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::move_event(double dx, double dy)
  78 {
  79         _item->move(dx, dy);
  80         if (_text) {
  81                 _text->hide();
  82                 _text->move(dx, dy);
  83                 _text->show();
  84         }
  85 }
  86
  87 void
  88 CanvasNoteEvent::show_velocity()
  89 {
  90         if (!_text) {
  91                 _text = new InteractiveText(*(_item->property_parent()), this);
  92         }
  93         _text->property_x() = (x1() + x2()) /2;
  94         _text->property_y() = (y1() + y2()) /2;
  95         ostringstream velo(ios::ate);
  96         velo << int(_note->velocity());
  97         _text->property_text() = velo.str();
  98         _text->property_justification() = Gtk::JUSTIFY_CENTER;
  99         _text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
 100         _text->show();
 101         _text->raise_to_top();
 102 }
 103
 104 void
 105 CanvasNoteEvent::hide_velocity()
 106 {
 107         if (_text) {
 108                 _text->hide();
 109                 delete _text;
 110                 _text = 0;
 111         }
 112 }
 113
 114 void
 115 CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
 116 {
 117         // make note change its color if its channel is not marked active
 118         if ( (selection & (1 << _note->channel())) == 0 ) {
 119                 set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
 120                 set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
 121         } else {
 122                 // set the color according to the notes selection state
 123                 selected(_selected);
 124         }
 125         // this forces the item to update..... maybe slow...
 126         _item->hide();
 127         _item->show();
 128 }
 129
 130 void
 131 CanvasNoteEvent::on_channel_change(uint8_t channel)
 132 {
 133         _region.note_selected(this, true);
 134         hide_channel_selector();
 135         _region.change_channel(channel);
 136 }
 137
 138 void
 139 CanvasNoteEvent::show_channel_selector(void)
 140 {
 141         if (_channel_selector_widget == 0) {
 142                 cerr << "Note has channel: " << int(_note->channel()) << endl;
 143                 SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
 144                 _channel_selector->show_all();
 145                 _channel_selector->channel_selected.connect(
 146                         sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
 147
 148                 _channel_selector_widget = new Widget(*(_item->property_parent()),
 149                                 x1(),
 150                                 y2() + 2,
 151                                 (Gtk::Widget &) *_channel_selector);
 152
 153                 _channel_selector_widget->hide();
 154                 _channel_selector_widget->property_height() = 100;
 155                 _channel_selector_widget->property_width() = 100;
 156                 _channel_selector_widget->raise_to_top();
 157                 _channel_selector_widget->show();
 158         } else {
 159                 hide_channel_selector();
 160         }
 161 }
 162
 163 void
 164 CanvasNoteEvent::hide_channel_selector(void)
 165 {
 166         if (_channel_selector_widget) {
 167                 _channel_selector_widget->hide();
 168                 delete _channel_selector_widget;
 169                 _channel_selector_widget = 0;
 170         }
 171 }
 172
 173 void
 174 CanvasNoteEvent::selected(bool selected)
 175 {
 176         if (!_note) {
 177                 return;
 178         } else if (selected) {
 179                 set_fill_color(UINT_INTERPOLATE(base_color(),
 180                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5));
 181                 set_outline_color(calculate_outline(
 182                                 ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
 183         } else {
 184                 set_fill_color(base_color());
 185                 set_outline_color(calculate_outline(base_color()));
 186         }
 187
 188         _selected = selected;
 189 }
 190
 191 #define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
 192
 193 uint32_t
 194 CanvasNoteEvent::base_color()
 195 {
 196         using namespace ARDOUR;
 197
 198         ColorMode mode = _region.color_mode();
 199
 200         const uint8_t min_opacity = 15;
 201         uint8_t       opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
 202
 203         switch (mode) {
 204         case TrackColor:
 205                 {
 206                         Gdk::Color color = _region.midi_stream_view()->get_region_color();
 207                         return RGBA_TO_UINT(
 208                                         SCALE_USHORT_TO_UINT8_T(color.get_red()),
 209                                         SCALE_USHORT_TO_UINT8_T(color.get_green()),
 210                                         SCALE_USHORT_TO_UINT8_T(color.get_blue()),
 211                                         opacity);
 212                 }
 213
 214         case ChannelColors:
 215                 return UINT_RGBA_CHANGE_A(CanvasNoteEvent::midi_channel_colors[_note->channel()],
 216                                                   opacity);
 217
 218         default:
 219                 return meter_style_fill_color(_note->velocity());
 220         };
 221
 222         return 0;
 223 }
 224
 225 bool
 226 CanvasNoteEvent::on_event(GdkEvent* ev)
 227 {
 228         PublicEditor& editor (_region.get_time_axis_view().editor());
 229
 230         if (!editor.internal_editing()) {
 231                 return false;
 232         }
 233
 234         switch (ev->type) {
 235         case GDK_ENTER_NOTIFY:
 236                 _region.note_entered(this);
 237                 //Keyboard::magic_widget_grab_focus();
 238                 break;
 239
 240         case GDK_LEAVE_NOTIFY:
 241                 //Keyboard::magic_widget_drop_focus();
 242                 _region.note_left (this);
 243                 if (!selected()) {
 244                         hide_velocity();
 245                 }
 246                 break;
 247
 248         case GDK_BUTTON_PRESS:
 249                 if (ev->button.button == 3) {
 250                         show_channel_selector();
 251                         return true;
 252                 }
 253                 break;
 254
 255         case GDK_BUTTON_RELEASE:
 256                 if (ev->button.button == 3) {
 257                         return true;
 258                 }
 259                 break;
 260
 261         default:
 262                 break;
 263         }
 264
 265         return false;
 266 }
 267
 268 } // namespace Canvas
 269 } // namespace Gnome
 270