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  • How atomic *should* I make an Ajax form?

    - by b. e. hollenbeck
    I have some web forms that I'm bringing over with AJAX, and as I was dealing with the database on the back end, I thought that it might be easier to just handle each input on the form atomically with AJAX, saving the form in 'real time' as the user edits it. The forms are ~20 fields of administrative settings. Would this create massive overhead with the app, cause it to be error-prone, or is this a feasible idea? Of course, contingent operations (like a checkbox that then requires a text entry) would be held until the textbox gained and lost focus. Comments?

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  • Ordering DOM elements

    - by sonofdelphi
    Given two DOM elements, say a and b, how can we determine which comes first in the document? I'm implementing drag and drop for a set of elements. And the elements can be selected in any order, but when they are dragged, these elements need to be moved in the "correct" order.

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  • How to accurately resize nested elements with ems and font-size percentage?

    - by moonDogDog
    I have a carousel with textboxes for each image, and my client (who knows nothing about HTML) edits the textboxes using a WYSIWYG text editor. The resulting output is akin to your worst nightmares; something like: <div class="carousel-text-container"> <span style="font-size:18pt;"> <span style="font-weight:bold;"> Lorem <span style="font-size:15pt:">Dolor</span> </span> Ipsum <span style="font-size:19pt;"><span>&nbsp;<span>Sit</span>Amet</span> </span> </div> This site has to be displayed at 3 different sizes to accomodate smaller monitors, so I have been using CSS media queries to resize the site. Now I am having trouble resizing the text inside the textbox correctly. I have tried using jQuery.css to get the font size of each element in px, and then convert it to em. Then, by setting a font-size:x% sort of declaration on .carousel-text-container, I hoped that that would resize everything properly. Unfortunately, there seems to be a recursive nature with how font-size is applied in ems. That is, .example is not resized properly in the following because its parent is also influencing it <span style="font-size:2em;"> Something <span class="example" style="font-size:1.5em;">Else</span> </span> How can I resize everything reliably and precisely such I can achieve a true percentage of my original font size, margin, padding, line-height, etc. for all the children of .carousel-text-container?

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  • why does backbone not send the delete?

    - by Nippysaurus
    I have a very basic backbone (sample) application which just creates and destroys model items. When the model is created the object is persisted with a POST to the web server, but when the model is destroyed there is no DELETE sent to the server? Any idea why this might be? very basic model: window.User = Backbone.Model.extend({ urlRoot: 'users' }); my test code just to create and delete the model: var model = null; $(".add").click(function(){ if (model == null) { model = new window.User; model.set({name: 'meeee'}); model.save(); } }); $(".remove").click(function(){ if (model != null) { model.destroy(); } }); The JSON response when creating the model seems good too:

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  • jQuery: How to fire event when all asynchronous calls return?

    - by Jeremy
    I have a jQuery application that loads data from five asynchronous server calls. I do not want to display any data until all five calls return. (I plan on displaying a Loading message until that happens.) How can I detect when all five calls have returned? I considered having each callback method increment a variable (using jQuery's data() method, perhaps) and then waiting for the value to become 5. (I am not sure yet how I would listen for that event.) I do not think this is a very good solution, however. What would happen if two calls return at the same time? Is there a better way to do this?

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  • Question about A Sketching Website on the IPAD, Dragging and Touching

    - by pfunc
    I've been testing out the new functionality of html5 and js to create a sketching site. I've been looking into this for a possible client that wants their site to be ipad accessible, but also have drawing features on it. So i created a rough experiment where you can drag your mouse across a screen to draw lines. I went to test it on an ipad and realized this doesn't work. Why? because dragging on an ipad is reserved for actually dragging the screen around. Is there something you can do to get around this? I'm sure this could be done if made for an app, but what about just a normal website.

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  • How to implement scrolling content widget

    - by alokswain
    Example website is http://www.wikihow.com/Main-Page, check the "Recent Changes" heading on the right side. I am really amazed with the implementation of such scroll bars. Google also uses something very similar to this. Can someone give me some idea how to do this using jquery.

