/*
    Copyright (C) 2000-2004 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 <sigc++/bind.h>

#include <gtkmm/accelmap.h>

#include <pbd/lockmonitor.h>
#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/stop_signal.h>

#include <ardour/audioengine.h>
#include <ardour/session.h>
#include <ardour/session_route.h>
#include <ardour/diskstream.h>
#include <ardour/plugin_manager.h>

#include "mixer_ui.h"
#include "mixer_strip.h"
#include "plugin_selector.h"
#include "ardour_ui.h"
#include "prompter.h"
#include "utils.h"
#include "actions.h"
#include "gui_thread.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace Gtk;
using namespace Glib;
using namespace Gtkmm2ext;
using namespace sigc;

Mixer_UI::Mixer_UI (AudioEngine& eng)
	: Window (Gtk::WINDOW_TOPLEVEL),
	  engine (eng)
{
	_strip_width = Wide;
	track_menu = 0;

	XMLNode* node = ARDOUR_UI::instance()->mixer_settings();
	set_state (*node);

 	scroller_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
 	scroller_base.set_name ("MixerWindow");
 	scroller_base.signal_button_release_event().connect (mem_fun(*this, &Mixer_UI::strip_scroller_button_release));
	// add as last item of strip packer
	strip_packer.pack_end (scroller_base, true, true);

	scroller.add (strip_packer);
	scroller.set_policy (Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

	track_display_model = ListStore::create (track_display_columns);
	track_display.set_model (track_display_model);
	track_display.append_column (_("Strips"), track_display_columns.text);
	track_display.set_name (X_("MixerTrackDisplayList"));
	track_display.get_selection()->set_mode (Gtk::SELECTION_MULTIPLE);
	track_display.set_reorderable (true);
	track_display.set_size_request (75, -1);
	track_display.set_headers_visible (true);
	track_display.set_headers_clickable (true);
	track_display_scroller.add (track_display);
	track_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

	group_display_model = ListStore::create (group_display_columns);
	group_display.set_model (group_display_model);
	group_display.append_column (_("active"), group_display_columns.active);
	group_display.append_column (_("groupname"), group_display_columns.text);
	group_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
	group_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));

	/* use checkbox for the active column */

	CellRendererToggle *active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (0));
	active_cell->property_activatable() = true;
	active_cell->property_radio() = false;
	
	group_display.set_name ("MixerGroupList");
	group_display.set_reorderable (true);
	group_display.set_size_request (true);
	group_display_scroller.add (group_display);
	group_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

	snapshot_display_model = ListStore::create (snapshot_display_columns);
	snapshot_display.set_model (snapshot_display_model);
	snapshot_display.append_column (X_("mixgroups"), snapshot_display_columns.visible_name);
	snapshot_display.set_name ("MixerSnapshotDisplayList");
	snapshot_display.set_size_request (75, -1);
	snapshot_display.set_reorderable (true);
	snapshot_display_scroller.add (snapshot_display);
	snapshot_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

	group_display_vbox.pack_start (group_display_button, false, false);
	group_display_vbox.pack_start (group_display_scroller, true, true);

	track_display_frame.set_name("BaseFrame");
	track_display_frame.set_shadow_type (Gtk::SHADOW_IN);
	track_display_frame.add(track_display_scroller);

	group_display_frame.set_name ("BaseFrame");
	group_display_frame.set_shadow_type (Gtk::SHADOW_IN);
	group_display_frame.add (group_display_vbox);

	rhs_pane1.add1 (track_display_frame);
	rhs_pane1.add2 (rhs_pane2);

	rhs_pane2.add1 (group_display_frame);
	rhs_pane2.add2 (snapshot_display_scroller);

	list_vpacker.pack_start (rhs_pane1, true, true);

	global_hpacker.pack_start (scroller, true, true);
	global_hpacker.pack_start (out_packer, false, false);

	list_hpane.add1(list_vpacker);
	list_hpane.add2(global_hpacker);

