gtk2_ardour/canvas-note-event.cc

   1 /*
   2     Copyright (C) 2007 Paul Davis
   3     Author: David Robillard
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 */
  19
  20 #include <iostream>
  21
  22 #include "gtkmm2ext/keyboard.h"
  23
  24 #include "canvas-note-event.h"
  25 #include "midi_region_view.h"
  26 #include "public_editor.h"
  27 #include "editing_syms.h"
  28 #include "keyboard.h"
  29
  30 using namespace std;
  31 using namespace Gtkmm2ext;
  32 using ARDOUR::MidiModel;
  33
  34 namespace Gnome {
  35 namespace Canvas {
  36
  37 PBD::Signal1<void,CanvasNoteEvent*> CanvasNoteEvent::CanvasNoteEventDeleted;
  38
  39 /// dividing the hue circle in 16 parts, hand adjusted for equal look, courtesy Thorsten Wilms
  40 const uint32_t CanvasNoteEvent::midi_channel_colors[16] = {
  41           0xd32d2dff,  0xd36b2dff,  0xd3972dff,  0xd3d12dff,
  42           0xa0d32dff,  0x7dd32dff,  0x2dd45eff,  0x2dd3c4ff,
  43           0x2da5d3ff,  0x2d6fd3ff,  0x432dd3ff,  0x662dd3ff,
  44           0x832dd3ff,  0xa92dd3ff,  0xd32dbfff,  0xd32d67ff
  45         };
  46
  47 CanvasNoteEvent::CanvasNoteEvent(MidiRegionView& region, Item* item, const boost::shared_ptr<NoteType> note)
  48         : _region(region)
  49         , _item(item)
  50         , _text(0)
  51         , _channel_selector_widget()
  52         , _state(None)
  53         , _note(note)
  54         , _selected(false)
  55         , _valid (true)
  56         , _mouse_x_fraction (-1.0)
  57         , _mouse_y_fraction (-1.0)
  58 {
  59 }
  60
  61 CanvasNoteEvent::~CanvasNoteEvent()
  62 {
  63         CanvasNoteEventDeleted (this);
  64
  65         if (_text) {
  66                 _text->hide();
  67                 delete _text;
  68         }
  69
  70         delete _channel_selector_widget;
  71 }
  72
  73 void
  74 CanvasNoteEvent::invalidate ()
  75 {
  76         _valid = false;
  77 }
  78
  79 void
  80 CanvasNoteEvent::validate ()
  81 {
  82         _valid = true;
  83 }
  84
  85 void
  86 CanvasNoteEvent::show_velocity()
  87 {
  88         if (!_text) {
  89                 _text = new NoEventText (*(_item->property_parent()));
  90                 _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  91                 _text->property_justification() = Gtk::JUSTIFY_CENTER;
  92         }
  93
  94         _text->property_x() = (x1() + x2()) /2;
  95         _text->property_y() = (y1() + y2()) /2;
  96         ostringstream velo(ios::ate);
  97         velo << int(_note->velocity());
  98         _text->property_text() = velo.str();
  99         _text->show();
 100         _text->raise_to_top();
 101 }
 102
 103 void
 104 CanvasNoteEvent::hide_velocity()
 105 {
 106         if (_text) {
 107                 _text->hide();
 108                 delete _text;
 109                 _text = 0;
 110         }
 111 }
 112
 113 void
 114 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 115 {
 116         // make note change its color if its channel is not marked active
 117         if ( (selection & (1 << _note->channel())) == 0 ) {
 118                 set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 119                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 120         } else {
 121                 // set the color according to the notes selection state
 122                 set_selected(_selected);
 123         }
 124         // this forces the item to update..... maybe slow...
 125         _item->hide();
 126         _item->show();
 127 }
 128
 129 void
 130 CanvasNoteEvent::on_channel_change(uint8_t channel)
 131 {
 132         _region.note_selected(this, true);
 133         hide_channel_selector();
 134         _region.change_channel(channel);
 135 }
 136
 137 void
 138 CanvasNoteEvent::show_channel_selector(void)
 139 {
 140         if (_channel_selector_widget == 0) {
 141
 142                 if(_region.channel_selector_scoped_note() != 0){
 143                     _region.channel_selector_scoped_note()->hide_channel_selector();
 144                     _region.set_channel_selector_scoped_note(0);
 145                 }
 146
 147                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 148                 _channel_selector->show_all();
 149                 _channel_selector->channel_selected.connect(
 150                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 151
 152                 _channel_selector->clicked.connect (
 153                         sigc::mem_fun (this, &CanvasNoteEvent::hide_channel_selector));
 154
 155                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 156                                                       x1(),
 157                                                       y2() + 2,
 158                                                       (Gtk::Widget &) *_channel_selector);
 159
 160                 _channel_selector_widget->hide();
 161                 _channel_selector_widget->property_height() = 100;
 162                 _channel_selector_widget->property_width() = 100;
 163                 _channel_selector_widget->raise_to_top();
 164                 _channel_selector_widget->show();
 165
 166                 _region.set_channel_selector_scoped_note(this);
 167         } else {
 168                 hide_channel_selector();
 169         }
 170 }
 171
 172 void
 173 CanvasNoteEvent::hide_channel_selector(void)
 174 {
 175         if (_channel_selector_widget) {
 176                 _channel_selector_widget->hide();
 177                 delete _channel_selector_widget;
 178                 _channel_selector_widget = 0;
 179         }
 180 }
 181
 182 void
 183 CanvasNoteEvent::set_selected(bool selected)
 184 {
 185         if (!_note) {
 186                 return;
 187         }
 188
 189         _selected = selected;
 190         set_fill_color (base_color ());
 191
 192         if (_selected) {
 193                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 194
