using namespace ArdourCanvas;
-PolyLine::PolyLine (Group* parent)
- : Item (parent)
- , PolyItem (parent)
+PolyLine::PolyLine (Canvas* c)
+ : PolyItem (c)
, _threshold (1.0)
{
+}
+PolyLine::PolyLine (Item* parent)
+ : PolyItem (parent)
+ , _threshold (1.0)
+{
}
void
}
}
+void
+PolyLine::set_steps (Points const & points, bool stepped)
+{
+ if (!stepped) {
+ PolyItem::set(points);
+ return;
+ }
+
+ Points copy;
+ for (Points::const_iterator p = points.begin(); p != points.end();) {
+ Points::const_iterator next = p;
+ ++next;
+
+ copy.push_back(*p);
+ if (next != points.end() && next->x != p->x) {
+ copy.push_back(Duple(next->x, p->y));
+ }
+
+ p = next;
+ }
+
+ PolyItem::set(copy);
+}
+
bool
PolyLine::covers (Duple const & point) const
{
- Duple p = canvas_to_item (point);
+ Duple p = window_to_item (point);
const Points::size_type npoints = _points.size();
-
+
if (npoints < 2) {
return false;
}
/* repeat for each line segment */
- const Rect visible (_canvas->visible_area());
+ const Rect visible (window_to_item (_canvas->visible_area()));
for (i = 1, j = 0; i < npoints; ++i, ++j) {
double t;
Duple a (_points[j]);
Duple b (_points[i]);
-
+
/*
Clamp the line endpoints to the visible area of the canvas. If we do
not do this, we may have a line segment extending to COORD_MAX and our
math goes wrong.
*/
-
+
a.x = std::min (a.x, visible.x1);
a.y = std::min (a.y, visible.y1);
b.x = std::min (b.x, visible.x1);
b.y = std::min (b.y, visible.y1);
-
+
double d = distance_to_segment_squared (p, a, b, t, at);
-
+
if (t < 0.0 || t > 1.0) {
continue;
}
-
+
if (d < _threshold + _outline_width) {
return true;
}
-
+
}
-
+
return false;
}