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livetrax/gtk2_ardour/note_base.cc

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/*
* Copyright (C) 2013-2018 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2014 David Robillard <d@drobilla.net>
* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
* Copyright (C) 2016 Nick Mainsbridge <mainsbridge@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <iostream>
#include "gtkmm2ext/keyboard.h"
#include "evoral/Note.h"
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#include "canvas/text.h"
#include "note_base.h"
#include "public_editor.h"
#include "editing_syms.h"
#include "keyboard.h"
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#include "midi_region_view.h"
using namespace std;
using namespace Gtkmm2ext;
using ARDOUR::MidiModel;
using namespace ArdourCanvas;
/// dividing the hue circle in 16 parts, hand adjusted for equal look, courtesy Thorsten Wilms
const uint32_t NoteBase::midi_channel_colors[16] = {
0xd32d2dff, 0xd36b2dff, 0xd3972dff, 0xd3d12dff,
0xa0d32dff, 0x7dd32dff, 0x2dd45eff, 0x2dd3c4ff,
0x2da5d3ff, 0x2d6fd3ff, 0x432dd3ff, 0x662dd3ff,
0x832dd3ff, 0xa92dd3ff, 0xd32dbfff, 0xd32d67ff
};
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bool NoteBase::_color_init = false;
Gtkmm2ext::Color NoteBase::_selected_col = 0;
Gtkmm2ext::SVAModifier NoteBase::color_modifier;
Gtkmm2ext::Color NoteBase::velocity_color_table[128];
void
NoteBase::set_colors ()
{
for (uint8_t i = 0; i < 128; ++i) {
velocity_color_table[i] = 0; /* out of bounds because zero alpha makes no sense */
}
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_selected_col = UIConfiguration::instance().color ("midi note selected outline");
color_modifier = UIConfiguration::instance().modifier ("midi note");
}
NoteBase::NoteBase(MidiRegionView& region, bool with_events, const std::shared_ptr<NoteType> note)
: _region(region)
, _item (0)
, _text(0)
, _state(None)
, _note(note)
, _with_events (with_events)
, _flags (Flags (0))
, _valid (true)
, _mouse_x_fraction (-1.0)
, _mouse_y_fraction (-1.0)
{
if (!_color_init) {
NoteBase::set_colors();
_color_init = true;
}
}
NoteBase::~NoteBase()
{
_region.note_deleted (this);
delete _text;
}
void
NoteBase::set_item (Item* item)
{
_item = item;
_item->set_data ("notebase", this);
if (_with_events) {
_item->Event.connect (sigc::mem_fun (*this, &NoteBase::event_handler));
}
}
void
NoteBase::invalidate ()
{
_valid = false;
}
void
NoteBase::validate ()
{
_valid = true;
}
void
NoteBase::show_velocity()
{
if (!_text) {
_text = new Text (_item->parent ());
_text->set_ignore_events (true);
_text->set_color (UIConfiguration::instance().color_mod ("midi note velocity text", "midi note velocity text"));
_text->set_alignment (Pango::ALIGN_CENTER);
}
_text->set_x_position ((x0() + x1()) / 2);
_text->set_y_position ((y0() + y1()) / 2);
ostringstream velo(ios::ate);
velo << int(_note->velocity());
_text->set (velo.str ());
_text->show();
_text->raise_to_top();
}
void
NoteBase::hide_velocity()
{
delete _text;
_text = 0;
}
void
NoteBase::on_channel_selection_change(uint16_t selection)
{
// make note change its color if its channel is not marked active
if ( (selection & (1 << _note->channel())) == 0 ) {
const Gtkmm2ext::Color inactive_ch = UIConfiguration::instance().color ("midi note inactive channel");
set_fill_color(inactive_ch);
set_outline_color(calculate_outline(inactive_ch, (_flags == Selected)));
} else {
// set the color according to the notes selection state
set_selected (_flags == Selected);
}
// this forces the item to update..... maybe slow...
_item->hide();
_item->show();
}
void
NoteBase::on_channel_change(uint8_t channel)
{
_region.note_selected(this, true);
_region.change_channel(channel);
}
void
NoteBase::set_selected(bool selected)
{
if (!_note) {
return;
}
if (selected) {
_flags = Flags (_flags | Selected);
} else {
_flags = Flags (_flags & ~Selected);
}
const uint32_t base_col = base_color();
set_fill_color (base_col);
set_outline_color(calculate_outline (base_col, (_flags == Selected)));
}
#define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
uint32_t
NoteBase::base_color ()
{
return base_color (_note->velocity(), _region.color_mode(), _region.midi_stream_view()->get_region_color(), _note->channel(), selected());
}
uint32_t
NoteBase::base_color (int velocity, ARDOUR::ColorMode color_mode, Gtkmm2ext::Color default_color, int channel, bool selected)
{
using namespace ARDOUR;
const uint8_t min_opacity = 15;
uint8_t opacity = std::max(min_opacity, uint8_t(velocity + velocity));
switch (color_mode) {
case TrackColor:
{
const uint32_t region_color = default_color;
return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (region_color, opacity), _selected_col,
0.5);
}
case ChannelColors:
return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (NoteBase::midi_channel_colors[channel], opacity),
_selected_col, 0.5);
default:
if (UIConfiguration::instance().get_use_note_color_for_velocity()) {
return meter_style_fill_color(velocity, selected);
} else {
const uint32_t region_color = default_color;
return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (region_color, opacity), _selected_col,
0.5);
}
};
return 0;
}
void
NoteBase::set_mouse_fractions (GdkEvent* ev)
{
double ix, iy;
bool set_cursor = false;
switch (ev->type) {
case GDK_MOTION_NOTIFY:
ix = ev->motion.x;
iy = ev->motion.y;
set_cursor = true;
break;
case GDK_ENTER_NOTIFY:
ix = ev->crossing.x;
iy = ev->crossing.y;
set_cursor = true;
break;
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
ix = ev->button.x;
iy = ev->button.y;
break;
default:
_mouse_x_fraction = -1.0;
_mouse_y_fraction = -1.0;
return;
}
boost::optional<ArdourCanvas::Rect> bbox = _item->bounding_box ();
assert (bbox);
_item->canvas_to_item (ix, iy);
/* XXX: CANVAS */
/* hmm, something wrong here. w2i should give item-local coordinates
but it doesn't. for now, finesse this.
