ardour/gtk2_ardour/triggerbox_ui.cc

/*
 * Copyright (C) 2021 Paul Davis <paul@linuxaudiosystems.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <vector>

#include <gtkmm/filechooserdialog.h>
#include <gtkmm/menu.h>
#include <gtkmm/menuitem.h>
#include <gtkmm/stock.h>

#include "pbd/compose.h"
#include "pbd/convert.h"

#include "ardour/region.h"
#include "ardour/triggerbox.h"

#include "canvas/polygon.h"
#include "canvas/text.h"

#include "gtkmm2ext/actions.h"
#include "gtkmm2ext/colors.h"
#include "gtkmm2ext/utils.h"

#include "ardour_ui.h"
#include "gui_thread.h"
#include "triggerbox_ui.h"
#include "trigger_ui.h"
#include "public_editor.h"
#include "region_view.h"
#include "selection.h"
#include "timers.h"
#include "ui_config.h"
#include "utils.h"

#include "pbd/i18n.h"

using namespace ARDOUR;
using namespace ArdourCanvas;
using namespace Gtkmm2ext;
using namespace PBD;

TriggerEntry::TriggerEntry (Item* item, ARDOUR::Trigger& t)
	: ArdourCanvas::Rectangle (item)
	, _trigger (t)
{
	set_layout_sensitive(true);  //why???

	name = string_compose ("trigger %1", _trigger.index());

	set_outline (false);

	play_button = new ArdourCanvas::Rectangle (this);
	play_button->set_outline (true);
	play_button->set_fill(true);
	play_button->name = string_compose ("playbutton %1", _trigger.index());
	play_button->show ();

	play_shape = new ArdourCanvas::Polygon (play_button);
	play_shape->name = string_compose ("playshape %1", _trigger.index());
	play_shape->show ();

	name_button = new ArdourCanvas::Rectangle (this);
	name_button->set_outline (true);
	name_button->set_fill(true);
	name_button->name = ("slot_selector_button");
	name_button->show ();

	name_text = new Text (name_button);
	name_text->set_ignore_events (false);
	name_text->show();
	
	/* watch for change in theme */
	UIConfiguration::instance().ParameterChanged.connect (sigc::mem_fun (*this, &TriggerEntry::ui_parameter_changed));
	set_default_colors();

	_trigger.PropertyChanged.connect (trigger_prop_connection, MISSING_INVALIDATOR, boost::bind (&TriggerEntry::prop_change, this, _1), gui_context());
	dynamic_cast<Stripable*> (_trigger.box().owner())->presentation_info().Change.connect (owner_prop_connection, MISSING_INVALIDATOR, boost::bind (&TriggerEntry::owner_prop_change, this, _1), gui_context());

	PropertyChange changed;
	changed.add (ARDOUR::Properties::name);
	changed.add (ARDOUR::Properties::running);
	prop_change (changed);

	selection_change();
}

TriggerEntry::~TriggerEntry ()
{
}

void
TriggerEntry::owner_prop_change (PropertyChange const & pc)
{
	if (pc.contains (Properties::color)) {
		owner_color_changed ();
	}
}

void
TriggerEntry::owner_color_changed ()
{
	//ToDo
}

void
TriggerEntry::selection_change ()
{
	if (PublicEditor::instance().get_selection().selected (this)) {
		name_button->set_outline_color (UIConfiguration::instance().color ("alert:red"));
	} else {
		set_default_colors();
	}
}

void
TriggerEntry::maybe_update ()
{
	//what here?
}

void
TriggerEntry::_size_allocate (ArdourCanvas::Rect const & alloc)
{
	Rectangle::_size_allocate (alloc);

	const Distance width = _rect.width();
	const Distance height = _rect.height();

	play_button->set (ArdourCanvas::Rect (0, 0, height, height));
	name_button->set (ArdourCanvas::Rect (height, 0, width, height));

	const double scale = UIConfiguration::instance().get_ui_scale();
	poly_margin = 2. * scale;
	poly_size = height - 2*poly_margin;
	shape_play_button ();

	float tleft = height;  //make room for the play button

	name_text->size_allocate (ArdourCanvas::Rect(0, 0, width, height));
	name_text->set_position (Duple (tleft + poly_margin, poly_margin -0.5));
	name_text->clamp_width ( width - height - height );