	rhs_pane1.signal_size_allocate().connect (bind (mem_fun(*this, &Mixer_UI::pane_allocation_handler), 
							static_cast<Gtk::Paned*> (&rhs_pane1)));
	rhs_pane2.signal_size_allocate().connect (bind (mem_fun(*this, &Mixer_UI::pane_allocation_handler), 
							static_cast<Gtk::Paned*> (&rhs_pane2)));
	list_hpane.signal_size_allocate().connect (bind (mem_fun(*this, &Mixer_UI::pane_allocation_handler), 
							 static_cast<Gtk::Paned*> (&list_hpane)));
	

	rhs_pane1.set_data ("collapse-direction", (gpointer) 0);
	rhs_pane2.set_data ("collapse-direction", (gpointer) 0);
	list_hpane.set_data ("collapse-direction", (gpointer) 1);

	rhs_pane1.signal_button_release_event().connect (bind (ptr_fun (pane_handler), static_cast<Paned*>(&rhs_pane1)));
	rhs_pane2.signal_button_release_event().connect (bind (ptr_fun (pane_handler), static_cast<Paned*>(&rhs_pane2)));
	list_hpane.signal_button_release_event().connect (bind (ptr_fun (pane_handler), static_cast<Paned*>(&list_hpane)));
	
	global_vpacker.pack_start (list_hpane, true, true);

	add (global_vpacker);
	set_name ("MixerWindow");
	set_title (_("ardour: mixer"));
	set_wmclass (_("ardour_mixer"), "Ardour");

	add_accel_group (ActionManager::ui_manager->get_accel_group());

	signal_delete_event().connect (bind (ptr_fun (just_hide_it), static_cast<Gtk::Window *>(this)));
	add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);

	track_display.get_selection()->signal_changed().connect (mem_fun(*this, &Mixer_UI::track_display_selection_changed));
	reorder_connection = track_display_model->signal_rows_reordered().connect (mem_fun (*this, &Mixer_UI::track_display_reordered_proxy));

	group_display.signal_button_press_event().connect (mem_fun (*this, &Mixer_UI::group_display_button_press));
	group_display.get_selection()->signal_changed().connect (mem_fun (*this, &Mixer_UI::group_display_selection_changed));

	snapshot_display.get_selection()->signal_changed().connect (mem_fun(*this, &Mixer_UI::snapshot_display_selection_changed));
	snapshot_display.signal_button_press_event().connect (mem_fun (*this, &Mixer_UI::snapshot_display_button_press));

	_plugin_selector = new PluginSelector (PluginManager::the_manager());

	signal_configure_event().connect (mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::configure_handler));

	_selection.RoutesChanged.connect (mem_fun(*this, &Mixer_UI::follow_strip_selection));
}

Mixer_UI::~Mixer_UI ()
{
}

void
Mixer_UI::ensure_float (Window& win)
{
	win.set_transient_for (*this);
}

void
Mixer_UI::show_window ()
{
	show_all ();

	/* now reset each strips width so the right widgets are shown */
	MixerStrip* ms;

	TreeModel::Children rows = track_display_model->children();
	TreeModel::Children::iterator ri;

	for (ri = rows.begin(); ri != rows.end(); ++ri) {
		ms = (*ri)[track_display_columns.strip];
		ms->set_width (ms->get_width());
	}
}

void
Mixer_UI::add_strip (Route* route)
{
	ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::add_strip), route));
	
	MixerStrip* strip;

	if (route->hidden()) {
		return;
	}

	strip = new MixerStrip (*this, *session, *route);
	strips.push_back (strip);

	strip->set_width (_strip_width);
	show_strip (strip);

	reorder_connection.block();
	
	TreeModel::Row row = *(track_display_model->append());
	row[track_display_columns.text] = route->name();
	row[track_display_columns.route] = route;
	row[track_display_columns.strip] = strip;

	reorder_connection.unblock();
	
	// if (strip->marked_for_display() || strip->packed()) {
	// track_display.get_selection()->select (row);
        // }
	
	route->name_changed.connect (bind (mem_fun(*this, &Mixer_UI::strip_name_changed), strip));
	strip->GoingAway.connect (bind (mem_fun(*this, &Mixer_UI::remove_strip), strip));

	strip->signal_button_release_event().connect (bind (mem_fun(*this, &Mixer_UI::strip_button_release_event), strip));

