private Point CalculateLocation(Control userCtrl, ControlPosition position, Point?location, Control owner)
{
var pt = Point.Empty;
var ownerPos = Point.Empty;
switch (position)
{
case ControlPosition.Owner:
System.Diagnostics.Debug.Assert(owner != null, "Missing Owner");
if (userCtrl is Form)
{
pt = owner.PointToScreen(Point.Empty);
}
else
{
pt = owner.Location;
}
pt.Y += owner.Height;
ownerPos = _owner.PointToScreen(Point.Empty);
if (pt.X + userCtrl.Width > ownerPos.X + _owner.Width)
{
pt.X = ownerPos.X + _owner.Width - userCtrl.Width;
}
return(pt);
case ControlPosition.Center:
ownerPos = _owner.PointToScreen(Point.Empty);
ownerPos.X += (owner.Width - userCtrl.Width) / 2;
ownerPos.Y += (owner.Height - userCtrl.Height) / 2;
if (ownerPos.X < 0)
{
ownerPos.X = 0;
}
if (ownerPos.Y < 0)
{
ownerPos.Y = 0;
}
return(ownerPos);
case ControlPosition.Manual:
System.Diagnostics.Debug.Assert(location != null, "Location is null");
return((Point)location);
default:
return((Point)location);
}
}