need some pointers

ok i got the source now here and looked up where the select tool has its
mouse_over. i now want to hang in a visual feedback of the path under
the select tool at GDK_ENTER_NOTIFY and GDK_LEAVE_NOTIFY in the file
select_context.c

the only show stopper i am now at is how to display specified path as an
XOR'ed overlay to the whole canvas. i found some functions in the gdk
library that seem usefull.

######

void        gdk_region_xor                  (GdkRegion *source1,
                                             GdkRegion *source2);

Sets the area of source1 to the exclusive-OR of the areas of source1 and
source2. The resulting area is the set of pixels contained in one or the
other of the two sources but not in both.

###### and ######

GdkRegion*  gdk_region_polygon              (GdkPoint *points,
                                             gint npoints,
                                             GdkFillRule fill_rule);

Creates a new GdkRegion using the polygon defined by a number of points.
points :an array of GdkPoint structs. npoints :	the number of elements
in the points array. fill_rule :specifies which pixels are included in
the region when the polygon overlaps itself. Returns :a new GdkRegion
based on the given polygon. 

######

ok and now my plan is to somehow get this to be able to be used by
sodipodi, i am sure an own function is appropriate here. i just dont
know how to get the ArtBpath converted into a gdk_region. maybe someone
can help me on this one.

markus
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