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Diffstat (limited to 'src/declarative/graphicsitems/qmlgraphicspathview.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qmlgraphicspathview.cpp | 979 |
1 files changed, 0 insertions, 979 deletions
diff --git a/src/declarative/graphicsitems/qmlgraphicspathview.cpp b/src/declarative/graphicsitems/qmlgraphicspathview.cpp deleted file mode 100644 index 9a2c24d..0000000 --- a/src/declarative/graphicsitems/qmlgraphicspathview.cpp +++ /dev/null @@ -1,979 +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 QtDeclarative 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 "qmlgraphicspathview_p.h" -#include "qmlgraphicspathview_p_p.h" - -#include <qmlstate_p.h> -#include <qmlopenmetaobject_p.h> - -#include <QDebug> -#include <QEvent> -#include <qlistmodelinterface_p.h> -#include <QGraphicsSceneEvent> - -#include <math.h> - -QT_BEGIN_NAMESPACE - -inline qreal qmlMod(qreal x, qreal y) -{ -#ifdef QT_USE_MATH_H_FLOATS - if(sizeof(qreal) == sizeof(float)) - return fmodf(float(x), float(y)); - else -#endif - return fmod(x, y); -} - - -class QmlGraphicsPathViewAttached : public QObject -{ - Q_OBJECT - - Q_PROPERTY(bool onPath READ isOnPath NOTIFY onPathChanged) -public: - QmlGraphicsPathViewAttached(QObject *parent) - : QObject(parent), mo(new QmlOpenMetaObject(this)), onPath(false) - { - } - - ~QmlGraphicsPathViewAttached() - { - QmlGraphicsPathView::attachedProperties.remove(parent()); - } - - QVariant value(const QByteArray &name) const - { - return mo->value(name); - } - void setValue(const QByteArray &name, const QVariant &val) - { - mo->setValue(name, val); - } - - bool isOnPath() const { return onPath; } - void setOnPath(bool on) { - if (on != onPath) { - onPath = on; - emit onPathChanged(); - } - } - -Q_SIGNALS: - void onPathChanged(); - -private: - QmlOpenMetaObject *mo; - bool onPath; -}; - - -QmlGraphicsItem *QmlGraphicsPathViewPrivate::getItem(int modelIndex) -{ - Q_Q(QmlGraphicsPathView); - requestedIndex = modelIndex; - QmlGraphicsItem *item = model->item(modelIndex); - if (item) { - if (QObject *obj = QmlGraphicsPathView::qmlAttachedProperties(item)) - static_cast<QmlGraphicsPathViewAttached *>(obj)->setOnPath(true); - item->setParentItem(q); - } - requestedIndex = -1; - return item; -} - -void QmlGraphicsPathViewPrivate::releaseItem(QmlGraphicsItem *item) -{ - if (!item || !model) - return; - if (QObject *obj = QmlGraphicsPathView::qmlAttachedProperties(item)) - static_cast<QmlGraphicsPathViewAttached *>(obj)->setOnPath(false); - if (model->release(item) == 0) { - if (QObject *obj = QmlGraphicsPathView::qmlAttachedProperties(item)) - static_cast<QmlGraphicsPathViewAttached *>(obj)->setOnPath(false); - } -} - -/*! - \qmlclass PathView QmlGraphicsPathView - \since 4.7 - \brief The PathView element lays out model-provided items on a path. - \inherits Item - - The model is typically provided by a QAbstractListModel "C++ model object", but can also be created directly in QML. - - The items are laid out along a path defined by a \l Path and may be flicked to scroll. - - \snippet doc/src/snippets/declarative/pathview/pathview.qml 0 - - \image pathview.gif - - \sa Path -*/ - -QmlGraphicsPathView::QmlGraphicsPathView(QmlGraphicsItem *parent) - : QmlGraphicsItem(*(new QmlGraphicsPathViewPrivate), parent) -{ - Q_D(QmlGraphicsPathView); - d->init(); -} - -QmlGraphicsPathView::~QmlGraphicsPathView() -{ - Q_D(QmlGraphicsPathView); - if (d->ownModel) - delete d->model; -} - -/*! - \qmlattachedproperty bool PathView::onPath - This attached property holds whether the item is currently on the path. - - If a pathItemCount has been set, it is possible that some items may - be instantiated, but not considered to be currently on the path. - Usually, these