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  • Point data structure for a sketching application

    - by bebraw
    I am currently developing a little sketching application based on HTML5 Canvas element. There is one particular problem I haven't yet managed to find a proper solution for. The idea is that the user will be able to manipulate existing stroke data (points) quite freely. This includes pushing point data around (ie. magnet tool) and manipulating it at whim otherwise (ie. altering color). Note that the current brush engine is able to shade by taking existing stroke data in count. It's a quick and dirty solution as it just iterates the points in the current stroke and checks them against a distance rule. Now the problem is how to do this in a nice manner. It is extremely important to be able to perform efficient queries that return all points within given canvas coordinate and radius. Other features, such as space usage, should be secondary to this. I don't mind doing some extra processing between strokes while the user is not painting. Any pointers are welcome. :)

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  • spidermonkey using JS_CallFunction for static function

    - by supersuraccoon
    JS_CallFunctionName can call a method of an object by name: JSObject* obj; JS_CallFunctionName(cx, obj, "doSomething", argc, vp, retVal); The code above works fine if the "doSomething" is a function declared in the prototype of the "obj". What I want to know is if there is a way to call a function that is a "class function". I tried: if(JS_HasProperty(getGlobalContext(), getGlobalObject(), "ClassToGet", &b)) { print("OK"); } and the output is "OK". But when tried: JS_GetProperty(getGlobalContext(), getGlobalObject(), "ClassToGet", &jsOwner); if (jsOwner != JSVAL_VOID) { } the jsOwner is a JSVAL_VOID. Maybe there is a function in SpiderMonkey can execute function in a JSClass ? Any suggestion will be appreciated, thanks :)

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  • Html combo box to database record Id

    - by LanguaFlash
    I'm fairly sure there has to be a simple solution to my problem, but I am a new web developer and can't quite figure it out. On my page I have a combo box whose values are filled from my database. When the user submits the form, how to I go about converting those values back to the record numbers in the database? Up to now I have been just doing a sort of reversed lookup in my database to try to get the record's ID. This has quite a few obvious flaws and I am sure that there has to be a better way. I am used to MS Forms combo boxes where the record data and ID are never separated. But in the case of a web form, I have no way to do multiple columns in the combo box like I am used to. Thanks! Jeff

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  • Can jQuery animate() behave differently for specific elements within my selection?

    - by Sune Rasmussen
    I have a selection of elements in a jQuery object. I want to animate their font sizes, but as I have both the headlines and various paragraphs in the selection, they should be animated slightly differently, as the headlines should end up with a larger font size than the paragraphs. I already have this information stored in the jQuery data cache. I can do that. But, not unless I use several calls to the animate function, one for each specific, slightly different animation, perhaps using event triggering or setTimeout() calls. Of course I want to avoid this, as it's damn ugly and an odd way around. Much prettier if it could be done internally, within the animation ... Any help would be much appreciated.

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  • Workaround for richfaces combobox hotkey bug

    - by John
    Hi, Does anyone know a workaround for the bug https://jira.jboss.org/jira/browse/RF-8076 ? Just to clarify things, we have a form with multiple inputs, one of them being a combobox with auto complete features. We've setup a hotkey via <rich:hotKey key="return" ... /> It works great everywhere except in the combobox, and I would really like to get it working on the combobox as well. The behaviour I want when the ENTER key is pressed inside the combobox is: If the combobox context was modified by auto complete then do nothing Else action the event on ENTER key pressed We're running on seam/richfaces. I'm open to any workaround, but simplicity is much sought for. Thanks!

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  • grabbing layer contents in a class

    - by Mike
    I have a custom UIImageView class that creates thumbnails (UIImageView) and each thumbnail has a label. The label is created by another class. The label class creates a UIImageView and a UITextView on top of it. This is the init object class' init method: - (id)initWithFrame:(CGRect)frame { if ([super initWithFrame:frame] == nil) { return nil; } CGRect myFrame = CGRectMake(0, 0, 100, 100); myLabel = [[myLabelClass alloc] initWithFrame: myFrame]; //myLabelClass is a UIImageView based class [myLabel setCenter:CGPointMake(50, 50)]; [self addSubview: myLabel]; return self; } So, I have this MAIN VIEW CONTROLLER | |___ UIImageView WITH LABEL | |____ label background (UIView) |____ UITEXTVIEW (text) Now I want to write the contents of all these 3 components to a quartz context. I need to write using drawInRect, because I need to write the full object to a precise location. I expected object.layer.contents to be the image equivalent to these 3 "layers" flattened, in other words, the object's image, the label background and the label text, as it would if I created these 3 objects in Photoshop and flatten the composition. I also expect object.myLabel.layer.contents to contains the rendered contents of the UITextView over the label background. The problem is that when I use UIImage *myImage = [UIImage imageWithCGImage:objecto.myLabel.layer.contents]; [myImage drawInRect:CGRectMake(0, 0, 100, 100)]; I get nothing. How can I obtain a "flattened" image resultant to the full object (including its subviews)? thanks

