Initial import of gtk2_ardour.

git-svn-id: svn://localhost/trunk/ardour2@24 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 921 insertions, 0 deletions

diff --git a/gtk2_ardour/streamview.cc b/gtk2_ardour/streamview.cc
new file mode 100644
index 0000000000..021da1626b
--- /dev/null
+++ b/gtk2_ardour/streamview.cc
@@ -0,0 +1,921 @@
+#include <cmath>
+
+#include <gtk--.h>
+
+#include <gtkmmext/gtk_ui.h>
+
+#include <ardour/audioplaylist.h>
+#include <ardour/audioregion.h>
+#include <ardour/diskstream.h>
+#include <ardour/audio_track.h>
+#include <ardour/playlist_templates.h>
+#include <ardour/source.h>
+
+#include "streamview.h"
+#include "regionview.h"
+#include "audio_time_axis.h"
+#include "canvas-waveview.h"
+#include "canvas-simplerect.h"
+#include "region_selection.h"
+#include "selection.h"
+#include "public_editor.h"
+#include "ardour_ui.h"
+#include "crossfade_view.h"
+#include "rgb_macros.h"
+#include "extra_bind.h"
+#include "gui_thread.h"
+
+using namespace ARDOUR;
+using namespace Editing;
+
+StreamView::StreamView (AudioTimeAxisView& tv)
+	: _trackview (tv)
+{
+	region_color = _trackview.color();
+	crossfades_visible = true;
+
+	if (tv.is_audio_track()) {
+		/* TRACK */
+		//stream_base_color = RGBA_TO_UINT (222,223,218,255);
+		stream_base_color = color_map[cAudioTrackBase];
+	} else {
+		/* BUS */
+		//stream_base_color = RGBA_TO_UINT (230,226,238,255);
+		stream_base_color = color_map[cAudioBusBase];
+	}
+
+	/* set_position() will position the group */
+	
+	canvas_group = gtk_canvas_item_new (GTK_CANVAS_GROUP(_trackview.canvas_display),
+					    gtk_canvas_group_get_type (),
+					    NULL);
+
+	canvas_rect = gtk_canvas_item_new (GTK_CANVAS_GROUP(canvas_group),
+					   gtk_canvas_simplerect_get_type(),
+					   "x1", 0.0,
+					   "y1", 0.0,
+					   "x2", 1000000.0,
+					   "y2", (double) tv.height,
+					   "outline_color_rgba", color_map[cAudioTrackOutline],
+					   /* outline ends and bottom */
+					   "outline_what", (guint32) (0x1|0x2|0x8),
+					   "fill_color_rgba", stream_base_color,
+					   NULL);
+
+	gtk_signal_connect (GTK_OBJECT(canvas_rect), "event",
+			    (GtkSignalFunc) PublicEditor::canvas_stream_view_event, &_trackview);
+
+	_samples_per_unit = _trackview.editor.get_current_zoom();
+	_amplitude_above_axis = 1.0;
+
+	if (_trackview.is_audio_track()) {
+		_trackview.audio_track()->diskstream_changed.connect (slot (*this, &StreamView::diskstream_changed));
+		_trackview.session().TransportStateChange.connect (slot (*this, &StreamView::transport_changed));
+		_trackview.get_diskstream()->record_enable_changed.connect (slot (*this, &StreamView::rec_enable_changed));
+		_trackview.session().RecordEnabled.connect (slot (*this, &StreamView::sess_rec_enable_changed));
+		_trackview.session().RecordDisabled.connect (slot (*this, &StreamView::sess_rec_enable_changed));
+	} 
