From a6a8b57ed5ef62982ae5f0a1620432bed31177ab Mon Sep 17 00:00:00 2001
From: Marco Gulino <marco@gulinux.net>
Date: Fri, 12 Jul 2019 19:14:19 +0100
Subject: [PATCH] Add `type` getter to MenuComponent and subclasses, in order
 to detect the right type for casting a menu item. Add getter and setter for
 increment in NumericMenuItem

---
 MenuSystem.cpp | 27 +++++++++++++++++++++++++++
 MenuSystem.h   | 13 +++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/MenuSystem.cpp b/MenuSystem.cpp
index a2cb7d4..77a619c 100644
--- a/MenuSystem.cpp
+++ b/MenuSystem.cpp
@@ -200,6 +200,12 @@ void Menu::render(MenuComponentRenderer const& renderer) const {
     renderer.render_menu(*this);
 }
 
+MenuComponent::Type Menu::type() const {
+    return MenuComponent::TypeMenu;
+}
+
+
+
 // *********************************************************
 // BackMenuItem
 // *********************************************************
@@ -224,6 +230,10 @@ void BackMenuItem::render(MenuComponentRenderer const& renderer) const {
     renderer.render_back_menu_item(*this);
 }
 
+MenuComponent::Type BackMenuItem::type() const {
+    return MenuComponent::TypeBackMenuItem;
+}
+
 // *********************************************************
 // MenuItem
 // *********************************************************
@@ -253,6 +263,10 @@ bool MenuItem::prev(bool loop) {
     return false;
 }
 
+MenuComponent::Type MenuItem::type() const {
+    return MenuComponent::TypeMenuItem;
+}
+
 // *********************************************************
 // NumericMenuItem
 // *********************************************************
@@ -325,6 +339,15 @@ void NumericMenuItem::set_max_value(float value) {
     _max_value = value;
 }
 
+float NumericMenuItem::get_increment() const {
+    return _increment;
+}
+
+void NumericMenuItem::set_increment(float increment) {
+    _increment = increment;
+}
+
+
 bool NumericMenuItem::next(bool loop) {
     _value += _increment;
     if (_value > _max_value) {
@@ -347,6 +370,10 @@ bool NumericMenuItem::prev(bool loop) {
     return true;
 }
 
+MenuComponent::Type NumericMenuItem::type() const {
+    return MenuComponent::TypeNumericMenuItem;
+}
+
 // *********************************************************
 // MenuSystem
 // *********************************************************
diff --git a/MenuSystem.h b/MenuSystem.h
index 06f8d27..a5f4320 100644
--- a/MenuSystem.h
+++ b/MenuSystem.h
@@ -101,6 +101,12 @@ class MenuComponent {
     //!                      selected.
     void set_select_function(SelectFnPtr select_fn);
 
+    enum Type { TypeMenu, TypeMenuItem, TypeNumericMenuItem, TypeBackMenuItem };
+    //! \brief Returns the type of this item.
+    //!
+    //! Subclasses should reimplement this to return the correct type.
+    virtual Type type() const = 0;
+
 protected:
     //! \brief Processes the next action
     //!
@@ -196,6 +202,7 @@ class MenuItem : public MenuComponent {
 
     //! \copydoc MenuComponent::render
     virtual void render(MenuComponentRenderer const& renderer) const;
+    virtual Type type() const;
 
 protected:
     //! \copydoc MenuComponent::next
@@ -226,6 +233,7 @@ class BackMenuItem : public MenuItem {
 
     virtual void render(MenuComponentRenderer const& renderer) const;
 
+    virtual Type type() const;
 protected:
     virtual Menu* select();
 
@@ -269,15 +277,19 @@ class NumericMenuItem : public MenuItem {
     float get_value() const;
     float get_min_value() const;
     float get_max_value() const;
+    float get_increment() const;
 
     void set_value(float value);
     void set_min_value(float value);
     void set_max_value(float value);
 
+    void set_increment(float increment);
+
     String get_formatted_value() const;
 
     virtual void render(MenuComponentRenderer const& renderer) const;
 
+    virtual Type type() const;
 protected:
     virtual bool next(bool loop=false);
     virtual bool prev(bool loop=false);
@@ -322,6 +334,7 @@ class Menu : public MenuComponent {
     //! \copydoc MenuComponent::render
     void render(MenuComponentRenderer const& renderer) const;
 
+    virtual Type type() const;
 protected:
     void set_parent(Menu* p_parent);
     Menu const* get_parent() const;