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livetrax/gtk2_ardour/port_matrix_component.cc

210 lines
4.7 KiB
C++

/*
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 "port_matrix_component.h"
#include "port_matrix.h"
#include "port_matrix_body.h"
using namespace std;
/** Constructor.
* @param p Port matrix that we're in.
*/
PortMatrixComponent::PortMatrixComponent (PortMatrix* m, PortMatrixBody* b)
: _matrix (m),
_body (b),
_pixmap (0),
_render_required (true),
_dimension_computation_required (true)
{
}
/** Destructor */
PortMatrixComponent::~PortMatrixComponent ()
{
if (_pixmap) {
gdk_pixmap_unref (_pixmap);
}
}
void
PortMatrixComponent::setup ()
{
_dimension_computation_required = true;
_render_required = true;
}
GdkPixmap *
PortMatrixComponent::get_pixmap (GdkDrawable *drawable)
{
if (_render_required) {
if (_dimension_computation_required) {
compute_dimensions ();
_dimension_computation_required = false;
_body->component_size_changed ();
}
/* we may be zero width or height; if so, just
use the smallest allowable pixmap */
if (_width == 0) {
_width = 1;
}
if (_height == 0) {
_height = 1;
}
/* make a pixmap of the right size */
if (_pixmap) {
gdk_pixmap_unref (_pixmap);
}
_pixmap = gdk_pixmap_new (drawable, _width, _height, -1);
/* render */
cairo_t* cr = gdk_cairo_create (_pixmap);
render (cr);
cairo_destroy (cr);
_render_required = false;
}
return _pixmap;
}
void
PortMatrixComponent::set_source_rgb (cairo_t *cr, Gdk::Color const & c)
{
cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
}
void
PortMatrixComponent::set_source_rgba (cairo_t *cr, Gdk::Color const & c, double a)
{
cairo_set_source_rgba (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p(), a);
}
pair<uint32_t, uint32_t>
PortMatrixComponent::dimensions ()
{
if (_dimension_computation_required) {
compute_dimensions ();
_dimension_computation_required = false;
_body->component_size_changed ();
}
return make_pair (_width, _height);
}
Gdk::Color
PortMatrixComponent::background_colour ()
{
return _matrix->get_style()->get_bg (Gtk::STATE_NORMAL);
}
/** @param g Group.
* @return Visible size of the group in grid units, taking visibility and show_only_bundles into account.
*/
uint32_t
PortMatrixComponent::group_size (boost::shared_ptr<const PortGroup> g) const
{
uint32_t s = 0;
PortGroup::BundleList const & bundles = g->bundles ();
if (_matrix->show_only_bundles()) {
s = bundles.size();
} else {
for (PortGroup::BundleList::const_iterator i = bundles.begin(); i != bundles.end(); ++i) {
s += (*i)->bundle->nchannels();
}
}
return s;
}
/** @param bc Channel.
* @param groups List of groups.
* @return Position of bc in groups in grid units, taking show_only_bundles into account.
*/
uint32_t
PortMatrixComponent::channel_to_position (ARDOUR::BundleChannel bc, boost::shared_ptr<const PortGroup> group) const
{
uint32_t p = 0;
PortGroup::BundleList const & bundles = group->bundles ();
for (PortGroup::BundleList::const_iterator i = bundles.begin(); i != bundles.end(); ++i) {
if ((*i)->bundle == bc.bundle) {
/* found the bundle */
if (_matrix->show_only_bundles()) {
return p;
} else {
return p + bc.channel;
}
}
/* move past this bundle */
if (_matrix->show_only_bundles()) {
p += 1;
} else {
p += (*i)->bundle->nchannels ();
}
}
return 0;
}
ARDOUR::BundleChannel
PortMatrixComponent::position_to_channel (double p, double, boost::shared_ptr<const PortGroup> group) const
{
p /= grid_spacing ();
PortGroup::BundleList const & bundles = group->bundles ();
for (PortGroup::BundleList::const_iterator j = bundles.begin(); j != bundles.end(); ++j) {
if (_matrix->show_only_bundles()) {
if (p < 1) {
return ARDOUR::BundleChannel ((*j)->bundle, -1);
} else {
p -= 1;
}
} else {
uint32_t const s = (*j)->bundle->nchannels ();
if (p < s) {
return ARDOUR::BundleChannel ((*j)->bundle, p);
} else {
p -= s;
}
}
}
return ARDOUR::BundleChannel (boost::shared_ptr<ARDOUR::Bundle> (), -1);
}