- From: Lonnie Best <w3@startport.com>
- Date: Mon, 24 Oct 2005 19:23:33 -0700
- To: <www-html@w3.org>
- Message-ID: <000001c5d90b$1a3dc2d0$0a06a8c0@sidekick>
With the "background-position" style property, we can position a *limit of one* background-image so that it "docks" against any "side or corner" of a block element. I propose the ability to "add and position" *multiple* background images for a "single element". With this specification, a designer would be able to "round the corners" of any element without having to make style rules for any other element! For example, if I have 4 images: top-left-curve.jpg top-right-curve.jpg bottom-right-curve.jpg bottom-left-curve.jpg and I have one element: <p class="RoundOffCorners">Wouldn't it be nice and elegant if you could make a "CSS style rule class" that would round the corners off of any markup element that was a member of that class?</p> We'd be able to create one CSS style rule to make the element have rounded corners: .RoundOffCorners { background-image-top-left: url("top-left-curve.jpg") 4; background-image-top-right: url("top-right-curve.jpg") 2; background-image-bottom-left: url("bottom-left-curve.jpg") 3; background-image-bottom-right: url("bottom-right-curve.jpg") 1; } The numbers at the end represent "Background-image z-index values". This is needed to determine which backgrounds will be on top if the element's size is so small that the "docked multiple background images" overlap. So essentially, I'm proposing that we add following properties to the CSS specification: background-image-top background-image-left background-image-right background-image-bottom background-image-top-left background-image-top-right background-image-top-left background-image-top-right background-image-bottom-left background-image-bottom-right background-image-center If you don't like the idea of adding "this many property names", perhaps we can figure out a way to add just one property that's property value can contains an collection of images and their respective "docking/z-index" settings: .RoundOffCorners { background-images: url("top-left-curve.jpg") 4 top-left, url("top-right-curve.jpg") 2 top-right, url("bottom-left-curve.jpg") 3 bottom-left, url("bottom-right-curve.jpg") 1 bottom-right; } So what do you think? Isn't having only one background image an oversimplification? When the structure of something is oversimplified at its base, it leads to complication in higher layers. That's why there are so many tacky ways people round corners (i.e. adding empty block elements to markUp and styling them OR using outside elements to round corner of the current element OR Layering ). Respectfully, Lonnie Lee Best
Received on Tuesday, 25 October 2005 02:24:31 UTC