private static Point Gravitate(Point anchorPoint, Size size, PopupGravity gravity)
{
double x, y;
if ((gravity & PopupGravity.Left) != 0)
{
x = -size.Width;
}
else if ((gravity & PopupGravity.Right) != 0)
{
x = 0;
}
else
{
x = -size.Width / 2;
}
if ((gravity & PopupGravity.Top) != 0)
{
y = -size.Height;
}
else if ((gravity & PopupGravity.Bottom) != 0)
{
y = 0;
}
else
{
y = -size.Height / 2;
}
return(anchorPoint + new Point(x, y));
}
public void ConfigurePosition(IVisual target, PlacementMode placement, Point offset,
PopupAnchor anchor = PopupAnchor.None, PopupGravity gravity = PopupGravity.None,
PopupPositionerConstraintAdjustment constraintAdjustment = PopupPositionerConstraintAdjustment.All,
Rect?rect = null)
{
_positionerParameters.ConfigurePosition((TopLevel)_overlayLayer.GetVisualRoot(), target, placement, offset, anchor,
gravity, constraintAdjustment, rect);
UpdatePosition();
}
private Rect Calculate(Size translatedSize,
Rect anchorRect, PopupAnchor anchor, PopupGravity gravity,
PopupPositionerConstraintAdjustment constraintAdjustment, Point offset)
{
var parentGeometry = _popup.ParentClientAreaScreenGeometry;
anchorRect = anchorRect.Translate(parentGeometry.TopLeft);
Rect GetBounds()
{
var screens = _popup.Screens;
var targetScreen = screens.FirstOrDefault(s => s.Bounds.Contains(anchorRect.TopLeft))
?? screens.FirstOrDefault(s => s.Bounds.Intersects(anchorRect))
?? screens.FirstOrDefault(s => s.Bounds.Contains(parentGeometry.TopLeft))
?? screens.FirstOrDefault(s => s.Bounds.Intersects(parentGeometry))
?? screens.FirstOrDefault();
if (targetScreen != null && targetScreen.WorkingArea.IsEmpty)
{
return(targetScreen.Bounds);
}
return(targetScreen?.WorkingArea
?? new Rect(0, 0, double.MaxValue, double.MaxValue));
}
var bounds = GetBounds();
bool FitsInBounds(Rect rc, PopupAnchor edge = PopupAnchor.AllMask)
{
if ((edge & PopupAnchor.Left) != 0 &&
rc.X < bounds.X)
{
return(false);
}
if ((edge & PopupAnchor.Top) != 0 &&
rc.Y < bounds.Y)
{
return(false);
}
if ((edge & PopupAnchor.Right) != 0 &&
rc.Right > bounds.Right)
{
return(false);
}
if ((edge & PopupAnchor.Bottom) != 0 &&
rc.Bottom > bounds.Bottom)
{
return(false);
}
return(true);
}
public void ConfigurePosition(IVisual target, PlacementMode placement, Point offset,
PopupAnchor anchor = PopupAnchor.None,
PopupGravity gravity = PopupGravity.None,
PopupPositionerConstraintAdjustment constraintAdjustment = PopupPositionerConstraintAdjustment.All,
Rect?rect = null)
{
_positionerParameters.ConfigurePosition(_parent, target,
placement, offset, anchor, gravity, constraintAdjustment, rect);
if (_positionerParameters.Size != default)
{
UpdatePosition();
}
}
