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Diffstat (limited to 'src/gui/util/qflickgesture.cpp')
| -rw-r--r-- | src/gui/util/qflickgesture.cpp | 715 |
1 files changed, 0 insertions, 715 deletions
diff --git a/src/gui/util/qflickgesture.cpp b/src/gui/util/qflickgesture.cpp deleted file mode 100644 index 07eca6c..0000000 --- a/src/gui/util/qflickgesture.cpp +++ /dev/null @@ -1,715 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** This file may be used under the terms of the GNU Lesser General Public -** License version 2.1 as published by the Free Software Foundation and -** appearing in the file LICENSE.LGPL included in the packaging of this -** file. Please review the following information to ensure the GNU Lesser -** General Public License version 2.1 requirements will be met: -** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qgesture.h" -#include "qapplication.h" -#include "qevent.h" -#include "qwidget.h" -#include "qgraphicsitem.h" -#include "qgraphicsscene.h" -#include "qgraphicssceneevent.h" -#include "qgraphicsview.h" -#include "qscroller.h" -#include "private/qevent_p.h" -#include "private/qflickgesture_p.h" -#include "qdebug.h" - -#ifndef QT_NO_GESTURES - -QT_BEGIN_NAMESPACE - -//#define QFLICKGESTURE_DEBUG - -#ifdef QFLICKGESTURE_DEBUG -# define qFGDebug qDebug -#else -# define qFGDebug while (false) qDebug -#endif - -extern bool qt_sendSpontaneousEvent(QObject *receiver, QEvent *event); - -static QMouseEvent *copyMouseEvent(QEvent *e) -{ - switch (e->type()) { - case QEvent::MouseButtonPress: - case QEvent::MouseButtonRelease: - case QEvent::MouseMove: { - QMouseEvent *me = static_cast<QMouseEvent *>(e); - return new QMouseEvent(me->type(), QPoint(0, 0), me->globalPos(), me->button(), me->buttons(), me->modifiers()); - } -#ifndef QT_NO_GRAPHICSVIEW - case QEvent::GraphicsSceneMousePress: - case QEvent::GraphicsSceneMouseRelease: - case QEvent::GraphicsSceneMouseMove: { - QGraphicsSceneMouseEvent *me = static_cast<QGraphicsSceneMouseEvent *>(e); -#if 1 - QEvent::Type met = me->type() == QEvent::GraphicsSceneMousePress ? QEvent::MouseButtonPress : - (me->type() == QEvent::GraphicsSceneMouseRelease ? QEvent::MouseButtonRelease : QEvent::MouseMove); - return new QMouseEvent(met, QPoint(0, 0), me->screenPos(), me->button(), me->buttons(), me->modifiers()); -#else - QGraphicsSceneMouseEvent *copy = new QGraphicsSceneMouseEvent(me->type()); - copy->setPos(me->pos()); - copy->setScenePos(me->scenePos()); - copy->setScreenPos(me->screenPos()); - for (int i = 0x1; i <= 0x10; i <<= 1) { - Qt::MouseButton button = Qt::MouseButton(i); - copy->setButtonDownPos(button, me->buttonDownPos(button)); - copy->setButtonDownScenePos(button, me->buttonDownScenePos(button)); - copy->setButtonDownScreenPos(button, me->buttonDownScreenPos(button)); - } - copy->setLastPos(me->lastPos()); - copy->setLastScenePos(me->lastScenePos()); - copy->setLastScreenPos(me->lastScreenPos()); - copy->setButtons(me->buttons()); - copy->setButton(me->button()); - copy->setModifiers(me->modifiers()); - return copy; -#endif - } -#endif // QT_NO_GRAPHICSVIEW - default: - return 0; - } -} - -class PressDelayHandler : public QObject -{ -private: - PressDelayHandler(QObject *parent = 0) - : QObject(parent) - , pressDelayTimer(0) - , sendingEvent(false) - , mouseButton(Qt::NoButton) - , mouseTarget(0) - { } - - static PressDelayHandler *inst; - -public: - enum { - UngrabMouseBefore = 1, - RegrabMouseAfterwards = 2 - }; - - static PressDelayHandler *instance() - { - static PressDelayHandler *inst = 0; - if (!inst) - inst = new PressDelayHandler(QCoreApplication::instance()); - return inst; - } - - bool shouldEventBeIgnored(QEvent *) const - { - return sendingEvent; - } - - bool isDelaying() const - { - return !pressDelayEvent.isNull(); - } - - void pressed(QEvent *e, int delay) - { - if (!pressDelayEvent) { - pressDelayEvent.reset(copyMouseEvent(e)); - pressDelayTimer = startTimer(delay); - mouseTarget = QApplication::widgetAt(pressDelayEvent->globalPos()); - mouseButton = pressDelayEvent->button(); - qFGDebug() << "QFG: consuming/delaying mouse press"; - } else { - qFGDebug() << "QFG: NOT consuming/delaying mouse press"; - } - e->setAccepted(true); - } - - bool released(QEvent *e, bool scrollerWasActive, bool scrollerIsActive) - { - // consume this event if the scroller was or is active - bool result = scrollerWasActive || scrollerIsActive; - - // stop the timer - if (pressDelayTimer) { - killTimer(pressDelayTimer); - pressDelayTimer = 0; - } - // we still haven't even sent the press, so do it now - if (pressDelayEvent && mouseTarget && !scrollerIsActive) { - QScopedPointer<QMouseEvent> releaseEvent(copyMouseEvent(e)); - - qFGDebug() << "QFG: re-sending mouse press (due to release) for " << mouseTarget; - sendMouseEvent(pressDelayEvent.data(), UngrabMouseBefore); - - qFGDebug() << "QFG: faking mouse release (due to release) for " << mouseTarget; - sendMouseEvent(releaseEvent.data()); - - result = true; // consume this event - } else if (mouseTarget && scrollerIsActive) { - // we grabbed the mouse expicitly when the scroller became active, so undo that now - sendMouseEvent(0, UngrabMouseBefore); - } - pressDelayEvent.reset(0); - mouseTarget = 0; - return result; - } - - void scrollerWasIntercepted() - { - qFGDebug() << "QFG: deleting delayed mouse press, since scroller was only intercepted"; - if (pressDelayEvent) { - // we still haven't even sent the press, so just throw it away now - if (pressDelayTimer) { - killTimer(pressDelayTimer); - pressDelayTimer = 0; - } - pressDelayEvent.reset(0); - } - mouseTarget = 0; - } - - void scrollerBecameActive() - { - if (pressDelayEvent) { - // we still haven't even sent the press, so just throw it away now - qFGDebug() << "QFG: deleting delayed mouse press, since scroller is active now"; - if (pressDelayTimer) { - killTimer(pressDelayTimer); - pressDelayTimer = 0; - } - pressDelayEvent.reset(0); - mouseTarget = 0; - } else if (mouseTarget) { - // we did send a press, so we need to fake a release now - - // release all pressed mouse buttons - /* Qt::MouseButtons mouseButtons = QApplication::mouseButtons(); - for (int i = 0; i < 32; ++i) { - if (mouseButtons & (1 << i)) { - Qt::MouseButton b = static_cast<Qt::MouseButton>(1 << i); - mouseButtons &= ~b; - QPoint farFarAway(-QWIDGETSIZE_MAX, -QWIDGETSIZE_MAX); - - qFGDebug() << "QFG: sending a fake mouse release at far-far-away to " << mouseTarget; - QMouseEvent re(QEvent::MouseButtonRelease, QPoint(), farFarAway, - b, mouseButtons, QApplication::keyboardModifiers()); - sendMouseEvent(&re); - } - }*/ - - QPoint farFarAway(-QWIDGETSIZE_MAX, -QWIDGETSIZE_MAX); - - qFGDebug() << "QFG: sending a fake mouse release at far-far-away to " << mouseTarget; - QMouseEvent re(QEvent::MouseButtonRelease, QPoint(), farFarAway, - mouseButton, QApplication::mouseButtons() & ~mouseButton, - QApplication::keyboardModifiers()); - sendMouseEvent(&re, RegrabMouseAfterwards); - // don't