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 #include "canvas-note-event.h"
  22 #include "midi_region_view.h"
  23 #include "public_editor.h"
  24 #include "editing_syms.h"
  25 #include "keyboard.h"
  26
  27 using namespace std;
  28 using ARDOUR::MidiModel;
  29
  30 namespace Gnome {
  31 namespace Canvas {
  32
  33 /// dividing the hue circle in 16 parts, hand adjusted for equal look, courtesy Thorsten Wilms
  34 const uint32_t CanvasNoteEvent::midi_channel_colors[16] = {
  35           0xd32d2dff,  0xd36b2dff,  0xd3972dff,  0xd3d12dff,
  36           0xa0d32dff,  0x7dd32dff,  0x2dd45eff,  0x2dd3c4ff,
  37           0x2da5d3ff,  0x2d6fd3ff,  0x432dd3ff,  0x662dd3ff,
  38           0x832dd3ff,  0xa92dd3ff,  0xd32dbfff,  0xd32d67ff
  39         };
  40
  41 CanvasNoteEvent::CanvasNoteEvent(MidiRegionView& region, Item* item,
  42                 const boost::shared_ptr<NoteType> note)
  43         : _region(region)
  44         , _item(item)
  45         , _text(0)
  46         , _channel_selector_widget()
  47         , _state(None)
  48         , _note(note)
  49         , _selected(false)
  50 {
  51 }
  52
  53 CanvasNoteEvent::~CanvasNoteEvent()
  54 {
  55         if (_text) {
  56                 _text->hide();
  57                 delete _text;
  58         }
  59
  60         delete _channel_selector_widget;
  61 }
  62
  63 void
  64 CanvasNoteEvent::move_event(double dx, double dy)
  65 {
  66         _item->move(dx, dy);
  67         if (_text) {
  68                 _text->hide();
  69                 _text->move(dx, dy);
  70                 _text->show();
  71         }
  72 }
  73
  74 void
  75 CanvasNoteEvent::show_velocity()
  76 {
  77         hide_velocity();
  78         _text = new InteractiveText(*(_item->property_parent()), this);
  79         _text->property_x() = (x1() + x2()) /2;
  80         _text->property_y() = (y1() + y2()) /2;
  81         ostringstream velo(ios::ate);
  82         velo << int(_note->velocity());
  83         _text->property_text() = velo.str();
  84         _text->property_justification() = Gtk::JUSTIFY_CENTER;
  85         _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  86         _text->show();
  87         _text->raise_to_top();
  88 }
  89
  90 void
  91 CanvasNoteEvent::hide_velocity()
  92 {
  93         if (_text) {
  94                 _text->hide();
  95                 delete _text;
  96         }
  97         _text = 0;
  98 }
  99
 100 void
 101 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 102 {
 103         // make note change its color if its channel is not marked active
 104         if ( (selection & (1 << _note->channel())) == 0 ) {
 105                 set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 106                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 107         } else {
 108                 // set the color according to the notes selection state
 109                 selected(_selected);
 110         }
 111         // this forces the item to update..... maybe slow...