	//font scale may have changed. uiconfig 'embeds' the ui-scale in the font
	name_text->set_font_description (UIConfiguration::instance().get_NormalFont());
}

void draw_follow_icon( Cairo::RefPtr<Cairo::Context> context, Trigger::FollowAction icon, float size, float scale ) {

	context->set_line_width ( 1*scale );

	switch (icon) {
		case Trigger::Stop:
			context->rectangle ( 6*scale, 6*scale, size-12*scale, size-12*scale );
			context->stroke();
		break;
		case Trigger::Again:
			context->arc ( size/2, size/2, size*0.20, 60.*(M_PI/180.0), 2*M_PI );
			context->stroke();
			context->arc ( size/2+size*0.2, size/2, 1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
		break;
		case Trigger::NextTrigger:
			context->move_to ( size/2, 3*scale );
			context->line_to ( size/2, size-5*scale );
			context->stroke();
			context->arc ( size/2, size-5*scale, 1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
		break;
		case Trigger::PrevTrigger:
			context->move_to ( size/2, 5*scale );
			context->line_to ( size/2, size-3*scale );
			context->stroke();
			context->arc ( size/2, 5*scale, 1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
		break;
		case Trigger::QueuedTrigger: {
			Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
			layout->set_font_description ( UIConfiguration::instance().get_SmallMonospaceFont() );
			layout->set_text (icon == Trigger::AnyTrigger ? "&" : "@");
			int tw, th; layout->get_pixel_size (tw, th);
			context->move_to ( size/2, size/2 );
			context->rel_move_to ( -tw/2, -th/2 );
			layout->show_in_cairo_context (context);
		} break;
		case Trigger::AnyTrigger: {
			context->move_to ( size/2, 3*scale );
			context->line_to ( size/2, size-3*scale );
			context->move_to ( size/2, size/2 );
			context->line_to ( size/2-3*scale, size/2 );
			context->stroke();
			context->arc ( size/2,         4*scale,      1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
			context->arc ( size/2,         size-3*scale, 1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
			context->arc ( size/2-3*scale, size/2,       1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
		} break;
		case Trigger::OtherTrigger: {
			context->move_to ( size/2, 3*scale );
			context->line_to ( size/2, 7*scale );
			context->move_to ( size/2, size-7*scale );
			context->line_to ( size/2, size-3*scale );
			context->stroke();
			context->arc ( size/2, 3*scale,      1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
			context->arc ( size/2, size-3*scale, 1.5*scale, 0, 2*M_PI );  //arrow head
			context->fill();
		} break;
		default:
		break;
	}
}

void
TriggerEntry::render (ArdourCanvas::Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
{
	Rectangle::render(area, context);

	/* Note that item_to_window() already takes _position into account (as
	   part of item_to_canvas()
	*/
	ArdourCanvas::Rect self (item_to_window (_rect));
	const ArdourCanvas::Rect draw = self.intersection (area);

	if (!draw) {
		return;
	}

	float width = _rect.width();
	float height = _rect.height();

	const double scale = UIConfiguration::instance().get_ui_scale();

	if (_fill && !_transparent) {
		setup_fill_context (context);
		context->rectangle (draw.x0, draw.y0, draw.width(), draw.height());
		context->fill ();
	}

	render_children (area, context);

	if (_trigger.index()==1) {
		//drop-shadow at top
		Cairo::RefPtr<Cairo::LinearGradient> drop_shadow_pattern = Cairo::LinearGradient::create (0.0, 0.0, 0.0, 6*scale);
		drop_shadow_pattern->add_color_stop_rgba (0,	0,	0,	0,	0.7);
		drop_shadow_pattern->add_color_stop_rgba (1,	0,	0,	0,	0.0);
		context->set_source (drop_shadow_pattern);
		context->rectangle(0, 0, width, 6*scale );
		context->fill ();
	} else if (_trigger.index()%2==0) {
		//line at top
		context->set_identity_matrix();
		context->translate (self.x0, self.y0-0.5);
		set_source_rgba (context, rgba_to_color (0,0,0,1));
		context->rectangle(0, 0, width, 1);
		context->fill ();
		context->set_identity_matrix();
	}

