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#include "bargroup.h"
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#include "bar.h"
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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// TODO: singleton?
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//BarGroup* BarGroup::mBarGroupInstance = NULL;
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//BarGroup::BarGroup(QGraphicsItem *parent) :
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// QGraphicsItem(parent)
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// ,mSeries(series)
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BarGroup::BarGroup(BarChartSeries& series, QGraphicsItem *parent) :
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ChartItem(parent)
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,mSeries(series)
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,mLayoutSet(false)
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,mLayoutDirty(true)
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,mBarDefaultWidth(10)
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{
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dataChanged();
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}
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void BarGroup::setSize(const QSize& size)
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{
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// TODO: refactor this
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qDebug() << "BarGroup::setSize";
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resize(size.width(),size.height());
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}
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void BarGroup::setPlotDomain(const PlotDomain& data)
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{
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qDebug() << "BarGroup::setPlotDomain";
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// TODO:
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}
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void BarGroup::resize( int w, int h )
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{
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qDebug() << "QBarChart::resize";
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mWidth = w;
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mHeight = h;
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layoutChanged();
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mLayoutSet = true;
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}
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void BarGroup::setBarWidth( int w )
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{
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mBarDefaultWidth = w;
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}
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int BarGroup::addColor( QColor color )
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{
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int colorIndex = mColors.count();
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mColors.append(color);
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return colorIndex;
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}
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void BarGroup::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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if (!mLayoutSet) {
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qDebug() << "QBarChart::paint called without layout set. Aborting.";
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return;
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}
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if (mLayoutDirty) {
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// Layout or data has changed. Need to redraw.
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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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}
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QRectF BarGroup::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 BarGroup::dataChanged()
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{
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qDebug() << "QBarChart::dataChanged mSeries";
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// Find out maximum and minimum of all series
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mMax = mSeries.max();
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mMin = mSeries.min();
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// Delete old bars
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// Is this correct way to delete childItems?
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foreach (QGraphicsItem* item, childItems()) {
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delete item;
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}
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// Create new graphic items for bars
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int totalItems = mSeries.countTotalItems();
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for (int i=0; i<totalItems; i++) {
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Bar *bar = new Bar(this);
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childItems().append(bar);
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}
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mLayoutDirty = true;
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}
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void BarGroup::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.countSeries() <= 0) {
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// Nothing to do.
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return;
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}
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// TODO: better way to auto-layout
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int count = mSeries.countItemsInSeries();
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int posStep = (mWidth / (count+1));
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int startPos = (mWidth / (count+1)) - mSeries.countSeries() * mBarDefaultWidth /2;
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qDebug() << "startpos" << startPos;
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// Scaling.
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int itemIndex(0);
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for (int series = 0; series < mSeries.countSeries(); series++) {
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for (int item=0; item < mSeries.countItemsInSeries(); item++) {
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qDebug() << itemIndex;
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int barHeight = mSeries.valueAt(series, item) * mHeight / mMax;
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Bar* bar = reinterpret_cast<Bar*> (childItems().at(itemIndex));
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// TODO: width settable per bar?
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bar->resize(mBarDefaultWidth, barHeight);
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bar->setColor(mColors.at(series));
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// TODO: bar width shouldn't affect height. Currently it does because pen width also affects height. (QPainter thingy...)
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bar->setPos(item*posStep+startPos + series * mBarDefaultWidth, mHeight - barHeight + mBarDefaultWidth);
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itemIndex++;
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}
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}
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mLayoutDirty = true;
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}
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QTCOMMERCIALCHART_END_NAMESPACE
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