ardour/gtk2_ardour/port_matrix_grid.cc

/*
    Copyright (C) 2002-2009 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 <iostream>
#include <cairo/cairo.h>
#include "ardour/bundle.h"
#include "ardour/types.h"
#include "port_matrix_grid.h"
#include "port_matrix.h"
#include "port_matrix_body.h"

PortMatrixGrid::PortMatrixGrid (PortMatrix* m, PortMatrixBody* b)
	: PortMatrixComponent (m, b)
{
	
}

void
PortMatrixGrid::compute_dimensions ()
{
	_width = 0;
	ARDOUR::BundleList const c = _matrix->columns()->bundles();
	if (_matrix->show_only_bundles()) {
		_width = c.size() * column_width();
	} else {
		for (ARDOUR::BundleList::const_iterator i = c.begin(); i != c.end(); ++i) {
			_width += (*i)->nchannels() * column_width();
		}
	}

	_height = 0;
	ARDOUR::BundleList const r = _matrix->rows()->bundles();
	if (_matrix->show_only_bundles()) {
		_height = r.size() * column_width();
	} else {
		for (ARDOUR::BundleList::const_iterator i = r.begin(); i != r.end(); ++i) {
			_height += (*i)->nchannels() * row_height();
		}
	}
}


void
PortMatrixGrid::render (cairo_t* cr)
{
	/* BACKGROUND */
	
	set_source_rgb (cr, background_colour());
	cairo_rectangle (cr, 0, 0, _width, _height);
	cairo_fill (cr);

	/* VERTICAL GRID LINES */
	
	set_source_rgb (cr, grid_colour());
	uint32_t x = 0;
	ARDOUR::BundleList const c = _matrix->columns()->bundles();
	for (ARDOUR::BundleList::size_type i = 0; i < c.size(); ++i) {

		if (!_matrix->show_only_bundles()) {
			cairo_set_line_width (cr, thin_grid_line_width());
			for (uint32_t j = 1; j < c[i]->nchannels(); ++j) {
				x += column_width();
				cairo_move_to (cr, x, 0);
				cairo_line_to (cr, x, _height);
				cairo_stroke (cr);
			}
		}

		if (i < (c.size() - 1)) {
			x += column_width();
			cairo_set_line_width (cr, thick_grid_line_width());
			cairo_move_to (cr, x, 0);
			cairo_line_to (cr, x, _height);
			cairo_stroke (cr);
		}
        }
		
 	uint32_t grid_width = x + column_width();

	/* HORIZONTAL GRID LINES */
	
	uint32_t y = 0;
	ARDOUR::BundleList const r = _matrix->rows()->bundles();
	for (ARDOUR::BundleList::size_type i = 0; i < r.size(); ++i) {

		if (!_matrix->show_only_bundles()) {
			cairo_set_line_width (cr, thin_grid_line_width());
			for (uint32_t j = 1; j < r[i]->nchannels(); ++j) {
				y += row_height();
				cairo_move_to (cr, 0, y);
				cairo_line_to (cr, grid_width, y);
				cairo_stroke (cr);
			}
		}

		if (i < (r.size() - 1)) {
			y += row_height();
			cairo_set_line_width (cr, thick_grid_line_width());
			cairo_move_to (cr, 0, y);
			cairo_line_to (cr, grid_width, y);
			cairo_stroke (cr);
		}
	}

	/* ASSOCIATION INDICATORS */
	
	uint32_t bx = 0;
	uint32_t by = 0;

	if (_matrix->show_only_bundles()) {

		for (ARDOUR::BundleList::const_iterator i = c.begin(); i < c.end(); ++i) {
			by = 0;
			
			for (ARDOUR::BundleList::const_iterator j = r.begin(); j < r.end(); ++j) {

				PortMatrixNode::State s = bundle_to_bundle_state (*i, *j);
				switch (s) {
				case PortMatrixNode::UNKNOWN:
					draw_unknown_indicator (cr, bx, by);
					break;
				case PortMatrixNode::ASSOCIATED:
					draw_association_indicator (cr, bx, by);
					break;
				case PortMatrixNode::PARTIAL:
					draw_association_indicator (cr, bx, by, 0.5);
					break;
				}
				
				by += row_height();
			}
			
			bx += column_width();
		}

	} else {

		for (ARDOUR::BundleList::const_iterator i = c.begin(); i < c.end(); ++i) {
			by = 0;
			
			for (ARDOUR::BundleList::const_iterator j = r.begin(); j < r.end(); ++j) {
				
				x = bx;
				for (uint32_t k = 0; k < (*i)->nchannels (); ++k) {
					
					y = by;
					for (uint32_t l = 0; l < (*j)->nchannels (); ++l) {
						
						ARDOUR::BundleChannel c[2];
						c[_matrix->column_index()] = ARDOUR::BundleChannel (*i, k);
						c[_matrix->row_index()] = ARDOUR::BundleChannel (*j, l);
						
