[solver] Add a modal with equation models when adding a new equation

apps/solver/equation_models_parameter_controller.cpp

@@ -0,0 +1,106 @@
+#include "equation_models_parameter_controller.h"
+#include <assert.h>
+#include <poincare/layout_engine.h>
+#include "../i18n.h"
+
+using namespace Poincare;
+
+namespace Solver {
+
+constexpr const char * EquationModelsParameterController::k_models[k_numberOfModels];
+
+EquationModelsParameterController::EquationModelsParameterController(Responder * parentResponder, EquationStore * equationStore) :
+  ViewController(parentResponder),
+  m_emptyModelCell(I18n::Message::Empty, KDText::FontSize::Large),
+  m_expressionLayouts{},
+  m_selectableTableView(this),
+  m_equationStore(equationStore)
+{
+  m_selectableTableView.setMargins(0);
+  m_selectableTableView.setShowsIndicators(false);
+  for (int i = 0; i < k_numberOfExpressionCells; i++) {
+    Poincare::Expression * e = Expression::parse(k_models[i+1]);
+    m_expressionLayouts[i] = e->createLayout(Poincare::PrintFloat::Mode::Decimal, Poincare::Expression::ComplexFormat::Cartesian);
+    delete e;
+    m_modelCells[i].setExpressionLayout(m_expressionLayouts[i]);
+  }
+}
+
+EquationModelsParameterController::~EquationModelsParameterController() {
+  for (int i = 0; i < k_numberOfExpressionCells; i++) {
+    if (m_expressionLayouts[i]) {
+      delete m_expressionLayouts[i];
+      m_expressionLayouts[i] = nullptr;
+    }
+  }
+}
+
+const char * EquationModelsParameterController::title() {
+  return I18n::translate(I18n::Message::UseEquationModel);
+}
+
+View * EquationModelsParameterController::view() {
+  return &m_selectableTableView;
+}
+
+void EquationModelsParameterController::viewWillAppear() {
+  ViewController::viewWillAppear();
+  selectCellAtLocation(0, 0);
+}
+
+void EquationModelsParameterController::didBecomeFirstResponder() {
+  app()->setFirstResponder(&m_selectableTableView);
+}
+
+bool EquationModelsParameterController::handleEvent(Ion::Events::Event event) {
+  if (event == Ion::Events::OK || event == Ion::Events::EXE) {
+    Equation * newEquation = static_cast<Equation *>(m_equationStore->addEmptyModel());
+    newEquation->setContent(k_models[selectedRow()]);
+    app()->dismissModalViewController();
+    return true;
+  }
+  return false;
+}
+
+int EquationModelsParameterController::numberOfRows() {
+  return k_numberOfExpressionCells+1;
+};
+
+KDCoordinate EquationModelsParameterController::rowHeight(int j) {
+  return Metric::ToolboxRowHeight;
+}
+
+KDCoordinate EquationModelsParameterController::cumulatedHeightFromIndex(int j) {
+  return rowHeight(0) * j;
+}
+
+int EquationModelsParameterController::indexFromCumulatedHeight(KDCoordinate offsetY) {
+  KDCoordinate height = rowHeight(0);
+  if (height == 0) {
+    return 0;
+  }
+  return (offsetY - 1) / height;
+}
+
+HighlightCell * EquationModelsParameterController::reusableCell(int index, int type) {
+  if (type == 0) {
+    return &m_emptyModelCell;
+  }
+  return &m_modelCells[index];
+}
+
+int EquationModelsParameterController::reusableCellCount(int type) {
+  if (type == 0) {
+    return 1;
+  }
+  return k_numberOfExpressionCells;
+}
+
+int EquationModelsParameterController::typeAtLocation(int i, int j) {
+  if (i == 0 && j == 0) {
+    return 0;
+  }
+  return 1;
+}
+
+}