6663b6c9
 adorian
projet complet av...
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#include "function_graph_controller.h"
#include "text_field_delegate_app.h"
#include <assert.h>
#include <cmath>
#include <float.h>
using namespace Poincare;
namespace Shared {
FunctionGraphController::FunctionGraphController(Responder * parentResponder, ButtonRowController * header, InteractiveCurveViewRange * interactiveRange, CurveView * curveView, CurveViewCursor * cursor, int * indexFunctionSelectedByCursor, uint32_t * modelVersion, uint32_t * rangeVersion, Expression::AngleUnit * angleUnitVersion) :
InteractiveCurveViewController(parentResponder, header, interactiveRange, curveView, cursor, modelVersion, rangeVersion),
m_initialisationParameterController(this, interactiveRange),
m_angleUnitVersion(angleUnitVersion),
m_indexFunctionSelectedByCursor(indexFunctionSelectedByCursor)
{
}
bool FunctionGraphController::isEmpty() const {
if (functionStore()->numberOfActiveFunctions() == 0) {
return true;
}
return false;
}
ViewController * FunctionGraphController::initialisationParameterController() {
return &m_initialisationParameterController;
}
void FunctionGraphController::viewWillAppear() {
functionGraphView()->setCursorView(cursorView());
functionGraphView()->setBannerView(bannerView());
functionGraphView()->setAreaHighlight(NAN,NAN);
if (functionGraphView()->context() == nullptr) {
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
functionGraphView()->setContext(myApp->localContext());
}
Expression::AngleUnit newAngleUnitVersion = Preferences::sharedPreferences()->angleUnit();
if (*m_angleUnitVersion != newAngleUnitVersion) {
*m_angleUnitVersion = newAngleUnitVersion;
initCursorParameters();
}
InteractiveCurveViewController::viewWillAppear();
}
bool FunctionGraphController::handleEnter() {
Function * f = functionStore()->activeFunctionAtIndex(indexFunctionSelectedByCursor());
curveParameterController()->setFunction(f);
StackViewController * stack = stackController();
stack->push(curveParameterController());
return true;
}
void FunctionGraphController::selectFunctionWithCursor(int functionIndex) {
*m_indexFunctionSelectedByCursor = functionIndex;
}
void FunctionGraphController::reloadBannerView() {
if (functionStore()->numberOfActiveFunctions() == 0) {
return;
}
Function * f = functionStore()->activeFunctionAtIndex(indexFunctionSelectedByCursor());
reloadBannerViewForCursorOnFunction(m_cursor, f, functionStore()->symbol());
}
InteractiveCurveViewRangeDelegate::Range FunctionGraphController::computeYRange(InteractiveCurveViewRange * interactiveCurveViewRange) {
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
float min = FLT_MAX;
float max = -FLT_MAX;
float xMin = interactiveCurveViewRange->xMin();
float xMax = interactiveCurveViewRange->xMax();
if (functionStore()->numberOfActiveFunctions() <= 0) {
InteractiveCurveViewRangeDelegate::Range range;
range.min = xMin;
range.max = xMax;
return range;
}
for (int i=0; i<functionStore()->numberOfActiveFunctions(); i++) {
Function * f = functionStore()->activeFunctionAtIndex(i);
float y = 0.0f;
float res = curveView()->resolution();
/* Scan x-range from the middle to the extrema in order to get balanced
* y-range for even functions (y = 1/x). */
for (int j = -res/2; j <= res/2; j++) {
float x = (xMin+xMax)/2.0+(xMax-xMin)*j/res;
y = f->evaluateAtAbscissa(x, myApp->localContext());
if (!std::isnan(y) && !std::isinf(y)) {
min = min < y ? min : y;
max = max > y ? max : y;
}
}
}
InteractiveCurveViewRangeDelegate::Range range;
range.min = min;
range.max = max;
return range;
}
void FunctionGraphController::initRangeParameters() {
interactiveCurveViewRange()->setDefault();
initCursorParameters();
selectFunctionWithCursor(0);
}
double FunctionGraphController::defaultCursorAbscissa() {
return (interactiveCurveViewRange()->xMin()+interactiveCurveViewRange()->xMax())/2.0f;
}
void FunctionGraphController::initCursorParameters() {
double x = defaultCursorAbscissa();
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
int functionIndex = 0;
double y = 0;
do {
Function * firstFunction = functionStore()->activeFunctionAtIndex(functionIndex++);
y = firstFunction->evaluateAtAbscissa(x, myApp->localContext());
} while ((std::isnan(y) || std::isinf(y)) && functionIndex < functionStore()->numberOfActiveFunctions());
m_cursor->moveTo(x, y);
functionIndex = (std::isnan(y) || std::isinf(y)) ? 0 : functionIndex - 1;
selectFunctionWithCursor(functionIndex);
interactiveCurveViewRange()->panToMakePointVisible(x, y, k_displayTopMarginRatio, k_cursorRightMarginRatio, k_displayBottomMarginRatio, k_cursorLeftMarginRatio);
}
bool FunctionGraphController::moveCursorVertically(int direction) {
Function * actualFunction = functionStore()->activeFunctionAtIndex(indexFunctionSelectedByCursor());
TextFieldDelegateApp * myApp = (TextFieldDelegateApp *)app();
double y = actualFunction->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
Function * nextFunction = actualFunction;
double nextY = direction > 0 ? DBL_MAX : -DBL_MAX;
for (int i = 0; i < functionStore()->numberOfActiveFunctions(); i++) {
Function * f = functionStore()->activeFunctionAtIndex(i);
double newY = f->evaluateAtAbscissa(m_cursor->x(), myApp->localContext());
bool isNextFunction = direction > 0 ? (newY > y && newY < nextY) : (newY < y && newY > nextY);
if (isNextFunction) {
selectFunctionWithCursor(i);
nextY = newY;
nextFunction = f;
}
}
if (nextFunction == actualFunction) {
return false;
}
m_cursor->moveTo(m_cursor->x(), nextY);
interactiveCurveViewRange()->panToMakePointVisible(m_cursor->x(), m_cursor->y(), k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
return true;
}
CurveView * FunctionGraphController::curveView() {
return functionGraphView();
}
uint32_t FunctionGraphController::modelVersion() {
return functionStore()->storeChecksum();
}
uint32_t FunctionGraphController::rangeVersion() {
return interactiveCurveViewRange()->rangeChecksum();
}
bool FunctionGraphController::isCursorVisible() {
return interactiveCurveViewRange()->isCursorVisible(k_cursorTopMarginRatio, k_cursorRightMarginRatio, k_cursorBottomMarginRatio, k_cursorLeftMarginRatio);
}
}
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