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 =
 135                         new Widget(*(_item->property_parent()),
 136                                    x1(),
 137                                    y2() + 2,
 138                                    (Gtk::Widget &) *_channel_selector);
 139
 140                 _channel_selector_widget->hide();
 141                 _channel_selector_widget->property_height() = 100;
 142                 _channel_selector_widget->property_width() = 100;
 143                 _channel_selector_widget->raise_to_top();
 144                 _channel_selector_widget->show();
 145         } else {
 146                 hide_channel_selector();
 147         }
 148 }
 149
 150 void
 151 CanvasNoteEvent::hide_channel_selector(void)
 152 {
 153         if (_channel_selector_widget) {
 154                 _channel_selector_widget->hide();
 155                 delete _channel_selector_widget;
 156                 _channel_selector_widget = 0;
 157         }
 158 }
 159
 160 void
 161 CanvasNoteEvent::selected(bool selected)
 162 {
 163         if (!_note) {
 164                 return;
 165         } else if (selected) {
 166                 set_fill_color(UINT_INTERPOLATE(base_color(),
 167                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5));
 168                 set_outline_color(calculate_outline(
 169                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 170                 show_velocity();
 171         } else {
 172                 set_fill_color(base_color());
 173                 set_outline_color(calculate_outline(base_color()));
 174                 hide_velocity();
 175         }
 176
 177         _selected = selected;
 178 }
 179
 180 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 181
 182 uint32_t
 183 CanvasNoteEvent::base_color()
 184 {
 185         using namespace ARDOUR;
 186
 187         ColorMode mode = _region.color_mode();
 188
 189         const uint8_t minimal_opaqueness = 15;
 190         uint8_t       opaqueness = std::max(minimal_opaqueness, uint8_t(_note->velocity() + _note->velocity()));
 191
 192         switch (mode) {
 193         case TrackColor:
 194                 {
 195                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 196                         return RGBA_TO_UINT(
 197                                         SCALE_USHORT_TO_UINT8_T(color.get_red()),
 198                                         SCALE_USHORT_TO_UINT8_T(color.get_green()),
 199                                         SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 200                                         opaqueness);
 201                 }
 202
 203         case ChannelColors:
 204                 return UINT_RGBA_CHANGE_A(CanvasNoteEvent::midi_channel_colors[_note->channel()],
 205                                                   opaqueness);
 206
 207         default:
 208                 return meter_style_fill_color(_note->velocity());
 209         };
 210
 211         return 0;
 212 }
 213
 214 bool
 215 CanvasNoteEvent::on_event(GdkEvent* ev)
 216 {
 217         MidiStreamView *streamview = _region.midi_stream_view();
 218         static uint8_t drag_delta_note = 0;
 219         static double  drag_delta_x = 0;
 220         static double last_x, last_y;
 221         double event_x, event_y, dx, dy;
 222         bool select_mod;
 223         uint8_t d_velocity = 10;
 224
 225         if (_region.get_time_axis_view().editor().current_mouse_mode() != Editing::MouseNote)
 226                 return false;
 227
 228         switch (ev->type) {
 229         case GDK_SCROLL:
 230                 if (Keyboard::modifier_state_equals (ev->scroll.state, Keyboard::Level4Modifier)) {
 231                         d_velocity = 1;
 232                 }
 233
 234                 if (ev->scroll.direction == GDK_SCROLL_UP) {
 235                         _region.change_velocity(this, d_velocity, true);
 236                         return true;
 237                 } else if (ev->scroll.direction == GDK_SCROLL_DOWN) {
 238                         _region.change_velocity(this, -d_velocity, true);
 239                         return true;
 240                 } else {
 241                         return false;
 242                 }
 243
 244         case GDK_KEY_PRESS:
 245                 if (_note && ev->key.keyval == GDK_Delete) {
 246                         selected(true);
 247                         _region.start_delta_command();
 248                         _region.command_remove_note(this);
 249                 }
 250                 break;
 251
 252         case GDK_KEY_RELEASE:
 253                 if (ev->key.keyval == GDK_Delete) {
 254                         _region.apply_command();
 255                 }
 256                 break;
 257
 258         case GDK_ENTER_NOTIFY:
 259                 _region.note_entered(this);
 260                 _item->grab_focus();
 261                 show_velocity();
 262                 Keyboard::magic_widget_grab_focus();
 263                 break;
 264
 265         case GDK_LEAVE_NOTIFY:
 266                 Keyboard::magic_widget_drop_focus();
 267                 if (! selected()) {
 268                         hide_velocity();
 269                 }
 270                 _region.get_canvas_group()->grab_focus();
 271                 break;
 272
 273         case GDK_BUTTON_PRESS:
 274                 if (ev->button.button == 1) {
 275                         _state = Pressed;