	//follow-action icon
	if (_trigger.region()) {
		context->set_identity_matrix();
		context->translate (self.x0, self.y0-0.5);
		context->translate ( width - height, 0);  //right side of the widget
		set_source_rgba (context, UIConfiguration::instance().color("neutral:midground"));
		draw_follow_icon( context, _trigger.follow_action(0), height, scale );
		context->set_identity_matrix();
	}

}

void
TriggerEntry::shape_play_button ()
{
	Points p;

	if (!_trigger.region()) {
		/* no region, so must be a stop button, drawn as a square */
		p.push_back (Duple (poly_margin, poly_margin));
		p.push_back (Duple (poly_margin, poly_size));
		p.push_back (Duple (poly_size, poly_size));
		p.push_back (Duple (poly_size, poly_margin));
	} else {
		/* region exists; draw triangle to show that we can trigger */
		p.push_back (Duple (poly_margin, poly_margin));
		p.push_back (Duple (poly_margin, poly_size));
		p.push_back (Duple (poly_size, 0.5+poly_size / 2.));
	}

	play_shape->set (p);

	if (_trigger.active()) {
		play_shape->set_outline (false);
		play_shape->set_fill (true);
	} else {
		play_shape->set_outline (true);
		play_shape->set_fill (false);
	}
}

void
TriggerEntry::prop_change (PropertyChange const & change)
{
	bool need_pb = false;

	if (change.contains (ARDOUR::Properties::name)) {
		if (_trigger.region()) {
			name_text->set (short_version (_trigger.name(), 16));
		} else {
			name_text->set ("");
		}

		need_pb = true;
	}

	if (change.contains (ARDOUR::Properties::running)) {
		need_pb = true;
	}

	if (change.contains (ARDOUR::Properties::follow_action0)) {
		redraw();
	}

	if (need_pb) {
		shape_play_button ();
	}
}

void
TriggerEntry::set_default_colors ()
{
	set_fill_color (UIConfiguration::instance().color ("theme:bg"));
	play_button->set_fill_color (UIConfiguration::instance().color("theme:bg"));
	play_button->set_outline_color (UIConfiguration::instance().color("theme:bg"));
	name_button->set_fill_color (UIConfiguration::instance().color("theme:bg"));
	name_button->set_outline_color (UIConfiguration::instance().color("theme:bg"));
	if ((_trigger.index()/2)%2==0) {
		set_fill_color (HSV (fill_color()).darker(0.15).color ());
		play_button->set_fill_color (HSV (fill_color()).darker(0.15).color ());
		play_button->set_outline_color (HSV (fill_color()).darker(0.15).color ());
		name_button->set_fill_color (HSV (fill_color()).darker(0.15).color ());
		name_button->set_outline_color (HSV (fill_color()).darker(0.15).color ());
	}

	name_text->set_color (UIConfiguration::instance().color("neutral:foreground"));
	name_text->set_fill_color (UIConfiguration::instance().color("neutral:midground"));

	if (_trigger.region()) {
		play_shape->set_outline_color (UIConfiguration::instance().color("neutral:foreground"));
		play_shape->set_fill_color (UIConfiguration::instance().color("neutral:foreground"));
	} else {
		play_shape->set_outline_color (UIConfiguration::instance().color("neutral:midground"));
		play_shape->set_fill_color (UIConfiguration::instance().color("neutral:midground"));
	}

