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canvas: ruler never shows marks/text for points too close to display the label

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This commit is contained in:
Paul Davis 2022-10-31 16:57:04 -06:00
parent 19ab75f5e5
commit 0ef10e4f5f
1 changed files with 30 additions and 22 deletions
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52
libs/canvas/ruler.cc
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@ -161,6 +161,7 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (cr);
Pango::FontDescription* last_font_description = 0;
Coord prev = -1;
for (vector<Mark>::const_iterator m = marks.begin(); m != marks.end(); ++m) {
Duple pos;
@ -169,6 +170,33 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
pos.x = floor ((m->position - _lower) / _metric->units_per_pixel);
pos.y = self.y1; /* bottom edge */
if (fd != last_font_description) {
layout->set_font_description (*fd);
last_font_description = fd;
}
/* and the text */
if (!m->label.empty()) {
Pango::Rectangle logical;
layout->set_text (m->label);
logical = layout->get_pixel_logical_extents ();
if ((prev >= 0.) && ((pos.x - prev) < (6. + logical.get_width()))) {
continue;
}
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() + .5 * (height - logical.get_height()));
}
layout->show_in_cairo_context (cr);
prev = pos.x;
}
if (_outline_width == 1.0) {
/* Cairo single pixel line correction */
cr->move_to (pos.x + 0.5, pos.y);
@ -194,31 +222,11 @@ Ruler::render (Rect const & area, Cairo::RefPtr<Cairo::Context> cr) const
cr->rel_line_to (0, -height/5.0);
break;
}
cr->stroke ();
if (fd != last_font_description) {
layout->set_font_description (*fd);
last_font_description = fd;
}
/* and the text */
if (!m->label.empty()) {
Pango::Rectangle logical;
layout->set_text (m->label);
logical = layout->get_pixel_logical_extents ();
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() + .5 * (height - logical.get_height()));
}
layout->show_in_cairo_context (cr);
}
}
}
if (_divide_height >= 0.0) {
cr->set_line_width (1.0);