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Editor Summary: The view rectangle should never exceed the bounds of the scroll area.

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This commit is contained in:
Ben Loftis 2017-07-19 13:58:56 -05:00
parent 0cb44f9d56
commit 29002b9ac9
2 changed files with 38 additions and 10 deletions
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45
gtk2_ardour/editor_summary.cc
View file

@ -46,7 +46,7 @@ EditorSummary::EditorSummary (Editor* e)
: EditorComponent (e),
_start (0),
_end (1),
_overhang_fraction (0.1),
_overhang_fraction (0.02),
_x_scale (1),
_track_height (16),
_last_playhead (-1),
@ -116,6 +116,9 @@ EditorSummary::set_session (Session* s)
_session->EndTimeChanged.connect (_session_connections, invalidator (*this), boost::bind (&EditorSummary::set_background_dirty, this), gui_context());
_editor->selection->RegionsChanged.connect (sigc::mem_fun(*this, &EditorSummary::set_background_dirty));
}
_leftmost = _session->current_start_frame();
_rightmost = min (_session->nominal_frame_rate()*60*2, _session->current_start_frame() ); //always show at least 2 minutes
}
void
@ -135,9 +138,25 @@ EditorSummary::render_background_image ()
/* compute start and end points for the summary */
framecnt_t const session_length = _session->current_end_frame() - _session->current_start_frame ();
double const theoretical_start = _session->current_start_frame() - session_length * _overhang_fraction;
double theoretical_start = _session->current_start_frame() - session_length * _overhang_fraction;
double theoretical_end = _session->current_end_frame();
/* the summary should encompass the full extent of everywhere we've visited since the session was opened */
if ( _leftmost < theoretical_start)
theoretical_start = _leftmost;
if ( _rightmost > theoretical_end )
theoretical_end = _rightmost;
/* range-check */
_start = theoretical_start > 0 ? theoretical_start : 0;
_end = _session->current_end_frame() + session_length * _overhang_fraction;
_end = theoretical_end + session_length * _overhang_fraction;
/* calculate x scale */
if (_end != _start) {
_x_scale = static_cast<double> (get_width()) / (_end - _start);
} else {
_x_scale = 1;
}
/* compute track height */
int N = 0;
@ -153,13 +172,6 @@ EditorSummary::render_background_image ()
_track_height = (double) get_height() / N;
}
/* calculate x scale */
if (_end != _start) {
_x_scale = static_cast<double> (get_width()) / (_end - _start);
} else {
_x_scale = 1;
}
/* render tracks and regions */
double y = 0;
@ -221,6 +233,19 @@ EditorSummary::render (Cairo::RefPtr<Cairo::Context> const& ctx, cairo_rectangle
return;
}
/* maintain the leftmost and rightmost locations that we've ever reached */
framecnt_t const leftmost = _editor->leftmost_sample ();
if ( leftmost < _leftmost) {
_leftmost = leftmost;
_background_dirty = true;
}
framecnt_t const rightmost = leftmost + _editor->current_page_samples();
if ( rightmost > _rightmost) {
_rightmost = rightmost;
_background_dirty = true;
}
//draw the background (regions, markers, etc ) if they've changed
if (!_image || _background_dirty) {
render_background_image ();
_background_dirty = false;

3
gtk2_ardour/editor_summary.h
View file

@ -88,6 +88,9 @@ private:
framepos_t _start; ///< start frame of the overview
framepos_t _end; ///< end frame of the overview
framepos_t _leftmost; ///< the earliest frame we ever viewed
framepos_t _rightmost; ///< the latest frame we ever viewed
/** fraction of the session length by which the overview size should extend past the start and end markers */
double _overhang_fraction;