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add API to Ruler to optionally draw a divider (2 single pixel horizontal lines) at some position within the vertical extent of the ruler

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This commit is contained in:
Paul Davis 2014-11-24 14:29:37 +02:00
parent 38728f0835
commit 4cf402bdcf
2 changed files with 33 additions and 1 deletions
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7
libs/canvas/canvas/ruler.h
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@ -65,7 +65,9 @@ public:
void set_metric (const Metric&);
void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
void set_divide_colors (Color top, Color bottom);
void set_divide_height (double);
private:
const Metric* _metric;
@ -74,6 +76,9 @@ private:
Coord _lower;
Coord _upper;
double _divide_height;
Color _divider_color_top;
Color _divider_color_bottom;
Pango::FontDescription* _font_description;
mutable std::vector<Mark> marks;

27
libs/canvas/ruler.cc
View file

@ -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)
{