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https://github.com/UpsilonNumworks/Upsilon.git
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61 lines
2.9 KiB
C++
61 lines
2.9 KiB
C++
#include "graph_controller_helper.h"
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#include "../../shared/function_banner_delegate.h"
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#include "../app.h"
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#include "../../shared/poincare_helpers.h"
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#include <poincare/preferences.h>
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using namespace Shared;
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using namespace Poincare;
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namespace Graph {
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static inline double minDouble(double x, double y) { return x < y ? x : y; }
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static inline double maxDouble(double x, double y) { return x > y ? x : y; }
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bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Ion::Storage::Record record, bool fast) {
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ExpiringPointer<ContinuousFunction> function = App::app()->functionStore()->modelForRecord(record);
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double tCursorPosition = cursor->t();
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double t = tCursorPosition;
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double tMin = function->tMin();
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double tMax = function->tMax();
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int functionsCount = -1;
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if (((direction > 0 && std::abs(t-tMax) < DBL_EPSILON)
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|| (direction < 0 && std::abs(t-tMin) < DBL_EPSILON))
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&& !App::app()->functionStore()->displaysNonCartesianFunctions(&functionsCount))
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{
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jumpToLeftRightCurve(t, direction, functionsCount, record);
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return true;
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}
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function = App::app()->functionStore()->modelForRecord(record); // Reload the expiring pointer
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double dir = (direction > 0 ? 1.0 : -1.0);
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double step = function->plotType() == ContinuousFunction::PlotType::Cartesian ? range->xGridUnit()/numberOfStepsInGradUnit : (tMax-tMin)/k_definitionDomainDivisor;
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if (fast) {
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// TODO Navigate quicker the longer the user presses? (slow start)
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step *= 5.0;
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}
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t += dir * step;
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t = maxDouble(tMin, minDouble(tMax, t));
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Coordinate2D<double> xy = function->evaluateXYAtParameter(t, App::app()->localContext());
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cursor->moveTo(t, xy.x1(), xy.x2());
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return true;
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}
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void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, Ion::Storage::Record record) {
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ExpiringPointer<ContinuousFunction> function = App::app()->functionStore()->modelForRecord(record);
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constexpr size_t bufferSize = FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::charSizeForFloatsWithPrecision(Preferences::LargeNumberOfSignificantDigits);
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char buffer[bufferSize];
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const char * space = " ";
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int numberOfChar = function->derivativeNameWithArgument(buffer, bufferSize);
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const char * legend = "=";
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assert(numberOfChar <= bufferSize);
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numberOfChar += strlcpy(buffer+numberOfChar, legend, bufferSize-numberOfChar);
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double y = function->approximateDerivative(cursor->x(), App::app()->localContext());
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numberOfChar += PoincareHelpers::ConvertFloatToText<double>(y, buffer + numberOfChar, bufferSize-numberOfChar, Preferences::ShortNumberOfSignificantDigits);
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assert(numberOfChar <= bufferSize);
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strlcpy(buffer+numberOfChar, space, bufferSize-numberOfChar);
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bannerView()->derivativeView()->setText(buffer);
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bannerView()->reload();
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}
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}
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