Created ListMenu class, which uses std::initializer_list to (hopefully)

facilitate creating a large menu.  Compiles, but hasn't been tested.

ubitx_iop/menu.h

@@ -13,8 +13,8 @@
 extern SpeechCompressor speechCompressor; // This should be somewhere else.
 
 // 16 characters on display
-#define MAX_TEXT_LEN 16
-#define MENU_SELECTED_CHAR '>'
+const int  MAX_TEXT_LEN = 16;
+const char MENU_SELECTED_CHAR = '>';
 
 const char blankLine[17] = "                ";
 
@@ -29,25 +29,89 @@ class MenuItem {
   virtual MenuItem* prev() = 0;
   virtual MenuItem* next() = 0;
 };
-/*
+
+//======================================================================
+// ListMenu
+//======================================================================
+
+const int MAX_LISTMENU_TEXT_LEN = 15;
+
 class ListMenu : public MenuItem {
   public:
-  ListMenu(const char* title, std::initializer_list<MenuItem*> items) {
-    _items = new MenuItem*[items.size()];
-  }
-  virtual ~MenuItem() {
-    delete _items;
-  }
-  virtual void update() {
-    //sprintf(_text, "
+  ListMenu(const char* text, std::initializer_list<const MenuItem*> items):
+    _length(items.size()), _current(0), _dirty(true)
+  {
+    char temp[MAX_LISTMENU_TEXT_LEN];
+    strncpy(temp, text, MAX_LISTMENU_TEXT_LEN);
+    temp[MAX_LISTMENU_TEXT_LEN] = '\0';    
+    
+    _items = new MenuItem*[_length];
+
+    int count = 0;
+    for (auto element : items) {
+      _items[count] = element;
+      count++;
+    }
+
+    sprintf(_text, "%c%s", MENU_SELECTED_CHAR, temp);
   }
   
+  virtual ~ListMenu() {
+    delete [] _items;
+  }
+  
+  virtual void update()
+  {
+    if (_dirty) {
+      sendIOPMenuDisplay(_text);
+      _dirty = false;
+    }
+  }
+
+  virtual MenuItem* select() 
+  {
+    _dirty = true;
+    return _items[_current];
+  }
+
+  virtual MenuItem* altSelect()
+  {
+    _dirty = true;
+    return this;
+  }
+  
+  virtual MenuItem* exit()
+  {
+    _dirty = true;
+    return NULL;
+  }
+  
+  virtual MenuItem* prev() 
+  {
+    if (--_current < 0) {
+      _current += _length;
+    }
+    _dirty = true;
+    return this;
+  }
+  
+  virtual MenuItem* next()
+  {
+    _current = ++_current % _length;
+    _dirty = true;
+    return this;
+  }
+
   private:
-  
+  bool _dirty;
   MenuItem** _items;
-  char _text[MAX_TEXT_LEN+1];
+  int _length;
+  int _current;
+  char _text[MAX_LISTMENU_TEXT_LEN+1];
 };
-*/
+
+//======================================================================
+
 const char modeID[] = {'s', 'S', 'c', 'C', 'd', 'D', 't', 'T'};
 const char* const filterID[NUM_RIG_MODES][NUM_RX_FILTERS] = {
   {"2.8", "2.4", "1.8"},  // LSB