using namespace std;
using namespace ArdourCanvas;
-Line::Line (Group* parent)
- : Item (parent)
- , Outline (parent)
+Line::Line (Canvas* c)
+ : Item (c)
{
+}
+Line::Line (Item* parent)
+ : Item (parent)
+{
}
void
Line::compute_bounding_box () const
{
Rect bbox;
-
+
bbox.x0 = min (_points[0].x, _points[1].x);
bbox.y0 = min (_points[0].y, _points[1].y);
bbox.x1 = max (_points[0].x, _points[1].x);
if (_outline_width <= 1.0) {
/* See Cairo FAQ on single pixel lines to understand why we add 0.5
*/
-
+
const Duple half_a_pixel (0.5, 0.5);
p0 = p0.translate (half_a_pixel);
p1 = p1.translate (half_a_pixel);
void
Line::set (Duple a, Duple b)
{
- begin_change ();
+ if (a != _points[0] || b != _points[1]) {
+ begin_change ();
- _points[0] = a;
- _points[1] = b;
+ _points[0] = a;
+ _points[1] = b;
- _bounding_box_dirty = true;
- end_change ();
-
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: line change\n");
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Line::set_x (Coord x0, Coord x1)
{
- begin_change ();
-
- _points[0].x = x0;
- _points[1].x = x1;
+ if (x0 != _points[0].x || x1 != _points[1].x) {
+ begin_change ();
- _bounding_box_dirty = true;
- end_change ();
+ _points[0].x = x0;
+ _points[1].x = x1;
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: line change\n");
-}
+ _bounding_box_dirty = true;
+ end_change ();
+ }
+}
void
Line::set_x0 (Coord x0)
{
- begin_change ();
-
- _points[0].x = x0;
+ if (x0 != _points[0].x) {
+ begin_change ();
- _bounding_box_dirty = true;
- end_change ();
+ _points[0].x = x0;
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: line change\n");
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Line::set_y0 (Coord y0)
{
- begin_change ();
+ if (y0 != _points[0].y) {
+ begin_change ();
- _points[0].y = y0;
+ _points[0].y = y0;
- _bounding_box_dirty = true;
- end_change ();
+ _bounding_box_dirty = true;
+ end_change ();
+ }
DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: line change\n");
}
void
Line::set_x1 (Coord x1)
{
- begin_change ();
-
- _points[1].x = x1;
+ if (x1 != _points[1].x) {
+ begin_change ();
- _bounding_box_dirty = true;
- end_change ();
+ _points[1].x = x1;
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: line change\n");
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
void
Line::set_y1 (Coord y1)
{
- begin_change ();
-
- _points[1].y = y1;
+ if (y1 != _points[1].y) {
+ begin_change ();
- _bounding_box_dirty = true;
- end_change ();
+ _points[1].y = y1;
- DEBUG_TRACE (PBD::DEBUG::CanvasItemsDirtied, "canvas item dirty: line change\n");
+ _bounding_box_dirty = true;
+ end_change ();
+ }
}
bool
Line::covers (Duple const & point) const
{
- const Duple p = canvas_to_item (point);
+ const Duple p = window_to_item (point);
static const Distance threshold = 2.0;
/* this quick check works for vertical and horizontal lines, which are
double t;
Duple a (_points[0]);
Duple b (_points[1]);
- const Rect visible (_canvas->visible_area());
+ const Rect visible (window_to_item (_canvas->visible_area()));
/*
Clamp the line endpoints to the visible area of the canvas. If we do