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[apps] Graph: change banner view when displaying Tangent in graph view

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This commit is contained in:
Émilie Feral
2018-01-08 17:44:33 +01:00
committed by EmilieNumworks
parent f19e31f4cd
commit d1808ae26f
8 changed files with 80 additions and 39 deletions
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56
apps/graph/graph/graph_controller.cpp
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@@ -12,7 +12,8 @@ GraphController::GraphController(Responder * parentResponder, CartesianFunctionS
m_view(functionStore, curveViewRange, m_cursor, &m_bannerView, &m_cursorView),
m_graphRange(curveViewRange),
m_curveParameterController(curveViewRange, &m_bannerView, m_cursor, this),
m_functionStore(functionStore)
m_functionStore(functionStore),
m_displayDerivativeInBanner(false)
{
m_graphRange->setDelegate(this);
}
@@ -56,6 +57,14 @@ void GraphController::setType(GraphView::Type t) {
}
}
bool GraphController::displayDerivativeInBanner() const {
return m_displayDerivativeInBanner;
}
void GraphController::setDisplayDerivativeInBanner(bool displayDerivative) {
m_displayDerivativeInBanner = displayDerivative;
}
GraphView::Type GraphController::type() const {
return m_view.type();
}
@@ -65,25 +74,46 @@ BannerView * GraphController::bannerView() {
}
void GraphController::reloadBannerView() {
// TODO: do something else if type() == GraphView::Type::tangent
FunctionGraphController::reloadBannerView();
if (!m_bannerView.displayDerivative()) {
return;
m_bannerView.setNumberOfSubviews(2+m_displayDerivativeInBanner);
if (type() == GraphView::Type::Tangent) {
m_bannerView.setNumberOfSubviews(6);
}
char buffer[k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
const char * legend = "00(x)=";
int legendLength = strlen(legend);
strlcpy(buffer, legend, legendLength+1);
if (m_functionStore->numberOfActiveFunctions() == 0) {
return;
}
CartesianFunction * f = m_functionStore->activeFunctionAtIndex(m_indexFunctionSelectedByCursor);
buffer[0] = f->name()[0];
buffer[1] = '\'';
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
double y = f->approximateDerivative(m_cursor->x(), myApp->localContext());
Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
m_bannerView.setLegendAtIndex(buffer, 2);
char buffer[k_maxNumberOfCharacters+PrintFloat::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits)];
const char * space = " ";
int spaceLength = strlen(space);
if (m_displayDerivativeInBanner || type() == GraphView::Type::Tangent) {
const char * legend = "00(x)=";
int legendLength = strlen(legend);
int numberOfChar = strlcpy(buffer, legend, legendLength+1);
buffer[0] = f->name()[0];
buffer[1] = '\'';
double y = f->approximateDerivative(m_cursor->x(), myApp->localContext());
numberOfChar += Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
strlcpy(buffer+numberOfChar, space, spaceLength+1);
buffer[k_maxLegendLength] = 0;
m_bannerView.setLegendAtIndex(buffer, 2);
}
if (type() == GraphView::Type::Tangent) {
const char * legend = "a=";
int legendLength = strlen(legend);
strlcpy(buffer, legend, legendLength+1);
double y = f->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()+f->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
Complex<double>::convertFloatToText(y, buffer + legendLength, PrintFloat::bufferSizeForFloatsWithPrecision(Constant::MediumNumberOfSignificantDigits), Constant::MediumNumberOfSignificantDigits);
m_bannerView.setLegendAtIndex(buffer, 5);
}
}
bool GraphController::moveCursorHorizontally(int direction) {