gtk2_ardour/canvas-note-event.cc

   1 /*
   2     Copyright (C) 2007 Paul Davis
   3     Author: Dave 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                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 142                 _channel_selector->show_all();
 143                 _channel_selector->channel_selected.connect(
 144                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 145
 146                 _channel_selector->clicked.connect (
 147                         sigc::mem_fun (this, &CanvasNoteEvent::hide_channel_selector));
 148
 149                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 150                                 x1(),
 151                                 y2() + 2,
 152                                 (Gtk::Widget &) *_channel_selector);
 153
 154                 _channel_selector_widget->hide();
 155                 _channel_selector_widget->property_height() = 100;
 156                 _channel_selector_widget->property_width() = 100;
 157                 _channel_selector_widget->raise_to_top();
 158                 _channel_selector_widget->show();
 159         } else {
 160                 hide_channel_selector();
 161         }
 162 }
 163
 164 void
 165 CanvasNoteEvent::hide_channel_selector(void)
 166 {
 167         if (_channel_selector_widget) {
 168                 _channel_selector_widget->hide();
 169                 delete _channel_selector_widget;
 170                 _channel_selector_widget = 0;
 171         }
 172 }
 173
 174 void
 175 CanvasNoteEvent::set_selected(bool selected)
 176 {
 177         if (!_note) {
 178                 return;
 179         }
 180
 181         _selected = selected;
 182         set_fill_color (base_color ());
 183
 184         if (_selected) {
 185                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 186         } else {
 187                 set_outline_color(calculate_outline(base_color()));
 188         }
 189
 190 }
 191
 192 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 193
 194 uint32_t
 195 CanvasNoteEvent::base_color()
 196 {
 197         using namespace ARDOUR;
 198
 199         ColorMode mode = _region.color_mode();
 200
 201         const uint8_t min_opacity = 15;
 202         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 203
 204         switch (mode) {
 205         case TrackColor:
 206                 {
 207                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 208                         return UINT_INTERPOLATE (RGBA_TO_UINT(
 209                                                          SCALE_USHORT_TO_UINT8_T(color.get_red()),
 210                                                          SCALE_USHORT_TO_UINT8_T(color.get_green()),
 211                                                          SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 212                                                          opacity),
 213                                                  ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 214                 }
 215
 216         case ChannelColors:
 217                  return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (CanvasNoteEvent::midi_channel_colors[_note->channel()],
 218                                                               opacity),
 219                                           ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 220
 221         default:
 222                 return meter_style_fill_color(_note->velocity(), selected());
 223         };
 224
 225         return 0;
 226 }
 227
 228 void
 229 CanvasNoteEvent::set_mouse_fractions (GdkEvent* ev)
 230 {
 231         double ix, iy;
 232         double bx1, bx2, by1, by2;
 233         bool set_cursor = false;
 234
 235         switch (ev->type) {
 236         case GDK_MOTION_NOTIFY:
 237                 ix = ev->motion.x;
 238                 iy = ev->motion.y;
 239                 set_cursor = true;
 240                 break;
 241         case GDK_ENTER_NOTIFY:
 242                 ix = ev->crossing.x;
 243                 iy = ev->crossing.y;
 244                 set_cursor = true;
 245                 break;
 246         case GDK_BUTTON_PRESS:
 247         case GDK_BUTTON_RELEASE:
 248                 ix = ev->button.x;
 249                 iy = ev->button.y;
 250                 break;
 251         default:
 252                 _mouse_x_fraction = -1.0;
 253                 _mouse_y_fraction = -1.0;
 254                 return;
 255         }
 256
 257         _item->get_bounds (bx1, by1, bx2, by2);
 258         _item->w2i (ix, iy);
 259         /* hmm, something wrong here. w2i should give item-local coordinates
 260            but it doesn't. for now, finesse this.
 261         */
 262         ix = ix - bx1;
 263         iy = iy - by1;
 264
 265         /* fraction of width/height */
 266         double xf;
 267         double yf;
 268         bool notify = false;
 269
 270         xf = ix / (bx2 - bx1);
 271         yf = iy / (by2 - by1);
 272
 273         if (xf != _mouse_x_fraction || yf != _mouse_y_fraction) {
 274                 notify = true;
 275         }
 276
 277         _mouse_x_fraction = xf;
 278         _mouse_y_fraction = yf;
 279
 280         if (notify) {
 281                 _region.note_mouse_position (_mouse_x_fraction, _mouse_y_fraction, set_cursor);
 282         }
 283 }
 284
 285 bool
 286 CanvasNoteEvent::on_event(GdkEvent* ev)
 287 {
 288         if (!_region.get_time_axis_view().editor().internal_editing()) {
 289                 return false;
 290         }
 291
 292         switch (ev->type) {
 293         case GDK_ENTER_NOTIFY:
 294                 set_mouse_fractions (ev);
 295                 _region.note_entered (this);
 296                 break;
 297
 298         case GDK_LEAVE_NOTIFY:
 299                 set_mouse_fractions (ev);
 300                 _region.note_left (this);
 301                 break;
 302
 303         case GDK_MOTION_NOTIFY:
 304                 set_mouse_fractions (ev);
 305                 break;
 306
 307         case GDK_BUTTON_PRESS:
 308                 set_mouse_fractions (ev);
 309                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
 310                         show_channel_selector();
 311                         return true;
 312                 }
 313                 break;
 314
 315         case GDK_BUTTON_RELEASE:
 316                 set_mouse_fractions (ev);
 317                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
 318                         return true;
 319                 }
 320                 break;
 321
 322         default:
 323                 break;
 324         }
 325
 326         return false;
 327 }
 328
 329 bool
 330 CanvasNoteEvent::mouse_near_ends () const
 331 {
 332         return (_mouse_x_fraction >= 0.0 && _mouse_x_fraction < 0.25) ||
 333                 (_mouse_x_fraction >= 0.75 && _mouse_x_fraction < 1.0);
 334 }
 335
 336 } // namespace Canvas
 337 } // namespace Gnome
 338