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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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  • How to create nested directories in PhoneGap

    - by Stallman
    I have tried on this, but this didn't satisfy my request at all. I write a new one: var file_system; var fs_root; window.requestFileSystem(LocalFileSystem.PERSISTENT, 1024*1024, onInitFs, request_FS_fail); function onInitFs(fs) { file_system= fs; fs_root= file_system.root; alert("ini fs"); create_Directory(); alert("ini fs done."); } var string_array; var main_dir= "story_repository/"+ User_Editime; string_array= new Array("story_repository/",main_dir, main_dir+"/rec", main_dir+"/img","story_repository/"+ User_Name ); function create_Directory(){ var start= 0; var path=""; while(start < string_array.length) { path = string_array[start]; alert(start+" th created directory " +" is "+ path); fs_root.getDirectory ( path , {create: true, exclusive: false}, function(entry) { alert(path +"is created."); }, create_dir_err() ); start++; }//while loop }//create_Directory function create_dir_err() { alert("Recursively create directories error."); } function request_FS_fail() { alert("Failed to request File System "); } Although the directories are created, the it sends me ErrorCallback:"alert("Recursively create directories error.");" Firstly, I don't think this code will work since I have tried on this: This one failed: window.requestFileSystem( LocalFileSystem.PERSISTENT, 0, //request file system success callback. function(fileSys) { fileSys.root.getDirectory( "story_repository/"+ dir_name, {create: true, exclusive: false}, //Create directory story_repository/Stallman_time. function(directory) { alert("Create directory: "+ "story_repository/"+ dir_name); //create dir_name/img/ fileSys.root.getDirectory { "story_repository/"+ dir_name + "/img/", {create: true, exclusive: false}, function(directory) { alert("Create a directory: "+ "story_repository/"+ dir_name + "/img/"); //check. //create dir_name/rec/ fileSys.root.getDirectory { "story_repository/"+ dir_name + "/rec/", {create: true, exclusive: false}, function(directory) { alert("Create a directory: "+ "story_repository/"+ dir_name + "/rec/"); //check. //Go ahead. }, createError } //create dir_name/rec/ }, createError } //create dir_name/img }, createError); }, //Create directory story_repository/Stallman_time. createError()); } I just repeatedly call fs.root.getDirectory only but it failed. But the first one is almost the same... 1. What is the problem at all? Why does the first one always gives me the ErrorCallback? 2. Why can't the second one work? 3. Does anyone has a better solution?(no ErrorcallBack msg) ps: I work on Android and PhoneGap 1.7.0.

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  • Set text based on Form <select> value

    - by danit
    I have the following <select> in a form: <select style="width: 100px; text-align: center;"> <option value="email">Email</option> <option value="telephone">Phone</option> </select> The default option is Email so the following <input> is show: <p class="email_form">Please supply your Email Address</p> <input onfocus="if(!this._haschanged){this.value=''};this._haschanged=true;" style="width: 270px" type="email" name="email" id="email" value="[email protected]"> However if they choose telephone I want to change the above to ask for a telephone number?

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  • Unique element ID, even if element doesn't have one

    - by Robert J. Walker
    I'm writing a GreaseMonkey script where I'm iterating through a bunch of elements. For each element, I need a string ID that I can use to reference that element later. The element itself doesn't have an id attribute, and I can't modify the original document to give it one (although I can make DOM changes in my script). I can't store the references in my script because when I need them, the GreaseMonkey script itself will have gone out of scope. Is there some way to get at an "internal" ID that the browser uses, for example? A Firefox-only solution is fine; a cross-browser solution that could be applied in other scenarios would be awesome. Edit: If the GreaseMonkey script is out of scope, how are you referencing the elements later? They GreaseMonkey script is adding events to DOM objects. I can't store the references in an array or some other similar mechanism because when the event fires, the array will be gone because the GreaseMonkey script will have gone out of scope. So the event needs some way to know about the element reference that the script had when the event was attached. And the element in question is not the one to which it is attached. Can't you just use a custom property on the element? Yes, but the problem is on the lookup. I'd have to resort to iterating through all the elements looking for the one that has that custom property set to the desired id. That would work, sure, but in large documents it could be very time consuming. I'm looking for something where the browser can do the lookup grunt work. Wait, can you or can you not modify the document? I can't modify the source document, but I can make DOM changes in the script. I'll clarify in the question. Can you not use closures? Closuses did turn out to work, although I initially thought they wouldn't. See my later post. It sounds like the answer to the question: "Is there some internal browser ID I could use?" is "No."

