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20.5.13 ¥¤¥Ù¥ó¥È¤Î»²¾È

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(window buffer-position (x . y) timestamp)
Function: event-start event

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Function: event-end event

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Function: posn-window position

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Function: posn-point position

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Function: posn-x-y position

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Function: posn-col-row position

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Function: posn-timestamp position

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Function: scroll-bar-event-ratio event

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Function: scroll-bar-scale ratio total

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(+ (point-min)
   (scroll-bar-scale
      (posn-x-y (event-start event))
      (- (point-max) (point-min))))

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