Files
Upsilon/apps/shared/storage_function_banner_delegate.h
2018-11-23 12:04:00 +01:00

50 lines
1.9 KiB
C++

#ifndef SHARED_STORAGE_FUNCTION_BANNER_DELEGATE_H
#define SHARED_STORAGE_FUNCTION_BANNER_DELEGATE_H
#include "banner_view.h"
#include "curve_view_cursor.h"
#include "poincare_helpers.h"
#include "../constant.h"
namespace Shared {
template<class T>
class StorageFunctionBannerDelegate {
public:
constexpr static int k_maxNumberOfCharacters = 50;
constexpr static int k_maxDigitLegendLength = 11;
protected:
void reloadBannerViewForCursorOnFunction(CurveViewCursor * cursor, T * function, char symbol) {
char buffer[k_maxNumberOfCharacters+Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
const char * space = " ";
int spaceLength = strlen(space);
const char * legend = "0=";
int legendLength = strlen(legend);
int numberOfChar = 0;
strlcpy(buffer, legend, legendLength+1);
numberOfChar += legendLength;
buffer[0] = symbol;
numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->x(), buffer+numberOfChar, Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
strlcpy(buffer+numberOfChar, space, spaceLength+1);
buffer[k_maxDigitLegendLength+2] = 0;
bannerView()->setLegendAtIndex(buffer, 0);
numberOfChar = 0;
legend = "0(x)=";
legendLength = strlen(legend);
numberOfChar += legendLength;
strlcpy(buffer, legend, legendLength+1);
buffer[2] = symbol;
buffer[0] = function->name()[0];
numberOfChar += PoincareHelpers::ConvertFloatToText<double>(cursor->y(), buffer+legendLength, Poincare::PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
strlcpy(buffer+numberOfChar, space, spaceLength+1);
buffer[k_maxDigitLegendLength+5] = 0;
bannerView()->setLegendAtIndex(buffer, 1);
}
virtual BannerView * bannerView() = 0;
};
}
#endif