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  • Prototype: Enable checkboxes list of a specific checkbox is checked

    - by BoDiE2003
    Guys, Ive been using jquery to do this, but now I need to do it with Prototype and Im little confused due lack of documentation I have 2 lists of check boxes First List: Check box 1 Check box 2 Second list: Check box x check box y check box z I need the JS code, using prototype to work like this: Second list, remains disabled unless I check one of the checkboxes of the First List. Any suggestions, or help, please! Thankyou.

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  • jQuery selector not working in IE

    - by CurlyFro
    this method should return a unique array of text from rows with a specific td class. works in ffs and chrome but not in ie8 or safari. can you spot the problem? function getUniqueIds() { var tblLnks = new Array(); $('td.tblLnk').each(function() { tblLnks.push($(this).text().trim()); }); return tblLnks.unique(); }

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  • I have a bunch of images being shown on click via JQuery - any easy way to animate this?

    - by Cenk
    This is the (quite simple) JS code I'm using: $(document).ready(function() { $(".button-list .next").click(function() { project = $(this).parents().filter(".projektweb").eq(0); currentimg = project.find(".images-list li.current"); nextimg = currentimg.next(); firstimg = project.find(".images-list li:first"); currentimg.removeClass("current"); if (nextimg.is("li")) nextimg.addClass("current"); else firstimg.addClass("current"); return false; }); $(".button-list .prev").click(function() { project = $(this).parents().filter(".projektweb").eq(0); currentimg = project.find(".images-list li.current"); previmg = currentimg.prev(); lastimg = project.find(".images-list li:last"); currentimg.removeClass("current"); if (previmg.is("li")) previmg.addClass("current"); else lastimg.addClass("current"); return false; }); }); And this is how the HTML code for the image list looks like: <ul class="images-list"> <li class="current"><img src="img/1.jpg" alt="" /></li> <li><img src="img/1b.jpg" alt="" /></li> </ul> <ul class="button-list"> <li><a class="button prev" href="#">?</a></li> <li><a class="button next" href="#">?</a></li></ul> The CSS: .images-list { height: 460px; list-style-type:none; float:left; width: 460px; overflow:hidden; position:relative; } .images-list img { height: 460px; width: 460px; display:block; } .images-list li { display:none; } .images-list li.current { display:block; } What I'd like to do is animate the images as they come and go - right now they just appear, which is OK but a bit more eye-candy would be nice. Can anyone help me out here? It it even possible to do it this way? Thanks!!

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  • Embedded Windows Media Player background image

    - by Mark
    Hi all, I'm loading an external video stream in my embedded player. Since it takes a little while to connect and preload you see a black background for +- 7 secs untill video plays . I would like to know if its possible to have a background image saying 'Stand by loading video' with my logo on it before the video starts to play. Only thing i could find was bgcolor parameter but that's not what I want. I hope someone can help me thanks!!

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  • jquery - Create a List of all LIs Name's

    - by nobosh
    Given the following block of HTML: <ul id="taglist"> <li><a name="45" href="">Product 1</a></li> <li><a name="1146" href="">Product 2</a></li> <li><a name="13437" href="">Product 3</a></li> <li><a name="51" href="">Product 4</a></li> </ul> Is it possible for JQUERY to return a STRING, one variable with the name values: alert(tagliststring); Would alert: 45,1146,13437,51 Thanks

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  • Remove tabstop from ButtonColumn inside DataGrid

    - by Faruz
    Is there any way to disable keyboard tabStop for a ButtonColumn inside a dataGrid? I want the buttons there to be only enabled through mouse-clicks, because sometimes the grid can be large and I want that pressing "tabs" will skip the grid and move to the other controls on the page.

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