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livetrax/gtk2_ardour/region_view.cc
Paul Davis ebf3762fa9 fix computation of silence text, and its display. it is still not on top of the canvas, which is a small problem 
git-svn-id: svn://localhost/ardour2/branches/3.0@8227 d708f5d6-7413-0410-9779-e7cbd77b26cf
2010-12-09 18:17:36 +00:00

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/*
Copyright (C) 2001-2006 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include <cassert>
#include <algorithm>
#include <gtkmm.h>
#include <gtkmm2ext/gtk_ui.h>
#include "ardour/playlist.h"
#include "ardour/audioregion.h"
#include "ardour/audiosource.h"
#include "ardour/audio_diskstream.h"
#include "ardour/session.h"
#include "ardour_ui.h"
#include "global_signals.h"
#include "canvas-noevent-text.h"
#include "streamview.h"
#include "region_view.h"
#include "automation_region_view.h"
#include "route_time_axis.h"
#include "simplerect.h"
#include "simpleline.h"
#include "waveview.h"
#include "public_editor.h"
#include "region_editor.h"
#include "ghostregion.h"
#include "route_time_axis.h"
#include "ui_config.h"
#include "utils.h"
#include "rgb_macros.h"
#include "gui_thread.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace Editing;
using namespace Gtk;
using namespace ArdourCanvas;
static const int32_t sync_mark_width = 9;
PBD::Signal1<void,RegionView*> RegionView::RegionViewGoingAway;
RegionView::RegionView (ArdourCanvas::Group* parent,
TimeAxisView& tv,
boost::shared_ptr<ARDOUR::Region> r,
double spu,
Gdk::Color const & basic_color,
bool automation)
: TimeAxisViewItem (r->name(), *parent, tv, spu, basic_color, r->position(), r->length(), false, automation,
TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowNameText|
TimeAxisViewItem::ShowNameHighlight| TimeAxisViewItem::ShowFrame))
, _region (r)
, sync_mark(0)
, sync_line(0)
, editor(0)
, current_visible_sync_position(0.0)
, valid(false)
, _enable_display(false)
, _pixel_width(1.0)
, in_destructor(false)
, wait_for_data(false)
, _silence_text (0)
, _time_converter(r->session().tempo_map(), r->position())
{
GhostRegion::CatchDeletion.connect (*this, invalidator (*this), ui_bind (&RegionView::remove_ghost, this, _1), gui_context());
}
RegionView::RegionView (const RegionView& other)
: sigc::trackable(other)
, TimeAxisViewItem (other)
, _silence_text (0)
, _time_converter(other._time_converter)
{
/* derived concrete type will call init () */
_region = other._region;
current_visible_sync_position = other.current_visible_sync_position;
valid = false;
_pixel_width = other._pixel_width;
GhostRegion::CatchDeletion.connect (*this, invalidator (*this), ui_bind (&RegionView::remove_ghost, this, _1), gui_context());
}
RegionView::RegionView (const RegionView& other, boost::shared_ptr<Region> other_region)
: sigc::trackable(other)
, TimeAxisViewItem (other)
, _silence_text (0)
, _time_converter(other._time_converter)
{
/* this is a pseudo-copy constructor used when dragging regions
around on the canvas.
