13
0
livetrax/gtk2_ardour/canvas-midi-event.cc
David Robillard 3c22c8f2d5 Functional note moving.
Better vertical note snap, don't let the mouse drift away from the note on fast drags.


git-svn-id: svn://localhost/ardour2/trunk@2218 d708f5d6-7413-0410-9779-e7cbd77b26cf
2007-08-02 04:43:43 +00:00

183 lines
4.2 KiB
C++

/*
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-midi-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 {
CanvasMidiEvent::CanvasMidiEvent(MidiRegionView& region, Item* item, const ARDOUR::MidiModel::Note* note)
: _region(region)
, _item(item)
, _state(None)
, _note(note)
{
}
bool
CanvasMidiEvent::on_event(GdkEvent* ev)
{
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;
if (_region.get_time_axis_view().editor.current_mouse_mode() != Editing::MouseNote)
return false;
switch (ev->type) {
case GDK_KEY_PRESS:
if (_note && ev->key.keyval == GDK_Delete) {
_region.start_remove_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:
Keyboard::magic_widget_grab_focus();
_item->grab_focus();
_region.note_entered(this);
break;
case GDK_LEAVE_NOTIFY:
Keyboard::magic_widget_drop_focus();
_region.get_canvas_group()->grab_focus();
break;
case GDK_BUTTON_PRESS:
_state = Pressed;
return true;
case GDK_MOTION_NOTIFY:
event_x = ev->motion.x;
event_y = ev->motion.y;
//cerr << "MOTION @ " << event_x << ", " << event_y << endl;
_item->property_parent().get_value()->w2i(event_x, event_y);
switch (_state) {
case Pressed: // Drag begin
_item->grab(GDK_POINTER_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
Gdk::Cursor(Gdk::FLEUR), ev->motion.time);
_state = Dragging;
last_x = event_x;
last_y = event_y;
drag_delta_x = 0;
drag_delta_note = 0;
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;
}
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) < _region.note_height()) {
dy = 0.0;
} else {
int8_t this_delta_note;
if (dy > 0)
this_delta_note = (int8_t)ceil(dy / _region.note_height());
else
this_delta_note = (int8_t)floor(dy / _region.note_height());
drag_delta_note -= this_delta_note;
dy = _region.note_height() * this_delta_note;
last_y = last_y + dy;
}
_item->move(dx, dy);
return true;
default:
break;
}
break;
case GDK_BUTTON_RELEASE:
event_x = ev->button.x;
event_y = ev->button.y;
_item->property_parent().get_value()->w2i(event_x, event_y);
switch (_state) {
case Pressed: // Clicked
_state = None;
return true;
case Dragging: // Dropped
_item->ungrab(ev->button.time);
_state = None;
if (_note) {
// This would be nicer with a MoveCommand that doesn't need to copy...
_region.start_delta_command();
_region.command_remove_note(this);
MidiModel::Note copy(*_note);
double delta_t = _region.midi_view()->editor.pixel_to_frame(
abs(drag_delta_x));
if (drag_delta_x < 0)
delta_t *= -1;
copy.set_time(_note->time() + delta_t);
copy.set_note(_note->note() + drag_delta_note);
_region.command_add_note(copy);
_region.apply_command();
}
return true;
default:
break;
}
default:
break;
}
return false;
}
} // namespace Canvas
} // namespace Gnome