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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "splinechartitem_p.h"
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#include "qsplineseries_p.h"
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#include "chartpresenter_p.h"
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#include "splineanimation_p.h"
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#include <QPainter>
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#include <QGraphicsSceneMouseEvent>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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SplineChartItem::SplineChartItem(QSplineSeries *series, ChartPresenter *presenter)
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: XYChart(series, presenter),
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QGraphicsItem(presenter ? presenter->rootItem() : 0),
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m_series(series),
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m_pointsVisible(false),
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m_animation(0)
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{
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setAcceptHoverEvents(true);
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setZValue(ChartPresenter::SplineChartZValue);
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QObject::connect(m_series->d_func(), SIGNAL(updated()), this, SLOT(handleUpdated()));
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QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated()));
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QObject::connect(series, SIGNAL(opacityChanged()), this, SLOT(handleUpdated()));
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handleUpdated();
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}
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QRectF SplineChartItem::boundingRect() const
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{
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return m_rect;
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}
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QPainterPath SplineChartItem::shape() const
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{
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QPainterPathStroker stroker;
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return stroker.createStroke(m_path);
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}
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void SplineChartItem::setAnimation(SplineAnimation *animation)
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{
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m_animation = animation;
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XYChart::setAnimation(animation);
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}
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ChartAnimation *SplineChartItem::animation() const
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{
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return m_animation;
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}
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void SplineChartItem::setControlGeometryPoints(QVector<QPointF>& points)
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{
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m_controlPoints = points;
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}
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QVector<QPointF> SplineChartItem::controlGeometryPoints() const
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{
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return m_controlPoints;
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}
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void SplineChartItem::updateChart(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, int index)
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{
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QVector<QPointF> controlPoints;
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if (newPoints.count() >= 2)
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controlPoints.resize(newPoints.count() * 2 - 2);
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for (int i = 0; i < newPoints.size() - 1; i++) {
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controlPoints[2 * i] = calculateGeometryControlPoint(2 * i);
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controlPoints[2 * i + 1] = calculateGeometryControlPoint(2 * i + 1);
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}
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if (m_animation)
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m_animation->setup(oldPoints, newPoints, m_controlPoints, controlPoints, index);
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m_points = newPoints;
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m_controlPoints = controlPoints;
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setDirty(false);
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if (m_animation)
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presenter()->startAnimation(m_animation);
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else
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updateGeometry();
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}
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QPointF SplineChartItem::calculateGeometryControlPoint(int index) const
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{
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return XYChart::calculateGeometryPoint(m_series->d_func()->controlPoint(index));
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}
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void SplineChartItem::updateGeometry()
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{
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const QVector<QPointF> &points = m_points;
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const QVector<QPointF> &controlPoints = m_controlPoints;
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if ((points.size() < 2) || (controlPoints.size() < 2)) {
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prepareGeometryChange();
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m_path = QPainterPath();
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m_rect = QRect();
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return;
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}
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Q_ASSERT(points.count() * 2 - 2 == controlPoints.count());
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QPainterPath splinePath(points.at(0));
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for (int i = 0; i < points.size() - 1; i++) {
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const QPointF &point = points.at(i + 1);
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splinePath.cubicTo(controlPoints[2 * i], controlPoints[2 * i + 1], point);
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}
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prepareGeometryChange();
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// QPainterPathStroker stroker;
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// stroker.setWidth(m_linePen.width() / 2.0);
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// m_path = stroker.createStroke(splinePath);
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m_path = splinePath;
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m_rect = splinePath.boundingRect();
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setPos(origin());
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}
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//handlers
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void SplineChartItem::handleUpdated()
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{
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setVisible(m_series->isVisible());
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setOpacity(m_series->opacity());
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m_pointsVisible = m_series->pointsVisible();
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m_linePen = m_series->pen();
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m_pointPen = m_series->pen();
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m_pointPen.setWidthF(2 * m_pointPen.width());
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update();
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}
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//painter
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void SplineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(widget)
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Q_UNUSED(option)
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painter->save();
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painter->setPen(m_linePen);
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// painter->setBrush(m_linePen.color());
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painter->setClipRect(clipRect());
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painter->drawPath(m_path);
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if (m_pointsVisible) {
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painter->setPen(m_pointPen);
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painter->drawPoints(geometryPoints());
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}
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painter->restore();
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}
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void SplineChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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emit XYChart::clicked(calculateDomainPoint(event->pos()));
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QGraphicsItem::mousePressEvent(event);
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}
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void SplineChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
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{
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emit XYChart::hovered(calculateDomainPoint(event->pos()), true);
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event->accept();
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}
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void SplineChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
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{
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emit XYChart::hovered(calculateDomainPoint(event->pos()), false);
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event->accept();
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}
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#include "moc_splinechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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