#include <InputHandler.h>

Inheritance diagram for osmscout::TapRecognizer:

Signals
void	doubleTap (const QPoint p)

void	longTap (const QPoint p)

void	tap (const QPoint p)

void	tapAndDrag (const QPoint p)

void	tapLongTap (const QPoint p)

Public Member Functions
void	setPhysicalDpi (double physicalDpi)

	TapRecognizer ()

void	touch (const QTouchEvent &event)

	~TapRecognizer () override=default

Detailed Description

Simple class for recognizing some basic gestures: tap, double tap, long-tap and tap-and-hold.

Widget should send own QTouchEvent to this object, when some tap gesture is recognized it emits one of its signals.

Tap: touch shorter than holdInterval (1000 ms) followed with pause longer than tapInterval (200 ms)
Long tap: touch longer than holdInterval (1000 ms)
Double tap: tap followed by second one within tapInterval (200 ms)
Tap, drag: tap followed by drag
Tap, long tap: tap followed by long tap within tapInterval (200 ms)

Physical DPI of display should be setup before first use. TapRecognizer use some small move tolerance (~ 2.5 mm), it means that events are emitted even that touch point is moving within this tolerance. For double tap, when second tap is farther than this tolerance, double-tap event is not emitted.