public bool FixRelations(DragablePoint point)
{
var atBeginning = Lines.Where(x => x.First == point).FirstOrDefault();
var atEnding = Lines.Where(x => x.Second == point).FirstOrDefault();
if (atBeginning == null || atEnding == null)
{
return(false);
}
if (atBeginning.Relation == Relation.NONE && atEnding.Relation == Relation.NONE)
{
return(true);
}
if (atBeginning.Relation != Relation.NONE)
{
FixRelationFromLine(atBeginning, true);
}
if (atEnding.Relation != Relation.NONE)
{
FixRelationFromLine(atEnding, false);
}
return(true);
}
public void AddPoint(DragablePoint point, int index = -1) // index is Line in which we insert point
{
if (Points.Count == 0)
{
Points.Add(point);
return;
}
if (index < 0)
{
if (Lines.Count > 0)
{
Lines.Last().Second = point;
}
else
{
Lines.Add(new Line(Points.First(), point));
}
Lines.Add(new Line(point, Points.First()));
Points.Add(point);
return;
}
else
{
var oldEnd = Lines[index].Second;
Lines[index].Second = point;
Lines.Insert(index + 1, new Line(point, oldEnd));
Points.Insert(index + 1, point);
}
}
public void AddMiddlePoint(object arg)
{
var line = arg as Line;
if (line == null)
{
return;
}
if (SelectedPolygon == null)
{
return;
}
line.RemoveRelation();
var index = SelectedPolygon.Lines.IndexOf(line);
var toAdd = new DragablePoint((line.First.X + line.Second.X) / 2, (line.First.Y + line.Second.Y) / 2);
SelectedPolygon.AddPoint(toAdd, index);
SelectedPolygon.RenderBitmap();
}
public void DeletePoint(DragablePoint point)
{
var pos = Points.IndexOf(point);
if (pos == -1)
{
return;
}
var atBeginning = Lines.Where(x => x.First == point).FirstOrDefault();
var atEnding = Lines.Where(x => x.Second == point).FirstOrDefault();
if (atBeginning != null && atEnding != null)
{
atBeginning.RemoveRelation();
atEnding.RemoveRelation();
DragablePoint toJoin = atBeginning.Second;
atEnding.Second = toJoin;
Lines.Remove(atBeginning);
}
Points.Remove(point);
}
public Line(DragablePoint first, DragablePoint second)
{
First = first;
Second = second;
}