Initial import of gtk2_ardour.

git-svn-id: svn://localhost/trunk/ardour2@24 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 636 insertions, 0 deletions

diff --git a/gtk2_ardour/panner2d.cc b/gtk2_ardour/panner2d.cc
new file mode 100644
index 0000000000..ceec33868b
--- /dev/null
+++ b/gtk2_ardour/panner2d.cc
@@ -0,0 +1,636 @@
+/*
+    Copyright (C) 2002 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 <cmath>
+#include <climits>
+#include <string.h>
+
+#include <pbd/error.h>
+#include <ardour/panner.h>
+#include <gtkmmext/gtk_ui.h>
+
+#include "panner2d.h"
+#include "keyboard.h"
+#include "gui_thread.h"
+
+#include "i18n.h"
+
+using namespace std;
+using namespace Gtk;
+using namespace SigC;
+using namespace ARDOUR;
+
+Panner2d::Target::Target (float xa, float ya, const char *txt)
+	: x (xa), y (ya), text (txt ? strdup (txt) : 0)
+{
+	if (text) {
+		textlen = strlen (txt);
+	} else {
+		textlen = 0;
+	}
+}
+
+Panner2d::Target::~Target ()
+{ 
+	if (text) {
+		free (text);
+	}
+}
+
+Panner2d::Panner2d (Panner& p, int32_t w, int32_t h)
+	: panner (p), width (w), height (h)
+{
+	context_menu = 0;
+	bypass_menu_item = 0;
+
+	allow_x = false;
+	allow_y = false;
+	allow_target = false;
+
+	panner.StateChanged.connect (slot (*this, &Panner2d::handle_state_change));
+	
+	drag_target = 0;
+	set_events (GDK_BUTTON_PRESS_MASK|GDK_BUTTON_RELEASE_MASK|GDK_POINTER_MOTION_MASK);
+
+}
+
+Panner2d::~Panner2d()
+{
+	for (Targets::iterator i = targets.begin(); i != targets.end(); ++i) {
+		delete i->second;
+	}
+}
+
+void
+Panner2d::reset (uint32_t n_inputs)
+{
+	/* add pucks */
+	
+	drop_pucks ();
+	
+	switch (n_inputs) {
+	case 0:
+		break;
+		
+	case 1:
+		add_puck ("", 0.0f, 0.5f);
+		break;
+		
+	case 2:
+		add_puck ("L", 0.5f, 0.25f);
+		add_puck ("R", 0.25f, 0.5f);
+		show_puck (0);
+		show_puck (1);
+		break;
+		
+	default:
+		for (uint32_t i = 0; i < n_inputs; ++i) {
+			char buf[64];
+			snprintf (buf, sizeof (buf), "%" PRIu32, i);
+			add_puck (buf, 0.0f, 0.5f);
+			show_puck (i);
+		}
+		break;
+	}
+	
+	/* add all outputs */
+	
+	drop_targets ();
+	
+	for (uint32_t n = 0; n < panner.nouts(); ++n) {
+		add_target (panner.output (n).x, panner.output (n).y);
+	}
+	
+	allow_x_motion (true);
+	allow_y_motion (true);
+	allow_target_motion (true);
+}
+
+void
+Panner2d::size_allocate_impl (GtkAllocation *alloc)
+{
+	width = alloc->width;
+	height = alloc->height;
+
+	DrawingArea::size_allocate_impl (alloc);
+}
+
+int
+Panner2d::add_puck (const char* text, float x, float y)
+{
+	Target* puck = new Target (x, y, text);
+
+	pair<int,Target *> newpair;
+	newpair.first = pucks.size();
+	newpair.second = puck;
+
+	pucks.insert (newpair);
+	puck->visible = true;
+	
+	return 0;
+}
+
+int
+Panner2d::add_target (float x, float y)
+{
+	Target *target = new Target (x, y, "");
+
+	pair<int,Target *> newpair;
+	newpair.first = targets.size();
+	newpair.second = target;
+
+	targets.insert (newpair);
