Add a widget giving an overview of the editor, as (what I think is being) suggested in #2714. Many caveats: most notably that it looks quite ugly and you can't (yet) turn it off.

git-svn-id: svn://localhost/ardour2/branches/3.0@5162 d708f5d6-7413-0410-9779-e7cbd77b26cf

10 files changed, 295 insertions, 29 deletions

diff --git a/gtk2_ardour/audio_region_view.cc b/gtk2_ardour/audio_region_view.cc
index b36a237da5..ca3c8b3ba1 100644
--- a/gtk2_ardour/audio_region_view.cc
+++ b/gtk2_ardour/audio_region_view.cc
@@ -865,8 +865,6 @@ AudioRegionView::create_waves ()
 		if (wait_for_data) {
 			if (audio_region()->audio_source(n)->peaks_ready (bind (mem_fun(*this, &AudioRegionView::peaks_ready_handler), n), data_ready_connection)) {
 				// cerr << "\tData is ready\n";
-				cerr << "\tData is ready\n";
-				// cerr << "\tData is ready\n";
 				create_one_wave (n, true);
 			} else {
 				// cerr << "\tdata is not ready\n";
diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index e96b7838a6..a49ff6f5a0 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -211,7 +211,7 @@ Editor::Editor ()
 	  range_mark_label (_("Range Markers")),
 	  transport_mark_label (_("Loop/Punch Ranges")),
 	  cd_mark_label (_("CD Markers")),
-	  edit_packer (3, 4, true),
+	  edit_packer (4, 4, true),
 
 	  /* the values here don't matter: layout widgets
 	     reset them as needed.
@@ -437,6 +437,7 @@ Editor::Editor ()
 	transport_mark_label.set_no_show_all();
 
 	initialize_rulers ();
+	_summary = new EditorSummary (this);
 	initialize_canvas ();
 
 	selection->TimeChanged.connect (mem_fun(*this, &Editor::time_selection_changed));
@@ -502,42 +503,26 @@ Editor::Editor ()
 
 	time_canvas_event_box.add (time_canvas_vbox);
 	time_canvas_event_box.set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
-	
+
 	edit_packer.set_col_spacings (0);
 	edit_packer.set_row_spacings (0);
 	edit_packer.set_homogeneous (false);
 	edit_packer.set_border_width (0);
 	edit_packer.set_name ("EditorWindow");
 
-#ifndef THE_OLD_WAY
-
 	edit_packer.attach (ruler_label_event_box,   0, 1, 0, 1,    FILL,        SHRINK, 0, 0);
 
 	edit_packer.attach (time_button_event_box,   0, 1, 1, 2,    FILL,        SHRINK, 0, 0);
+	edit_packer.attach (*_summary       ,        1, 2, 2, 3,    FILL|EXPAND, SHRINK, 0, 0);
 	edit_packer.attach (time_canvas_event_box,   1, 2, 0, 1,    FILL|EXPAND, FILL, 0, 0);
 
-	edit_packer.attach (controls_layout,         0, 1, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
-	edit_packer.attach (track_canvas_event_box,  1, 2, 1, 3,    FILL|EXPAND, FILL|EXPAND, 0, 0);
-
-	edit_packer.attach (zoom_box,                0, 1, 3, 4,    FILL,         FILL, 0, 0);
-	edit_packer.attach (edit_hscrollbar,         1, 2, 3, 4,    FILL|EXPAND,  FILL, 0, 0);
+	edit_packer.attach (controls_layout,         0, 1, 3, 4,    FILL,        FILL|EXPAND, 0, 0);
+	edit_packer.attach (track_canvas_event_box,  1, 2, 1, 4,    FILL|EXPAND, FILL|EXPAND, 0, 0);
 
-	edit_packer.attach (edit_vscrollbar,         3, 4, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
+	edit_packer.attach (zoom_box,                0, 1, 4, 5,    FILL,         FILL, 0, 0);
+	edit_packer.attach (edit_hscrollbar,         1, 2, 4, 5,    FILL|EXPAND,  FILL, 0, 0);
 
-#else
-	
-	edit_packer.attach (edit_vscrollbar,         0, 1, 0, 4,    FILL,        FILL|EXPAND, 0, 0);
-
-	edit_packer.attach (ruler_label_event_box,   1, 2, 0, 1,    FILL,        SHRINK, 0, 0);
-	edit_packer.attach (time_button_event_box,   1, 2, 1, 2,    FILL,        SHRINK, 0, 0);
-	edit_packer.attach (time_canvas_event_box,   2, 3, 0, 1,    FILL|EXPAND, FILL, 0, 0);
-
-	edit_packer.attach (controls_layout,         1, 2, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
-	edit_packer.attach (track_canvas_event_box,  2, 3, 1, 3,    FILL|EXPAND, FILL|EXPAND, 0, 0);
-
-	edit_packer.attach (zoom_box,                1, 2, 3, 4,    FILL,         FILL, 0, 0);
-	edit_packer.attach (edit_hscrollbar,         2, 3, 3, 4,    FILL|EXPAND,  FILL, 0, 0);
-#endif
+	edit_packer.attach (edit_vscrollbar,         3, 4, 3, 4,    FILL,        FILL|EXPAND, 0, 0);
 
