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#include "barchartitem_p.h"
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#include "bar_p.h"
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#include "barvalue_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 <QDebug>
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#include <QToolTip>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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BarChartItem::BarChartItem(QBarSeries *series, QChart *parent) :
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ChartItem(parent),
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mHeight(0),
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mWidth(0),
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mLayoutSet(false),
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mSeries(series),
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mChart(parent)
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{
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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(layoutChanged()));
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setZValue(ChartPresenter::BarSeriesZValue);
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initAxisLabels();
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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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if (!mLayoutSet) {
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qDebug() << "BarChartItem::paint called without layout set. Aborting.";
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return;
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}
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foreach(QGraphicsItem* i, childItems()) {
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i->paint(painter,option,widget);
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}
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}
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QRectF BarChartItem::boundingRect() const
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{
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return QRectF(0, 0, mWidth, mHeight);
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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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// Delete old bars
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foreach (QGraphicsItem* item, childItems()) {
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delete item;
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}
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mBars.clear();
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mFloatingValues.clear();
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// Create new graphic items for bars
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for (int c=0; c<mSeries->categoryCount(); c++) {
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QString category = mSeries->categoryName(c);
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for (int s=0; s<mSeries->barsetCount(); s++) {
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QBarSet *set = mSeries->barsetAt(s);
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Bar *bar = new Bar(category,this);
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childItems().append(bar);
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mBars.append(bar);
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connect(bar,SIGNAL(clicked(QString)),set,SIGNAL(clicked(QString)));
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connect(bar,SIGNAL(rightClicked(QString)),set,SIGNAL(rightClicked(QString)));
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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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}
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}
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// Create floating values
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for (int category=0; category<mSeries->categoryCount(); category++) {
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for (int s=0; s<mSeries->barsetCount(); s++) {
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QBarSet *set = mSeries->barsetAt(s);
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BarValue *value = new BarValue(*set, this);
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childItems().append(value);
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mFloatingValues.append(value);
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connect(set,SIGNAL(toggleFloatingValues()),value,SLOT(toggleVisible()));
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}
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}
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}
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void BarChartItem::layoutChanged()
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{
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// Scale bars to new layout
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// Layout for bars:
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if (mSeries->barsetCount() <= 0) {
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qDebug() << "No sets in model!";
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return;
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}
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if (childItems().count() == 0) {
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qDebug() << "WARNING: BarChartitem::layoutChanged called before graphics items are created!";
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return;
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}
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// Use temporary qreals for accurancy (we might get some compiler warnings... :)
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int categoryCount = mSeries->categoryCount();
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int setCount = mSeries->barsetCount();
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qreal tW = mWidth;
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qreal tH = mHeight;
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qreal tM = mSeries->max();
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qreal scale = (tH/tM);
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qreal tC = categoryCount + 1;
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qreal categoryWidth = tW/tC;
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mBarWidth = 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 + categoryWidth /2 + mBarWidth/2;
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qreal yPos = mHeight;
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for (int set = 0; set < setCount; set++) {
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qreal barHeight = mSeries->valueAt(set,category) * scale;
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Bar* bar = mBars.at(itemIndex);
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// TODO: width settable per bar?
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bar->resize(mBarWidth, barHeight);
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bar->setPen(mSeries->barsetAt(set)->pen());
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bar->setBrush(mSeries->barsetAt(set)->brush());
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bar->setPos(xPos, yPos-barHeight);
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itemIndex++;
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xPos += mBarWidth;
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}
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}
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// Position floating values
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itemIndex = 0;
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for (int category=0; category < mSeries->categoryCount(); category++) {
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qreal xPos = categoryWidth * category + categoryWidth/2 + mBarWidth;
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qreal yPos = mHeight;
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for (int set=0; set < mSeries->barsetCount(); set++) {
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qreal barHeight = mSeries->valueAt(set,category) * scale;
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BarValue* value = mFloatingValues.at(itemIndex);
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QBarSet* barSet = mSeries->barsetAt(set);
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value->resize(100,50); // TODO: proper layout for this.
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value->setPos(xPos, yPos-barHeight/2);
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value->setPen(barSet->floatingValuePen());
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if (mSeries->valueAt(set,category) != 0) {
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value->setValueString(QString::number(mSeries->valueAt(set,category)));
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} else {
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value->setValueString(QString(""));
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}
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itemIndex++;
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xPos += mBarWidth;
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}
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}
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update();
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}
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void BarChartItem::initAxisLabels()
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{
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int count = mSeries->categoryCount();
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if (0 == count) {
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return;
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}
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mChart->axisX()->setTicksCount(count+2);
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qreal min = 0;
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qreal max = count+1;
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mChart->axisX()->setMin(min);
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mChart->axisX()->setMax(max);
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QChartAxisCategories* categories = mChart->axisX()->categories();
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categories->clear();
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for (int i=0; i<count; i++) {
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categories->insert(i+1,mSeries->categoryName(i));
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}
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mChart->axisX()->setLabelsVisible(true);
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}
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//handlers
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void BarChartItem::handleModelChanged(int index)
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{
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Q_UNUSED(index)
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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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// TODO:
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Q_UNUSED(minX)
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Q_UNUSED(maxX)
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Q_UNUSED(minY)
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Q_UNUSED(maxY)
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/*
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int count = mSeries->categoryCount();
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if (0 == count) {
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return;
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}
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// Position labels to domain
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qreal min = domain.minX();
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qreal max = domain.maxX();
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qreal step = (max-min)/count;
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QChartAxisCategories& categories = mChart->axisX()->categories();
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categories.clear();
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for (int i=0; i<count; i++) {
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categories.insert(min,mSeries->categoryName(i));
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min += step;
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}
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*/
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}
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void BarChartItem::handleGeometryChanged(const QRectF& rect)
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{
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mWidth = rect.width();
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mHeight = rect.height();
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layoutChanged();
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mLayoutSet = true;
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setPos(rect.topLeft());
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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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