I am 99.99% certain the internet tablets use resistive touch screens, which means this underlying technology cannot do multitouch.
Using more than one contact point on these screens will change a reading, but it won't get the result you want. It will be an intermediate reading between the multiple contact points. Here is a manual from atmel which seems to do a decent job of explaining how a resistive touch screen works: http://www.atmel.com/dyn/resources/prod_documents/doc8091.pdf My assumption also is that this is a 4 wire touch screen, not a 5 wire touch screen, since we can get pressure readings and 5 wire touch screens don't do pressure readings. For comparison, this is a relatively friendly guide on how one kind of capacitive touch screen works: http://electronics.howstuffworks.com/iphone2.htm It may not be the only kind of capacitive touch screen. You might reasonably ask why Nokia chose to use a cheaper and less capable technology (digikey.com lists relative pricing and this is how I know it is cheaper.) My suspicion, other than cost, is that they already knew how to use resistive touch screens and didn't see a reason for adding additional technical or perhaps legal risk. Or maybe since it's so cold in Finland nobody takes off their gloves and everybody uses a stylus instead, which you aren't supposed to be able to do with a capacitive touchscreen (see above link.) Darius Jack wrote: > Hi, > > you said: > " >> There is no native multi touch on these devices. > " > Who said otherwise ? > > You can call my experience with maemo multitouch side-effect. > Ok. > But it works for me. > I use both iPod Touch and maemo. > It works how it works but works (side-effect or alike) ;) > > you asked > " > have you ever actually done any coding for maemo > " > > Tried hard to loggin into maemo, 3 times failed and gave up. > Logging procedure problems. > __________________________________________________________________ > There is no such facility like Think-Tank at Nokia, so no chance > to develop and discuss multitouch for Nokia/maemo. > Moreover, one or more guys from this dev list claimed that discussing > multitouch for Nokia maemo was spam. > > Wish you success anyway. > > Darius > _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
