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         , _channel_selection (0xffff)
  59 {
  60 }
  61
  62 CanvasNoteEvent::~CanvasNoteEvent()
  63 {
  64         CanvasNoteEventDeleted (this);
  65
  66         if (_text) {
  67                 _text->hide();
  68                 delete _text;
  69         }
  70
  71         delete _channel_selector_widget;
  72 }
  73
  74 void
  75 CanvasNoteEvent::invalidate ()
  76 {
  77         _valid = false;
  78 }
  79
  80 void
  81 CanvasNoteEvent::validate ()
  82 {
  83         _valid = true;
  84 }
  85
  86 void
  87 CanvasNoteEvent::show_velocity()
  88 {
  89         if (!_text) {
  90                 _text = new NoEventText (*(_item->property_parent()));
  91                 _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  92                 _text->property_justification() = Gtk::JUSTIFY_CENTER;
  93         }
  94
  95         _text->property_x() = (x1() + x2()) /2;
  96         _text->property_y() = (y1() + y2()) /2;
  97         ostringstream velo(ios::ate);
  98         velo << int(_note->velocity());
  99         _text->property_text() = velo.str();
 100         _text->show();
 101         _text->raise_to_top();
 102 }
 103
 104 void
 105 CanvasNoteEvent::hide_velocity()
 106 {
 107         if (_text) {
 108                 _text->hide();
 109                 delete _text;
 110                 _text = 0;
 111         }
 112 }
 113
 114 void
 115 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 116 {
 117         _channel_selection = selection;
 118
 119         /* this takes into account whether or not the note should be drawn as inactive */
 120         set_selected (_selected);
 121
 122         // this forces the item to update..... maybe slow...
 123         _item->hide();
 124         _item->show();
 125 }
 126
 127 void
 128 CanvasNoteEvent::on_channel_change(uint8_t channel)
 129 {
 130         _region.note_selected(this, true);
 131         hide_channel_selector();
 132         _region.change_channel(channel);
 133 }
 134
 135 void
 136 CanvasNoteEvent::show_channel_selector(void)
 137 {
 138         if (_channel_selector_widget == 0) {
 139
 140                 if(_region.channel_selector_scoped_note() != 0){
 141                     _region.channel_selector_scoped_note()->hide_channel_selector();
 142                     _region.set_channel_selector_scoped_note(0);
 143                 }
 144
 145                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 146                 _channel_selector->show_all();
 147                 _channel_selector->channel_selected.connect(
 148                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 149
 150                 _channel_selector->clicked.connect (
 151                         sigc::mem_fun (this, &CanvasNoteEvent::hide_channel_selector));
 152
 153                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 154                                                       x1(),
 155                                                       y2() + 2,
 156                                                       (Gtk::Widget &) *_channel_selector);
 157
 158                 _channel_selector_widget->hide();
 159                 _channel_selector_widget->property_height() = 100;
 160                 _channel_selector_widget->property_width() = 100;
 161                 _channel_selector_widget->raise_to_top();
 162                 _channel_selector_widget->show();
 163
 164                 _region.set_channel_selector_scoped_note(this);
 165         } else {
 166                 hide_channel_selector();
 167         }
 168 }
 169
 170 void
 171 CanvasNoteEvent::hide_channel_selector(void)
 172 {
 173         if (_channel_selector_widget) {
 174                 _channel_selector_widget->hide();
 175                 delete _channel_selector_widget;
 176                 _channel_selector_widget = 0;
 177         }
 178 }
 179
 180 void
 181 CanvasNoteEvent::set_selected(bool selected)
 182 {
 183         if (!_note) {
 184                 return;
 185         }
 186
 187         _selected = selected;
 188
 189         bool const active = (_channel_selection & (1 << _note->channel())) != 0;
 190
 191         if (_selected && active) {
 192                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 193
 194                 if(_region.channel_selector_scoped_note() != 0){
 195                     _region.channel_selector_scoped_note()->hide_channel_selector();
 196                     _region.set_channel_selector_scoped_note(0);
 197                 }
 198
 199                 set_fill_color (base_color ());
 200
 201         } else {
 202
 203                 if (active) {
 204                         set_fill_color(base_color());
 205                         set_outline_color(calculate_outline(base_color()));
 206                 } else {
 207                         set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 208                         set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 209                 }
 210
 211                 hide_channel_selector();
 212         }
 213 }
 214
 215 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 216
 217 uint32_t
 218 CanvasNoteEvent::base_color()
 219 {
 220         using namespace ARDOUR;
 221