*/
/* derived concrete type will call init () */
_region = other_region;
current_visible_sync_position = other.current_visible_sync_position;
valid = false;
_pixel_width = other._pixel_width;
GhostRegion::CatchDeletion.connect (*this, invalidator (*this), ui_bind (&RegionView::remove_ghost, this, _1), gui_context());
}
RegionView::RegionView (ArdourCanvas::Group* parent,
TimeAxisView& tv,
boost::shared_ptr<ARDOUR::Region> r,
double spu,
Gdk::Color const & basic_color,
bool recording,
TimeAxisViewItem::Visibility visibility)
: TimeAxisViewItem (r->name(), *parent, tv, spu, basic_color, r->position(), r->length(), recording, false, visibility)
, _region (r)
, sync_mark(0)
, sync_line(0)
, editor(0)
, current_visible_sync_position(0.0)
, valid(false)
, _enable_display(false)
, _pixel_width(1.0)
, in_destructor(false)
, wait_for_data(false)
, _silence_text (0)
, _time_converter(r->session().tempo_map(), r->position())
{
}
void
RegionView::init (Gdk::Color const & basic_color, bool wfd)
{
editor = 0;
valid = true;
in_destructor = false;
wait_for_data = wfd;
sync_mark = 0;
sync_line = 0;
sync_mark = 0;
sync_line = 0;
compute_colors (basic_color);
if (name_highlight) {
name_highlight->set_data ("regionview", this);
name_highlight->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_region_view_name_highlight_event), name_highlight, this));
if (frame_handle_start) {
frame_handle_start->set_data ("regionview", this);
frame_handle_start->set_data ("isleft", (void*) 1);
frame_handle_start->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_frame_handle_event), frame_handle_start, this));
frame_handle_start->raise_to_top();
}
if (frame_handle_end) {
frame_handle_end->set_data ("regionview", this);
frame_handle_end->set_data ("isleft", (void*) 0);
frame_handle_end->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_frame_handle_event), frame_handle_end, this));
frame_handle_end->raise_to_top();
}
}
if (name_pixbuf) {
name_pixbuf->set_data ("regionview", this);
name_pixbuf->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_region_view_name_event), name_pixbuf, this));
}
if (wfd) {
_enable_display = true;
}
set_height (trackview.current_height());
_region->PropertyChanged.connect (*this, invalidator (*this), ui_bind (&RegionView::region_changed, this, _1), gui_context());
group->signal_event().connect (sigc::bind (sigc::mem_fun (PublicEditor::instance(), &PublicEditor::canvas_region_view_event), group, this));
set_colors ();
ColorsChanged.connect (sigc::mem_fun (*this, &RegionView::color_handler));
/* XXX sync mark drag? */
}
RegionView::~RegionView ()
{
in_destructor = true;
for (vector<GhostRegion*>::iterator g = ghosts.begin(); g != ghosts.end(); ++g) {
delete *g;
}
for (list<ArdourCanvas::SimpleRect*>::iterator i = _coverage_frames.begin (); i != _coverage_frames.end (); ++i) {
delete *i;
}
drop_silent_frames ();
delete editor;
}
void
RegionView::set_silent_frames (const AudioIntervalResult& silences, double threshold)
{
framecnt_t shortest = max_framecnt;
framecnt_t shortest_audible = max_framecnt;
/* remove old silent frames */
drop_silent_frames ();
if (silences.empty()) {
return;
}
framepos_t start;
framepos_t end;
bool in_silence;
bool seen_audible = false;
AudioIntervalResult::const_iterator s;
uint32_t const color = ARDOUR_UI::config()->canvasvar_Silence.get();
start = _region->start();
s = silences.begin();
if (s->first == start) {
/* segment starting at zero is silent */
end = s->second;
in_silence = true;
} else {
/* segment starting at zero is audible, and begins at the start of the region in the source */
end = s->first;
in_silence = false;
}
while (start < _region->start() + _region->length()) {
framecnt_t interval_duration = end - start;
if (interval_duration > 0) {
if (in_silence) {
ArdourCanvas::SimpleRect* cr = new ArdourCanvas::SimpleRect (*group);
