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livetrax/gtk2_ardour/group_tabs.cc

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/*
Copyright (C) 2009 Paul Davis
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 <gtkmm/stock.h>
#include "ardour/session.h"
#include "ardour/route_group.h"
#include "route_group_dialog.h"
#include "group_tabs.h"
#include "keyboard.h"
#include "i18n.h"
using namespace std;
using namespace Gtk;
using namespace ARDOUR;
GroupTabs::GroupTabs ()
: _session (0),
_dragging (0)
{
}
void
GroupTabs::set_session (Session* s)
{
_session = s;
s->RouteGroupChanged.connect (mem_fun (*this, &GroupTabs::set_dirty));
}
/** Handle a size request.
* @param req GTK requisition
*/
void
GroupTabs::on_size_request (Gtk::Requisition *req)
{
/* Use a dummy, small width and the actual height that we want */
req->width = 16;
req->height = 16;
}
bool
GroupTabs::on_button_press_event (GdkEventButton* ev)
{
using namespace Menu_Helpers;
double const p = primary_coordinate (ev->x, ev->y);
Tab* prev;
Tab* next;
Tab* t = click_to_tab (p, &prev, &next);
if (ev->button == 1 && t) {
_dragging = t;
_drag_moved = false;
_drag_last = p;
double const h = (t->from + t->to) / 2;
_drag_from = p < h;
if (_drag_from) {
/* limit is the end of the previous tab */
_drag_limit = prev ? prev->to : 0;
} else {
/* limit is the start of the next tab */
_drag_limit = next ? next->from : extent ();
}
} else if (ev->button == 3) {
RouteGroup* g = t ? t->group : 0;
get_menu(g)->popup (ev->button, ev->time);
}
return true;
}
bool
GroupTabs::on_motion_notify_event (GdkEventMotion* ev)
{
if (_dragging == 0) {
return false;
}
double const p = primary_coordinate (ev->x, ev->y);
if (p != _drag_last) {
_drag_moved = true;
}
if (_drag_from) {
double f = _dragging->from + p - _drag_last;
if (f < _drag_limit) {
/* limit drag in the `too big' direction */
f = _drag_limit;
}
double const t = _dragging->to - _dragging->last_ui_size;
if (f > t) {
/* limit drag in the `too small' direction */
f = t;
}
_dragging->from = f;
} else {
double t = _dragging->to + p - _drag_last;
if (t > _drag_limit) {
/* limit drag in the `too big' direction */
t = _drag_limit;
}
double const f = _dragging->from + _dragging->first_ui_size;
if (t < f) {
/* limit drag in the `too small' direction */
t = f;
}
_dragging->to = t;
}
set_dirty ();
queue_draw ();
_drag_last = p;
return true;
}
bool
GroupTabs::on_button_release_event (GdkEventButton* ev)
{
if (_dragging == 0) {
return false;
}
if (!_drag_moved) {
if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
/* edit */
RouteGroupDialog d (_dragging->group, Gtk::Stock::APPLY);
d.do_run ();
} else {
/* toggle active state */
_dragging->group->set_active (!_dragging->group->is_active (), this);
_dragging = 0;
}
} else {
/* finish drag */
_dragging = 0;
reflect_tabs (_tabs);
set_dirty ();
queue_draw ();
}
return true;
}
void
GroupTabs::render (cairo_t* cr)
{
if (_dragging == 0) {
_tabs = compute_tabs ();
}
/* background */
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_rectangle (cr, 0, 0, _width, _height);
cairo_fill (cr);
/* tabs */
for (list<Tab>::const_iterator i = _tabs.begin(); i != _tabs.end(); ++i) {
draw_tab (cr, *i);
}
}
/** Convert a click position to a tab.
* @param c Click position.
* @param prev Filled in with the previous tab to the click, or 0.
* @param next Filled in with the next tab after the click, or 0.
* @return Tab under the click, or 0.
*/
GroupTabs::Tab *
GroupTabs::click_to_tab (double c, Tab** prev, Tab** next)
{
*prev = 0;
list<Tab>::iterator i = _tabs.begin ();
while (i != _tabs.end() && (c < i->from || c > i->to)) {
*prev = &(*i);
++i;
}
if (i == _tabs.end()) {
*next = 0;
return 0;
}
list<Tab>::iterator j = i;
++j;
if (j == _tabs.end()) {
*next = 0;
} else {
*next = &(*j);
}
return &(*i);
}