 222         ColorMode mode = _region.color_mode();
 223
 224         const uint8_t min_opacity = 15;
 225         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 226
 227         switch (mode) {
 228         case TrackColor:
 229         {
 230                 Gdk::Color color = _region.midi_stream_view()->get_region_color();
 231                 return UINT_INTERPOLATE (RGBA_TO_UINT(
 232                                                  SCALE_USHORT_TO_UINT8_T(color.get_red()),
 233                                                  SCALE_USHORT_TO_UINT8_T(color.get_green()),
 234                                                  SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 235                                                  opacity),
 236                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 237         }
 238
 239         case ChannelColors:
 240                 return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (CanvasNoteEvent::midi_channel_colors[_note->channel()],
 241                                                              opacity),
 242                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 243
 244         default:
 245                 return meter_style_fill_color(_note->velocity(), selected());
 246         };
 247
 248         return 0;
 249 }
 250
 251 void
 252 CanvasNoteEvent::set_mouse_fractions (GdkEvent* ev)
 253 {
 254         double ix, iy;
 255         double bx1, bx2, by1, by2;
 256         bool set_cursor = false;
 257
 258         switch (ev->type) {
 259         case GDK_MOTION_NOTIFY:
 260                 ix = ev->motion.x;
 261                 iy = ev->motion.y;
 262                 set_cursor = true;
 263                 break;
 264         case GDK_ENTER_NOTIFY:
 265                 ix = ev->crossing.x;
 266                 iy = ev->crossing.y;
 267                 set_cursor = true;
 268                 break;
 269         case GDK_BUTTON_PRESS:
 270         case GDK_BUTTON_RELEASE:
 271                 ix = ev->button.x;
 272                 iy = ev->button.y;
 273                 break;
 274         default:
 275                 _mouse_x_fraction = -1.0;
 276                 _mouse_y_fraction = -1.0;
 277                 return;
 278         }
 279
 280         _item->get_bounds (bx1, by1, bx2, by2);
 281         _item->w2i (ix, iy);
 282         /* hmm, something wrong here. w2i should give item-local coordinates
 283            but it doesn't. for now, finesse this.
 284         */
 285         ix = ix - bx1;
 286         iy = iy - by1;
 287
 288         /* fraction of width/height */
 289         double xf;
 290         double yf;
 291         bool notify = false;
 292
 293         xf = ix / (bx2 - bx1);
 294         yf = iy / (by2 - by1);
 295
 296         if (xf != _mouse_x_fraction || yf != _mouse_y_fraction) {
 297                 notify = true;
 298         }
 299
 300         _mouse_x_fraction = xf;
 301         _mouse_y_fraction = yf;
 302
 303         if (notify) {
 304                 if (big_enough_to_trim()) {
 305                         _region.note_mouse_position (_mouse_x_fraction, _mouse_y_fraction, set_cursor);
 306                 } else {
 307                         /* pretend the mouse is in the middle, because this is not big enough
 308                            to trim right now.
 309                         */
 310                         _region.note_mouse_position (0.5, 0.5, set_cursor);
 311                 }
 312         }
 313 }
 314
 315 bool
 316 CanvasNoteEvent::on_event(GdkEvent* ev)
 317 {
 318         if (!_region.get_time_axis_view().editor().internal_editing()) {
 319                 return false;
 320         }
 321
 322         switch (ev->type) {
 323         case GDK_ENTER_NOTIFY:
 324                 set_mouse_fractions (ev);
 325                 _region.note_entered (this);
 326                 break;
 327
 328         case GDK_LEAVE_NOTIFY:
 329                 set_mouse_fractions (ev);
 330                 _region.note_left (this);
 331                 break;
 332
 333         case GDK_MOTION_NOTIFY:
 334                 set_mouse_fractions (ev);
 335                 break;
 336
 337         case GDK_BUTTON_PRESS:
 338                 set_mouse_fractions (ev);
 339                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state) && _selected) {
 340                         show_channel_selector();
 341                         return true;
 342                 }
 343                 break;
 344
 345         case GDK_BUTTON_RELEASE:
 346                 set_mouse_fractions (ev);
 347                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
 348                         return true;
 349                 }
 350                 break;
 351
 352         default:
 353                 break;
 354         }
 355
 356         return false;
 357 }
 358
 359 bool
 360 CanvasNoteEvent::mouse_near_ends () const
 361 {
 362         return (_mouse_x_fraction >= 0.0 && _mouse_x_fraction < 0.25) ||
 363                 (_mouse_x_fraction >= 0.75 && _mouse_x_fraction < 1.0);
 364 }
 365
 366 bool
 367 CanvasNoteEvent::big_enough_to_trim () const
 368 {
 369         return (x2() - x1()) > 20; /* canvas units, really pixels */
 370 }
 371
 372 } // namespace Canvas
 373 } // namespace Gnome
 374