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 PBD::Signal1<void,CanvasNoteEvent*> CanvasNoteEvent::CanvasNoteEventDeleted;
  34
  35 /// dividing the hue circle in 16 parts, hand adjusted for equal look, courtesy Thorsten Wilms
  36 const uint32_t CanvasNoteEvent::midi_channel_colors[16] = {
  37           0xd32d2dff,  0xd36b2dff,  0xd3972dff,  0xd3d12dff,
  38           0xa0d32dff,  0x7dd32dff,  0x2dd45eff,  0x2dd3c4ff,
  39           0x2da5d3ff,  0x2d6fd3ff,  0x432dd3ff,  0x662dd3ff,
  40           0x832dd3ff,  0xa92dd3ff,  0xd32dbfff,  0xd32d67ff
  41         };
  42
  43 CanvasNoteEvent::CanvasNoteEvent(MidiRegionView& region, Item* item,
  44                 const boost::shared_ptr<NoteType> note)
  45         : _region(region)
  46         , _item(item)
  47         , _text(0)
  48         , _channel_selector_widget()
  49         , _state(None)
  50         , _note(note)
  51         , _selected(false)
  52         , _valid (true)
  53 {
  54 }
  55
  56 CanvasNoteEvent::~CanvasNoteEvent()
  57 {
  58         CanvasNoteEventDeleted (this);
  59
  60         if (_text) {
  61                 _text->hide();
  62                 delete _text;
  63         }
  64
  65         delete _channel_selector_widget;
  66 }
  67
  68 void
  69 CanvasNoteEvent::invalidate ()
  70 {
  71         _valid = false;
  72 }
  73
  74 void
  75 CanvasNoteEvent::validate ()
  76 {
  77         _valid = true;
  78 }
  79
  80 void
  81 CanvasNoteEvent::show_velocity()
  82 {
  83         if (!_text) {
  84                 _text = new InteractiveText(*(_item->property_parent()), this);
  85         }
  86         _text->property_x() = (x1() + x2()) /2;
  87         _text->property_y() = (y1() + y2()) /2;
  88         ostringstream velo(ios::ate);
  89         velo << int(_note->velocity());
  90         _text->property_text() = velo.str();
  91         _text->property_justification() = Gtk::JUSTIFY_CENTER;
  92         _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  93         _text->show();
  94         _text->raise_to_top();
  95 }
  96
  97 void
  98 CanvasNoteEvent::hide_velocity()
  99 {
 100         if (_text) {
 101                 _text->hide();
 102                 delete _text;
 103                 _text = 0;
 104         }
 105 }
 106
 107 void
 108 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 109 {
 110         // make note change its color if its channel is not marked active
 111         if ( (selection & (1 << _note->channel())) == 0 ) {
 112                 set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 113                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 114         } else {
 115                 // set the color according to the notes selection state
 116                 selected(_selected);
 117         }
 118         // this forces the item to update..... maybe slow...
 119         _item->hide();
 120         _item->show();
 121 }
 122
 123 void
 124 CanvasNoteEvent::on_channel_change(uint8_t channel)
 125 {
 126         _region.note_selected(this, true);
 127         hide_channel_selector();
 128         _region.change_channel(channel);
 129 }
 130
 131 void
 132 CanvasNoteEvent::show_channel_selector(void)
 133 {
 134         if (_channel_selector_widget == 0) {
 135                 cerr << "Note has channel: " << int(_note->channel()) << endl;
 136                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 137                 _channel_selector->show_all();
 138                 _channel_selector->channel_selected.connect(
 139                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 140
 141                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 142                                 x1(),
 143                                 y2() + 2,
 144                                 (Gtk::Widget &) *_channel_selector);
 145
 146                 _channel_selector_widget->hide();
 147                 _channel_selector_widget->property_height() = 100;
 148                 _channel_selector_widget->property_width() = 100;
 149                 _channel_selector_widget->raise_to_top();
 150                 _channel_selector_widget->show();
 151         } else {
 152                 hide_channel_selector();
 153         }
 154 }
 155
 156 void
 157 CanvasNoteEvent::hide_channel_selector(void)
 158 {
 159         if (_channel_selector_widget) {
 160                 _channel_selector_widget->hide();
 161                 delete _channel_selector_widget;
 162                 _channel_selector_widget = 0;
 163         }
 164 }
 165
 166 void
 167 CanvasNoteEvent::selected(bool selected)
 168 {
 169         if (!_note) {
 170                 return;
 171         } else if (selected) {
 172                 set_fill_color(UINT_INTERPOLATE(base_color(),
 173                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5));
 174                 set_outline_color(calculate_outline(
 175                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 176         } else {
 177                 set_fill_color(base_color());
 178                 set_outline_color(calculate_outline(base_color()));
 179         }
 180
 181         _selected = selected;
 182 }
 183
 184 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 185
 186 uint32_t
 187 CanvasNoteEvent::base_color()
 188 {
 189         using namespace ARDOUR;
 190
 191         ColorMode mode = _region.color_mode();
 192
 193         const uint8_t min_opacity = 15;
 194         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 195
 196         switch (mode) {
 197         case TrackColor:
 198                 {
 199                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 200                         return RGBA_TO_UINT(
 201                                         SCALE_USHORT_TO_UINT8_T(color.get_red()),
 202                                         SCALE_USHORT_TO_UINT8_T(color.get_green()),
 203                                         SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 204                                         opacity);
 205                 }
 206
 207         case ChannelColors:
 208                 return UINT_RGBA_CHANGE_A(CanvasNoteEvent::midi_channel_colors[_note->channel()],
 209                                                   opacity);
 210
 211         default:
 212                 return meter_style_fill_color(_note->velocity());
 213         };
 214
 215         return 0;
 216 }
 217
 218 bool
 219 CanvasNoteEvent::on_event(GdkEvent* ev)
 220 {
 221         PublicEditor& editor (_region.get_time_axis_view().editor());
 222
 223         if (!editor.internal_editing()) {
 224                 return false;
 225         }
 226
 227         switch (ev->type) {
 228         case GDK_ENTER_NOTIFY:
 229                 _region.note_entered(this);
 230                 //Keyboard::magic_widget_grab_focus();
 231                 break;
 232
 233         case GDK_LEAVE_NOTIFY:
 234                 //Keyboard::magic_widget_drop_focus();
 235                 _region.note_left (this);
 236                 if (!selected()) {
 237                         hide_velocity();
 238                 }
 239                 break;
 240
 241         case GDK_BUTTON_PRESS:
 242                 if (ev->button.button == 3) {
 243                         show_channel_selector();
 244                         return true;
 245                 }
 246                 break;
 247
 248         case GDK_BUTTON_RELEASE:
 249                 if (ev->button.button == 3) {
 250                         return true;
 251                 }
 252                 break;
 253
 254         default:
 255                 break;
 256         }
 257
 258         return false;
 259 }
 260
 261 } // namespace Canvas
 262 } // namespace Gnome
 263