+	target->visible = true;
+	queue_draw ();
+
+	return newpair.first;
+}
+
+void
+Panner2d::drop_targets ()
+{
+	for (Targets::iterator i = targets.begin(); i != targets.end(); ) {
+
+		Targets::iterator tmp;
+
+		tmp = i;
+		++tmp;
+
+		delete i->second;
+		targets.erase (i);
+
+		i = tmp;
+	}
+
+	queue_draw ();
+}
+
+void
+Panner2d::drop_pucks ()
+{
+	for (Targets::iterator i = pucks.begin(); i != pucks.end(); ) {
+
+		Targets::iterator tmp;
+
+		tmp = i;
+		++tmp;
+
+		delete i->second;
+		pucks.erase (i);
+
+		i = tmp;
+	}
+
+	queue_draw ();
+}
+
+void
+Panner2d::remove_target (int which)
+{
+	Targets::iterator i = targets.find (which);
+
+	if (i != targets.end()) {
+		delete i->second;
+		targets.erase (i);
+		queue_draw ();
+	}
+}		
+
+void
+Panner2d::handle_state_change ()
+{
+	ENSURE_GUI_THREAD(slot (*this, &Panner2d::handle_state_change));
+
+	queue_draw ();
+}
+
+void
+Panner2d::move_target (int which, float x, float y)
+{
+	Targets::iterator i = targets.find (which);
+	Target *target;
+
+	if (!allow_target) {
+		return;
+	}
+
+	if (i != targets.end()) {
+		target = i->second;
+		target->x = x;
+		target->y = y;
+		
+		queue_draw ();
+	}
+}		
+
+void
+Panner2d::move_puck (int which, float x, float y)
+{
+	Targets::iterator i = pucks.find (which);
+	Target *target;
+
+	if (i != pucks.end()) {
+		target = i->second;
+		target->x = x;
+		target->y = y;
+		
+		queue_draw ();
+	}
+}		
+
+void
+Panner2d::show_puck (int which)
+{
+	Targets::iterator i = pucks.find (which);
+
+	if (i != pucks.end()) {
+		Target* puck = i->second;
+		if (!puck->visible) {
+			puck->visible = true;
+			queue_draw ();
+		}
+	}
+}
+
+void
+Panner2d::hide_puck (int which)
+{
+	Targets::iterator i = pucks.find (which);
+
+	if (i != pucks.end()) {
+		Target* puck = i->second;
+		if (!puck->visible) {
+			puck->visible = false;
+			queue_draw ();
+		}
+	}
+}
+
+void
+Panner2d::show_target (int which)
+{
+	Targets::iterator i = targets.find (which);
+	if (i != targets.end()) {
+		if (!i->second->visible) {
+			i->second->visible = true;
+			queue_draw ();
+		}
+	}
+}
+
+void
+Panner2d::hide_target (int which)
+{
+	Targets::iterator i = targets.find (which);
+	if (i != targets.end()) {
+		if (i->second->visible) {
+			i->second->visible = false;
+			queue_draw ();
+		}
+	}
+}
+
+Panner2d::Target *
+Panner2d::find_closest_object (gdouble x, gdouble y, int& which, bool& is_puck) const
+{
+	gdouble efx, efy;
+	Target *closest = 0;
+	Target *candidate;
+	float distance;
+	float best_distance = FLT_MAX;
+	int pwhich;
+
+	efx = x/width;
+	efy = y/height;
+	which = 0;
+	pwhich = 0;
+	is_puck = false;
+
+	for (Targets::const_iterator i = targets.begin(); i != targets.end(); ++i, ++which) {
+		candidate = i->second;
+
+		distance = sqrt ((candidate->x - efx) * (candidate->x - efx) +
+				 (candidate->y - efy) * (candidate->y - efy));
+
+		if (distance < best_distance) {
+			closest = candidate;
+			best_distance = distance;
+		}
+	}
