Version 5.0 The LEDA User Manual

template
string GW.set obj label(GeoBaseScene ∗ sc, void ∗ adr, string lb)
sets the label of the object at (∗adr) to lb.
template
string GW.set obj label(GeoBaseScene ∗ sc, typename T :: iterator it,
string lb)
sets the label of the object it points to to lb.
Object texts
The following operations can be used to add/retrieve objects of type geowin text to objects
in scenes. The class geowin text is used to store graphical representations of texts. It stores
a string (the text) and the following attributes:
Name Type Description
font type geowin font type font type
size double font size
text color color color of the text
user font string font name (if font type = user font)
x offset double offset in x-direction to drawing position
y offset double offset in y-direction to drawing position
The enumeration type geowin font type has the following set of integral constants:
roman font, bold font, italic font, fixed font and user font.
The class geowin text has the following constructors:
geowin_text(string t, double ox, double oy, geowin_font_type ft,
double sz, string uf, color c = black);
geowin_text(string t, geowin_font_type ft, double sz);
geowin_text(string t);
The arguments are: t - the text, ox, oy - the x/y offsets, ft - the font type, sz - the font
size, uf - the user font and c - the text color. If a text is associated with an object, it
will be drawn centered at the center of the bounding box of the object translated by the
x/y - offset parameters. Note that it is also possible to add texts to a whole scene and
to instances of class GeoWin. Then the x/y - offset parameters specify the position (see
add text operation).
template
bool GW.get obj text(GeoBaseScene ∗ sc, void ∗ adr, geowin text& gt)
Gets the text associated with the object at adr in the
container of scene sc and assigns it to gt. If no text
is associated with the object, false will be returned,
otherwise true.