13
0
livetrax/libs/widgets/ardour_ctrl_base.cc

396 lines
8.3 KiB
C++

/*
* Copyright (C) 2010 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2017-2021 Robin Gareus <robin@gareus.org>
*
* 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 <cmath>
#include <algorithm>
#include <pangomm/layout.h>
#include "pbd/compose.h"
#include "pbd/controllable.h"
#include "pbd/error.h"
#include "gtkmm2ext/colors.h"
#include "gtkmm2ext/gui_thread.h"
#include "gtkmm2ext/keyboard.h"
#include "gtkmm2ext/rgb_macros.h"
#include "gtkmm2ext/utils.h"
#include "widgets/ardour_ctrl_base.h"
#include "widgets/ui_config.h"
#include "pbd/i18n.h"
using namespace Gtkmm2ext;
using namespace ArdourWidgets;
using namespace Gtk;
using namespace Glib;
using namespace PBD;
using std::max;
using std::min;
using namespace std;
ArdourCtrlBase::ArdourCtrlBase (Flags flags)
: _req_width (0)
, _req_height (0)
, _hovering (false)
, _val (0)
, _normal (0)
, _flags (flags)
, _tooltip (this)
, _grabbed_x (0)
, _grabbed_y (0)
, _dead_zone_delta (0)
{
UIConfigurationBase::instance().ColorsChanged.connect (sigc::mem_fun (*this, &ArdourCtrlBase::color_handler));
#ifdef VBM
_flags = (Flags)(static_cast <int>(_flags) | (int)NoHorizontal);
#endif
}
ArdourCtrlBase::~ArdourCtrlBase()
{
}
void
ArdourCtrlBase::set_size_request (int w, int h)
{
if (_req_width == w && _req_height == h) {
return;
}
_req_width = w;
_req_height = h;
queue_resize ();
}
void
ArdourCtrlBase::on_size_request (Gtk::Requisition* req)
{
req->width = _req_width;
req->height = _req_height;
if (req->width < 1) { req->width = 13; }
if (req->height < 1) { req->height = 13; }
}
bool
ArdourCtrlBase::on_scroll_event (GdkEventScroll* ev)
{
/* mouse wheel */
float scale = 0.05; //by default, we step in 1/20ths of the knob travel
if (ev->state & Keyboard::GainFineScaleModifier) {
if (ev->state & Keyboard::GainExtraFineScaleModifier) {
scale *= 0.01;
} else {
scale *= 0.10;
}
}
if (_flags & Reverse) {
scale *= -1;
}
boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (c) {
float val = c->get_interface (true);
if ( ev->direction == GDK_SCROLL_UP )
val += scale;
else
val -= scale;
c->set_interface (val, true);
}
return true;
}
bool
ArdourCtrlBase::on_motion_notify_event (GdkEventMotion *ev)
{
if (!(ev->state & Gdk::BUTTON1_MASK)) {
return true;
}
boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (!c) {
return true;
}
/* scale the adjustment based on keyboard modifiers & GUI size */
const float ui_scale = max (1.f, UIConfigurationBase::instance().get_ui_scale());
float scale = 0.0025 / ui_scale;
if (ev->state & Keyboard::GainFineScaleModifier) {
if (ev->state & Keyboard::GainExtraFineScaleModifier) {
scale *= 0.01;
} else {
scale *= 0.10;
}
}
/* calculate the travel of the mouse */
int delta = 0;
if ((_flags & NoVertical) == 0) {
delta += (_grabbed_y - ev->y);
}
if ((_flags & NoHorizontal) == 0) {
delta -= (_grabbed_x - ev->x);
}
if (delta == 0) {
return true;
}
if (_flags & Reverse) {
delta *= -1;
}
_grabbed_x = ev->x;
_grabbed_y = ev->y;
float val = c->get_interface (true);
if (_flags & Detent) {
const float px_deadzone = 42.f * ui_scale;
if ((val - _normal) * (val - _normal + delta * scale) < 0) {
/* detent */
const int tozero = (_normal - val) * scale;
int remain = delta - tozero;
if (abs (remain) > px_deadzone) {
/* slow down passing the default value */
remain += (remain > 0) ? px_deadzone * -.5 : px_deadzone * .5;
delta = tozero + remain;
_dead_zone_delta = 0;
} else {
c->set_value (c->normal(), Controllable::NoGroup);
_dead_zone_delta = remain / px_deadzone;
return true;
}
}
if (fabsf (rintf((val - _normal) / scale) + _dead_zone_delta) < 1) {
c->set_value (c->normal(), Controllable::NoGroup);
_dead_zone_delta += delta / px_deadzone;
