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         , _state(None)
  52         , _note(note)
  53         , _selected(false)
  54         , _valid (true)
  55         , _mouse_x_fraction (-1.0)
  56         , _mouse_y_fraction (-1.0)
  57         , _channel_selection (0xffff)
  58 {
  59 }
  60
  61 CanvasNoteEvent::~CanvasNoteEvent()
  62 {
  63         CanvasNoteEventDeleted (this);
  64
  65         if (_text) {
  66                 _text->hide();
  67                 delete _text;
  68         }
  69 }
  70
  71 void
  72 CanvasNoteEvent::invalidate ()
  73 {
  74         _valid = false;
  75 }
  76
  77 void
  78 CanvasNoteEvent::validate ()
  79 {
  80         _valid = true;
  81 }
  82
  83 void
  84 CanvasNoteEvent::show_velocity()
  85 {
  86         if (!_text) {
  87                 _text = new NoEventText (*(_item->property_parent()));
  88                 _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  89                 _text->property_justification() = Gtk::JUSTIFY_CENTER;
  90         }
  91
  92         _text->property_x() = (x1() + x2()) /2;
  93         _text->property_y() = (y1() + y2()) /2;
  94         ostringstream velo(ios::ate);
  95         velo << int(_note->velocity());
  96         _text->property_text() = velo.str();
  97         _text->show();
  98         _text->raise_to_top();
  99 }
 100
 101 void
 102 CanvasNoteEvent::hide_velocity()
 103 {
 104         if (_text) {
 105                 _text->hide();
 106                 delete _text;
 107                 _text = 0;
 108         }
 109 }
 110
 111 void
 112 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 113 {
 114         _channel_selection = selection;
 115
 116         /* this takes into account whether or not the note should be drawn as inactive */
 117         set_selected (_selected);
 118
 119         // this forces the item to update..... maybe slow...
 120         _item->hide();
 121         _item->show();
 122 }
 123
 124 void
 125 CanvasNoteEvent::on_channel_change(uint8_t channel)
 126 {
 127         _region.note_selected(this, true);
 128         _region.change_channel(channel);
 129 }
 130
 131 void
 132 CanvasNoteEvent::set_selected(bool selected)
 133 {
 134         if (!_note) {
 135                 return;
 136         }
 137
 138         _selected = selected;
 139
 140         bool const active = (_channel_selection & (1 << _note->channel())) != 0;
 141
 142         if (_selected && active) {
 143                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 144                 set_fill_color (base_color ());
 145
 146         } else {
 147
 148                 if (active) {
 149                         set_fill_color(base_color());
 150                         set_outline_color(calculate_outline(base_color()));
 151                 } else {
 152                         set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 153                         set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 154                 }
 155         }
 156 }
 157
 158 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 159
 160 uint32_t
 161 CanvasNoteEvent::base_color()
 162 {
 163         using namespace ARDOUR;
 164
 165         ColorMode mode = _region.color_mode();
 166
 167         const uint8_t min_opacity = 15;
 168         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 169
 170         switch (mode) {
 171         case TrackColor:
 172         {
 173                 Gdk::Color color = _region.midi_stream_view()->get_region_color();
 174                 return UINT_INTERPOLATE (RGBA_TO_UINT(
 175                                                  SCALE_USHORT_TO_UINT8_T(color.get_red()),
 176                                                  SCALE_USHORT_TO_UINT8_T(color.get_green()),
 177                                                  SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 178                                                  opacity),
 179                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 180         }
 181
 182         case ChannelColors:
 183                 return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (CanvasNoteEvent::midi_channel_colors[_note->channel()],
 184                                                              opacity),
 185                                          ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
 186
 187         default:
 188                 return meter_style_fill_color(_note->velocity(), selected());
 189         };
 190
 191         return 0;
 192 }
 193
 194 void
 195 CanvasNoteEvent::set_mouse_fractions (GdkEvent* ev)
 196 {
 197         double ix, iy;
 198         double bx1, bx2, by1, by2;
 199         bool set_cursor = false;
 200
 201         switch (ev->type) {
 202         case GDK_MOTION_NOTIFY:
 203                 ix = ev->motion.x;
 204                 iy = ev->motion.y;
 205                 set_cursor = true;
 206                 break;
 207         case GDK_ENTER_NOTIFY:
 208                 ix = ev->crossing.x;
 209                 iy = ev->crossing.y;
 210                 set_cursor = true;
 211                 break;
 212         case GDK_BUTTON_PRESS:
 213         case GDK_BUTTON_RELEASE:
 214                 ix = ev->button.x;
 215                 iy = ev->button.y;
 216                 break;
 217         default:
 218                 _mouse_x_fraction = -1.0;
 219                 _mouse_y_fraction = -1.0;
 220                 return;
 221         }
 222
 223         _item->get_bounds (bx1, by1, bx2, by2);
 224         _item->w2i (ix, iy);
 225         /* hmm, something wrong here. w2i should give item-local coordinates
 226            but it doesn't. for now, finesse this.