	/*preserve selection border*/
	if (PublicEditor::instance().get_selection().selected (this)) {
		name_button->set_outline_color (UIConfiguration::instance().color ("alert:red"));
	}
}

void
TriggerEntry::ui_parameter_changed (std::string const& p)
{
	if (p == "color-file") {
		set_default_colors();
	}
}

Gtkmm2ext::Bindings* TriggerBoxUI::bindings = 0;
Glib::RefPtr<Gtk::ActionGroup> TriggerBoxUI::trigger_actions;

TriggerBoxUI::TriggerBoxUI (ArdourCanvas::Item* parent, TriggerBox& tb)
	: Rectangle (parent)
	, _triggerbox (tb)
	, file_chooser (0)
	, _context_menu (0)
{
	set_layout_sensitive(true);  //why???

	set_fill_color (UIConfiguration::instance().color(X_("theme:bg")));
	set_fill (true);

	build ();

	selection_connection = PublicEditor::instance().get_selection().TriggersChanged.connect (sigc::mem_fun (*this, &TriggerBoxUI::selection_changed));

	std::vector<Gtk::TargetEntry> target_table;
	target_table.push_back (Gtk::TargetEntry ("regions"));
	target_table.push_back (Gtk::TargetEntry ("text/uri-list"));
	target_table.push_back (Gtk::TargetEntry ("text/plain"));
	target_table.push_back (Gtk::TargetEntry ("application/x-rootwin-drop"));

	GtkCanvas* gtkcanvas = static_cast<GtkCanvas*> (canvas());
	assert (gtkcanvas);
	gtkcanvas->drag_dest_set (target_table);
	gtkcanvas->signal_drag_motion().connect (sigc::mem_fun(*this, &TriggerBoxUI::drag_motion));
	gtkcanvas->signal_drag_leave().connect (sigc::mem_fun(*this, &TriggerBoxUI::drag_leave));
	gtkcanvas->signal_drag_data_received().connect (sigc::mem_fun(*this, &TriggerBoxUI::drag_data_received));
}

TriggerBoxUI::~TriggerBoxUI ()
{
	update_connection.disconnect ();
	selection_connection.disconnect ();
}

void
TriggerBoxUI::selection_changed ()
{
	for (auto & slot : _slots) {
		slot->selection_change ();
	}
}

void
TriggerBoxUI::setup_actions_and_bindings ()
{
	load_bindings ();
	register_actions ();
}

void
TriggerBoxUI::load_bindings ()
{
	bindings = Bindings::get_bindings (X_("Triggers"));
}

void
TriggerBoxUI::register_actions ()
{
	trigger_actions = ActionManager::create_action_group (bindings, X_("Triggers"));

	for (int32_t n = 0; n < TriggerBox::default_triggers_per_box; ++n) {
		const std::string action_name = string_compose ("trigger-scene-%1", n);
		const std::string display_name = string_compose (_("Scene %1"), n);

		ActionManager::register_toggle_action (trigger_actions, action_name.c_str(), display_name.c_str(), sigc::bind (sigc::ptr_fun (TriggerBoxUI::trigger_scene), n));
	}
}

void
TriggerBoxUI::trigger_scene (int32_t n)
{
	TriggerBox::scene_bang (n);
}

void
TriggerBoxUI::build ()
{
	Trigger* t;
	uint64_t n = 0;

	// clear_items (true);

	_slots.clear ();

	while (true) {
		t = _triggerbox.trigger (n);
		if (!t) {
			break;
		}
		TriggerEntry* te = new TriggerEntry (this, *t);

		_slots.push_back (te);

		te->play_button->Event.connect (sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::play_button_event), n));
		te->name_button->Event.connect (sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::text_button_event), n));
//		te->Event.connect (sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::event), n));

