Does anyone know of a method where I could have a CSS rollover image with a percentage width so that it scales with the size of the page?
I presume that I wouldnt be able to use the method shown here http://www.vision.to/css-only-single-image-fast-rollover.php because that sets the image sprite as the background image.
The only other CSS method I have seen was here: http://thefiles.macadamian.com/2008/06/pure-css-image-rollover-without.html
I like this method but was wondering if it were possible to use one image sprite as opposed to having to load the images separately.
Sorry if I sound very vague, whenever I read these questions I always think the people writing them dont describe what they mean properly and now I've come to do it I'm no better myself haha.
Thanks for any help :)
I don't see how you could do this with sprites. They're done by setting a large image as a background for an element, usually a DIV, and then altering the position so that only the desired portion of the image is shown. Different DIVs can show different parts of the image by altering the background image position.
However, you can't scale background images. They're always shown at 1:1. You can make them repeat within the element, or not, but you can't scale them, so the sprite idea is out.
Doing it with separate images is fairly straightforward, as indicated by the link you posted.
Preloading an image for rollover is pretty simple. Just include an image tag with the CSS set to hide the image:
<img src='myrolloverimage.jpg' style='visibility:hidden; display:none;' />
If you don't need to support IE8 and earlier, you could use the CSS3 background-size property with percentage values.
As with foreground images, a sprite file most likely wouldn't be a reasonable option. There are added complexities with sprite files when the image is scaled. The background-position is based on the scaled size of the image, and getting an accurate position using percentage values is problematic.
Related
I have no idea how to fix this. I've included a picture of the site.
This only happens on larger screen monitors, for some reason. On my 14" laptop, its' fine. Anyway, is there any way to ensure that content starts underneath a background image? And not overlap it, as shown.
Thanks so much for any help.
https://i.stack.imgur.com/6PbUr.jpg
Well, it's complicated to work with css relativization when your main image of the site (the takes nearly all the screen) is into background or other rules that don't fill the rest of the elements. The best that you can do is to relativize body.home margin-top with percentages, but I highly recommend that you put that image inside a div container with width 100% and background-size cover and start to work towards that. Any other solution will be hacks and lacks of good practices, because if you want (and one day you will) change de background-image, all your elements will need a new proper location, obliging you to change css every time.
I am using html5 and am trying to create a rough edged seamless border(top, sides + bottom).
I am aware ie8 does not support the CSS3 border image. IE8 is as far back as am willing to cater for.
So am using 3 div's to have the background image display, the only problem is depending on the length of the content, the bottom background image does not align nicely and make the box appear seamless, due to the repeated middle image being cut off prior to the point where the border merges.
I have used a brush in photoshop to create the jagged container. I have had a nose around about this but can not find a solution to fit.
The solution is to set a specific increase of height increment for your content area. This can be done in a couple of ways:
If your content is mostly text, you can set your line-height and/or the height of any other used elements to be the desired increment (or a multiple thereof) and hope for the best.
If this will not work, the only other way would be to use JavaScript.
Here are a couple discussions of this very challenge, including some thoughts on using line height and some starts at workable JavaScript code:
http://doctype.com/any-way-increase-hieght-div-specific-increment
http://www.dynamicdrive.com/forums/showthread.php?t=64034
I've observed that often the websites use only one background image which contains multiple images on it. For example, instead of using separately icons, all of the icons are put on one image and then the different parts of image are used in different section.
Is there any advantage to this?
How can this be used?
For example, for the following Stack Overflow sprite, how would I display just one of the images?
The technique is called CSS Sprites. Basically you use CSS's background-position property and fixed height or width for your element.
If your elemnts are fixed width and fixed height at the same time you can freely create a more compact image. See this site for more complex examples.
You are talking about CSS sprites, in which the background position changes on hover. Learn more here:
http://css-tricks.com/css-sprites/
Change the css property background-position.
yes , using sprites is good for website performs because every single component on website send different http request .So, when we use sprites images the http request become less & website performance increase.That rule is also apply on css also less css files less http request. you can yourself with the help of safari web inspector.
for more better performance download "yslow"
And with CSS sprites is also possible to make e.g. menu button hover effect without waiting until second image loads. see
It has the advantage that only one image needs to be loaded so that things like hover (roll-over) effects are faster. The technique is usually called "CSS sprites". Google for it.
It has been common for a while to put two images on one sprite sheet, but the tendency has been moving towards combining ALL of your background images on the same sprite sheet to load just one file for all of them. There's a rather good tutorial here.
I have an zoomable image in the website. When the image is zoomed out to a large extend it appears very SHARP and ugly.
I tried using image-rendering : opimizequality, optimizespeed CSS but did not work.
Is there any other way out.
Thanks
According to image-rendering on MDC, image-rendering is currently only supported in Firefox 3.6. A similar property, -ms-interpolation-mode, is available for IE7 and IE8. Other browsers don't seem to have this feature (yet).
As latze mentioned, your best bet is to edit the image itself, scaling it to the level you need. I'm not sure, but you may try using <canvas> to perform the interpolation you desire.
I would simply edit the picture instead of the CSS.
Try making the picture slightly larger step by step while you make sure the picture doesn't (as we call it in danish, not sure if it correct english) "pixelate".
This can be done in various image editing programs from The Gimp-shop to Photoshop.
Images aren't meant to be resized that much. Think about an image as a graph where each pixel is a single square in the graph. If you stretch the image out, you're essentially making the pixels stretch out. Some programs try to fill in these pixels with what they think would fit there, others just make the pixel bigger, and others just fill in the surrounding areas with the same pixels to give it a sort of glowish effect. Resizing images down, while it tends to work better, also creates the same effect, because you're just chopping off pixels instead of adding them. Most programs that I've seen will squish pixels together, combining whichever colors were in those pixels. If you have a high detail image, then chopping off pixels is going to make it look horrible. There are no really safe ways to determine which pixels need to be retained to keep the overall image in tact. Most websites that have zoom features have a much larger image which has been resized down and they let you zoom to view the details of the larger image. Some even get separate images of the massive detailed one and the smaller preview one.
I am trying to implement a fixed background for a website like one over here. Searching around for it told me that I can use background: fixed or background-attachment properties for this.
My problem is the image which will be used as background. I am thinking about following issues:
What should be image size?
how will it repeat when browser window size is very large? for big 27" monitors out there?
Can somebody guide me on these points?
Regards
Vikram
That is not a single background image. Its mostly a bgcolor, except for the side clouds. Using a single large image as a background will dramatically slow down your load time.
There's no specific guideline. You need to make the image as large as necessary to satisfy the requirements of the design. If you want someone with a maximized browser window on a 30-inch display to see a single unbroken non-repeating background image, then yes, you'll need quite a large image. It won't perform well.
The Twitter example is a wide but short image, set to repeat along its x-axis. It's wide at 2247 pixels, but perhaps unnecessarily so: it actually appears to be a fixed pattern that repeats horizontally four times within that 2247 pixel image. Nonetheless, you get the idea: make an image that blends gracefully into itself at its edges for seamless tiling, and/or blends into a fixed background color. Position and repeat it as needed, set the background-color of the page, and you're done.