diff options
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativeflickable.cpp')
-rw-r--r-- | src/declarative/graphicsitems/qdeclarativeflickable.cpp | 69 |
1 files changed, 64 insertions, 5 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativeflickable.cpp b/src/declarative/graphicsitems/qdeclarativeflickable.cpp index d35718b..0faa296 100644 --- a/src/declarative/graphicsitems/qdeclarativeflickable.cpp +++ b/src/declarative/graphicsitems/qdeclarativeflickable.cpp @@ -53,6 +53,10 @@ QT_BEGIN_NAMESPACE // before we perform a flick. static const int FlickThreshold = 20; +// RetainGrabVelocity is the maxmimum instantaneous velocity that +// will ensure the Flickable retains the grab on consecutive flicks. +static const int RetainGrabVelocity = 15; + QDeclarativeFlickableVisibleArea::QDeclarativeFlickableVisibleArea(QDeclarativeFlickable *parent) : QObject(parent), flickable(parent), m_xPosition(0.), m_widthRatio(0.) , m_yPosition(0.), m_heightRatio(0.) @@ -373,9 +377,9 @@ void QDeclarativeFlickablePrivate::updateBeginningEnd() \section1 Example Usage - \beginfloatright + \div {float-right} \inlineimage flickable.gif - \endfloat + \enddiv The following example shows a small view onto a large image in which the user can drag or flick the image in order to view different parts of it. @@ -672,7 +676,8 @@ void QDeclarativeFlickable::setFlickableDirection(FlickableDirection direction) void QDeclarativeFlickablePrivate::handleMousePressEvent(QGraphicsSceneMouseEvent *event) { Q_Q(QDeclarativeFlickable); - if (interactive && timeline.isActive() && (qAbs(hData.velocity) > 10 || qAbs(vData.velocity) > 10)) + if (interactive && timeline.isActive() + && (qAbs(hData.smoothVelocity.value()) > RetainGrabVelocity || qAbs(vData.smoothVelocity.value()) > RetainGrabVelocity)) stealMouse = true; // If we've been flicked then steal the click. else stealMouse = false; @@ -876,7 +881,7 @@ void QDeclarativeFlickable::wheelEvent(QGraphicsSceneWheelEvent *event) Q_D(QDeclarativeFlickable); if (!d->interactive) { QDeclarativeItem::wheelEvent(event); - } else if (yflick()) { + } else if (yflick() && event->orientation() == Qt::Vertical) { if (event->delta() > 0) d->vData.velocity = qMax(event->delta() - d->vData.smoothVelocity.value(), qreal(250.0)); else @@ -888,7 +893,7 @@ void QDeclarativeFlickable::wheelEvent(QGraphicsSceneWheelEvent *event) movementStarting(); } event->accept(); - } else if (xflick()) { + } else if (xflick() && event->orientation() == Qt::Horizontal) { if (event->delta() > 0) d->hData.velocity = qMax(event->delta() - d->hData.smoothVelocity.value(), qreal(250.0)); else @@ -1250,6 +1255,60 @@ void QDeclarativeFlickable::setContentHeight(qreal h) d->updateBeginningEnd(); } +/*! + \qmlmethod Flickable::resizeContent(real width, real height, QPointF center) + \preliminary + + Resizes the content to \a width x \a height about \a center. + + \bold {This method was added in QtQuick 1.1.} + + This does not scale the contents of the Flickable - it only resizes the \l contentWidth + and \l contentHeight. + + Resizing the content may result in the content being positioned outside + the bounds of the Flickable. Calling \l returnToBounds() will + move the content back within legal bounds. +*/ +void QDeclarativeFlickable::resizeContent(qreal w, qreal h, QPointF center) +{ + Q_D(QDeclarativeFlickable); + if (w != d->hData.viewSize) { + qreal oldSize = d->hData.viewSize; + setContentWidth(w); + if (center.x() != 0) { + qreal pos = center.x() * w / oldSize; + setContentX(contentX() + pos - center.x()); + } + } + if (h != d->vData.viewSize) { + qreal oldSize = d->vData.viewSize; + setContentHeight(h); + if (center.y() != 0) { + qreal pos = center.y() * h / oldSize; + setContentY(contentY() + pos - center.y()); + } + } +} + +/*! + \qmlmethod Flickable::returnToBounds() + \preliminary + + Ensures the content is within legal bounds. + + \bold {This method was added in QtQuick 1.1.} + + This may be called to ensure that the content is within legal bounds + after manually positioning the content. +*/ +void QDeclarativeFlickable::returnToBounds() +{ + Q_D(QDeclarativeFlickable); + d->fixupX(); + d->fixupY(); +} + qreal QDeclarativeFlickable::vWidth() const { Q_D(const QDeclarativeFlickable); |