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Diffstat (limited to 'touchy/qscrollareakineticscroller.cpp')
| -rw-r--r-- | touchy/qscrollareakineticscroller.cpp | 384 |
1 files changed, 0 insertions, 384 deletions
diff --git a/touchy/qscrollareakineticscroller.cpp b/touchy/qscrollareakineticscroller.cpp deleted file mode 100644 index 0a00b4e..0000000 --- a/touchy/qscrollareakineticscroller.cpp +++ /dev/null @@ -1,384 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, 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. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <qscrollareakineticscroller.h> -#include <QApplication> -#include <QGraphicsView> -#include <QAbstractScrollArea> -#include <QScrollBar> -#include <QItemSelection> -#include <QPointF> -#include <QPointer> -#include <QMouseEvent> -#if QT_VERSION < 0x040700 -# include <QTime> -#else -# include <QElapsedTimer> -#endif - -#include "qabstractitemview.h" -#include "qgraphicsview.h" -#include "qgraphicsitem.h" - - - -#include <QtDebug> - -QT_BEGIN_NAMESPACE - - -bool qt_sendSpontaneousEvent(QObject *receiver, QEvent *event) -{ - return QCoreApplication::sendSpontaneousEvent(receiver, event); -} - - - -class Q_GUI_EXPORT QScrollAreaKineticScrollerPrivate -{ -public: - QScrollAreaKineticScroller *q_ptr; - - QAbstractScrollArea *area; - QItemSelection oldSelection; // the selection before the first mouse down - bool ignoreEvents; - bool touchActive; - QPoint lastOvershoot; // don't change the type to QPointF or we might never shoot completely back. - QPointer<QWidget> childWidget; // the widget where the mouse was pressed - QPointF fractionalPosition; - -#if QT_VERSION < 0x040700 - QTime timer; -#else - QElapsedTimer timer; -#endif - - QScrollAreaKineticScrollerPrivate() - : q_ptr(0) - , area(0) - , ignoreEvents(false) - , touchActive(false) - {} - - void init() - { - timer.start(); - } - - static QWidget *mouseTransparentChildAtGlobalPos(QWidget *parent, const QPoint &gp) - { - foreach (QWidget *w, parent->findChildren<QWidget *>()) { - if (w && !w->isWindow() && w->isVisible() && (w->rect().contains(w->mapFromGlobal(gp)))) { - if (QWidget *t = mouseTransparentChildAtGlobalPos(w, gp)) - return t; - else - return w; - } - } - return 0; - } - - void sendEvent(QWidget *w, QEvent *e) - { - ignoreEvents = true; - qt_sendSpontaneousEvent(w, e); - ignoreEvents = false; - } -}; - -/*! - * The QScrollAreaKineticScroller class implements the QKineticScroller for the AbstractScrollArea - */ -QScrollAreaKineticScroller::QScrollAreaKineticScroller() - : QObject() - , QKineticScroller() - , d_ptr(new QScrollAreaKineticScrollerPrivate()) -{ - Q_D(QScrollAreaKineticScroller); - d->q_ptr = this; - d->init(); -} - -/*! - Destroys the scroller. -*/ -QScrollAreaKineticScroller::~QScrollAreaKineticScroller() -{} - -void QScrollAreaKineticScroller::setWidget(QAbstractScrollArea *widget) -{ - Q_D(QScrollAreaKineticScroller); - - if (d->area) { - d->area->viewport()->removeEventFilter(this); - d->area->viewport()->move(d->area->viewport()->pos() + d->lastOvershoot); - d->area->viewport()->setAttribute(Qt::WA_AcceptTouchEvents, false); - } - - reset(); - d->area = widget; - d->lastOvershoot = QPoint(); - d->fractionalPosition = QPointF(); - - setParent(d->area); - if (d->area) { - d->area->viewport()->setAttribute(Qt::WA_AcceptTouchEvents, true); - d->area->viewport()->installEventFilter(this); - if (QAbstractItemView *view = qobject_cast<QAbstractItemView *>(d->area)) { - view->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel); - view->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel); - } - } -} - -bool QScrollAreaKineticScroller::eventFilter(QObject *o, QEvent *e) -{ - Q_D(QScrollAreaKineticScroller); - - qint64 timestamp = d->timer.elapsed(); - bool res = false; - bool isMouseEvent = false; - bool isMouseDown = false; - - if (d->area && (o == d->area->viewport()) && - !d->ignoreEvents && d->area->isEnabled() && isEnabled()) { - switch (e->type()) { - case QEvent::TouchBegin: - case QEvent::TouchUpdate: - case QEvent::TouchEnd: { - Input type = (e->type() == QEvent::TouchBegin) ? InputPress : - ((e->type() == QEvent::TouchEnd) ? InputRelease : InputMove); - QTouchEvent *te = static_cast<QTouchEvent *>(e); - int idx = (te->deviceType() == QTouchEvent::TouchScreen) ? 0 : 1; - - if (te->touchPoints().count() == (idx + 1)) { - res = handleInput(type, te->touchPoints().at(idx).pos() - d->lastOvershoot, timestamp); - if (type == InputPress) - d->touchActive = true; - else if (type == InputRelease) - d->touchActive = false; - } - break; - } - case QEvent::Wheel: - // the two-finger gesture on the Mac is mapped to wheel events by default - res = d->touchActive; - break; - - case QEvent::MouseButtonPress: - // re-install the event filter so that we get the mouse release before all other filters. - // this is an evil hack, but hard to work around without prioritized event filters. - d->area->viewport()->removeEventFilter(this); - d->area->viewport()->installEventFilter(this); - // fall through - - case QEvent::MouseButtonDblClick: - isMouseDown = true; - // fall through - - case QEvent::MouseMove: - case QEvent::MouseButtonRelease: - if (!d->touchActive) { - Input type = (e->type() == QEvent::MouseButtonRelease) ? InputRelease : - ((e->type() == QEvent::MouseMove) ? InputMove : InputPress); - QMouseEvent *me = static_cast<QMouseEvent *>(e); - isMouseEvent = true; - res = handleInput(type, me->posF() - d->lastOvershoot, timestamp); - } - break; - - case QEvent::ChildAdded: - case QEvent::ChildRemoved: { - QChildEvent *ce = static_cast<QChildEvent *>(e); - if (ce->child()->isWidgetType()) { - static_cast<QWidget *>(ce->child())->setAttribute(Qt::WA_TransparentForMouseEvents, ce->added()); - if ((e->type() == QEvent::ChildRemoved) && (ce->child() == d->childWidget)) - d->childWidget = 0; - } - break; - } - default: - break; - } - } - - if (res) - e->accept(); - res |= QObject::eventFilter(o, e); - - // all child widgets get the WA_TransparentForMouseEvents attribute, so - // we have to find the "real" widget to forward this event to... - if (!res && isMouseEvent) { - QMouseEvent *me = static_cast<QMouseEvent *>(e); - - if (isMouseDown) - d->childWidget = d->mouseTransparentChildAtGlobalPos(d->area->viewport(), me->globalPos()); - - if (d->childWidget) { - QMouseEvent cme(me->type(), me->pos(), - me->globalPos(), me->button(), me->buttons(), me->modifiers()); - d->sendEvent(d->childWidget, &cme); - res = cme.isAccepted(); - } - } - return res; -} - -void QScrollAreaKineticScroller::stateChanged(State oldState) -{ - Q_D(QScrollAreaKineticScroller); - - // hack to remove the current selection as soon as we start to scroll - if (QAbstractItemView *view = qobject_cast<QAbstractItemView *>(d->area)) { - if (oldState == StateInactive) - d->oldSelection = view->selectionModel()->selection(); // store the selection - } -} - -bool QScrollAreaKineticScroller::canStartScrollingAt(const QPointF &pos) const -{ - Q_D(const QScrollAreaKineticScroller); - - // don't start scrolling when a drag mode has been set. - // don't start scrolling on a movable item. - if (QGraphicsView *view = qobject_cast<QGraphicsView *>(d->area)) { - if (view->dragMode() != QGraphicsView::NoDrag) - return false; - - QGraphicsItem *childItem = view->itemAt(pos.toPoint()); - - if (childItem && (childItem->flags() & QGraphicsItem::ItemIsMovable)) - return false; - } - - // don't start scrolling on a QSlider - if (qobject_cast<QSlider *>(d->mouseTransparentChildAtGlobalPos(d->area->viewport(), d->area->viewport()->mapToGlobal(pos.toPoint())))) { - return false; - } - - return true; -} - -void QScrollAreaKineticScroller::cancelPress(const QPointF &pressPos) -{ - Q_D(QScrollAreaKineticScroller); - - QPoint pos = pressPos.toPoint(); - - if (d->childWidget) { - if (d->touchActive) { - //TODO - // TouchUpdate + TouchEnd? - } else { - // simulate a mouse-move and mouse-release far, far away - QPoint faraway(-1000, -1000); - QMouseEvent cmem(QEvent::MouseMove, faraway, d->childWidget->mapToGlobal(faraway), - Qt::LeftButton, QApplication::mouseButtons() | Qt::LeftButton, - QApplication::keyboardModifiers()); - d->sendEvent(d->childWidget, &cmem); - - QMouseEvent cmer(QEvent::MouseButtonRelease, faraway, d->childWidget->mapToGlobal(faraway), - Qt::LeftButton, QApplication::mouseButtons() & ~Qt::LeftButton, - QApplication::keyboardModifiers()); - d->sendEvent(d->childWidget, &cmer); - } - } - - if (QAbstractItemView *view = qobject_cast<QAbstractItemView *>(d->area)) - view->selectionModel()->select(d->oldSelection, QItemSelectionModel::ClearAndSelect); -} - -QSizeF QScrollAreaKineticScroller::viewportSize() const -{ - Q_D(const QScrollAreaKineticScroller); - - return d->area ? QSizeF(d->area->viewport()->size()) : QSizeF(); -} - -QPointF QScrollAreaKineticScroller::maximumContentPosition() const -{ - Q_D(const QScrollAreaKineticScroller); - - QPointF p; - if (d->area) { - if (QScrollBar *s = d->area->horizontalScrollBar()) - p.setX(s->maximum()); - if (QScrollBar *s = d->area->verticalScrollBar()) - p.setY(s->maximum()); - } - return p; -} - -QPointF QScrollAreaKineticScroller::contentPosition() const -{ - Q_D(const QScrollAreaKineticScroller); - - QPointF p; - if (d->area) { - if (QScrollBar *s = d->area->horizontalScrollBar()) - p.setX(s->value()); - if (QScrollBar *s = d->area->verticalScrollBar()) - p.setY(s->value()); - p += d->fractionalPosition; - } - return p; -} - -void QScrollAreaKineticScroller::setContentPosition(const QPointF &p, const QPointF &overshootDelta) -{ - Q_D(QScrollAreaKineticScroller); - - if (d->area) { - if (QScrollBar *s = d->area->horizontalScrollBar()) - s->setValue(p.x()); - if (QScrollBar *s = d->area->verticalScrollBar()) - s->setValue(p.y()); - - QPoint delta = d->lastOvershoot - overshootDelta.toPoint(); - if (!delta.isNull()) - d->area->viewport()->move(d->area->viewport()->pos() + delta); - d->lastOvershoot -= delta; - - d->fractionalPosition = QPointF(p.x() - int(p.x()), p.y() - int(p.y())); - } -} - -QT_END_NAMESPACE |