Initial import of gtk2_ardour.

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

1 files changed, 263 insertions, 0 deletions

diff --git a/gtk2_ardour/crossfade_view.cc b/gtk2_ardour/crossfade_view.cc
new file mode 100644
index 0000000000..e074e7626c
--- /dev/null
+++ b/gtk2_ardour/crossfade_view.cc
@@ -0,0 +1,263 @@
+/*
+    Copyright (C) 2003 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.
+
+    $Id$
+*/
+
+#include <algorithm>
+
+#include <ardour/region.h>
+#include <gtkmmext/doi.h>
+
+#include "canvas-simplerect.h"
+#include "canvas-curve.h"
+#include "crossfade_view.h"
+#include "rgb_macros.h"
+#include "audio_time_axis.h"
+#include "public_editor.h"
+#include "regionview.h"
+#include "utils.h"
+
+using namespace SigC;
+using namespace ARDOUR;
+using namespace Editing;
+
+SigC::Signal1<void,CrossfadeView*> CrossfadeView::GoingAway;
+
+CrossfadeView::CrossfadeView (GtkCanvasGroup *parent, 
+			      AudioTimeAxisView &tv, 
+			      Crossfade& xf, 
+			      double spu,
+			      GdkColor& basic_color,
+			      AudioRegionView& lview,
+			      AudioRegionView& rview)
+			      
+
+	: TimeAxisViewItem ("xf.name()", parent, tv, spu, basic_color, xf.position(), 
+			    xf.overlap_length(), TimeAxisViewItem::Visibility (TimeAxisViewItem::ShowFrame)),
+	  crossfade (xf),
+	  left_view (lview),
+	  right_view (rview)
+	
+{
+	_valid = true;
+	_visible = true;
+
+	fade_in = gtk_canvas_item_new (GTK_CANVAS_GROUP(group),
+				       gtk_canvas_line_get_type(),
+				       "fill_color_rgba", color_map[cCrossfadeLine],
+					"width_pixels", (guint) 1,
+				       NULL);
+
+	fade_out = gtk_canvas_item_new (GTK_CANVAS_GROUP(group),
+					gtk_canvas_line_get_type(),
+					"fill_color_rgba", color_map[cCrossfadeLine],
+					"width_pixels", (guint) 1,
+					NULL);
+	
+	set_height (get_time_axis_view().height);
+
+	/* no frame around the xfade or overlap rects */
+
+	gtk_canvas_item_set (frame, "outline_what", 0, NULL);
+
+	/* never show the vestigial frame */
+
+	gtk_canvas_item_hide (vestigial_frame);
+	show_vestigial = false;
+
+	gtk_object_set_data (GTK_OBJECT(group), "crossfadeview", this);
+	gtk_signal_connect (GTK_OBJECT(group), "event",
+			    (GtkSignalFunc) PublicEditor::canvas_crossfade_view_event,
+			    this);
+
+	crossfade_changed (Change (~0));
+
+	crossfade.StateChanged.connect (slot (*this, &CrossfadeView::crossfade_changed));
+}
+
+CrossfadeView::~CrossfadeView ()
+{
+	 GoingAway (this) ; /* EMIT_SIGNAL */
+}
+
+std::string
+CrossfadeView::get_item_name ()
+{
+	return "xfade";
+//	return crossfade.name();
+}
+
+void
+CrossfadeView::reset_width_dependent_items (double pixel_width)
+{
+	TimeAxisViewItem::reset_width_dependent_items (pixel_width);
+
+	active_changed ();
+
+	if (pixel_width < 5) {
+		gtk_canvas_item_hide (fade_in);
+		gtk_canvas_item_hide (fade_out);
+	}
+}
+
+void
+CrossfadeView::set_height (double height)
+{
+	if (height == TimeAxisView::Smaller ||
+		height == TimeAxisView::Small)
+		TimeAxisViewItem::set_height (height - 3 );
+	else
+		TimeAxisViewItem::set_height (height - NAME_HIGHLIGHT_SIZE - 3 );