+
+	rec_updating = false;
+	rec_active = false;
+	use_rec_regions = tv.editor.show_waveforms_recording ();
+	last_rec_peak_frame = 0;
+}
+
+StreamView::~StreamView ()
+{
+	undisplay_diskstream ();
+	gtk_object_destroy (GTK_OBJECT(canvas_group));
+}
+
+void
+StreamView::attach ()
+{
+	if (_trackview.is_audio_track()) {
+		display_diskstream (_trackview.get_diskstream());
+	}
+}
+
+int
+StreamView::set_position (gdouble x, gdouble y)
+
+{
+	gtk_canvas_item_set (canvas_group, "x", x, "y", y, NULL);
+	return 0;
+}
+
+int
+StreamView::set_height (gdouble h)
+{
+	/* limit the values to something sane-ish */
+
+	if (h < 10.0 || h > 1000.0) {
+		return -1;
+	}
+
+	gtk_object_set (GTK_OBJECT(canvas_rect), "y2", h, NULL);
+
+	for (AudioRegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		(*i)->set_height (h);
+	}
+
+	for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		(*i)->set_height (h);
+	}
+
+	for (vector<RecBoxInfo>::iterator i = rec_rects.begin(); i != rec_rects.end(); ++i) {
+		RecBoxInfo &recbox = (*i);
+		gtk_object_set (GTK_OBJECT( recbox.rectangle ), "y2", h - 1, NULL);
+	}
+
+	return 0;
+}
+
+int 
+StreamView::set_samples_per_unit (gdouble spp)
+{
+	AudioRegionViewList::iterator i;
+
+	if (spp < 1.0) {
+		return -1;
+	}
+
+	_samples_per_unit = spp;
+
+	for (i = region_views.begin(); i != region_views.end(); ++i) {
+		(*i)->set_samples_per_unit (spp);
+	}
+
+	for (CrossfadeViewList::iterator xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
+		(*xi)->set_samples_per_unit (spp);
+	}
+
+	for (vector<RecBoxInfo>::iterator xi = rec_rects.begin(); xi != rec_rects.end(); ++xi) {
+		RecBoxInfo &recbox = (*xi);
+		
+		gdouble xstart = _trackview.editor.frame_to_pixel ( recbox.start );
+		gdouble xend = _trackview.editor.frame_to_pixel ( recbox.start + recbox.length );
+
+		gtk_canvas_item_set (recbox.rectangle, "x1", xstart, NULL);
+		gtk_canvas_item_set (recbox.rectangle, "x2", xend, NULL);
+	}
+
+	return 0;
+}
+
+int 
+StreamView::set_amplitude_above_axis (gdouble app)
+
+{
+	AudioRegionViewList::iterator i;
+
+	if (app < 1.0) {
+		return -1;
+	}
+
+	_amplitude_above_axis = app;
+
+	for (i = region_views.begin(); i != region_views.end(); ++i) {
+		(*i)->set_amplitude_above_axis (app);
+	}
+
+	return 0;
+}
+
+void
+StreamView::add_region_view (Region *r)
+{
+	add_region_view_internal (r, true);
+}
+
+void
+StreamView::add_region_view_internal (Region *r, bool wait_for_waves)
+{
+	ENSURE_GUI_THREAD (bind (slot (*this, &StreamView::add_region_view), r));
+
+	AudioRegion* region = dynamic_cast<AudioRegion*> (r);
+
+	if (region == 0) {
+		return;
+	}
+
+	AudioRegionView *region_view;
+	list<AudioRegionView *>::iterator i;
+
+	for (i = region_views.begin(); i != region_views.end(); ++i) {
+		if (&(*i)->region == region) {
+			
+			/* great. we already have a AudioRegionView for this Region. use it again.