 276                 } else if (ev->button.button == 3) {
 277                         show_channel_selector();
 278                 }
 279                 return true;
 280
 281         case GDK_MOTION_NOTIFY:
 282                 event_x = ev->motion.x;
 283                 event_y = ev->motion.y;
 284
 285                 switch (_state) {
 286                 case Pressed: // Drag begin
 287                         if (_region.midi_view()->editor().current_midi_edit_mode() == Editing::MidiEditSelect
 288                                         && _region.mouse_state() != MidiRegionView::SelectTouchDragging
 289                                         && _region.mouse_state() != MidiRegionView::EraseTouchDragging) {
 290                                 _item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 291                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 292                                 _state = Dragging;
 293                                 _item->property_parent().get_value()->w2i(event_x, event_y);
 294                                 event_x = _region.snap_to_pixel(event_x);
 295                                 last_x = event_x;
 296                                 last_y = event_y;
 297                                 drag_delta_x = 0;
 298                                 drag_delta_note = 0;
 299                                 _region.note_selected(this, true);
 300                         }
 301                         return true;
 302
 303                 case Dragging: // Drag motion
 304                         if (ev->motion.is_hint) {
 305                                 int t_x;
 306                                 int t_y;
 307                                 GdkModifierType state;
 308                                 gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
 309                                 event_x = t_x;
 310                                 event_y = t_y;
 311                         }
 312                         _item->property_parent().get_value()->w2i(event_x, event_y);
 313
 314                         // Snap
 315                         event_x = _region.snap_to_pixel(event_x);
 316
 317                         dx = event_x - last_x;
 318                         dy = event_y - last_y;
 319
 320                         last_x = event_x;
 321
 322                         drag_delta_x += dx;
 323
 324                         // Snap to note rows
 325                         if (abs(dy) < streamview->note_height()) {
 326                                 dy = 0.0;
 327                         } else {
 328                                 int8_t this_delta_note;
 329                                 if (dy > 0) {
 330                                         this_delta_note = (int8_t)ceil(dy / streamview->note_height() / 2.0);
 331                                 } else {
 332                                         this_delta_note = (int8_t)floor(dy / streamview->note_height() / 2.0);
 333                                 }
 334                                 drag_delta_note -= this_delta_note;
 335                                 dy = streamview->note_height() * this_delta_note;
 336                                 last_y = last_y + dy;
 337                         }
 338
 339                         _region.move_selection(dx, dy);
 340
 341                         return true;
 342                 default:
 343                         break;
 344                 }
 345                 break;
 346
 347         case GDK_BUTTON_RELEASE:
 348                 select_mod = (ev->motion.state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK));
 349                 event_x = ev->button.x;
 350                 event_y = ev->button.y;
 351                 _item->property_parent().get_value()->w2i(event_x, event_y);
 352
 353                 if (ev->button.button == 3) {
 354                         return true;
 355                 }
 356
 357                 switch (_state) {
 358                 case Pressed: // Clicked
 359                         if (_region.midi_view()->editor().current_midi_edit_mode() == Editing::MidiEditSelect) {
 360                                 _state = None;
 361
 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                         } else if (_region.midi_view()->editor().current_midi_edit_mode() == Editing::MidiEditErase) {
 369                                 _region.start_delta_command();
 370                                 _region.command_remove_note(this);
 371                                 _region.apply_command();
 372                         }
 373
 374                         return true;
 375                 case Dragging: // Dropped
 376                         _item->ungrab(ev->button.time);
 377                         _state = None;
 378
 379                         if (_note)
 380                                 _region.note_dropped(this,
 381                                                      _region.midi_view()->editor().pixel_to_frame(abs(drag_delta_x))
 382                                                                 * ((drag_delta_x < 0.0) ? -1 : 1),
 383                                                 drag_delta_note);
 384                         return true;
 385                 default:
 386                         break;
 387                 }
 388
 389         default:
 390                 break;
 391         }
 392
 393         return false;
 394 }
 395
 396 } // namespace Canvas
 397 } // namespace Gnome
 398