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         switch (ev->type) {
 222         case GDK_ENTER_NOTIFY:
 223                 _region.note_entered(this);
 224                 //Keyboard::magic_widget_grab_focus();
 225                 break;
 226
 227         case GDK_LEAVE_NOTIFY:
 228                 //Keyboard::magic_widget_drop_focus();
 229                 _region.note_left (this);
 230                 if (!selected()) {
 231                         hide_velocity();
 232                 }
 233                 break;
 234
 235         case GDK_BUTTON_PRESS:
 236                 if (ev->button.button == 3) {
 237                         show_channel_selector();
 238                         return true;
 239                 }
 240                 break;
 241
 242         case GDK_BUTTON_RELEASE:
 243                 if (ev->button.button == 3) {
 244                         return true;
 245                 }
 246                 break;
 247
 248         default:
 249                 break;
 250         }
 251
 252         return false;
 253 }
 254
 255 } // namespace Canvas
 256 } // namespace Gnome
 257