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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2017 Martin Gräßlin <mgraesslin@kde.org>
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; either version 2 of the License, or
(at your option) any later version.
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 KWIN_GESTURES_H
#define KWIN_GESTURES_H
#include <kwin_export.h>
#include <QObject>
#include <QPointF>
#include <QSizeF>
#include <QMap>
#include <QVector>
namespace KWin
{
class Gesture : public QObject
{
Q_OBJECT
public:
~Gesture() override;
protected:
explicit Gesture(QObject *parent);
Q_SIGNALS:
/**
* Matching of a gesture started and this Gesture might match.
* On further evaluation either the signal @link{triggered} or
* @link{cancelled} will get emitted.
**/
void started();
/**
* Gesture matching ended and this Gesture matched.
**/
void triggered();
/**
* This Gesture no longer matches.
**/
void cancelled();
};
class SwipeGesture : public Gesture
{
Q_OBJECT
public:
enum class Direction {
Down,
Left,
Up,
Right
};
explicit SwipeGesture(QObject *parent = nullptr);
~SwipeGesture() override;
bool minimumFingerCountIsRelevant() const {
return m_minimumFingerCountRelevant;
}
void setMinimumFingerCount(uint count) {
m_minimumFingerCount = count;
m_minimumFingerCountRelevant = true;
}
uint minimumFingerCount() const {
return m_minimumFingerCount;
}
bool maximumFingerCountIsRelevant() const {
return m_maximumFingerCountRelevant;
}
void setMaximumFingerCount(uint count) {
m_maximumFingerCount = count;
m_maximumFingerCountRelevant = true;
}
uint maximumFingerCount() const {
return m_maximumFingerCount;
}
Direction direction() const {
return m_direction;
}
void setDirection(Direction direction) {
m_direction = direction;
}
void setMinimumX(int x) {
m_minimumX = x;
m_minimumXRelevant = true;
}
int minimumX() const {
return m_minimumX;
}
bool minimumXIsRelevant() const {
return m_minimumXRelevant;
}
void setMinimumY(int y) {
m_minimumY = y;
m_minimumYRelevant = true;
}
int minimumY() const {
return m_minimumY;
}
bool minimumYIsRelevant() const {
return m_minimumYRelevant;
}
void setMaximumX(int x) {
m_maximumX = x;
m_maximumXRelevant = true;
}
int maximumX() const {
return m_maximumX;
}
bool maximumXIsRelevant() const {
return m_maximumXRelevant;
}
void setMaximumY(int y) {
m_maximumY = y;
m_maximumYRelevant = true;
}
int maximumY() const {
return m_maximumY;
}
bool maximumYIsRelevant() const {
return m_maximumYRelevant;
}
void setStartGeometry(const QRect &geometry);
QSizeF minimumDelta() const {
return m_minimumDelta;
}
void setMinimumDelta(const QSizeF &delta) {
m_minimumDelta = delta;
m_minimumDeltaRelevant = true;
}
bool isMinimumDeltaRelevant() const {
return m_minimumDeltaRelevant;
}
qreal minimumDeltaReachedProgress(const QSizeF &delta) const;
bool minimumDeltaReached(const QSizeF &delta) const;
Q_SIGNALS:
/**
* The progress of the gesture if a @link{minimumDelta} is set.
* The progress is reported in [0.0,1.0]
**/
void progress(qreal);
private:
bool m_minimumFingerCountRelevant = false;
uint m_minimumFingerCount = 0;
bool m_maximumFingerCountRelevant = false;
uint m_maximumFingerCount = 0;
Direction m_direction = Direction::Down;
bool m_minimumXRelevant = false;
int m_minimumX = 0;
bool m_minimumYRelevant = false;
int m_minimumY = 0;
bool m_maximumXRelevant = false;
int m_maximumX = 0;
bool m_maximumYRelevant = false;
int m_maximumY = 0;
bool m_minimumDeltaRelevant = false;
QSizeF m_minimumDelta;
};
class KWIN_EXPORT GestureRecognizer : public QObject
{
Q_OBJECT
public:
GestureRecognizer(QObject *parent = nullptr);
~GestureRecognizer() override;
void registerGesture(Gesture *gesture);
void unregisterGesture(Gesture *gesture);
int startSwipeGesture(uint fingerCount) {
return startSwipeGesture(fingerCount, QPointF(), StartPositionBehavior::Irrelevant);
}
int startSwipeGesture(const QPointF &startPos) {
return startSwipeGesture(1, startPos, StartPositionBehavior::Relevant);
}
void updateSwipeGesture(const QSizeF &delta);
void cancelSwipeGesture();
void endSwipeGesture();
private:
void cancelActiveSwipeGestures();
enum class StartPositionBehavior {
Relevant,
Irrelevant
};
int startSwipeGesture(uint fingerCount, const QPointF &startPos, StartPositionBehavior startPosBehavior);
QVector<Gesture*> m_gestures;
QVector<Gesture*> m_activeSwipeGestures;
QMap<Gesture*, QMetaObject::Connection> m_destroyConnections;
QVector<QSizeF> m_swipeUpdates;
};
}
Q_DECLARE_METATYPE(KWin::SwipeGesture::Direction)
#endif
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