[apps/sequence/graph] Create a class vertical cursor view

Change-Id: I0fb7c4f5258442956f724fb6819e8179165e836a

apps/sequence/Makefile

@@ -5,6 +5,7 @@ app_objs += $(addprefix apps/sequence/,\
   graph/curve_view_range.o\
   graph/graph_controller.o\
   graph/graph_view.o\
+  graph/vertical_cursor_view.o\
   list/list_controller.o\
   list/list_parameter_controller.o\
   list/sequence_toolbox.o\

apps/sequence/graph/vertical_cursor_view.cpp

@@ -0,0 +1,10 @@
+#include "vertical_cursor_view.h"
+
+namespace Sequence {
+
+void VerticalCursorView::drawRect(KDContext * ctx, KDRect rect) const {
+  KDCoordinate height = bounds().height();
+  ctx->fillRect(KDRect(0, 0, 1, height), KDColorBlack);
+}
+
+}

apps/sequence/graph/vertical_cursor_view.h

@@ -0,0 +1,16 @@
+#ifndef SEQUENCE_VERTICAL_CURSOR_VIEW_H
+#define SEQUENCE_VERTICAL_CURSOR_VIEW_H
+
+#include <escher.h>
+
+namespace Sequence {
+
+class VerticalCursorView : public View {
+public:
+  using View::View;
+  void drawRect(KDContext * ctx, KDRect rect) const override;
+};
+
+}
+
+#endif