return true;
}
_dead_zone_delta = 0;
}
val += delta * scale;
c->set_interface (val, true);
return true;
}
bool
ArdourCtrlBase::on_button_press_event (GdkEventButton *ev)
{
_grabbed_x = ev->x;
_grabbed_y = ev->y;
_dead_zone_delta = 0;
if (ev->type != GDK_BUTTON_PRESS) {
if (_grabbed) {
remove_modal_grab();
_grabbed = false;
StopGesture ();
gdk_pointer_ungrab (GDK_CURRENT_TIME);
}
return true;
}
if (binding_proxy.button_press_handler (ev)) {
return true;
}
if (ev->button != 1 && ev->button != 2) {
return false;
}
set_active_state (Gtkmm2ext::ExplicitActive);
_tooltip.start_drag();
add_modal_grab();
_grabbed = true;
StartGesture ();
gdk_pointer_grab(ev->window,false,
GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK),
NULL,NULL,ev->time);
return true;
}
bool
ArdourCtrlBase::on_button_release_event (GdkEventButton *ev)
{
_tooltip.stop_drag();
_grabbed = false;
StopGesture ();
remove_modal_grab();
gdk_pointer_ungrab (GDK_CURRENT_TIME);
if ( (_grabbed_y == ev->y && _grabbed_x == ev->x) && Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) { //no move, shift-click sets to default
boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (!c) return false;
c->set_value (c->normal(), Controllable::NoGroup);
return true;
}
unset_active_state ();
return true;
}
void
ArdourCtrlBase::color_handler ()
{
set_dirty ();
}
void
ArdourCtrlBase::set_controllable (boost::shared_ptr<Controllable> c)
{
watch_connection.disconnect (); //stop watching the old controllable
if (!c) return;
binding_proxy.set_controllable (c);
c->Changed.connect (watch_connection, invalidator(*this), boost::bind (&ArdourCtrlBase::controllable_changed, this, false), gui_context());
_normal = c->internal_to_interface(c->normal());
controllable_changed();
}
void
ArdourCtrlBase::controllable_changed (bool force_update)
{
boost::shared_ptr<PBD::Controllable> c = binding_proxy.get_controllable();
if (!c) return;
float val = c->get_interface (true);
val = min( max(0.0f, val), 1.0f); // clamp
if (val == _val && !force_update) {
return;
}
_val = val;
if (!_tooltip_prefix.empty()) {
_tooltip.set_tip (_tooltip_prefix + c->get_user_string());
}
set_dirty();
}
void
ArdourCtrlBase::on_style_changed (const RefPtr<Gtk::Style>&)
{
set_dirty ();
}
void
ArdourCtrlBase::on_name_changed ()
{
set_dirty ();
}
void
ArdourCtrlBase::set_active_state (Gtkmm2ext::ActiveState s)
{
if (_active_state != s)
CairoWidget::set_active_state (s);
}
void
ArdourCtrlBase::set_visual_state (Gtkmm2ext::VisualState s)
{
if (_visual_state != s)
CairoWidget::set_visual_state (s);
}
bool
ArdourCtrlBase::on_focus_in_event (GdkEventFocus* ev)
{
set_dirty ();
return CairoWidget::on_focus_in_event (ev);
}
bool
ArdourCtrlBase::on_focus_out_event (GdkEventFocus* ev)
{
set_dirty ();
return CairoWidget::on_focus_out_event (ev);
}
bool
ArdourCtrlBase::on_enter_notify_event (GdkEventCrossing* ev)
{
_hovering = true;
set_dirty ();
boost::shared_ptr<PBD::Controllable> c (binding_proxy.get_controllable ());
if (c) {
PBD::Controllable::GUIFocusChanged (boost::weak_ptr<PBD::Controllable> (c));
}
return CairoWidget::on_enter_notify_event (ev);
}
bool
ArdourCtrlBase::on_leave_notify_event (GdkEventCrossing* ev)
{
_hovering = false;
set_dirty ();
if (binding_proxy.get_controllable()) {
PBD::Controllable::GUIFocusChanged (boost::weak_ptr<PBD::Controllable> ());
}
return CairoWidget::on_leave_notify_event (ev);
}
CtrlPersistentTooltip::CtrlPersistentTooltip (Gtk::Widget* w)
: PersistentTooltip (w, true, 3)
, _dragging (false)
{
}
void
CtrlPersistentTooltip::start_drag ()
{
_dragging = true;
}
void
CtrlPersistentTooltip::stop_drag ()
{
_dragging = false;
}
bool
CtrlPersistentTooltip::dragging () const
{
return _dragging;
}