+
+	for (Targets::const_iterator i = pucks.begin(); i != pucks.end(); ++i, ++pwhich) {
+		candidate = i->second;
+
+		distance = sqrt ((candidate->x - efx) * (candidate->x - efx) +
+				 (candidate->y - efy) * (candidate->y - efy));
+
+		if (distance < best_distance) {
+			closest = candidate;
+			best_distance = distance;
+			is_puck = true;
+			which = pwhich;
+		}
+	}
+	
+	return closest;
+}		
+
+gint
+Panner2d::motion_notify_event_impl (GdkEventMotion *ev)
+{
+	gint x, y;
+	GdkModifierType state;
+
+	if (ev->is_hint) {
+		gdk_window_get_pointer (ev->window, &x, &y, &state);
+	} else {
+		x = (int) floor (ev->x);
+		y = (int) floor (ev->y);
+		state = (GdkModifierType) ev->state;
+	}
+	return handle_motion (x, y, state);
+}
+gint
+Panner2d::handle_motion (gint evx, gint evy, GdkModifierType state)
+{
+	if (drag_target == 0 || (state & GDK_BUTTON1_MASK) == 0) {
+		return FALSE;
+	}
+
+	int x, y;
+	bool need_move = false;
+
+	if (!drag_is_puck && !allow_target) {
+		return TRUE;
+	}
+
+	if (allow_x || !drag_is_puck) {
+		float new_x;
+		x = min (evx, width - 1);
+		x = max (x, 0);
+		new_x = (float) x / (width - 1);
+		if (new_x != drag_target->x) {
+			drag_target->x = new_x;
+			need_move = true;
+		}
+	}
+
+	if (allow_y || drag_is_puck) {
+		float new_y;
+		y = min (evy, height - 1);
+		y = max (y, 0);
+		new_y = (float) y / (height - 1);
+		if (new_y != drag_target->y) {
+			drag_target->y = new_y;
+			need_move = true;
+		}
+	}
+
+	if (need_move) {
+		queue_draw ();
+
+		if (drag_is_puck) {
+			
+			panner[drag_index]->set_position (drag_target->x, drag_target->y);
+
+		} else {
+
+			TargetMoved (drag_index);
+		}
+	}
+
+	return TRUE;
+}
+
+gint
+Panner2d::expose_event_impl (GdkEventExpose *event)
+{
+	gint x, y;
+	float fx, fy;
+
+	/* redraw the background */
+
+	get_window().draw_rectangle (get_style()->get_bg_gc(get_state()),
+				     true,
+				     event->area.x, event->area.y,
+				     event->area.width, event->area.height);
+	
+
+	if (!panner.bypassed()) {
+
+		for (Targets::iterator i = pucks.begin(); i != pucks.end(); ++i) {
+
+			Target* puck = i->second;
+
+			if (puck->visible) {
+				/* redraw puck */
+				
+				fx = min (puck->x, 1.0f);
+				fx = max (fx, -1.0f);
+				x = (gint) floor (width * fx - 4);
+				
+				fy = min (puck->y, 1.0f);
+				fy = max (fy, -1.0f);
+				y = (gint) floor (height * fy - 4);
+				
+				get_window().draw_arc (get_style()->get_fg_gc(GTK_STATE_NORMAL),
+						       true,
+						       x, y,
+						       8, 8,
+						       0, 360 * 64);
+				get_window().draw_text (get_style()->get_font(),
+							get_style()->get_fg_gc(GTK_STATE_NORMAL),
+							x + 6, y + 6,
+							puck->text,
+							puck->textlen);
+			}
+		}
+
+		/* redraw any visible targets */
+
+		for (Targets::iterator i = targets.begin(); i != targets.end(); ++i) {
+			Target *target = i->second;
+
+			if (target->visible) {
+				
+				/* why -8 ??? why is this necessary ? */
