private void tracker_ValueChanged(ValueControl sender, ValueChangedEventArgs e)
{
_zoom = ScaleFactor.CommonZooms[sender.Value];
this.ToolTipText = _zoom.ToString();
this.Invalidate();
//
if (ZoomChanged != null)
ZoomChanged(this, new EventArgs());
}
/// <summary>
/// gets the nearestcommon zoom index
/// </summary>
/// <returns></returns>
public static int GetNearestCommonZoom(ScaleFactor value)
{
//search nearest tracker value
int win = 5;
double dist = double.MaxValue;
for (int i = 0; i < ScaleFactor.CommonZooms.Length; i++) {
//squared distance
double d = CommonZooms[i] - value;
d = d*d;
if (d < dist) {
dist = d;
win = i;
}
}
return win;
}