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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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  • Where is the error in this code.

    - by basit74
    Hello, Here is my code snippt. But the code is breaking after inner for loop. But getting no error message. Any idea? Thanks. var lastnames = document.getElementsByClassName('box_nachname'); var firstnames = document.getElementsByClassName('box_vorname'); var teilnehmer = document.getElementsByClassName('select'); observers = []; // iterate over nachname array. for (var i = 0; i < lastnames.length; i++) { // Create an observer instance. observers[i] = new Observer(); // Subscribe oberser object. for(idx in teilnehmer) { if(teilnehmer[idx].id.split("_")[0].toLowerCase() !== "zl") { var anynum = function(element) { observers[i].subscribe(element, updateTeilnehmerSelectbox); }(teilnehmer[idx]); } } //on blur the Observer fire the updated info to all the subscribers. var anynumNachname = function(j, element, value, observer) { cic.addEvent(lastnames[j], 'blur', observer.fire(element, value)); } (i, lastnames[i], lastnames[i].value, observers[i]); cic.addEvent(firstnames[i], 'blur', function(element, value, observer) {observer.fire(element, value)}(lastnames[i], lastnames[i].value, observers[i])); }

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  • Client/JS Framework for "Unsaved Data" Protection?

    - by Kevin Dostalek
    Hey all- we have a typical web application that is essentially a data entry application with lots of screens some of which have some degree of complexity. We need to provide that standard capability on making sure if the user forgets to click the "Save" button before navigating away or closing their browser they get a warning and can cancel (but only when there is unsaved or dirty data). I know the basics of what I've got to do-- in fact I'm sure I've done it all before over the years (tie in to onbeforeunload, track the "dirty" state of the page, etc...) but before I embark on coding this YET AGAIN, does anyone have some suggestions for libraries already out there (free or otherwise) that will help out? Thanks!

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  • How can I structure my MustacheJS template to add dynamic classes based on the values from a JSON file?

    - by JGallardo
    OBJECTIVE To build an app that allows the user to search for locations. CURRENT STATE At the moment the locations listed are few, so they are just all presented when landing on the "dealers" page. BACKGROUND Previously there were only about 50 showrooms carrying a product we sell, so a static HTML page was fine. And displays as But the page size grew to about 1500 lines of code after doing this. We have gotten more and need a scalable solution so that we can add many more dealers fast. In other projects, I have previously used MustacheJS and to load in values from a JSON file. I know the ideally this will be an AJAX application. Perhaps I might be better off with database here? Below is what I have in mind so far, and it "works" up to a certain point, but seems not to be anywhere near the most sustainable solution that can be efficiently scaled. HTML <a id="{{state}}"></a> <div> <h4>{{dealer}} : {{city}}, {{state}} {{l_type}}</h4> <div class="{{icon_class}}"> <ul> <li><i class="icon-map-marker"></i></li> <li><i class="icon-phone"></i></li> <li><i class="icon-print"></i></li> </ul> </div> <div class="listingInfo"> <p>{{street}} <br>{{suite}}<br> {{city}}, {{state}} {{zip}}<br> Phone: {{phone}}<br> {{toll_free}}<br> {{fax}} </p> </div> </div> <hr> JSON { "dealers" : [ { "dealer":"Benco Dental", "City":"Denver", "state":"CO", "zip":"80112", "l_type":"Showroom", "icon_class":"listingIcons_3la", "phone":"(303) 790-1421", "toll_free":null, "fax":"(303) 790-1421" }, { "dealer":"Burkhardt Dental Supply", "City":"Portland", "state":"OR", "zip":"97220", "l_type":"Showroom", "icon_class":"listingIcons", "phone":" (503) 252-9777", "toll_free":"(800) 367-3030", "fax":"(866) 408-3488" } ]} CHALLENGES The CSS class wrapping the ul will vary based on how many fields there are. In this case there are 3, so the class is "listingIcons_3la" The "toll free" number section should only show up if in fact, there is a toll free number. the fax number should only show up if there is a value for a fax number.

