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livetrax/gtk2_ardour/canvas-note-event.cc
David Robillard 8ca72c4eca Fix various MIDI corruption bugs. 
Re-enable MIDI CC controller bars and other immediate output (hans commented out, tsk tsk).
Write channel mode as textual enumeration instead of magic number.
Better atomic (almost) channel mode switching on MIDI ring buffer (was a possible, if unlikely, source of corruption).
Handle some cases of broken MIDI, and oversized events, more gracefully.


git-svn-id: svn://localhost/ardour2/branches/3.0@3335 d708f5d6-7413-0410-9779-e7cbd77b26cf
2008-05-12 02:40:48 +00:00

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/*
Copyright (C) 2007 Paul Davis
Author: Dave 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 "canvas-note-event.h"
#include "midi_region_view.h"
#include "public_editor.h"
#include "editing_syms.h"
#include "keyboard.h"
using namespace std;
using ARDOUR::MidiModel;
namespace Gnome {
namespace Canvas {
CanvasNoteEvent::CanvasNoteEvent(MidiRegionView& region, Item* item,
const boost::shared_ptr<ARDOUR::Note> note)
: _region(region)
, _item(item)
, _text(0)
, _channel_selector_widget()
, _state(None)
, _note(note)
, _selected(false)
{
}
CanvasNoteEvent::~CanvasNoteEvent()
{
if (_text) {
_text->hide();
delete _text;
}
if (_channel_selector_widget)
delete _channel_selector_widget;
}
void
CanvasNoteEvent::move_event(double dx, double dy)
{
_item->move(dx, dy);
if (_text) {
_text->hide();
_text->move(dx, dy);
_text->show();
}
}
void
CanvasNoteEvent::show_velocity(void)
{
hide_velocity();
_text = new Text(*(_item->property_parent()));
_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->property_justification() = Gtk::JUSTIFY_CENTER;
_text->property_fill_color_rgba() = ARDOUR_UI::config()->canvasvar_MidiNoteSelectedOutline.get();
_text->show();
_text->lower_to_bottom();
_text->raise(2);
}
void
CanvasNoteEvent::hide_velocity(void)
{
if(_text) {
_text->hide();
delete _text;
}
_text = 0;
}
void
CanvasNoteEvent::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 ) {
set_fill_color(ARDOUR_UI::config()->canvasvar_MidiNoteFillInactiveChannel.get());
set_outline_color(ARDOUR_UI::config()->canvasvar_MidiNoteOutlineInactiveChannel.get());
} else {
// set the color according to the notes selection state
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);
hide_channel_selector();
_region.change_channel(channel);
}
void
CanvasNoteEvent::show_channel_selector(void)
{
if (_channel_selector_widget == 0) {
cerr << "Note has channel: " << int(_note->channel()) << endl;
SingleMidiChannelSelector* _channel_selector = new SingleMidiChannelSelector(_note->channel());
_channel_selector->show_all();
_channel_selector->channel_selected.connect(
sigc::mem_fun(this, &CanvasNoteEvent::on_channel_change));
_channel_selector_widget =
new Widget(*(_item->property_parent()),
x1(),
y2() + 2,
(Gtk::Widget &) *_channel_selector);
_channel_selector_widget->hide();
_channel_selector_widget->property_height() = 100;
_channel_selector_widget->property_width() = 100;
_channel_selector_widget->raise_to_top();
_channel_selector_widget->show();
} else {
hide_channel_selector();
}
}
void
CanvasNoteEvent::hide_channel_selector(void)
{
if (_channel_selector_widget) {
_channel_selector_widget->hide();
delete _channel_selector_widget;
_channel_selector_widget = 0;
}
}
void
CanvasNoteEvent::selected(bool yn)
{
if (!_note) {
return;
} else if (yn) {
set_fill_color(UINT_INTERPOLATE(note_fill_color(_note->velocity()),
ARDOUR_UI::config()->canvasvar_MidiNoteSelectedOutline.get(), 0.1));
set_outline_color(ARDOUR_UI::config()->canvasvar_MidiNoteSelectedOutline.get());
show_velocity();
} else {
set_fill_color(note_fill_color(_note->velocity()));
set_outline_color(note_outline_color(_note->velocity()));
hide_velocity();
}
_selected = yn;
}
bool
CanvasNoteEvent::on_event(GdkEvent* ev)
{
MidiStreamView *streamview = _region.midi_stream_view();
static uint8_t drag_delta_note = 0;
static double drag_delta_x = 0;
static double last_x, last_y;