+
+	redraw_curves ();
+}
+
+void
+CrossfadeView::crossfade_changed (Change what_changed)
+{
+	bool need_redraw_curves = false;
+
+	if (what_changed & BoundsChanged) {
+		set_position (crossfade.position(), this);
+		set_duration (crossfade.overlap_length(), this);
+		need_redraw_curves = true;
+	}
+	
+	if (what_changed & Crossfade::ActiveChanged) {
+		/* calls redraw_curves */
+		active_changed ();
+	} else if (need_redraw_curves) {
+		redraw_curves ();
+	}
+}
+
+void
+CrossfadeView::redraw_curves ()
+{
+	GtkCanvasPoints* points; 
+	int32_t npoints;
+	float* vec;
+	
+	double h;
+
+	/*
+	 At "height - 3.0" the bottom of the crossfade touches the name highlight or the bottom of the track (if the
+	 track is either Small or Smaller.
+	 */
+	switch(get_time_axis_view().height) {
+		case TimeAxisView::Smaller:
+		case TimeAxisView::Small:
+			h = get_time_axis_view().height - 3.0;
+			break;
+
+		default:
+			h = get_time_axis_view().height - NAME_HIGHLIGHT_SIZE - 3.0;
+	}
+
+	if (h < 0) {
+		/* no space allocated yet */
+		return;
+	}
+
+	npoints = get_time_axis_view().editor.frame_to_pixel (crossfade.length());
+	npoints = std::min (gdk_screen_width(), npoints);
+
+	if (!_visible || !crossfade.active() || npoints < 3) {
+		gtk_canvas_item_hide (fade_in);
+		gtk_canvas_item_hide (fade_out);
+		return;
+	} else {
+		gtk_canvas_item_show (fade_in);
+		gtk_canvas_item_show (fade_out);
+	} 
+
+	points = get_canvas_points ("xfade edit redraw", npoints);
+	vec = new float[npoints];
+
+	crossfade.fade_in().get_vector (0, crossfade.length(), vec, npoints);
+	for (int i = 0, pci = 0; i < npoints; ++i) {
+		points->coords[pci++] = i;
+		points->coords[pci++] = 2.0 + h - (h * vec[i]);
+	}
+	gtk_canvas_item_set (fade_in, "points", points, NULL);
+
+	crossfade.fade_out().get_vector (0, crossfade.length(), vec, npoints);
+	for (int i = 0, pci = 0; i < npoints; ++i) {
+		points->coords[pci++] = i;
+		points->coords[pci++] = 2.0 + h - (h * vec[i]);
+	}
+	gtk_canvas_item_set (fade_out, "points", points, NULL);
+
+	delete [] vec;
+
+	gtk_canvas_points_unref (points);
+
+	/* XXX this is ugly, but it will have to wait till Crossfades are reimplented
+	   as regions. This puts crossfade views on top of a track, above all regions.
+	*/
+
+	gtk_canvas_item_raise_to_top (group);
+}
+
+void
+CrossfadeView::active_changed ()
+{
+	if (crossfade.active()) {
+		gtk_canvas_item_set (frame, "fill_color_rgba", color_map[cActiveCrossfade], NULL);
+	} else {
+		gtk_canvas_item_set (frame, "fill_color_rgba", color_map[cInactiveCrossfade], NULL);
+	}
+
+	redraw_curves ();
+}
+
+void
+CrossfadeView::set_valid (bool yn)
+{
+	_valid = yn;
+}
+
+AudioRegionView&
+CrossfadeView::upper_regionview () const
+{
+	if (left_view.region.layer() > right_view.region.layer()) {
+		return left_view;
+	} else {
+		return right_view;
+	}
+}
+
+void
+CrossfadeView::show ()
+{
+	gtk_canvas_item_show (group);
+	_visible = true;
+}
+
+void
+CrossfadeView::hide ()
+{
+	gtk_canvas_item_hide (group);
+	_visible = false;
+}
+
+void
+CrossfadeView::fake_hide ()
+{
+	gtk_canvas_item_hide (group);
+}