[apps/graph] Make graph window inherit from window curve view with

cursor

Change-Id: Ib787e5175e74c41b08bda59d25740a83f726146f

apps/graph/graph/graph_window.cpp

@@ -8,6 +8,7 @@
 namespace Graph {
 
 GraphWindow::GraphWindow(FunctionStore * functionStore) :
+  CurveViewWindowWithCursor(),
   m_xMin(-10.0f),
   m_xMax(10.0f),
   m_yMin(-10.0f),
@@ -15,8 +16,6 @@ GraphWindow::GraphWindow(FunctionStore * functionStore) :
   m_yAuto(true),
   m_xGridUnit(2.0f),
   m_yGridUnit(2.0f),
-  m_xCursorPosition(NAN),
-  m_yCursorPosition(NAN),
   m_indexFunctionSelectedByCursor(0),
   m_functionStore(functionStore),
   m_context(nullptr)
@@ -199,14 +198,6 @@ void GraphWindow::setDefault() {
   setYAuto(true);
 }
 
-float GraphWindow::xCursorPosition() {
-  return m_xCursorPosition;
-}
-
-float GraphWindow::yCursorPosition() {
-  return m_yCursorPosition;
-}
-
 float GraphWindow::derivativeAtCursorPosition() {
   Function * f = m_functionStore->activeFunctionAtIndex(m_indexFunctionSelectedByCursor);
   return f->approximateDerivative(m_xCursorPosition, m_context);

apps/graph/graph/graph_window.h

@@ -2,11 +2,11 @@
 #define GRAPH_GRAPH_AXIS_INTERVAL_H
 
 #include "../function_store.h"
-#include "../../curve_view_window.h"
+#include "../../curve_view_window_with_cursor.h"
 
 namespace Graph {
 
-class GraphWindow : public CurveViewWindow {
+class GraphWindow : public CurveViewWindowWithCursor {
 public:
   enum class Direction {
     Up,
@@ -38,8 +38,6 @@ public:
   void roundAbscissa();
   void normalize();
   void setDefault();
-  float xCursorPosition();
-  float yCursorPosition();
   float derivativeAtCursorPosition();
   Function * functionSelectedByCursor();
   void setCursorPositionAtAbscissaWithFunction(float abscissa, Function * function);
@@ -60,8 +58,6 @@ private:
   bool m_yAuto;
   float m_xGridUnit;
   float m_yGridUnit;
-  float m_xCursorPosition;
-  float m_yCursorPosition;
   int m_indexFunctionSelectedByCursor;
   FunctionStore * m_functionStore;
   Context * m_context;