using namespace std;
-#define MAX_CACHED_LINES 128
-
-TempoLines::TempoLines (ArdourCanvas::Canvas& canvas, ArdourCanvas::Group* group, double screen_height)
+TempoLines::TempoLines (ArdourCanvas::Canvas& canvas, ArdourCanvas::Group* group, double h)
: _canvas (canvas)
- , _group(group)
- , _clean_left(DBL_MAX)
- , _clean_right(0.0)
- , _height(screen_height)
+ , _group (group)
+ , _height (h)
{
}
void
TempoLines::tempo_map_changed()
{
- _clean_left = DBL_MAX;
- _clean_right = 0.0;
-
- double_t d = 1.0;
- // TODO: Dirty/slow, but 'needed' for zoom :(
- for (Lines::iterator i = _lines.begin(); i != _lines.end(); d += 1.0) {
- Lines::iterator next = i;
- ++next;
- i->second->set_x0 (-d);
- i->second->set_x1 (-d);
- ArdourCanvas::Line* f = i->second;
- _lines.erase(i);
- _lines.insert(make_pair(- d, f));
- i = next;
- }
+ /* remove all lines from the group, put them in the cache (to avoid
+ * unnecessary object destruction+construction later), and clear _lines
+ */
+
+ _group->clear ();
+ _cache.insert (_cache.end(), _lines.begin(), _lines.end());
+ _lines.clear ();
}
void
TempoLines::show ()
{
- for (Lines::iterator i = _lines.begin(); i != _lines.end(); ++i) {
- i->second->show();
- }
+ _group->show ();
}
void
TempoLines::hide ()
{
- for (Lines::iterator i = _lines.begin(); i != _lines.end(); ++i) {
- i->second->hide();
- }
+ _group->hide ();
}
void
double samples_per_pixel)
{
ARDOUR::TempoMap::BBTPointList::const_iterator i;
- ArdourCanvas::Line *line = 0;
- gdouble xpos;
+ ArdourCanvas::Rect const visible = _canvas.visible_area ();
double beat_density;
uint32_t beats = 0;
uint32_t bars = 0;
uint32_t color;
- const size_t needed = distance (begin, end);
-
- ArdourCanvas::Rect const visible = _canvas.visible_area ();
-
/* get the first bar spacing */
i = end;
i--;
- bars = (*i).bar - (*begin).bar;
+ bars = (*i).bar - (*begin).bar;
beats = distance (begin, end) - bars;
beat_density = (beats * 10.0f) / visible.width ();
return;
}
- xpos = rint(((framepos_t)(*i).frame) / (double)samples_per_pixel);
- const double needed_right = xpos;
-
- i = begin;
-
- xpos = rint(((framepos_t)(*i).frame) / (double)samples_per_pixel);
- const double needed_left = xpos;
-
- Lines::iterator left = _lines.lower_bound(xpos); // first line >= xpos
-
- bool exhausted = (left == _lines.end());
- Lines::iterator li = left;
- if (li != _lines.end())
- line = li->second;
-
- // Tempo map hasn't changed and we're entirely within a clean
- // range, don't need to do anything. Yay.