		++n;
	}
}

void
TriggerBoxUI::_size_allocate (ArdourCanvas::Rect const & alloc)
{
	Rectangle::_size_allocate (alloc);

	const float width = alloc.width();
	const float height = alloc.height();

	const float slot_h = height / TriggerBox::default_triggers_per_box;  //ToDo

	float ypos = 0;
	for (auto & slot : _slots) {
		slot->size_allocate (ArdourCanvas::Rect(0, 0, width, slot_h));
		slot->set_position (Duple (0, ypos));
		ypos += slot_h;
		slot->show();
	}

}

bool
TriggerBoxUI::text_button_event (GdkEvent* ev, uint64_t n)
{
	switch (ev->type) {
	case GDK_ENTER_NOTIFY:
		if (ev->crossing.detail != GDK_NOTIFY_INFERIOR) {
			_slots[n]->name_text->set_color (UIConfiguration::instance().color ("neutral:foregroundest"));
			_slots[n]->name_button->set_fill_color (HSV (fill_color()).lighter(0.15).color ());
		}
		break;
	case GDK_LEAVE_NOTIFY:
		if (ev->crossing.detail != GDK_NOTIFY_INFERIOR) {
			_slots[n]->set_default_colors();
		}
		break;
	case GDK_BUTTON_PRESS:
		if (_slots[n]->trigger().region()) {
			PublicEditor::instance().get_selection().set (_slots[n]);
			//a side-effect of selection-change is that the slot's color is reset. retain the "entered-color" here:
			_slots[n]->name_text->set_color (UIConfiguration::instance().color ("neutral:foregroundest"));
			_slots[n]->name_button->set_fill_color (HSV (fill_color()).lighter(0.15).color ());
		}
		break;
	case GDK_2BUTTON_PRESS:
		edit_trigger (n);
		return true;
	case GDK_BUTTON_RELEASE:
		switch (ev->button.button) {
		case 3:
			context_menu (n);
			return true;
		default:
			break;
		}
		break;
	default:
		break;
	}

	return false;
}

bool
TriggerBoxUI::play_button_event (GdkEvent *ev, uint64_t n)
{
	if (!_triggerbox.trigger (n)->region()) {
		/* this is a stop button */
		switch (ev->type) {
		case GDK_BUTTON_PRESS:
			if (ev->button.button == 1) {
				_triggerbox.request_stop_all ();
				return true;
			}
		default:
			break;
		}

		return false;
	}

	switch (ev->type) {
	case GDK_BUTTON_PRESS:
		switch (ev->button.button) {
		case 1:
			_slots[n]->trigger().bang ();
			return true;
		default:
			break;
		}
		break;
	case GDK_BUTTON_RELEASE:
		switch (ev->button.button) {
		case 1:
			if (_slots[n]->trigger().launch_style() == Trigger::Gate ||
			    _slots[n]->trigger().launch_style() == Trigger::Repeat) {
				_slots[n]->trigger().unbang ();
			}
			break;
		default:
			break;
		}
		break;
	case GDK_ENTER_NOTIFY:
		if (ev->crossing.detail != GDK_NOTIFY_INFERIOR) {
			_slots[n]->play_button->set_fill_color (HSV (fill_color()).lighter(0.15).color ());
			_slots[n]->play_shape->set_fill_color (UIConfiguration::instance().color ("neutral:foregroundest"));
			_slots[n]->play_shape->set_outline_color (UIConfiguration::instance().color ("neutral:foregroundest"));
		}
		break;
	case GDK_LEAVE_NOTIFY:
		if (ev->crossing.detail != GDK_NOTIFY_INFERIOR) {
			_slots[n]->set_default_colors();
		}
		break;
	default:
		break;
	}
	return false;
}

void
TriggerBoxUI::context_menu (uint64_t n)
{
	using namespace Gtk;
	using namespace Gtk::Menu_Helpers;
	using namespace Temporal;

	delete _context_menu;

	_context_menu = new Menu;
	MenuList& items = _context_menu->items();
	_context_menu->set_name ("ArdourContextMenu");

	Menu* follow_menu = manage (new Menu);
	MenuList& fitems = follow_menu->items();

