information for one location (outwith the US) but I need it on an ongoing basis so a web service that I can hit once a day or something would be ideal.

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