Version 5.0 The LEDA User Manual

void
GW.set selected objects(GeoEditScene ∗ sc,
const list& LIT )
selects the objects of scene sc described by the contents
of container LIT .
template
void GW.set selected objects(GeoEditScene ∗ sc)
selects all objects of scene sc.
template
void GW.set selected objects(GeoEditScene ∗ sc,
const rectangle& R)
selects all objects of scene sc contained in rectangle
R.
void GW.edit( ) starts the interactive mode of GW . The operation returns
if either the DONE or Quit button was pressed.
bool
void
GW.edit(geo scene sc)
edits scene sc. Returns false if the Quit-Button was
pressed, true otherwise.
GW.register window(window& win, bool (∗ev fcn)(window ∗ w, int event,
int but, double x, double y))
if you enter the interactive mode of GW in an application,
but you want to handle events of other windows
as well, you can register a callback function ev fcn
for your other window win that will be called when
events associated with win occur. The parameters of
ev fcn are the window causing the event, the event
that ocurred, the button and the x and y coordinates
of the position in win. The handler ev fcn has to return
true if the interactive mode of GeoWin has to be
stopped, false otherwise.
Simple Animations
The following operation can be used to perform simple animations. One can animate the
movement of selected objects of a scene. This can be done in the following way: select
a number of objects in an edit scene; then start the animation by calling the animate
member function. The second parameter of this member function is an object anim of
type geowin animation, the first parameter is the scene that will be animated. The object
anim has to be derived from the abstract base class geowin animation. The derived class
has to overwrite some methods of the base class:
class geowin_animation {
public:
virtual void init(const GeoWin&) { }
virtual void finish(const GeoWin&) { }