items would be set invisible, for example: - - \code - Component { - Rectangle { - visible: PathView.onPath - ... - } - } - \endcode - - It is attached to each instance of the delegate. -*/ - -/*! - \qmlproperty model PathView::model - This property holds the model providing data for the view. - - The model provides a set of data that is used to create the items for the view. - For large or dynamic datasets the model is usually provided by a C++ model object. - Models can also be created directly in XML, using the ListModel element. - - \sa {qmlmodels}{Data Models} -*/ -QVariant QmlGraphicsPathView::model() const -{ - Q_D(const QmlGraphicsPathView); - return d->modelVariant; -} - -void QmlGraphicsPathView::setModel(const QVariant &model) -{ - Q_D(QmlGraphicsPathView); - if (d->model) { - disconnect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); - disconnect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); - disconnect(d->model, SIGNAL(createdItem(int, QmlGraphicsItem*)), this, SLOT(createdItem(int,QmlGraphicsItem*))); - for (int i=0; i<d->items.count(); i++){ - QmlGraphicsItem *p = d->items[i]; - d->model->release(p); - } - d->items.clear(); - } - - d->modelVariant = model; - QObject *object = qvariant_cast<QObject*>(model); - QmlGraphicsVisualModel *vim = 0; - if (object && (vim = qobject_cast<QmlGraphicsVisualModel *>(object))) { - if (d->ownModel) { - delete d->model; - d->ownModel = false; - } - d->model = vim; - } else { - if (!d->ownModel) { - d->model = new QmlGraphicsVisualDataModel(qmlContext(this)); - d->ownModel = true; - } - if (QmlGraphicsVisualDataModel *dataModel = qobject_cast<QmlGraphicsVisualDataModel*>(d->model)) - dataModel->setModel(model); - } - if (d->model) { - connect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); - connect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); - connect(d->model, SIGNAL(createdItem(int, QmlGraphicsItem*)), this, SLOT(createdItem(int,QmlGraphicsItem*))); - } - d->firstIndex = 0; - d->pathOffset = 0; - d->regenerate(); - d->fixOffset(); -} - -/*! - \qmlproperty int PathView::count - This property holds the number of items in the model. -*/ -int QmlGraphicsPathView::count() const -{ - Q_D(const QmlGraphicsPathView); - return d->model ? d->model->count() : 0; -} - -/*! - \qmlproperty Path PathView::path - \default - This property holds the path used to lay out the items. - For more information see the \l Path documentation. -*/ -QmlGraphicsPath *QmlGraphicsPathView::path() const -{ - Q_D(const QmlGraphicsPathView); - return d->path; -} - -void QmlGraphicsPathView::setPath(QmlGraphicsPath *path) -{ - Q_D(QmlGraphicsPathView); - d->path = path; - connect(d->path, SIGNAL(changed()), this, SLOT(refill())); - d->regenerate(); -} - -/*! - \qmlproperty int PathView::currentIndex - This property holds the index of the current item. -*/ -int QmlGraphicsPathView::currentIndex() const -{ - Q_D(const QmlGraphicsPathView); - return d->currentIndex; -} - -void QmlGraphicsPathView::setCurrentIndex(int idx) -{ - Q_D(QmlGraphicsPathView); - if (d->model && d->model->count()) - idx = qAbs(idx % d->model->count()); - if (d->model && idx != d->currentIndex) { - d->currentIndex = idx; - if (d->model->count()) { - d->snapToCurrent(); - int itemIndex = (idx - d->firstIndex + d->model->count()) % d->model->count(); - if (itemIndex < d->items.count()) - d->items.at(itemIndex)->setFocus(true); - } - emit currentIndexChanged(); - } -} - -/*! - \qmlproperty real PathView::offset - - The offset specifies how far along the path the items are from their initial positions. -*/ -qreal QmlGraphicsPathView::offset() const -{ - Q_D(const QmlGraphicsPathView); - return d->_offset; -} - -void QmlGraphicsPathView::setOffset(qreal offset) -{ - Q_D(QmlGraphicsPathView); - d->setOffset(offset); - d->updateCurrent(); -} - -void QmlGraphicsPathViewPrivate::setOffset(qreal o) -{ - Q_Q(QmlGraphicsPathView); - if (_offset != o) { - _offset = qmlMod(o, qreal(100.0)); - if (_offset < 0) - _offset = 100.0 + _offset; - q->refill(); - } -} - -/*! - \qmlproperty real PathView::snapPosition - - This property determines the position (0-100) the nearest item will snap to. -*/ -qreal QmlGraphicsPathView::snapPosition() const -{ - Q_D(const QmlGraphicsPathView); - return d->snapPos; -} - -void QmlGraphicsPathView::setSnapPosition(qreal pos) -{ - Q_D(QmlGraphicsPathView); - d->snapPos = pos/100; - d->fixOffset(); -} - -/*! - \qmlproperty real PathView::dragMargin - This property holds the maximum distance from the path that initiate mouse dragging. - - By default the path can only be dragged by clicking on an item. If - dragMargin is greater than zero, a drag can be initiated by clicking - within dragMargin pixels of the path. -*/ -qreal QmlGraphicsPathView::dragMargin() const -{ - Q_D(const QmlGraphicsPathView); - return d->dragMargin; -} - -void QmlGraphicsPathView::setDragMargin(qreal dragMargin) -{ - Q_D(QmlGraphicsPathView); - d->dragMargin = dragMargin; -} - -/*! - \qmlproperty component PathView::delegate - - The delegate provides a template defining each item instantiated by the view. - The index is exposed as an accessible \c index property. Properties of the - model are also available depending upon the type of \l {qmlmodels}{Data Model}. - - Note that the PathView will layout the items based on the size of the root - item in the delegate. - - Here is an example delegate: - \snippet doc/src/snippets/declarative/pathview/pathview.qml 1 -*/ -QmlComponent *QmlGraphicsPathView::delegate() const -{ - Q_D(const QmlGraphicsPathView); - if (d->model) { - if (QmlGraphicsVisualDataModel *dataModel = qobject_cast<QmlGraphicsVisualDataModel*>(d->model)) - return dataModel->delegate(); - } - - return 0; -} - -void QmlGraphicsPathView::setDelegate(QmlComponent *c) -{ - Q_D(QmlGraphicsPathView); - if (!d->ownModel) { - d->model = new QmlGraphicsVisualDataModel(qmlContext(this)); - d->ownModel = true; - } - if (QmlGraphicsVisualDataModel *dataModel = qobject_cast<QmlGraphicsVisualDataModel*>(d->model)) { - dataModel->setDelegate(c); - d->regenerate(); - } -} - -/*! - \qmlproperty int PathView::pathItemCount - This property holds the number of items visible on the path at any one time -*/ -int QmlGraphicsPathView::pathItemCount() const -{ - Q_D(const QmlGraphicsPathView); - return d->pathItems; -} - -void QmlGraphicsPathView::setPathItemCount(int i) -{ - Q_D(QmlGraphicsPathView); - if (i == d->pathItems) - return; - d->pathItems = i; - d->regenerate(); -} - -QPointF QmlGraphicsPathViewPrivate::pointNear(const QPointF &point, qreal *nearPercent) const -{ - //XXX maybe do recursively at increasing resolution. - qreal mindist = 1e10; // big number - QPointF nearPoint = path->pointAt(0); - qreal nearPc = 0; - for (qreal i=1; i < 1000; i++) { - QPointF pt = path->pointAt(i/1000.0); - QPointF diff = pt - point; - qreal dist = diff.x()*diff.x() + diff.y()*diff.y(); - if (dist < mindist) { - nearPoint = pt; - nearPc = i; - mindist = dist; - } - } - - if (nearPercent) - *nearPercent = nearPc / 10.0; - - return nearPoint; -} - - -void QmlGraphicsPathView::mousePressEvent(QGraphicsSceneMouseEvent *event) -{ - Q_D(QmlGraphicsPathView); - if (!d->items.count()) - return; - QPointF scenePoint = mapToScene(event->pos()); - int idx = 0; - for (; idx < d->items.count(); ++idx) { - QRectF rect = d->items.at(idx)->boundingRect(); - rect = d->items.at(idx)->mapToScene(rect).boundingRect(); - if (rect.contains(scenePoint)) - break; - } - if (idx == d->items.count() && d->dragMargin == 