isFullyZoomedOut method
if the chart is fully zoomed out, return true
@return
Implementation
bool isFullyZoomedOut() {
return isFullyZoomedOutX() && isFullyZoomedOutY();
}
if the chart is fully zoomed out, return true
@return
bool isFullyZoomedOut() {
return isFullyZoomedOutX() && isFullyZoomedOutY();
}