+			 */
+
+			(*i)->set_valid (true);
+			return;
+		}
+	}
+
+	region_view = new AudioRegionView (GTK_CANVAS_GROUP(canvas_group),
+					   _trackview,
+					   *region,
+					   _samples_per_unit,
+					   _amplitude_above_axis, 
+					   region_color, 
+					   wait_for_waves);
+
+	region_views.push_front (region_view);
+	
+	/* follow global waveform setting */
+
+	region_view->set_waveform_visible(_trackview.editor.show_waveforms());
+
+	/* catch regionview going away */
+
+	region->GoingAway.connect (slot (*this, &StreamView::remove_region_view));
+	
+	AudioRegionViewAdded (region_view);
+}
+
+void
+StreamView::remove_region_view (Region *r)
+{
+	ENSURE_GUI_THREAD (bind (slot (*this, &StreamView::remove_region_view), r));
+
+	AudioRegion* ar = dynamic_cast<AudioRegion*> (r);
+
+	if (ar == 0) {
+		return;
+	}
+
+	for (list<AudioRegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		if (&((*i)->region) == ar) {
+			delete *i;
+			region_views.erase (i);
+			break;
+		}
+	}
+
+	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end();) {
+		list<CrossfadeView*>::iterator tmp;
+		
+		tmp = i;
+		++tmp;
+		
+		if ((*i)->crossfade.involves (*ar)) {
+			delete *i;
+			crossfade_views.erase (i);
+		}
+		
+		i = tmp;
+	}
+}
+
+void
+StreamView::remove_rec_region (Region *r)
+{
+	ENSURE_GUI_THREAD(bind (slot (*this, &StreamView::remove_rec_region), r));
+	
+	if (!Gtkmmext::UI::instance()->caller_is_gui_thread()) {
+		fatal << "region deleted from non-GUI thread!" << endmsg;
+		/*NOTREACHED*/
+	} 
+
+	AudioRegion* ar = dynamic_cast<AudioRegion*> (r);
+
+	if (ar == 0) {
+		return;
+	}
+
+	for (list<AudioRegion *>::iterator i = rec_regions.begin(); i != rec_regions.end(); ++i) {
+		if (*i == ar) {
+			rec_regions.erase (i);
+			break;
+		}
+	}
+}
+
+void
+StreamView::undisplay_diskstream ()
+{
+	for (AudioRegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		delete *i;
+	}
+
+	for (CrossfadeViewList::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		delete *i;
+	}
+
+	region_views.clear();
+	crossfade_views.clear ();
+}
+
+void
+StreamView::display_diskstream (DiskStream *ds)
+{
+	playlist_change_connection.disconnect();
+	playlist_changed (ds);
+	playlist_change_connection = ds->PlaylistChanged.connect (bind (slot (*this, &StreamView::playlist_changed), ds));
+}
+
+void
+StreamView::playlist_modified ()
+{
+	ENSURE_GUI_THREAD (slot (*this, &StreamView::playlist_modified));
+
+	/* if the playlist is modified, make sure xfades are on top and all the regionviews are stacked 
+	   correctly.
+	*/
+
+	for (AudioRegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		region_layered (*i);
+	}
+
+	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		gtk_canvas_item_raise_to_top ((*i)->get_canvas_group());
+	}
+}
+
+void
+StreamView::playlist_changed (DiskStream *ds)
+{
+	ENSURE_GUI_THREAD (bind (slot (*this, &StreamView::playlist_changed), ds));
+
+	/* disconnect from old playlist */
+
+	for (vector<SigC::Connection>::iterator i = playlist_connections.begin(); i != playlist_connections.end(); ++i) {
+		(*i).disconnect();
+	}
+	
+	playlist_connections.clear();
+	undisplay_diskstream ();
+
+	/* draw it */
+
+	redisplay_diskstream ();
+
+	/* catch changes */
+
+	playlist_connections.push_back (ds->playlist()->RegionAdded.connect (slot (*this, &StreamView::add_region_view)));
+	playlist_connections.push_back (ds->playlist()->RegionRemoved.connect (slot (*this, &StreamView::remove_region_view)));
+	playlist_connections.push_back (ds->playlist()->StateChanged.connect (slot (*this, &StreamView::playlist_state_changed)));
+	playlist_connections.push_back (ds->playlist()->Modified.connect (slot (*this, &StreamView::playlist_modified)));