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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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  • Animate jquery ui slider handle to specific value

    - by user1159555
    I'm trying to animate a jquery UI handle to a specifiv value. My code is this so far. $("#slider1").slider({ max:350, min:100, animate: 'slow', step:10, animate: "true", value: 0, change: function() { // This setTimeout will allow the slider to animated correctly. setTimeout("$('#slider1').slider('value', 200);", 350); } slide: function(event, ui) { $("#amount").val(ui.value); $(this).find('.ui-slider-handle').html('<div class="sliderControl-label v-labelCurrent">'+ui.value+'</div>'); update(); } }); $('#slider').slider('value', 200); How do I make it so that 1) The handle will go to the specific value on page load and 2) The handle can be freely moved after the page has loaded and the animation has finished. Cheers, Jonah

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  • jqGrid local date manipulation; problem with row ids when deleting and adding new rows

    - by Sam
    I'm using jqGrid as a client side grid input, allowing the user to input multiple records before POSTing all the data back at once. I'm having a problem where if the user has added a few records (say 3 ) the id's for the records will be 1,2,3. if the user deletes record 2, you're left with 1 and 3 for the id of the records. When the user now adds a new records, jqGrid assigns that records the id 3 again since it just seems to count the total records and increments it by one for the new record. This causes problems when selecting rows as now the row id's are 1, 3 and 3. Does anyone know how to access the row ids of records as I could probably use the afterSubmit event and reassign the row id's increasing from 1. ( so after i delete row id 2, this will set the other row id's to 1 and 2) Any other suggestions to solve this problem? Thanks

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  • jQuery: list appended not displaying bullets

    - by Shizhidi
    I have the following html: <!DOCTYPE html> <html> <head> <script src="http://code.jquery.com/jquery-latest.js"></script> </head> <body> <span>not so important</span> <span title="some specific text"><img src="/img/some.gif" /></span> <span title="more specific text">important 1</span> <span title="more specific text">important 2</span> <span title="more specific text">important 3</span> <span title="more specific text"><img src="/img/some.gif" /></span> <ul> <li>example 1</li> <li>example 2</li> <li>example 3</li> <ul> <script> var ul = $('body').append($('<ul>')); $("span[title*='specific text']") .contents() .filter(function(){ return $(this).nodeType != 1; }) .each(function(){ ul.append($('<li>' + $(this).text() + '</li>')); }) </script> </body> </html> I want to retrieve the text within a 'span' whose title attribute contains "specific text", in this case "important 1", "important 2" and "important 3". Then I want to list them below just like the example. However the bullets do not appear, why is that? Any hints would be appreciated!

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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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  • Create an autocompleter like the Facebook status update

    - by Terw
    Hello I'm trying to create a div with contenteditable like the Facebook status update. Then I mean I want to show an autocomplete box when the user have written @. How would you do that. Currently I'm just playing with keypress and check if the keycode = 64. Somehow that works, but it doesn't validate if there's a space before the alfa, or if the user has unfocused the box, then focused it again. Any ideas? Or do you know about any plugin that works something like that? Tnx

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  • Get the text of an li element

    - by Deepak Prasanna
    <ul class="leftbutton" > <li id="menu-selected">Sample 1</li> <li>Sample 2</li> <li>Sample 3</li> <li>Sample 4</li> <li>Sample 5</li> </ul> I want to get the text of the li item which the id="menu-selected". Right now I am doing something like document.getElementById('menu_selected').childNodes.item(0).nodeValue Is there any simpler way of doing the same?

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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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  • I have lots of images on a html page - how can i make certain ones load first (or certain ones load

    - by imlostmike
    Hi, i have a page with the main content area being big thumbnails, but elsewhere on the page are about 100-200 other (smaller) thumbs that are not important but must still show. What ways do i have to make the main ones show first (or the unimportant ones show last)? I was thinking of these ways: JS load: on page load (once it has finished loading), use a jquery's append() (or whatever other way) to write the html with the image code Set all unimportant images inside a div with style="display:none;". Then once the page has loaded, use JS to set it as visible what do you think is the best way?

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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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  • What's the difference between reflow and repaint?

    - by Jon Raasch
    I'm a little unclear on the difference between reflow + repaint (if there's any difference at all) Seems like reflow might be shifting the position of various DOM elements, where repaint is just rendering a new object. E.g. reflow would occur when removing an element and repaint would occur when changing its color. Is this true?

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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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  • 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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  • Jquery table cell

    - by Parhs
    Hello...This code produces a mess... What am i doing wrong??? cell=$("<td>"); if(normal.exam_type=="Exam_Boolean") { var input=cell.append("<input>").last(); input.attr("type","hidden"); input.attr("name","exam.exam_Normal['" +normal_id_unique + "'].boolean_v"); input.attr("value",normal.normal_boolean);

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