clear the mouseTarget just yet, since we need to explicitly ungrab the mouse on release! - } - } - -protected: - void timerEvent(QTimerEvent *e) - { - if (e->timerId() == pressDelayTimer) { - if (pressDelayEvent && mouseTarget) { - qFGDebug() << "QFG: timer event: re-sending mouse press to " << mouseTarget; - sendMouseEvent(pressDelayEvent.data(), UngrabMouseBefore); - } - pressDelayEvent.reset(0); - - if (pressDelayTimer) { - killTimer(pressDelayTimer); - pressDelayTimer = 0; - } - } - } - - void sendMouseEvent(QMouseEvent *me, int flags = 0) - { - if (mouseTarget) { - sendingEvent = true; - -#ifndef QT_NO_GRAPHICSVIEW - QGraphicsItem *grabber = 0; - if (mouseTarget->parentWidget()) { - if (QGraphicsView *gv = qobject_cast<QGraphicsView *>(mouseTarget->parentWidget())) { - if (gv->scene()) - grabber = gv->scene()->mouseGrabberItem(); - } - } - - if (grabber && (flags & UngrabMouseBefore)) { - // GraphicsView Mouse Handling Workaround #1: - // we need to ungrab the mouse before re-sending the press, - // since the scene had already set the mouse grabber to the - // original (and consumed) event's receiver - qFGDebug() << "QFG: ungrabbing" << grabber; - grabber->ungrabMouse(); - } -#endif // QT_NO_GRAPHICSVIEW - - if (me) { - QMouseEvent copy(me->type(), mouseTarget->mapFromGlobal(me->globalPos()), me->globalPos(), me->button(), me->buttons(), me->modifiers()); - qt_sendSpontaneousEvent(mouseTarget, ©); - } - -#ifndef QT_NO_GRAPHICSVIEW - if (grabber && (flags & RegrabMouseAfterwards)) { - // GraphicsView Mouse Handling Workaround #2: - // we need to re-grab the mouse after sending a faked mouse - // release, since we still need the mouse moves for the gesture - // (the scene will clear the item's mouse grabber status on - // release). - qFGDebug() << "QFG: re-grabbing" << grabber; - grabber->grabMouse(); - } -#endif - sendingEvent = false; - } - } - - -private: - int pressDelayTimer; - QScopedPointer<QMouseEvent> pressDelayEvent; - bool sendingEvent; - Qt::MouseButton mouseButton; - QPointer<QWidget> mouseTarget; -}; - - -/*! - \internal - \class QFlickGesture - \since 4.8 - \brief The QFlickGesture class describes a flicking gesture made by the user. - \ingroup gestures - The QFlickGesture is more complex than the QPanGesture that uses QScroller and QScrollerProperties - to decide if it is triggered. - This gesture is reacting on touch event as compared to the QMouseFlickGesture. - - \sa {Gestures Programming}, QScroller, QScrollerProperties, QMouseFlickGesture -*/ - -/*! - \internal -*/ -QFlickGesture::QFlickGesture(QObject *receiver, Qt::MouseButton button, QObject *parent) - : QGesture(*new QFlickGesturePrivate, parent) -{ - d_func()->q_ptr = this; - d_func()->receiver = receiver; - d_func()->receiverScroller = (receiver && QScroller::hasScroller(receiver)) ? QScroller::scroller(receiver) : 0; - d_func()->button = button; -} - -QFlickGesture::~QFlickGesture() -{ } - -QFlickGesturePrivate::QFlickGesturePrivate() - : receiverScroller(0), button(Qt::NoButton), macIgnoreWheel(false) -{ } - - -// -// QFlickGestureRecognizer -// - - -QFlickGestureRecognizer::QFlickGestureRecognizer(Qt::MouseButton button) -{ - this->button = button; -} - -/*! \reimp - */ -QGesture *QFlickGestureRecognizer::create(QObject *target) -{ -#ifndef QT_NO_GRAPHICSVIEW - QGraphicsObject *go = qobject_cast<QGraphicsObject*>(target); - if (go && button == Qt::NoButton) { - go->setAcceptTouchEvents(true); - } -#endif - return new QFlickGesture(target, button); -} - -/*! \internal - The recognize function detects a touch event suitable to start the attached QScroller. - The QFlickGesture will be triggered as soon as the scroller is no longer in the state - QScroller::Inactive or QScroller::Pressed. It will be finished or canceled - at the next QEvent::TouchEnd. - Note that the QScroller might continue scrolling (kinetically) at this point. - */ -QGestureRecognizer::Result QFlickGestureRecognizer::recognize(QGesture *state, - QObject *watched, - QEvent *event) -{ - Q_UNUSED(watched); - - static QElapsedTimer monotonicTimer; - if (!monotonicTimer.isValid()) - monotonicTimer.start(); - - QFlickGesture *q = static_cast<QFlickGesture *>(state); - QFlickGesturePrivate *d = q->d_func(); - - QScroller *scroller = d->receiverScroller; - if (!scroller) - return Ignore; // nothing to do without a scroller? - - QWidget *receiverWidget = qobject_cast<QWidget *>(d->receiver); -#ifndef QT_NO_GRAPHICSVIEW - QGraphicsObject *receiverGraphicsObject = qobject_cast<QGraphicsObject *>(d->receiver); -#endif - - // this is only set for events that we inject into the event loop via sendEvent() - if (PressDelayHandler::instance()->shouldEventBeIgnored(event)) { - //qFGDebug() << state << "QFG: ignored event: " << event->type(); - return Ignore; - } - - const QMouseEvent *me = 0; -#ifndef QT_NO_GRAPHICSVIEW - const QGraphicsSceneMouseEvent *gsme = 0; -#endif - const QTouchEvent *te = 0; - QPoint globalPos; - - // qFGDebug() << "FlickGesture "<<state<<"watched:"<<watched<<"receiver"<<d->receiver<<"event"<<event->type()<<"button"<<button; - - switch (event->type()) { - case QEvent::MouseButtonPress: - case QEvent::MouseButtonRelease: - case QEvent::MouseMove: - if (!receiverWidget) - return Ignore; - if (button != Qt::NoButton) { - me = static_cast<const QMouseEvent *>(event); - globalPos = me->globalPos(); - } - break; -#ifndef QT_NO_GRAPHICSVIEW - case QEvent::GraphicsSceneMousePress: - case QEvent::GraphicsSceneMouseRelease: - case QEvent::GraphicsSceneMouseMove: - if (!receiverGraphicsObject) - return Ignore; - if (button != Qt::NoButton) { - gsme = static_cast<const QGraphicsSceneMouseEvent *>(event); - globalPos = gsme->screenPos(); - } - break; -#endif - case QEvent::TouchBegin: - case QEvent::TouchEnd: - case QEvent::TouchUpdate: - if (button == Qt::NoButton) { - te = static_cast<const QTouchEvent *>(event); - if (!te->touchPoints().isEmpty()) - globalPos = te->touchPoints().at(0).screenPos().toPoint(); - } - break; - -#if defined(Q_WS_MAC) - // the only way to distinguish between real mouse wheels and wheel - // events generated by the native 2 finger swipe gesture is to listen - // for these events (according to Apple's Cocoa Event-Handling Guide) - - case QEvent::NativeGesture: { - QNativeGestureEvent *nge = static_cast<QNativeGestureEvent *>(event); - if (nge->gestureType == QNativeGestureEvent::GestureBegin) - d->macIgnoreWheel = true; - else if (nge->gestureType == QNativeGestureEvent::GestureEnd) - d->macIgnoreWheel = false; - break; - } -#endif - - // consume all wheel events if the scroller is active - case QEvent::Wheel: - if (d->macIgnoreWheel || (scroller->state() != QScroller::Inactive)) - return Ignore | ConsumeEventHint; - break; - - // consume all dbl click events if the scroller is active - case QEvent::MouseButtonDblClick: - if (scroller->state() != QScroller::Inactive) - return Ignore | ConsumeEventHint; - break; - - default: - break; - } - - if (!me -#ifndef QT_NO_GRAPHICSVIEW - && !gsme -#endif - && !te) // Neither mouse nor touch - return Ignore; - - // get the current pointer position in local coordinates. - QPointF point; - QScroller::Input inputType = (QScroller::Input) 0; - - switch (event->type()) { - case QEvent::MouseButtonPress: - if (me && me->button() == button && me->buttons() == button) { - point = me->globalPos(); - inputType = QScroller::InputPress; - } else if (me) { - scroller->stop(); - return CancelGesture; - } - break; - case QEvent::MouseButtonRelease: - if (me && me->button() == button) { - point = me->globalPos(); - inputType = QScroller::InputRelease; - } - break; - case QEvent::MouseMove: -#ifdef Q_OS_SYMBIAN - // Qt on Symbian tracks the button state internally, while Qt on Win/Mac/Unix - // relies on the windowing system to report the current buttons state. - if (me && (me->buttons() == button || !me->buttons())) { -#else - if (me && me->buttons() == button) { -#endif - point = me->globalPos(); - inputType = QScroller::InputMove; - } - break; - -#ifndef QT_NO_GRAPHICSVIEW - case QEvent::GraphicsSceneMousePress: - if (gsme && gsme->button() == button && gsme->buttons() == button) { - point = gsme->scenePos(); - inputType = QScroller::InputPress; - } else if (gsme) { - scroller->stop(); - return CancelGesture; - } - break; - case QEvent::GraphicsSceneMouseRelease: - if (gsme && gsme->button() == button) { - point = gsme->scenePos(); - inputType = QScroller::InputRelease; - } - break; - case QEvent::GraphicsSceneMouseMove: -#ifdef Q_OS_SYMBIAN - // Qt on Symbian tracks the button state internally, while Qt on Win/Mac/Unix - // relies on the windowing system to report the current buttons state. - if (gsme && (gsme->buttons() == button || !me->buttons())) { -#else - if (gsme && gsme->buttons() == button) { -#endif - point = gsme->scenePos(); - inputType = QScroller::InputMove; - } - break; -#endif - - case QEvent::TouchBegin: - inputType = QScroller::InputPress; - // fall through - case QEvent::TouchEnd: - if (!inputType) - inputType = QScroller::InputRelease; - // fallthrough - case QEvent::TouchUpdate: - if (!inputType) - inputType = QScroller::InputMove; - - if (te->deviceType() == QTouchEvent::TouchPad) { - if (te->touchPoints().count() != 2) // 2 fingers on pad - return Ignore; - - point = te->touchPoints().at(0).startScenePos() + - ((te->touchPoints().at(0).scenePos() - te->touchPoints().at(0).startScenePos()) + - (te->touchPoints().at(1).scenePos() - te->touchPoints().at(1).startScenePos())) / 2; - } else { // TouchScreen - if (te->touchPoints().count() != 1) // 1 finger on screen - return Ignore; - - point = te->touchPoints().at(0).scenePos(); - } - break; - - default: - break; - } - - // Check for an active scroller at globalPos - if (inputType == QScroller::InputPress) { - foreach (QScroller *as, QScroller::activeScrollers()) { - if (as != scroller) { - QRegion scrollerRegion; - - if (QWidget *w = qobject_cast<QWidget *>(as->target())) { - scrollerRegion = QRect(w->mapToGlobal(QPoint(0, 0)), w->size()); -#ifndef QT_NO_GRAPHICSVIEW - } else if (QGraphicsObject *go = qobject_cast<QGraphicsObject *>(as->target())) { - if (go->scene() && !go->scene()->views().isEmpty()) { - foreach (QGraphicsView *gv, go->scene()->views()) - scrollerRegion |= gv->mapFromScene(go->mapToScene(go->boundingRect())) - .translated(gv->mapToGlobal(QPoint(0, 0))); - } -#endif - } - // active scrollers always have priority - if (scrollerRegion.contains(globalPos)) - return Ignore; - } - } - } - - bool scrollerWasDragging = (scroller->state() == QScroller::Dragging); - bool scrollerWasScrolling = (scroller->state() == QScroller::Scrolling); - - if (inputType) { - if (QWidget *w = qobject_cast<QWidget *>(d->receiver)) - point = w->mapFromGlobal(point.toPoint()); -#ifndef QT_NO_GRAPHICSVIEW - else if (QGraphicsObject *go = qobject_cast<QGraphicsObject *>(d->receiver)) - point = go->mapFromScene(point); -#endif - - // inform the scroller about the new event - scroller->handleInput(inputType, point, monotonicTimer.elapsed()); - } - - // depending on the scroller state return the gesture state - Result result(0); - bool scrollerIsActive = (scroller->state() == QScroller::Dragging || - scroller->state() == QScroller::Scrolling); - - // Consume all mouse events while dragging or scrolling to avoid nasty - // side effects with Qt's standard widgets. - if ((me -#ifndef QT_NO_GRAPHICSVIEW - || gsme -#endif - ) && scrollerIsActive) - result |= ConsumeEventHint; - - // The only problem with this approach is that we consume the - // MouseRelease when we start the scrolling with a flick gesture, so we - // have to fake a MouseRelease "somewhere" to not mess with the internal - // states of Qt's widgets (a QPushButton would stay in 'pressed' state - // forever, if it doesn't receive a MouseRelease). - if (me -#ifndef QT_NO_GRAPHICSVIEW - || gsme -#endif - ) { - if (!scrollerWasDragging && !scrollerWasScrolling && scrollerIsActive) - PressDelayHandler::instance()->scrollerBecameActive(); - else if (scrollerWasScrolling && (scroller->state() == QScroller::Dragging || scroller->state() == QScroller::Inactive)) - PressDelayHandler::instance()->scrollerWasIntercepted(); - } - - if (!inputType) { - result |= Ignore; - } else { - switch (event->type()) { - case QEvent::MouseButtonPress: -#ifndef QT_NO_GRAPHICSVIEW - case QEvent::GraphicsSceneMousePress: -#endif - if (scroller->state() == QScroller::Pressed) { - int pressDelay = int(1000 * scroller->scrollerProperties().scrollMetric(QScrollerProperties::MousePressEventDelay).toReal()); - if (pressDelay > 0) { - result |= ConsumeEventHint; - - PressDelayHandler::instance()->pressed(event, pressDelay); - event->accept(); - } - } - // fall through - case QEvent::TouchBegin: - q->setHotSpot(globalPos); - result |= scrollerIsActive ? TriggerGesture : MayBeGesture; - break; - - case QEvent::MouseMove: -#ifndef QT_NO_GRAPHICSVIEW - case QEvent::GraphicsSceneMouseMove: -#endif - if (PressDelayHandler::instance()->isDelaying()) - result |= ConsumeEventHint; - // fall through - case QEvent::TouchUpdate: - result |= scrollerIsActive ? TriggerGesture : Ignore; - break; - -#ifndef QT_NO_GRAPHICSVIEW - case QEvent::GraphicsSceneMouseRelease: -#endif - case QEvent::MouseButtonRelease: - if (PressDelayHandler::instance()->released(event, scrollerWasDragging || scrollerWasScrolling, scrollerIsActive)) - result |= ConsumeEventHint; - // fall through - case QEvent::TouchEnd: - result |= scrollerIsActive ? FinishGesture : CancelGesture; - break; - - default: - result |= Ignore; - break; - } - } - return result; -} - - -/*! \reimp - */ -void QFlickGestureRecognizer::reset(QGesture *state) -{ - QGestureRecognizer::reset(state); -} - -QT_END_NAMESPACE - -#endif // QT_NO_GESTURES |