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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 "barchartitem_p.h"
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#include "bar_p.h"
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#include "qbarset.h"
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#include "qbarset_p.h"
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#include "qbarseries.h"
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#include "qbarseries_p.h"
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#include "qchart.h"
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#include "chartpresenter_p.h"
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#include "chartanimator_p.h"
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#include "chartdataset_p.h"
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#include <QPainter>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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BarChartItem::BarChartItem(QBarSeries *series, ChartPresenter *presenter) :
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ChartItem(presenter),
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m_series(series)
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{
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setFlag(ItemClipsChildrenToShape);
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connect(series->d_func(), SIGNAL(updatedBars()), this, SLOT(handleLayoutChanged()));
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connect(series->d_func(), SIGNAL(labelsVisibleChanged(bool)), this, SLOT(handleLabelsVisibleChanged(bool)));
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connect(series->d_func(), SIGNAL(restructuredBars()), this, SLOT(handleDataStructureChanged()));
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setZValue(ChartPresenter::BarSeriesZValue);
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handleDataStructureChanged();
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}
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BarChartItem::~BarChartItem()
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{
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}
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void BarChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(painter);
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Q_UNUSED(option);
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Q_UNUSED(widget);
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}
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QRectF BarChartItem::boundingRect() const
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{
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return m_rect;
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}
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void BarChartItem::handleDataStructureChanged()
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{
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foreach(QGraphicsItem *item, childItems()) {
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delete item;
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}
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m_bars.clear();
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m_labels.clear();
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m_layout.clear();
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bool labelsVisible = m_series->isLabelsVisible();
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// Create new graphic items for bars
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for (int c = 0; c < m_series->d_func()->categoryCount(); c++) {
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for (int s = 0; s < m_series->barsetCount(); s++) {
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QBarSet *set = m_series->d_func()->barsetAt(s);
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// Bars
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Bar *bar = new Bar(set,c,this);
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m_bars.append(bar);
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connect(bar, SIGNAL(clicked(QBarSet*,int)), m_series, SIGNAL(clicked(QBarSet*,int)));
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connect(bar, SIGNAL(hovered(QBarSet*,bool)), m_series, SIGNAL(hovered(QBarSet*,bool)));
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m_layout.append(QRectF(0, 0, 0, 0));
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// Labels
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QGraphicsSimpleTextItem *label = new QGraphicsSimpleTextItem(this);
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label->setVisible(labelsVisible);
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m_labels.append(label);
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}
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}
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// TODO: Is this the right place to call it?
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// presenter()->chartTheme()->decorate(m_series, presenter()->dataSet()->seriesIndex(m_series));
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handleLayoutChanged();
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}
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QVector<QRectF> BarChartItem::calculateLayout()
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{
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QVector<QRectF> layout;
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// Use temporary qreals for accuracy
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qreal categoryCount = m_series->d_func()->categoryCount();
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qreal setCount = m_series->barsetCount();
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bool barsVisible = m_series->isVisible();
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// Domain:
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qreal width = geometry().width();
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qreal height = geometry().height();
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qreal rangeY = m_domainMaxY - m_domainMinY;
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qreal rangeX = m_domainMaxX - m_domainMinX;
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qreal scaleY = (height / rangeY);
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qreal scaleX = (width / rangeX);
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qreal barWidth = scaleX - scaleX * m_series->d_func()->barMargin();
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int itemIndex(0);
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for (int category = 0; category < categoryCount; category++) {
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qreal yPos = height + scaleY * m_domainMinY + geometry().topLeft().y();
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for (int set = 0; set < setCount; set++) {
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QBarSet* barSet = m_series->d_func()->barsetAt(set);
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qreal xPos = (barSet->at(category).x() - m_domainMinX) * scaleX + m_rect.left() - barWidth/2;
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qreal barHeight = barSet->at(category).y() * scaleY;
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Bar* bar = m_bars.at(itemIndex);
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QRectF rect(xPos, yPos - barHeight, barWidth, barHeight);
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layout.append(rect);
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bar->setPen(barSet->pen());
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bar->setBrush(barSet->brush());
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bar->setVisible(barsVisible);
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QGraphicsSimpleTextItem* label = m_labels.at(itemIndex);
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if (!qFuzzyIsNull(barSet->at(category).y())) {
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label->setText(QString::number(barSet->at(category).y()));
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} else {
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label->setText(QString(""));
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}
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label->setPos(xPos + (rect.width()/2 - label->boundingRect().width()/2)
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,yPos - barHeight/2 - label->boundingRect().height()/2);
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label->setFont(barSet->labelFont());
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label->setBrush(barSet->labelBrush());
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itemIndex++;
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}
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}
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return layout;
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}
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void BarChartItem::applyLayout(const QVector<QRectF> &layout)
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{
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if (animator()) {
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animator()->updateLayout(this, m_layout, layout);
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} else {
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setLayout(layout);
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}
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}
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void BarChartItem::setLayout(const QVector<QRectF> &layout)
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{
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m_layout = layout;
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for (int i=0; i < m_bars.count(); i++) {
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m_bars.at(i)->setRect(layout.at(i));
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}
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update();
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}
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//handlers
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void BarChartItem::handleDomainChanged(qreal minX, qreal maxX, qreal minY, qreal maxY)
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{
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m_domainMinX = minX;
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m_domainMaxX = maxX;
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m_domainMinY = minY;
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m_domainMaxY = maxY;
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handleLayoutChanged();
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}
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void BarChartItem::handleGeometryChanged(const QRectF &rect)
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{
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prepareGeometryChange();
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m_rect = rect;
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handleLayoutChanged();
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}
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void BarChartItem::handleLayoutChanged()
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{
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if ((m_rect.width() <= 0) || (m_rect.height() <= 0)) {
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// rect size zero.
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return;
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}
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QVector<QRectF> layout = calculateLayout();
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applyLayout(layout);
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update();
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}
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void BarChartItem::handleLabelsVisibleChanged(bool visible)
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{
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foreach (QGraphicsSimpleTextItem* label, m_labels) {
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label->setVisible(visible);
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}
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update();
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}
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#include "moc_barchartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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