Class KineticHandler

ClassList > KineticHandler

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Inherits the following classes: QtQuick::Item

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 KineticHandler::mapCanvas;

---

property mapCanvasWrapper

Item KineticHandler::mapCanvasWrapper;

---

property panAccumX

real KineticHandler::panAccumX;

---

property panAccumY

real KineticHandler::panAccumY;

---

property panRunning

bool KineticHandler::panRunning;

---

property panSamples

var KineticHandler::panSamples;

---

property panVx

real KineticHandler::panVx;

---

property panVy

real KineticHandler::panVy;

---

property zoomCenter

point KineticHandler::zoomCenter;

---

property zoomRunning

bool KineticHandler::zoomRunning;

---

property zoomSamples

var KineticHandler::zoomSamples;

---

property zoomVelocity

real KineticHandler::zoomVelocity;

---

Public Functions Documentation

function activate

void KineticHandler::activate () 

---

function addPanSample

void KineticHandler::addPanSample (
    x,
    y
) 

---

function addZoomSample

void KineticHandler::addZoomSample (
    scale
) 

---

function resetPanSamples

void KineticHandler::resetPanSamples () 

---

function resetZoomSamples

void KineticHandler::resetZoomSamples () 

---

function startPanInertia

void KineticHandler::startPanInertia () 

---

function startZoomInertia

void KineticHandler::startZoomInertia (
    center
) 

---

function stopAll

void KineticHandler::stopAll () 

---

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