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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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QGraphicsItem(parent)
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,mSeries(series)
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,mLayoutSet(false)
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,mLayoutDirty(true)
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{
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dataChanged();
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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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void BarGroup::setColor( QColor color )
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{
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mColor = color;
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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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// TODO: correct this (currently ignores position)
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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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int count = mSeries.countSeries();
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if (count <= 0) {
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// Nothing to do.
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return;
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}
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// Align center
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int posStep = (mWidth / (count));
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int startPos = (mWidth / count+1);
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qDebug() << "startpos" << startPos;
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// Scaling. TODO: better one.
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int itemIndex(0);
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for (int series = 0; series < count; series++) {
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for (int item=0; item < count; item++) {
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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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bar->resize(mBarDefaultWidth, barHeight); // TODO: width settable per bar
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bar->setColor(mColor);
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bar->setPos(itemIndex*posStep+startPos, 0);
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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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