						PortMatrixNode::State const s = _matrix->get_state (c);
						
						switch (s) {
						case PortMatrixNode::ASSOCIATED:
							draw_association_indicator (cr, x, y);
							break;
							
						case PortMatrixNode::UNKNOWN:
							draw_unknown_indicator (cr, x, y);
							break;
							
						case PortMatrixNode::NOT_ASSOCIATED:
							break;
						}
						
						y += row_height();
					}
					
					x += column_width();
				}
				
				by += (*j)->nchannels () * row_height();
			}
			
			bx += (*i)->nchannels () * column_width();
		}
	}
}

void
PortMatrixGrid::draw_association_indicator (cairo_t* cr, uint32_t x, uint32_t y, double p)
{
	set_source_rgba (cr, association_colour(), 0.5);
	cairo_arc (
		cr,
		x + column_width() / 2,
		y + column_width() / 2,
		(column_width() - (2 * connection_indicator_pad())) / 2,
		0,
		p * 2 * M_PI
		);
	
	cairo_fill (cr);
}

void
PortMatrixGrid::draw_unknown_indicator (cairo_t* cr, uint32_t x, uint32_t y)
{
	set_source_rgba (cr, unknown_colour(), 0.5);
	cairo_rectangle (
		cr,
		x + thick_grid_line_width(),
		y + thick_grid_line_width(),
		column_width() - 2 * thick_grid_line_width(),
		row_height() - 2 * thick_grid_line_width()
		);
	cairo_fill (cr);
}

PortMatrixNode
PortMatrixGrid::position_to_node (double x, double y) const
{
	return PortMatrixNode (
		position_to_channel (y, _matrix->rows()->bundles(), row_height()),
		position_to_channel (x, _matrix->columns()->bundles(), column_width())
		);
}


ARDOUR::BundleChannel
PortMatrixGrid::position_to_channel (double p, ARDOUR::BundleList const& bundles, double inc) const
{
	uint32_t pos = p / inc;

	if (_matrix->show_only_bundles()) {
		
		for (ARDOUR::BundleList::const_iterator i = bundles.begin(); i != bundles.end(); ++i) {
			if (pos == 0) {
				return ARDOUR::BundleChannel (*i, 0);
			} else {
				pos--;
			}
		}

	} else {

		for (ARDOUR::BundleList::const_iterator i = bundles.begin(); i != bundles.end(); ++i) {
			if (pos < (*i)->nchannels()) {
				return ARDOUR::BundleChannel (*i, pos);
			} else {
				pos -= (*i)->nchannels();
			}
		}
		
	}
			
	return ARDOUR::BundleChannel (boost::shared_ptr<ARDOUR::Bundle> (), 0);
}


double
PortMatrixGrid::channel_position (
	ARDOUR::BundleChannel bc,
	ARDOUR::BundleList const& bundles,
	double inc) const
{
	double p = 0;
	
	ARDOUR::BundleList::const_iterator i = bundles.begin ();
	while (i != bundles.end() && *i != bc.bundle) {

		if (_matrix->show_only_bundles()) {
			p += inc;
		} else {
			p += inc * (*i)->nchannels();
		}
		
		++i;
	}

	if (i == bundles.end()) {
		return 0;
	}

	p += inc * bc.channel;

	return p;
}

void
PortMatrixGrid::button_press (double x, double y, int b)
{
	PortMatrixNode const node = position_to_node (x, y);

	if (_matrix->show_only_bundles()) {

		PortMatrixNode::State const s = bundle_to_bundle_state (node.column.bundle, node.row.bundle);

		for (uint32_t i = 0; i < node.column.bundle->nchannels(); ++i) {
			for (uint32_t j = 0; j < node.row.bundle->nchannels(); ++j) {
				
				ARDOUR::BundleChannel c[2];
				c[_matrix->column_index()] = ARDOUR::BundleChannel (node.column.bundle, i);
				c[_matrix->row_index()] = ARDOUR::BundleChannel (node.row.bundle, j);
				if (s == PortMatrixNode::NOT_ASSOCIATED || s == PortMatrixNode::PARTIAL) {
					_matrix->set_state (c, i == j);
				} else {
					_matrix->set_state (c, false);
				}
			}
		}
		
	} else {
	
		if (node.row.bundle && node.column.bundle) {
			
			ARDOUR::BundleChannel c[2];
			c[_matrix->row_index()] = node.row;
			c[_matrix->column_index()] = node.column;
			
			PortMatrixNode::State const s = _matrix->get_state (c);
			
			if (s == PortMatrixNode::ASSOCIATED || s == PortMatrixNode::NOT_ASSOCIATED) {
				
				bool const n = !(s == PortMatrixNode::ASSOCIATED);
				
				ARDOUR::BundleChannel c[2];
				c[_matrix->row_index()] = node.row;
				c[_matrix->column_index()] = node.column;
				
