zoomOut method
Decreases the magnification of the plot area.
Implementation
void zoomOut() {
for (int index = 0;
index < _chart._chartAxis._axisCollections.length;
index++) {
final dynamic axis = _chart._chartAxis._axisCollections[index];
if (axis._zoomFactor < 1.0 && axis._zoomFactor >= 0.0) {
axis._zoomFactor += 0.1;
axis._zoomPosition = 0.2;
}
}
_chart._chartState._redraw();
}