[Qt-interest] QPanGesture why two points ?

[Wathek LOUED]

Hi everybody,

I need some information about the QPanGesture I've been looking at the code
but I don't understand why in the TouchUpdate and TouchEnd it checks two
touch points ev->touchPoints().at(0); and ev->touchPoints().at(1);

Here's the code :
http://qt.gitorious.org/qt/qt/blobs/4.7/src/gui/kernel/qstandardgestures.cpp#line82

Thank you so much

Sincerely
Wathek
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