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         if (!_text) {
  78                 _text = new InteractiveText(*(_item->property_parent()), this);
  79         }
  80         _text->property_x() = (x1() + x2()) /2;
  81         _text->property_y() = (y1() + y2()) /2;
  82         ostringstream velo(ios::ate);
  83         velo << int(_note->velocity());
  84         _text->property_text() = velo.str();
  85         _text->property_justification() = Gtk::JUSTIFY_CENTER;
  86         _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  87         _text->show();
  88         _text->raise_to_top();
  89 }
  90
  91 void
  92 CanvasNoteEvent::hide_velocity()
  93 {
  94         if (_text) {
  95                 _text->hide();
  96                 delete _text;
  97                 _text = 0;
  98         }
  99 }
 100
 101 void
 102 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 103 {
 104         // make note change its color if its channel is not marked active
 105         if ( (selection & (1 << _note->channel())) == 0 ) {
 106                 set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 107                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 108         } else {
 109                 // set the color according to the notes selection state
 110                 selected(_selected);
 111         }
 112         // this forces the item to update..... maybe slow...
 113         _item->hide();
 114         _item->show();
 115 }
 116
 117 void
 118 CanvasNoteEvent::on_channel_change(uint8_t channel)
 119 {
 120         _region.note_selected(this, true);
 121         hide_channel_selector();
 122         _region.change_channel(channel);
 123 }
 124
 125 void
 126 CanvasNoteEvent::show_channel_selector(void)
 127 {
 128         if (_channel_selector_widget == 0) {
 129                 cerr << "Note has channel: " << int(_note->channel()) << endl;
 130                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 131                 _channel_selector->show_all();
 132                 _channel_selector->channel_selected.connect(
 133                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 134
 135                 _channel_selector_widget = 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         } else {
 171                 set_fill_color(base_color());
 172                 set_outline_color(calculate_outline(base_color()));
 173         }
 174
 175         _selected = selected;
 176 }
 177
 178 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 179
 180 uint32_t
 181 CanvasNoteEvent::base_color()
 182 {
 183         using namespace ARDOUR;
 184
 185         ColorMode mode = _region.color_mode();
 186
 187         const uint8_t min_opacity = 15;
 188         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 189
 190         switch (mode) {
 191         case TrackColor:
 192                 {
 193                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 194                         return RGBA_TO_UINT(
 195                                         SCALE_USHORT_TO_UINT8_T(color.get_red()),
 196                                         SCALE_USHORT_TO_UINT8_T(color.get_green()),
 197                                         SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 198                                         opacity);
 199                 }
 200
 201         case ChannelColors:
 202                 return UINT_RGBA_CHANGE_A(CanvasNoteEvent::midi_channel_colors[_note->channel()],
 203                                                   opacity);
 204
 205         default:
 206                 return meter_style_fill_color(_note->velocity());
 207         };
 208
 209         return 0;
 210 }
 211
 212 bool
 213 CanvasNoteEvent::on_event(GdkEvent* ev)
 214 {
 215         PublicEditor& editor (_region.get_time_axis_view().editor());
 216
 217         if (!editor.internal_editing()) {
 218                 return false;
 219         }
 220
 221         MidiStreamView *streamview = _region.midi_stream_view();
 222         static uint8_t drag_delta_note = 0;
 223         static double  drag_delta_x = 0;
 224         static double last_x, last_y;
 225         double event_x, event_y, dx, dy;
 226         bool select_mod;
 227
 228         switch (ev->type) {
 229         case GDK_ENTER_NOTIFY:
 230                 _region.note_entered(this);
 231                 //_item->grab_focus();
 232                 //show_velocity();
 233                 //Keyboard::magic_widget_grab_focus();
 234                 break;
 235
 236         case GDK_LEAVE_NOTIFY:
 237                 //Keyboard::magic_widget_drop_focus();
 238                 _region.note_left (this);
 239                 if (!selected()) {
 240                         hide_velocity();
 241                 }
 242                 //_region.get_canvas_group()->grab_focus();
 243                 break;
 244
 245         case GDK_BUTTON_PRESS:
 246                 if (ev->button.button == 1) {
 247                         _state = Pressed;
 248                 } else if (ev->button.button == 3) {
 249                         show_channel_selector();
 250                 }
 251                 return true;
 252
 253         case GDK_MOTION_NOTIFY:
 254                 event_x = ev->motion.x;
 255                 event_y = ev->motion.y;
