function_go_to_parameter_controller.cpp
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#include "function_go_to_parameter_controller.h"
#include "text_field_delegate_app.h"
#include <assert.h>
#include <cmath>
namespace Shared {
FunctionGoToParameterController::FunctionGoToParameterController(Responder * parentResponder, InteractiveCurveViewRange * graphRange, CurveViewCursor * cursor, I18n::Message symbol) :
GoToParameterController(parentResponder, graphRange, cursor, symbol),
m_function(nullptr)
{
}
const char * FunctionGoToParameterController::title() {
return I18n::translate(I18n::Message::Goto);
}
double FunctionGoToParameterController::parameterAtIndex(int index) {
assert(index == 0);
return m_cursor->x();
}
bool FunctionGoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
assert(parameterIndex == 0);
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
float y = m_function->evaluateAtAbscissa(f, myApp->localContext());
if (std::fabs(f) > k_maxDisplayableFloat || std::fabs(y) > k_maxDisplayableFloat) {
app()->displayWarning(I18n::Message::ForbiddenValue);
return false;
}
if (std::isnan(y) || std::isinf(y)) {
app()->displayWarning(I18n::Message::ValueNotReachedByFunction);
return false;
}
m_cursor->moveTo(f, y);
m_graphRange->centerAxisAround(CurveViewRange::Axis::X, m_cursor->x());
m_graphRange->centerAxisAround(CurveViewRange::Axis::Y, m_cursor->y());
return true;
}
void FunctionGoToParameterController::setFunction(Function * function) {
m_function = function;
}
}