_silent_frames.push_back (cr);
/* coordinates for the rect are relative to the regionview origin */
cr->property_x1() = trackview.editor().frame_to_pixel (s->first - _region->start());
cr->property_x2() = trackview.editor().frame_to_pixel (s->second - _region->start());
cr->property_y1() = 1;
cr->property_y2() = _height - 2;
cr->property_outline_pixels() = 0;
cr->property_fill_color_rgba () = color;
if (interval_duration < shortest) {
shortest = interval_duration;
}
} else if (interval_duration > 0) {
seen_audible = true;
if (interval_duration < shortest_audible) {
shortest_audible = interval_duration;
}
}
start = end;
in_silence = !in_silence;
++s;
if (s == silences.end()) {
end = _region->start() + _region->length();
} else {
end = s->first;
}
}
}
_silence_text = new ArdourCanvas::NoEventText (*group);
_silence_text->property_font_desc() = *(get_font_for_style (N_("SilenceText")));
_silence_text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_SilenceText.get();
_silence_text->property_anchor() = ANCHOR_NW;
/* both positions are relative to the region start offset in source */
_silence_text->property_x() = trackview.editor().frame_to_pixel (silences.front().first - _region->start()) + 10.0;
_silence_text->property_y() = 20.0;
double ms;
char const * sunits;
char const * noun;
if (silences.size() > 1) {
noun = _("silent segments");
} else {
noun = _("silent segment");
}
ms = (float) shortest/_region->session().frame_rate();
/* ms are now in seconds */
if (ms >= 60.0) {
sunits = _("minutes");
ms /= 60.0;
} else if (ms < 1.0) {
sunits = _("msecs");
ms *= 1000.0;
} else {
sunits = _("secs");
}
if (seen_audible) {
/* ms are now in seconds */
double ma = shortest_audible / _region->session().frame_rate();
char const * aunits;
if (ma >= 60.0) {
aunits = _("minutes");
ma /= 60.0;
} else if (ma < 1.0) {
aunits = _("msecs");
ma *= 1000.0;
} else {
aunits = _("secs");
}
_silence_text->property_text() = string_compose (_("%1 %2, shortest = %3 %4\n (shortest audible segment = %5 %6)"),
silences.size(), noun,
ms, sunits, ma, aunits).c_str();
} else {
_silence_text->property_text() = string_compose (_("%1 %2, shortest = %3 %4"),
silences.size(), noun, ms, sunits).c_str();
}
}
void
RegionView::hide_silent_frames ()
{
for (list<ArdourCanvas::SimpleRect*>::iterator i = _silent_frames.begin (); i != _silent_frames.end (); ++i) {
(*i)->hide ();
}
_silence_text->hide();
}
void
RegionView::drop_silent_frames ()
{
for (list<ArdourCanvas::SimpleRect*>::iterator i = _silent_frames.begin (); i != _silent_frames.end (); ++i) {
delete *i;
}
_silent_frames.clear ();
delete _silence_text;
_silence_text = 0;
}
gint
RegionView::_lock_toggle (ArdourCanvas::Item*, GdkEvent* ev, void* arg)
{
switch (ev->type) {
case GDK_BUTTON_RELEASE:
static_cast<RegionView*>(arg)->lock_toggle ();
return TRUE;
break;
default:
break;
}
return FALSE;
}
void
RegionView::lock_toggle ()
{
_region->set_locked (!_region->locked());
}
void
RegionView::region_changed (const PropertyChange& what_changed)
{
ENSURE_GUI_THREAD (*this, &RegionView::region_changed, what_changed);
if (what_changed.contains (ARDOUR::bounds_change)) {
region_resized (what_changed);
region_sync_changed ();
}
if (what_changed.contains (ARDOUR::Properties::muted)) {
region_muted ();
}
if (what_changed.contains (ARDOUR::Properties::opaque)) {
region_opacity ();
}
if (what_changed.contains (ARDOUR::Properties::name)) {
region_renamed ();
}
if (what_changed.contains (ARDOUR::Properties::sync_position)) {
region_sync_changed ();
}
if (what_changed.contains (ARDOUR::Properties::locked)) {
region_locked ();
}
}
void
RegionView::region_locked ()
{
/* name will show locked status */
region_renamed ();
}
void
RegionView::region_resized (const PropertyChange& what_changed)
{
double unit_length;
if (what_changed.contains (ARDOUR::Properties::position)) {
