Menu.h

00001 #ifndef FBRDASH_MENU_H
00002 #define FBRDASH_MENU_H
00003 
00004 #include "TextLCD.h"
00005 #include "PinDetect.h"
00006 #include <string>
00007 
00008 class MenuEntryBase
00009 {
00010     public:
00011         bool editable;
00012         
00013         string label;
00014         string format;
00015         
00016         virtual void increment() = 0;
00017         virtual void decrement() = 0;
00018         virtual string getFormatted() = 0;
00019 };
00020 
00021 template <typename T>
00022 class MenuEntry : public MenuEntryBase
00023 {
00024     public:
00025         T* value;
00026         T step;
00027         
00028         virtual void increment()
00029         {
00030             *value += step;
00031         }
00032         
00033         virtual void decrement()
00034         {
00035             *value -= step;
00036         }
00037         
00038         virtual string getFormatted()
00039         {
00040             char buffer[16];
00041             sprintf(buffer, format.c_str(), *value);
00042             return buffer;
00043         }
00044 };
00045 
00046 class Menu
00047 {
00048     public:
00049         bool display;
00050         bool edit;
00051         
00052         Menu(TextLCD* _screen, PinName ok, PinName left, PinName right);
00053         
00054         template <typename T>
00055         void addItem(string label, string format, T* value);
00056         
00057         template <typename T>
00058         void addEditableItem(string label, string format, T* value, T step);
00059         
00060         void refresh();
00061         
00062         void enter();
00063         void done();
00064         void left();
00065         void right();
00066         
00067     private:
00068         MenuEntryBase* entries[20];
00069         int entryCount;
00070         
00071         PinDetect* btnOK;
00072         PinDetect* btnLeft;
00073         PinDetect* btnRight;
00074         
00075         TextLCD* screen;
00076         
00077         int position;
00078         bool ignoreNextEnter;
00079         
00080         Timeout leftHeldTimeout;
00081         Timeout rightHeldTimeout;
00082         
00083         void leftHeld();
00084         void cancelLeftHeld();
00085         void rightHeld();
00086         void cancelRightHeld();
00087     
00088     static const float holdRepeatTime = 0.15; //should be multiple of screen refresh rate or wierdness will ensue
00089     static const char leftArrow = 0x7F;
00090     static const char rightArrow = 0x7E;
00091 };
00092 
00093 template <typename T>
00094 void Menu::addItem(string label, string format, T* value)
00095 {
00096     MenuEntry<T>* newEntry = new MenuEntry<T>();
00097     
00098     newEntry->value = value;
00099     newEntry->editable = false;
00100     
00101     newEntry->label = label;
00102     newEntry->format = format;
00103     
00104     entries[entryCount] = newEntry;
00105     entryCount++;
00106 }
00107 
00108 template <typename T>
00109 void Menu::addEditableItem(string label, string format, T* value, T step)
00110 {
00111     MenuEntry<T> newEntry;
00112     
00113     newEntry.value = value;
00114     newEntry.editable = true;
00115     newEntry.step = step;
00116     
00117     newEntry.label = label;
00118     newEntry.format = format;
00119     
00120     entries[entryCount] = newEntry;
00121     entryCount++;
00122 }
00123 
00124 #endif