 112         _item->hide();
 113         _item->show();
 114 }
 115
 116 void
 117 CanvasNoteEvent::on_channel_change(uint8_t channel)
 118 {
 119         _region.note_selected(this, true);
 120         hide_channel_selector();
 121         _region.change_channel(channel);
 122 }
 123
 124 void
 125 CanvasNoteEvent::show_channel_selector(void)
 126 {
 127         if (_channel_selector_widget == 0) {
 128                 cerr << "Note has channel: " << int(_note->channel()) << endl;
 129                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 130                 _channel_selector->show_all();
 131                 _channel_selector->channel_selected.connect(
 132                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 133
 134                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 135                                 x1(),
 136                                 y2() + 2,
 137                                 (Gtk::Widget &) *_channel_selector);
 138
 139                 _channel_selector_widget->hide();
 140                 _channel_selector_widget->property_height() = 100;
 141                 _channel_selector_widget->property_width() = 100;
 142                 _channel_selector_widget->raise_to_top();
 143                 _channel_selector_widget->show();
 144         } else {
 145                 hide_channel_selector();
 146         }
 147 }
 148
 149 void
 150 CanvasNoteEvent::hide_channel_selector(void)
 151 {
 152         if (_channel_selector_widget) {
 153                 _channel_selector_widget->hide();
 154                 delete _channel_selector_widget;
 155                 _channel_selector_widget = 0;
 156         }
 157 }
 158
 159 void
 160 CanvasNoteEvent::selected(bool selected)
 161 {
 162         if (!_note) {
 163                 return;
 164         } else if (selected) {
 165                 set_fill_color(UINT_INTERPOLATE(base_color(),
 166                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5));
 167                 set_outline_color(calculate_outline(
 168                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 169                 show_velocity();
 170         } else {
 171                 set_fill_color(base_color());
 172                 set_outline_color(calculate_outline(base_color()));
 173                 hide_velocity();
 174         }
 175
 176         _selected = selected;
 177 }
 178
 179 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 180
 181 uint32_t
 182 CanvasNoteEvent::base_color()
 183 {
 184         using namespace ARDOUR;
 185
 186         ColorMode mode = _region.color_mode();
 187
 188         const uint8_t min_opacity = 15;
 189         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 190
 191         switch (mode) {
 192         case TrackColor:
 193                 {
 194                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 195                         return RGBA_TO_UINT(
 196                                         SCALE_USHORT_TO_UINT8_T(color.get_red()),
 197                                         SCALE_USHORT_TO_UINT8_T(color.get_green()),
 198                                         SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 199                                         opacity);
 200                 }
 201
 202         case ChannelColors:
 203                 return UINT_RGBA_CHANGE_A(CanvasNoteEvent::midi_channel_colors[_note->channel()],
 204                                                   opacity);
 205
 206         default:
 207                 return meter_style_fill_color(_note->velocity());
 208         };
 209
 210         return 0;
 211 }
 212
 213 bool
 214 CanvasNoteEvent::on_event(GdkEvent* ev)
 215 {
 216         MidiStreamView *streamview = _region.midi_stream_view();
 217         static uint8_t drag_delta_note = 0;
 218         static double  drag_delta_x = 0;
 219         static double last_x, last_y;
 220         double event_x, event_y, dx, dy;
 221         bool select_mod;
 222         uint8_t d_velocity = 10;
 223
 224         if (_region.get_time_axis_view().editor().current_mouse_mode() != Editing::MouseNote) {
 225                 return false;
 226         }
 227
 228         const Editing::MidiEditMode midi_edit_mode
 229                         = _region.midi_view()->editor().current_midi_edit_mode();
 230
 231         switch (ev->type) {
 232         case GDK_SCROLL:
 233                 if (Keyboard::modifier_state_equals (ev->scroll.state, Keyboard::Level4Modifier)) {
 234                         d_velocity = 1;
 235                 }
 236
 237                 if (ev->scroll.direction == GDK_SCROLL_UP) {
 238                         _region.change_velocity(this, d_velocity, true);
 239                         return true;
 240                 } else if (ev->scroll.direction == GDK_SCROLL_DOWN) {
 241                         _region.change_velocity(this, -d_velocity, true);
 242                         return true;
 243                 } else {
 244                         return false;
 245                 }
 246
 247         case GDK_KEY_PRESS:
 248                 if (_note && ev->key.keyval == GDK_Delete) {
 249                         selected(true);
 250                         _region.start_delta_command();
 251                         _region.command_remove_note(this);
 252                 }
 253                 break;
 254
 255         case GDK_KEY_RELEASE:
 256                 if (ev->key.keyval == GDK_Delete) {
 257                         _region.apply_command();
 258                 }
 259                 break;
 260
 261         case GDK_ENTER_NOTIFY:
 262                 _region.note_entered(this);
 263                 _item->grab_focus();
 264                 show_velocity();
 265                 Keyboard::magic_widget_grab_focus();
 266                 break;
 267
 268         case GDK_LEAVE_NOTIFY:
 269                 Keyboard::magic_widget_drop_focus();
