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livetrax/gtk2_ardour/canvas-note-event.cc

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/*
Copyright (C) 2007 Paul Davis
Author: David Robillard
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iostream>
#include "gtkmm2ext/keyboard.h"
#include "canvas-note-event.h"
#include "midi_region_view.h"
#include "public_editor.h"
#include "editing_syms.h"
#include "keyboard.h"
using namespace std;
using namespace Gtkmm2ext;
using ARDOUR::MidiModel;
namespace Gnome {
namespace Canvas {
PBD::Signal1<void,CanvasNoteEvent*> CanvasNoteEvent::CanvasNoteEventDeleted;
/// dividing the hue circle in 16 parts, hand adjusted for equal look, courtesy Thorsten Wilms
const uint32_t CanvasNoteEvent::midi_channel_colors[16] = {
0xd32d2dff, 0xd36b2dff, 0xd3972dff, 0xd3d12dff,
0xa0d32dff, 0x7dd32dff, 0x2dd45eff, 0x2dd3c4ff,
0x2da5d3ff, 0x2d6fd3ff, 0x432dd3ff, 0x662dd3ff,
0x832dd3ff, 0xa92dd3ff, 0xd32dbfff, 0xd32d67ff
};
CanvasNoteEvent::CanvasNoteEvent(MidiRegionView& region, Item* item, const boost::shared_ptr<NoteType> note)
: _region(region)
, _item(item)
, _text(0)
, _state(None)
, _note(note)
, _selected(false)
, _valid (true)
, _mouse_x_fraction (-1.0)
, _mouse_y_fraction (-1.0)
, _channel_selection (0xffff)
{
}
CanvasNoteEvent::~CanvasNoteEvent()
{
CanvasNoteEventDeleted (this);
if (_text) {
_text->hide();
delete _text;
}
}
void
CanvasNoteEvent::invalidate ()
{
_valid = false;
}
void
CanvasNoteEvent::validate ()
{
_valid = true;
}
void
CanvasNoteEvent::show_velocity()
{
if (!_text) {
_text = new NoEventText (*(_item->property_parent()));
_text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteVelocityText.get();
_text->property_justification() = Gtk::JUSTIFY_CENTER;
}
_text->property_x() = (x1() + x2()) /2;
_text->property_y() = (y1() + y2()) /2;
ostringstream velo(ios::ate);
velo << int(_note->velocity());
_text->property_text() = velo.str();
_text->show();
_text->raise_to_top();
}
void
CanvasNoteEvent::hide_velocity()
{
if (_text) {
_text->hide();
delete _text;
_text = 0;
}
}
void
CanvasNoteEvent::on_channel_selection_change(uint16_t selection)
{
_channel_selection = selection;
/* this takes into account whether or not the note should be drawn as inactive */
set_selected (_selected);
// this forces the item to update..... maybe slow...
_item->hide();
_item->show();
}
void
CanvasNoteEvent::on_channel_change(uint8_t channel)
{
_region.note_selected(this, true);
_region.change_channel(channel);
}
void
CanvasNoteEvent::set_selected(bool selected)
{
if (!_note) {
return;
}
_selected = selected;
bool const active = (_channel_selection & (1 << _note->channel())) != 0;
if (_selected && active) {
set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get()));
set_fill_color (base_color ());
} else {
if (active) {
set_fill_color(base_color());
set_outline_color(calculate_outline(base_color()));
} else {
set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get());
set_outline_color(calculate_outline(ARDOUR_UI::config()->canvasvar_MidiNoteInactiveChannel.get()));
}
}
}
#define SCALE_USHORT_TO_UINT8_T(x) ((x) / 257)
uint32_t
CanvasNoteEvent::base_color()
{
using namespace ARDOUR;
ColorMode mode = _region.color_mode();
const uint8_t min_opacity = 15;
uint8_t opacity = std::max(min_opacity, uint8_t(_note->velocity() + _note->velocity()));
switch (mode) {
case TrackColor:
{
Gdk::Color color = _region.midi_stream_view()->get_region_color();
return UINT_INTERPOLATE (RGBA_TO_UINT(
SCALE_USHORT_TO_UINT8_T(color.get_red()),
SCALE_USHORT_TO_UINT8_T(color.get_green()),
SCALE_USHORT_TO_UINT8_T(color.get_blue()),
opacity),
ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
}
case ChannelColors:
return UINT_INTERPOLATE (UINT_RGBA_CHANGE_A (CanvasNoteEvent::midi_channel_colors[_note->channel()],
opacity),
ARDOUR_UI::config()->canvasvar_MidiNoteSelected.get(), 0.5);
default:
return meter_style_fill_color(_note->velocity(), selected());
};
return 0;
}
void
CanvasNoteEvent::set_mouse_fractions (GdkEvent* ev)
{
double ix, iy;
double bx1, bx2, by1, by2;
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;
}
_item->get_bounds (bx1, by1, bx2, by2);
_item->w2i (ix, iy);
/* hmm, something wrong here. w2i should give item-local coordinates
but it doesn't. for now, finesse this.
*/
ix = ix - bx1;
iy = iy - by1;
/* fraction of width/height */
double xf;
double yf;
bool notify = false;
xf = ix / (bx2 - bx1);
yf = iy / (by2 - by1);
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
CanvasNoteEvent::on_event(GdkEvent* ev)
{
if (!_region.get_time_axis_view().editor().internal_editing()) {
return false;
}
switch (ev->type) {
case GDK_ENTER_NOTIFY:
set_mouse_fractions (ev);
_region.note_entered (this);
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);
if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state) && _selected) {
_region.get_time_axis_view().editor().edit_notes (_region);
return true;
}
break;
case GDK_BUTTON_RELEASE:
set_mouse_fractions (ev);
if (ev->button.button == 3 && Keyboard::no_modifiers_active (ev->button.state)) {
return true;
}
break;
default:
break;
}
return false;
}
bool
CanvasNoteEvent::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
CanvasNoteEvent::big_enough_to_trim () const
{
return (x2() - x1()) > 20; /* canvas units, really pixels */
}
} // namespace Canvas
} // namespace Gnome