Version 5.0 The LEDA User Manual

int
bool
bool
gw.load layout(istream& istr)
read layout from stream istr.
gw.save layout(ostream& ostr)
save layout to stream ostr.
gw.save layout(string fname, bool ask override = false)
save layout to file fname.
h) Zooming
void gw.zoom(double f) zooms the window by factor f.
void gw.zoom area(double x0 , double y0 , double x1 , double y1 )
performs a zoom operation for the rectangular
area with current coordinates (x0, y0, x1, y0).
void gw.zoom graph( ) performs a zoom operation, such that the graph
fills the entire window.
void gw.unzoom( ) undoes last zoom operation.
i) Operations in Edit-mode
Before entering edit mode ...
gw action
gw action
gw.set action(long mask, gw action func)
gw.get action(long mask)
sets action associated with condition mask
to func and returns previous action for
this condition. Here gw action is the type
void (∗func)(GraphWin&, const point&). For
func = NULL the corresponding action is
deleted.
returns the action associated with condition
mask.
void gw.reset actions( ) resets all actions to their defaults.
void gw.clear actions( ) deletes all actions.
void
gw.add node menu(string label, gw action func)
appends action function func with label label to
the context menu for nodes (opened by clicking
with the right mouse button on a node).