				_matrix->set_state (c, n);
			}
			
		}
	}

	require_render ();
	_body->queue_draw ();
}

void
PortMatrixGrid::draw_extra (cairo_t* cr)
{
	set_source_rgba (cr, mouseover_line_colour(), 0.3);
	cairo_set_line_width (cr, mouseover_line_width());

	double const x = component_to_parent_x (
		channel_position (_body->mouseover().column, _matrix->columns()->bundles(), column_width()) + column_width() / 2
		);
	
	double const y = component_to_parent_y (
		channel_position (_body->mouseover().row, _matrix->rows()->bundles(), row_height()) + row_height() / 2
		);
	
	if (_body->mouseover().row.bundle) {

		cairo_move_to (cr, x, y);
		if (_matrix->arrangement() == PortMatrix::LEFT_TO_BOTTOM) {
			cairo_line_to (cr, component_to_parent_x (0), y);
		} else if (_matrix->arrangement() == PortMatrix::TOP_TO_RIGHT) {
			cairo_line_to (cr, _parent_rectangle.get_x() + _parent_rectangle.get_width(), y);
		}
		cairo_stroke (cr);
	}

	if (_body->mouseover().column.bundle) {

		cairo_move_to (cr, x, y);
		if (_matrix->arrangement() == PortMatrix::LEFT_TO_BOTTOM) {
			cairo_line_to (cr, x, _parent_rectangle.get_y() + _parent_rectangle.get_height());
		} else if (_matrix->arrangement() == PortMatrix::TOP_TO_RIGHT) {
			cairo_line_to (cr, x, component_to_parent_y (0));
		}
		cairo_stroke (cr);
	}
}

void
PortMatrixGrid::mouseover_changed (PortMatrixNode const& old)
{
	queue_draw_for (old);
	queue_draw_for (_body->mouseover());
}

void
PortMatrixGrid::mouseover_event (double x, double y)
{
	_body->set_mouseover (position_to_node (x, y));
}

void
PortMatrixGrid::queue_draw_for (PortMatrixNode const &n)
{
	if (n.row.bundle) {

		double const y = channel_position (n.row, _matrix->rows()->bundles(), row_height());
		_body->queue_draw_area (
			_parent_rectangle.get_x(),
			component_to_parent_y (y),
			_parent_rectangle.get_width(),
			row_height()
			);
	}

	if (n.column.bundle) {

		double const x = channel_position (n.column, _matrix->columns()->bundles(), column_width());
		
		_body->queue_draw_area (
			component_to_parent_x (x),
			_parent_rectangle.get_y(),
			column_width(),
			_parent_rectangle.get_height()
			);
	}
}

double
PortMatrixGrid::component_to_parent_x (double x) const
{
	return x - _body->xoffset() + _parent_rectangle.get_x();
}

double
PortMatrixGrid::parent_to_component_x (double x) const
{
	return x + _body->xoffset() - _parent_rectangle.get_x();
}

double
PortMatrixGrid::component_to_parent_y (double y) const
{
	return y - _body->yoffset() + _parent_rectangle.get_y();
}

double
PortMatrixGrid::parent_to_component_y (double y) const
{
	return y + _body->yoffset() - _parent_rectangle.get_y();
}

PortMatrixNode::State
PortMatrixGrid::bundle_to_bundle_state (boost::shared_ptr<ARDOUR::Bundle> a, boost::shared_ptr<ARDOUR::Bundle> b) const
{
	bool have_unknown = false;
	bool have_off_diagonal_association = false;
	bool have_diagonal_association = false;
	bool have_diagonal_not_association = false;
				
	for (uint32_t i = 0; i < a->nchannels (); ++i) {
					
		for (uint32_t j = 0; j < b->nchannels (); ++j) {
						
			ARDOUR::BundleChannel c[2];
			c[_matrix->column_index()] = ARDOUR::BundleChannel (a, i);
			c[_matrix->row_index()] = ARDOUR::BundleChannel (b, j);
			
			PortMatrixNode::State const s = _matrix->get_state (c);

			switch (s) {
			case PortMatrixNode::ASSOCIATED:
				if (i == j) {
					have_diagonal_association = true;
				} else {
					have_off_diagonal_association = true;
				}
				break;
				
			case PortMatrixNode::UNKNOWN:
				have_unknown = true;
				break;
				
			case PortMatrixNode::NOT_ASSOCIATED:
				if (i == j) {
					have_diagonal_not_association = true;
				}
				break;
			}
		}
	}
	
	if (have_unknown) {
		return PortMatrixNode::UNKNOWN;
	} else if (have_diagonal_association && !have_off_diagonal_association && !have_diagonal_not_association) {
		return PortMatrixNode::ASSOCIATED;
	} else if (!have_diagonal_association && !have_off_diagonal_association) {
		return PortMatrixNode::NOT_ASSOCIATED;
	}

	return PortMatrixNode::PARTIAL;
}