draw-rectangle
wayland/ssd1306-oled-i2c/draw-rectangle
Draw a rectangle. Writes data to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
draw-rectangle
@/draw-rectangle
Draw a rectangle. Writes data to display buffer. To show content of display buffer on screen use node send-buffer-to-display.
DEV@/ssd1306-oled-i2c-device
An SSD1306 OLED device.
Xnumber
Top left corner x coordinate.
Ynumber
Top left corner y coordinate.
Wnumber
Width in pixels.
Hnumber
Height in pixels.
COLOURnumber
Colour of circle. Options:
0 = black;
1 = white;
2 = invert.
FILLboolean
TRUE to fill rectangle with colour, FALSE to draw outline only.
UPDpulse
Update. Trigger write to display buffer.
DONEpulse
Pulses on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
struct State {
};
{{ GENERATED_CODE }}
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 `Adafruit_SSD1306` class instance
auto display = getValue<input_DEV>(ctx);
auto x = getValue<input_X>(ctx);
auto y = getValue<input_Y>(ctx);
auto w = getValue<input_W>(ctx);
auto h = getValue<input_H>(ctx);
auto colour = getValue<input_COLOUR>(ctx);
auto fill = getValue<input_FILL>(ctx);
if (fill){
display->fillRect(x, y, w, h, colour);
}else{
display->drawRect(x, y, w, h, colour);
}
emitValue<output_DONE>(ctx, 1);
}