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         , _valid (true)
  51 {
  52 }
  53
  54 CanvasNoteEvent::~CanvasNoteEvent()
  55 {
  56         cerr << "Destroying CNE @ " << this << endl;
  57
  58         if (_text) {
  59                 _text->hide();
  60                 delete _text;
  61         }
  62
  63         delete _channel_selector_widget;
  64 }
  65
  66 void
  67 CanvasNoteEvent::invalidate ()
  68 {
  69         _valid = false;
  70 }
  71
  72 void
  73 CanvasNoteEvent::validate ()
  74 {
  75         _valid = true;
  76 }
  77
  78 void
  79 CanvasNoteEvent::show_velocity()
  80 {
  81         if (!_text) {
  82                 _text = new InteractiveText(*(_item->property_parent()), this);
  83         }
  84         _text->property_x() = (x1() + x2()) /2;
  85         _text->property_y() = (y1() + y2()) /2;
  86         ostringstream velo(ios::ate);
  87         velo << int(_note->velocity());
  88         _text->property_text() = velo.str();
  89         _text->property_justification() = Gtk::JUSTIFY_CENTER;
  90         _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
  91         _text->show();
  92         _text->raise_to_top();
  93 }
  94
  95 void
  96 CanvasNoteEvent::hide_velocity()
  97 {
  98         if (_text) {
  99                 _text->hide();
 100                 delete _text;
 101                 _text = 0;
 102         }
 103 }
 104
 105 void
 106 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 107 {
 108         // make note change its color if its channel is not marked active
 109         if ( (selection & (1 << _note->channel())) == 0 ) {
 110                 set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 111                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 112         } else {
 113                 // set the color according to the notes selection state
 114                 selected(_selected);
 115         }
 116         // this forces the item to update..... maybe slow...
 117         _item->hide();
 118         _item->show();
 119 }
 120
 121 void
 122 CanvasNoteEvent::on_channel_change(uint8_t channel)
 123 {
 124         _region.note_selected(this, true);
 125         hide_channel_selector();
 126         _region.change_channel(channel);
 127 }
 128
 129 void
 130 CanvasNoteEvent::show_channel_selector(void)
 131 {
 132         if (_channel_selector_widget == 0) {
 133                 cerr << "Note has channel: " << int(_note->channel()) << endl;
 134                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 135                 _channel_selector->show_all();
 136                 _channel_selector->channel_selected.connect(
 137                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 138
 139                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 140                                 x1(),
 141                                 y2() + 2,
 142                                 (Gtk::Widget &) *_channel_selector);
 143
 144                 _channel_selector_widget->hide();
 145                 _channel_selector_widget->property_height() = 100;
 146                 _channel_selector_widget->property_width() = 100;
 147                 _channel_selector_widget->raise_to_top();
 148                 _channel_selector_widget->show();
 149         } else {
 150                 hide_channel_selector();
 151         }
 152 }
 153
 154 void
 155 CanvasNoteEvent::hide_channel_selector(void)
 156 {
 157         if (_channel_selector_widget) {
 158                 _channel_selector_widget->hide();
 159                 delete _channel_selector_widget;
 160                 _channel_selector_widget = 0;
 161         }
 162 }
 163
 164 void
 165 CanvasNoteEvent::selected(bool selected)
 166 {
 167         if (!_note) {
 168                 return;
 169         } else if (selected) {
 170                 set_fill_color(UINT_INTERPOLATE(base_color(),
 171                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5));
 172                 set_outline_color(calculate_outline(
 173                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 174         } else {
 175                 set_fill_color(base_color());
 176                 set_outline_color(calculate_outline(base_color()));
 177         }
 178
 179         _selected = selected;
 180 }
 181
 182 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 183
 184 uint32_t
 185 CanvasNoteEvent::base_color()
 186 {
 187         using namespace ARDOUR;
 188
 189         ColorMode mode = _region.color_mode();
 190
 191         const uint8_t min_opacity = 15;
 192         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 193
 194         switch (mode) {
 195         case TrackColor:
 196                 {
 197                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 198                         return RGBA_TO_UINT(
 199                                         SCALE_USHORT_TO_UINT8_T(color.get_red()),
 200                                         SCALE_USHORT_TO_UINT8_T(color.get_green()),
 201                                         SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 202                                         opacity);
 203                 }
 204
 205         case ChannelColors:
 206                 return UINT_RGBA_CHANGE_A(CanvasNoteEvent::midi_channel_colors[_note->channel()],
 207                                                   opacity);
 208
 209         default:
 210                 return meter_style_fill_color(_note->velocity());
 211         };
 212
 213         return 0;
 214 }
 215
 216 bool
 217 CanvasNoteEvent::on_event(GdkEvent* ev)
 218 {
 219         PublicEditor& editor (_region.get_time_axis_view().editor());
 220
 221         if (!editor.internal_editing()) {
 222                 return false;
 223         }
 224
 225         switch (ev->type) {
 226         case GDK_ENTER_NOTIFY:
 227                 _region.note_entered(this);
 228                 //Keyboard::magic_widget_grab_focus();
 229                 break;
 230
 231         case GDK_LEAVE_NOTIFY:
 232                 //Keyboard::magic_widget_drop_focus();
 233                 _region.note_left (this);
 234                 if (!selected()) {
 235                         hide_velocity();
 236                 }
 237                 break;
 238
 239         case GDK_BUTTON_PRESS:
 240                 if (ev->button.button == 3) {
 241                         show_channel_selector();
 242                         return true;
 243                 }
 244                 break;
 245
 246         case GDK_BUTTON_RELEASE:
 247                 if (ev->button.button == 3) {
 248                         return true;
 249                 }
 250                 break;
 251
 252         default:
 253                 break;
 254         }
 255
 256         return false;
 257 }
 258
 259 } // namespace Canvas
 260 } // namespace Gnome
 261