draw-rectangle

wayland/wio-terminal-lcd/draw-rectangle

Draw a rectangle.
draw-rectangle
@/draw-rectangle
Draw a rectangle.
DEV@/lcd-device
An LCD device.
Xnumber
X coordinate of the top-left corner.
Ynumber
Y coordinate of the top-left corner.
Wnumber
Width (pixels).
Hnumber
Height (pixels)
Colorxod/color/color
Color.
Fillboolean
True to fill rectangle with colour, False to draw outline only.
UPDpulse
Update.
draw-rectangle
Done
DEV
X
Y
W
H
Color
Fill
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);

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

        if (getValue<input_Fill>(ctx)) {
            tft -> fillRect(getValue<input_X>(ctx),  getValue<input_Y>(ctx), getValue<input_W>(ctx), getValue<input_H>(ctx), color16);
        } else {
            tft -> drawRect(getValue<input_X>(ctx),  getValue<input_Y>(ctx), getValue<input_W>(ctx), getValue<input_H>(ctx), color16);
        }

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