private Point GetAnchorOffset(AnchorBorder anchorBorder, FrameworkElement placementTarget, Point topLeftToTargetPoint, Point topRightToTargetPoint, bool isAbove)
{
if (anchorBorder == null || placementTarget == null)
{
throw new ArgumentNullException(anchorBorder == null ? "anchorBorder" : "placementTarget");
}
var anchorPoint = new Point();
if (topRightToTargetPoint.X <= 0)
{
anchorPoint.X = 0;
anchorPoint.Y = isAbove ? 0 : placementTarget.ActualHeight;
}
if (topLeftToTargetPoint.X <= 0 && topRightToTargetPoint.X > 0)
{
anchorPoint.X = Math.Min(topRightToTargetPoint.X, placementTarget.ActualWidth) / 2;
anchorPoint.Y = isAbove ? 0 : placementTarget.ActualHeight;
}
if (topLeftToTargetPoint.X > 0)
{
anchorPoint.X = Math.Min((placementTarget.ActualWidth - topLeftToTargetPoint.X) / 2 + topLeftToTargetPoint.X, placementTarget.ActualWidth);
anchorPoint.Y = isAbove ? 0 : placementTarget.ActualHeight;
}
return(new Point(anchorPoint.X - topLeftToTargetPoint.X + (isAbove ? anchorBorder.CornerRadius.TopLeft : anchorBorder.CornerRadius.BottomLeft), isAbove ? Math.Abs(anchorBorder.AnchorOffset.Y) : (anchorPoint.Y - topLeftToTargetPoint.Y - Math.Abs(anchorBorder.AnchorOffset.Y))));
}
private double GetDockOffset(AnchorBorder anchorBorder, FrameworkElement placementTarget, Point topLeftToTargetPoint, Point topRightToTargetPoint, bool isAbove)
{
if (anchorBorder == null || placementTarget == null)
{
throw new ArgumentNullException(anchorBorder == null ? "anchorBorder" : "placementTarget");
}
double leftDockOffset = 0;
if (topRightToTargetPoint.X <= anchorBorder.DockLength)
{
leftDockOffset = topRightToTargetPoint.X - topLeftToTargetPoint.X - anchorBorder.DockLength + (isAbove ? anchorBorder.CornerRadius.TopLeft : anchorBorder.CornerRadius.BottomLeft);
}
if (topRightToTargetPoint.X > anchorBorder.DockLength && topLeftToTargetPoint.X <= placementTarget.ActualWidth - anchorBorder.DockLength)
{
leftDockOffset = anchorBorder.AnchorOffset.X - (anchorBorder.DockLength / 2);
}
if (topLeftToTargetPoint.X > (placementTarget.ActualWidth - anchorBorder.DockLength))
{
leftDockOffset = (isAbove ? anchorBorder.CornerRadius.TopLeft : anchorBorder.CornerRadius.BottomLeft);
}
return(leftDockOffset);
}
private void Construct()
{
_contentPresenter = new ContentPresenter();
_anchorBorder = ConstructAnchorBorder();
_grid = new Grid();
_popup = ConstructPopup();
_anchorBorder.Child = _contentPresenter;
_grid.Children.Add(_anchorBorder);
_popup.Child = _grid;
}
private double GetDockOffset(AnchorBorder anchorBorder, FrameworkElement placementTarget, Point topLeftToTargetPoint, Point leftRightToTargetPoint, bool isAbove)
{
if (anchorBorder == null || placementTarget == null)
{
throw new ArgumentNullException(anchorBorder == null ? "anchorBorder" : "placementTarget");
}
if (DoubleUtil.GreaterThanOrClose(topLeftToTargetPoint.X, 0))
{
return(Math.Max(
_cornerRadius,
Math.Min(placementTarget.ActualWidth - topLeftToTargetPoint.X, anchorBorder.ActualWidth) / 2 - anchorBorder.DockLength / 2));
}
if (DoubleUtil.GreaterThanOrClose(anchorBorder.ActualWidth + topLeftToTargetPoint.X, 2 * _cornerRadius + anchorBorder.DockLength))
{
return(Math.Max(
_cornerRadius,
(anchorBorder.ActualWidth + topLeftToTargetPoint.X) / 2 - anchorBorder.DockLength + Math.Abs(topLeftToTargetPoint.X)));
}
return(anchorBorder.ActualWidth - _cornerRadius - anchorBorder.DockLength);
}
private Point GetAnchorOffset(AnchorBorder anchorBorder, FrameworkElement placementTarget, Point topLeftToTargetPoint, Point leftRightToTargetPoint, bool isAbove)
{
if (anchorBorder == null || placementTarget == null)
{
throw new ArgumentNullException(anchorBorder == null ? "anchorBorder" : "placementTarget");
}
var anchorYOffset = isAbove ? Math.Abs(anchorBorder.AnchorOffset.Y) : -Math.Abs(anchorBorder.AnchorOffset.Y);
if (DoubleUtil.GreaterThanOrClose(topLeftToTargetPoint.X, 0))
{
var validWidth = Math.Min(placementTarget.ActualWidth - topLeftToTargetPoint.X, anchorBorder.ActualWidth) / 2;
var anchorXOffset = Math.Min(validWidth, anchorBorder.DockOffset + anchorBorder.DockLength / 2);
return(new Point(anchorXOffset, anchorYOffset));
}
if (DoubleUtil.GreaterThanOrClose(anchorBorder.ActualWidth + topLeftToTargetPoint.X, 2 * _cornerRadius + anchorBorder.DockLength))
{
return(new Point(anchorBorder.DockOffset + anchorBorder.DockLength / 2, anchorYOffset));
}
return(new Point(Math.Abs(topLeftToTargetPoint.X), anchorYOffset));
}
