private ElementPosition AdjustFitWithinBounds(Rectangle element, Rectangle target, Rectangle bounding, PositionDirectionalHintData positionData, double gap = 0)
{
var alignmentEdge = positionData.AlignmentEdge;
var alignTargetEdge = positionData.AlignTargetEdge;
ElementPosition elementEstimate = new ElementPosition(element, positionData.TargetEdge, alignmentEdge);
if (!DirectionalHintFixed && !CoverTarget)
{
elementEstimate = FlipToFit(element, target, bounding, positionData, gap);
}
var outOfBounds = GetOutOfBoundsEdges(element, bounding);
if (alignTargetEdge)
{
// The edge opposite to the alignment edge might be out of bounds. Flip alignment to see if we can get it within bounds.
if (elementEstimate.AlignmentEdge != RectangleEdge.None && outOfBounds.IndexOf((RectangleEdge)((int)elementEstimate.AlignmentEdge * -1)) > -1)
{
var flippedElementEstimate = FlipAlignmentEdge(elementEstimate, target, gap);
if (IsRectangleWithinBounds(flippedElementEstimate.ElementRectangle, bounding))
{
return(flippedElementEstimate);
}
}
}
else
{
foreach (var direction in outOfBounds)
{
elementEstimate.ElementRectangle = AlignEdges(elementEstimate.ElementRectangle, bounding, direction);
}
}
return(elementEstimate);
}
private ElementPosition FlipAlignmentEdge(ElementPosition elementEstimate, Rectangle target, double gap)
{
var alignmentEdge = elementEstimate.AlignmentEdge;
var targetEdge = elementEstimate.TargetEdge;
var elementRectangle = elementEstimate.ElementRectangle;
var oppositeEdge = (RectangleEdge)((int)alignmentEdge * -1);
var newEstimate = EstimatePosition(elementRectangle, target, new PositionDirectionalHintData(targetEdge, oppositeEdge), gap);
return(new ElementPosition(newEstimate, targetEdge, oppositeEdge));
}
private CalloutBeakPositionedInfo FinalizeBeakPosition(ElementPosition elementPosition, Rectangle positionedBeak, Rectangle bounds)
{
var targetEdge = (RectangleEdge)((int)elementPosition.TargetEdge * -1);
var actualElement = new Rectangle(0, elementPosition.ElementRectangle.width, 0, elementPosition.ElementRectangle.height);
PartialRectangle returnValue = new PartialRectangle();
var returnEdge = FinalizeReturnEdge(
elementPosition.ElementRectangle,
elementPosition.AlignmentEdge != RectangleEdge.None ? elementPosition.AlignmentEdge : GetFlankingEdges(targetEdge).positiveEdge,
bounds);
switch (targetEdge)
{
case RectangleEdge.Bottom:
returnValue.bottom = GetEdgeValue(positionedBeak, targetEdge);
break;
case RectangleEdge.Left:
returnValue.left = GetEdgeValue(positionedBeak, targetEdge);
break;
case RectangleEdge.Right:
returnValue.right = GetEdgeValue(positionedBeak, targetEdge);
break;
case RectangleEdge.Top:
returnValue.top = GetEdgeValue(positionedBeak, targetEdge);
break;
}
switch (returnEdge)
{
case RectangleEdge.Bottom:
returnValue.bottom = GetRelativeEdgeDifference(positionedBeak, actualElement, returnEdge);
break;
case RectangleEdge.Left:
returnValue.left = GetRelativeEdgeDifference(positionedBeak, actualElement, returnEdge);
break;
case RectangleEdge.Right:
returnValue.right = GetRelativeEdgeDifference(positionedBeak, actualElement, returnEdge);
break;
case RectangleEdge.Top:
returnValue.top = GetRelativeEdgeDifference(positionedBeak, actualElement, returnEdge);
break;
}
return(new CalloutBeakPositionedInfo(
returnValue,
GetClosestEdge(elementPosition.TargetEdge, positionedBeak, actualElement),
targetEdge));
}