mirror of
https://invent.kde.org/marcoa/shift-shell.git
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3adcd1d51c
This adds support for touchpad scrolling in various shell components, such as the lockscreen, homescreen and action drawer. Currently TODO because it appears to be very buggy when there is a control underneath that also accepts touchpad input (ex. flickable). The touchpad scroll start appears to get called by Qt, but not the end event, so I am unable to "let go" of the flick. Not sure if it's a wayland issue. This also appears to not work in the nested KWin session, not sure if it's because of libinput or something
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
// SPDX-FileCopyrightText: 2023 Devin Lin <espidev@gmail.com>
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// SPDX-License-Identifier: LGPL-2.0-or-later
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#pragma once
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#include <QMouseEvent>
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#include <QPointF>
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#include <QPointerEvent>
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#include <QQmlListProperty>
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#include <QQuickItem>
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#include <QTouchEvent>
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/**
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* @short A component that provides access to swipes over its children, similar to Flickable.
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* However, it does not do any of the positioning Flickable does, and so it
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* can be used to build custom components with specialized swiping needs (ex. panels)
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*
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* TODO: New fingers that come in should steal from the old finger
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*
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* @author Devin Lin <devin@kde.org>
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*/
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class SwipeArea : public QQuickItem
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{
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Q_OBJECT
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QML_ELEMENT
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Q_PROPERTY(SwipeArea::Mode mode READ mode WRITE setMode NOTIFY modeChanged)
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Q_PROPERTY(bool interactive READ interactive WRITE setInteractive NOTIFY interactiveChanged)
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Q_PROPERTY(bool moving READ moving NOTIFY movingChanged)
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Q_PROPERTY(bool pressed READ pressed NOTIFY pressedChanged)
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public:
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SwipeArea(QQuickItem *parent = nullptr);
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enum Mode { BothAxis = 0, VerticalOnly, HorizontalOnly };
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Q_ENUM(Mode)
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Mode mode() const;
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void setMode(Mode mode);
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bool interactive() const;
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void setInteractive(bool interactive);
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bool moving() const;
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bool pressed() const;
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Q_INVOKABLE void setSkipSwipeThreshold(bool value);
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Q_SIGNALS:
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void modeChanged();
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void interactiveChanged();
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void movingChanged();
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void pressedChanged();
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void swipeEnded();
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void swipeStarted(QPointF currentPoint, QPointF startPoint); // we let the user move a couple of pixels for swipe detection
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// deltaX, deltaY - amount moved since last swipeMove()
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// totalDeltaX, totalDeltaY - amount move since startedSwipe()
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void swipeMove(qreal totalDeltaX, qreal totalDeltaY, qreal deltaX, qreal deltaY);
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void touchpadScrollStarted(QPointF point);
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void touchpadScrollEnded();
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void touchpadScrollMove(qreal totalDeltaX, qreal totalDeltaY, qreal deltaX, qreal deltaY);
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protected:
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bool childMouseEventFilter(QQuickItem *item, QEvent *event) override;
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void mouseMoveEvent(QMouseEvent *event) override;
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void mousePressEvent(QMouseEvent *event) override;
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void mouseReleaseEvent(QMouseEvent *event) override;
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void mouseUngrabEvent() override;
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void touchEvent(QTouchEvent *event) override;
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void touchUngrabEvent() override;
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void wheelEvent(QWheelEvent *event) override;
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private:
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void setMoving(bool moving);
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void setPressed(bool pressed);
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bool filterPointerEvent(QQuickItem *receiver, QPointerEvent *event);
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void handlePressEvent(QPointerEvent *event, QPointF point);
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void handleReleaseEvent(QPointerEvent *event, QPointF point);
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void handleMoveEvent(QPointerEvent *event, QPointF point);
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void resetSwipe();
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Mode m_mode = Mode::BothAxis;
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bool m_interactive = true;
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bool m_pressed = false;
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bool m_touchpadScrolling = false;
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// whether we have started a flick
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bool m_moving = false;
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// whether on this current flick, we want to steal the mouse/touch event from children
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bool m_stealMouse = false;
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// the point where the user pressed down on at the start of the interaction
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QPointF m_pressPos;
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// the point where the swipe actually started being registered (can be some distance from the pressed position)
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QPointF m_startPos;
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// the previous point where interaction was at
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QPointF m_lastPos;
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// whether to skip trying to measure the swipe threshold
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bool m_skipSwipeThreshold;
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// the total amount of distance scrolled
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QPointF m_totalScrollDelta;
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};
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QML_DECLARE_TYPE(SwipeArea)
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