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_channel_selector.h"
  26 #include "midi_region_view.h"
  27 #include "public_editor.h"
  28 #include "editing_syms.h"
  29 #include "keyboard.h"
  30
  31 using namespace std;
  32 using namespace Gtkmm2ext;
  33 using ARDOUR::MidiModel;
  34
  35 namespace Gnome {
  36 namespace Canvas {
  37
  38 PBD::Signal1<void,CanvasNoteEvent*> CanvasNoteEvent::CanvasNoteEventDeleted;
  39
  40 /// dividing the hue circle in 16 parts, hand adjusted for equal look, courtesy Thorsten Wilms
  41 const uint32_t CanvasNoteEvent::midi_channel_colors[16] = {
  42           0xd32d2dff,  0xd36b2dff,  0xd3972dff,  0xd3d12dff,
  43           0xa0d32dff,  0x7dd32dff,  0x2dd45eff,  0x2dd3c4ff,
  44           0x2da5d3ff,  0x2d6fd3ff,  0x432dd3ff,  0x662dd3ff,
  45           0x832dd3ff,  0xa92dd3ff,  0xd32dbfff,  0xd32d67ff
  46         };
  47
  48 CanvasNoteEvent::CanvasNoteEvent(MidiRegionView& region, Item* item, const boost::shared_ptr<NoteType> note)
  49         : _region(region)
  50         , _item(item)
  51         , _text(0)
  52         , _channel_selector_widget()
  53         , _state(None)
  54         , _note(note)
  55         , _selected(false)
  56         , _valid (true)
  57         , _mouse_x_fraction (-1.0)
  58         , _mouse_y_fraction (-1.0)
  59         , _channel_selection (0xffff)
  60 {
  61 }
  62
  63 CanvasNoteEvent::~CanvasNoteEvent()
  64 {
  65         CanvasNoteEventDeleted (this);
  66
  67         if (_text) {
  68                 _text->hide();
  69                 delete _text;
  70         }
  71
  72         delete _channel_selector_widget;
  73 }
  74
  75 void
  76 CanvasNoteEvent::invalidate ()
  77 {
  78         _valid = false;
  79 }
  80
  81 void
  82 CanvasNoteEvent::validate ()
  83 {
  84         _valid = true;
  85 }
  86
  87 void
  88 CanvasNoteEvent::show_velocity()
  89 {
  90         if (!_text) {
  91                 _text = new NoEventText (*(_item->property_parent()));
  92                 _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  93                 _text->property_justification() = Gtk::JUSTIFY_CENTER;
  94         }
  95
  96         _text->property_x() = (x1() + x2()) /2;
  97         _text->property_y() = (y1() + y2()) /2;
  98         ostringstream velo(ios::ate);
  99         velo << int(_note->velocity());
 100         _text->property_text() = velo.str();
 101         _text->show();
 102         _text->raise_to_top();
 103 }
 104
 105 void
 106 CanvasNoteEvent::hide_velocity()
 107 {
 108         if (_text) {
 109                 _text->hide();
 110                 delete _text;
 111                 _text = 0;
 112         }
 113 }
 114
 115 void
 116 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 117 {
 118         _channel_selection = selection;
 119
 120         /* this takes into account whether or not the note should be drawn as inactive */
 121         set_selected (_selected);
 122
 123         // this forces the item to update..... maybe slow...
 124         _item->hide();
 125         _item->show();
 126 }
 127
 128 void
 129 CanvasNoteEvent::on_channel_change(uint8_t channel)
 130 {
 131         _region.note_selected(this, true);
 132         hide_channel_selector();
 133         _region.change_channel(channel);
 134 }
 135
 136 void
 137 CanvasNoteEvent::show_channel_selector(void)
 138 {
 139         if (_channel_selector_widget == 0) {
 140
 141                 if(_region.channel_selector_scoped_note() != 0){
 142                     _region.channel_selector_scoped_note()->hide_channel_selector();
 143                     _region.set_channel_selector_scoped_note(0);
 144                 }
 145
 146                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 147                 _channel_selector->show_all();
 148                 _channel_selector->channel_selected.connect(
 149                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 150
 151                 _channel_selector->clicked.connect (
 152                         sigc::mem_fun (this, &CanvasNoteEvent::hide_channel_selector));
 153
 154                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 155                                                       x1(),
 156                                                       y2() + 2,
 157                                                       (Gtk::Widget &) *_channel_selector);
 158
 159                 _channel_selector_widget->hide();
 160                 _channel_selector_widget->property_height() = 100;
 161                 _channel_selector_widget->property_width() = 100;
 162                 _channel_selector_widget->raise_to_top();
 163                 _channel_selector_widget->show();
 164
 165                 _region.set_channel_selector_scoped_note(this);
 166         } else {
 167                 hide_channel_selector();
 168         }
 169 }
 170
 171 void
 172 CanvasNoteEvent::hide_channel_selector(void)
 173 {
 174         if (_channel_selector_widget) {
 175                 _channel_selector_widget->hide();
 176                 delete _channel_selector_widget;
 177                 _channel_selector_widget = 0;
 178         }
 179 }
 180
 181 void
 182 CanvasNoteEvent::set_selected(bool selected)
 183 {
 184         if (!_note) {
 185                 return;
 186         }
 187
 188         _selected = selected;
 189
 190         bool const active = (_channel_selection & (1 << _note->channel())) != 0;
 191
 192         if (_selected && active) {
 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
 200                 set_fill_color (base_color ());
 201
 202         } else {
 203
 204                 if (active) {
 205                         set_fill_color(base_color());
 206                         set_outline_color(calculate_outline(base_color()));