+				
+				fx = min (target->x, 1.0f);
+				fx = max (fx, -1.0f);
+				x = (gint) floor ((width - 8) * fx);
+			
+				fy = min (target->y, 1.0f);
+				fy = max (fy, -1.0f);
+				y = (gint) floor ((height - 8) * fy);
+
+				get_window().draw_rectangle (get_style()->get_fg_gc(GTK_STATE_ACTIVE),
+							     true,
+							     x, y,
+							     4, 4);
+			}
+		}
+	}
+
+	return TRUE;
+}
+
+gint
+Panner2d::button_press_event_impl (GdkEventButton *ev)
+{
+	switch (ev->button) {
+	case 1:
+		gint x, y;
+		GdkModifierType state;
+
+		drag_target = find_closest_object (ev->x, ev->y, drag_index, drag_is_puck);
+		
+		x = (int) floor (ev->x);
+		y = (int) floor (ev->y);
+		state = (GdkModifierType) ev->state;
+
+		return handle_motion (x, y, state);
+		break;
+	default:
+		break;
+	}
+	
+	return FALSE;
+}
+
+gint
+Panner2d::button_release_event_impl (GdkEventButton *ev)
+{
+	switch (ev->button) {
+	case 1:
+		gint x, y;
+		int ret;
+		GdkModifierType state;
+
+		x = (int) floor (ev->x);
+		y = (int) floor (ev->y);
+		state = (GdkModifierType) ev->state;
+
+		if (drag_is_puck && (Keyboard::modifier_state_contains (state, Keyboard::Shift))) {
+			
+			for (Targets::iterator i = pucks.begin(); i != pucks.end(); ++i) {
+				Target* puck = i->second;
+				puck->x = 0.5;
+				puck->y = 0.5;
+			}
+
+			queue_draw ();
+			PuckMoved (-1);
+		        ret = TRUE;
+
+		} else {
+			ret = handle_motion (x, y, state);
+		}
+		
+		drag_target = 0;
+
+		return ret;
+		break;
+	case 2:
+		toggle_bypass ();
+		return TRUE;
+
+	case 3:
+		show_context_menu ();
+		break;
+
+	}
+
+	return FALSE;
+}
+
+void
+Panner2d::toggle_bypass ()
+{
+	if (bypass_menu_item && (panner.bypassed() != bypass_menu_item->get_active())) {
+		panner.set_bypassed (!panner.bypassed());
+	}
+}
+
+void
+Panner2d::show_context_menu ()
+{
+	using namespace Menu_Helpers;
+
+	if (context_menu == 0) {
+		context_menu = manage (new Menu);
+		context_menu->set_name ("ArdourContextMenu");
+		MenuList& items = context_menu->items();
+
+		items.push_back (CheckMenuElem (_("Bypass")));
+		bypass_menu_item = static_cast<CheckMenuItem*> (items.back());
+		bypass_menu_item->toggled.connect (slot (*this, &Panner2d::toggle_bypass));
+
+	} 
+
+	bypass_menu_item->set_active (panner.bypassed());
+	context_menu->popup (1, 0);
+}
+
+void
+Panner2d::allow_x_motion (bool yn)
+{
+	allow_x = yn;
+}
+
+void
+Panner2d::allow_target_motion (bool yn)
+{
+	allow_target = yn;
+}
+
+void
+Panner2d::allow_y_motion (bool yn)
+{
+	allow_y = yn;
+}
+
+int
+Panner2d::puck_position (int which, float& x, float& y)
+{
+	Targets::iterator i;
+
+	if ((i = pucks.find (which)) != pucks.end()) {
+		x = i->second->x;
+		y = i->second->y;
+		return 0;
+	}
+
+	return -1;
+}
+
+int
+Panner2d::target_position (int which, float& x, float& y)
+{
+	Targets::iterator i;
+
+	if ((i = targets.find (which)) != targets.end()) {
+		x = i->second->x;
+		y = i->second->y;
+		return 0;
+	}
+
+	return -1;
+}
+