View
766
Download
0
Category
Tags:
Preview:
Citation preview
ethan marcottESXSW2006www.vertua.com
The Question
“”
Trying to move toward absolute positioning versus floats for layout.... I am trying to figure out if [you] have to always use a height
on the wrapper div. If I have text columns that have no specific
height it seems everything breaks at that point.
Shane Perran, graphicalwonder.com
ethan marcottESXSW2006www.vertua.com
Absolute Positioning
❖ It’s all about the x and the y (axes, that is)
❖ Treating parts of your document as distinct “layers”
❖ Use CSS to precisely place them upon a coordinate grid
Cake, yes? Let’s look at an example.
ethan marcottESXSW2006www.vertua.com
A new “positioning context”
div.photo { position: relative;}
p.caption { position: absolute; bottom: 9px;}
<div class="photo"> <p>Here’s a caption. Yay.</p> <img src="photo.jpg" alt="" /></div>
"Bottom-blindness"
position: relative;
position: absolute;width: [x];
position: absolute;width: [y]
margin-left: [x];margin-right: [y];
ethan marcottESXSW2006www.vertua.com
Remember <img align="left">?
ethan marcottESXSW2006www.vertua.com
The basics
img { float: left; }
ethan marcottESXSW2006www.vertua.com
The basics
img { float: right; }
ethan marcottESXSW2006www.vertua.com
Reflow, floats, and you
img { float: left; }
ethan marcottESXSW2006www.vertua.com
Restoring order to the flow
p.clear { clear: left; }
ethan marcottESXSW2006www.vertua.com
Okay, great. Kitty pictures. So?
❖ Floats can provide us with a more flexible layout model
❖ Clearing allows the components of our designs to become “context aware”
❖ Let’s view a simple example.
ethan marcottESXSW2006www.vertua.com
Marrying floats and positioning
ethan marcottESXSW2006www.vertua.com
The marvelous markup
<div class="person"> <div class="image"> <img src="photo.jpg" alt="" /> </div> <dl> <dt><a href="#">Durstan who?</a></dt> <dd> <ul>...</ul> </dd> </dl></div>
ethan marcottESXSW2006www.vertua.com
Getting our 2-column structure
ethan marcottESXSW2006www.vertua.com
Getting our 2-column structure
.person { clear: left;}
.person .image { float: left;}
ethan marcottESXSW2006www.vertua.com
One minor addition
<div class="person"> <div class="image"> <img src="photo.jpg" alt="" /> </div> <dl> <dt><a href="#">Durstan who?</a></dt> <dd> <ul>...</ul> </dd> </dl></div>
ethan marcottESXSW2006www.vertua.com
One minor addition
<div class="person"> <div class="image"> <img src="photo.jpg" alt="" /> </div> <dl> <dt><a href="#"><i></i>Durstan who?</a></dt> <dd> <ul>...</ul> </dd> </dl></div>
ethan marcottESXSW2006www.vertua.com
.person { position: relative;}
Layering the link
position: relative;
ethan marcottESXSW2006www.vertua.com
.person dt i { display: block; height: 160px; width: 160px; position: absolute; left: 0; top: 0;}
.person { position: relative;}
Layering the link
<i></i>
Ethan Marcottevertua.com
Recommended