diff --git a/apps/probability/calculation_controller.cpp b/apps/probability/calculation_controller.cpp
index 3ce66b908..e422a3884 100644
--- a/apps/probability/calculation_controller.cpp
+++ b/apps/probability/calculation_controller.cpp
@@ -212,11 +212,8 @@ bool CalculationController::textFieldShouldFinishEditing(TextField * textField,
 }
 
 bool CalculationController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  App * probaApp = (App *)app();
-  Context * globalContext = probaApp->container()->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if (m_calculation->type() != Calculation::Type::FiniteIntegral && selectedColumn() == 2) {
diff --git a/apps/sequence/list/list_parameter_controller.cpp b/apps/sequence/list/list_parameter_controller.cpp
index ac36094be..5674f4837 100644
--- a/apps/sequence/list/list_parameter_controller.cpp
+++ b/apps/sequence/list/list_parameter_controller.cpp
@@ -72,14 +72,11 @@ bool ListParameterController::textFieldDidFinishEditing(TextField * textField, c
   static float maxFirstIndex = std::pow(10.0f, Sequence::k_initialRankNumberOfDigits) - 1.0f;
   /* -1 to take into account a double recursive sequence, which has
    * SecondIndex = FirstIndex + 1 */
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  float floatBody = PoincareHelpers::ApproximateToScalar<float>(text, *globalContext);
-  int index = std::round(floatBody);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
+  int index = std::round(floatBody);
   if (index < 0  || floatBody >= maxFirstIndex) {
     app()->displayWarning(I18n::Message::ForbiddenValue);
     return false;
diff --git a/apps/settings/sub_menu/display_mode_controller.cpp b/apps/settings/sub_menu/display_mode_controller.cpp
index 86af72bde..945b0876a 100644
--- a/apps/settings/sub_menu/display_mode_controller.cpp
+++ b/apps/settings/sub_menu/display_mode_controller.cpp
@@ -76,10 +76,9 @@ bool DisplayModeController::textFieldShouldFinishEditing(TextField * textField,
 }
 
 bool DisplayModeController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  Context * globalContext = textFieldDelegateApp()->localContext();
-  float floatBody = PoincareHelpers::ApproximateToScalar<float>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    floatBody = PrintFloat::k_numberOfPrintedSignificantDigits;
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
+    return false;
   }
   if (floatBody < 1) {
    floatBody = 1;
diff --git a/apps/shared/editable_cell_table_view_controller.cpp b/apps/shared/editable_cell_table_view_controller.cpp
index f6ceaa6c0..03049a14c 100644
--- a/apps/shared/editable_cell_table_view_controller.cpp
+++ b/apps/shared/editable_cell_table_view_controller.cpp
@@ -24,11 +24,8 @@ bool EditableCellTableViewController::textFieldShouldFinishEditing(TextField * t
 }
 
 bool EditableCellTableViewController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if (!setDataAtLocation(floatBody, selectedColumn(), selectedRow())) {
diff --git a/apps/shared/float_parameter_controller.cpp b/apps/shared/float_parameter_controller.cpp
index 5c8392ace..3f210dce1 100644
--- a/apps/shared/float_parameter_controller.cpp
+++ b/apps/shared/float_parameter_controller.cpp
@@ -122,11 +122,8 @@ bool FloatParameterController::textFieldShouldFinishEditing(TextField * textFiel
 }
 
 bool FloatParameterController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if (!setParameterAtIndex(selectedRow(), floatBody)) {
diff --git a/apps/shared/sum_graph_controller.cpp b/apps/shared/sum_graph_controller.cpp
index 4fac3e5fd..3181f0f08 100644
--- a/apps/shared/sum_graph_controller.cpp
+++ b/apps/shared/sum_graph_controller.cpp
@@ -91,11 +91,8 @@ void SumGraphController::setRecord(Ion::Storage::Record record) {
 }
 
 bool SumGraphController::textFieldDidFinishEditing(TextField * textField, const char * text, Ion::Events::Event event) {
-  AppsContainer * appsContainer = ((TextFieldDelegateApp *)app())->container();
-  Context * globalContext = appsContainer->globalContext();
-  double floatBody = PoincareHelpers::ApproximateToScalar<double>(text, *globalContext);
-  if (std::isnan(floatBody) || std::isinf(floatBody)) {
-    app()->displayWarning(I18n::Message::UndefinedValue);
+  double floatBody;
+  if (textFieldDelegateApp()->hasUndefinedValue(text, floatBody)) {
     return false;
   }
   if ((m_step == Step::SecondParameter && floatBody < m_startSum) || !moveCursorHorizontallyToPosition(floatBody)) {
diff --git a/apps/shared/text_field_delegate_app.cpp b/apps/shared/text_field_delegate_app.cpp
index 720b6c0b1..b87a98b1b 100644
--- a/apps/shared/text_field_delegate_app.cpp
+++ b/apps/shared/text_field_delegate_app.cpp
@@ -41,6 +41,15 @@ bool TextFieldDelegateApp::isAcceptableText(const char * text) {
   return isAcceptableExpression(exp);
 }
 
+bool TextFieldDelegateApp::hasUndefinedValue(const char * text, double & value) {
+  value = PoincareHelpers::ApproximateToScalar<double>(text, *localContext());
+  bool isUndefined = std::isnan(value) || std::isinf(value);
+  if (isUndefined) {
+    displayWarning(I18n::Message::UndefinedValue);
+  }
+  return isUndefined;
+}
+
 /* Protected */
 
 TextFieldDelegateApp::TextFieldDelegateApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
diff --git a/apps/shared/text_field_delegate_app.h b/apps/shared/text_field_delegate_app.h
index 20e6eb0e8..74885ad69 100644
--- a/apps/shared/text_field_delegate_app.h
+++ b/apps/shared/text_field_delegate_app.h
@@ -18,6 +18,7 @@ public:
   bool textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) override;
   virtual bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
   bool isAcceptableText(const char * text);
+  bool hasUndefinedValue(const char * text, double & value);
 protected:
   TextFieldDelegateApp(Container * container, Snapshot * snapshot, ViewController * rootViewController);
   bool fieldDidReceiveEvent(EditableField * field, Responder * responder, Ion::Events::Event event);