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73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
#include "histogram_view.h"
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#include "histogram_controller.h"
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#include <assert.h>
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#include <cmath>
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using namespace Shared;
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namespace Statistics {
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HistogramView::HistogramView(HistogramController * controller, Store * store, int series, Shared::BannerView * bannerView, KDColor selectedHistogramColor, KDColor notSelectedHistogramColor, KDColor selectedBarColor) :
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HorizontallyLabeledCurveView(store, nullptr, bannerView, nullptr),
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m_controller(controller),
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m_store(store),
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m_highlightedBarStart(NAN),
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m_highlightedBarEnd(NAN),
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m_series(series),
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m_selectedHistogramColor(selectedHistogramColor),
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m_notSelectedHistogramColor(notSelectedHistogramColor),
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m_selectedBarColor(selectedBarColor),
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m_displayLabels(true)
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{
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}
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void HistogramView::reload() {
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CurveView::reload();
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markRectAsDirty(bounds());
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}
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void HistogramView::reloadSelectedBar() {
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CurveView::reload();
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float pixelLowerBound = floatToPixel(Axis::Horizontal, m_highlightedBarStart)-2;
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float pixelUpperBound = floatToPixel(Axis::Horizontal, m_highlightedBarEnd)+2;
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/* We deliberately do not mark as dirty the frame of the banner view to avoid
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*unpleasant blinking of the drawing of the banner view. */
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KDRect dirtyZone(KDRect(pixelLowerBound, 0, pixelUpperBound-pixelLowerBound,
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bounds().height()));
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markRectAsDirty(dirtyZone);
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}
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void HistogramView::drawRect(KDContext * ctx, KDRect rect) const {
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m_controller->setCurrentDrawnSeries(m_series);
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ctx->fillRect(rect, Palette::BackgroundHard);
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drawAxis(ctx, rect, Axis::Horizontal);
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drawLabelsAndGraduations(ctx, rect, Axis::Horizontal, false, !m_displayLabels);
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/* We memoize the total size to avoid recomputing it in double precision at
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* every call to EvaluateHistogramAtAbscissa() */
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float totalSize = m_store->sumOfOccurrences(m_series);
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float context[] = {totalSize, static_cast<float>(m_series)};
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if (isMainViewSelected()) {
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drawHistogram(ctx, rect, EvaluateHistogramAtAbscissa, m_store, context, m_store->firstDrawnBarAbscissa(), m_store->barWidth(), true, m_selectedHistogramColor, m_selectedBarColor, m_highlightedBarStart, m_highlightedBarEnd);
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} else {
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drawHistogram(ctx, rect, EvaluateHistogramAtAbscissa, m_store, context, m_store->firstDrawnBarAbscissa(), m_store->barWidth(), true, m_notSelectedHistogramColor, m_selectedBarColor);
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}
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}
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void HistogramView::setHighlight(float start, float end) {
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if (m_highlightedBarStart != start || m_highlightedBarEnd != end) {
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reloadSelectedBar();
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m_highlightedBarStart = start;
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m_highlightedBarEnd = end;
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reloadSelectedBar();
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}
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}
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float HistogramView::EvaluateHistogramAtAbscissa(float abscissa, void * model, void * context) {
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Store * store = (Store *)model;
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float totalSize = ((float *)context)[0];
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int series = ((float *)context)[1];
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return store->heightOfBarAtValue(series, abscissa)/(totalSize);
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}
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}
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