set_position (_region->position(), 0);
_time_converter.set_origin_b (_region->position());
}
PropertyChange s_and_l;
s_and_l.add (ARDOUR::Properties::start);
s_and_l.add (ARDOUR::Properties::length);
if (what_changed.contains (s_and_l)) {
set_duration (_region->length(), 0);
unit_length = _region->length() / samples_per_unit;
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
(*i)->set_duration (unit_length);
}
}
}
void
RegionView::reset_width_dependent_items (double pixel_width)
{
TimeAxisViewItem::reset_width_dependent_items (pixel_width);
_pixel_width = pixel_width;
}
void
RegionView::region_muted ()
{
set_frame_color ();
region_renamed ();
}
void
RegionView::region_opacity ()
{
set_frame_color ();
}
void
RegionView::raise_to_top ()
{
_region->raise_to_top ();
}
void
RegionView::lower_to_bottom ()
{
_region->lower_to_bottom ();
}
bool
RegionView::set_position (framepos_t pos, void* /*src*/, double* ignored)
{
double delta;
bool ret;
if (!(ret = TimeAxisViewItem::set_position (pos, this, &delta))) {
return false;
}
if (ignored) {
*ignored = delta;
}
if (delta) {
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
(*i)->group->move (delta, 0.0);
}
}
return ret;
}
void
RegionView::set_samples_per_unit (gdouble spu)
{
TimeAxisViewItem::set_samples_per_unit (spu);
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
(*i)->set_samples_per_unit (spu);
(*i)->set_duration (_region->length() / samples_per_unit);
}
region_sync_changed ();
}
bool
RegionView::set_duration (framecnt_t frames, void *src)
{
if (!TimeAxisViewItem::set_duration (frames, src)) {
return false;
}
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
(*i)->set_duration (_region->length() / samples_per_unit);
}
return true;
}
void
RegionView::set_colors ()
{
TimeAxisViewItem::set_colors ();
if (sync_mark) {
sync_mark->property_fill_color_rgba() = RGBA_TO_UINT(0,255,0,255); // fill_color; // FIXME make a themeable colour
sync_line->property_fill_color_rgba() = RGBA_TO_UINT(0,255,0,255); // fill_color; // FIXME make a themeable colour
}
}
void
RegionView::set_frame_color ()
{
if (_region->opaque()) {
fill_opacity = 130;
} else {
fill_opacity = 60;
}
TimeAxisViewItem::set_frame_color ();
}
void
RegionView::fake_set_opaque (bool yn)
{
if (yn) {
fill_opacity = 130;
} else {
fill_opacity = 60;
}
set_frame_color ();
}
void
RegionView::show_region_editor ()
{
if (editor == 0) {
editor = new RegionEditor (trackview.session(), region());
}
editor->present ();
editor->show_all();
}
void
RegionView::hide_region_editor()
{
if (editor) {
editor->hide_all ();
}
}
std::string
RegionView::make_name () const
{
std::string str;
// XXX nice to have some good icons for this
if (_region->locked()) {
str += '>';
str += _region->name();
str += '<';
} else if (_region->position_locked()) {
str += '{';
str += _region->name();
str += '}';
} else {
str = _region->name();
}
if (_region->muted()) {
str = string ("!") + str;
}
return str;
}
void
RegionView::region_renamed ()
{
std::string str = make_name ();
set_item_name (str, this);
set_name_text (str);
reset_width_dependent_items (_pixel_width);
}
void
RegionView::region_sync_changed ()
{
int sync_dir;
framecnt_t sync_offset;
sync_offset = _region->sync_offset (sync_dir);
if (sync_offset == 0) {
/* no need for a sync mark */
if (sync_mark) {
sync_mark->hide();
sync_line->hide ();
}
return;
}
if (!sync_mark) {
/* points set below */
sync_mark = new ArdourCanvas::Polygon (*group);
sync_mark->property_fill_color_rgba() = RGBA_TO_UINT(0,255,0,255); // fill_color; // FIXME make a themeable colour
sync_line = new ArdourCanvas::Line (*group);
sync_line->property_fill_color_rgba() = RGBA_TO_UINT(0,255,0,255); // fill_color; // FIXME make a themeable colour
sync_line->property_width_pixels() = 1;
}
/* this has to handle both a genuine change of position, a change of samples_per_unit,