//	if (width() < gdk_screen_width()) {
//		set_size_request (width() + (_strip_width == Wide ? 75 : 50), height());
//	}
}

void
Mixer_UI::remove_strip (MixerStrip* strip)
{
	ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::remove_strip), strip));
	
	TreeModel::Children rows = track_display_model->children();
	TreeModel::Children::iterator ri;
	list<MixerStrip *>::iterator i;

	if ((i = find (strips.begin(), strips.end(), strip)) != strips.end()) {
		strips.erase (i);
	}

	for (ri = rows.begin(); ri != rows.end(); ++ri) {
		if ((*ri)[track_display_columns.strip] == strip) {
			track_display_model->erase (ri);
			break;
		}
	}
}

void
Mixer_UI::follow_strip_selection ()
{
	for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
		(*i)->set_selected (_selection.selected (&(*i)->route()));
	}
}

gint
Mixer_UI::strip_button_release_event (GdkEventButton *ev, MixerStrip *strip)
{
	if (ev->button == 1) {

		/* this allows the user to click on the strip to terminate comment
		   editing. XXX it needs improving so that we don't select the strip
		   at the same time.
		*/
		
		if (_selection.selected (&strip->route())) {
			_selection.remove (&strip->route());
		} else {
			if (Keyboard::modifier_state_equals (ev->state, Keyboard::Shift)) {
				_selection.add (&strip->route());
			} else {
				_selection.set (&strip->route());
			}
		}
	}

	return TRUE;
}

void
Mixer_UI::connect_to_session (Session* sess)
{
	session = sess;

	string wintitle = _("ardour: mixer: ");
	wintitle += session->name();
	set_title (wintitle);

	// GTK2FIX: do we really need to do this?
	// track_display.set_model (RefPtr<TreeStore>(0));
	track_display_model->clear ();
	session->foreach_route (this, &Mixer_UI::add_strip);
	// track_display.set_model (track_display_model);

	session->going_away.connect (mem_fun(*this, &Mixer_UI::disconnect_from_session));
	session->RouteAdded.connect (mem_fun(*this, &Mixer_UI::add_strip));
	session->mix_group_added.connect (mem_fun(*this, &Mixer_UI::add_mix_group));

	session->foreach_mix_group(this, &Mixer_UI::add_mix_group);
	
	session->StateSaved.connect (mem_fun(*this, &Mixer_UI::session_state_saved));
	redisplay_snapshots ();
	
	_plugin_selector->set_session (session);

	start_updating ();
}

void
Mixer_UI::disconnect_from_session ()
{
	ENSURE_GUI_THREAD(mem_fun(*this, &Mixer_UI::disconnect_from_session));
	
	group_display_model->clear ();
	set_title (_("ardour: mixer"));
	stop_updating ();
	hide_all_strips (false);
}

void
Mixer_UI::hide_all_strips (bool with_select)
{
	TreeModel::Children rows = track_display_model->children();
	TreeModel::Children::iterator i;

	// GTK2FIX
	// track_display_list.freeze ();
	
	for (i = rows.begin(); i != rows.end(); ++i) {
		
		TreeModel::Row row = (*i);
		MixerStrip* ms = row[track_display_columns.strip];
		
		if (with_select) {
			track_display.get_selection()->unselect (i);
		} else {
			hide_strip (ms);
		}
	}

	// track_display_list.thaw ();
}

void
Mixer_UI::unselect_all_strips ()
{
	hide_all_strips (false);
}

void
Mixer_UI::select_all_strips ()
{
	TreeModel::Children rows = track_display_model->children();
	TreeModel::Children::iterator i;

	for (i = rows.begin(); i != rows.end(); ++i) {
		track_display.get_selection()->select (i);
	}
}

void
Mixer_UI::strip_select_op (bool audiotrack, bool select)
{
	MixerStrip* ms;
	TreeModel::Children rows = track_display_model->children();
	TreeModel::Children::iterator i;