*/
ix = ix - bbox.get().x0;
iy = iy - bbox.get().y0;
/* fraction of width/height */
double xf;
double yf;
bool notify = false;
xf = ix / bbox.get().width ();
yf = iy / bbox.get().height ();
if (xf != _mouse_x_fraction || yf != _mouse_y_fraction) {
notify = true;
}
_mouse_x_fraction = xf;
_mouse_y_fraction = yf;
if (notify) {
if (big_enough_to_trim()) {
_region.note_mouse_position (_mouse_x_fraction, _mouse_y_fraction, set_cursor);
} else {
/* pretend the mouse is in the middle, because this is not big enough
to trim right now.
*/
_region.note_mouse_position (0.5, 0.5, set_cursor);
}
}
}
bool
NoteBase::event_handler (GdkEvent* ev)
{
PublicEditor& editor = _region.get_time_axis_view().editor();
if (!editor.internal_editing()) {
return false;
}
if (_region.get_time_axis_view ().layer_display () == Stacked) {
/* only allow edting notes in the topmost layer */
if (_region.region()->layer() != _region.region()->playlist()->top_layer ()) {
/* this stll allows the draw tool to work, and edit cursor is updated */
return false;
}
}
switch (ev->type) {
case GDK_ENTER_NOTIFY:
_region.note_entered (this);
set_mouse_fractions (ev);
break;
case GDK_LEAVE_NOTIFY:
set_mouse_fractions (ev);
_region.note_left (this);
break;
case GDK_MOTION_NOTIFY:
set_mouse_fractions (ev);
break;
case GDK_BUTTON_PRESS:
set_mouse_fractions (ev);
break;
case GDK_BUTTON_RELEASE:
set_mouse_fractions (ev);
break;
default:
break;
}
return editor.canvas_note_event (ev, _item);
}
bool
NoteBase::mouse_near_ends () const
{
return (_mouse_x_fraction >= 0.0 && _mouse_x_fraction < 0.25) ||
(_mouse_x_fraction >= 0.75 && _mouse_x_fraction < 1.0);
}
bool
NoteBase::big_enough_to_trim () const
{
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return (x1() - x0()) > 10;
}
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Gtkmm2ext::Color
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NoteBase::meter_style_fill_color(uint8_t vel, bool /* selected */)
{
/* note that because vel is uint8_t, we don't need bounds checking for
the color lookup table.
*/
if (velocity_color_table[vel] == 0) {
Gtkmm2ext::Color col;
if (vel < 32) {
col = UINT_INTERPOLATE(UIConfiguration::instance().color ("midi meter color0"), UIConfiguration::instance().color ("midi meter color1"), (vel / 32.0));
col = Gtkmm2ext::change_alpha (col, color_modifier.a());
} else if (vel < 64) {
col = UINT_INTERPOLATE(UIConfiguration::instance().color ("midi meter color2"), UIConfiguration::instance().color ("midi meter color3"), ((vel-32) / 32.0));
col = Gtkmm2ext::change_alpha (col, color_modifier.a());
} else if (vel < 100) {
col = UINT_INTERPOLATE(UIConfiguration::instance().color ("midi meter color4"), UIConfiguration::instance().color ("midi meter color5"), ((vel-64) / 36.0));
col = Gtkmm2ext::change_alpha (col, color_modifier.a());
} else if (vel < 112) {
col = UINT_INTERPOLATE(UIConfiguration::instance().color ("midi meter color6"), UIConfiguration::instance().color ("midi meter color7"), ((vel-100) / 12.0));
col = Gtkmm2ext::change_alpha (col, color_modifier.a());
} else {
col = UINT_INTERPOLATE(UIConfiguration::instance().color ("midi meter color8"), UIConfiguration::instance().color ("midi meter color9"), ((vel-112) / 17.0));
col = Gtkmm2ext::change_alpha (col, color_modifier.a());
}
velocity_color_table[vel] = col;
return col;
}
return velocity_color_table[vel];
}
void
NoteBase::set_hide_selection (bool yn)
{
if (yn) {
_flags = Flags (_flags | HideSelection);
} else {
_flags = Flags (_flags & ~HideSelection);
}
if (_flags & Selected) {
/* maybe (?) change outline color */
set_outline_color (calculate_outline (base_color(), !yn));
}
/* no need to redo color if it wasn't selected and we just changed
* "hide selected" since nothing will change
*/
}