Version 5.0 The LEDA User Manual

void
gw.add edge menu(string label, gw action func)
appends action function func with label label to
the context menu for edges (opened by clicking
with the right mouse button on an edge).
void gw.set new node handler(bool (∗f)(GraphWin& , const point& ))
f(gw, p) is called every time before a node is to
be created at position p.
void
void
void
void
void
void
void
void
void
void
void
gw.set new node handler(void (∗f)(GraphWin& , node) = NULL)
f(gw, v) is called after node v has been created.
gw.set new edge handler(bool (∗f)(GraphWin& , node, node))
f(gw, v, w) is called before the edge (v, w) is to be
created.
gw.set new edge handler(void (∗f)(GraphWin& , edge) = NULL)
f(gw, e) is called after the edge e has been created.
gw.set start move node handler(bool (∗f)(GraphWin& , node) = NULL)
f(gw, v) is called before node v is to be moved.
gw.set move node handler(void (∗f)(GraphWin& , node) = NULL)
f(gw, v) is called every time node v reaches a new
position during a move operation.
gw.set end move node handler(void (∗f)(GraphWin& , node))
f(gw, v) is called after node v has been moved.
gw.set del node handler(bool (∗f)(GraphWin& , node))
f(gw, v) is called before the node v is to be
deleted.
gw.set del node handler(void (∗f)(GraphWin& ) = NULL)
f(gw) is called every time after a node was
deleted.
gw.set del edge handler(bool (∗f)(GraphWin& , edge))
f(gw, e) is called before the edge e is to be deleted.
gw.set del edge handler(void (∗f)(GraphWin& ) = NULL)
f(gw) is called every time after an edge was
deleted.
gw.set start edge slider handler(void (∗f)(GraphWin& , edge,
double) = NULL, int sl = 0)
f(gw, e, pos) is called before slider sl of edge e is to
be moved. Here pos is the current slider position.