 256
 257                 switch (_state) {
 258                 case Pressed: // Drag begin
 259                         if (editor.current_mouse_mode() == Editing::MouseObject && _region.mouse_state() != MidiRegionView::SelectTouchDragging) {
 260                                 _item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
 261                                                 Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
 262                                 _state = Dragging;
 263                                 _item->property_parent().get_value()->w2i(event_x, event_y);
 264                                 event_x = _region.snap_to_pixel(event_x);
 265                                 last_x = event_x;
 266                                 last_y = event_y;
 267                                 drag_delta_x = 0;
 268                                 drag_delta_note = 0;
 269                                 _region.note_selected(this, true);
 270                         }
 271                         return true;
 272
 273                 case Dragging: // Drag motion
 274                         if (ev->motion.is_hint) {
 275                                 int t_x;
 276                                 int t_y;
 277                                 GdkModifierType state;
 278                                 gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
 279                                 event_x = t_x;
 280                                 event_y = t_y;
 281                         }
 282                         _item->property_parent().get_value()->w2i(event_x, event_y);
 283
 284                         event_x = _region.snap_to_pixel(event_x);
 285
 286                         dx     = event_x - last_x;
 287                         dy     = event_y - last_y;
 288                         last_x = event_x;
 289
 290                         drag_delta_x += dx;
 291
 292                         // Snap to note rows
 293                         if (abs(dy) < streamview->note_height()) {
 294                                 dy = 0.0;
 295                         } else {
 296                                 int8_t this_delta_note;
 297                                 if (dy > 0) {
 298                                         this_delta_note = (int8_t)ceil(dy / streamview->note_height() / 2.0);
 299                                 } else {
 300                                         this_delta_note = (int8_t)floor(dy / streamview->note_height() / 2.0);
 301                                 }
 302                                 drag_delta_note -= this_delta_note;
 303                                 dy = streamview->note_height() * this_delta_note;
 304                                 last_y = last_y + dy;
 305                         }
 306
 307                         _region.move_selection(dx, dy);
 308
 309                         return true;
 310                 default:
 311                         break;
 312                 }
 313                 break;
 314
 315         case GDK_BUTTON_RELEASE:
 316                 select_mod = (ev->motion.state & (Keyboard::PrimaryModifier | Keyboard::SecondaryModifier));
 317                 event_x = ev->button.x;
 318                 event_y = ev->button.y;
 319                 _item->property_parent().get_value()->w2i(event_x, event_y);
 320
 321                 if (ev->button.button == 3) {
 322                         return true;
 323                 }
 324
 325                 switch (_state) {
 326                 case Pressed: // Clicked
 327                         if (editor.current_mouse_mode() == Editing::MouseRange) {
 328                                 _state = None;
 329                                 if (_selected) {
 330                                         _region.note_deselected(this, select_mod);
 331                                 } else {
 332                                         bool extend = Keyboard::modifier_state_equals (ev->motion.state, Keyboard::TertiaryModifier);
 333                                         bool add = Keyboard::modifier_state_equals (ev->motion.state, Keyboard::PrimaryModifier);
 334
 335                                         if (!extend && !add && _region.selection_size() > 1) {
 336                                                 _region.unique_select(this);
 337                                         } else {
 338                                                 _region.note_selected (this, (extend ? true : add), extend);
 339                                         }
 340                                 }
 341                         }
 342                         return true;
 343
 344                 case Dragging: // Dropped
 345                         _item->ungrab(ev->button.time);
 346                         _state = None;
 347                         if (_note) {
 348                                 _region.note_dropped(this, drag_delta_x, drag_delta_note);
 349                         }
 350                         return true;
 351                 default:
 352                         break;
 353                 }
 354
 355         default:
 356                 break;
 357         }
 358
 359         return false;
 360 }
 361
 362 } // namespace Canvas
 363 } // namespace Gnome
 364