Touch and text selection problem

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project：Qt 5.3 Qt Quick Controls - Touch Gallery
target：htc g14

1. When I click the list's items quickly for many times, then some items will not be deselection, and I can't select other items at all. I guess there is some missing click.

2.Similarly, when I click the swicth button quickly, then it will be Insensitive.

3. Why am I could not select text in TextInput control? The selection functionality of text controls must be
   Implement by myself?

any infomation can help me.