	// GTK2FIX
	// track_display_list.freeze ();
	
	for (i = rows.begin(); i != rows.end(); ++i) {
		ms = (*i)[track_display_columns.strip];

		if (ms->is_audio_track() == audiotrack) {
			if (select) {
				track_display.get_selection()->select (i);
			} else {
				track_display.get_selection()->unselect (i);
			}
		}
	}
	
	// track_display_list.thaw ();	
}

void
Mixer_UI::select_all_audiotrack_strips ()
{
	strip_select_op (true, true);
}
void
Mixer_UI::unselect_all_audiotrack_strips ()
{
	strip_select_op (true, false);
}

void
Mixer_UI::select_all_audiobus_strips ()
{
	strip_select_op (false, true);
}

void
Mixer_UI::unselect_all_audiobus_strips ()
{
	strip_select_op (false, false);
}

void
Mixer_UI::show_strip (MixerStrip* ms)
{
	if (!ms->packed()) {
		
		if (ms->route().master() || ms->route().control()) {
			out_packer.pack_start (*ms, false, false);
		} else {
			strip_packer.pack_start (*ms, false, false);
		}
		ms->set_packed (true);
		ms->show ();
	 }
 }

 void
 Mixer_UI::hide_strip (MixerStrip* ms)
 {
	 if (ms->packed()) {
		 if (ms->route().master() || ms->route().control()) {
			 out_packer.remove (*ms);
		 } else {
			 strip_packer.remove (*ms);
		 }
		 ms->set_packed (false);
	 }
 }

 gint
 Mixer_UI::start_updating ()
 {
	 screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect (mem_fun(*this, &Mixer_UI::update_strips));
	 fast_screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun(*this, &Mixer_UI::fast_update_strips));
	 return 0;
 }

 gint
 Mixer_UI::stop_updating ()
 {
	 screen_update_connection.disconnect();
	 fast_screen_update_connection.disconnect();
	 return 0;
 }

 void
 Mixer_UI::update_strips ()
 {
	 if (is_mapped () && session) {
		 for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
			 (*i)->update ();
		 }
	 }
 }

 void
 Mixer_UI::fast_update_strips ()
 {
	 if (is_mapped () && session) {
		 for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
			 (*i)->fast_update ();
		 }
	 }
 }

 void
 Mixer_UI::snapshot_display_selection_changed ()
 {
	 TreeModel::iterator i = snapshot_display.get_selection()->get_selected();

	 Glib::ustring snap_name = (*i)[snapshot_display_columns.real_name];

	 if (session->snap_name() == snap_name) {
		 return;
	 }

	 ARDOUR_UI::instance()->load_session(session->path(), string (snap_name));
 }

 bool
 Mixer_UI::snapshot_display_button_press (GdkEventButton* ev)
 {
	 return false;
 }

 void
 Mixer_UI::track_display_selection_changed ()
 {
	 MixerStrip* strip;
	 TreeModel::Children rows = track_display_model->children();
	 TreeModel::Children::iterator i;
	 Glib::RefPtr<TreeSelection> selection = track_display.get_selection();

	 for (i = rows.begin(); i != rows.end(); ++i) {
		 if (selection->is_selected (i)) {
			 strip = (*i)[track_display_columns.strip];
			 strip->set_marked_for_display  (true);
			 show_strip (strip);
		 } else {
			 strip = (*i)[track_display_columns.strip];
			 strip->set_marked_for_display (false);
			 hide_strip (strip);
		 }
	 }

	 track_display_reordered ();
 }

 void
 Mixer_UI::select_strip_op (MixerStrip *strip, bool yn)
 {
	 TreeModel::Children rows = track_display_model->children();
	 TreeModel::Children::iterator i;
	 Glib::RefPtr<TreeSelection> selection = track_display.get_selection();

	 for (i = rows.begin(); i != rows.end(); ++i) {
		 if ((*i)[track_display_columns.strip] == strip) {
			 if (yn) {
				 selection->select (*i);
			 } else {
				 selection->unselect (*i);
			 }
			 break;
		 }
	 }
 }

 void
 Mixer_UI::unselect_strip_in_display (MixerStrip *strip)
 {
	 select_strip_op (strip, true);
 }
 void
 Mixer_UI::select_strip_in_display (MixerStrip *strip)
 {
	 select_strip_op (strip, false);
 }

