January 2008
Intermediate to advanced
581 pages
110h 10m
English
Content preview from ADOBE® FLEX® 3: PROGRAMMING ACTIONSCRIPT™ 3.0
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ADOBE FLEX 3
Developer Guide
386
Scrolling bitmaps
Imagine you have created a street mapping application where each time the user moves the map you are required to
update the view (even if the map has been moved by just a few pixels).
One way to create this functionality would be to re-render a new image containing the updated map view each time
the user moves the map. Alternatively, you could create a large single image and the
scroll() method.
The
scroll() method copies an on-screen bitmap and then pastes it to a new offset location—specified by (x, y)
parameters. If a portion of the bitmap happens to reside off-stage, this gives the effect that ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.