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HTML - Sizing An Element Based On Its Container's Size, Using Pixels
Hi, I just got back into HTML and CSS and stuff for a new project after a lengthy absence. I'm also trying out PHP for the first time and having a lot of fun with it, but I'm having problems as usual. This doesn't have to do with PHP per se, but if PHP is involved in the solution that'd be just fine. By contrast, I'd like to avoid Javascript, since a lot of people have it disabled by default.
One of the things that's always irked me about CSS is how it seems to be completely impossible to define an element's width/height based on its container's width/height without using percentages or without weird things happening when you use padding. Say I want to do one of the simplest things imagineable -- define a rectangular area within the page, with 25 pixels both to the left and right of it, and 12 pixels above and below it, no matter what the browser window's size is. While it's no task to set the rectangle's position relative to the body of the page (using left and top, or whatever), deciding its width or, particularly, height seems to be impossible. 100% - 25px is, sadly, not allowed, even if I incorporate PHP, since PHP has no way of telling what the 100% actually represents. I've been puzzling over this for the last couple hours, and after a great deal of fiddling with alignments, margins, padding, and such, these two pieces of really simple HTML are the best I could do, and they're both flawed: Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<style type="text/css">
<!--
body
{
margin: 0px;
padding: 12px 25px 12px 25px;
background-color: darkblue;
}
#inner_box
{
position: relative;
width: 100%;
height: 100%;
background-color: lightblue;
}
-->
</style>
</head>
<body>
<div id="inner_box">
Text
</div>
</body>
</html>
Paste that into a HTML file to see what I'm talking about graphically. The problem here is clearly that, for whatever reason, the 100% height in inner_box doesn't activate and inner_box ends up only as high as a single line of text allows. I don't know why. But in this next example... Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<style type="text/css">
<!--
body
{
margin: 0px;
padding: 0px;
background-color: darkblue;
}
#outer_box
{
position: absolute;
margin: 0px;
padding: 12px 25px 12px 25px;
width: 100%;
height: 100%;
background-color: lightblue;
}
#inner_box
{
position: relative;
width: 100%;
height: 100%;
background-color: white;
}
-->
</style>
</head>
<body>
<div id="outer_box">
<div id="inner_box">
Text
</div>
</div>
</body>
</html>
Here I've fixed the problems with the first snippet by adding a new container (outer_box) with absolute positioning that covers the entire body area. inner_box goes inside it and tries to act like it did in the first example. Unfortunately, for some reason, outer_box doesn't act like the body tag did in the first example -- when padding is added to it in order to position the elements within it, outer_box expands itself instead of just resizing inner_box, like the body tag did. I've done a lot of experimenting and I simply can't find the solution. All I want is a page with a few pixels of blank space to all sides of a floating rectangle. I uploaded a couple of doctored image samples of what the page should look like, but doesn't: here and here. Anyway, in summation, this is driving me nuts. I know I could probably use Javascript to get the container (body or outer_box)'s width, and go from there, but like I said, I'd rather avoid Javascript. There has to be a better way to do this. Any help would be very welcome. EDIT: After some more experimenting, I've discovered something interesting. If I declare example 1's doctype to be: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> then it works properly. The same cannot be said for example 2. And I really can't tell why. I guess HTML forgives something that XHTML doesn't. Also, example 1 doesn't work if I include the HTML doctype's URL: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> Strange. Anyway though, it's important to make example 2 work since I would usually be working with containers within containers, not just within the body tag. So I still haven't solved my problem. Similar TutorialsIs there a way to ensure that text size renders well even if screen resolution is extreme? Thanks... So I know if you use "%" to define your height and width with tables that it allows you the table to resize based upon a users browser size. My question is how can you do this with images? I tried setting my height and width for my image using "%" but then my image just becomes overly stretched. My professor said that I should create a table and than place the image within the table, and then set the table height and width using "%". The code below is what I tried. It didn't work though. Any ideas on how to do this? Code: <body>
<table width="100%" height="100%" border="0">
<tr>
<td height="100%" width="100%"><p align="center"><img src="images/Banner.png" align="center" class="source-image" /></p></td>
</tr>
</table>
</body>
Thank you for your help! I have a website with two side boarders inside a table and a content cell in the middle The left and right boarders are 100px each, and the middle I want to be the rest of the page. I tried to define the tables widths as 100 each and then add the middle to be 100% (to make it the remaining space) but it just filled the whole page with the content cell. Could anyone help me out? Thanks, Chuckles Here is the code I'm adding to my website to feature a Google Ad text link. <script type="text/javascript"> <!