Class QfKineticHandler

ClassList > QfKineticHandler

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Inherits the following classes: QtQuick::Item

Inherited by the following classes: KineticHandler

Public Properties

Type	Name
property Item	mapCanvas
property Item	mapCanvasWrapper
property real	panAccumX
property real	panAccumY
property bool	panRunning
property var	panSamples
property real	panVx
property real	panVy
property point	zoomCenter
property bool	zoomRunning
property var	zoomSamples
property real	zoomVelocity

Public Functions

Type	Name
void	activate ()
void	addPanSample (x, y)
void	addZoomSample (scale)
void	resetPanSamples ()
void	resetZoomSamples ()
void	startPanInertia ()
void	startZoomInertia (center)
void	stopAll ()

Detailed Description

Provides kinetic (inertia) scrolling for map pan and pinch-zoom gestures.

Qt's pointer handlers only report instantaneous position, not velocity. We sample finger positions over a short time window to compute release velocity. After the gesture ends motion continues with exponential friction decay (~60fps timer).

Public Properties Documentation

property mapCanvas

Item QfKineticHandler::mapCanvas;

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property mapCanvasWrapper

Item QfKineticHandler::mapCanvasWrapper;

---

property panAccumX

real QfKineticHandler::panAccumX;

---

property panAccumY

real QfKineticHandler::panAccumY;

---

property panRunning

bool QfKineticHandler::panRunning;

---

property panSamples

var QfKineticHandler::panSamples;

---

property panVx

real QfKineticHandler::panVx;

---

property panVy

real QfKineticHandler::panVy;

---

property zoomCenter

point QfKineticHandler::zoomCenter;

---

property zoomRunning

bool QfKineticHandler::zoomRunning;

---

property zoomSamples

var QfKineticHandler::zoomSamples;

---

property zoomVelocity

real QfKineticHandler::zoomVelocity;

---

Public Functions Documentation

function activate

void QfKineticHandler::activate () 

---

function addPanSample

void QfKineticHandler::addPanSample (
    x,
    y
) 

---

function addZoomSample

void QfKineticHandler::addZoomSample (
    scale
) 

---

function resetPanSamples

void QfKineticHandler::resetPanSamples () 

---

function resetZoomSamples

void QfKineticHandler::resetZoomSamples () 

---

function startPanInertia

void QfKineticHandler::startPanInertia () 

---

function startZoomInertia

void QfKineticHandler::startZoomInertia (
    center
) 

---

function stopAll

void QfKineticHandler::stopAll () 

---

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The documentation for this class was generated from the following file src/core/qml/QfKineticHandler.qml