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#include "qbarchart.h"
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#include "qbarchartbar.h"
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#include <QDebug>
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QBarChart::QBarChart(QGraphicsItem *parent) :
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QGraphicsItem(parent)
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,mBarDefaultWidth( 1 )
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{
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}
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void QBarChart::addSeries(QList<int> data)
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{
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mData.clear();
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mData.append(data);
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dataChanged();
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}
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void QBarChart::setSize( int h, int w )
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{
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mHeight = h;
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mWidth = w;
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dataChanged(); // TODO: separate data from grid
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}
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void QBarChart::setBarWidth( int w )
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{
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mBarDefaultWidth = w;
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}
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void QBarChart::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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qDebug() << "QBarChart::paint";
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}
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QRectF QBarChart::boundingRect() const
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{
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return QRectF(0,0,mWidth,mHeight); // TODO: size from layout
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}
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void QBarChart::dataChanged()
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{
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int count = mData.count();
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if (count <= 0) {
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// No items
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return;
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}
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mMax = mData.at(0);
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mMin = mData.at(0);
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// Find out min and max values.
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for (int i=0; i<count; i++) {
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if (mData.at(i) > mMax) {
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mMax = mData.at(i);
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} else if (mData.at(i) < mMin) {
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mMin = mData.at(i);
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}
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}
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// Create items for data, delete old ones
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foreach (QGraphicsItem* i, childItems()) {
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delete i;
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}
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gridChanged();
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int posStep = (mWidth / count) / 2; // TODO: Why I need magical 2 here to get correct step?
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for (int i=0; i<count; i++) {
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QBarChartBar *bar = new QBarChartBar(this);
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// Scaling. TODO: better one.
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int barHeight = mData.at(i) * mHeight / mMax;
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bar->setSize(barHeight, mBarDefaultWidth * 3 * i); // TODO: widht settable by style or something.
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bar->setColor(QColor(255 - i*25, i*10, i*15));
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bar->setPos(i*posStep, 0);
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childItems().append(bar);
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}
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}
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void QBarChart::gridChanged()
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{
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// Scale of grid has changed
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QBarChartGrid *grid = new QBarChartGrid(this);
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grid->setSize(mHeight, mWidth);
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grid->setLimits(mMin,mMax);
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grid->setHorizontalLineCount(5);
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childItems().append(grid);
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}
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