and a change in the bounds of the _region->
*/
if (sync_offset == 0) {
/* no sync mark - its the start of the region */
sync_mark->hide();
sync_line->hide ();
} else {
if ((sync_dir < 0) || ((sync_dir > 0) && (sync_offset > _region->length()))) {
/* no sync mark - its out of the bounds of the region */
sync_mark->hide();
sync_line->hide ();
} else {
/* lets do it */
Points points;
//points = sync_mark->property_points().get_value();
double offset = sync_offset / samples_per_unit;
points.push_back (Gnome::Art::Point (offset - ((sync_mark_width-1)/2), 1));
points.push_back (Gnome::Art::Point (offset + ((sync_mark_width-1)/2), 1));
points.push_back (Gnome::Art::Point (offset, sync_mark_width - 1));
points.push_back (Gnome::Art::Point (offset - ((sync_mark_width-1)/2), 1));
sync_mark->property_points().set_value (points);
sync_mark->show ();
points.clear ();
points.push_back (Gnome::Art::Point (offset, 0));
points.push_back (Gnome::Art::Point (offset, trackview.current_height() - NAME_HIGHLIGHT_SIZE));
sync_line->property_points().set_value (points);
sync_line->show ();
}
}
}
void
RegionView::move (double x_delta, double y_delta)
{
if (!_region->can_move() || (x_delta == 0 && y_delta == 0)) {
return;
}
get_canvas_group()->move (x_delta, y_delta);
/* note: ghosts never leave their tracks so y_delta for them is always zero */
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
(*i)->group->move (x_delta, 0.0);
}
}
void
RegionView::remove_ghost_in (TimeAxisView& tv)
{
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
if (&(*i)->trackview == &tv) {
delete *i;
break;
}
}
}
void
RegionView::remove_ghost (GhostRegion* ghost)
{
if (in_destructor) {
return;
}
for (vector<GhostRegion*>::iterator i = ghosts.begin(); i != ghosts.end(); ++i) {
if (*i == ghost) {
ghosts.erase (i);
break;
}
}
}
uint32_t
RegionView::get_fill_color ()
{
return fill_color;
}
void
RegionView::set_height (double h)
{
TimeAxisViewItem::set_height(h);
if (sync_line) {
Points points;
int sync_dir;
framecnt_t sync_offset;
sync_offset = _region->sync_offset (sync_dir);
double offset = sync_offset / samples_per_unit;
points.push_back (Gnome::Art::Point (offset, 0));
points.push_back (Gnome::Art::Point (offset, h - NAME_HIGHLIGHT_SIZE));
sync_line->property_points().set_value (points);
}
for (list<ArdourCanvas::SimpleRect*>::iterator i = _coverage_frames.begin(); i != _coverage_frames.end(); ++i) {
(*i)->property_y2() = h + 1;
}
for (list<ArdourCanvas::SimpleRect*>::iterator i = _silent_frames.begin(); i != _silent_frames.end(); ++i) {
(*i)->property_y2() = h + 1;
}
}
/** Remove old coverage frames and make new ones, if we're in a LayerDisplay mode
* which uses them. */
void
RegionView::update_coverage_frames (LayerDisplay d)
{
/* remove old coverage frames */
for (list<ArdourCanvas::SimpleRect*>::iterator i = _coverage_frames.begin (); i != _coverage_frames.end (); ++i) {
delete *i;
}
_coverage_frames.clear ();
if (d != Stacked) {
/* don't do coverage frames unless we're in stacked mode */
return;
}
boost::shared_ptr<Playlist> pl (_region->playlist ());
if (!pl) {
return;
}
framepos_t const position = _region->first_frame ();
framepos_t t = position;
framepos_t const end = _region->last_frame ();
ArdourCanvas::SimpleRect* cr = 0;
bool me = false;
uint32_t const color = frame->property_fill_color_rgba ();
uint32_t const base_alpha = UINT_RGBA_A (color);
while (t < end) {
t++;
/* is this region is on top at time t? */
bool const new_me = (pl->top_unmuted_region_at (t) == _region);
/* finish off any old rect, if required */
if (cr && me != new_me) {
cr->property_x2() = trackview.editor().frame_to_pixel (t - position);
}
/* start off any new rect, if required */
if (cr == 0 || me != new_me) {
cr = new ArdourCanvas::SimpleRect (*group);
_coverage_frames.push_back (cr);
