File content as of revision 10:2b6ddf53b05e:

#include "Navigator.h"

Navigator::Navigator(Menu *root, TextLCD_Base *lcd) : activeMenu(root), lcd(lcd)
{

    _cursorPos = 0;
    _cursorLine = 1;
    _display_rows = lcd->rows();
    _display_cols = lcd->columns();

    activeMenu->CurrentSelection = _cursorPos;

    _wait_for_select = false;
    _wait_for_yesno  = false;

    printMenu();
    printCursor();
}

void Navigator::printMenu()
{
    int index =0;
    lcd->cls();

    for(int row=0; row < _display_rows; row++) {

        lcd->locate(0,row);
        index = row + _cursorPos - (_cursorLine-1);    // index into selection for this line
        //should we display a menu on this line?
        if (index <= activeMenu->selections.size()-1 ) {
            lcd->printf(" %s", activeMenu->selections[index].selText);
        }
    }
}

void Navigator::printCursor()
{
    if(activeMenu->selections[_cursorPos].childMenu == NULL) printf("No child menu\n");
    else printf("child menu: %s\n", activeMenu->selections[_cursorPos].childMenu->menuID);

    lcd->locate(0,0);
    for (int row=0; row<_display_rows; row++) {
        lcd->locate(0,row);
        if (row == _cursorLine-1) {
            //we are on Cursor-Line
            //print cursor
            lcd->putc('>');
        } else {
            //on other lines print a space
            lcd->putc(' ');
        }
    }
}

void Navigator::poll()
{
// no longer needed
}

void Navigator::show_yes_no(bool yesorno)
{
    // MenuItem is a Yes/no question?
    // show the text in yesnodata and wait for a yes or no
    lcd->cls();
    //printf("YesNo: \n");
    //printf("%s <Yes><No>",activeMenu->selections[_cursorPos].menu_parameter->text);
    if (activeMenu->selections[_cursorPos].menu_parameter->text != NULL) {
        if (yesorno) {
            // Yes is default
            lcd->printf("%s <Yes> No ",activeMenu->selections[_cursorPos].menu_parameter->text);
        } else {
            //No is default
            lcd->printf("%s  Yes <No>",activeMenu->selections[_cursorPos].menu_parameter->text);
        }
        activeMenu->selections[_cursorPos].menu_parameter->yes_no = yesorno;
    }
}

void Navigator::select()
{
    Menu *lastMenu;

    // are we waiting for a Select()?
    if (_wait_for_select) {
        _wait_for_select = false;
        // show the menu again
        printMenu();
        printCursor();

    } else if (_wait_for_yesno) {
        // user selected a value
        _wait_for_yesno = false;
        // show the menu again
        printMenu();
        printCursor();
    } else if(activeMenu->selections[_cursorPos].itemMode == MenuItem::mode_yes_no) {
        show_yes_no(activeMenu->selections[_cursorPos].menu_parameter->yes_no);
        _wait_for_yesno = true;
    } else {
        // normal mneuItem
        if(activeMenu->selections[_cursorPos].userAction != NULL) {
            //execute function
            (activeMenu->selections[_cursorPos].userAction)();
            // refresh the Menu
            //printMenu();
            //printCursor();
        }
        //change the menu?
        if(activeMenu->selections[_cursorPos].childMenu != NULL) {
            lastMenu = activeMenu;

            //change to childMenu
            activeMenu = activeMenu->selections[_cursorPos].childMenu;

            // if we went up one level, set CurrectSelection of SubMenu to zero, if we come back again
            if (activeMenu->selections[activeMenu->CurrentSelection].childMenu == lastMenu) {
                //reset menuposition of submenu to zero
                lastMenu->CurrentSelection = 0;
            }

            // return to last position from that menu, if we went up on level
            _cursorPos = activeMenu->CurrentSelection;

            _cursorLine = 1;
            printMenu();
            printCursor();
        }
        // only accept select after showing this menu/user_action ?
        if(activeMenu->selections[_cursorPos].itemMode == MenuItem::mode_wait_select) {
            _wait_for_select = true;
        }
    }
}

void Navigator::moveUp()
{
   if (_wait_for_yesno) {
        // change Yes/no Selection
        show_yes_no( ! activeMenu->selections[_cursorPos].menu_parameter->yes_no);
    }else
    // only if we don't wait for a select()
    if (! _wait_for_select) {
        // Show the MenuItems
        // allready on TOP of Display?
        if(_cursorLine > 1) {
            // scroll up cursor one line
            _cursorLine--;
        }

        if(_cursorPos > 0) {
            //scroll up one item
            _cursorPos--;
            activeMenu->CurrentSelection = _cursorPos;

        }
        printMenu();
        printCursor();
    }
}

void Navigator::moveDown()
{
    if (_wait_for_yesno) {
        // change Yes/no Selection
        show_yes_no( ! activeMenu->selections[_cursorPos].menu_parameter->yes_no);
    }else
    // only if we don't wait for a select()
    if (! _wait_for_select) {
        //Show the menuItem
        // allready on last line of display?
        if (_cursorPos == activeMenu->selections.size()-1) {
            //stay on this line
        } else {
            // move down
            if(_cursorLine < _display_rows) {
                // Only move down cursor
                _cursorLine++;
                _cursorPos++;
            } else {
                // on last Display-Line scroll down Menu
                _cursorPos++;
            }
            // save currentPosition in Menu
            activeMenu->CurrentSelection = _cursorPos;

        }

        printMenu();
        printCursor();
    } 
}