Why "Pinch-to-zoom with touchpad" generates Ctrl keypress ?

[Joni Hariyanto]

First off, I need pinch-to-zoom feature.But whenever I pinch, why does keypress event Ctrl also generated ?This happens when the mouse cursor is on most window parts, such as title bar, taskbar, and even the entire window of certain apps, say Word, but not Excel.Sometimes the fired Ctrl event got stuck, so when I press other key it acts as modifier key.Can't pinch-to-zoom generates only mouse wheel event without the Ctrl key event ?Thank you.

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