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63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
#include "law_curve_view.h"
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#include "law/normal_law.h"
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#include <assert.h>
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using namespace Shared;
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namespace Probability {
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constexpr KDColor LawCurveView::k_backgroundColor;
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void LawCurveView::reload() {
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CurveView::reload();
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markRectAsDirty(bounds());
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}
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void LawCurveView::drawRect(KDContext * ctx, KDRect rect) const {
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float lowerBound = m_calculation->lowerBound();
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float upperBound = m_calculation->upperBound();
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ctx->fillRect(bounds(), k_backgroundColor);
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drawAxis(ctx, rect, Axis::Horizontal);
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drawLabels(ctx, rect, Axis::Horizontal, false, false, false, 0, k_backgroundColor);
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if (m_law->type() == Law::Type::Normal) {
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// Special case for the normal law, which has always the same curve
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float pixelColorLowerBound = std::round(floatToPixel(Axis::Horizontal, lowerBound));
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float pixelColorUpperBound = std::round(floatToPixel(Axis::Horizontal, upperBound));
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drawStandardNormal(ctx, rect, pixelColorLowerBound, pixelColorUpperBound);
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return;
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}
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if (m_law->isContinuous()) {
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drawCurve(ctx, rect, EvaluateAtAbscissa, m_law, nullptr, Palette::YellowDark, true, lowerBound, upperBound, true);
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} else {
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drawHistogram(ctx, rect, EvaluateAtAbscissa, m_law, nullptr, 0, 1, false, Palette::GreyMiddle, Palette::YellowDark, lowerBound, upperBound+0.5f);
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}
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}
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char * LawCurveView::label(Axis axis, int index) const {
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if (axis == Axis::Vertical) {
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return nullptr;
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}
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return (char *)m_labels[index];
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}
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float LawCurveView::EvaluateAtAbscissa(float abscissa, void * model, void * context) {
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Law * law = (Law *)model;
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return law->evaluateAtAbscissa(abscissa);
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}
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void LawCurveView::drawStandardNormal(KDContext * ctx, KDRect rect, float colorLowerBound, float colorUpperBound) const {
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// Save the previous curve view range
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LawCurveView * constCastedThis = const_cast<LawCurveView *>(this);
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CurveViewRange * previousRange = constCastedThis->curveViewRange();
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// Draw a centered reduced normal curve
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NormalLaw n;
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constCastedThis->setCurveViewRange(&n);
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drawCurve(ctx, rect, EvaluateAtAbscissa, &n, nullptr, Palette::YellowDark, true, pixelToFloat(Axis::Horizontal, colorLowerBound), pixelToFloat(Axis::Horizontal, colorUpperBound), true);
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// Put back the previous curve view range
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constCastedThis->setCurveViewRange(previousRange);
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}
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}
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