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[apps] Graph: redesign TangentGraphController implementation: use

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different controller with common parent class
This commit is contained in:
Émilie Feral
2018-01-09 15:50:39 +01:00
committed by EmilieNumworks
parent 7ce68d0a11
commit 5c64f76735
11 changed files with 126 additions and 90 deletions
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65
apps/graph/graph/tangent_graph_controller.cpp Normal file
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#include "tangent_graph_controller.h"
#include "../app.h"
using namespace Shared;
using namespace Poincare;
namespace Graph {
TangentGraphController::TangentGraphController(Responder * parentResponder, GraphView * graphView, BannerView * bannerView, Shared::InteractiveCurveViewRange * curveViewRange, CurveViewCursor * cursor) :
SimpleInteractiveCurveViewController(parentResponder, curveViewRange, graphView, cursor),
m_graphView(graphView),
m_bannerView(bannerView),
m_graphRange(curveViewRange),
m_function(nullptr)
{
}
const char * TangentGraphController::title() {
return I18n::translate(I18n::Message::Tangent);
}
void TangentGraphController::viewWillAppear() {
m_graphRange->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
m_graphView->setType(GraphView::Type::Tangent);
m_graphView->setOkView(nullptr);
m_graphView->selectMainView(true);
reloadBannerView();
m_graphView->reload();
}
void TangentGraphController::setFunction(CartesianFunction * function) {
m_graphView->selectFunction(function);
m_function = function;
}
void TangentGraphController::reloadBannerView() {
m_bannerView->setNumberOfSubviews(6);
if (m_function == nullptr) {
return;
}
FunctionBannerDelegate::reloadBannerViewForCursorOnFunction(m_cursor, m_function, 'x');
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(m_cursor, m_function, myApp);
char buffer[FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
const char * legend = "a=";
int legendLength = strlen(legend);
strlcpy(buffer, legend, legendLength+1);
double y = m_function->approximateDerivative(m_cursor->x(), myApp->localContext());
Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
m_bannerView->setLegendAtIndex(buffer, 4);
legend = "b=";
legendLength = strlen(legend);
strlcpy(buffer, legend, legendLength+1);
y = -y*m_cursor->x()+m_function->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
m_bannerView->setLegendAtIndex(buffer, 5);
}
bool TangentGraphController::moveCursorHorizontally(int direction) {
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
return privateMoveCursorHorizontally(m_cursor, direction, m_graphRange, k_numberOfCursorStepsInGradUnit, m_function, myApp, k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
}
}