change-param
wayland/wio-terminal-bar-chart/change-param
Change parameters. Modify the Label, Value and Color of a bar identified by Index. See patch: 05-example.
change-param
@/change-param
Change parameters. Modify the Label, Value and Color of a bar identified by Index. See patch: 05-example.
BChart
A bar-chart object.
Indexbyte
Index of bar (first bar is indexed as 1).
Labelstring
Label for bar.
Valuenumber
Value to display.
Colorxod/color/color
Color of bar.
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 barchart = getValue<input_BChart>(ctx);
auto xString = getValue<input_Label>(ctx);
int N=length(xString) + 1;
char cString[N];
for(int i=0;i<N;i++)
cString[i]=0;
dump(xString, cString);
uint8_t idx = getValue<input_Index>(ctx);
float value = getValue<input_Value>(ctx);
XColor color24 = getValue<input_Color>(ctx);
uint16_t color16 = ((color24.r & 0xF8) << 8) | ((color24.g & 0xFC) << 3) | (color24.b >> 3);
barchart -> changeParam(idx, cString, value, color16);
emitValue<output_Done>(ctx, 1);
}
}