gtk2_ardour/port_matrix_component.cc

   1 /*
   2     Copyright (C) 2002-2009 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include "port_matrix_component.h"
  21 #include "port_matrix.h"
  22 #include "port_matrix_body.h"
  23
  24 using namespace std;
  25
  26 /** Constructor.
  27  *  @param p Port matrix that we're in.
  28  */
  29 PortMatrixComponent::PortMatrixComponent (PortMatrix* m, PortMatrixBody* b)
  30         : _matrix (m),
  31           _body (b),
  32           _pixmap (0),
  33           _render_required (true),
  34           _dimension_computation_required (true)
  35 {
  36
  37 }
  38
  39 /** Destructor */
  40 PortMatrixComponent::~PortMatrixComponent ()
  41 {
  42         if (_pixmap) {
  43                 gdk_pixmap_unref (_pixmap);
  44         }
  45 }
  46
  47 void
  48 PortMatrixComponent::setup ()
  49 {
  50         _dimension_computation_required = true;
  51         _render_required = true;
  52 }
  53
  54 GdkPixmap *
  55 PortMatrixComponent::get_pixmap (GdkDrawable *drawable)
  56 {
  57         if (_render_required) {
  58
  59                 if (_dimension_computation_required) {
  60                         compute_dimensions ();
  61                         _dimension_computation_required = false;
  62                         _body->component_size_changed ();
  63                 }
  64
  65                 /* we may be zero width or height; if so, just
  66                    use the smallest allowable pixmap */
  67                 if (_width == 0) {
  68                         _width = 1;
  69                 }
  70                 if (_height == 0) {
  71                         _height = 1;
  72                 }
  73
  74                 /* make a pixmap of the right size */
  75                 if (_pixmap) {
  76                         gdk_pixmap_unref (_pixmap);
  77                 }
  78                 _pixmap = gdk_pixmap_new (drawable, _width, _height, -1);
  79
  80                 /* render */
  81                 cairo_t* cr = gdk_cairo_create (_pixmap);
  82                 render (cr);
  83                 cairo_destroy (cr);
  84
  85                 _render_required = false;
  86         }
  87
  88         return _pixmap;
  89 }
  90
  91 void
  92 PortMatrixComponent::set_source_rgb (cairo_t *cr, Gdk::Color const & c)
  93 {
  94         cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
  95 }
  96
  97 void
  98 PortMatrixComponent::set_source_rgba (cairo_t *cr, Gdk::Color const & c, double a)
  99 {
 100         cairo_set_source_rgba (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p(), a);
 101 }
 102
 103 pair<uint32_t, uint32_t>
 104 PortMatrixComponent::dimensions ()
 105 {
 106         if (_dimension_computation_required) {
 107                 compute_dimensions ();
 108                 _dimension_computation_required = false;
 109                 _body->component_size_changed ();
 110         }
 111
 112         return make_pair (_width, _height);
 113 }
 114
 115 Gdk::Color
 116 PortMatrixComponent::background_colour ()
 117 {
 118         return _matrix->get_style()->get_bg (Gtk::STATE_NORMAL);
 119 }
 120
 121 /** @param g Group.
 122  *  @return Visible size of the group in grid units, taking visibility and show_only_bundles into account.
 123  */
 124 uint32_t
 125 PortMatrixComponent::group_size (boost::shared_ptr<const PortGroup> g) const
 126 {
 127         uint32_t s = 0;
 128
 129         if (g->visible()) {
 130                 PortGroup::BundleList const & bundles = g->bundles ();
 131                 if (_matrix->show_only_bundles()) {
 132                         s = bundles.size();
 133                 } else {
 134                         for (PortGroup::BundleList::const_iterator i = bundles.begin(); i != bundles.end(); ++i) {
 135                                 s += i->bundle->nchannels();
 136                         }
 137                 }
 138         } else {
 139                 s = 1;
 140         }
 141
 142         return s;
 143 }
 144
 145 /** @param bc Channel.
 146  *  @param groups List of groups.
 147  *  @return Position of bc in groups in grid units, taking visibility and show_only_bundles into account.
 148  */
 149 uint32_t
 150 PortMatrixComponent::channel_to_position (ARDOUR::BundleChannel bc, PortGroupList const * groups) const
 151 {
 152         uint32_t p = 0;
 153
 154         for (PortGroupList::List::const_iterator i = groups->begin(); i != groups->end(); ++i) {
 155
 156                 PortGroup::BundleList const & bundles = (*i)->bundles ();
 157
 158                 for (PortGroup::BundleList::const_iterator j = bundles.begin(); j != bundles.end(); ++j) {
 159
 160                         if (j->bundle == bc.bundle) {
 161
 162                                 /* found the bundle */
 163
 164                                 if (_matrix->show_only_bundles() || !(*i)->visible()) {
 165                                         return p;
 166                                 } else {
 167                                         return p + bc.channel;
 168                                 }
 169
 170                         }
 171
 172                         if ((*i)->visible()) {
 173
 174                                 /* move past this bundle */
 175
 176                                 if (_matrix->show_only_bundles()) {
 177                                         p += 1;
 178                                 } else {
 179                                         p += j->bundle->nchannels ();
 180                                 }
 181                         }
 182                 }
 183
 184                 if (!(*i)->visible()) {
 185                         /* if this group isn't visible we won't have updated p, so do it now */
 186                         p += 1;
 187                 }
 188         }
 189
 190         return 0;
 191 }
 192
 193
 194 pair<boost::shared_ptr<PortGroup>, ARDOUR::BundleChannel>
 195 PortMatrixComponent::position_to_group_and_channel (uint32_t p, PortGroupList const * groups) const
 196 {
 197         PortGroupList::List::const_iterator i = groups->begin ();
 198
 199         while (i != groups->end()) {
 200
 201                 uint32_t const gs = group_size (*i);
 202
 203                 if (p < gs) {
 204
 205                         /* it's in this group */
 206
 207                         if (!(*i)->visible()) {
 208                                 return make_pair (*i, ARDOUR::BundleChannel (boost::shared_ptr<ARDOUR::Bundle> (), 0));
 209                         }
 210
 211                         PortGroup::BundleList const & bundles = (*i)->bundles ();
 212                         for (PortGroup::BundleList::const_iterator j = bundles.begin(); j != bundles.end(); ++j) {
 213
 214                                 if (_matrix->show_only_bundles()) {
 215
 216                                         if (p == 0) {
 217                                                 return make_pair (*i, ARDOUR::BundleChannel (j->bundle, 0));
 218                                         } else {
 219                                                 p -= 1;
 220                                         }
 221
 222                                 } else {
 223
 224                                         uint32_t const s = j->bundle->nchannels ();
 225                                         if (p < s) {
 226                                                 return make_pair (*i, ARDOUR::BundleChannel (j->bundle, p));
 227                                         } else {
 228                                                 p -= s;
 229                                         }
 230
 231                                 }
 232
 233                         }
 234
 235                 } else {
 236
 237                         p -= gs;
 238
 239                 }
 240
 241                 ++i;
 242         }
 243
 244         return make_pair (boost::shared_ptr<PortGroup> (), ARDOUR::BundleChannel (boost::shared_ptr<ARDOUR::Bundle> (), 0));
 245 }