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TouchDispatcher.h
/*
* Copyright (C) 2014-2015 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LOMIRI_TOUCH_DISPATCHER_H
#define LOMIRI_TOUCH_DISPATCHER_H
#include "LomiriGesturesQmlGlobal.h"
#include <QPointer>
#include <QQuickItem>
/*
Dispatches touches to the given target, converting the touch point
coordinates accordingly.
Also takes care of synthesizing mouse events in case the target
doesn't work with touch events.
*/
class LOMIRIGESTURESQML_EXPORT TouchDispatcher {
public:
TouchDispatcher();
void setTargetItem(QQuickItem *target);
QQuickItem *targetItem() { return m_targetItem; }
void dispatch(QTouchDevice *device,
Qt::KeyboardModifiers modifiers,
const QList<QTouchEvent::TouchPoint> &touchPoints,
QWindow *window,
ulong timestamp);
void reset();
enum Status {
NoActiveTouch,
DeliveringTouchEvents,
DeliveringMouseEvents,
TargetRejectedTouches
};
private:
void dispatchTouchBegin(
QTouchDevice *device,
Qt::KeyboardModifiers modifiers,
const QList<QTouchEvent::TouchPoint> &touchPoints,
QWindow *window,
ulong timestamp);
void dispatchAsTouch(QEvent::Type eventType,
QTouchDevice *device,
Qt::KeyboardModifiers modifiers,
const QList<QTouchEvent::TouchPoint> &touchPoints,
QWindow *window,
ulong timestamp);
void dispatchAsMouse(
QTouchDevice *device,
Qt::KeyboardModifiers modifiers,
const QList<QTouchEvent::TouchPoint> &touchPoints,
ulong timestamp);
static void transformTouchPoints(QList<QTouchEvent::TouchPoint> &touchPoints, const QTransform &transform);
QTouchEvent *createQTouchEvent(QEvent::Type eventType,
QTouchDevice *device,
Qt::KeyboardModifiers modifiers,
const QList<QTouchEvent::TouchPoint> &touchPoints,
QWindow *window,
ulong timestamp);
QMouseEvent *touchToMouseEvent(QEvent::Type type, const QTouchEvent::TouchPoint &p,
ulong timestamp, Qt::KeyboardModifiers modifiers, bool transformNeeded = true);
bool checkIfDoubleClicked(ulong newPressEventTimestamp);
void setStatus(Status status);
static QEvent::Type resolveEventType(const QList<QTouchEvent::TouchPoint> &touchPoints);
QPointer<QQuickItem> m_targetItem;
Status m_status;
int m_touchMouseId;
ulong m_touchMousePressTimestamp;
};
#endif // LOMIRI_TOUCH_DISPATCHER_H