UI.h

/*
 * Author: Napattnpp
 * File: UI.h
 * Version: u.1.1
*/

class UI { 
    private:
        int numOfMode = 0;
        int arrow = 0;
        char modeName[16][16];

    public:
        void setMode(const char* _modeName, ...);
        int start();
};

void UI::setMode(const char* _modeName, ...) {
    va_list vaList;

    va_start(vaList, _modeName);

    int i = 0;
    while (_modeName) {
        strcpy(modeName[i], _modeName);
        _modeName = va_arg(vaList, const char*);
        i++;
    }
    
    numOfMode = i + 1;
    va_end(vaList);
}

int UI::start() {
    // Show title
    SCREEN_TEXT(0, 0, "[Select mode]")

    // Show mode
    for (int i = 1; i < numOfMode; i++) {
        SCREEN_TEXT(i, 4, modeName[i-1])
    }

    SCREEN_SHOW

    while (1) {
        arrow = knob();
        // arrow start with 1 to numOfMode
        arrow = map(arrow, 0, MAX_ANALOG, 1, numOfMode);

        // Show move arrow
        if (arrow != 1) { SCREEN_TEXT(arrow-1, 0, "    ") }
        SCREEN_TEXT(arrow, 0, "--> ")
        SCREEN_TEXT(arrow+1, 0, "    ")

        SCREEN_SHOW

        // If 'OK-Switch' is pressed then clear screen and return mode value (arrow)
        if (sw_ok()) {
            SCREEN_CLEAR

            return arrow;
        }
    }
}