	RadioMenuItem::Group fagroup;
	RadioMenuItem::Group lagroup;
	RadioMenuItem::Group qgroup;

	fitems.push_back (RadioMenuElem (fagroup, _("Stop"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::Stop)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::Stop) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
	fitems.push_back (RadioMenuElem (fagroup, _("Again"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::Again)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::Again) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
#if QUEUED_SLOTS_IMPLEMENTED
	fitems.push_back (RadioMenuElem (fagroup, _("Queued"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::QueuedTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::QueuedTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
#endif
	fitems.push_back (RadioMenuElem (fagroup, _("Next"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::NextTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::NextTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
	fitems.push_back (RadioMenuElem (fagroup, _("Previous"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::PrevTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::PrevTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
	fitems.push_back (RadioMenuElem (fagroup, _("First"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::FirstTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::FirstTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
	fitems.push_back (RadioMenuElem (fagroup, _("Last"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::LastTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::LastTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
	fitems.push_back (RadioMenuElem (fagroup, _("Any"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::AnyTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::AnyTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}
	fitems.push_back (RadioMenuElem (fagroup, _("Other"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_follow_action), n, Trigger::OtherTrigger)));
	if (_triggerbox.trigger (n)->follow_action(0) == Trigger::OtherTrigger) {
		dynamic_cast<Gtk::CheckMenuItem*> (&fitems.back ())->set_active (true);
	}

	Menu* launch_menu = manage (new Menu);
	MenuList& litems = launch_menu->items();

	litems.push_back (RadioMenuElem (lagroup, _("One Shot"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_launch_style), n, Trigger::OneShot)));
	if (_triggerbox.trigger (n)->launch_style() == Trigger::OneShot) {
		dynamic_cast<Gtk::CheckMenuItem*> (&litems.back ())->set_active (true);
	}
	litems.push_back (RadioMenuElem (lagroup, _("Gate"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_launch_style), n, Trigger::Gate)));
	if (_triggerbox.trigger (n)->launch_style() == Trigger::Gate) {
		dynamic_cast<Gtk::CheckMenuItem*> (&litems.back ())->set_active (true);
	}
	litems.push_back (RadioMenuElem (lagroup, _("Toggle"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_launch_style), n, Trigger::Toggle)));
	if (_triggerbox.trigger (n)->launch_style() == Trigger::Toggle) {
		dynamic_cast<Gtk::CheckMenuItem*> (&litems.back ())->set_active (true);
	}
	litems.push_back (RadioMenuElem (lagroup, _("Repeat"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_launch_style), n, Trigger::Repeat)));
	if (_triggerbox.trigger (n)->launch_style() == Trigger::Repeat) {
		dynamic_cast<Gtk::CheckMenuItem*> (&litems.back ())->set_active (true);
	}

	Menu* quant_menu = manage (new Menu);
	MenuList& qitems = quant_menu->items();
	bool success;

	Beats grid_beats (PublicEditor::instance().get_grid_type_as_beats (success, timepos_t (0)));
	BBT_Offset b;

	if (success) {
		b = BBT_Offset (0, grid_beats.get_beats(), grid_beats.get_ticks());
		qitems.push_back (RadioMenuElem (fagroup, _("Main Grid"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
		/* can't mark this active because the current trigger quant setting may just a specific setting below */
		/* XXX HOW TO GET THIS TO FOLLOW GRID CHANGES (which are GUI only) */
	}

	b = BBT_Offset (1, 0, 0);
	qitems.push_back (RadioMenuElem (qgroup, _("Bars"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}

