From ee76743c774f64759daef42d416d3fb7bbc4a473 Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Mon, 12 Mar 2007 01:33:51 +0000
Subject: Flowcanvas resizing, auto-arrange resizes if necessary. Per-track SMF
 reading (raul and machina)

git-svn-id: http://svn.drobilla.net/lad/machina@354 a436a847-0d15-0410-975c-d299462d15a1
---
 src/engine/SMFDriver.cpp         |  6 +++++-
 src/engine/machina/SMFDriver.hpp |  2 +-
 src/gui/MachinaGUI.cpp           | 28 +++++++++++++++++++++++-----
 3 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/src/engine/SMFDriver.cpp b/src/engine/SMFDriver.cpp
index 181da52..3481222 100644
--- a/src/engine/SMFDriver.cpp
+++ b/src/engine/SMFDriver.cpp
@@ -36,7 +36,7 @@ namespace Machina {
  * @return the resulting machine.
  */
 SharedPtr<Machine>
-SMFDriver::learn(const Glib::ustring& uri)
+SMFDriver::learn(const Glib::ustring& uri, unsigned track)
 {
 	const string filename = Glib::filename_from_uri(uri);
 
@@ -51,6 +51,10 @@ SMFDriver::learn(const Glib::ustring& uri)
 
 	Raul::SMFReader reader;
 	reader.open(filename);
+
+	if ( ! reader.seek_to_track(track) )
+		return SharedPtr<Machine>();
+
 	Raul::BeatTime t = 0;
 	unsigned char  buf[4];
 	uint32_t       ev_size;
diff --git a/src/engine/machina/SMFDriver.hpp b/src/engine/machina/SMFDriver.hpp
index e702534..f5d1229 100644
--- a/src/engine/machina/SMFDriver.hpp
+++ b/src/engine/machina/SMFDriver.hpp
@@ -34,7 +34,7 @@ class Machine;
 class SMFDriver : public Raul::SMFWriter,
                   public boost::enable_shared_from_this<SMFDriver> {
 public:
-	SharedPtr<Machine> learn(const Glib::ustring& uri);
+	SharedPtr<Machine> learn(const Glib::ustring& uri, unsigned track=1);
 
 	void run(SharedPtr<Machine> machine, Raul::BeatTime max_time);
 };
diff --git a/src/gui/MachinaGUI.cpp b/src/gui/MachinaGUI.cpp
index 1266147..8f8e607 100644
--- a/src/gui/MachinaGUI.cpp
+++ b/src/gui/MachinaGUI.cpp
@@ -445,15 +445,33 @@ MachinaGUI::menu_import_midi()
 	dialog.add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
 	dialog.add_button(Gtk::Stock::OPEN, Gtk::RESPONSE_OK);
 
+	Gtk::HBox* extra_widget = Gtk::manage(new Gtk::HBox());
+	Gtk::SpinButton* track_sb = Gtk::manage(new Gtk::SpinButton());
+	track_sb->set_increments(1, 10);
+	track_sb->set_range(1, 256);
+	extra_widget->pack_start(*Gtk::manage(new Gtk::Label("")), true, true);
+	extra_widget->pack_start(*Gtk::manage(new Gtk::Label("Track: ")), false, false);
+	extra_widget->pack_start(*track_sb, false, false); 
+	dialog.set_extra_widget(*extra_widget);
+	extra_widget->show_all();
+
 	const int result = dialog.run();
 
 	if (result == Gtk::RESPONSE_OK) {
 		SharedPtr<Machina::SMFDriver> file_driver(new Machina::SMFDriver());
-		SharedPtr<Machina::Machine> machine = file_driver->learn(dialog.get_uri());
-		machine->activate();
-		machine->reset();
-		_engine->driver()->set_machine(machine);
-		_canvas->build(machine);
+		SharedPtr<Machina::Machine> machine = file_driver->learn(dialog.get_uri(),
+				track_sb->get_value_as_int());
+		
+		if (machine) {
+			machine->activate();
+			machine->reset();
+			_engine->driver()->set_machine(machine);
+			_canvas->build(machine);
+		} else {
+			Gtk::MessageDialog msg_dialog(*_main_window, "Error loading MIDI file",
+					false, Gtk::MESSAGE_ERROR, Gtk::BUTTONS_OK, true);
+			msg_dialog.run();
+		} 
 	}
 }
 
-- 
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