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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 "xychartitem_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 "chartanimator_p.h"
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#include <QPainter>
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#include <QGraphicsSceneMouseEvent>
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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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XYChartItem::XYChartItem(QXYSeries *series, ChartPresenter *presenter):ChartItem(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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{
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connect(series->d_func(),SIGNAL(pointReplaced(int)),this,SLOT(handlePointReplaced(int)));
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connect(series->d_func(),SIGNAL(pointAdded(int)),this,SLOT(handlePointAdded(int)));
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connect(series->d_func(),SIGNAL(pointsAdded(int, int)),this,SLOT(handlePointsAdded(int, int)));
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connect(series->d_func(),SIGNAL(pointRemoved(int)),this,SLOT(handlePointRemoved(int)));
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connect(series->d_func(),SIGNAL(pointsRemoved(int, int)),this,SLOT(handlePointsRemoved(int, int)));
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connect(this,SIGNAL(clicked(QPointF)),series,SIGNAL(clicked(QPointF)));
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}
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QPointF XYChartItem::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 XYChartItem::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> XYChartItem::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 XYChartItem::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 XYChartItem::updateLayout(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints,int index)
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{
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if (animator()) {
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animator()->updateLayout(this,oldPoints,newPoints,index);
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} else {
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setLayout(newPoints);
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}
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}
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void XYChartItem::setLayout(QVector<QPointF> &points)
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{
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m_points = points;
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update();
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}
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//handlers
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void XYChartItem::handlePointAdded(int index)
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{
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if (m_series->model() == 0) {
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Q_ASSERT(index<m_series->count());
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Q_ASSERT(index>=0);
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}
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QVector<QPointF> points = m_points;
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QPointF point;
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point = calculateGeometryPoint(index);
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points.insert(index, point);
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updateLayout(m_points, points, index);
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update();
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}
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void XYChartItem::handlePointsAdded(int start, int end)
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{
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if (m_series->model() == 0) {
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for (int i = start; i <= end; i++)
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handlePointAdded(i);
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} else {
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// series uses model as a data source
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int first = m_series->mapFirst();
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int count = m_series->mapCount();
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int addedCount = end - start + 1;
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if (count != -1 && start >= first + count) {
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return;
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}
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// adding items to unlimited map
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else if (count == -1 && start >= first) {
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for (int i = start; i <= end; i++)
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handlePointAdded(i - first);
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} else if (count == - 1 && start < first) {
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// not all newly added items
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for (int i = first; i < first + addedCount; i++)
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handlePointAdded(i - first);
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}
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// commented out code below does the same thing, but its more confusing.
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// } else if (count == -1) {
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// int begin = qMax(start, first);
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// for (int i = begin; i < begin + (end - start + 1); i++)
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// handlePointAdded(i - first);
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// }
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// adding items to limited map
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else if (start >= first) {
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// remove the items that will no longer fit into the map
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// int toRemove = addedCount - (count - points().size());
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for (int i = start; i <= end; i++) {
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handlePointAdded(i - first);
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}
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if (m_points.size() > count)
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for (int i = m_points.size() - 1; i >= count; i--)
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handlePointRemoved(i);
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// update();
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} else {
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//
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for (int i = first; i < first + addedCount; i++) {
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handlePointAdded(i - first);
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}
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if (m_points.size() > count)
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for (int i = m_points.size() - 1; i >= count; i--)
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handlePointRemoved(i);
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}
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}
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}
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void XYChartItem::handlePointRemoved(int index)
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{
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if (m_series->model() == 0) {
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Q_ASSERT(index<m_series->count() + 1);
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Q_ASSERT(index>=0);
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}
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QVector<QPointF> points = m_points;
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points.remove(index);
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updateLayout(m_points, points, index);
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update();
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}
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void XYChartItem::handlePointsRemoved(int start, int end)
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{
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Q_UNUSED(start)
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Q_UNUSED(end)
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if (m_series->model() == 0) {
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for (int i = end; i >= start; i--)
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handlePointRemoved(i);
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} else {
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// series uses model as a data source
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int first = m_series->mapFirst();
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int count = m_series->mapCount();
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int removedCount = end - start + 1;
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if (count != -1 && start >= first + count) {
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return;
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}
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// removing items from unlimited map
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else if (count == -1 && start >= first) {
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for (int i = end; i >= start; i--)
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handlePointRemoved(i - first);
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} else if (count == - 1 && start < first) {
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// not all removed items
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for (int i = first + removedCount - 1; i >= first; i--)
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handlePointRemoved(i - first);
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}
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// removing items from limited map
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else if (start >= first) {
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//
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int lastExisting = qMin(first + m_points.size() - 1, end);
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for (int i = lastExisting; i >= start; i--) {
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handlePointRemoved(i - first);
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}
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// the map is limited, so after removing the items some new items may have fall within the mapped area
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int itemsAvailable;
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if (m_series->mapOrientation() == Qt::Vertical)
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itemsAvailable = m_series->model()->rowCount() - first - m_points.size();
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else
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itemsAvailable = m_series->model()->columnCount() - first - m_points.size();
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int toBeAdded = qMin(itemsAvailable, count - m_points.size());
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int currentSize = m_points.size();
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if (itemsAvailable > 0)
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for (int i = m_points.size(); i < currentSize + toBeAdded; i++)
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handlePointAdded(i);
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} else {
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// first removed item lays before the mapped area
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int toRemove = qMin(m_points.size() - 1, removedCount);
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for (int i = first; i < first + toRemove; i++)
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handlePointRemoved(0);
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// the map is limited, so after removing the items some new items may have fall into the map
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int itemsAvailable;
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if (m_series->mapOrientation() == Qt::Vertical)
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itemsAvailable = m_series->model()->rowCount() - first - m_points.size();
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else
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itemsAvailable = m_series->model()->columnCount() - first - m_points.size();
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int toBeAdded = qMin(itemsAvailable, count - m_points.size());
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int currentSize = m_points.size();
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if (itemsAvailable > 0)
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for (int i = m_points.size(); i < currentSize + toBeAdded; i++)
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handlePointAdded(i);
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}
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}
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}
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void XYChartItem::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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QPointF point = calculateGeometryPoint(index);
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QVector<QPointF> points = m_points;
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points.replace(index,point);
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updateLayout(m_points,points,index);
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update();
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}
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void XYChartItem::handleDomainChanged(qreal minX, qreal maxX, qreal minY, qreal maxY)
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{
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m_minX=minX;
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m_maxX=maxX;
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m_minY=minY;
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m_maxY=maxY;
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if (isEmpty()) return;
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QVector<QPointF> points = calculateGeometryPoints();
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updateLayout(m_points,points);
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update();
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}
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void XYChartItem::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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setPos(rect.topLeft());
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if (isEmpty()) return;
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QVector<QPointF> points = calculateGeometryPoints();
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updateLayout(m_points,points);
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update();
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}
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bool XYChartItem::isEmpty()
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{
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return !m_clipRect.isValid() || qFuzzyIsNull(m_maxX - m_minX) || qFuzzyIsNull(m_maxY - m_minY);
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}
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void XYChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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emit clicked(calculateDomainPoint(event->pos()));
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}
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#include "moc_xychartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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