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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 "chartpresenter_p.h"
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#include "chartanimator_p.h"
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#include <QPainter>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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SplineChartItem::SplineChartItem(QSplineSeries *series, ChartPresenter *presenter) :
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XYChartItem(series, presenter),
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m_series(series),
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m_pointsVisible(false)
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{
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setZValue(ChartPresenter::LineChartZValue);
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QObject::connect(series,SIGNAL(updated()),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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return m_path;
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}
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void SplineChartItem::updateLayout(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints,int index)
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{
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QVector<QPointF> controlPoints;
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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 (controlPoints.count()<2) {
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setLayout(newPoints,controlPoints);
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return;
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}
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if (animator()) {
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animator()->updateLayout(this,oldPoints,newPoints,m_controlPoints,controlPoints,index);
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} else {
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setLayout(newPoints,controlPoints);
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}
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}
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QPointF SplineChartItem::calculateGeometryControlPoint(int index) const
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{
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return XYChartItem::calculateGeometryPoint(m_series->controlPoint(index));
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}
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void SplineChartItem::setLayout(QVector<QPointF> &points, QVector<QPointF> &controlPoints)
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{
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if ((points.size()<2) || (controlPoints.size()<2)) {
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XYChartItem::setLayout(points);
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m_controlPoints=controlPoints;
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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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m_path = splinePath;
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m_rect = splinePath.boundingRect();
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XYChartItem::setLayout(points);
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m_controlPoints=controlPoints;
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}
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//handlers
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void SplineChartItem::handleUpdated()
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{
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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->setClipRect(clipRect());
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painter->setPen(m_linePen);
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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(points());
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}
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painter->restore();
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}
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#include "moc_splinechartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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