diff options
Diffstat (limited to 'src/quick/util/qquickpath.cpp')
| -rw-r--r-- | src/quick/util/qquickpath.cpp | 176 |
1 files changed, 168 insertions, 8 deletions
diff --git a/src/quick/util/qquickpath.cpp b/src/quick/util/qquickpath.cpp index 16723b997e..840a8c6a2c 100644 --- a/src/quick/util/qquickpath.cpp +++ b/src/quick/util/qquickpath.cpp @@ -60,7 +60,7 @@ QT_BEGIN_NAMESPACE This type is the base for all path types. It cannot be instantiated. - \sa Path, PathAttribute, PathPercent, PathLine, PathQuad, PathCubic, PathArc, + \sa Path, PathAttribute, PathPercent, PathLine, PathPolyline, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg */ @@ -71,7 +71,7 @@ QT_BEGIN_NAMESPACE \ingroup qtquick-animation-paths \brief Defines a path for use by \l PathView and \l Shape. - A Path is composed of one or more path segments - PathLine, PathQuad, + A Path is composed of one or more path segments - PathLine, PathPolyline, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg. The spacing of the items along the Path can be adjusted via a @@ -104,6 +104,12 @@ QT_BEGIN_NAMESPACE \li Yes \li Yes \row + \li PathPolyline + \li Yes + \li Yes + \li Yes + \li Yes + \row \li PathQuad \li Yes \li Yes @@ -156,7 +162,7 @@ QT_BEGIN_NAMESPACE \note Path is a non-visual type; it does not display anything on its own. To draw a path, use \l Shape. - \sa PathView, Shape, PathAttribute, PathPercent, PathLine, PathMove, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg + \sa PathView, Shape, PathAttribute, PathPercent, PathLine, PathPolyline, PathMove, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg */ QQuickPath::QQuickPath(QObject *parent) : QObject(*(new QQuickPathPrivate), parent) @@ -240,6 +246,7 @@ bool QQuickPath::isClosed() const A path can contain the following path objects: \list \li \l PathLine - a straight line to a given position. + \li \l PathPolyline - a polyline specified as a list of normalized coordinates. \li \l PathQuad - a quadratic Bezier curve to a given position with a control point. \li \l PathCubic - a cubic Bezier curve to a given position with two control points. \li \l PathArc - an arc to a given position with a radius. @@ -407,6 +414,19 @@ void QQuickPath::processPath() emit changed(); } +inline static void scalePath(QPainterPath &path, const QSizeF &scale) +{ + const qreal xscale = scale.width(); + const qreal yscale = scale.height(); + if (xscale == 1 && yscale == 1) + return; + + for (int i = 0; i < path.elementCount(); ++i) { + const QPainterPath::Element &element = path.elementAt(i); + path.setElementPositionAt(i, element.x * xscale, element.y * yscale); + } +} + QPainterPath QQuickPath::createPath(const QPointF &startPoint, const QPointF &endPoint, const QStringList &attributes, qreal &pathLength, QList<AttributePoint> &attributePoints, bool *closed) { Q_D(QQuickPath); @@ -465,7 +485,7 @@ QPainterPath QQuickPath::createPath(const QPointF &startPoint, const QPointF &en d->_attributePoints.last().values[percentString] = 1; interpolate(d->_attributePoints.count() - 1, percentString, 1); } - + scalePath(path, d->scale); // Adjust percent qreal length = path.length(); @@ -491,7 +511,7 @@ QPainterPath QQuickPath::createPath(const QPointF &startPoint, const QPointF &en if (closed) { QPointF end = path.currentPosition(); - *closed = length > 0 && startX == end.x() && startY == end.y(); + *closed = length > 0 && startX * d->scale.width() == end.x() && startY * d->scale.height() == end.y(); } pathLength = length; @@ -525,6 +545,7 @@ QPainterPath QQuickPath::createShapePath(const QPointF &startPoint, const QPoint QPointF end = path.currentPosition(); *closed = startX == end.x() && startY == end.y(); } + scalePath(path, d->scale); // Note: Length of paths inside ShapePath is not used, so currently // length is always 0. This avoids potentially heavy path.length() @@ -723,6 +744,33 @@ void QQuickPath::invalidateSequentialHistory() const d->prevBez.isValid = false; } +/*! + \qmlproperty size QtQuick::Path::scale + + This property holds the scale factor for the path. + The width and height of \a scale can be different, to + achieve anisotropic scaling. + + \note