 270                 if (! selected()) {
 271                         hide_velocity();
 272                 }
 273                 _region.get_canvas_group()->grab_focus();
 274                 break;
 275
 276         case GDK_BUTTON_PRESS:
 277                 if (ev->button.button == 1) {
 278                         _state = Pressed;
 279                 } else if (ev->button.button == 3) {
 280                         show_channel_selector();
 281                 }
 282                 return true;
 283
 284         case GDK_MOTION_NOTIFY:
 285                 event_x = ev->motion.x;
 286                 event_y = ev->motion.y;
 287
 288                 switch (_state) {
 289                 case Pressed: // Drag begin
 290                         if (midi_edit_mode == Editing::MidiEditSelect
 291                                         && _region.mouse_state() != MidiRegionView::SelectTouchDragging
 292                                         && _region.mouse_state() != MidiRegionView::EraseTouchDragging) {
 293                                 _item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 294                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 295                                 _state = Dragging;
 296                                 _item->property_parent().get_value()->w2i(event_x, event_y);
 297                                 event_x = _region.snap_to_pixel(event_x);
 298                                 last_x = event_x;
 299                                 last_y = event_y;
 300                                 drag_delta_x = 0;
 301                                 drag_delta_note = 0;
 302                                 _region.note_selected(this, true);
 303                         }
 304                         return true;
 305
 306                 case Dragging: // Drag motion
 307                         if (ev->motion.is_hint) {
 308                                 int t_x;
 309                                 int t_y;
 310                                 GdkModifierType state;
 311                                 gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
 312                                 event_x = t_x;
 313                                 event_y = t_y;
 314                         }
 315                         _item->property_parent().get_value()->w2i(event_x, event_y);
 316
 317                         event_x = _region.snap_to_pixel(event_x);
 318
 319                         dx     = event_x - last_x;
 320                         dy     = event_y - last_y;
 321                         last_x = event_x;
 322
 323                         drag_delta_x += dx;
 324
 325                         // Snap to note rows
 326                         if (abs(dy) < streamview->note_height()) {
 327                                 dy = 0.0;
 328                         } else {
 329                                 int8_t this_delta_note;
 330                                 if (dy > 0) {
 331                                         this_delta_note = (int8_t)ceil(dy / streamview->note_height() / 2.0);
 332                                 } else {
 333                                         this_delta_note = (int8_t)floor(dy / streamview->note_height() / 2.0);
 334                                 }
 335                                 drag_delta_note -= this_delta_note;
 336                                 dy = streamview->note_height() * this_delta_note;
 337                                 last_y = last_y + dy;
 338                         }
 339
 340                         _region.move_selection(dx, dy);
 341
 342                         return true;
 343                 default:
 344                         break;
 345                 }
 346                 break;
 347
 348         case GDK_BUTTON_RELEASE:
 349                 select_mod = (ev->motion.state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK));
 350                 event_x = ev->button.x;
 351                 event_y = ev->button.y;
 352                 _item->property_parent().get_value()->w2i(event_x, event_y);
 353
 354                 if (ev->button.button == 3) {
 355                         return true;
 356                 }
 357
 358                 switch (_state) {
 359                 case Pressed: // Clicked
 360                         if (midi_edit_mode == Editing::MidiEditSelect) {
 361                                 _state = None;
 362                                 if (_selected && !select_mod && _region.selection_size() > 1) {
 363                                         _region.unique_select(this);
 364                                 } else if (_selected) {
 365                                         _region.note_deselected(this, select_mod);
 366                                 } else {
 367                                         _region.note_selected(this, select_mod);
 368                                 }
 369                         } else if (midi_edit_mode == Editing::MidiEditErase) {
 370                                 _region.start_delta_command();
 371                                 _region.command_remove_note(this);
 372                                 _region.apply_command();
 373                         }
 374
 375                         return true;
 376                 case Dragging: // Dropped
 377                         _item->ungrab(ev->button.time);
 378                         _state = None;
 379                         if (_note) {
 380                                 _region.note_dropped(this, drag_delta_x, drag_delta_note);
 381                         }
 382                         return true;
 383                 default:
 384                         break;
 385                 }
 386
 387         default:
 388                 break;
 389         }
 390
 391         return false;
 392 }
 393
 394 } // namespace Canvas
 395 } // namespace Gnome
 396