~mterry/unity8/power-button-on-lock

/*

 * Copyright (C) 2014 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 UBUNTU_TOUCH_DISPATCHER_H

#define UBUNTU_TOUCH_DISPATCHER_H

 

#include "UbuntuGesturesQmlGlobal.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 UBUNTUGESTURESQML_EXPORT TouchDispatcher {

public:

    TouchDispatcher();

 

    void setTargetItem(QQuickItem *target);

    QQuickItem *targetItem() { return m_targetItem; }

 

    void dispatch(QEvent::Type eventType,

            QTouchDevice *device,

            Qt::KeyboardModifiers modifiers,

            const QList<QTouchEvent::TouchPoint> &touchPoints,

            QWindow *window,

            ulong timestamp);

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);

 

    QPointer<QQuickItem> m_targetItem;

 

    enum {

        NoActiveTouch,

        DeliveringTouchEvents,

        DeliveringMouseEvents,

        TargetRejectedTouches

    } m_status;

 

    int m_touchMouseId;

    ulong m_touchMousePressTimestamp;

};

 

#endif // UBUNTU_TOUCH_DISPATCHER_H