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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 "xychart_p.h"
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#include "qxyseries.h"
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#include "qxyseries_p.h"
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#include "chartpresenter_p.h"
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#include "domain_p.h"
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#include "qxymodelmapper.h"
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#include <QPainter>
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#include <QAbstractItemModel>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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//TODO: optimize : remove points which are not visible
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XYChart::XYChart(QXYSeries *series, ChartPresenter *presenter)
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: ChartElement(presenter),
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m_minX(0),
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m_maxX(0),
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m_minY(0),
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m_maxY(0),
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m_series(series),
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m_animation(0),
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m_dirty(true)
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{
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QObject::connect(series, SIGNAL(pointReplaced(int)), this, SLOT(handlePointReplaced(int)));
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QObject::connect(series, SIGNAL(pointsReplaced()), this, SLOT(handlePointsReplaced()));
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QObject::connect(series, SIGNAL(pointAdded(int)), this, SLOT(handlePointAdded(int)));
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QObject::connect(series, SIGNAL(pointRemoved(int)), this, SLOT(handlePointRemoved(int)));
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QObject::connect(this, SIGNAL(clicked(QPointF)), series, SIGNAL(clicked(QPointF)));
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}
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void XYChart::setGeometryPoints(const QVector<QPointF>& points)
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{
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m_points = points;
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}
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void XYChart::setClipRect(const QRectF &rect)
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{
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m_clipRect = rect;
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}
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void XYChart::setAnimation(XYAnimation *animation)
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{
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m_animation = animation;
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}
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void XYChart::setDirty(bool dirty)
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{
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m_dirty = dirty;
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}
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QPointF XYChart::calculateGeometryPoint(const QPointF &point) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / (m_maxY - m_minY);
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qreal x = (point.x() - m_minX) * deltaX;
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qreal y = (point.y() - m_minY) * -deltaY + m_size.height();
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return QPointF(x, y);
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}
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QPointF XYChart::calculateGeometryPoint(int index) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / (m_maxY - m_minY);
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const QList<QPointF>& vector = m_series->points();
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qreal x = (vector[index].x() - m_minX) * deltaX;
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qreal y = (vector[index].y() - m_minY) * -deltaY + m_size.height();
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return QPointF(x, y);
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}
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QVector<QPointF> XYChart::calculateGeometryPoints() const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / (m_maxY - m_minY);
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QVector<QPointF> result;
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result.resize(m_series->count());
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const QList<QPointF>& vector = m_series->points();
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for (int i = 0; i < m_series->count(); ++i) {
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qreal x = (vector[i].x() - m_minX) * deltaX;
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qreal y = (vector[i].y() - m_minY) * -deltaY + m_size.height();
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result[i].setX(x);
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result[i].setY(y);
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}
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return result;
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}
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QPointF XYChart::calculateDomainPoint(const QPointF &point) const
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{
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const qreal deltaX = m_size.width() / (m_maxX - m_minX);
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const qreal deltaY = m_size.height() / (m_maxY - m_minY);
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qreal x = point.x() / deltaX + m_minX;
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qreal y = (point.y() - m_size.height()) / (-deltaY) + m_minY;
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return QPointF(x, y);
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}
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void XYChart::updateChart(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, int index)
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{
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if (m_animation) {
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m_animation->setup(oldPoints, newPoints, index);
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m_points = newPoints;
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setDirty(false);
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presenter()->startAnimation(m_animation);
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} else {
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m_points = newPoints;
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updateGeometry();
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}
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}
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//handlers
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void XYChart::handlePointAdded(int index)
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{
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Q_ASSERT(index < m_series->count());
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Q_ASSERT(index >= 0);
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QVector<QPointF> points;
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if (m_dirty) {
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points = calculateGeometryPoints();
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} else {
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points = m_points;
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QPointF point = calculateGeometryPoint(index);
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points.insert(index, point);
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}
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updateChart(m_points, points, index);
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}
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void XYChart::handlePointRemoved(int index)
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{
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Q_ASSERT(index <= m_series->count());
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Q_ASSERT(index >= 0);
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QVector<QPointF> points;
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if (m_dirty) {
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points = calculateGeometryPoints();
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} else {
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points = m_points;
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points.remove(index);
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}
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updateChart(m_points, points, index);
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}
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void XYChart::handlePointReplaced(int index)
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{
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Q_ASSERT(index < m_series->count());
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Q_ASSERT(index >= 0);
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QVector<QPointF> points;
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if (m_dirty) {
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points = calculateGeometryPoints();
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} else {
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QPointF point = calculateGeometryPoint(index);
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points = m_points;
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points.replace(index, point);
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}
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updateChart(m_points, points, index);
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}
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void XYChart::handlePointsReplaced()
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{
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// All the points were replaced -> recalculate
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QVector<QPointF> points = calculateGeometryPoints();
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updateChart(m_points, points, -1);
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}
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void XYChart::handleDomainUpdated()
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{
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m_minX = domain()->minX();
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m_maxX = domain()->maxX();
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m_minY = domain()->minY();
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m_maxY = domain()->maxY();
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if (isEmpty()) return;
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QVector<QPointF> points = calculateGeometryPoints();
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updateChart(m_points, points);
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}
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void XYChart::handleGeometryChanged(const QRectF &rect)
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{
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Q_ASSERT(rect.isValid());
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m_size = rect.size();
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m_clipRect = rect.translated(-rect.topLeft());
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m_origin = rect.topLeft();
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if (isEmpty()) return;
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QVector<QPointF> points = calculateGeometryPoints();
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updateChart(m_points, points);
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}
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bool XYChart::isEmpty()
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{
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return !m_clipRect.isValid() || qFuzzyIsNull(m_maxX - m_minX) || qFuzzyIsNull(m_maxY - m_minY) || m_series->points().isEmpty();
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}
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#include "moc_xychart_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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