/// <summary>
/// Updates the group boundary based on the nodes / notes selection.
/// </summary>
internal void UpdateBoundaryFromSelection()
{
var selectedModelsList = selectedModels.ToList();
if (selectedModelsList.Any())
{
var groupModels = selectedModelsList.OrderBy(x => x.X).ToList();
//Shifting x by 10 and y to the height of textblock
var regionX = groupModels.Min(x => x.X) - ExtendSize;
//Increase the Y value by 10. This provides the extra space between
// a model and textbox. Otherwise there will be some overlap
var regionY = groupModels.Min(y => y.Y) - ExtendSize - (TextBlockHeight == 0.0 ? MinTextHeight : TextBlockHeight);
//calculates the distance between the nodes
var xDistance = groupModels.Max(x => x.X) - regionX;
var yDistance = groupModels.Max(x => x.Y) - regionY;
var widthandheight = CalculateWidthAndHeight();
var maxWidth = widthandheight.Item1;
var maxHeight = widthandheight.Item2;
// InitialTop is to store the Y value without the Textblock height
this.InitialTop = groupModels.Min(y => y.Y);
var region = new Rect2D
{
X = regionX,
Y = regionY,
Width = xDistance + maxWidth + ExtendSize,
Height = yDistance + maxHeight + ExtendSize
};
this.X = region.X;
this.Y = region.Y;
this.Width = region.Width;
this.Height = region.Height;
//Calculate the boundary if there is any overlap
ModelBase overlap = null;
foreach (var nodes in SelectedModels)
{
if (!region.Contains(nodes.Rect))
{
overlap = nodes;
if (overlap.Rect.Top < this.X ||
overlap.Rect.Bottom > region.Bottom) //Overlap in height - increase the region height
{
if (overlap.Rect.Bottom - region.Bottom > 0)
{
this.Height += overlap.Rect.Bottom - region.Bottom + ExtendSize + ExtendYHeight;
}
region.Height = this.Height;
}
if (overlap.Rect.Left < this.Y ||
overlap.Rect.Right > region.Right) //Overlap in width - increase the region width
{
if (overlap.Rect.Right - region.Right > 0)
{
this.Width += overlap.Rect.Right - region.Right + ExtendSize;
}
region.Width = this.Width;
}
}
}
//Initial Height is to store the Actual height of the group.
//that is the height should be the initial height without the textblock height.
if (this.InitialHeight <= 0.0)
this.InitialHeight = region.Height;
}
else
{
this.Width = 0;
this.height = 0;
}
}
private static bool IsInRegion(Rect2D region, ILocatable locatable, bool fullyEnclosed)
{
double x0 = locatable.X;
double y0 = locatable.Y;
if (false == fullyEnclosed) // Cross selection.
{
var test = new Rect2D(x0, y0, locatable.Width, locatable.Height);
return region.IntersectsWith(test);
}
double x1 = x0 + locatable.Width;
double y1 = y0 + locatable.Height;
return (region.Contains(x0, y0) && region.Contains(x1, y1));
}
