draw-string(wt-lcd-device)
wayland/wio-terminal-lcd/draw-string(wt-lcd-device)
Draw a string.
draw-string(wt-lcd-device)
@/draw-string(wt-lcd-device)
Draw a string.
DEV@/wt-lcd-device
An LCD device.
Xnumber
X coordinate.
Ynumber
Y coordinate.
Stringstring
String to draw.
Colorxod/color/color
Color of character.
Fontwayland/wio-terminal-fonts/font
Font. Choose one of the fonts in wayland/wio-terminal-fonts. If no font is specified the node will default to GLCD.
Sizebyte
Text size multiplier (takes values from 01h to 07h).
UPDpulse
Update.
Donepulse
Pulse on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
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 -> setFreeFont(getValue<input_Font>(ctx));
tft -> setTextSize(getValue<input_Size>(ctx));
tft -> drawString(cString,
getValue<input_X>(ctx),
getValue<input_Y>(ctx));
emitValue<output_Done>(ctx, 1);
}
}