tftprint

C++ implementation

struct State {
};

{{ GENERATED_CODE }}

void evaluate(Context ctx) {
    if (!isInputDirty<input_UPD>(ctx))
        return;
   
    auto tft = getValue<input_DEV>(ctx);
    auto cx = getValue<input_CX>(ctx);
    auto cy = getValue<input_CY>(ctx);
    auto size = getValue<input_SIZE>(ctx);
    auto colour = getValue<input_COL>(ctx);
    auto TXT = getValue<input_MSG>(ctx);
    // `length` returns the number of characters and you need an extra one to keep the
    // terminal NUL-character used in C string representation. Initialize to 0’s to ensure the last char is indeed NUL
    char TXTC[length(TXT) + 1] = { 0 };
    // move the data from XString to the plain C string
    dump(TXT, TXTC);    

    tft->setCursor(cx, cy); 
    tft->setTextColor(colour,0); 
    tft->setTextSize(size); 
    tft->print(TXTC);
    
    emitValue<output_DONE>(ctx, 1);
}