From e0774cba4b5ddd78bdca6d58c569cc9054848b8a Mon Sep 17 00:00:00 2001
From: Ruben Dashyan <ruben.dashyan@numworks.com>
Date: Tue, 2 Apr 2019 11:31:35 +0200
Subject: [PATCH] [apps/graph/graph] Define PreimageGraphController class

---
 apps/graph/Makefile                           |  1 +
 .../graph/graph/preimage_graph_controller.cpp | 29 +++++++++++++++++++
 apps/graph/graph/preimage_graph_controller.h  | 22 ++++++++++++++
 3 files changed, 52 insertions(+)
 create mode 100644 apps/graph/graph/preimage_graph_controller.cpp
 create mode 100644 apps/graph/graph/preimage_graph_controller.h

diff --git a/apps/graph/Makefile b/apps/graph/Makefile
index 5f8ea6f7e..9d5696b8e 100644
--- a/apps/graph/Makefile
+++ b/apps/graph/Makefile
@@ -12,6 +12,7 @@ app_src += $(addprefix apps/graph/,\
   graph/graph_controller.cpp \
   graph/graph_controller_helper.cpp \
   graph/graph_view.cpp \
+  graph/preimage_graph_controller.cpp\
   graph/integral_graph_controller.cpp \
   graph/intersection_graph_controller.cpp \
   graph/root_graph_controller.cpp \
diff --git a/apps/graph/graph/preimage_graph_controller.cpp b/apps/graph/graph/preimage_graph_controller.cpp
new file mode 100644
index 000000000..818de7210
--- /dev/null
+++ b/apps/graph/graph/preimage_graph_controller.cpp
@@ -0,0 +1,29 @@
+#include "preimage_graph_controller.h"
+
+namespace Graph {
+
+PreimageGraphController::PreimageGraphController(
+  Responder * parentResponder,
+  GraphView * graphView,
+  BannerView * bannerView,
+  Shared::InteractiveCurveViewRange * curveViewRange,
+  Shared::CurveViewCursor * cursor
+) :
+  CalculationGraphController(
+    parentResponder,
+    graphView,
+    bannerView,
+    curveViewRange,
+    cursor,
+    I18n::Message::NoPreimageFound
+  ),
+  m_image(NAN)
+{
+}
+
+Poincare::Expression::Coordinate2D PreimageGraphController::computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) {
+  Poincare::Expression expression = Poincare::Float<double>::Builder(m_image);
+  return functionStore()->modelForRecord(m_record)->nextIntersectionFrom(start, step, max, context, expression);
+}
+
+}
diff --git a/apps/graph/graph/preimage_graph_controller.h b/apps/graph/graph/preimage_graph_controller.h
new file mode 100644
index 000000000..995b06b0a
--- /dev/null
+++ b/apps/graph/graph/preimage_graph_controller.h
@@ -0,0 +1,22 @@
+#include "calculation_graph_controller.h"
+
+namespace Graph {
+
+class PreimageGraphController : public CalculationGraphController {
+public:
+  PreimageGraphController(
+    Responder * parentResponder,
+    GraphView * graphView,
+    BannerView * bannerView,
+    Shared::InteractiveCurveViewRange * curveViewRange,
+    Shared::CurveViewCursor * cursor
+  );
+  const char * title() override { return I18n::translate(I18n::Message::Preimage); }
+  double image() { return m_image; }
+  void setImage(double value) { m_image = value; }
+private:
+  Poincare::Expression::Coordinate2D computeNewPointOfInterest(double start, double step, double max, Poincare::Context * context) override;
+  double m_image;
+};
+
+}