+	playlist_connections.push_back (ds->playlist()->NewCrossfade.connect (slot (*this, &StreamView::add_crossfade)));
+}
+
+void
+StreamView::add_crossfade (Crossfade *crossfade)
+{
+	AudioRegionView* lview = 0;
+	AudioRegionView* rview = 0;
+
+	ENSURE_GUI_THREAD (bind (slot (*this, &StreamView::add_crossfade), crossfade));
+
+	/* first see if we already have a CrossfadeView for this Crossfade */
+
+	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		if (&(*i)->crossfade == crossfade) {
+			if (!crossfades_visible) {
+				(*i)->hide();
+			} else {
+				(*i)->show ();
+			}
+			(*i)->set_valid (true);
+			return;
+		}
+	}
+
+	/* create a new one */
+
+	for (list<AudioRegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		if (!lview && &((*i)->region) == &crossfade->out()) {
+			lview = *i;
+		}
+		if (!rview && &((*i)->region) == &crossfade->in()) {
+			rview = *i;
+		}
+	}
+
+	CrossfadeView *cv = new CrossfadeView (GTK_CANVAS_GROUP(_trackview.canvas_display),
+					       _trackview,
+					       *crossfade,
+					       _samples_per_unit,
+					       region_color,
+					       *lview, *rview);
+
+	crossfade->Invalidated.connect (slot (*this, &StreamView::remove_crossfade));
+	crossfade_views.push_back (cv);
+
+	if (!crossfades_visible) {
+		cv->hide ();
+	}
+}
+
+void
+StreamView::remove_crossfade (Crossfade *xfade)
+{
+	ENSURE_GUI_THREAD (bind (slot (*this, &StreamView::remove_crossfade), xfade));
+
+	for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		if (&(*i)->crossfade == xfade) {
+			delete *i;
+			crossfade_views.erase (i);
+			break;
+		}
+	}
+}
+
+void
+StreamView::playlist_state_changed (Change ignored)
+{
+	ENSURE_GUI_THREAD (bind (slot (*this, &StreamView::playlist_state_changed), ignored));
+
+	redisplay_diskstream ();
+}
+
+void
+StreamView::redisplay_diskstream ()
+{
+	list<AudioRegionView *>::iterator i, tmp;
+	list<CrossfadeView*>::iterator xi, tmpx;
+
+	for (i = region_views.begin(); i != region_views.end(); ++i) {
+		(*i)->set_valid (false);
+	}
+
+	for (xi = crossfade_views.begin(); xi != crossfade_views.end(); ++xi) {
+		(*xi)->set_valid (false);
+		if ((*xi)->visible()) {
+			(*xi)->show ();
+		}
+	}
+
+	if (_trackview.is_audio_track()) {
+		_trackview.get_diskstream()->playlist()->foreach_region (this, &StreamView::add_region_view);
+		_trackview.get_diskstream()->playlist()->foreach_crossfade (this, &StreamView::add_crossfade);
+	}
+
+	for (i = region_views.begin(); i != region_views.end(); ) {
+		tmp = i;
+		tmp++;
+
+		if (!(*i)->is_valid()) {
+			delete *i;
+			region_views.erase (i);
+		}
+
+		i = tmp;
+	}
+
+	for (xi = crossfade_views.begin(); xi != crossfade_views.end();) {
+		tmpx = xi;
+		tmpx++;
+
+		if (!(*xi)->valid()) {
+			delete *xi;
+			crossfade_views.erase (xi);
+		}
+
+		xi = tmpx;
+	}
+
+	/* now fix layering */
+
+	playlist_modified ();
+}
+
+void
+StreamView::diskstream_changed (void *src_ignored)
+{
+	AudioTrack *at;
+
+	if ((at = _trackview.audio_track()) != 0) {
+		DiskStream& ds = at->disk_stream();
+		/* XXX grrr: when will SigC++ allow me to bind references? */
+		Gtkmmext::UI::instance()->call_slot (bind (slot (*this, &StreamView::display_diskstream), &ds));
+	} else {
+		Gtkmmext::UI::instance()->call_slot (slot (*this, &StreamView::undisplay_diskstream));
+	}
+}
+
+void
+StreamView::apply_color (GdkColor& color, ColorTarget target)
+
+{
+	list<AudioRegionView *>::iterator i;
+
+	switch (target) {
+	case RegionColor:
+		region_color = color;
+		for (i = region_views.begin(); i != region_views.end(); ++i) {
+			(*i)->set_color (region_color);
+		}
+		// stream_base_color = RGBA_TO_UINT (color.red/256, color.green/256, color.blue/256, 255);
