draw-string

wayland/wio-terminal-lcd/draw-string

Draw a string.
draw-string
@/draw-string
Draw a string.
DEV@/lcd-device
An LCD device.
Xnumber
X coordinate.
Ynumber
Y coordinate.
Stringstring
String to draw.
Colorxod/color/color
Color of character.
Sizebyte
Text size multiplier (takes values from 01h to 07h).
UPDpulse
Update.
draw-string
Done
DEV
X
Y
String
Color
Size
UPD
Donepulse
Pulse on completion.
To use the node in your project you should have the wayland/wio-terminal-lcd library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

C++ implementation

node {
    void evaluate(Context ctx) {
        // The node responds only if there is an input pulse
        if (!isInputDirty<input_UPD>(ctx))
            return;

        // Get a pointer to the `TFT_eSPI tft` class instance
        auto tft = getValue<input_DEV>(ctx);

        auto xString = getValue<input_String>(ctx);
        int N=length(xString) + 1;
        char cString[N];
        for(int i=0;i<N;i++)
            cString[i]=0;
        dump(xString, cString);

        XColor color24 = getValue<input_Color>(ctx);
        uint16_t color16 = ((color24.r & 0xF8) << 8) | ((color24.g & 0xFC) << 3) | (color24.b >> 3);

        tft -> setTextColor(color16);
        tft -> setTextSize(getValue<input_Size>(ctx));
        tft -> drawString(cString,
                        getValue<input_X>(ctx),
                        getValue<input_Y>(ctx));

        emitValue<output_Done>(ctx, 1);
    }
}