-- google_ad_client = "ca-pub-548569347568435"; /* google ad link1 */ google_ad_slot = "6594051295"; google_ad_width = 160; google_ad_height = 90; //--> </script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> Everything is aligned to the left and the google ad appears tight against the left hand side of my column and I need to move it 5 pixels to the right to appear inline with everything else, I have tried putting left:5px; in various different places in the html code, but it either does nothing to the position or the google ad disapears altogether. So where do I put the positioning code? and is left:5px; the correct code for the job? Thank-you James How wide should you make your page/site? Since most have different size monitors and settings, how wide should your page be so it's not tiny on one user's monitor, and not too big on another? Is there a way (HTML, CSS or Java) to make an index page open automatically 150 pixels down from the actual top of page? Reason: I have a lot of cheap hosted sites with banners at top and it would be great if I could get the page to automatically open with the top banner scrolled off the top of the screen. OK, I'm cheap...... I admit it but I was thinking that it would be nice if this could work..... i have 2 frames in my parent frame say 1.htm ie left frame and 2.htm ie right frame now this 1.htm is quite a long frame and has a scrollbar and 2.htm is a short one i dont the scroll bar beside my frame 1 but want it to be for my entire parent window ie i wont to scroll both my left and right frames together how do i do that Hello, okay, so i was thinking about redesigning my site because i never really have done so before. but as i was thinking, i was thinking it would be nice to be able to fit more stuff across the screen width wise.... right now my website has like 750px width... and i was wondering if i increased it some, would the majority of the people not have a problem viewing it? and if so, how many pixels wide do u think i could go before its too wide... i have my screen resolution said at 1280x1024... does anybody know what the majority of people set their screen resolutions to? any help would be great..thanks.. Im having problems getting my table to the right size. I want it to be 100% of the page but it only becomes 100% of whats inside the table. Any ideas what to do to solve this? Thanks Jake At the mo, the code is Code: <table summary="News" width="100%"> Hi, I'm using an image for my web background, but I have a little problem. I have to go and size the image correctly in the image editing program for it to look right, but then if you resize the webpage it doesn't look right. Is there a way to make the image automatically resize itself depending on the size of the person's screen? How can I make my forms smaller. I already know how to control length, but how can I make the height lower. Hi, I have been having issues with a scroll bar on my page, and have tried a few different html codes, and have messed with sizing but am not getting the result I want. Here is the page I am referring to: http://userwww.sfsu.edu/~davidson/ar...tractbody.html I would like for there to be only the horizontal bar, like I have. But I would like the box to be smaller (i've tried making the grid's width smaller, but then the scrollbar doesn't have the pictures side-by-side, but pushes one to the bottom and it creates a vertical scroll bar). I would like it to be so that one picture or one and a half pictures, it doesn't matter, is shown. i want less to be automatically visible. i want it so you just scroll to view the rest, all side by side. Hopefully that makes sense? Thank you!!! Ok I was just informed that on our companies site that there is a new window that pops up when a link is clicked. This is supposed to happen but the one thing I am trying to figure out is that the new window is rather small and the customer has to always enlarge it. They are using IE. I have tested it with IE7 with the same results as reported but it has also been tested with FF and SeaMonkey and the new window is large. Is this an IE thing, perhaps a setting or do I actually have to add something to my CSS/HTML to account for this? Thank you for the help. Hi! I have a page that contains a text area. What I want it to do is to change its size according to the size of the browser window. How can I make it do that? I did it once but just can't seem to remember how I did it. Thanks Hi, I have made a site recently, its fairly dodgy looking but thats what they wanted, it all worked out well except for one of the pages the 'footer' section of the main table wont resize properly, all the pages are coded exactly the same for the section, but just one page wont work the site is www.thesavergroup.com and the page that wont behave is the eftpos page. Any help would be appreciated i'm going nuts over this. Thanks Chris I've got an applet with some features, one of which a background image. It's actual size is 10.60 inches wide by 5.30 inches of height. Using WIDTH="744" and HEIGHT="600" (as shown on the code below) does not display the entire image. Can someone tell me the right setting of values to fix it? Is there a code to authomatically capture whatever the size of the .jpg and make it fit? Thanks in advance. Here's the html: <p align="center" <APPLET code=string WIDTH="744" HEIGHT="600"> <param name="para_back" value="background.jpg"> </APPLET> </p> How can I make the browser window that my site is in automatically have specific height/width dimensions? Making toolbar and scrollbar go away would also be nice. How do I make this simple HTML/CSS page look the way I want? If you render this code in a browser, you will see what I'm trying to do. Thanks! Code: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0//EN"> <html> <head> <title>Vertical Sizing Test Page</title> </head> <body style="margin: 0; background-color: #FFF; font-family: Verdana; font-size: 10pt;"> <div style="background-color: #FED; padding: 10px; height: 25px;"> Top Banner. I want this to be sized in pixels to accommodate raster backgrounds. </div> <div style="background-color: #DEF; padding: 10px; margin: 10px; border: 1px dotted black;"> <h2>Main Content Area</h2> I want this to vertically fill the remainder of the page.<br/> <br/> There should not be any unused space below the bottom banner.<br/> <br/> If there is a lot of dynamic content in this section, the user will need to scroll. However, if there isn't a lot of content, the user shouldn't have to scroll.<br/> <br/> This should also be vertically centered. </div> <div style="background-color: #FED; padding: 10px; height: 25px;"> Bottom Banner. I want this to be sized in pixels to accommodate raster backgrounds. </div> </body> </html> Is there an HTML script that will automatically proportionately size a graphic? Say you set the Height=100 then the Width=?? would be automatically adjusted depending on the actual size of the parent graphic. |
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