Navigator.cpp

00001 #include "Navigator.h"
00002 
00003 Navigator::Navigator(Menu *root, RPG &rpg, TextLCD *lcd) : activeMenu(root), rpg(rpg), lcd(lcd) 
00004 {
00005     bottom = root->selections.size();
00006     cursorPos = 0;
00007     cursorLine = 1;
00008     button = 0;
00009     lastButton = 0;
00010     
00011     printMenu();
00012     printCursor();
00013 }
00014 
00015 void Navigator::printMenu()
00016 { 
00017     lcd->cls();
00018     if(bottom == 1){ // the current Menu only has one selection
00019         lcd->printf("%s\n", activeMenu->selections[0].selText);
00020     } else {
00021         if(cursorLine == 2){ // if we're at the bottom
00022             lcd->printf("%s\n", activeMenu->selections[cursorPos-1].selText);
00023             lcd->printf("%s\n", activeMenu->selections[cursorPos].selText);
00024         } else {
00025             lcd->printf("%s\n", activeMenu->selections[cursorPos].selText);
00026             lcd->printf("%s\n", activeMenu->selections[cursorPos+1].selText);
00027         }
00028     }
00029 }
00030 
00031 void Navigator::printCursor()
00032 {   
00033     if(activeMenu->selections[cursorPos].childMenu == NULL) printf("No child menu\n");
00034     else printf("child menu: %s\n", activeMenu->selections[cursorPos].childMenu->menuID);
00035      
00036     lcd->locate(0,0);
00037     if(cursorLine == 1){
00038         lcd->putc('>');
00039         lcd->locate(0,1);
00040         lcd->putc(' ');
00041     } else if(cursorLine == 2){
00042         lcd->putc(' ');
00043         lcd->locate(0,1);
00044         lcd->putc('>');
00045     }
00046 }
00047 
00048 void Navigator::poll()
00049 {
00050     if((direction = rpg.dir())!=0){ //Get Dir
00051         wait(0.2); 
00052         if(direction == 1) moveDown();
00053         else if(direction == -1) moveUp();
00054     }
00055        
00056     if ((button = rpg.pb()) && !lastButton){ //prevents multiple selections when button is held down
00057         wait(0.2);
00058         if(activeMenu->selections[cursorPos].fun != NULL){
00059             (activeMenu->selections[cursorPos].fun)();
00060         }
00061         if(activeMenu->selections[cursorPos].childMenu != NULL){
00062             activeMenu = activeMenu->selections[cursorPos].childMenu;
00063             bottom = activeMenu->selections.size();
00064             cursorPos = 0;
00065             cursorLine = 1;
00066             printMenu();
00067             printCursor();
00068         }
00069     }
00070     lastButton = button;
00071 }
00072 
00073 void Navigator::moveUp()
00074 {
00075     if(cursorLine == 1){
00076         printMenu();
00077     } else if(cursorLine == 2){
00078         cursorLine = 1;
00079     }
00080     
00081     if(cursorPos != 0){
00082         cursorPos--;
00083         printMenu();
00084     }
00085     printCursor();
00086 }
00087 
00088 void Navigator::moveDown()
00089 {
00090     if(cursorLine == 1){
00091         cursorLine = 2;
00092     } else if(cursorLine == 2){
00093         printMenu();
00094     }
00095     
00096     if(cursorPos != (bottom-1)){
00097         cursorPos++;
00098         printMenu();
00099     }
00100     printCursor();
00101 }