Creating Image Thumbnails That Maintain Aspect Ratio
Jan 18, 2010
I've been working at this one for a few days now, and I keep getting the same puzzling results on what should probably have been a simple issue.
My page has images I've loaded at the top and set to {display: none}. The eventual goal is to create thumbnails that will maintain the original images' proportions, but fit within 150x150 px (this is for an artist's gallery page, so it's pretty important to keep the thumbnails looking like the originals). Obviously, the first thing I need to do is get the images' heights and widths. I've tried to do this by iterating through the document.images array and just getting the widths and heights, but for some reason I always get 0 x 0 for the first image. I've tried fixing this by inserting another image before it and then starting the loop at 1 instead of 0 (so it excludes that first image), but I still get the same value. I even tried setting the script to "defer" so it wouldn't run until the page had loaded. Same results. It also doesn't seem to matter whether I ask for document.images[x].width or document.images[x].naturalWidth. The same thing happens either way. Does anyone know what's going on? There's got to be something I'm missing.
This slideshow works fine except that it keeps the aspect ratio of the original pic image. If original image is a portrate all photos are portrate size, even landscapes. If original is landscape, the same is true. The script works correctly when viewing in MS FrontPage. After FTP uploading problem appears. Code:
I am building a site in Dreamweaver for a client which uses templates for a photogallery that uses simple Javascript to load images "OnClick" into a named <img> tag. The <img> tag has no dimensions preset because the loaded images vary in size and aspect ratio (the images are all prepared so that they will fit easily within the rest of the page layout, using their actual dimensions).
This all works just fine on Firefox (Apple), but on Safari and Mac IE there is a problem. When image-2 replaces image-1 (using MM_swapimage), if image-2 has the same height but a narrower width than image-1, then image-2 appears with image-1's width. Both image-2 and image-1 have the same height, so the display of image-2 now has the wrong aspect ratio (everthing looks "fatter").
I haven't checked Windows browsers yet. I searched around and haven't seen a similar issue. Anyone know about this, and a good workaround?
so im almost finished my first site! very excited. its for my dads business, hes a screening contractor.actually i doubt he will get any business out of it, even once we get our real domain name and everything because i don't even know how to get Google to like it. its OK though, its mainly just a practice site for me anyways before i make a resume site for myself. anyways, this mayt sound like a flash question but i asked on flash sites and they have no idea, and i think it has more to do with how i embedded the flash. yoy see, it consists of 3 divs, an html content area, and a flash banner and a flash menu, which stretch depending on the window size to keep their aspect ratio. its that streachyness that i believe is causing the problem. everything works exactly as planned in Firefox, chrome, and pure flash player. but in IE, safari and opera, the size and position of things are way messed up! (only really care about IE). the edges of dynamic text are slightly to the left or right and hanging behind things because of it, same with some movie clips and when i didn't want things to appear on the stage i set their x position to be the length of the stage,
i think that ie is calculating the size onresize incorrectly. heres the site, take a look at the the script file:[URL]..
Has anyone got any suggestions for keeping aspect ratio when scaling an image. I want to use it on my 'advert full details' on my website. This page displays an image the user has uploaded to my database, but sometimes I get really hugh images uploaded! When I scale them using % in Dreamweaver I lose the aspect ratio!
displaying images properly maintaining its aspect ratio?
My requirement: ===========
I have a table with single cell (means single row and column). I have to display image inside this cell. But when I do so using the below mentioned statement, the image expands and cover the entire cell area.
Is there a way to create a div or some container in which there will be an image such that the image fills the container but retains its aspect ratio? So if the container is 100px x 100px and an image is 200px x 100px it will be resized to 100px x 50px. Conversely, if the image is 100px x 200px then it resizes to 50px x 100px. An image of 400px x 50px becomes 100px x 12.5px and so forth.
The issue is I have to dynamically build the container pulling images from an image folder. The images can come in all sizes. But I want to make sure they all fit in the same square 'box' without distorting the image.
There is text and a button below the image and I want them to stay in the same 'spot' on the screen without being moved around because the height or width of the image above it grows/shrinks to accommodate a change in either the height or width. These can change but not outside a controlled 'box'.
Maybe there's a way to get the actual size (through Javascript or something) then calculate a percentage to resize the image to?
where da boss wants our a large piece of our site to be fully dynamic and integrated on any screen size. This means changing font on size. Well I cam up with a solution, figured if no one has one better, then i'll share
I am creating a grid of thumbnails. When a user hovers over a thumbnail, the image enlarges. The *trick* is, I want the "active area" to only be the size of the thumbnail. That is, the thumbnails are 180x120, and when the mouse leaves that area, I want the large image to shrink back to normal size.
I have a working demo here:[url]
The way I accomplished this feels hacky though, and I's like to know if there's a simpler/more elegant way to accomplish it. The thumbs are an unordered list of images.
Here is my javascript:
In essence, I add an overlay div over each thumbnail which acts as the trigger to shrink the enlarged image. I thought I could use the parent <li>, as it doesn't appear to expand with the image (since I've set its size in my CSS) but that didn't work.
I'm trying to size an image to fit the browser window. It will be the only thing in the frame, so it doesn't matter if it's the background or not. I've found quite a few ways to have the image automatically resize itself where it either gets cropped off or changes ratio to stretch, but I've not found anything where it'll keep the full image and ratio and just have bars top and bottom or sides.
I'm looking for a very simple image gallery solution (no lightbox or something other fance) with a large image and a x amount of thumbnails at one off the sides, where the big image change whenever another thumbnail is clicked, without page refresh. ( a fade transition would be nice)!Which Plugin, preferably as light as possible, is the most suitable for this task?
