| 72 | } |
| 73 | |
| 74 | void HistogramView::drawBackground(QPainter* painter, const QRectF& rect) { |
| 75 | if (!bins) |
| 76 | return; |
| 77 | |
| 78 | painter->save(); |
| 79 | painter->setRenderHint(QPainter::Antialiasing); |
| 80 | int max = 1; |
| 81 | for (int i = 0; i <= m_range; i++) |
| 82 | if (bins[i] > max) |
| 83 | max = bins[i]; |
| 84 | |
| 85 | // convert y-scale count to log scale so small counts are still visible |
| 86 | // scene rect is 1000*100 where upper 1000*80 is for histogram graph |
| 87 | // and lower 1000*20 is for histogram scale |
| 88 | QPainterPath path(QPointF(0, (log(bins[0]) * 100 / log(max)))); |
| 89 | for (int i = 1; i <= m_range; i++) { |
| 90 | int x = i * 1000 / m_range; |
| 91 | int y = 80; |
| 92 | if (bins[i] > 1) |
| 93 | y = 80 - (log(bins[i]) * 80 / log(max)); |
| 94 | |
| 95 | path.lineTo(QPointF(x, y)); |
| 96 | } |
| 97 | |
| 98 | painter->drawPath(path); |
| 99 | invalidateScene(rect, QGraphicsScene::BackgroundLayer); |
| 100 | painter->restore(); |
| 101 | } |
| 102 | |
| 103 | DatapickerImageWidget::DatapickerImageWidget(QWidget* parent) |
| 104 | : BaseDock(parent) |