 	bottom_hbox.set_border_width (2);
 	bottom_hbox.set_spacing (3);
@@ -1403,6 +1388,8 @@ Editor::connect_to_session (Session *t)
 	/* register for undo history */
 	session->register_with_memento_command_factory(_id, this);
 
+	_summary->set_session (session);
+	
 	start_updating ();
 }
 
@@ -4710,6 +4697,8 @@ Editor::post_zoom ()
 		playhead_cursor->set_position (playhead_cursor->current_frame);
 	}
 
+	_summary->set_bounds_dirty ();
+
 	instant_save ();
 }
 
@@ -5325,3 +5314,9 @@ Editor::located ()
 
 	_pending_locate_request = false;
 }
+
+void
+Editor::region_view_added (RegionView *)
+{
+	_summary->set_dirty ();
+}
diff --git a/gtk2_ardour/editor.h b/gtk2_ardour/editor.h
index 5a45e398d0..4d212d581c 100644
--- a/gtk2_ardour/editor.h
+++ b/gtk2_ardour/editor.h
@@ -63,6 +63,7 @@
 #include "editor_items.h"
 #include "region_selection.h"
 #include "canvas.h"
+#include "editor_summary.h"
 
 namespace Gtkmm2ext {
 	class TearOff;
@@ -2215,6 +2216,9 @@ public:
 	void located ();
 	bool _pending_locate_request;
 
+	EditorSummary* _summary;
+	void region_view_added (RegionView *);
+
 	friend class Drag;
 	friend class RegionDrag;
 	friend class RegionMoveDrag;
@@ -2238,6 +2242,8 @@ public:
 	friend class RegionCreateDrag;
 	friend class RegionMotionDrag;
 	friend class RegionInsertDrag;
+
+	friend class EditorSummary;
 };
 
 #endif /* __ardour_editor_h__ */
diff --git a/gtk2_ardour/editor_canvas.cc b/gtk2_ardour/editor_canvas.cc
index 146f756225..573b3af16a 100644
--- a/gtk2_ardour/editor_canvas.cc
+++ b/gtk2_ardour/editor_canvas.cc
@@ -362,6 +362,7 @@ Editor::track_canvas_size_allocated ()
 	reset_hscrollbar_stepping ();
 	update_fixed_rulers();
 	redisplay_tempo (false);
+	_summary->set_bounds_dirty ();
 
 	Resized (); /* EMIT_SIGNAL */
 
@@ -773,8 +774,6 @@ Editor::tie_vertical_scrolling ()
 void
 Editor::scroll_canvas_horizontally ()
 {
-	nframes64_t time_origin = (nframes64_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
-
 	/* horizontal scrolling only */
 	double x1, y1, x2, y2, x_delta;
 	_master_group->get_bounds (x1, y1, x2, y2);
@@ -791,6 +790,8 @@ Editor::scroll_canvas_horizontally ()
 	update_fixed_rulers ();
 	redisplay_tempo (true);
 
+	_summary->set_bounds_dirty ();
+
 #ifndef GTKOSX
 	if (!autoscroll_active) {
 		/* force rulers and canvas to move in lock step */
diff --git a/gtk2_ardour/editor_canvas_events.cc b/gtk2_ardour/editor_canvas_events.cc
index 99868367f0..b86ba76f83 100644
--- a/gtk2_ardour/editor_canvas_events.cc
+++ b/gtk2_ardour/editor_canvas_events.cc
@@ -170,7 +170,7 @@ Editor::track_canvas_scroll (GdkEventScroll* ev)
 		/* what? */
 		break;
 	}
-	
+
 	return false;
 }
 
diff --git a/gtk2_ardour/editor_route_list.cc b/gtk2_ardour/editor_route_list.cc
index 964ee38712..340f678228 100644
--- a/gtk2_ardour/editor_route_list.cc
+++ b/gtk2_ardour/editor_route_list.cc
@@ -130,6 +130,7 @@ Editor::handle_new_route (RouteList& routes)
 		ignore_route_list_reorder = false;
 
 		route->gui_changed.connect (mem_fun(*this, &Editor::handle_gui_changes));
+		tv->view()->RegionViewAdded.connect (mem_fun (*this, &Editor::region_view_added));
 		
 		tv->GoingAway.connect (bind (mem_fun(*this, &Editor::remove_route), tv));
 	}
@@ -144,6 +145,8 @@ Editor::handle_new_route (RouteList& routes)
 