0.) // didn't click on an item - return; - - d->startPoint = d->pointNear(event->pos(), &d->startPc); - if (idx == d->items.count()) { - qreal distance = qAbs(event->pos().x() - d->startPoint.x()) + qAbs(event->pos().y() - d->startPoint.y()); - if (distance > d->dragMargin) - return; - } - - d->stealMouse = false; - d->lastElapsed = 0; - d->lastDist = 0; - QmlGraphicsItemPrivate::start(d->lastPosTime); - d->tl.clear(); -} - -void QmlGraphicsPathView::mouseMoveEvent(QGraphicsSceneMouseEvent *event) -{ - Q_D(QmlGraphicsPathView); - if (d->lastPosTime.isNull()) - return; - - if (!d->stealMouse) { - QPointF delta = event->pos() - d->startPoint; - if (qAbs(delta.x()) > QApplication::startDragDistance() && qAbs(delta.y()) > QApplication::startDragDistance()) - d->stealMouse = true; - } - - if (d->stealMouse) { - d->moveReason = QmlGraphicsPathViewPrivate::Mouse; - qreal newPc; - d->pointNear(event->pos(), &newPc); - qreal diff = newPc - d->startPc; - if (diff) { - setOffset(d->_offset + diff); - - if (diff > 50) - diff -= 100; - else if (diff < -50) - diff += 100; - - d->lastElapsed = QmlGraphicsItemPrivate::restart(d->lastPosTime); - d->lastDist = diff; - d->startPc = newPc; - } - } -} - -void QmlGraphicsPathView::mouseReleaseEvent(QGraphicsSceneMouseEvent *) -{ - Q_D(QmlGraphicsPathView); - if (d->lastPosTime.isNull()) - return; - - qreal elapsed = qreal(d->lastElapsed + QmlGraphicsItemPrivate::elapsed(d->lastPosTime)) / 1000.; - qreal velocity = elapsed > 0. ? d->lastDist / elapsed : 0; - if (d->model && d->model->count() && qAbs(velocity) > 5) { - if (velocity > 100) - velocity = 100; - else if (velocity < -100) - velocity = -100; - qreal inc = qmlMod(d->_offset - d->snapPos, qreal(100.0 / d->model->count())); - qreal dist = qAbs(velocity/2 - qmlMod(velocity/2, qreal(100.0 / d->model->count()) - inc)); - d->moveOffset.setValue(d->_offset); - d->tl.accel(d->moveOffset, velocity, 10, dist); - d->tl.callback(QmlTimeLineCallback(&d->moveOffset, d->fixOffsetCallback, d)); - } else { - d->fixOffset(); - } - - d->lastPosTime = QTime(); - d->stealMouse = false; - ungrabMouse(); -} - -bool QmlGraphicsPathView::sendMouseEvent(QGraphicsSceneMouseEvent *event) -{ - Q_D(QmlGraphicsPathView); - QGraphicsSceneMouseEvent mouseEvent(event->type()); - QRectF myRect = mapToScene(QRectF(0, 0, width(), height())).boundingRect(); - QGraphicsScene *s = scene(); - QmlGraphicsItem *grabber = s ? qobject_cast<QmlGraphicsItem*>(s->mouseGrabberItem()) : 0; - if ((d->stealMouse || myRect.contains(event->scenePos().toPoint())) && (!grabber || !grabber->keepMouseGrab())) { - mouseEvent.setAccepted(false); - for (int i = 0x1; i <= 0x10; i <<= 1) { - if (event->buttons() & i) { - Qt::MouseButton button = Qt::MouseButton(i); - mouseEvent.setButtonDownPos(button, mapFromScene(event->buttonDownPos(button))); - } - } - mouseEvent.setScenePos(event->scenePos()); - mouseEvent.setLastScenePos(event->lastScenePos()); - mouseEvent.setPos(mapFromScene(event->scenePos())); - mouseEvent.setLastPos(mapFromScene(event->lastScenePos())); - - switch(mouseEvent.type()) { - case QEvent::GraphicsSceneMouseMove: - mouseMoveEvent(&mouseEvent); - break; - case QEvent::GraphicsSceneMousePress: - mousePressEvent(&mouseEvent); - break; - case QEvent::GraphicsSceneMouseRelease: - mouseReleaseEvent(&mouseEvent); - break; - default: - break; - } - grabber = qobject_cast<QmlGraphicsItem*>(s->mouseGrabberItem()); - if (grabber && d->stealMouse && !grabber->keepMouseGrab() && grabber != this) - grabMouse(); - - return d->stealMouse; - } else if (!d->lastPosTime.isNull()) { - d->lastPosTime = QTime(); - } - return false; -} - -bool QmlGraphicsPathView::sceneEventFilter(QGraphicsItem *i, QEvent *e) -{ - if (!isVisible()) - return QmlGraphicsItem::sceneEventFilter(i, e); - - switch (e->type()) { - case QEvent::GraphicsSceneMousePress: - case QEvent::GraphicsSceneMouseMove: - case QEvent::GraphicsSceneMouseRelease: - { - bool ret = sendMouseEvent(static_cast<QGraphicsSceneMouseEvent *>(e)); - if (e->type() == QEvent::GraphicsSceneMouseRelease) - return ret; - break; - } - default: - break; - } - - return QmlGraphicsItem::sceneEventFilter(i, e); -} - -void QmlGraphicsPathView::componentComplete() -{ - Q_D(QmlGraphicsPathView); - QmlGraphicsItem::componentComplete(); - d->regenerate(); - - // move to correct offset - if (d->items.count()) { - int itemIndex = (d->currentIndex - d->firstIndex + d->model->count()) % d->model->count(); - - itemIndex += d->pathOffset; - itemIndex %= d->items.count(); - qreal targetOffset = qmlMod(100 + (d->snapPos*100) - 100.0 * itemIndex / d->items.count(), qreal(100.0)); - - if (targetOffset < 0) - targetOffset = 100.0 + targetOffset; - if (targetOffset != d->_offset) { - d->moveOffset.setValue(targetOffset); - } - } -} - -void QmlGraphicsPathViewPrivate::regenerate() -{ - Q_Q(QmlGraphicsPathView); - if (!q->isComponentComplete()) - return; - - for (int i=0; i<items.count(); i++){ - QmlGraphicsItem *p = items[i]; - releaseItem(p); - } - items.clear(); - - if (!isValid()) - return; - - if (firstIndex >= model->count()) - firstIndex = model->count()-1; - if (pathOffset >= model->count()) - pathOffset = model->count()-1; - - int numItems = pathItems >= 0 ? pathItems : model->count(); - for (int i=0; i < numItems && i < model->count(); ++i){ - int index = (i + firstIndex) % model->count(); - QmlGraphicsItem *item = getItem(index); - if (!item) { - qWarning() << "PathView: Cannot create item, index" << (i + firstIndex) % model->count(); - return; - } - items.append(item); - item->setZValue(i); - if (currentIndex == index) - item->setFocus(true); - } - q->refill(); -} - -void QmlGraphicsPathViewPrivate::updateItem(QmlGraphicsItem *item, qreal percent) -{ - if (QObject *obj = QmlGraphicsPathView::qmlAttachedProperties(item)) { - foreach(const QString &attr, path->attributes()) - static_cast<QmlGraphicsPathViewAttached *>(obj)->setValue(attr.toUtf8(), path->attributeAt(attr, percent)); - } - QPointF pf = path->pointAt(percent); - item->setX(pf.x() - item->width()*item->scale()/2); - item->setY(pf.y() - item->height()*item->scale()/2); -} - -void QmlGraphicsPathView::refill() -{ - Q_D(QmlGraphicsPathView); - if (!d->isValid() || !isComponentComplete()) - return; - - QList<qreal> positions; - for (int i=0; i<d->items.count(); i++){ - qreal percent = i * (100. / d->items.count()); - percent = percent + d->_offset; - percent = qmlMod(percent, qreal(100.0)); - positions << qAbs(percent/100.0); - } - - if (d->pathItems==-1) { - for (int i=0; i<positions.count(); i++) - d->updateItem(d->items.at(i), positions[i]); - return; - } - - QList<qreal> rotatedPositions; - for (int i=0; i<d->items.count(); i++) - rotatedPositions << positions[(i + d->pathOffset + d->items.count()) % d->items.count()]; - - int wrapIndex= -1; - for (int i=0; i<d->items.count()-1; i++) { - if (rotatedPositions[i] > rotatedPositions[i+1]){ - wrapIndex = i; - break; - } - } - if (wrapIndex != -1 ){ - //A wraparound has occured - if (wrapIndex < d->items.count()/2){ - while(wrapIndex-- >= 0){ - QmlGraphicsItem* p = d->items.takeFirst(); - d->updateItem(p, 0.0); - d->releaseItem(p); - d->firstIndex++; - d->firstIndex %= d->model->count(); - int index = (d->firstIndex + d->items.count())%d->model->count(); - QmlGraphicsItem *item = d->getItem(index); - item->setZValue(wrapIndex); - if (d->currentIndex == index) - item->setFocus(true); - d->items << item; - d->pathOffset++; - d->pathOffset=d->pathOffset % d->items.count(); - } - } else { - while(wrapIndex++ < d->items.count()-1){ - QmlGraphicsItem* p = d->items.takeLast(); - d->updateItem(p, 1.0); - d->releaseItem(p); - d->firstIndex--; - if (d->firstIndex < 0) - d->firstIndex = d->model->count() - 1; - QmlGraphicsItem *item = d->getItem(d->firstIndex); - item->setZValue(d->firstIndex); - if (d->currentIndex == d->firstIndex) - item->setFocus(true); - d->items.prepend(item); - d->pathOffset--; - if (d->pathOffset < 0) - d->pathOffset = d->items.count() - 1; - } - } - for (int i=0; i<d->items.count(); i++) - rotatedPositions[i] = positions[(i + d->pathOffset + d->items.count()) - % d->items.count()]; - } - for (int i=0; i<d->items.count(); i++) - d->updateItem(d->items.at(i), rotatedPositions[i]); -} - -void QmlGraphicsPathView::itemsInserted(int modelIndex, int count) -{ - //XXX support animated insertion - Q_D(QmlGraphicsPathView); - if (!d->isValid() || !isComponentComplete()) - return; - if (d->pathItems == -1) { - for (int i = 0; i < count; ++i) { - QmlGraphicsItem *item = d->getItem(modelIndex + i); - item->setZValue(modelIndex + i); - d->items.insert(modelIndex + i, item); - } - refill(); - } else { - //XXX This is pretty heavy handed until we reference count items. - d->regenerate(); - } - - // make sure the current item is still at the snap position - int itemIndex = (d->currentIndex - d->firstIndex + d->model->count())%d->model->count(); - itemIndex += d->pathOffset; - itemIndex %= d->items.count(); - qreal targetOffset = qmlMod(100 + (d->snapPos*100) - 100.0 * itemIndex / d->items.count(), qreal(100.0)); - - if (targetOffset < 0) - targetOffset = 100.0 + targetOffset; - if (targetOffset != d->_offset) - d->moveOffset.setValue(targetOffset); -} - -void QmlGraphicsPathView::itemsRemoved(int modelIndex, int count) -{ - //XXX support animated removal - Q_D(QmlGraphicsPathView); - if (!d->isValid() || !isComponentComplete()) - return; - if (d->pathItems == -1) { - for (int i = 0; i < count; ++i) { - QmlGraphicsItem* p = d->items.takeAt(modelIndex); - d->model->release(p); - } - d->snapToCurrent(); - refill(); - } else { - d->regenerate(); - } - - if (d->model->count() == 0) { - d->currentIndex = -1; - d->moveOffset.setValue(0); - return; - } - - // make sure the current item is still at the snap position - if (d->currentIndex >= d->model->count()) - d->currentIndex = d->model->count() - 1; - int itemIndex = (d->currentIndex - d->firstIndex + d->model->count())%d->model->count(); - itemIndex += d->pathOffset; - itemIndex %= d->items.count(); - qreal targetOffset = qmlMod(100 + (d->snapPos*100) - 100.0 * itemIndex / d->items.count(), qreal(100.0)); - - if (targetOffset < 0) - targetOffset = 100.0 + targetOffset; - if (targetOffset != d->_offset) - d->moveOffset.setValue(targetOffset); -} - -void QmlGraphicsPathView::createdItem(int index, QmlGraphicsItem *item) -{ - Q_D(QmlGraphicsPathView); - if (d->requestedIndex != index) { - item->setParentItem(this); - d->updateItem(item, index < d->firstIndex ? 0.0 : 1.0); - } -} - -void QmlGraphicsPathView::destroyingItem(QmlGraphicsItem *item) -{ - Q_UNUSED(item); -} - -void QmlGraphicsPathView::ticked() -{ - Q_D(QmlGraphicsPathView); - d->updateCurrent(); -} - -// find the item closest to the snap position -int QmlGraphicsPathViewPrivate::calcCurrentIndex() -{ - int current = -1; - if (model && items.count()) { - _offset = qmlMod(_offset, qreal(100.0)); - if (_offset < 0) - _offset += 100.0; - - if (pathItems == -1) { - qreal delta = qmlMod(_offset - snapPos, qreal(100.0)); - if (delta < 0) - delta = 100.0 + delta; - int ii = model->count() - qRound(delta * model->count() / 100); - if (ii < 0) - ii = 0; - current = ii; - } else { - qreal bestDiff=1e9; - int bestI=-1; - for (int i=0; i<items.count(); i++){ - qreal percent = i * (100. / items.count()); - percent = percent + _offset; - percent = qmlMod(percent, qreal(100.0)); - qreal diff = qAbs(snapPos - (percent/100.0)); - if (diff < bestDiff){ - bestDiff = diff; - bestI = i; - } - } - int modelIndex = (bestI - pathOffset + items.count())%items.count(); - modelIndex += firstIndex; - current = modelIndex; - } - current = qAbs(current % model->count()); - } - - return current; -} - -void QmlGraphicsPathViewPrivate::updateCurrent() -{ - Q_Q(QmlGraphicsPathView); - if (moveReason != Mouse) - return; - int idx = calcCurrentIndex(); - if (model && idx != currentIndex) { - currentIndex = idx; - int itemIndex = (idx - firstIndex + model->count()) % model->count(); - if (itemIndex < items.count()) - items.at(itemIndex)->setFocus(true); - emit q->currentIndexChanged(); - } -} - -void QmlGraphicsPathViewPrivate::fixOffsetCallback(void *d) -{ - ((QmlGraphicsPathViewPrivate *)d)->fixOffset(); -} - -void QmlGraphicsPathViewPrivate::fixOffset() -{ - Q_Q(QmlGraphicsPathView); - if (model && items.count()) { - int curr = calcCurrentIndex(); - if (curr != currentIndex) - q->setCurrentIndex(curr); - else - snapToCurrent(); - } -} - -void QmlGraphicsPathViewPrivate::snapToCurrent() -{ - if (!model || model->count() <= 0) - return; - - int itemIndex = (currentIndex - firstIndex + model->count()) % model->count(); - - //Rounds is the number of times round to make the current item visible - int rounds = itemIndex / items.count(); - int otherWayRounds = (model->count() - (itemIndex)) / items.count(); - if (otherWayRounds < rounds) - rounds = -otherWayRounds; - - itemIndex += pathOffset; - if(model->count() % items.count() && itemIndex - model->count() + items.count() > 0){ - //When model.count() is not a multiple of pathItemCount we need to manually - //fix the index so that going backwards one step works correctly. - itemIndex = itemIndex - model->count() + items.count(); - } - itemIndex %= items.count(); - qreal targetOffset = qmlMod(100 + (snapPos*100) - 100.0 * itemIndex / items.count(), qreal(100.0)); - - if (targetOffset < 0) - targetOffset = 100.0 + targetOffset; - if (targetOffset == _offset && rounds == 0) - return; - - moveReason = Other; - tl.clear(); - moveOffset.setValue(_offset); - - if (rounds!=0){ - //Compensate if the targetOffset would bring the target in from off the screen - qreal distance = targetOffset - _offset; - if (distance <= -50) - rounds--; - if (distance > 50) - rounds++; - tl.move(moveOffset, targetOffset + 100.0*(-rounds), QEasingCurve(QEasingCurve::InOutQuad), - int(100*items.count()*qMax((qreal)(2.0/items.count()),(qreal)qAbs(rounds)))); - tl.callback(QmlTimeLineCallback(&moveOffset, fixOffsetCallback, this)); - return; - } - - if (targetOffset - _offset > 50.0) { - qreal distance = 100 - targetOffset + _offset; - tl.move(moveOffset, 0.0, QEasingCurve(QEasingCurve::OutQuad), int(200 * _offset / distance)); - tl.set(moveOffset, 100.0); - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InQuad), int(200 * (100-targetOffset) / distance)); - } else if (targetOffset - _offset <= -50.0) { - qreal distance = 100 - _offset + targetOffset; - tl.move(moveOffset, 100.0, QEasingCurve(QEasingCurve::OutQuad), int(200 * (100-_offset) / distance)); - tl.set(moveOffset, 0.0); - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InQuad), int(200 * targetOffset / distance)); - } else { - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InOutQuad), 200); - } -} - -QHash<QObject*, QObject*> QmlGraphicsPathView::attachedProperties; -QObject *QmlGraphicsPathView::qmlAttachedProperties(QObject *obj) -{ - QObject *rv = attachedProperties.value(obj); - if (!rv) { - rv = new QmlGraphicsPathViewAttached(obj); - attachedProperties.insert(obj, rv); - } - return rv; -} - -QT_END_NAMESPACE - -#include <qmlgraphicspathview.moc> |