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#include "stackedbarpresenter.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 "qbarset.h"
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#include <QDebug>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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StackedBarPresenter::StackedBarPresenter(BarChartModel& model, QGraphicsItem *parent) :
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BarPresenterBase(model,parent)
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{
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}
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void StackedBarPresenter::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.countSets() <= 0) {
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qDebug() << "No sets in model!";
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// Nothing to do.
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return;
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}
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if (mModel.countCategories() == 0) {
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qDebug() << "No categories in model!";
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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 category count...
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qreal maxSum = mModel.maxCategorySum();
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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.countCategories() + 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.countSets() * mModel.countCategories();
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for (int category = 0; category < mModel.countCategories(); category++) {
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qreal yPos = h;
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for (int set=0; set < mModel.countSets(); set++) {
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qreal barHeight = mModel.valueAt(set, category) * 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->setBrush(mModel.setAt(set).brush());
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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.countCategories() - 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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