curve_view.h
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#ifndef SHARED_CURVE_VIEW_H
#define SHARED_CURVE_VIEW_H
#include <escher.h>
#include <poincare.h>
#include <cmath>
#include "curve_view_range.h"
#include "curve_view_cursor.h"
#include "banner_view.h"
namespace Shared {
class CurveView : public View {
public:
typedef float (*EvaluateModelWithParameter)(float t, void * model, void * context);
enum class Axis {
Horizontal = 0,
Vertical = 1
};
CurveView(CurveViewRange * curveViewRange = nullptr, CurveViewCursor * curveViewCursor = nullptr,
BannerView * bannerView = nullptr, View * cursorView = nullptr, View * okView = nullptr);
virtual void reload();
// When the main view is selected, the banner view is visible
bool isMainViewSelected() const;
void selectMainView(bool mainViewSelected);
void setCursorView(View * cursorView);
void setBannerView(View * bannerView);
void setOkView(View * okView);
float resolution() const;
protected:
void setCurveViewRange(CurveViewRange * curveViewRange);
// Drawing methods
virtual float samplingRatio() const;
constexpr static KDCoordinate k_labelMargin = 4;
constexpr static KDCoordinate k_okMargin = 10;
constexpr static KDCoordinate k_labelGraduationLength = 6;
constexpr static int k_maxNumberOfXLabels = CurveViewRange::k_maxNumberOfXGridUnits;
constexpr static int k_maxNumberOfYLabels = CurveViewRange::k_maxNumberOfYGridUnits;
constexpr static int k_externRectMargin = 2;
float pixelToFloat(Axis axis, KDCoordinate p) const;
float floatToPixel(Axis axis, float f) const;
void drawLine(KDContext * ctx, KDRect rect, Axis axis,
float coordinate, KDColor color, KDCoordinate thickness = 1) const;
void drawSegment(KDContext * ctx, KDRect rect, Axis axis,
float coordinate, float lowerBound, float upperBound,
KDColor color, KDCoordinate thickness = 1) const;
void drawDot(KDContext * ctx, KDRect rect, float x, float y, KDColor color, bool oversize = false) const;
void drawGridLines(KDContext * ctx, KDRect rect, Axis axis, float step, KDColor color) const;
void drawGrid(KDContext * ctx, KDRect rect) const;
void drawAxes(KDContext * ctx, KDRect rect, Axis axis) const;
void drawCurve(KDContext * ctx, KDRect rect, EvaluateModelWithParameter evaluation, void * model, void * context, KDColor color, bool colorUnderCurve = false, float colorLowerBound = 0.0f, float colorUpperBound = 0.0f, bool continuously = false) const;
void drawHistogram(KDContext * ctx, KDRect rect, EvaluateModelWithParameter evaluation, void * model, void * context, float firstBarAbscissa, float barWidth,
bool fillBar, KDColor defaultColor, KDColor highlightColor, float highlightLowerBound = INFINITY, float highlightUpperBound = -INFINITY) const;
void computeLabels(Axis axis);
void drawLabels(KDContext * ctx, KDRect rect, Axis axis, bool shiftOrigin) const;
View * m_bannerView;
CurveViewCursor * m_curveViewCursor;
private:
/* The window bounds are deduced from the model bounds but also take into
account a margin (computed with k_marginFactor) */
float min(Axis axis) const;
float max(Axis axis) const;
float gridUnit(Axis axis) const;
KDCoordinate pixelLength(Axis axis) const;
virtual char * label(Axis axis, int index) const = 0;
int numberOfLabels(Axis axis) const;
/* Recursively join two dots (dichotomy). The method stops when the
* maxNumberOfRecursion in reached. */
void jointDots(KDContext * ctx, KDRect rect, EvaluateModelWithParameter evaluation, void * model, void * context, float x, float y, float u, float v, KDColor color, int maxNumberOfRecursion) const;
/* Join two dots with a straight line. */
void straightJoinDots(KDContext * ctx, KDRect rect, float pxf, float pyf, float puf, float pvf, KDColor color) const;
/* Stamp centered around (pxf, pyf). If pxf and pyf are not round number, the
* function shifts the stamp (by blending adjacent pixel colors) to draw with
* anti alising. */
void stampAtLocation(KDContext * ctx, KDRect rect, float pxf, float pyf, KDColor color) const;
void layoutSubviews() override;
KDRect cursorFrame();
KDRect bannerFrame();
KDRect okFrame();
int numberOfSubviews() const override;
View * subviewAtIndex(int index) override;
/* m_curveViewRange has to be non null but the cursor model, the banner and
* cursor views may be nullptr if not needed. */
CurveViewRange * m_curveViewRange;
View * m_cursorView;
View * m_okView;
bool m_mainViewSelected;
uint32_t m_drawnRangeVersion;
};
}
#endif