internal static Point CalculateDropLocation(Point mousePosition, Point originalDropLocation, Size droppedSize, Point srcLocation, Point destLocation, Size srcSize, Size destSize, HashSet <Point> shapeLocations)
{
Point dropLocation = originalDropLocation;
double distToSrc = DesignerGeometryHelper.ManhattanDistanceBetweenPoints(mousePosition, new Point(srcLocation.X + (srcSize.Width / 2), srcLocation.Y + (srcSize.Height / 2)));
double distToDest = DesignerGeometryHelper.ManhattanDistanceBetweenPoints(mousePosition, new Point(destLocation.X + (destSize.Width / 2), destLocation.Y + (destSize.Height / 2)));
AutoSplitAlignment srcAlignment = GetAlignment(mousePosition, srcLocation, srcSize);
AutoSplitAlignment destAlignment = GetAlignment(mousePosition, destLocation, destSize);
if ((distToSrc <= distToDest || destAlignment == AutoSplitAlignment.None) && srcAlignment == AutoSplitAlignment.Vertical)
{
dropLocation = CalculateDropLocationToAlignVertically(dropLocation, droppedSize, srcLocation, srcSize);
}
else if ((distToSrc <= distToDest || destAlignment == AutoSplitAlignment.None) && srcAlignment == AutoSplitAlignment.Horizontal)
{
dropLocation = CalculateDropLocationToAlignHorizontally(dropLocation, droppedSize, srcLocation, srcSize);
}
else if ((distToSrc >= distToDest || srcAlignment == AutoSplitAlignment.None) && destAlignment == AutoSplitAlignment.Vertical)
{
dropLocation = CalculateDropLocationToAlignVertically(dropLocation, droppedSize, destLocation, destSize);
}
else if ((distToSrc >= distToDest || srcAlignment == AutoSplitAlignment.None) && destAlignment == AutoSplitAlignment.Horizontal)
{
dropLocation = CalculateDropLocationToAlignHorizontally(dropLocation, droppedSize, destLocation, destSize);
}
dropLocation.X = dropLocation.X < 0 ? 0 : dropLocation.X;
dropLocation.Y = dropLocation.Y < 0 ? 0 : dropLocation.Y;
// To avoid overlaps with existing shapes
if (shapeLocations != null)
{
while (shapeLocations.Contains(dropLocation))
{
dropLocation.Offset(FreeFormPanel.GridSize, FreeFormPanel.GridSize);
}
}
return(dropLocation);
}
private void MeasureChildren(out double height, out double width)
{
height = 0;
width = 0;
Point pt = new Point(0, 0);
bool isOutmostPanel = this.IsOutmostPanel();
foreach (UIElement child in Children)
{
Connector connectorChild = child as Connector;
if (connectorChild != null && isOutmostPanel)
{
pt = new Point(0, 0);
if (measureConnectors)
{
Point srcPoint = FreeFormPanel.GetLocationRelativeToOutmostPanel(FreeFormPanel.GetSourceConnectionPoint(connectorChild));
Point destPoint = FreeFormPanel.GetLocationRelativeToOutmostPanel(FreeFormPanel.GetDestinationConnectionPoint(connectorChild));
if (connectorChild.Points.Count == 0 || !this.Disabled &&
((DesignerGeometryHelper.ManhattanDistanceBetweenPoints(connectorChild.Points[0], srcPoint) > ConnectorRouter.EndPointTolerance) ||
(DesignerGeometryHelper.ManhattanDistanceBetweenPoints(connectorChild.Points[connectorChild.Points.Count - 1], destPoint) > ConnectorRouter.EndPointTolerance)))
{
connectorChild.Points = new PointCollection();
RoutePolyLine(connectorChild);
}
connectorChild.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
}
else
{
continue;
}
}
else //Measure non-connector elements.
{
child.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
if (!child.DesiredSize.Equals(((Size)FreeFormPanel.GetChildSize(child))))
{
FreeFormPanel.SetChildSize(child, child.DesiredSize);
}
pt = FreeFormPanel.GetLocation(child);
if (!IsLocationValid(pt))
{
pt = new Point(LeftStackingMargin, lastYPosition);
OnLocationChanged(child, new LocationChangedEventArgs(pt));
FreeFormPanel.SetLocation(child, pt);
lastYPosition += child.DesiredSize.Height + VerticalStackingDistance;
}
}
if (height < child.DesiredSize.Height + pt.Y)
{
height = child.DesiredSize.Height + pt.Y;
}
if (width < child.DesiredSize.Width + pt.X)
{
width = child.DesiredSize.Width + pt.X;
}
}
width = (width < this.MinWidth) ? this.MinWidth : width;
height = (height < this.MinHeight) ? this.MinHeight : height;
}