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  • JavaScript Image zoom with CSS3 Transforms, How to calculate Origin? (with example)

    - by Sunday Ironfoot
    I'm trying to implement an image zoom effect, a bit like how the zoom works with Google Maps, but with a grid of fix position images. I've uploaded an example of what I have so far here: http://www.dominicpettifer.co.uk/Files/MosaicZoom.html (uses CSS3 transforms so only works with Firefox, Opera, Chrome or Safari) Use your mouse wheel to zoom in/out. The HTML source is basically an outer div with an inner-div, and that inner-div contains 16 images arranged using absolute position. It's going to be a Photo Mosaic basically. I've got the zoom bit working using CSS3 transforms: $(this).find('div').css('-moz-transform', 'scale(' + scale + ')'); ...however, I'm relying on the mouse X/Y position on the outer div to zoom in on where the mouse cursor is, similar to how Google Maps functions. The problem is that if you zoom right in on an image, move the cursor to the bottom/left corner and zoom again, instead of zooming to the bottom/left corner of the image, it zooms to the bottom/left of the entire mosaic. This has the effect of appearing to jump about the mosaic as you zoom in closer while moving the mouse around, even slightly. That's basically the problem, I want the zoom to work exactly like Google Maps where it zooms exactly to where your mouse cursor position is, but I can't get my head around the Maths to calculate the transform-origin: X/Y values correctly. Please help, been stuck on this for 3 days now. Here is the full code listing for the mouse wheel event: var scale = 1; $("#mosaicContainer").mousewheel(function(e, delta) { if (delta > 0) { scale += 1; } else { scale -= 1; } scale = scale < 1 ? 1 : (scale > 40 ? 40 : scale); var x = e.pageX - $(this).offset().left; var y = e.pageY - $(this).offset().top; $(this).find('div').css('-moz-transform', 'scale(' + scale + ')') .css('-moz-transform-origin', x + 'px ' + y + 'px'); return false; });

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  • Resuming git-svn clone

    - by CaptainAwesomePants
    I started cloning a SVN repository using git-svn's clone operation. After about 6 hours of importing (it's a bit repo), my computer went and slept on me. Is there a way to resume the operation without redoing all of the initial work?

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  • MySQL InnoDB insertion is very slow

    - by dharmapurikar
    We use MySQL server 5.1.43 64-bit edition. InnoDB is used as engine. We have a sql script which we execute every time we build the application. On ubuntu machine with MySQL server and InnoDB engine it takes about 55 seconds to complete the execution. If I run the same script on OSX, it takes close to 3 minutes! Any ideas why OSX is so slow while executing this script?

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  • Microsoft Dynamics AX - Resources for new developers

    - by Filip Ekberg
    I am trying to find some good resources that will help me understand how to use the .NET Business Connector and without digging too deep into X++ and those other AX-specific things. First of all I want a bit more knowledge regarding the very AX usage basics and after that I want to head on to the AX for .NET developers. So, suggestions on books and resources for this?

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  • Must have tool set for MOSS 2007 development.

    - by Satish
    I'm trying to compile a list of Must have tools/extensions for developing MOSS 2007 to build a dev machine. The dev os is Window 2008 R2 64 bit. MOSS 2007 Visual Studio 2008 Sharepoint Designer WSS/Office Server SDK Visual Studio 2008 Extensions for WSS 3.0 Is there any additional required/nice to have tools?

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  • wx read image from clipboard

    - by Moayyad Yaghi
    hello how can i read image from clipboard ? i was only able to raed text using wx.clipboard. but not images is it possible to read images with wx.clipboard? or there is another way? i use python2.5 and windows vita 64 bit thanks in advance

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  • Quantum Computing and Encryption Breaking

    - by Earlz
    Ok, I read a while back that Quantum Computers can break most types of hashing and encryption in use today in a very short amount of time(I believe it was mere minutes). How is it possible? I've tried reading articles about it but I get lost at the a quantum bit can be 1, 0, or something else. Can someone explain how this relates to cracking such algorithms in plain English without all the fancy maths?

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  • When to use MEF

    - by cmaduro
    I tried Unity and MEF and plain old new. And I am a bit confused as to when exactly you need to use any of these "patterns". Why would I choose to use MEF or Unity if using new is simpler and satisfies my needs. MyObject a = new MyObject(); In other words, what needs justify the use of MEF or Unity?