I'm trying to create a group of radio buttons that enable user to select whether to maintain the current image, remove the image or upload a new image. If user selects maintain the current image or remove the image, the upload field will be disabled, when user select upload a new image, the upload field will be enable. My script is as below but I do not get it work correctly, do you have any advice for me?
HTML Code: <script type="text/javascript"> function Disab() { frm=document.forms[0] if(frm.change_voucher.checked) {frm.img_voucher.disabled=false} [Code]....
I have the basic image gallery set up for thumbnails to populate a larger image... i uploaded it quick, take a look: [url]
Only thing i need to do is make the next and back buttons work...i know its something simple im missing if you bring up the firebug console i have several console logs on the next button.
I've set up jcarousel and configured it to work how I need it to, apart from one thing; I need the images to keep their width - height ratio when the browser is resized.
I'm using the Flexible carousel configuration and the width of the images changes appropriately when the window is resized, but the height stays the same, I need it to change.
I was viisitingand saw the images fade on the home page. It uses jquery and I was needing some assistance getting this working on my web site. Where would I locate any "how to" documentation?
First off, I am no professional coder, so bare with me. The goal was to implement a photo gallery using "ImgBrowz0r" (javascript), and a jQuery plugin called prettyphoto, to make the selected photo pop-up in front of the website. I am very impressed by the way it looks thusfar.
URL: Gallery One thing bugs me however, which I can not wrap my head around;
When viewing the above gallery in Windows 7, using IE8, the thumbnails display really weird rollover behavior. The thumbs are not clickable, except for on the 1-px border and sometimes the exact centerlines. I found out that it is an issue everywhere, except on the last row of folder thumbnails. The last row works perfectly fine! Can anyone explain this to me? I am lost!
I have a php script that gets all images in my directory and outputs them as gallery[0]=firstimage.jpg, [1], [2], .. The php script is supposed to work with the javascript, so to cover all angles here is the php
<? //PHP SCRIPT: getimages.php Header("content-type: application/x-javascript"); //This function gets the file names of all images in the current directory //and ouputs them as a JavaScript array
There are many script on the e web that can easily do what I am looking for but they don't teach me anything. I am trying to learn this stuff, and the best way will be to know what each variable is doing, what function is being called when the thumbnail is hover or focus. All I need is to start with a single image, when I hover on the image, a larger image appear.I know how to declare a variable, create a function, how to put these things into everyday projects is what the books never tells you.
i installed jondesigns smooth gallery from [URL] All installed fine, minus one problem with setting the thumbnails up. It asks for this to be entered im just not sure where that code should go: useThumbGenerator: true also it asks for a cache folder to be writeable does that just go anywhere or? Heres my version here: [URL]
Looking for javascript, to do what i've hap-hazardly slapped together here: I'd like to do this without having to reload a page or create a new page for each image.
[URL]
Specifically the switching of the main image by the thumbnails. The difference in what i've seen online, is that i'm actually using them as a cell background.
I came across this awesome image slider: Thumbnails Navigation Gallery with jQuery. The problem is ..you have to click on "best shots" to see the thumbnail navigation... 1) How do you show this thumbnail navigation straight away on loading the page? (ie "best shots" and other list items dont need to be there) 2) and get the thumbnails show near the bottom of the page? 3) and also get the next image to fade in automatically say after 5 seconds, without having to click on a thumbnail, although one can?
Right, here goes: I'm using a modified "jQuery Cycle Plugin - 'goto' Demo 2 (aka: Poor Man's pager)" implementation of the Cycle plugin, this works fine in FF2+, Op9, Saf3+ and Chrome2 but in IE cycle stops the background- image from repeating! As usual I cannot give out a public link due to NDA but I can give you these two image locations to see the differences: [URL]
I am creating a custom gallery that I require an image and text to swap on click of an anchored thumbnail. I have successfully managed to change the image on click however I can't seem to manage changing the text. Currently when a user clicks on the thumbnail both the image and text is swapped however when the user clicks on another anchored thumbnail (after clicking on the first) the image swaps correctly but the text does not change My Code
I've implemented a photo gallery using Galleria and jCarousel on my site, and have chosen to use custom thumbnails instead of having Galleria generate them for me from the source images.
As far as I can tell, there may be an advantage in conserving bandwidth with this method, but the page also degrades to a nice set of thumbnails that link to the larger images (which is very nice, IMO).
Everything works beautifully, however when viewing this gallery for the first time, instead of the large image fading in nicely as it does in the Galleria demo, it almost kind of "slides" the image into view like it's rendering pieces of it as it loads in the container. This is definitely an effect i would like to avoid, but I also thought that one of the benefits of Galleria was that it pre-loaded images in the background, right?
So why does my gallery appear to be loading these images "on-demand"?
I am looking for a version of lightbox that would allow the user to click on a single reference image and when the "lightboxed" version appears a strip of thumbnails would be available at the top or bottom of that image. Thus, the user could navigate between images within the lightbox by clicking on a different thumbnail. If such beast exists a URL would appreciated. Extensive Googling hasn't turned up what I'm looking for at all.
I would like to animate a number of thumbnails in a gallery. My idea is to have each thumb transit to another thumb, i.e. you put your mouse over a thumbnail, and it slowly fades to a different image. I have spent a lot of time trying to get this to work, using exhaustive combinations of fadeToggle() and stop(false, false) etc etc and I still can't get a smooth effect.
I have created my own fade engine using a variable that drives the opacity of the image that fades in/out over the other image. My issue is that I would like to get this into a function, as it works beautifully for one image, or if you simply duplicate the code for other thumbnails. The problem is there could be up to 32 thumbnails on the page, which means a lot of repeated code.
