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We memoize the checksum of the x first models, and we check that one of these models is still present when the graph view appears. If so, we do not reload the range, other wise we reload it. Scenario: f(t) = [t^2 t+1] in parametric Display the graph f(x) = 1 on ]-inf;0] g(x) = 2 on [0;inf[ Display the graph -> the range did not change
65 lines
2.9 KiB
C++
65 lines
2.9 KiB
C++
#ifndef SHARED_FUNCTION_GRAPH_CONTROLLER_H
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#define SHARED_FUNCTION_GRAPH_CONTROLLER_H
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#include <escher.h>
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#include "initialisation_parameter_controller.h"
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#include "function_banner_delegate.h"
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#include "interactive_curve_view_controller.h"
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#include "function_store.h"
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#include "function_graph_view.h"
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#include "function_curve_parameter_controller.h"
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namespace Shared {
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class FunctionGraphController : public InteractiveCurveViewController, public FunctionBannerDelegate {
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public:
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static constexpr size_t sNumberOfMemoizedModelVersions = 5;
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FunctionGraphController(Responder * parentResponder, InputEventHandlerDelegate * inputEventHandlerDelegate, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * previousModelsVersions, uint32_t * rangeVersion, Poincare::Preferences::AngleUnit * angleUnitVersion);
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bool isEmpty() const override;
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ViewController * initialisationParameterController() override;
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void didBecomeFirstResponder() override;
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void viewWillAppear() override;
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protected:
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float cursorTopMarginRatio() override { return 0.068f; }
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void reloadBannerView() override;
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bool handleEnter() override;
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int indexFunctionSelectedByCursor() const { return *m_indexFunctionSelectedByCursor; }
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virtual void selectFunctionWithCursor(int functionIndex);
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virtual double defaultCursorT(Ion::Storage::Record record);
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virtual FunctionStore * functionStore() const;
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// Closest vertical curve helper
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virtual int nextCurveIndexVertically(bool goingUp, int currentSelectedCurve, Poincare::Context * context) const {
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return closestCurveIndexVertically(goingUp, currentSelectedCurve, context);
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}
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bool closestCurveIndexIsSuitable(int newIndex, int currentIndex) const override;
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int selectedCurveIndex() const override { return *m_indexFunctionSelectedByCursor; }
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Poincare::Coordinate2D<double> xyValues(int curveIndex, double t, Poincare::Context * context) const override;
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int numberOfCurves() const override;
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void initCursorParameters() override;
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CurveView * curveView() override;
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private:
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virtual FunctionGraphView * functionGraphView() = 0;
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virtual FunctionCurveParameterController * curveParameterController() = 0;
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// InteractiveCurveViewRangeDelegate
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InteractiveCurveViewRangeDelegate::Range computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) override;
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// InteractiveCurveViewController
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bool moveCursorVertically(int direction) override;
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uint32_t modelVersion() override;
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uint32_t modelVersionAtIndex(size_t i) override;
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uint32_t rangeVersion() override;
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size_t numberOfMemoizedVersions() const override { return sNumberOfMemoizedModelVersions; }
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InitialisationParameterController m_initialisationParameterController;
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Poincare::Preferences::AngleUnit * m_angleUnitVersion;
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int * m_indexFunctionSelectedByCursor;
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};
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}
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#endif
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