// handles connection's creation
public override void DoCreationFixup(bool converted)
{
// get coords of intermediate points
Point[] p = GuiPathFinder.polyline_quadric_DummyWay(conn.first, conn.second, conn.parent.active_objects);
// fixup the number of points
while (p.Length + 2 > conn.ipoints.Count)
{
if (converted)
{
conn.insert_point_child(0);
}
else
{
conn.insert_point(0);
}
}
while (p.Length + 2 < conn.ipoints.Count)
{
if (converted)
{
conn.remove_point_child(1);
}
else
{
conn.remove_point(1);
}
}
// change coords
for (int i = 0; i < p.Length; i++)
{
(conn.ipoints[i + 1] as GuiIntermPoint).x = p[i].X;
(conn.ipoints[i + 1] as GuiIntermPoint).y = p[i].Y;
}
}
// user moves conn_point
private void fixup_quadric_endpoint_movement(GuiConnectionPoint conn_point)
{
GuiPoint neighbour;
int x, y;
if (conn.ipoints.Count == 2)
{
int dx = conn.first.x - conn.second.x, dy = conn.first.y - conn.second.y;
GuiIntermPoint pt = null;
if (dx != 0 && dy != 0)
{
pt = conn.insert_point(0);
conn.add_child(pt, null);
GuiPathFinder.select_pos_for_middle_point(conn.first, conn.second, out x, out y);
pt.x = x;
pt.y = y;
}
}
else if (conn.ipoints.Count == 3)
{
GuiIntermPoint pt = conn.ipoints[1] as GuiIntermPoint;
GuiPathFinder.select_pos_for_middle_point(conn.first, conn.second, out x, out y);
pt.x = x;
pt.y = y;
}
else if (conn.ipoints.Count >= 3)
{
bool vertical;
if (conn_point == conn.first)
{
neighbour = conn.ipoints[1] as GuiPoint;
vertical = neighbour.x - (conn.ipoints[2] as GuiPoint).x == 0;
}
else
{
neighbour = conn.ipoints[conn.ipoints.Count - 2] as GuiPoint;
vertical = neighbour.x - (conn.ipoints[conn.ipoints.Count - 3] as GuiPoint).x == 0;
}
vertical = !vertical; // we have to invert the value to obtain the direction of the segment being moved
if (vertical)
{
neighbour.x = conn_point.x;
}
else
{
neighbour.y = conn_point.y;
}
}
}