 	editor_list_button.set_sensitive(true);
 	route_redisplay_does_not_sync_order_keys = false;
+
+	_summary->set_dirty ();
 }
 
 void
diff --git a/gtk2_ardour/editor_summary.cc b/gtk2_ardour/editor_summary.cc
new file mode 100644
index 0000000000..3b9de030de
--- /dev/null
+++ b/gtk2_ardour/editor_summary.cc
@@ -0,0 +1,220 @@
+#include "ardour/session.h"
+#include "time_axis_view.h"
+#include "streamview.h"
+#include "editor_summary.h"
+#include "gui_thread.h"
+#include "editor.h"
+#include "region_view.h"
+
+using namespace std;
+using namespace sigc;
+using namespace ARDOUR;
+
+EditorSummary::EditorSummary (Editor* e)
+	: _editor (e),
+	  _session (0),
+	  _pixmap (0),
+	  _regions_dirty (true),
+	  _width (512),
+	  _height (64),
+	  _pixels_per_frame (1)
+{
+	
+}
+
+void
+EditorSummary::set_session (Session* s)
+{
+	_session = s;
+
+	Region::RegionPropertyChanged.connect (sigc::hide (mem_fun (*this, &EditorSummary::set_dirty)));
+
+	_session->RegionRemoved.connect (sigc::hide (mem_fun (*this, &EditorSummary::set_dirty)));
+	_session->EndTimeChanged.connect (mem_fun (*this, &EditorSummary::set_dirty));
+	_session->StartTimeChanged.connect (mem_fun (*this, &EditorSummary::set_dirty));
+
+	set_dirty ();
+}
+
+EditorSummary::~EditorSummary ()
+{
+	if (_pixmap) {
+		gdk_pixmap_unref (_pixmap);
+	}
+}
+
+bool
+EditorSummary::on_expose_event (GdkEventExpose* event)
+{
+	Gdk::Rectangle const exposure (
+		event->area.x, event->area.y, event->area.width, event->area.height
+		);
+
+	Gdk::Rectangle r = exposure;
+	Gdk::Rectangle content (0, 0, _width, _height);
+	bool intersects;
+	r.intersect (content, intersects);
+	
+	if (intersects) {
+
+		GdkPixmap* p = get_pixmap (get_window()->gobj ());
+
+		gdk_draw_drawable (
+			get_window()->gobj(),
+			get_style()->get_fg_gc (Gtk::STATE_NORMAL)->gobj(),
+			p,
+ 			r.get_x(),
+ 			r.get_y(),
+ 			r.get_x(),
+ 			r.get_y(),
+ 			r.get_width(),
+ 			r.get_height()
+			);
+	}
+
+	cairo_t* cr = gdk_cairo_create (get_window()->gobj());
+
+	cairo_set_source_rgb (cr, 0, 1, 0);
+	cairo_set_line_width (cr, 2);
+
+	double const s = (_editor->leftmost_position () - _session->current_start_frame ()) * _pixels_per_frame; 
+	cairo_move_to (cr, s, 0);
+	cairo_line_to (cr, s, _height);
+	cairo_stroke (cr);
+
+	double const e = s + _editor->current_page_frames() * _pixels_per_frame;
+	cairo_move_to (cr, e, 0);
+	cairo_line_to (cr, e, _height);
+	cairo_stroke (cr);
+	
+	cairo_destroy (cr);
+	
+	return true;
+}
+
+GdkPixmap *
+EditorSummary::get_pixmap (GdkDrawable* drawable)
+{
+	if (_regions_dirty) {
+
+		if (_pixmap) {
+			gdk_pixmap_unref (_pixmap);
+		}
+		_pixmap = gdk_pixmap_new (drawable, _width, _height, -1);
+
+		cairo_t* cr = gdk_cairo_create (_pixmap);
+		render (cr);
+		cairo_destroy (cr);
+
+		_regions_dirty = false;
+	}
+
+	return _pixmap;
+}
+
+void
+EditorSummary::render (cairo_t* cr)
+{
+	if (_session == 0) {
+		return;
+	}
+
+	cairo_set_source_rgb (cr, 0, 0, 0);
+	cairo_rectangle (cr, 0, 0, _width, _height);
+	cairo_fill (cr);
+
+	int N = 0;
+	
+	for (PublicEditor::TrackViewList::const_iterator i = _editor->track_views.begin(); i != _editor->track_views.end(); ++i) {
+		if ((*i)->view()) {
+			++N;
+		}
+	}
+
+	nframes_t const start = _session->current_start_frame ();
+	_pixels_per_frame = static_cast<double> (_width) / (_session->current_end_frame() - start);
+	double const track_height = static_cast<double> (_height) / N;
+
+	cairo_set_line_width (cr, track_height);
