HTML and CSS Reference
In-Depth Information
Fine Scrolling Full Code Example
Example 9-3
shows the full code listing for the Fine Scrolling example. Notice that this code
adds in the
colBuffer
and
rowBuffer
variables as well as the matrix transformation secret
that performs the actual smooth fine scrolling.
Example 9-3. Fine scrolling
<!doctype html>
<html
<html lang=
"en"
>
<head>
<head>
<meta
<meta charset=
"UTF-8"
>
<title>
<title>
CH9 EX4 Scrolling Test 2 fine scrolling
</title>
</title>
<
script src
=
"modernizr.js"
><
/script>
<
script type
=
"text/javascript"
>
window
.
addEventListener
(
'load'
,
eventWindowLoaded
,
false
false
);
function
function
eventWindowLoaded
() {
canvasApp
();
}
<
/script>
<
script language
=
"Javascript"
>
function
function
canvasSupport
() {
return
return
Modernizr
.
canvas
;
}
function
function
canvasApp
(){
iif
(
!
canvasSupport
()) {
return
return
;
}
else
else
{
var
var
theCanvas
=
document
.
getElementById
(
'canvas'
);
var
var
context
=
theCanvas
.
getContext
(
'2d'
);
}
document
.
onkeydown
=
function
function
(
e
){
e
=
e
?
e
:
window
.
event
;
keyPressList
[
e
.
keyCode
]
=
true
true
;
