fix crash when copy'ing latent plugins

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

diff --git a/libs/canvas/ruler.cc b/libs/canvas/ruler.cc
index 120ba845a5550d7a8d94a5e2c79ffddaefdcd98f..1c11def93a8b95a586cef2aa5c11b44ade1adc0b 100644 (file)
--- a/libs/canvas/ruler.cc
+++ b/libs/canvas/ruler.cc
@@ -33,36 +33,44 @@ using namespace ArdourCanvas;
 
 Ruler::Ruler (Canvas* c, const Metric& m)
        : Rectangle (c)
-       , _metric (m)
+       , _metric (&m)
        , _lower (0)
        , _upper (0)
+       , _divide_height (-1.0)
+       , _font_description (0)
        , _need_marks (true)
 {
 }
 
 Ruler::Ruler (Canvas* c, const Metric& m, Rect const& r)
        : Rectangle (c, r)
-       , _metric (m)
+       , _metric (&m)
        , _lower (0)
        , _upper (0)
+       , _divide_height (-1.0)
+       , _font_description (0)
        , _need_marks (true)
 {
 }
 
 Ruler::Ruler (Item* parent, const Metric& m)
        : Rectangle (parent)
-       , _metric (m)
+       , _metric (&m)
        , _lower (0)
        , _upper (0)
+       , _divide_height (-1.0)
+       , _font_description (0)
        , _need_marks (true)
 {
 }
 
 Ruler::Ruler (Item* parent, const Metric& m, Rect const& r)
        : Rectangle (parent, r)
-       , _metric (m)
+       , _metric (&m)
        , _lower (0)
        , _upper (0)
+       , _divide_height (-1.0)
+       , _font_description (0)
        , _need_marks (true)
 {
 }
@@ -81,6 +89,7 @@ void
 Ruler::set_font_description (Pango::FontDescription fd)
 {
        begin_visual_change ();
+       delete _font_description;
        _font_description = new Pango::FontDescription (fd);
        end_visual_change ();
 }
@@ -106,7 +115,7 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
 
        if (_need_marks) {
                marks.clear ();
-               _metric.get_marks (marks, _lower, _upper, 50);
+               _metric->get_marks (marks, _lower, _upper, 50);
                _need_marks = false;
        }
 
@@ -133,7 +142,7 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
        cr->stroke ();
 
        /* draw ticks + text */
-       
+
        Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (cr);
        if (_font_description) {
                layout->set_font_description (*_font_description);
@@ -142,7 +151,7 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
        for (vector<Mark>::const_iterator m = marks.begin(); m != marks.end(); ++m) {
                Duple pos;
 
-               pos.x = floor ((m->position - _lower) / _metric.units_per_pixel);
+               pos.x = floor ((m->position - _lower) / _metric->units_per_pixel);
                pos.y = self.y1; /* bottom edge */
 
                if (_outline_width == 1.0) {
@@ -151,16 +160,20 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
                } else {
                        cr->move_to (pos.x, pos.y);
                }
-               
+
                switch (m->style) {
                case Mark::Major:
-                       cr->rel_line_to (0, -height);
+                        if (_divide_height >= 0) {
+                                cr->rel_line_to (0, -_divide_height);
+                        } else {
+                                cr->rel_line_to (0, -height);
+                        }
                        break;
                case Mark::Minor:
-                       cr->rel_line_to (0, -height/2.0);
+                       cr->rel_line_to (0, -height/3.0);
                        break;
                case Mark::Micro:
-                       cr->rel_line_to (0, -height/4.0);
+                       cr->rel_line_to (0, -height/5.0);
                        break;
                }
                cr->stroke ();
@@ -172,11 +185,53 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
 
                        layout->set_text (m->label);
                        logical = layout->get_pixel_logical_extents ();
-                       
-                       cr->move_to (pos.x + 2.0, self.y0 + logical.get_y());
+
+                        if (_divide_height >= 0) {
+                                cr->move_to (pos.x + 2.0, self.y0 + _divide_height + logical.get_y() + 2.0); /* 2 pixel padding below divider */
+                        } else {
+                                cr->move_to (pos.x + 2.0, self.y0 + logical.get_y());
+                        }
                        layout->show_in_cairo_context (cr);
                }
        }
 
+        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-1.0+0.5);
+                cr->line_to (self.x1, self.y0 + _divide_height-1.0+0.5);
+                cr->stroke ();
+
+                set_source_rgba (cr, _divider_color_bottom);
+                cr->move_to (self.x0, self.y0 + _divide_height+0.5);
+                cr->line_to (self.x1, self.y0 + _divide_height+0.5);
+                cr->stroke ();
+
+
+        }
+
        /* done! */
 }
+
+void
+Ruler::set_divide_height (double h)
+{
+        _divide_height = h;
+}
+
+void
+Ruler::set_divide_colors (Color t, Color b)
+{
+        _divider_color_bottom = b;
+        _divider_color_top = t;
+}
+
+void
+Ruler::set_metric (const Metric& m)
+{
+        _metric = &m;
+        _need_marks = true;
+        redraw ();
+}