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#include "qchartglobal.h"
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#include "qlegend.h"
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#include "qseries.h"
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#include <QPainter>
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#include <QPen>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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// TODO: this to legendmarker_p.h header
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class LegendMarker : public QGraphicsItem
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{
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public:
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LegendMarker(QGraphicsItem *parent = 0) : QGraphicsItem(parent)
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,mBoundingRect(0,0,1,1)
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{}
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void setBoundingRect(const QRectF rect) { mBoundingRect = rect; }
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void setBrush(const QBrush brush) { mBrush = brush; }
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void setName(const QString name) { mName = name; }
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QString name() const { return mName; }
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QColor color() const { return mBrush.color(); }
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0)
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{
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qDebug() << "LegendMarker::paint" << mBoundingRect;
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painter->setBrush(mBrush);
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painter->drawRect(mBoundingRect);
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}
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QRectF boundingRect() const { return mBoundingRect; }
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private:
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QRectF mBoundingRect;
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QBrush mBrush;
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QString mName;
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};
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QLegend::QLegend(QGraphicsItem *parent)
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: QGraphicsObject(parent)
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,mBoundingRect(0,0,1,1)
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{
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}
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void QLegend::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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// TODO: layout for text. using marker layout + magic for now.
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foreach(LegendMarker* m, mMarkers) {
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QRectF r = m->boundingRect();
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painter->setPen(m->color());
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// TODO: r.y + r.height is incorrect. should be r.y. Find the bug, and remove the hack
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painter->drawText(r.x() + 20, r.y()+r.height(), m->name());
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}
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}
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QRectF QLegend::boundingRect() const
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{
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return mBoundingRect;
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}
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void QLegend::handleSeriesAdded(QSeries* series,Domain* domain)
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{
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mSeriesList.append(series);
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dataChanged();
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layoutChanged();
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}
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void QLegend::handleSeriesRemoved(QSeries* series)
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{
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mSeriesList.removeOne(series);
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dataChanged();
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layoutChanged();
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}
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void QLegend::handleGeometryChanged(const QRectF& size)
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{
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mBoundingRect = size;
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layoutChanged();
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}
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void QLegend::dataChanged()
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{
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foreach (QGraphicsItem* i, childItems()) {
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delete i;
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}
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mMarkers.clear();
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foreach (QSeries* s, mSeriesList) {
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for (int i=0; i<s->legendEntries().count(); i++) {
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LegendMarker *marker = new LegendMarker(this);
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marker->setBrush(s->legendEntries().at(i).mBrush);
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marker->setName(s->legendEntries().at(i).mName);
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mMarkers.append(marker);
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childItems().append(marker);
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}
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}
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}
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void QLegend::layoutChanged()
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{
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// Calculate layout for markers and text
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if (mMarkers.count() <= 0) {
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// Nothing to do
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return;
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}
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// TODO: marker defined by series.
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QSizeF markerSize(10,10);
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// TODO: better layout, this is just concept.
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// Leave some space around markers like this: | x x x x |
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qreal steps = mMarkers.count() * 2 + 1;
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qreal yStep = mBoundingRect.height() / steps;
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qreal x = 0;
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qreal y = yStep; // first step is empty
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foreach (LegendMarker* m, mMarkers) {
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m->setBoundingRect(QRectF(x,y,markerSize.width(),markerSize.height()));
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y += yStep*2; // 2 steps per marker (marker and empty space)
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}
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}
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#include "moc_qlegend.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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