 195                 if(_region.channel_selector_scoped_note() != 0){
 196                     _region.channel_selector_scoped_note()->hide_channel_selector();
 197                     _region.set_channel_selector_scoped_note(0);
 198                 }
 199         } else {
 200                 set_outline_color(calculate_outline(base_color()));
 201                 hide_channel_selector();
 202         }
 203
 204 }
 205
 206 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 207
 208 uint32_t
 209 CanvasNoteEvent::base_color()
 210 {
 211         using namespace ARDOUR;
 212
 213         ColorMode mode = _region.color_mode();
 214
 215         const uint8_t min_opacity = 15;
 216         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 217
 218         switch (mode) {
 219         case TrackColor:
 220         {
 221                 Gdk::Color color = _region.midi_stream_view()->get_region_color();
 222                 return UINT_INTERPOLATE (RGBA_TO_UINT(
 223                                                  SCALE_USHORT_TO_UINT8_T(color.get_red()),
 224                                                  SCALE_USHORT_TO_UINT8_T(color.get_green()),
 225                                                  SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 226                                                  opacity),
 227                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 228         }
 229
 230         case ChannelColors:
 231                 return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (CanvasNoteEvent::midi_channel_colors[_note->channel()],
 232                                                              opacity),
 233                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 234
 235         default:
 236                 return meter_style_fill_color(_note->velocity(), selected());
 237         };
 238
 239         return 0;
 240 }
 241
 242 void
 243 CanvasNoteEvent::set_mouse_fractions (GdkEvent* ev)
 244 {
 245         double ix, iy;
 246         double bx1, bx2, by1, by2;
 247         bool set_cursor = false;
 248
 249         switch (ev->type) {
 250         case GDK_MOTION_NOTIFY:
 251                 ix = ev->motion.x;
 252                 iy = ev->motion.y;
 253                 set_cursor = true;
 254                 break;
 255         case GDK_ENTER_NOTIFY:
 256                 ix = ev->crossing.x;
 257                 iy = ev->crossing.y;
 258                 set_cursor = true;
 259                 break;
 260         case GDK_BUTTON_PRESS:
 261         case GDK_BUTTON_RELEASE:
 262                 ix = ev->button.x;
 263                 iy = ev->button.y;
 264                 break;
 265         default:
 266                 _mouse_x_fraction = -1.0;
 267                 _mouse_y_fraction = -1.0;
 268                 return;
 269         }
 270
 271         _item->get_bounds (bx1, by1, bx2, by2);
 272         _item->w2i (ix, iy);
 273         /* hmm, something wrong here. w2i should give item-local coordinates
 274            but it doesn't. for now, finesse this.
 275         */
 276         ix = ix - bx1;
 277         iy = iy - by1;
 278
 279         /* fraction of width/height */
 280         double xf;
 281         double yf;
 282         bool notify = false;
 283
 284         xf = ix / (bx2 - bx1);
 285         yf = iy / (by2 - by1);
 286
 287         if (xf != _mouse_x_fraction || yf != _mouse_y_fraction) {
 288                 notify = true;
 289         }
 290
 291         _mouse_x_fraction = xf;
 292         _mouse_y_fraction = yf;
 293
 294         if (notify) {
 295                 if (big_enough_to_trim()) {
 296                         _region.note_mouse_position (_mouse_x_fraction, _mouse_y_fraction, set_cursor);
 297                 } else {
 298                         /* pretend the mouse is in the middle, because this is not big enough
 299                            to trim right now.
 300                         */
 301                         _region.note_mouse_position (0.5, 0.5, set_cursor);
 302                 }
 303         }
 304 }
 305
 306 bool
 307 CanvasNoteEvent::on_event(GdkEvent* ev)
 308 {
 309         if (!_region.get_time_axis_view().editor().internal_editing()) {
 310                 return false;
 311         }
 312
 313         switch (ev->type) {
 314         case GDK_ENTER_NOTIFY:
 315                 set_mouse_fractions (ev);
 316                 _region.note_entered (this);
 317                 break;
 318
 319         case GDK_LEAVE_NOTIFY:
 320                 set_mouse_fractions (ev);
 321                 _region.note_left (this);
 322                 break;
 323
 324         case GDK_MOTION_NOTIFY:
 325                 set_mouse_fractions (ev);
 326                 break;
 327
 328         case GDK_BUTTON_PRESS:
 329                 set_mouse_fractions (ev);
 330                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state) && _selected) {
 331                         show_channel_selector();
 332                         return true;
 333                 }
 334                 break;
 335
 336         case GDK_BUTTON_RELEASE:
 337                 set_mouse_fractions (ev);
 338                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
 339                         return true;
 340                 }
 341                 break;
 342
 343         default:
 344                 break;
 345         }
 346
 347         return false;
 348 }
 349
 350 bool
 351 CanvasNoteEvent::mouse_near_ends () const
 352 {
 353         return (_mouse_x_fraction >= 0.0 && _mouse_x_fraction < 0.25) ||
 354                 (_mouse_x_fraction >= 0.75 && _mouse_x_fraction < 1.0);
 355 }
 356
 357 bool
 358 CanvasNoteEvent::big_enough_to_trim () const
 359 {
 360         return (x2() - x1()) > 10; /* canvas units, really pixels */
 361 }
 362
 363 } // namespace Canvas
 364 } // namespace Gnome
 365