 void
 Mixer_UI::track_display_reordered_proxy (const TreeModel::Path& path, const TreeModel::iterator& i, int* n)
 {
	 track_display_reordered ();
 }

 void
 Mixer_UI::track_display_reordered ()
 {
	 TreeModel::Children rows = track_display_model->children();
	 TreeModel::Children::iterator i;
	 long order;

	 for (order = 0, i = rows.begin(); i != rows.end(); ++i, ++order) {
		 MixerStrip* strip = (*i)[track_display_columns.strip];

		 if (strip->marked_for_display()) {
			 strip->route().set_order_key (N_("signal"), order);
			 if (strip->packed()) {
				 cerr << "reorder strip @ " << strip << endl;
				 strip_packer.reorder_child (*strip, -1); /* put at end */
			 }
		}
	}
}

void
Mixer_UI::track_column_click (gint col)
{
	if (track_menu == 0) {
		build_track_menu ();
	}

	track_menu->popup (0, 0);
}

void
Mixer_UI::build_track_menu ()
{
	using namespace Menu_Helpers;
	using namespace Gtk;

	track_menu = new Menu;
	track_menu->set_name ("ArdourContextMenu");
	MenuList& items = track_menu->items();
	track_menu->set_name ("ArdourContextMenu");
	
	items.push_back (MenuElem (_("Show All"), mem_fun(*this, &Mixer_UI::select_all_strips)));
	items.push_back (MenuElem (_("Hide All"), mem_fun(*this, &Mixer_UI::unselect_all_strips)));
	items.push_back (MenuElem (_("Show All AudioTrack MixerStrips"), mem_fun(*this, &Mixer_UI::select_all_audiotrack_strips)));
	items.push_back (MenuElem (_("Hide All AudioTrack MixerStrips"), mem_fun(*this, &Mixer_UI::unselect_all_audiotrack_strips)));
	items.push_back (MenuElem (_("Show All AudioBus MixerStrips"), mem_fun(*this, &Mixer_UI::select_all_audiobus_strips)));
	items.push_back (MenuElem (_("Hide All AudioBus MixerStrips"), mem_fun(*this, &Mixer_UI::unselect_all_audiobus_strips)));

}

void
Mixer_UI::strip_name_changed (void* src, MixerStrip* mx)
{
	ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::strip_name_changed), src, mx));
	
	TreeModel::Children rows = track_display_model->children();
	TreeModel::Children::iterator i;
	
	for (i = rows.begin(); i != rows.end(); ++i) {
		if ((*i)[track_display_columns.strip] == mx) {
			(*i)[track_display_columns.text] = mx->route().name();
			return;
		}
	} 

	error << _("track display list item for renamed strip not found!") << endmsg;
}

void
Mixer_UI::new_mix_group ()
{
	ArdourPrompter prompter;
	string result;

	prompter.set_prompt (_("Name for new mix group"));
	prompter.show_all ();
	
	switch (prompter.run ()) {
	case GTK_RESPONSE_ACCEPT:
		prompter.get_result (result);
		if (result.length()) {
			session->add_mix_group (result);
		}	
		break;
	}
}

// GTK2FIX
//void
//Mixer_UI::group_display_button_clicked ()
//{
//	if (session) {
//		new_mix_group ();
//	}
//}

bool
Mixer_UI::group_display_button_press (GdkEventButton* ev)
{
	RouteGroup* group;

	TreeIter iter;
	TreeModel::Path path;
	TreeViewColumn* column;
	int cellx;
	int celly;

	if (!group_display.get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
		return false;
	}
	
	switch (GPOINTER_TO_UINT (column->get_data (X_("colnum")))) {
	case 0:
		/* active column click */
		
		if ((iter = group_display_model->get_iter (path))) {
			/* path points to a valid node */
			if ((group = (*iter)[group_display_columns.group]) != 0) {
				group->set_active (!group->is_active (), this);
			}
		}
		break;

	case 1:
		if (Keyboard::is_edit_event (ev)) {
			// RouteGroup* group = (RouteGroup *) group_display.row(row).get_data ();
			// edit_mix_group (group);