cr->property_x1() = trackview.editor().frame_to_pixel (t - position);
cr->property_y1() = 1;
cr->property_y2() = _height + 1;
cr->property_outline_pixels() = 0;
/* areas that will be played get a lower alpha */
uint32_t alpha = base_alpha;
if (new_me) {
alpha /= 2;
}
cr->property_fill_color_rgba () = UINT_RGBA_CHANGE_A (color, alpha);
}
t = pl->find_next_region_boundary (t, 1);
me = new_me;
}
if (cr) {
/* finish off the last rectangle */
cr->property_x2() = trackview.editor().frame_to_pixel (end - position);
}
if (frame_handle_start) {
frame_handle_start->raise_to_top ();
}
if (frame_handle_end) {
frame_handle_end->raise_to_top ();
}
if (name_highlight) {
name_highlight->raise_to_top ();
}
if (name_pixbuf) {
name_pixbuf->raise_to_top ();
}
}
void
RegionView::trim_front (framepos_t new_bound, bool no_overlap)
{
if (_region->locked()) {
return;
}
RouteTimeAxisView& rtv = dynamic_cast<RouteTimeAxisView&> (trackview);
double const speed = rtv.track()->speed ();
framepos_t const pre_trim_first_frame = _region->first_frame();
_region->trim_front ((framepos_t) (new_bound * speed), this);
if (no_overlap) {
// Get the next region on the left of this region and shrink/expand it.
boost::shared_ptr<Playlist> playlist (_region->playlist());
boost::shared_ptr<Region> region_left = playlist->find_next_region (pre_trim_first_frame, End, 0);
bool regions_touching = false;
if (region_left != 0 && (pre_trim_first_frame == region_left->last_frame() + 1)) {
regions_touching = true;
}
// Only trim region on the left if the first frame has gone beyond the left region's last frame.
if (region_left != 0 && (region_left->last_frame() > _region->first_frame() || regions_touching)) {
region_left->trim_end (_region->first_frame() - 1, this);
}
}
region_changed (ARDOUR::bounds_change);
}
void
RegionView::trim_end (framepos_t new_bound, bool no_overlap)
{
if (_region->locked()) {
return;
}
RouteTimeAxisView& rtv = dynamic_cast<RouteTimeAxisView&> (trackview);
double const speed = rtv.track()->speed ();
framepos_t const pre_trim_last_frame = _region->last_frame();
_region->trim_end ((framepos_t) (new_bound * speed), this);
if (no_overlap) {
// Get the next region on the right of this region and shrink/expand it.
boost::shared_ptr<Playlist> playlist (_region->playlist());
boost::shared_ptr<Region> region_right = playlist->find_next_region (pre_trim_last_frame, Start, 1);
bool regions_touching = false;
if (region_right != 0 && (pre_trim_last_frame == region_right->first_frame() - 1)) {
regions_touching = true;
}
// Only trim region on the right if the last frame has gone beyond the right region's first frame.
if (region_right != 0 && (region_right->first_frame() < _region->last_frame() || regions_touching)) {
region_right->trim_front (_region->last_frame() + 1, this);
}
region_changed (ARDOUR::bounds_change);
} else {
region_changed (PropertyChange (ARDOUR::Properties::length));
}
}
void
RegionView::thaw_after_trim ()
{
if (_region->locked()) {
return;
}
_region->resume_property_changes ();
}
void
RegionView::trim_contents (framepos_t frame_delta, bool left_direction, bool swap_direction)
{
if (_region->locked()) {
return;
}
framepos_t new_bound;
RouteTimeAxisView& rtv = dynamic_cast<RouteTimeAxisView&> (trackview);
double const speed = rtv.track()->speed ();
if (left_direction) {
if (swap_direction) {
new_bound = (framepos_t) (_region->position() / speed) + frame_delta;
} else {
new_bound = (framepos_t) (_region->position() / speed) - frame_delta;
}
} else {
if (swap_direction) {
new_bound = (framepos_t) (_region->position() / speed) - frame_delta;
} else {
new_bound = (framepos_t) (_region->position() / speed) + frame_delta;
}
}
_region->trim_start ((framepos_t) (new_bound * speed), this);
region_changed (PropertyChange (ARDOUR::Properties::start));
}
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