 207                 } else {
 208                         set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 209                         set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 210                 }
 211
 212                 hide_channel_selector();
 213         }
 214 }
 215
 216 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 217
 218 uint32_t
 219 CanvasNoteEvent::base_color()
 220 {
 221         using namespace ARDOUR;
 222
 223         ColorMode mode = _region.color_mode();
 224
 225         const uint8_t min_opacity = 15;
 226         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 227
 228         switch (mode) {
 229         case TrackColor:
 230         {
 231                 Gdk::Color color = _region.midi_stream_view()->get_region_color();
 232                 return UINT_INTERPOLATE (RGBA_TO_UINT(
 233                                                  SCALE_USHORT_TO_UINT8_T(color.get_red()),
 234                                                  SCALE_USHORT_TO_UINT8_T(color.get_green()),
 235                                                  SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 236                                                  opacity),
 237                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 238         }
 239
 240         case ChannelColors:
 241                 return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (CanvasNoteEvent::midi_channel_colors[_note->channel()],
 242                                                              opacity),
 243                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 244
 245         default:
 246                 return meter_style_fill_color(_note->velocity(), selected());
 247         };
 248
 249         return 0;
 250 }
 251
 252 void
 253 CanvasNoteEvent::set_mouse_fractions (GdkEvent* ev)
 254 {
 255         double ix, iy;
 256         double bx1, bx2, by1, by2;
 257         bool set_cursor = false;
 258
 259         switch (ev->type) {
 260         case GDK_MOTION_NOTIFY:
 261                 ix = ev->motion.x;
 262                 iy = ev->motion.y;
 263                 set_cursor = true;
 264                 break;
 265         case GDK_ENTER_NOTIFY:
 266                 ix = ev->crossing.x;
 267                 iy = ev->crossing.y;
 268                 set_cursor = true;
 269                 break;
 270         case GDK_BUTTON_PRESS:
 271         case GDK_BUTTON_RELEASE:
 272                 ix = ev->button.x;
 273                 iy = ev->button.y;
 274                 break;
 275         default:
 276                 _mouse_x_fraction = -1.0;
 277                 _mouse_y_fraction = -1.0;
 278                 return;
 279         }
 280
 281         _item->get_bounds (bx1, by1, bx2, by2);
 282         _item->w2i (ix, iy);
 283         /* hmm, something wrong here. w2i should give item-local coordinates
 284            but it doesn't. for now, finesse this.
 285         */
 286         ix = ix - bx1;
 287         iy = iy - by1;
 288
 289         /* fraction of width/height */
 290         double xf;
 291         double yf;
 292         bool notify = false;
 293
 294         xf = ix / (bx2 - bx1);
 295         yf = iy / (by2 - by1);
 296
 297         if (xf != _mouse_x_fraction || yf != _mouse_y_fraction) {
 298                 notify = true;
 299         }
 300
 301         _mouse_x_fraction = xf;
 302         _mouse_y_fraction = yf;
 303
 304         if (notify) {
 305                 if (big_enough_to_trim()) {
 306                         _region.note_mouse_position (_mouse_x_fraction, _mouse_y_fraction, set_cursor);
 307                 } else {
 308                         /* pretend the mouse is in the middle, because this is not big enough
 309                            to trim right now.
 310                         */
 311                         _region.note_mouse_position (0.5, 0.5, set_cursor);
 312                 }
 313         }
 314 }
 315
 316 bool
 317 CanvasNoteEvent::on_event(GdkEvent* ev)
 318 {
 319         if (!_region.get_time_axis_view().editor().internal_editing()) {
 320                 return false;
 321         }
 322
 323         switch (ev->type) {
 324         case GDK_ENTER_NOTIFY:
 325                 set_mouse_fractions (ev);
 326                 _region.note_entered (this);
 327                 break;
 328
 329         case GDK_LEAVE_NOTIFY:
 330                 set_mouse_fractions (ev);
 331                 _region.note_left (this);
 332                 break;
 333
 334         case GDK_MOTION_NOTIFY:
 335                 set_mouse_fractions (ev);
 336                 break;
 337
 338         case GDK_BUTTON_PRESS:
 339                 set_mouse_fractions (ev);
 340                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state) && _selected) {
 341                         _region.get_time_axis_view().editor().edit_notes (_region);
 342                         return true;
 343                 }
 344                 break;
 345
 346         case GDK_BUTTON_RELEASE:
 347                 set_mouse_fractions (ev);
 348                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
 349                         return true;
 350                 }
 351                 break;
 352
 353         default:
 354                 break;
 355         }
 356
 357         return false;
 358 }
 359
 360 bool
 361 CanvasNoteEvent::mouse_near_ends () const
 362 {
 363         return (_mouse_x_fraction >= 0.0 && _mouse_x_fraction < 0.25) ||
 364                 (_mouse_x_fraction >= 0.75 && _mouse_x_fraction < 1.0);
 365 }
 366
 367 bool
 368 CanvasNoteEvent::big_enough_to_trim () const
 369 {
 370         return (x2() - x1()) > 20; /* canvas units, really pixels */
 371 }
 372
 373 } // namespace Canvas
 374 } // namespace Gnome
 375