public PointF GetTextBoxSide(Point textboxIndex, TextBoxSides side)
{
PointF returnPoint = new PointF();
if (side == TextBoxSides.TopLeft || side == TextBoxSides.TopMiddle || side == TextBoxSides.TopRight)
{
returnPoint.Y = textboxes[textboxIndex.X, textboxIndex.Y].Top;
}
else if (side == TextBoxSides.RightMiddle || side == TextBoxSides.LeftMiddle)
{
returnPoint.Y = textboxes[textboxIndex.X, textboxIndex.Y].Location.Y + textboxes[textboxIndex.X, textboxIndex.Y].Size.Height / 2;
}
else
{
returnPoint.Y = textboxes[textboxIndex.X, textboxIndex.Y].Bottom;
}
if (side == TextBoxSides.BottomRight || side == TextBoxSides.RightMiddle || side == TextBoxSides.TopRight)
{
returnPoint.X = textboxes[textboxIndex.X, textboxIndex.Y].Right;
}
else if (side == TextBoxSides.TopMiddle || side == TextBoxSides.BottomMiddle)
{
returnPoint.X = textboxes[textboxIndex.X, textboxIndex.Y].Location.X + textboxes[textboxIndex.X, textboxIndex.Y].Size.Width / 2;
}
else
{
returnPoint.X = textboxes[textboxIndex.X, textboxIndex.Y].Left;
}
return(returnPoint);
}
public TextBoxSides OppositeSide(TextBoxSides side)
{
switch (side)
{
case (TextBoxSides.TopLeft):
return(TextBoxSides.BottomRight);
case (TextBoxSides.TopMiddle):
return(TextBoxSides.BottomMiddle);
case (TextBoxSides.TopRight):
return(TextBoxSides.BottomLeft);
case (TextBoxSides.RightMiddle):
return(TextBoxSides.LeftMiddle);
case (TextBoxSides.BottomRight):
return(TextBoxSides.TopLeft);
case (TextBoxSides.BottomMiddle):
return(TextBoxSides.TopMiddle);
case (TextBoxSides.BottomLeft):
return(TextBoxSides.TopRight);
default:
return(TextBoxSides.RightMiddle);
}
}
public void ShowTextBoxPath(Node <Point> textboxNode, Color color, Pen pen)
{
textboxes[textboxNode.Value.X, textboxNode.Value.Y].BackColor = color;
if (textboxNode.Children.Count > 0)
{
TextBoxSides connectingSide = OnWhatSide(textboxNode.Value, textboxNode.Children[0].Value);
TextBoxSides oppositeSide = OppositeSide(connectingSide);
PointF thisSide = GetTextBoxSide(textboxNode.Value, connectingSide);
PointF otherSide = GetTextBoxSide(textboxNode.Children[0].Value, oppositeSide);
Pen p = new Pen(pen.Color);
p.EndCap = System.Drawing.Drawing2D.LineCap.ArrowAnchor;
gfx.DrawLine(p, thisSide, otherSide);
ShowTextBoxPath(textboxNode.Children[0], color, pen);
}
}
