Separate verbose cursor out into its own class and clean up the API. Fixes #4010.

git-svn-id: svn://localhost/ardour2/branches/3.0@9455 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 258 insertions, 0 deletions

diff --git a/gtk2_ardour/verbose_cursor.cc b/gtk2_ardour/verbose_cursor.cc
new file mode 100644
index 0000000000..9380b36c1a
--- /dev/null
+++ b/gtk2_ardour/verbose_cursor.cc
@@ -0,0 +1,258 @@
+/*
+    Copyright (C) 2000-2011 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 <string>
+#include <gtkmm/enums.h>
+#include "ardour/profile.h"
+#include "editor.h"
+#include "ardour_ui.h"
+#include "verbose_cursor.h"
+#include "utils.h"
+#include "editor_drag.h"
+
+#include "i18n.h"
+
+using namespace std;
+using namespace ARDOUR;
+
+VerboseCursor::VerboseCursor (Editor* editor)
+	: _editor (editor)
+	, _visible (false)
+{
+	Pango::FontDescription* font = get_font_for_style (N_("VerboseCanvasCursor"));
+
+	_canvas_item = new ArdourCanvas::NoEventText (*_editor->track_canvas->root());
+	_canvas_item->property_font_desc() = *font;
+	_canvas_item->property_anchor() = Gtk::ANCHOR_NW;
+
+	delete font;
+}
+
+ArdourCanvas::Item *
+VerboseCursor::canvas_item () const
+{
+	return _canvas_item;
+}
+
+void
+VerboseCursor::set (string const & text, double x, double y)
+{
+	set_text (text);
+	set_position (x, y);
+}
+
+void
+VerboseCursor::set_text (string const & text)
+{
+	_canvas_item->property_text() = text.c_str();
+}
+
+void
+VerboseCursor::show ()
+{
+	_canvas_item->raise_to_top ();
+	_canvas_item->show ();
+	_visible = true;
+}
+
+void
+VerboseCursor::hide ()
+{
+	_canvas_item->hide ();
+	_visible = false;
+}
+
+double
+VerboseCursor::clamp_x (double x)
+{
+	if (x < 0) {
+		x = 0;
+	} else {
+		x = min (_editor->_canvas_width - 200.0, x);
+	}
+	return x;
+}
+
+double
+VerboseCursor::clamp_y (double y)
+{
+	if (y < _editor->canvas_timebars_vsize) {
+		y = _editor->canvas_timebars_vsize;
+	} else {
+		y = min (_editor->_canvas_height - 50, y);
+	}
+	return y;
+}
+
+void
+VerboseCursor::set_time (framepos_t frame, double x, double y)
+{
+	char buf[128];
+	Timecode::Time timecode;
+	Timecode::BBT_Time bbt;
+	int hours, mins;
+	framepos_t frame_rate;
+	float secs;
+
+	if (_editor->_session == 0) {
+		return;
+	}
+
+	AudioClock::Mode m;
+
+	if (Profile->get_sae() || Profile->get_small_screen()) {
+		m = ARDOUR_UI::instance()->primary_clock.mode();
+	} else {
+		m = ARDOUR_UI::instance()->secondary_clock.mode();
+	}
+
+	switch (m) {
+	case AudioClock::BBT:
+		_editor->_session->bbt_time (frame, bbt);
+		snprintf (buf, sizeof (buf), "%02" PRIu32 "|%02" PRIu32 "|%02" PRIu32, bbt.bars, bbt.beats, bbt.ticks);
+		break;
+
+	case AudioClock::Timecode:
+		_editor->_session->timecode_time (frame, timecode);
+		snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
+		break;
+
+	case AudioClock::MinSec:
+		/* XXX this is copied from show_verbose_duration_cursor() */
+		frame_rate = _editor->_session->frame_rate();
+		hours = frame / (frame_rate * 3600);
+		frame = frame % (frame_rate * 3600);
+		mins = frame / (frame_rate * 60);
+		frame = frame % (frame_rate * 60);
+		secs = (float) frame / (float) frame_rate;
+		snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%07.4f", hours, mins, secs);
+		break;
+
+	default:
+		snprintf (buf, sizeof(buf), "%" PRIi64, frame);
+		break;
+	}
+
+	set (buf, x, y);
+}
+
+void
+VerboseCursor::set_duration (framepos_t start, framepos_t end, double x, double y)
+{
+	char buf[128];
+	Timecode::Time timecode;
+	Timecode::BBT_Time sbbt;
+	Timecode::BBT_Time ebbt;
+	int hours, mins;
+	framepos_t distance, frame_rate;
+	float secs;
+	Meter meter_at_start (_editor->_session->tempo_map().meter_at(start));
+
+	if (_editor->_session == 0) {
+		return;
+	}
+
+	AudioClock::Mode m;
+
+	if (Profile->get_sae() || Profile->get_small_screen()) {
+		m = ARDOUR_UI::instance()->primary_clock.mode ();
+	} else {
+		m = ARDOUR_UI::instance()->secondary_clock.mode ();
+	}
+
+	switch (m) {
+	case AudioClock::BBT:
+	{
+		_editor->_session->bbt_time (start, sbbt);
+		_editor->_session->bbt_time (end, ebbt);
+
+		/* subtract */
+		/* XXX this computation won't work well if the
+		user makes a selection that spans any meter changes.
+		*/
+
+		/* use signed integers for the working values so that
+		   we can underflow.
+		*/
+
+		int ticks = ebbt.ticks;
+		int beats = ebbt.beats;
+		int bars = ebbt.bars;
+
+		ticks -= sbbt.ticks;
+		if (ticks < 0) {
+			ticks += int (Timecode::BBT_Time::ticks_per_beat);
+			--beats;
+		}
+
+		beats -= sbbt.beats;
+		if (beats < 0) {
+			beats += int (meter_at_start.beats_per_bar());
+			--bars;
+		}
+
+		bars -= sbbt.bars;
+
+		snprintf (buf, sizeof (buf), "%02" PRIu32 "|%02" PRIu32 "|%02" PRIu32, bars, beats, ticks);
+		break;
+	}
+
+	case AudioClock::Timecode:
+		_editor->_session->timecode_duration (end - start, timecode);
+		snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%02" PRId32 ":%02" PRId32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
+		break;
+
+	case AudioClock::MinSec:
+		/* XXX this stuff should be elsewhere.. */
+		distance = end - start;
+		frame_rate = _editor->_session->frame_rate();
+		hours = distance / (frame_rate * 3600);
+		distance = distance % (frame_rate * 3600);
+		mins = distance / (frame_rate * 60);
+		distance = distance % (frame_rate * 60);
+		secs = (float) distance / (float) frame_rate;
+		snprintf (buf, sizeof (buf), "%02" PRId32 ":%02" PRId32 ":%07.4f", hours, mins, secs);
+		break;
+
+	default:
+		snprintf (buf, sizeof(buf), "%" PRIi64, end - start);
+		break;
+	}
+
+	set (buf, x, y);
+}
+
+void
+VerboseCursor::set_color (uint32_t color)
+{
+	_canvas_item->property_fill_color_rgba() = color;
+}
+
+void
+VerboseCursor::set_position (double x, double y)
+{
+	_canvas_item->property_x() = clamp_x (x);
+	_canvas_item->property_y() = clamp_y (y);
+}
+
+bool
+VerboseCursor::visible () const
+{
+	return _visible;
+}