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  • parse results in MySQL via REGEX

    - by Derek Adair
    Hi, I'm a bit confused on the functionality of the REGEX support for MySQL and I have yet to find a solid example on how to separate a result with REGEX within an sql statement. Example: How could I pull data from a table emails that looks something like... +-------------------------+ |Emails | |-------------------------| |[email protected]| +-------------------------+ and return something through an sql statement that looks like... +------------------------------+ |Username | Domain | TLD | |-----------|------------|-----| |some.email | yourdomain | com | +------------------------------+

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  • Practical Uses of Fractals in Programming

    - by Sami
    Fractals have always been a bit of a mystery for me. What practical uses (beyond rendering to beautiful images) are there for fractals in the various programming problem domains? And please, don't just list areas that use them. I'm interested in specific algorithms and how fractals are used with those algorithms to solve something in practice. Please at least give a short description of the algorithm.

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  • What do you use to keep notes as a developer?

    - by Mike Duncan
    Where as a developer do like to you keep your code snippets, links, checklists, final solutions to problems etc? I've fooled with Google Notebook, MS Onenote, TreePad, textfiles, and Evernote a bit (currently leaning toward Evernote). All have pros and cons but none seem to be really suited to developers. Is anyone super-happy with a collection / note system that's not just generic GTD, but with developer-centric utility?

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  • How to retrieve forbidden characters for filenames, in Java?

    - by Gnoupi
    There are some restricted characters (and even full filenames, in Windows), for file and directory names. This other question covers them already. Is there a way, in Java, to retrieve this list of forbidden characters, which would be depending on the system (a bit like retrieving the line breaker chars)? Or can I only put the list myself, checking for the system?

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  • Using ListViews on the Android?

    - by Robert
    Hey everyone, I am just getting started with the Android SDK and I had a quick question. I am trying to set up a ListView with a rectangle of color on the left and then a bit of text for each row. I also want to make it so I can click each entry in the list and open a new activity to display some information (similar to the contact list). Anyone have any examples to help me out? Thanks a ton, Robert Hill

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  • Matching a value to JSON array values in jquery

    - by chrism
    I have a JSON array that looks like this: ['Monkey','Cheetah','Elephant','Lizard','Spider'] I also have a text input. I want to test whether the value of the input upon 'blur' is also in the array and if it is do something. Knowing a bit of python I tried something like this: var existing_animals = ['Monkey','Cheetah','Elephant','Lizard','Spider'] $('input').blur(function() { user_animal = $(this).val() if (user_animal in existing_animals) { alert('Animal already exists!') } }); So, how rookie is my mistake?

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  • Alternative for Windows Task Scheduler

    - by Richard
    hi, I need a Task Scheduler for Windows. Unfortunately the builtin scheduler doesn't meet my needs, which are: can run tasks every minute/hour runs on Linux and Windows 32 and 64 bit versions GUI interface free Nice to haves: supports CRON files open source status reports of execution times thanks!

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  • Cocoa - simple collada parser

    - by madsonic
    I´ve been researching a bit in the net but didnt find any Straightforward answer, i am looking for a simple way to Load Vertex and U/V data from a collada .dae file, i don´t need textures and normals for my application (for now) but i want it as lightweight&fast as possible. Any hints or existing solutions?

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  • Is "long" still useful in C?

    - by dan04
    It's not the largest integer type anymore now that there's "long long". It's not a fixed-width type: It's 32 bits on some platforms and 64 on others. It's not necessarily the same size as a pointer (for example, on 64-bit Windows) So, does "long" have any meaning anymore? Is there ever a reason to declare a long instead of a ptrdiff_t or int64_t?

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  • IPython doesn't work in Django shell

    - by Zemogle
    I've just recently switched over to using 64-bit Python 2.6.1 on Mac OS X 10.6 (Snow Leopard). IPython won't work with Django anymore, but IPython works from the command-line. The error says: shell = IPython.Shell.IPShell(argv=[]) AttributeError: 'module' object has no attribute 'Shell' I could use the ./manage.py --plain option, but it's not really a fix. Any help very gratefully received!

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