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