add API to Ruler to optionally draw a divider (2 single pixel horizontal lines) at...

[ardour.git] / libs / canvas / ruler.cc

diff --git a/libs/canvas/ruler.cc b/libs/canvas/ruler.cc
index b11793cb7fa1d1a524049cfc1ea1f5d3375bdf9e..c5a08ed2830eaeb10218653e860bfcf53de03cbb 100644 (file)
--- a/libs/canvas/ruler.cc
+++ b/libs/canvas/ruler.cc
@@ -36,6 +36,7 @@ Ruler::Ruler (Canvas* c, const Metric& m)
        , _metric (&m)
        , _lower (0)
        , _upper (0)
+        , _divide_height (-1.0)
        , _need_marks (true)
 {
 }
@@ -45,6 +46,7 @@ Ruler::Ruler (Canvas* c, const Metric& m, Rect const& r)
        , _metric (&m)
        , _lower (0)
        , _upper (0)
+        , _divide_height (-1.0)
        , _need_marks (true)
 {
 }
@@ -54,6 +56,7 @@ Ruler::Ruler (Item* parent, const Metric& m)
        , _metric (&m)
        , _lower (0)
        , _upper (0)
+        , _divide_height (-1.0)
        , _need_marks (true)
 {
 }
@@ -63,6 +66,7 @@ Ruler::Ruler (Item* parent, const Metric& m, Rect const& r)
        , _metric (&m)
        , _lower (0)
        , _upper (0)
+        , _divide_height (-1.0)
        , _need_marks (true)
 {
 }
@@ -178,9 +182,32 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
                }
        }
 
+        if (_divide_height >= 0.0) {
+                
+                cr->set_line_width (1.0);
+
+                set_source_rgba (cr, _divider_color_top);
+                cr->move_to (self.x0, self.y0 + _divide_height+0.5);
+                cr->line_to (self.x1, self.y0 + _divide_height+0.5);
+                cr->stroke ();
+
+                set_source_rgba (cr, _divider_color_bottom);
+                cr->move_to (self.x0, self.y0 + _divide_height+1.5);
+                cr->line_to (self.x1, self.y0 + _divide_height+1.5);
+                cr->stroke ();
+
+
+        }
+
        /* done! */
 }
 
+void
+Ruler::set_divide_height (double h)
+{
+        _divide_height = h;
+}
+
 void
 Ruler::set_metric (const Metric& m)
 {