private Rect CalcPlacement(NearbyLocation location, Rect windowRect)
{
switch (location)
{
case NearbyLocation.DownLeft:
return(new Rect(_placement.Left - windowRect.Left, _placement.Bottom - windowRect.Top, windowRect.Width, windowRect.Height));
case NearbyLocation.DownRight:
return(new Rect(_placement.Right - windowRect.Right, _placement.Bottom - windowRect.Top, windowRect.Width, windowRect.Height));
case NearbyLocation.UpLeft:
return(new Rect(_placement.Left - windowRect.Left, _placement.Top - windowRect.Bottom, windowRect.Width, windowRect.Height));
case NearbyLocation.UpRight:
return(new Rect(_placement.Right - windowRect.Right, _placement.Top - windowRect.Bottom, windowRect.Width, windowRect.Height));
case NearbyLocation.LeftSideTop:
return(new Rect(_placement.Left - windowRect.Right, _placement.Top - windowRect.Top, windowRect.Width, windowRect.Height));
case NearbyLocation.LeftSideBottom:
return(new Rect(_placement.Left - windowRect.Right, _placement.Bottom - windowRect.Bottom, windowRect.Width, windowRect.Height));
case NearbyLocation.RightSideTop:
return(new Rect(_placement.Right - windowRect.Left, _placement.Top - windowRect.Top, windowRect.Width, windowRect.Height));
case NearbyLocation.RightSideBottom:
return(new Rect(_placement.Right - windowRect.Left, _placement.Bottom - windowRect.Bottom, windowRect.Width, windowRect.Height));
default:
return(new Rect(_placement.Left - windowRect.Left, _placement.Bottom - windowRect.Top, windowRect.Width, windowRect.Height));
}
}
private static Point LocateNearby(Rect elementRect, Rect windowRect, NearbyLocation location)
{
switch (location)
{
case NearbyLocation.DownLeft:
return(new Point(elementRect.Left - windowRect.Left, elementRect.Bottom - windowRect.Top));
case NearbyLocation.DownRight:
return(new Point(elementRect.Right - windowRect.Right, elementRect.Bottom - windowRect.Top));
case NearbyLocation.UpLeft:
return(new Point(elementRect.Left - windowRect.Left, elementRect.Top - windowRect.Bottom));
case NearbyLocation.UpRight:
return(new Point(elementRect.Right - windowRect.Right, elementRect.Top - windowRect.Bottom));
case NearbyLocation.LeftSideTop:
return(new Point(elementRect.Left - windowRect.Right, elementRect.Top - windowRect.Top));
case NearbyLocation.LeftSideBottom:
return(new Point(elementRect.Left - windowRect.Right, elementRect.Bottom - windowRect.Bottom));
case NearbyLocation.RightSideTop:
return(new Point(elementRect.Right - windowRect.Left, elementRect.Top - windowRect.Top));
case NearbyLocation.RightSideBottom:
return(new Point(elementRect.Right - windowRect.Left, elementRect.Bottom - windowRect.Bottom));
default:
return(new Point(elementRect.Left - windowRect.Left, elementRect.Bottom - windowRect.Top));
}
}
internal WindowLocator(FrameworkElement target, Rect rectOnTarget, Window window, NearbyLocation location)
{
_placement = new Rect(target.PointToScreen(rectOnTarget.TopLeft), target.PointToScreen(rectOnTarget.BottomRight));
_workingArea = GetWorkingAreaOf(target);
_location = location;
_window = window;
_window.LayoutUpdated += Window_LayoutUpdated;
Rect r = GetWindowPlacement(false);
_window.WindowStartupLocation = WindowStartupLocation.Manual;
_window.Left = r.X;
_window.Top = r.Y;
}
public static void LocateNearby(FrameworkElement target, Window window, NearbyLocation location)
{
new WindowLocator(target, window, location);
}
public static void ShowNearby(Window window, FrameworkElement element, NearbyLocation location)
{
WindowLocator.LocateNearby(element, window, location);
window.Show();
}
private static Rect TryLocate(Window window, Size windowSize, Thickness margin, Rect elementRect, NearbyLocation location, Rect workingArea)
{
Rect rW = GetWindowRect(window, windowSize, margin);
Rect r0 = new Rect(LocateNearby(elementRect, rW, location), windowSize);
if (workingArea.Contains(r0))
{
return(r0);
}
foreach (NearbyLocation l in NearbyLocationCandidates[location])
{
Rect r = new Rect(LocateNearby(elementRect, rW, l), windowSize);
if (workingArea.Contains(r))
{
return(r);
}
}
if (workingArea.Right < r0.Right)
{
r0.X += (workingArea.Right - r0.Right);
}
if (workingArea.Bottom < r0.Bottom)
{
r0.Y += (workingArea.Bottom - r0.Bottom);
}
if (r0.Left < workingArea.Left)
{
r0.X = workingArea.Left;
}
if (r0.Top < workingArea.Top)
{
r0.Y = workingArea.Top;
}
return(r0);
}
