/// <summary>
/// Computes the position of the arrow texts, following the arrow, to avoid text overlap
/// </summary>
protected virtual void ComputeArrowTextPosition()
{
BoxAllocation allocatedBoxes = new BoxAllocation();
// Allocate all boxes as non available
foreach (BoxControl <TEnclosing, TBoxModel, TArrowModel> box in _boxes.Values)
{
Rectangle rectangle = box.Rectangle;
allocatedBoxes.Allocate(rectangle);
}
foreach (ArrowControl <TEnclosing, TBoxModel, TArrowModel> arrow in _arrows.Values)
{
Point center = arrow.GetCenter();
Point upSlide = Slide(allocatedBoxes, arrow, SlideDirection.Up);
Point downSlide = Slide(allocatedBoxes, arrow, SlideDirection.Down);
Rectangle boundingBox;
if (Distance(center, upSlide) <= Distance(center, downSlide))
{
boundingBox = arrow.GetTextBoundingBox(upSlide);
}
else
{
boundingBox = arrow.GetTextBoundingBox(downSlide);
}
arrow.Location = new Point(boundingBox.X, boundingBox.Y);
allocatedBoxes.Allocate(boundingBox);
}
}
/// <summary>
/// Tries to slide the arrow up following the arrow to avoid any collision
/// with the already allocated bounding boxes
/// </summary>
/// <param name="allocatedBoxes">The boxes that already have been allocated</param>
/// <param name="arrow">The arrow to consider</param>
/// <param name="direction">Indicates whether the sliding should be done upward or downard the arrow orientation</param>
/// <returns></returns>
private Point Slide(BoxAllocation allocatedBoxes, ArrowControl <TEnclosing, TBoxModel, TArrowModel> arrow, SlideDirection direction)
{
Point retVal = arrow.GetCenter();
Rectangle colliding = allocatedBoxes.Intersects(arrow.GetTextBoundingBox(retVal));
while (colliding != Rectangle.Empty)
{
retVal = arrow.Slide(retVal, colliding, direction);
colliding = allocatedBoxes.Intersects(arrow.GetTextBoundingBox(retVal));
}
return(retVal);
}
/// <summary>
/// Computes the position of the transition texts, following the transition arrow, to avoid text overlap
/// </summary>
private void ComputeTransitionTextPosition()
{
AllocatedBoxes = new BoxAllocation();
foreach (TransitionControl transition in transitions.Values)
{
Point center = transition.getCenter();
Point upSlide = Slide(transition, center, TransitionControl.SlideDirection.Up);
Point downSlide = Slide(transition, center, TransitionControl.SlideDirection.Down);
Rectangle boundingBox;
if (distance(center, upSlide) <= distance(center, downSlide))
{
boundingBox = transition.getTextBoundingBox(upSlide);
}
else
{
boundingBox = transition.getTextBoundingBox(downSlide);
}
transition.Location = new Point(boundingBox.X, boundingBox.Y);
AllocatedBoxes.Allocate(boundingBox);
}
}
/// <summary>
/// Computes the position of the transition texts, following the transition arrow, to avoid text overlap
/// </summary>
private void ComputeTransitionTextPosition()
{
AllocatedBoxes = new BoxAllocation();
foreach (TransitionControl transition in transitions.Values)
{
Point center = transition.getCenter();
Point upSlide = Slide(transition, center, TransitionControl.SlideDirection.Up);
Point downSlide = Slide(transition, center, TransitionControl.SlideDirection.Down);
Rectangle boundingBox;
if (distance(center, upSlide) <= distance(center, downSlide))
{
boundingBox = transition.getTextBoundingBox(upSlide);
}
else
{
boundingBox = transition.getTextBoundingBox(downSlide);
}
transition.Location = new Point(boundingBox.X, boundingBox.Y);
AllocatedBoxes.Allocate(boundingBox);
}
}