+		// gtk_canvas_item_set (canvas_rect, "fill_color_rgba", stream_base_color, NULL);
+		break;
+		
+	case StreamBaseColor:
+		// stream_base_color = RGBA_TO_UINT (color.red/256, color.green/256, color.blue/256, 255);
+		// gtk_canvas_item_set (canvas_rect, "fill_color_rgba", stream_base_color, NULL);
+		break;
+	}
+}
+
+void
+StreamView::set_show_waveforms (bool yn)
+{
+	for (list<AudioRegionView *>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+			(*i)->set_waveform_visible (yn);
+	}
+}
+
+void
+StreamView::set_selected_regionviews (AudioRegionSelection& regions)
+{
+	bool selected;
+
+	for (list<AudioRegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		
+		selected = false;
+		
+		for (AudioRegionSelection::iterator ii = regions.begin(); ii != regions.end(); ++ii) {
+			if (*i == *ii) {
+				selected = true;
+			}
+		}
+		
+		(*i)->set_selected (selected, this);
+	}
+}
+
+void
+StreamView::get_selectables (jack_nframes_t start, jack_nframes_t end, list<Selectable*>& results)
+{
+	for (list<AudioRegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		if ((*i)->region.coverage(start, end) != OverlapNone) {
+			results.push_back (*i);
+		}
+	}
+}
+
+void
+StreamView::get_inverted_selectables (Selection& sel, list<Selectable*>& results)
+{
+	for (list<AudioRegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		if (!sel.audio_regions.contains (*i)) {
+			results.push_back (*i);
+		}
+	}
+}
+
+void
+StreamView::set_waveform_shape (WaveformShape shape)
+{
+	for (AudioRegionViewList::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		(*i)->set_waveform_shape (shape);
+	}
+}		
+		
+void
+StreamView::region_layered (AudioRegionView* rv)
+{
+	gtk_canvas_item_lower_to_bottom (rv->get_canvas_group());
+
+	/* don't ever leave it at the bottom, since then it doesn't
+	   get events - the  parent group does instead ...
+	*/
+	
+	gtk_canvas_item_raise (rv->get_canvas_group(), rv->region.layer() + 1);
+}
+
+void
+StreamView::rec_enable_changed (void *src)
+{
+	Gtkmmext::UI::instance()->call_slot (slot (*this, &StreamView::setup_rec_box));
+}
+
+void
+StreamView::sess_rec_enable_changed ()
+{
+	Gtkmmext::UI::instance()->call_slot (slot (*this, &StreamView::setup_rec_box));
+}
+
+void
+StreamView::transport_changed()
+{
+	Gtkmmext::UI::instance()->call_slot (slot (*this, &StreamView::setup_rec_box));
+}
+
+void
+StreamView::setup_rec_box ()
+{
+	// cerr << _trackview.name() << " streamview SRB\n";
+
+	if (_trackview.session().transport_rolling()) {
+
+		// cerr << "\trolling\n";
+
+		if (!rec_active
+		    && _trackview.session().record_status() == Session::Recording
+		    && _trackview.get_diskstream()->record_enabled()) {
+
+			if (use_rec_regions && rec_regions.size() == rec_rects.size()) {
+				/* add a new region, but don't bother if they set use_rec_regions mid-record */
+
+				AudioRegion::SourceList sources;
+
+				for (list<SigC::Connection>::iterator prc = peak_ready_connections.begin(); prc != peak_ready_connections.end(); ++prc) {
+					(*prc).disconnect();
+				}
+				peak_ready_connections.clear();
+					
+				for (uint32_t n=0; n < _trackview.get_diskstream()->n_channels(); ++n) {
+					Source *src = (Source *) _trackview.get_diskstream()->write_source (n);
+					if (src) {
+						sources.push_back (src);
+						peak_ready_connections.push_back (src->PeakRangeReady.connect (bind (slot (*this, &StreamView::rec_peak_range_ready), src))); 
+					}
+				}
+
+				// handle multi
+				
+				jack_nframes_t start = 0;
+				if (rec_regions.size() > 0) {
+					start = rec_regions.back()->start() + _trackview.get_diskstream()->get_captured_frames(rec_regions.size()-1);
+				}
+				