 227         */
 228         ix = ix - bx1;
 229         iy = iy - by1;
 230
 231         /* fraction of width/height */
 232         double xf;
 233         double yf;
 234         bool notify = false;
 235
 236         xf = ix / (bx2 - bx1);
 237         yf = iy / (by2 - by1);
 238
 239         if (xf != _mouse_x_fraction || yf != _mouse_y_fraction) {
 240                 notify = true;
 241         }
 242
 243         _mouse_x_fraction = xf;
 244         _mouse_y_fraction = yf;
 245
 246         if (notify) {
 247                 if (big_enough_to_trim()) {
 248                         _region.note_mouse_position (_mouse_x_fraction, _mouse_y_fraction, set_cursor);
 249                 } else {
 250                         /* pretend the mouse is in the middle, because this is not big enough
 251                            to trim right now.
 252                         */
 253                         _region.note_mouse_position (0.5, 0.5, set_cursor);
 254                 }
 255         }
 256 }
 257
 258 bool
 259 CanvasNoteEvent::on_event(GdkEvent* ev)
 260 {
 261         if (!_region.get_time_axis_view().editor().internal_editing()) {
 262                 return false;
 263         }
 264
 265         switch (ev->type) {
 266         case GDK_ENTER_NOTIFY:
 267                 set_mouse_fractions (ev);
 268                 _region.note_entered (this);
 269                 break;
 270
 271         case GDK_LEAVE_NOTIFY:
 272                 set_mouse_fractions (ev);
 273                 _region.note_left (this);
 274                 break;
 275
 276         case GDK_MOTION_NOTIFY:
 277                 set_mouse_fractions (ev);
 278                 break;
 279
 280         case GDK_BUTTON_PRESS:
 281                 set_mouse_fractions (ev);
 282                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state) && _selected) {
 283                         _region.get_time_axis_view().editor().edit_notes (_region);
 284                         return true;
 285                 }
 286                 break;
 287
 288         case GDK_BUTTON_RELEASE:
 289                 set_mouse_fractions (ev);
 290                 if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
 291                         return true;
 292                 }
 293                 break;
 294
 295         default:
 296                 break;
 297         }
 298
 299         return false;
 300 }
 301
 302 bool
 303 CanvasNoteEvent::mouse_near_ends () const
 304 {
 305         return (_mouse_x_fraction >= 0.0 && _mouse_x_fraction < 0.25) ||
 306                 (_mouse_x_fraction >= 0.75 && _mouse_x_fraction < 1.0);
 307 }
 308
 309 bool
 310 CanvasNoteEvent::big_enough_to_trim () const
 311 {
 312         return (x2() - x1()) > 20; /* canvas units, really pixels */
 313 }
 314
 315 } // namespace Canvas
 316 } // namespace Gnome
 317