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#include "stackedbargroup.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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StackedBarGroup::StackedBarGroup(StackedBarChartSeries& 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(20) // TODO: remove hard coding, when we have layout code ready
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{
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dataChanged();
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}
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void StackedBarGroup::setSize(const QSize& size)
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{
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// qDebug() << "StackedBarGroup::setSize";
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mWidth = size.width();
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mHeight = size.height();
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layoutChanged();
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mLayoutSet = true;
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}
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void StackedBarGroup::setPlotDomain(const PlotDomain& data)
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{
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qDebug() << "StackedBarGroup::setPlotDomain";
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// TODO:
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}
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void StackedBarGroup::setBarWidth( int w )
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{
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mBarDefaultWidth = w;
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}
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int StackedBarGroup::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 StackedBarGroup::resetColors()
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{
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mColors.clear();
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}
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void StackedBarGroup::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 StackedBarGroup::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 StackedBarGroup::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 StackedBarGroup::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.countRows() <= 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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// Use reals for accurancy (we might get some compiler warnings... :)
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qreal maxSum = mSeries.maxColumnSum();
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qreal h = mHeight;
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qreal scale = (h / maxSum);
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int count = mSeries.countColumns();
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int itemIndex(0);
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qreal tW = mWidth;
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qreal tC = count+1;
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qreal xStep = (tW/tC);
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qreal xPos = ((tW/tC) + mBarDefaultWidth / 2);
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for (int column = 0; column < mSeries.countColumns(); column++) {
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qreal yPos = h;
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for (int row=0; row < mSeries.countRows(); row++) {
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qreal barHeight = mSeries.valueAt(row, column) * scale;
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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(row));
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bar->setPos(xPos, yPos);
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itemIndex++;
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yPos -= barHeight;
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}
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xPos += xStep;
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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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