bool AcceptableUndockingStartPoint()
{
#if alldbg || dbg
DesktopPanelTool.Lib.Debug.WriteLine($"acceptable start point: has parent={WPFHelper.HasParent<WidgetControl>(Mouse.DirectlyOver as DependencyObject)}");
#endif
return(!WPFHelper.HasParent <WidgetControl>(Mouse.DirectlyOver as DependencyObject));
}
bool AcceptMousePosition(Point p)
{
var m = AssociatedObject.Margin;
return(IsMovable &&
((
p.X > NotMovableEdgeSize + m.Left &&
p.X < AssociatedObject.Width - NotMovableEdgeSize - m.Right &&
p.Y > NotMovableEdgeSize + m.Top &&
p.Y < AssociatedObject.Height - NotMovableEdgeSize - m.Bottom
) &&
(TypeControlUnderMouseAvoidingMove == null ||
(Mouse.DirectlyOver is DependencyObject o &&
!WPFHelper.HasParent(TypeControlUnderMouseAvoidingMove, o))
)
));
}