6663b6c9
 adorian
projet complet av...
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#include "histogram_view.h"
#include <assert.h>
#include <cmath>
using namespace Shared;
namespace Statistics {
HistogramView::HistogramView(Store * store, BannerView * bannerView) :
CurveView(store, nullptr, bannerView, nullptr),
m_store(store),
m_labels{},
m_highlightedBarStart(NAN),
m_highlightedBarEnd(NAN)
{
}
void HistogramView::reload() {
CurveView::reload();
float pixelLowerBound = floatToPixel(Axis::Horizontal, m_highlightedBarStart)-2;
float pixelUpperBound = floatToPixel(Axis::Horizontal, m_highlightedBarEnd)+2;
/* We deliberately do not mark as dirty the frame of the banner view to avoid
*unpleasant blinking of the drawing of the banner view. */
KDRect dirtyZone(KDRect(pixelLowerBound, 0, pixelUpperBound-pixelLowerBound,
bounds().height()-m_bannerView->bounds().height()));
markRectAsDirty(dirtyZone);
}
void HistogramView::drawRect(KDContext * ctx, KDRect rect) const {
ctx->fillRect(rect, KDColorWhite);
drawAxes(ctx, rect, Axis::Horizontal);
drawLabels(ctx, rect, Axis::Horizontal, false);
/* We memoize the total size to avoid recomputing it in double precision at
* every call to EvaluateHistogramAtAbscissa() */
float totalSize = m_store->sumOfColumn(1);
if (isMainViewSelected()) {
drawHistogram(ctx, rect, EvaluateHistogramAtAbscissa, m_store, &totalSize, m_store->firstDrawnBarAbscissa(), m_store->barWidth(), true, Palette::Select, Palette::YellowDark, m_highlightedBarStart, m_highlightedBarEnd);
} else {
drawHistogram(ctx, rect, EvaluateHistogramAtAbscissa, m_store, &totalSize, m_store->firstDrawnBarAbscissa(), m_store->barWidth(), true, Palette::GreyMiddle, Palette::YellowDark);
}
}
void HistogramView::setHighlight(float start, float end) {
if (m_highlightedBarStart != start || m_highlightedBarEnd != end) {
reload();
m_highlightedBarStart = start;
m_highlightedBarEnd = end;
reload();
}
}
char * HistogramView::label(Axis axis, int index) const {
if (axis == Axis::Vertical) {
return nullptr;
}
return (char *)m_labels[index];
}
float HistogramView::EvaluateHistogramAtAbscissa(float abscissa, void * model, void * context) {
Store * store = (Store *)model;
float * totalSize = (float *)context;
return store->heightOfBarAtValue(abscissa)/(*totalSize);
}
}
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