+				AudioRegion * region = new AudioRegion(sources, start, 1 , "", 0, (Region::Flag)(Region::DefaultFlags | Region::DoNotSaveState), false);
+				region->set_position (_trackview.session().transport_frame(), this);
+				rec_regions.push_back (region);
+				/* catch it if it goes away */
+				region->GoingAway.connect (slot (*this, &StreamView::remove_rec_region));
+
+				/* we add the region later */
+			}
+			
+			/* start a new rec box */
+
+			AudioTrack* at;
+
+			at = _trackview.audio_track(); /* we know what it is already */
+			DiskStream& ds = at->disk_stream();
+			jack_nframes_t frame_pos = ds.current_capture_start ();
+			gdouble xstart = _trackview.editor.frame_to_pixel (frame_pos);
+			gdouble xend = xstart;
+			
+			GtkCanvasItem * rec_rect = gtk_canvas_item_new (GTK_CANVAS_GROUP(canvas_group),
+									gtk_canvas_simplerect_get_type(),
+									"x1", xstart,
+									"y1", 1.0,
+									"x2", xend,
+									"y2", (double) _trackview.height - 1,
+									"outline_color_rgba", color_map[cRecordingRectOutline],
+									"fill_color_rgba",  color_map[cRecordingRectFill],
+									NULL);
+			
+			RecBoxInfo recbox;
+			recbox.rectangle = rec_rect;
+			recbox.start = _trackview.session().transport_frame();
+			recbox.length = 0;
+			
+			rec_rects.push_back (recbox);
+			
+			screen_update_connection.disconnect();
+			screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (slot (*this, &StreamView::update_rec_box));	
+			rec_updating = true;
+			rec_active = true;
+
+		} else if (rec_active &&
+			   (_trackview.session().record_status() != Session::Recording ||
+			    !_trackview.get_diskstream()->record_enabled())) {
+
+			screen_update_connection.disconnect();
+			rec_active = false;
+			rec_updating = false;
+
+		}
+		
+	} else {
+
+		// cerr << "\tNOT rolling, rec_rects = " << rec_rects.size() << " rec_regions = " << rec_regions.size() << endl;
+
+		if (!rec_rects.empty() || !rec_regions.empty()) {
+
+			/* disconnect rapid update */
+			screen_update_connection.disconnect();
+
+			for (list<SigC::Connection>::iterator prc = peak_ready_connections.begin(); prc != peak_ready_connections.end(); ++prc) {
+				(*prc).disconnect();
+			}
+			peak_ready_connections.clear();
+
+			rec_updating = false;
+			rec_active = false;
+			last_rec_peak_frame = 0;
+			
+			/* remove temp regions */
+			for (list<AudioRegion*>::iterator iter=rec_regions.begin(); iter != rec_regions.end(); )
+			{
+				list<AudioRegion*>::iterator tmp;
+
+				tmp = iter;
+				++tmp;
+
+				/* this will trigger the remove_region_view */
+				delete *iter;
+
+				iter = tmp;
+			}
+			
+			rec_regions.clear();
+
+			// cerr << "\tclear " << rec_rects.size() << " rec rects\n";
+		
+
+			/* transport stopped, clear boxes */
+			for (vector<RecBoxInfo>::iterator iter=rec_rects.begin(); iter != rec_rects.end(); ++iter) {
+				RecBoxInfo &rect = (*iter);
+				gtk_object_destroy (GTK_OBJECT(rect.rectangle));
+			}
+			
+			rec_rects.clear();
+			
+		}
+	}
+}
+
+
+void
+StreamView::update_rec_box ()
+{
+	/* only update the last box */
+	if (rec_active && rec_rects.size() > 0) {
+		RecBoxInfo & rect = rec_rects.back();
+		jack_nframes_t at = _trackview.get_diskstream()->current_capture_end();
+		
+		rect.length = at - rect.start;
+
+		gdouble xstart = _trackview.editor.frame_to_pixel ( rect.start );
+		gdouble xend = _trackview.editor.frame_to_pixel ( at );
+
+		gtk_canvas_item_set (rect.rectangle, "x1", xstart, NULL);
+		gtk_canvas_item_set (rect.rectangle, "x2", xend, NULL);
+	}
+}
+
+AudioRegionView*
+StreamView::find_view (const AudioRegion& region)
+{
+	for (list<AudioRegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+
+		if (&(*i)->region == &region) {
+			return *i;
