HI,
you’ll likely need to contact the Protaculous guys for help with that.
Scrolling is different on an iPad to on a desktop machine., and things are handled differently as a result. On an iOS device, you aren’t scrolling a document around, rather moving the viewport instead. It’s a conceptual hoop to jump through.
So, yes, scrolling things that work well on your Desktop machine may not work as well on an iOS device because of the way it handles window content. My concern is that in the long term, as iOS and OSX converge (as they seem to be with Lion and more so with Mountain Lion), you may find this model appearing on desktop machines. So it’s worth trying to get your brains around it now.
It took me a while to think through this as well.
You can read my notes on the subject (in relation to my Spawn New Window Actions) here: iPad Friendly
An extract:
iOS is different. As you are aware, iOS is touch focussed, and is designed for use on very small screens (iPhone, for example). As a result, the way a web page is displayed is very different. Firstly, there is no window in the way that you would expect to find on a desktop machine (even on an iPad with its larger screen). Instead of scrolling around a page, causing content to move in a window, in iOS you are moving a “viewport” around. The page stays static, but the view is moves as you use your fingers to move the page around. The illusion is one of scrolling, but it isn’t scrolling in the way that you would be used to.
To make this easy to understand, imagine you have a book or a magazine page. You will also need a small cardboard frame to look at the page through. The centre hole of the frame is analogous to the viewport in the iPad or iPhone. To move the page around, you need to move the frame, not the page. The frame also lets you magnify or shrink the page by moving it closer or further away. This is what happens as you flick and pinch your way around a web page on an iOS device.
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