/// <summary>
/// Check whether two labels overlap. Also calculate the horizontal and vertical offsets
/// to overcome the overlap.
/// </summary>
/// <param name="labelInfo">Information of the label</param>
/// <param name="verticalOffset">How much need to move vertically to overcome overlap</param>
/// <param name="horizontalOffset">How much need to move horizontally to overcome overlap</param>
/// <returns>OverlapTypes</returns>
private OverlapTypes CheckOverlap(CircularLabel label, out Double verticalOffset, out Double horizontalOffset)
{
OverlapTypes retValue = OverlapTypes.None; // Type of overlap
verticalOffset = 0; // How much need to move vertically to overcome overlap
horizontalOffset = 0; // How much need to move horizontally to overcome overlap
CircularLabel A = this;
CircularLabel B = label;
if (B.Position.Y > A.Position.Y)
{
if (B.Position.Y < A.Position.Y + A.Height)
{
// Calculate how much need to move vertically to overcome overlap
verticalOffset = A.Position.Y + A.Height - B.Position.Y;
retValue = OverlapTypes.Vertical;
}
}
else if (A.Position.Y > B.Position.Y)
{
if (A.Position.Y < B.Position.Y + B.Height)
{
// Calculate how much need to move vertically to overcome overlap
verticalOffset = B.Position.Y + B.Height - A.Position.Y;
retValue = OverlapTypes.Vertical;
}
}
if (B.Position.X > A.Position.X)
{
if (B.Position.X < A.Position.X + A.Width)
{
// Calculate how much need to move horizontally to overcome overlap
horizontalOffset = A.Position.X + A.Width - B.Position.X;
retValue = (retValue == OverlapTypes.Vertical) ? OverlapTypes.Both : OverlapTypes.Horizontal;
}
}
else if (A.Position.X > B.Position.X)
{
if (A.Position.X < B.Position.X + B.Width)
{
// Calculate how much need to move horizontally to overcome overlap
horizontalOffset = B.Position.X + B.Width - A.Position.X;
retValue = (retValue == OverlapTypes.Vertical) ? OverlapTypes.Both : OverlapTypes.Horizontal;
}
}
return(retValue);
}
/// <summary>
/// Ask for space to NextLabel if NextLabel can leave the space.
/// NextLabel B asks for space to the next label C.. and so on.
/// So this CircularLabel is looking for space.
/// </summary>
public void PlaceLabel(Boolean skip)
{
Double verticalOffset, horizontalOffset;
Boolean placedTowardsTop;
Boolean placedTowardsBottom;
Boolean isPlaced = false;
Int32 noOfIteration = 2;
OverlapTypes overlapTypesBottom = CheckOverLap(SweepDirection.Clockwise, out verticalOffset, out horizontalOffset);
if (overlapTypesBottom == OverlapTypes.Both)
{
placedTowardsTop = AskSpaceToPreviusLabel(this, verticalOffset / 2, noOfIteration);
placedTowardsBottom = AskSpaceToNextLabel(this, verticalOffset / 2, noOfIteration);
if (placedTowardsTop && placedTowardsBottom)
{
isPlaced = true;
}
else if (placedTowardsTop && !placedTowardsBottom)
{
placedTowardsTop = AskSpaceToPreviusLabel(this, verticalOffset / 2, noOfIteration);
isPlaced = placedTowardsTop;
}
else if (!placedTowardsTop && placedTowardsBottom)
{
placedTowardsBottom = AskSpaceToNextLabel(this, verticalOffset / 2, noOfIteration);
isPlaced = placedTowardsTop;
}
else
{
isPlaced = false;
}
}
else
{
OverlapTypes overlapTypesTop = CheckOverLap(SweepDirection.Counterclockwise, out verticalOffset, out horizontalOffset);
if (overlapTypesTop == OverlapTypes.Both)
{
placedTowardsBottom = AskSpaceToNextLabel(this, verticalOffset / 2, noOfIteration);
placedTowardsTop = AskSpaceToPreviusLabel(this, verticalOffset / 2, noOfIteration);
if (placedTowardsTop && placedTowardsBottom)
{
isPlaced = true;
}
else if (placedTowardsTop && !placedTowardsBottom)
{
placedTowardsTop = AskSpaceToNextLabel(this, verticalOffset / 2, noOfIteration);
isPlaced = placedTowardsTop;
}
else if (!placedTowardsTop && placedTowardsBottom)
{
placedTowardsBottom = AskSpaceToPreviusLabel(this, verticalOffset / 2, noOfIteration);
isPlaced = placedTowardsBottom;
}
else
{
isPlaced = false;
}
}
else
{
isPlaced = true;
}
}
if (isPlaced)
{
//ColorIt(Colors.Green);
}
else
{
//ColorIt(Colors.Red);
if (skip)
{
SkipLabel();
}
}
}
