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[apps/graph] fix banner view for polar and parametric

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This commit is contained in:
Léa Saviot
2019-08-30 15:04:27 +02:00
parent 2071a65d43
commit fa413edc61
9 changed files with 38 additions and 8 deletions
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18
apps/shared/cartesian_function.cpp
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@@ -145,6 +145,24 @@ void CartesianFunction::setDisplayDerivative(bool display) {
return recordData()->setDisplayDerivative(display);
}
int CartesianFunction::printValue(double cursorT, double cursorX, double cursorY, char * buffer, int bufferSize, int precision, Poincare::Context * context) {
PlotType type = plotType();
if (type == PlotType::Cartesian) {
return Function::printValue(cursorT, cursorX, cursorY, buffer, bufferSize, precision, context);
}
if (type == PlotType::Polar) {
return PoincareHelpers::ConvertFloatToText<double>(evaluate2DAtParameter(cursorT, context).x2(), buffer, bufferSize, precision);
}
assert(type == PlotType::Parametric);
int result = 0;
result += UTF8Decoder::CodePointToChars('(', buffer+result, bufferSize-result);
result += PoincareHelpers::ConvertFloatToText<double>(cursorX, buffer+result, bufferSize-result, precision);
result += UTF8Decoder::CodePointToChars(';', buffer+result, bufferSize-result);
result += PoincareHelpers::ConvertFloatToText<double>(cursorY, buffer+result, bufferSize-result, precision);
result += UTF8Decoder::CodePointToChars(')', buffer+result, bufferSize-result);
return result;
}
double CartesianFunction::approximateDerivative(double x, Poincare::Context * context) const {
Poincare::Derivative derivative = Poincare::Derivative::Builder(expressionReduced(context).clone(), Symbol::Builder(UCodePointUnknownX), Poincare::Float<double>::Builder(x)); // derivative takes ownership of Poincare::Float<double>::Builder(x) and the clone of expression
/* TODO: when we approximate derivative, we might want to simplify the