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canvas/ruler: provide option for a second font to be used for "major" marks

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This commit is contained in:
Paul Davis 2021-01-03 16:49:45 -07:00
parent d92d707180
commit 20029ec7e6
2 changed files with 27 additions and 3 deletions
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2
libs/canvas/canvas/ruler.h
View file

@ -67,6 +67,7 @@ public:
void set_range (double lower, double upper);
void set_font_description (Pango::FontDescription);
void set_second_font_description (Pango::FontDescription);
void set_metric (const Metric&);
void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
@ -85,6 +86,7 @@ private:
Gtkmm2ext::Color _divider_color_bottom;
Pango::FontDescription* _font_description;
Pango::FontDescription* _second_font_description;
mutable std::vector<Mark> marks;
mutable bool _need_marks;
};

28
libs/canvas/ruler.cc
View file

@ -38,6 +38,7 @@ Ruler::Ruler (Canvas* c, const Metric& m)
, _upper (0)
, _divide_height (-1.0)
, _font_description (0)
, _second_font_description (0)
, _need_marks (true)
{
}
@ -49,6 +50,7 @@ Ruler::Ruler (Canvas* c, const Metric& m, Rect const& r)
, _upper (0)
, _divide_height (-1.0)
, _font_description (0)
, _second_font_description (0)
, _need_marks (true)
{
}
@ -60,6 +62,7 @@ Ruler::Ruler (Item* parent, const Metric& m)
, _upper (0)
, _divide_height (-1.0)
, _font_description (0)
, _second_font_description (0)
, _need_marks (true)
{
}
@ -71,6 +74,7 @@ Ruler::Ruler (Item* parent, const Metric& m, Rect const& r)
, _upper (0)
, _divide_height (-1.0)
, _font_description (0)
, _second_font_description (0)
, _need_marks (true)
{
}
@ -94,6 +98,16 @@ Ruler::set_font_description (Pango::FontDescription fd)
end_visual_change ();
}
void
Ruler::set_second_font_description (Pango::FontDescription fd)
{
begin_visual_change ();
delete _second_font_description;
_second_font_description = new Pango::FontDescription (fd);
end_visual_change ();
}
void
Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
{
@ -144,12 +158,12 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
/* draw ticks + text */
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (cr);
if (_font_description) {
layout->set_font_description (*_font_description);
}
Pango::FontDescription* last_font_description = 0;
for (vector<Mark>::const_iterator m = marks.begin(); m != marks.end(); ++m) {
Duple pos;
Pango::FontDescription* fd = _font_description;
pos.x = floor ((m->position - _lower) / _metric->units_per_pixel);
pos.y = self.y1; /* bottom edge */
@ -168,6 +182,9 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
} else {
cr->rel_line_to (0, -height);
}
if (_second_font_description) {
fd = _second_font_description;
}
break;
case Mark::Minor:
cr->rel_line_to (0, -height/3.0);
@ -178,6 +195,11 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
}
cr->stroke ();
if (fd != last_font_description) {
layout->set_font_description (*fd);
last_font_description = fd;
}
/* and the text */
if (!m->label.empty()) {