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40 lines
1.7 KiB
C++
40 lines
1.7 KiB
C++
#ifndef GRAPH_GRAPH_VIEW_H
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#define GRAPH_GRAPH_VIEW_H
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#include "../../shared/function_graph_view.h"
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namespace Graph {
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class GraphView : public Shared::FunctionGraphView {
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public:
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/* The step is a fraction of tmax-tmin. We will evaluate the function at
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* every step and if the consecutive dots are close enough, we won't
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* evaluate any more dot within the step. We pick a very strange fraction
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* denominator to avoid evaluating a periodic function periodically. For
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* example, if tstep was (tmax - tmin)/10, the polar function r(θ) = sin(5θ)
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* defined on 0..2π would be evaluated on r(0) = 0, r(π/5) = 0, r(2*π/5) = 0
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* which would lead to no curve at all. With 10.0938275501223, the
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* problematic functions are the functions whose period is proportionned to
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* 10.0938275501223 which are hopefully rare enough.
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* TODO: The drawCurve algorithm should use the derivative function to know
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* how fast the function moves... */
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static constexpr float k_graphStepDenominator = 10.0938275501223f;
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GraphView(Shared::InteractiveCurveViewRange * graphRange,
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Shared::CurveViewCursor * cursor, Shared::BannerView * bannerView, Shared::CursorView * cursorView);
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void reload() override;
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void drawRect(KDContext * ctx, KDRect rect) const override;
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void drawTangent(bool tangent) { m_tangent = tangent; }
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/* We override setAreaHighlightColor to make it reload nothing as the
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* highlightColor and the non-highlightColor are identical in the graph view
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* of the application graph. We thereby avoid to uselessly reload some part
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* of the graph where the area under the curve is colored. */
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void setAreaHighlightColor(bool highlightColor) override {};
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private:
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bool m_tangent;
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};
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}
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#endif
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