		} else {
			/* allow regular select to occur */
			return false;
		}
		break;
	}
		
	return true;
}

void
Mixer_UI::group_display_selection_changed ()
{
	TreeModel::iterator i;
	TreeModel::Children rows = group_display_model->children();
	Glib::RefPtr<TreeSelection> selection = group_display.get_selection();

	for (i = rows.begin(); i != rows.end(); ++i) {
		RouteGroup* group;

		group = (*i)[group_display_columns.group];

		if (selection->is_selected (i)) {
			group->set_hidden (true, this);
		} else {
			group->set_hidden (true, this);
		}
	}

	track_display_reordered ();
}

void
Mixer_UI::group_flags_changed (void* src, RouteGroup* group)
{
	ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::group_flags_changed), src, group));
	
	if (src != this) {
		// select row
	}

	TreeModel::Children rows = group_display_model->children();
	TreeModel::Children::iterator gi;
	TreeModel::Children::iterator ti;

	for (gi = rows.begin(); gi != rows.end(); ++gi) {
		if ((*gi)[group_display_columns.group] == group) {
			break;
		}
	}

	if (gi == rows.end()) {
		return;
	}
		
	rows = track_display_model->children();

	for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
		if ((*i)->route().mix_group() == group) {
			if (group->is_hidden ()) {
				unselect_strip_in_display(*i);
				group_display.get_selection()->unselect (*gi);
			} else {
				select_strip_in_display(*i);
				group_display.get_selection()->select (*gi);
			}
		}
	}
}

void
Mixer_UI::add_mix_group (RouteGroup* group)

{
	ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::add_mix_group), group));

	TreeModel::Row row = *(group_display_model->append());
	row[group_display_columns.active] = group->is_active();
	row[group_display_columns.text] = group->name();
	row[group_display_columns.group] = group;

	group->FlagsChanged.connect (bind (mem_fun(*this, &Mixer_UI::group_flags_changed), group));
}

void
Mixer_UI::redisplay_snapshots ()
{
	if (session == 0) {
		return;
	}

	vector<string*>* states;
	if ((states = session->possible_states()) == 0) {
		return;
	}

	snapshot_display_model->clear ();

	for (vector<string*>::iterator i = states->begin(); i != states->end(); ++i) {
		string statename = *(*i);
		const TreeModel::Row & row = *snapshot_display_model->append();
		row[snapshot_display_columns.visible_name] = statename;
		row[snapshot_display_columns.real_name] = statename;
	}

	delete states;
}

void
Mixer_UI::session_state_saved (string snap_name)
{
	ENSURE_GUI_THREAD (bind (mem_fun(*this, &Mixer_UI::session_state_saved), snap_name));
	redisplay_snapshots ();
}

gint
Mixer_UI::strip_scroller_button_release (GdkEventButton* ev)
{
	using namespace Menu_Helpers;

	if (Keyboard::is_context_menu_event (ev)) {
		ARDOUR_UI::instance()->add_route();
		return TRUE;
	}

	return FALSE;
}

void
Mixer_UI::set_strip_width (Width w)
{
	_strip_width = w;

	for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
		(*i)->set_width (w);
	}
}


int
Mixer_UI::set_state (const XMLNode& node)
{
	const XMLProperty* prop;
	XMLNode* geometry;
	int x, y, width, height, xoff, yoff;
	
	if ((geometry = find_named_node (node, "geometry")) == 0) {

		width = default_width;
		height = default_height;
		x = 1;
		y = 1;
		xoff = 0;
		yoff = 21;

