drawBackground method
This function draws a colored background behind the chart.
Implementation
@visibleForTesting
void drawBackground(CanvasWrapper canvasWrapper, PaintHolder<D> holder) {
final data = holder.data;
if (data.backgroundColor.opacity == 0.0) {
return;
}
final viewSize = canvasWrapper.size;
_backgroundPaint.color = data.backgroundColor;
canvasWrapper.drawRect(
Rect.fromLTWH(0, 0, viewSize.width, viewSize.height),
_backgroundPaint,
);
}