	b = BBT_Offset (0, 4, 0);
	qitems.push_back (RadioMenuElem (qgroup, _("Whole"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}
	b = BBT_Offset (0, 2, 0);
	qitems.push_back (RadioMenuElem (qgroup, _("Half"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}
	b = BBT_Offset (0, 1, 0);
	qitems.push_back (RadioMenuElem (qgroup, _("Quarters"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}
	b = BBT_Offset (0, 0, ticks_per_beat/2);
	qitems.push_back (RadioMenuElem (qgroup, _("Eighths"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}
	b = BBT_Offset (0, 0, ticks_per_beat/4);
	qitems.push_back (RadioMenuElem (qgroup, _("Sixteenths"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}
	b = BBT_Offset (0, 0, ticks_per_beat/8);
	qitems.push_back (RadioMenuElem (qgroup, _("Thirty-Seconds"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}
	b = BBT_Offset (0, 0, ticks_per_beat/16);
	qitems.push_back (RadioMenuElem (qgroup, _("Sixty-Fourths"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_quantization), n, b)));
	if (_triggerbox.trigger (n)->quantization() == b) {
		dynamic_cast<Gtk::CheckMenuItem*> (&qitems.back ())->set_active (true);
	}

	Menu* load_menu = manage (new Menu);
	MenuList& loitems (load_menu->items());

	loitems.push_back (MenuElem (_("from file"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::choose_sample), n)));
	loitems.push_back (MenuElem (_("from selection"), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::set_from_selection), n)));

	items.push_back (MenuElem (_("Load..."), *load_menu));
	items.push_back (MenuElem (_("Edit..."), sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::edit_trigger), n)));
	items.push_back (MenuElem (_("Follow Action..."), *follow_menu));
	items.push_back (MenuElem (_("Launch Style..."), *launch_menu));
	items.push_back (MenuElem (_("Quantization..."), *quant_menu));

	_context_menu->popup (1, gtk_get_current_event_time());
}

void
TriggerBoxUI::edit_trigger (uint64_t n)
{
	Trigger* trigger = _triggerbox.trigger (n);
	TriggerWindow* tw = static_cast<TriggerWindow*> (trigger->ui());

	if (!tw) {
		tw = new TriggerWindow (_triggerbox.trigger (n));
		trigger->set_ui (tw);
	}

	tw->present ();
}

void
TriggerBoxUI::set_follow_action (uint64_t n, Trigger::FollowAction fa)
{
	_triggerbox.trigger (n)->set_follow_action (fa, 0);
}

void
TriggerBoxUI::set_launch_style (uint64_t n, Trigger::LaunchStyle ls)
{
	_triggerbox.trigger (n)->set_launch_style (ls);
}

void
TriggerBoxUI::set_quantization (uint64_t n, Temporal::BBT_Offset const & q)
{
	_triggerbox.trigger (n)->set_quantization (q);
}

void
TriggerBoxUI::choose_sample (uint64_t n)
{
	if (!file_chooser) {
		file_chooser = new Gtk::FileChooserDialog (_("Select sample"), Gtk::FILE_CHOOSER_ACTION_OPEN);
		file_chooser->add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
		file_chooser->add_button(Gtk::Stock::OK, Gtk::RESPONSE_OK);
		file_chooser->set_select_multiple (true);
	}

	file_chooser_connection.disconnect ();
	file_chooser_connection = file_chooser->signal_response().connect (sigc::bind (sigc::mem_fun (*this, &TriggerBoxUI::sample_chosen), n));

	file_chooser->present ();
}

void
TriggerBoxUI::sample_chosen (int response, uint64_t n)
{
	file_chooser->hide ();

	switch (response) {
	case Gtk::RESPONSE_OK:
		break;
	default:
		return;
	}

	std::list<std::string> paths = file_chooser->get_filenames ();

	for (std::list<std::string>::iterator s = paths.begin(); s != paths.end(); ++s) {
		/* this will do nothing if n is too large */
		_triggerbox.set_from_path (n, *s);
		++n;
	}
}

uint64_t
TriggerBoxUI::slot_at_y (int y) const
{
	uint64_t n = 0;
	for (auto& slot : _slots) {
		if (slot->height () < y) {
			++n;
			y -= slot->height ();
		}
	}
	return n;
}

bool
TriggerBoxUI::drag_motion (Glib::RefPtr<Gdk::DragContext>const& context, int, int y, guint time)
{
	bool can_drop = true;
	uint64_t n = slot_at_y (y);
	if (n >= _slots.size ()) {
		assert (0);
		can_drop = false;
	}

