WebCore::PanRecognizer Class Reference

Pan gesture recognizer. More...

#include <PanRecognizer.h>

Inheritance diagram for WebCore::PanRecognizer:

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Collaboration diagram for WebCore::PanRecognizer:

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List of all members.

Public Member Functions
const IntPoint &	panPos () const
	Get the pan position.
int	panOffsetX () const
	Get the horizontal pan offset.
int	panOffsetY () const
	Get the vertical pan offset.
int	panSpeedX () const
	Get the horizontal pan speed.
int	panSpeedY () const
	Get the horizontal pan speed.
virtual void	reset ()
	Reset the gesture.
virtual void	touchEvent (const PlatformTouchEvent &)
	Feed new data.
Private Member Functions
IntPoint	calcPanPos (const Vector< PlatformTouchPoint > &ps)
	Calculates pan position.
Private Attributes
IntPoint	m_panPos
int	m_panOffsetX
int	m_panOffsetY
GestureSpeedCalc	m_speedX
GestureSpeedCalc	m_speedY

Detailed Description

Pan gesture recognizer.

Definition at line 30 of file PanRecognizer.h.

Member Function Documentation

IntPoint WebCore::PanRecognizer::calcPanPos ( const Vector< PlatformTouchPoint > & ps ) [private]

Calculates pan position.

Calculates the pan position using the supplied touch points. If the touch event only contains one touch point, its coordinates are used as the pan position. Otherwise the pan position is in the middle of the first two touch points.

Parameters:

ps

Touch point(s) to calculate from.

Returns:: calculated pan position.

Definition at line 85 of file PanRecognizer.cpp.

References WebCore::GestureRecognizer::m_id1i, and WebCore::GestureRecognizer::m_id2i.

WebCore::PanRecognizer::panOffsetX ( ) const [inline]

Get the horizontal pan offset.

Returns:: horizontal pan offset in pixels.

Definition at line 35 of file PanRecognizer.h.

References m_panOffsetX.

WebCore::PanRecognizer::panOffsetY ( ) const [inline]

Get the vertical pan offset.

Returns:: vertical pan offset in pixels.

Definition at line 36 of file PanRecognizer.h.

References m_panOffsetY.

WebCore::PanRecognizer::panPos ( ) const [inline]

Get the pan position.

Returns:: current pan position.

Definition at line 34 of file PanRecognizer.h.

References m_panPos.

WebCore::PanRecognizer::panSpeedX ( ) const [inline]

Get the horizontal pan speed.

Returns:: horizontal speed in pixels per second

Definition at line 37 of file PanRecognizer.h.

References m_speedX, and WebCore::GestureSpeedCalc::speed().

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WebCore::PanRecognizer::panSpeedY ( ) const [inline]

Get the horizontal pan speed.

Returns:: vertical speed in pixels per second

Definition at line 38 of file PanRecognizer.h.

References m_speedY, and WebCore::GestureSpeedCalc::speed().

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void WebCore::PanRecognizer::reset ( ) [virtual]

Reset the gesture.

Resets the gesture data e.g. when the gesture starts over.

Reimplemented from WebCore::GestureRecognizer.

Definition at line 32 of file PanRecognizer.cpp.

References m_panOffsetX, m_panOffsetY, m_panPos, and WebCore::GestureRecognizer::m_refresh.

void WebCore::PanRecognizer::touchEvent ( const PlatformTouchEvent & ev ) [virtual]

Feed new data.

Processes a new touch event and calculates new data for the pan gesture.

Parameters:

ev

Platform touch event.

Implements WebCore::GestureRecognizer.

Definition at line 46 of file PanRecognizer.cpp.

References calcPanPos(), WebCore::GestureSpeedCalc::firstSample(), WebCore::GestureSpeedCalc::insertSample(), m_panOffsetX, m_panOffsetY, m_panPos, WebCore::GestureRecognizer::m_refresh, m_speedX, m_speedY, WebCore::GestureRecognizer::selectValidPoints(), and WebCore::GestureRecognizer::updateRefreshState().

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Member Data Documentation

int WebCore::PanRecognizer::m_panOffsetX [private]

Definition at line 47 of file PanRecognizer.h.

int WebCore::PanRecognizer::m_panOffsetY [private]

Definition at line 48 of file PanRecognizer.h.

IntPoint WebCore::PanRecognizer::m_panPos [private]

Definition at line 46 of file PanRecognizer.h.

GestureSpeedCalc WebCore::PanRecognizer::m_speedX [private]

Definition at line 49 of file PanRecognizer.h.

GestureSpeedCalc WebCore::PanRecognizer::m_speedY [private]

Definition at line 50 of file PanRecognizer.h.

The documentation for this class was generated from the following files:

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