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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 "barlabel_p.h"
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#include "qbarset.h"
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#include "qbarseries.h"
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#include "qchart.h"
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#include "qchartaxis.h"
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#include "qchartaxiscategories.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 <QToolTip>
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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_layoutSet(false),
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m_series(series)
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{
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setFlag(ItemClipsChildrenToShape);
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connect(series, SIGNAL(showToolTip(QPoint,QString)), this, SLOT(showToolTip(QPoint,QString)));
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connect(series, SIGNAL(updatedBars()), this, SLOT(handleLayoutChanged()));
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connect(series, SIGNAL(restructuredBars()), this, SLOT(handleModelChanged()));
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setZValue(ChartPresenter::BarSeriesZValue);
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dataChanged();
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}
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BarChartItem::~BarChartItem()
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{
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disconnect(this,SLOT(showToolTip(QPoint,QString)));
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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.translated(-m_rect.topLeft());
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}
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void BarChartItem::dataChanged()
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{
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// TODO: performance optimizations. Do we really need to delete and create items every time data is changed or can we reuse them?
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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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// Create new graphic items for bars
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for (int c = 0; c < m_series->categoryCount(); c++) {
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QString category = m_series->categoryName(c);
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for (int s = 0; s < m_series->barsetCount(); s++) {
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QBarSet *set = m_series->barsetAt(s);
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Bar *bar = new Bar(category,this);
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m_bars.append(bar);
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connect(bar, SIGNAL(clicked(QString,Qt::MouseButtons)), set, SIGNAL(clicked(QString,Qt::MouseButtons)));
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connect(bar, SIGNAL(hoverEntered(QPoint)), set, SLOT(barHoverEnterEvent(QPoint)));
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connect(bar, SIGNAL(hoverLeaved()), set, SLOT(barHoverLeaveEvent()));
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m_layout.append(QRectF(0, 0, 0, 0));
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}
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}
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// Create labels
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for (int category = 0; category < m_series->categoryCount(); category++) {
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for (int s = 0; s < m_series->barsetCount(); s++) {
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QBarSet *set = m_series->barsetAt(s);
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BarLabel *value = new BarLabel(*set, this);
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m_labels.append(value);
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connect(set,SIGNAL(labelsVisibleChanged(bool)),value,SLOT(labelsVisibleChanged(bool)));
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}
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}
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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 accurancy
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qreal categoryCount = m_series->categoryCount();
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qreal setCount = m_series->barsetCount();
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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 range = m_domainMaxY - m_domainMinY;
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qreal scale = (height / range);
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qreal categoryWidth = width / categoryCount;
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qreal barWidth = categoryWidth / (setCount+1);
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int itemIndex(0);
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for (int category = 0; category < categoryCount; category++) {
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qreal xPos = categoryWidth * category + barWidth / 2;
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qreal yPos = height + scale * m_domainMinY;
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for (int set = 0; set < setCount; set++) {
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QBarSet* barSet = m_series->barsetAt(set);
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qreal barHeight = barSet->valueAt(category) * scale;
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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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BarLabel* label = m_labels.at(itemIndex);
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if (!qFuzzyIsNull(barSet->valueAt(category))) {
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label->setText(QString::number(barSet->valueAt(category)));
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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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itemIndex++;
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xPos += barWidth;
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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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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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update();
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}
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//handlers
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void BarChartItem::handleModelChanged()
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{
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dataChanged();
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}
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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_clipRect = rect.translated(-rect.topLeft());
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m_rect = rect;
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handleLayoutChanged();
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m_layoutSet = true;
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setPos(rect.topLeft());
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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::showToolTip(QPoint pos, QString tip)
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{
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// TODO: cool tooltip instead of default
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QToolTip::showText(pos, tip);
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}
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#include "moc_barchartitem_p.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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