- if (needed_left >= _clean_left && needed_right <= _clean_right) {
- // cerr << endl << "*** LINE CACHE PERFECT HIT" << endl;
- return;
- }
-
- // cerr << endl << "*** LINE CACHE MISS" << endl;
-
- bool invalidated = false;
+ tempo_map_changed ();
for (i = begin; i != end; ++i) {
color = ARDOUR_UI::config()->get_canvasvar_MeasureLineBeat();
}
- xpos = rint(((framepos_t)(*i).frame) / (double)samples_per_pixel);
-
- li = _lines.lower_bound(xpos); // first line >= xpos
-
- line = (li != _lines.end()) ? li->second : 0;
- assert(!line || line->x0() == li->first);
-
- Lines::iterator next = li;
- if (next != _lines.end())
- ++next;
-
- exhausted = (next == _lines.end());
-
- // Hooray, line is perfect
- if (line && line->x0() == xpos) {
- if (li != _lines.end())
- ++li;
-
- line->set_outline_color (color);
-
- // Use existing line, moving if necessary
- } else if (!exhausted) {
- Lines::iterator steal = _lines.end();
- --steal;
-
- // Steal from the right
- if (left->first > needed_left && li != steal && steal->first > needed_right) {
- // cerr << "*** STEALING FROM RIGHT" << endl;
- double const x = steal->first;
- line = steal->second;
- _lines.erase(steal);
- line->set_x0 (xpos);
- line->set_x1 (xpos);
- line->set_outline_color (color);
- _lines.insert(make_pair(xpos, line));
- invalidated = true;
-
- // Shift clean range left
- _clean_left = min(_clean_left, xpos);
- _clean_right = min(_clean_right, x);
-
- // Move this line to where we need it
- } else {
- Lines::iterator existing = _lines.find(xpos);
- if (existing != _lines.end()) {
- //cout << "*** EXISTING LINE" << endl;
- li = existing;
- li->second->set_outline_color (color);
- } else {
- //cout << "*** MOVING LINE" << endl;
- const double x1 = line->x0();
- const bool was_clean = x1 >= _clean_left && x1 <= _clean_right;
- invalidated = invalidated || was_clean;
- // Invalidate clean portion (XXX: too harsh?)
- _clean_left = needed_left;
- _clean_right = needed_right;
- _lines.erase(li);
- line->set_outline_color (color);
- line->set_x0 (xpos);
- line->set_x1 (xpos);
- _lines.insert(make_pair(xpos, line));
- }
- }
-
- // Create a new line
- } else if (_lines.size() < needed || _lines.size() < MAX_CACHED_LINES) {
- // cerr << "*** CREATING LINE" << endl;
- /* if we already have a line there ... don't sweat it */
- if (_lines.find (xpos) == _lines.end()) {
- line = new ArdourCanvas::Line (_group);
- line->set_x0 (xpos);
- line->set_x1 (xpos);
- line->set_y0 (0.0);
- line->set_y1 (ArdourCanvas::COORD_MAX);
- line->set_outline_color (color);
- _lines.insert(make_pair(xpos, line));
- }
-
- // Steal from the left
+ ArdourCanvas::Coord xpos = rint(((framepos_t)(*i).frame) / (double)samples_per_pixel);
+
+ ArdourCanvas::Line* line;
+
+ if (!_cache.empty()) {
+ line = _cache.back ();
+ _cache.pop_back ();
+ line->reparent (_group);
} else {
- // cerr << "*** STEALING FROM LEFT" << endl;
- if (_lines.find (xpos) == _lines.end()) {
- Lines::iterator steal = _lines.begin();
- double const x = steal->first;
- line = steal->second;
- _lines.erase(steal);
- line->set_outline_color (color);
- line->set_x0 (xpos);
- line->set_x1 (xpos);
- _lines.insert(make_pair(xpos, line));
- invalidated = true;
-
- // Shift clean range right
- _clean_left = max(_clean_left, x);
- _clean_right = max(_clean_right, xpos);
- }
+ line = new ArdourCanvas::Line (_group);
+ CANVAS_DEBUG_NAME (line, "tempo measure line");
+ line->set_ignore_events (true);
}
- }
- // Extend range to what we've 'fixed'
- if (!invalidated) {
- _clean_left = min(_clean_left, needed_left);
- _clean_right = max(_clean_right, needed_right);
+ /* move to 0.5 offset to ensure single pixel lines (see Cairo
+ * FAQ for info on why we do this).
+ */
+
+ line->set_x0 (xpos + 0.5);
+ line->set_x1 (xpos + 0.5);
+ line->set_y0 (0.0);
+ line->set_y1 (_height);
+ line->set_outline_color (color);
+ line->show ();
}
}
projects / ardour.git / blobdiff