	} else {

		width = atoi(geometry->property("x_size")->value().c_str());
		height = atoi(geometry->property("y_size")->value().c_str());
		x = atoi(geometry->property("x_pos")->value().c_str());
		y = atoi(geometry->property("y_pos")->value().c_str());
		xoff = atoi(geometry->property("x_off")->value().c_str());
		yoff = atoi(geometry->property("y_off")->value().c_str());
	}
		
	set_default_size(width, height);
	// GTK2FIX
	// set_uposition(x, y-yoff);

	if ((prop = node.property ("narrow-strips"))) {
		if (prop->value() == "yes") {
			set_strip_width (Narrow);
		} else {
			set_strip_width (Wide);
		}
	}

	return 0;
}

XMLNode&
Mixer_UI::get_state (void)
{
	XMLNode* node = new XMLNode ("Mixer");

	if (is_realized()) {
		Glib::RefPtr<Gdk::Window> win = get_window();
		
		int x, y, xoff, yoff, width, height;
		win->get_root_origin(x, y);
		win->get_position(xoff, yoff);
		win->get_size(width, height);

		XMLNode* geometry = new XMLNode ("geometry");
		char buf[32];
		snprintf(buf, sizeof(buf), "%d", width);
		geometry->add_property(X_("x_size"), string(buf));
		snprintf(buf, sizeof(buf), "%d", height);
		geometry->add_property(X_("y_size"), string(buf));
		snprintf(buf, sizeof(buf), "%d", x);
		geometry->add_property(X_("x_pos"), string(buf));
		snprintf(buf, sizeof(buf), "%d", y);
		geometry->add_property(X_("y_pos"), string(buf));
		snprintf(buf, sizeof(buf), "%d", xoff);
		geometry->add_property(X_("x_off"), string(buf));
		snprintf(buf, sizeof(buf), "%d", yoff);
		geometry->add_property(X_("y_off"), string(buf));

		snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&rhs_pane1)->gobj()));
		geometry->add_property(X_("mixer_rhs_pane1_pos"), string(buf));
		snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&rhs_pane2)->gobj()));
		geometry->add_property(X_("mixer_rhs_pane2_pos"), string(buf));
		snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&list_hpane)->gobj()));
		geometry->add_property(X_("mixer_list_hpane_pos"), string(buf));

		node->add_child_nocopy (*geometry);
	}

	node->add_property ("narrow-strips", _strip_width == Narrow ? "yes" : "no");

	return *node;
}


void 
Mixer_UI::pane_allocation_handler (Allocation& alloc, Gtk::Paned* which)
{
	int pos;
	XMLProperty* prop = 0;
	char buf[32];
	XMLNode* node = ARDOUR_UI::instance()->mixer_settings();
	XMLNode* geometry;
	int width, height;
	static int32_t done[3] = { 0, 0, 0 };

	if ((geometry = find_named_node (*node, "geometry")) == 0) {
		width = default_width;
		height = default_height;
	} else {
		width = atoi(geometry->property("x_size")->value());
		height = atoi(geometry->property("y_size")->value());
	}

	if (which == static_cast<Gtk::Paned*> (&rhs_pane1)) {

		if (done[0]) {
			return;
		}

		if (!geometry || (prop = geometry->property("mixer_rhs_pane1_pos")) == 0) {
			pos = height / 3;
			snprintf (buf, sizeof(buf), "%d", pos);
		} else {
			pos = atoi (prop->value());
		}

		if ((done[0] = GTK_WIDGET(rhs_pane1.gobj())->allocation.height > pos)) {
			rhs_pane1.set_position (pos);
		}

	} else if (which == static_cast<Gtk::Paned*> (&rhs_pane2)) {

		if (done[1]) {
			return;
		}

		if (!geometry || (prop = geometry->property("mixer_rhs_pane2_pos")) == 0) {
			pos = height / 3;
			snprintf (buf, sizeof(buf), "%d", pos);
		} else {
			pos = atoi (prop->value());
		}

		if ((done[1] = GTK_WIDGET(rhs_pane2.gobj())->allocation.height > pos)) {
			rhs_pane2.set_position (pos);
		}

	} else if (which == static_cast<Gtk::Paned*> (&list_hpane)) {

		if (done[2]) {
			return;
		}

		if (!geometry || (prop = geometry->property("mixer_list_hpane_pos")) == 0) {
			pos = 75;
			snprintf (buf, sizeof(buf), "%d", pos);
		} else {
			pos = atoi (prop->value());
		}

		if ((done[2] = GTK_WIDGET(list_hpane.gobj())->allocation.width > pos)) {
			list_hpane.set_position (pos);
		}
	}
}