double event_x, event_y, dx, dy;
bool select_mod;
uint8_t d_velocity = 10;
if (_region.get_time_axis_view().editor.current_mouse_mode() != Editing::MouseNote)
return false;
switch (ev->type) {
case GDK_SCROLL:
if (Keyboard::modifier_state_equals (ev->scroll.state, Keyboard::Level4Modifier)) {
d_velocity = 1;
}
if (ev->scroll.direction == GDK_SCROLL_UP) {
_region.note_selected(this, true);
if (_region.mouse_state() == MidiRegionView::SelectTouchDragging) {
// TODO: absolute velocity
} else {
_region.change_velocity(d_velocity, true);
}
return true;
} else if (ev->scroll.direction == GDK_SCROLL_DOWN) {
_region.note_selected(this, true);
if (_region.mouse_state() == MidiRegionView::SelectTouchDragging) {
// TODO: absolute velocity
} else {
_region.change_velocity(-d_velocity, true);
}
return true;
} else {
return false;
}
case GDK_KEY_PRESS:
if (_note && ev->key.keyval == GDK_Delete) {
selected(true);
_region.start_delta_command();
_region.command_remove_note(this);
}
break;
case GDK_KEY_RELEASE:
if (ev->key.keyval == GDK_Delete) {
_region.apply_command();
}
break;
case GDK_ENTER_NOTIFY:
_region.note_entered(this);
_item->grab_focus();
show_velocity();
Keyboard::magic_widget_grab_focus();
break;
case GDK_LEAVE_NOTIFY:
Keyboard::magic_widget_drop_focus();
if (! selected()) {
hide_velocity();
}
_region.get_canvas_group()->grab_focus();
break;
case GDK_BUTTON_PRESS:
if (ev->button.button == 1) {
_state = Pressed;
} else if (ev->button.button == 3) {
show_channel_selector();
}
return true;
case GDK_MOTION_NOTIFY:
event_x = ev->motion.x;
event_y = ev->motion.y;
switch (_state) {
case Pressed: // Drag begin
if (_region.mouse_state() != MidiRegionView::SelectTouchDragging) {
_item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
_state = Dragging;
_item->property_parent().get_value()->w2i(event_x, event_y);
event_x = _region.snap_to_pixel(event_x);
last_x = event_x;
last_y = event_y;
drag_delta_x = 0;
drag_delta_note = 0;
_region.note_selected(this, true);
}
return true;
case Dragging: // Drag motion
if (ev->motion.is_hint) {
int t_x;
int t_y;
GdkModifierType state;
gdk_window_get_pointer(ev->motion.window, &t_x, &t_y, &state);
event_x = t_x;
event_y = t_y;
}
_item->property_parent().get_value()->w2i(event_x, event_y);
// Snap
event_x = _region.snap_to_pixel(event_x);
dx = event_x - last_x;
dy = event_y - last_y;
last_x = event_x;
drag_delta_x += dx;
// Snap to note rows
if (abs(dy) < streamview->note_height()) {
dy = 0.0;
} else {
int8_t this_delta_note;
if (dy > 0) {
this_delta_note = (int8_t)ceil(dy / streamview->note_height() / 2.0);
} else {
this_delta_note = (int8_t)floor(dy / streamview->note_height() / 2.0);
}
drag_delta_note -= this_delta_note;
dy = streamview->note_height() * this_delta_note;
last_y = last_y + dy;
}
_region.move_selection(dx, dy);
return true;
default:
break;
}
break;
case GDK_BUTTON_RELEASE:
select_mod = (ev->motion.state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK));
event_x = ev->button.x;
event_y = ev->button.y;
_item->property_parent().get_value()->w2i(event_x, event_y);
if (ev->button.button == 3) {
return true;
}
switch (_state) {
case Pressed: // Clicked
if (_region.midi_view()->editor.current_midi_edit_mode() == Editing::MidiEditSelect) {
_state = None;
if (_selected && !select_mod && _region.selection_size() > 1)
_region.unique_select(this);
else if (_selected)
_region.note_deselected(this, select_mod);
else
_region.note_selected(this, select_mod);
} else if (_region.midi_view()->editor.current_midi_edit_mode() == Editing::MidiEditErase) {
_region.start_delta_command();
_region.command_remove_note(this);
_region.apply_command();
}
return true;
case Dragging: // Dropped
_item->ungrab(ev->button.time);
_state = None;
if (_note)
_region.note_dropped(this,
_region.midi_view()->editor.pixel_to_frame(abs(drag_delta_x))
* ((drag_delta_x < 0.0) ? -1 : 1),
drag_delta_note);
return true;
default:
break;
}
default:
break;
}
return false;
}
} // namespace Canvas
} // namespace Gnome
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