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#include "stackedbargroup.h"
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#include "bar_p.h"
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#include "barlabel_p.h"
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#include "separator_p.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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BarGroupBase(series,parent)
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{
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}
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void StackedBarGroup::layoutChanged()
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{
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// qDebug() << "StackedBarGroup::layoutChanged";
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// Scale bars to new layout
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// Layout for bars:
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if (mModel.countRows() <= 0) {
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// Nothing to do.
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return;
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}
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if (mModel.countColumns() == 0) {
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// Nothing to do
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return;
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}
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if (childItems().count() == 0) {
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qDebug() << "WARNING: StackedBarGroup::layoutChanged called before graphics items are created!";
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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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// TODO: use temp variable for column count...
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qreal maxSum = mModel.maxColumnSum();
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qreal h = mHeight;
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qreal scale = (h / maxSum);
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int itemIndex(0);
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qreal tW = mWidth;
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qreal tC = mModel.countColumns() + 1;
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qreal xStep = (tW/tC);
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qreal xPos = ((tW/tC) - mBarDefaultWidth / 2);
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int labelIndex = mModel.countRows() * mModel.countColumns();
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for (int column = 0; column < mModel.countColumns(); column++) {
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qreal yPos = h;
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for (int row=0; row < mModel.countRows(); row++) {
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qreal barHeight = mModel.valueAt(row, column) * scale;
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Bar* bar = reinterpret_cast<Bar*> (childItems().at(itemIndex));
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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-barHeight);
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itemIndex++;
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yPos -= barHeight;
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}
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// TODO: Layout for labels, remove magic number
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BarLabel* label = reinterpret_cast<BarLabel*> (childItems().at(labelIndex));
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label->setPos(xPos, mHeight + 20);
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labelIndex++;
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xPos += xStep;
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}
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// Position separators
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int separatorIndex = labelIndex; // Separators are after labels in childItems(). TODO: better way to store these?
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xPos = xStep + xStep/2; // Initial position is between first and second group. ie one and half steps from left.
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for (int s=0; s < mModel.countColumns() - 1; s++) {
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Separator* sep = reinterpret_cast<Separator*> (childItems().at(separatorIndex));
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sep->setPos(xPos,0);
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sep->setSize(QSizeF(1,mHeight));
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xPos += xStep;
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separatorIndex++;
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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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