+		}
+	}
+	return 0;
+}
+	
+void
+StreamView::foreach_regionview (SigC::Slot1<void,AudioRegionView*> slot)
+{
+	for (list<AudioRegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
+		slot (*i);
+	}
+}
+
+void
+StreamView::foreach_crossfadeview (void (CrossfadeView::*pmf)(void))
+{
+	for (list<CrossfadeView*>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		((*i)->*pmf) ();
+	}
+}
+
+void
+StreamView::rec_peak_range_ready (jack_nframes_t start, jack_nframes_t cnt, Source * src)
+{
+	// this is called from the peak building thread
+
+	ENSURE_GUI_THREAD(bind (slot (*this, &StreamView::rec_peak_range_ready), start, cnt, src));
+	
+	if (rec_peak_ready_map.size() == 0 || start+cnt > last_rec_peak_frame) {
+		last_rec_peak_frame = start + cnt;
+	}
+
+	rec_peak_ready_map[src] = true;
+
+	if (rec_peak_ready_map.size() == _trackview.get_diskstream()->n_channels()) {
+		this->update_rec_regions ();
+		rec_peak_ready_map.clear();
+	}
+}
+
+void
+StreamView::update_rec_regions ()
+{
+	if (use_rec_regions) {
+
+		uint32_t n = 0;
+
+		for (list<AudioRegion*>::iterator iter = rec_regions.begin(); iter != rec_regions.end(); n++) {
+
+			list<AudioRegion*>::iterator tmp;
+
+			tmp = iter;
+			++tmp;
+
+			if ((GTK_OBJECT_FLAGS(GTK_OBJECT(rec_rects[n].rectangle)) & GTK_CANVAS_ITEM_VISIBLE) == 0) {
+				/* rect already hidden, this region is done */
+				iter = tmp;
+				continue;
+			}
+			
+			AudioRegion * region = (*iter);
+			jack_nframes_t origlen = region->length();
+
+			if (region == rec_regions.back() && rec_active) {
+
+				if (last_rec_peak_frame > region->start()) {
+
+					jack_nframes_t nlen = last_rec_peak_frame - region->start();
+
+					if (nlen != region->length()) {
+
+						region->freeze ();
+						region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
+						region->set_length (nlen, this);
+						region->thaw ("updated");
+
+						if (origlen == 1) {
+							/* our special initial length */
+							add_region_view_internal (region, false);
+						}
+
+						/* also update rect */
+						GtkCanvasItem * rect = rec_rects[n].rectangle;
+						gdouble xend = _trackview.editor.frame_to_pixel (region->position() + region->length());
+						gtk_canvas_item_set (rect, "x2", xend, NULL);
+					}
+				}
+
+			} else {
+
+				jack_nframes_t nlen = _trackview.get_diskstream()->get_captured_frames(n);
+
+				if (nlen != region->length()) {
+
+					if (region->source(0).length() >= region->start() + nlen) {
+
+						region->freeze ();
+						region->set_position (_trackview.get_diskstream()->get_capture_start_frame(n), this);
+						region->set_length (nlen, this);
+						region->thaw ("updated");
+						
+						if (origlen == 1) {
+							/* our special initial length */
+							add_region_view_internal (region, false);
+						}
+						
+						/* also hide rect */
+						GtkCanvasItem * rect = rec_rects[n].rectangle;
+						gtk_canvas_item_hide (rect);
+
+					}
+				}
+			}
+
+			iter = tmp;
+		}
+	}
+}
+
+void
+StreamView::show_all_xfades ()
+{
+	foreach_crossfadeview (&CrossfadeView::show);
+	crossfades_visible = true;
+}
+
+void
+StreamView::hide_all_xfades ()
+{
+	foreach_crossfadeview (&CrossfadeView::hide);
+	crossfades_visible = false;
+}
+
+void
+StreamView::hide_xfades_involving (AudioRegionView& rv)
+{
+	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		if ((*i)->crossfade.involves (rv.region)) {
+			(*i)->fake_hide ();
+		}
+	}
+}
+
+void
+StreamView::reveal_xfades_involving (AudioRegionView& rv)
+{
+	for (list<CrossfadeView *>::iterator i = crossfade_views.begin(); i != crossfade_views.end(); ++i) {
+		if ((*i)->crossfade.involves (rv.region) && (*i)->visible()) {
+			(*i)->show ();
+		}
+	}
+}