piechart.h

   1 #ifndef PIECHART_H_
   2 #define PIECHART_H_
   3
   4 #include "task.h"
   5
   6 class TaskSummaryPieChart : public QGraphicsItem
   7 {
   8 public:
   9     TaskSummaryPieChart(QGraphicsItem* parent = NULL) : QGraphicsItem(parent)
  10     {
  11         setAcceptsHoverEvents(true);
  12     }
  13     QRectF boundingRect() const { return QRectF(-0.61,-0.6,1.2,1.2);}
  14     void setHits(const QList<HitElement>& hits)
  15     {
  16         qDeleteAll(m_subItems);
  17         m_subItems.clear();
  18
  19         // compute total values per task
  20         double total=0;
  21         QMap<Task*, double> totals;
  22         for(QList<HitElement>::const_iterator itr = hits.begin(); itr!= hits.end(); itr++) {
  23             const HitElement& element = (*itr);
  24             total += element.duration;
  25             totals[element.task] = totals.value(element.task, 0) + element.duration;
  26         }
  27         // sort total values
  28         QMap<double, Task*> sortedTotals;
  29         for(QMap<Task*, double>::const_iterator titr = totals.begin(); titr!=totals.end(); titr++) {
  30             sortedTotals.insertMulti(titr.value(), titr.key());
  31         }
  32         double startAngle = 90;
  33         for(QMap<double, Task*>::const_iterator itr = sortedTotals.begin(); itr != sortedTotals.end(); itr++) {
  34             Task* task = (*itr);
  35             double spanAngle = itr.key() / (total) * 360;
  36             QGraphicsPathItem* pathItem = new QGraphicsPathItem(this);
  37             scene()->addItem(pathItem);
  38             pathItem->setToolTip(task->title);
  39             QPainterPath path;
  40             QPainterPath p;
  41             p.moveTo(0,0);
  42             p.arcTo(boundingRect(), startAngle, spanAngle);
  43             p.closeSubpath();
  44             pathItem->setPath(p);
  45             pathItem->setBrush(task->bgColor);
  46             pathItem->setPen(QPen(QBrush(task->fgColor),0));
  47             startAngle += spanAngle;
  48             m_subItems.insert(task , pathItem);
  49         }
  50     }
  51     virtual void paint ( QPainter * painter, const QStyleOptionGraphicsItem * /* option */, QWidget * /* widget */ )
  52     {
  53     }
  54 //    void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
  55
  56 protected:
  57     QMap<Task*, QGraphicsPathItem*> m_subItems;
  58 };
  59
  60 #endif