mirror of
https://github.com/UpsilonNumworks/Upsilon.git
synced 2026-03-21 06:40:37 +01:00
35 lines
1.9 KiB
C++
35 lines
1.9 KiB
C++
#include "graph_controller_helper.h"
|
|
#include "../../constant.h"
|
|
|
|
using namespace Shared;
|
|
using namespace Poincare;
|
|
|
|
namespace Graph {
|
|
|
|
bool GraphControllerHelper::privateMoveCursorHorizontally(Shared::CurveViewCursor * cursor, int direction, Shared::InteractiveCurveViewRange * range, int numberOfStepsInGradUnit, Shared::Function * function, Shared::TextFieldDelegateApp * app, float cursorTopMarginRatio, float cursorRightMarginRatio, float cursorBottomMarginRatio, float cursorLeftMarginRatio) {
|
|
double xCursorPosition = cursor->x();
|
|
double x = direction > 0 ? xCursorPosition + range->xGridUnit()/numberOfStepsInGradUnit : xCursorPosition - range->xGridUnit()/numberOfStepsInGradUnit;
|
|
double y = function->evaluateAtAbscissa(x, app->localContext());
|
|
cursor->moveTo(x, y);
|
|
range->panToMakePointVisible(x, y, cursorTopMarginRatio, cursorRightMarginRatio, cursorBottomMarginRatio, cursorLeftMarginRatio);
|
|
return true;
|
|
}
|
|
|
|
void GraphControllerHelper::reloadDerivativeInBannerViewForCursorOnFunction(Shared::CurveViewCursor * cursor, CartesianFunction * function, TextFieldDelegateApp * app) {
|
|
char buffer[FunctionBannerDelegate::k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
|
|
const char * space = " ";
|
|
int spaceLength = strlen(space);
|
|
const char * legend = "00(x)=";
|
|
int legendLength = strlen(legend);
|
|
int numberOfChar = strlcpy(buffer, legend, legendLength+1);
|
|
buffer[0] = function->name()[0];
|
|
buffer[1] = '\'';
|
|
double y = function->approximateDerivative(cursor->x(), app->localContext());
|
|
numberOfChar += PrintFloat::convertFloatToText<double>(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::ShortNumberOfSignificantDigits), Constant::ShortNumberOfSignificantDigits);
|
|
strlcpy(buffer+numberOfChar, space, spaceLength+1);
|
|
buffer[k_maxDigitLegendLength+6] = 0;
|
|
bannerView()->setLegendAtIndex(buffer, 2);
|
|
}
|
|
|
|
}
|