+
+	int n = 0;
+	for (PublicEditor::TrackViewList::const_iterator i = _editor->track_views.begin(); i != _editor->track_views.end(); ++i) {
+		StreamView* s = (*i)->view ();
+		if (s) {
+
+			double const v = ((n % 2) == 0) ? 1 : 0.5;
+			cairo_set_source_rgb (cr, v, v, v);
+
+			s->foreach_regionview (bind (
+						       mem_fun (*this, &EditorSummary::render_region),
+						       cr,
+						       start,
+						       track_height * (n + 0.5)
+						       ));
+			++n;
+		}
+	}
+
+}
+
+void
+EditorSummary::render_region (RegionView* r, cairo_t* cr, nframes_t start, double y) const
+{
+	cairo_move_to (cr, (r->region()->position() - start) * _pixels_per_frame, y);
+	cairo_line_to (cr, (r->region()->position() - start + r->region()->length()) * _pixels_per_frame, y);
+	cairo_stroke (cr);
+}
+
+void
+EditorSummary::set_dirty ()
+{
+	ENSURE_GUI_THREAD (mem_fun (*this, &EditorSummary::set_dirty));
+
+	_regions_dirty = true;
+	queue_draw ();
+}
+
+void
+EditorSummary::set_bounds_dirty ()
+{
+	ENSURE_GUI_THREAD (mem_fun (*this, &EditorSummary::set_bounds_dirty));
+	queue_draw ();
+}
+
+void
+EditorSummary::on_size_request (Gtk::Requisition *req)
+{
+	req->width = 64;
+	req->height = 64;
+}
+
+void
+EditorSummary::on_size_allocate (Gtk::Allocation& alloc)
+{
+	Gtk::EventBox::on_size_allocate (alloc);
+
+	_width = alloc.get_width ();
+	_height = alloc.get_height ();
+
+	set_dirty ();
+}
+
+bool
+EditorSummary::on_button_press_event (GdkEventButton* ev)
+{
+	if (ev->button == 1) {
+
+		nframes_t f = (ev->x / _pixels_per_frame) + _session->current_start_frame();
+
+		nframes_t const h = _editor->current_page_frames () / 2;
+		if (f > h) {
+			f -= h;
+		} else {
+			f = 0;
+		}
+		
+		_editor->reset_x_origin (f);
+	}
+
+	return true;
+}
diff --git a/gtk2_ardour/editor_summary.h b/gtk2_ardour/editor_summary.h
new file mode 100644
index 0000000000..b9632dc96f
--- /dev/null
+++ b/gtk2_ardour/editor_summary.h
@@ -0,0 +1,41 @@
+#ifndef __gtk_ardour_editor_summary_h__
+#define __gtk_ardour_editor_summary_h__
+
+#include <gtkmm/eventbox.h>
+
+namespace ARDOUR {
+	class Session;
+}
+
+class Editor;
+
+class EditorSummary : public Gtk::EventBox
+{
+public:
+	EditorSummary (Editor *);
+	~EditorSummary ();
+
+	void set_session (ARDOUR::Session *);
+	void set_dirty ();
+	void set_bounds_dirty ();
+
+private:
+	bool on_expose_event (GdkEventExpose *);
+	void on_size_request (Gtk::Requisition *);
+	void on_size_allocate (Gtk::Allocation &);
+	bool on_button_press_event (GdkEventButton *);
+
+	void render (cairo_t *);
+	GdkPixmap* get_pixmap (GdkDrawable *);
+	void render_region (RegionView*, cairo_t*, nframes_t, double) const;
+
+	Editor* _editor;
+	ARDOUR::Session* _session;
+	GdkPixmap* _pixmap;
+	bool _regions_dirty;
+	int _width;
+	int _height;
+	double _pixels_per_frame;
+};
+
+#endif
diff --git a/gtk2_ardour/port_matrix_body.cc b/gtk2_ardour/port_matrix_body.cc
index 75bf42c9b7..59444ba7ff 100644
--- a/gtk2_ardour/port_matrix_body.cc
+++ b/gtk2_ardour/port_matrix_body.cc
@@ -508,3 +508,4 @@ PortMatrixBody::component_size_changed ()
 	_matrix->setup_scrollbars ();
 }
 
+
diff --git a/gtk2_ardour/wscript b/gtk2_ardour/wscript
index 1735f08a65..9b7ab1fd3f 100644
--- a/gtk2_ardour/wscript
+++ b/gtk2_ardour/wscript
@@ -120,6 +120,7 @@ def build(bld):
 		editor_scrub.cc
 		editor_selection.cc
 		editor_selection_list.cc
+                editor_summary.cc
 		editor_tempodisplay.cc
 		editor_timefx.cc
 		engine_dialog.cc