	if (can_drop) {
		context->drag_status(Gdk::ACTION_COPY, time);
		/* prelight */
		GdkEventCrossing ev;
		ev.detail = GDK_NOTIFY_ANCESTOR;
		for (size_t i = 0; i < _slots.size (); ++i) {
			ev.type = (i == n) ? GDK_ENTER_NOTIFY : GDK_LEAVE_NOTIFY;
				text_button_event ((GdkEvent*)&ev, i);
		}
		return true;
	} else {
		context->drag_status (Gdk::DragAction (0), time);
		return false;
	}
}

void
TriggerBoxUI::drag_leave (Glib::RefPtr<Gdk::DragContext>const&, guint)
{
	GdkEventCrossing ev;
	ev.type = GDK_LEAVE_NOTIFY;
	ev.detail = GDK_NOTIFY_ANCESTOR;
	for (size_t i = 0; i < _slots.size (); ++i) {
		text_button_event ((GdkEvent*)&ev, i);
	}
}

void
TriggerBoxUI::drag_data_received (Glib::RefPtr<Gdk::DragContext> const& context, int /*x*/, int y, Gtk::SelectionData const& data, guint /*info*/, guint time)
{
	uint64_t n = slot_at_y (y);
	if (n >= _slots.size ()) {
		context->drag_finish (false, false, time);
		return;
	}
	if (data.get_target() == X_("regions")) {
		boost::shared_ptr<Region> region = PublicEditor::instance().get_dragged_region_from_sidebar ();
		if (region) {
			_triggerbox.set_from_selection (n, region);
			context->drag_finish (true, false, time);
		} else {
			context->drag_finish (false, false, time);
		}
		return;
	}

	std::vector<std::string> paths;
	if (ARDOUR_UI_UTILS::convert_drop_to_paths (paths, data)) {
		for (std::vector<std::string>::iterator s = paths.begin (); s != paths.end (); ++s) {
			/* this will do nothing if n is too large */
			_triggerbox.set_from_path (n, *s);
			++n;
		}
	}
	context->drag_finish (true, false, time);
}

void
TriggerBoxUI::set_from_selection (uint64_t n)
{
	Selection& selection (PublicEditor::instance().get_selection());
	RegionSelection rselection (selection.regions);

	if (rselection.empty()) {
		/* XXX possible message about no selection ? */
		return;
	}

	for (RegionSelection::iterator r = rselection.begin(); r != rselection.end(); ++r) {
		_triggerbox.set_from_selection (n, (*r)->region());
		++n;
	}
}

void
TriggerBoxUI::start_updating ()
{
	update_connection = Timers::rapid_connect (sigc::mem_fun (*this, &TriggerBoxUI::rapid_update));
}

void
TriggerBoxUI::stop_updating ()
{
	update_connection.disconnect ();
}

void
TriggerBoxUI::rapid_update ()
{
	for (auto & slot : _slots) {
		slot->maybe_update ();
	}
}

TriggerBoxWidget::TriggerBoxWidget (float w, float h) : FittedCanvasWidget(w,h), ui (0)
{
	set_background_color (UIConfiguration::instance().color (X_("theme:bg")));
}

void
TriggerBoxWidget::set_triggerbox (TriggerBox* tb)
{
	if (ui) {
		root()->remove (ui);
		delete ui;
		ui = 0;
	}

	if (!tb) {
		return;
	}

	ui = new TriggerBoxUI (root(), *tb);
	repeat_size_allocation ();

	if (is_mapped()) {
		ui->start_updating ();
	}
}

void
TriggerBoxWidget::on_map ()
{
	FittedCanvasWidget::on_map ();

	if (ui) {
		ui->start_updating ();
	}
}

void
TriggerBoxWidget::on_unmap ()
{
	FittedCanvasWidget::on_unmap ();
	if (ui) {
		ui->stop_updating ();
	}
}