Setting this property will not affect the border width. + + \since QtQuick 2.14 +*/ +QSizeF QQuickPath::scale() const +{ + Q_D(const QQuickPath); + return d->scale; +} + +void QQuickPath::setScale(const QSizeF &scale) +{ + Q_D(QQuickPath); + if (scale == d->scale) + return; + d->scale = scale; + emit scaleChanged(); + processPath(); +} + QPointF QQuickPath::sequentialPointAt(qreal p, qreal *angle) const { Q_D(const QQuickPath); @@ -852,9 +900,28 @@ QPointF QQuickPath::backwardsPointAt(const QPainterPath &path, const qreal &path return QPointF(0,0); } -QPointF QQuickPath::pointAt(qreal p) const +/*! + \qmlmethod point Path::pointAtPercent(real t) + + Returns the point at the percentage \a t of the current path. + The argument \a t has to be between 0 and 1. + + \note Similarly to other percent methods in \l QPainterPath, + the percentage measurement is not linear with regards to the length, + if curves are present in the path. + When curves are present, the percentage argument is mapped to the \c t + parameter of the Bezier equations. + + \sa QPainterPath::pointAt + + \since QtQuick 2.14 +*/ +QPointF QQuickPath::pointAtPercent(qreal t) const { Q_D(const QQuickPath); + if (d->isShapePath) // this since ShapePath does not calculate the length at all, + return d->_path.pointAtPercent(t); // in order to be faster. + if (d->_pointCache.isEmpty()) { createPointCache(); if (d->_pointCache.isEmpty()) @@ -862,7 +929,7 @@ QPointF QQuickPath::pointAt(qreal p) const } const int segmentCount = d->_pointCache.size() - 1; - qreal idxf = p*segmentCount; + qreal idxf = t*segmentCount; int idx1 = qFloor(idxf); qreal delta = idxf - idx1; if (idx1 > segmentCount) @@ -1127,7 +1194,7 @@ void QQuickPathAttribute::setValue(qreal value) } \endqml - \sa Path, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg, PathMove + \sa Path, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg, PathMove, PathPolyline */ /*! @@ -2286,6 +2353,99 @@ void QQuickPathPercent::setValue(qreal value) emit changed(); } } + +/*! + \qmltype PathPolyline + \instantiates QQuickPathPolyline + \inqmlmodule QtQuick + \ingroup qtquick-animation-paths + \brief Defines a polyline through a list of coordinates. + \since QtQuick 2.14 + + The example below creates a triangular path consisting of four vertices + on the edge of the containing Shape's bounding box. + Through the containing shape's \l scale property, the path will be + rescaled together with its containing shape. + + \qml + PathPolyline { + id: ppl + path: [ Qt.point(0.0, 0.0), + Qt.point(1.0, 0.0), + Qt.point(0.5, 1.0), + Qt.point(0.0, 0.0) + ] + } + \endqml + + \sa Path, PathQuad, PathCubic, PathArc, PathAngleArc, PathCurve, PathSvg, PathMove, PathPolyline +*/ + +/*! + \qmlproperty point QtQuick::PathPolyline::start + + This read-only property contains the beginning of the polyline. +*/ + +/*! + \qmlproperty list<point> QtQuick::PathPolyline::path + + This property defines the vertices of the polyline. +*/ + +QQuickPathPolyline::QQuickPathPolyline(QObject *parent) : QQuickCurve(parent) +{ +} + +QVariantList QQuickPathPolyline::path() const +{ + QVariantList res; + for (int i = 0; i < m_path.length(); ++i) { + const QPointF &c = m_path.at(i); + res.append(QVariant::fromValue(c)); + } + + return res; +} + +void QQuickPathPolyline::setPath(const QVariantList &path) +{ + QVector<QPointF> pathList; + for (int i = 0; i < path.length(); ++i) { + const QPointF c = path.at(i).toPointF(); + pathList.append(c); + } + + if (m_path != pathList) { + const QPointF &oldStart = start(); + m_path = pathList; + const QPointF &newStart = start(); + emit pathChanged(); + if (oldStart != newStart) + emit startChanged(); + emit changed(); + } +} + +QPointF QQuickPathPolyline::start() const +{ + if (m_path.size()) { + const QPointF &p = m_path.first(); + return p; + } + return QPointF(); +} + +void QQuickPathPolyline::addToPath(QPainterPath &path, const QQuickPathData &/*data*/) +{ + if (m_path.size() < 2) + return; + + path.moveTo(m_path.first()); + for (int i = 1; i < m_path.size(); ++i) + path.lineTo(m_path.at(i)); +} + QT_END_NAMESPACE #include "moc_qquickpath_p.cpp" |