diff options
Diffstat (limited to 'libs/surfaces/maschine2/ui_knob.cc')
| -rw-r--r-- | libs/surfaces/maschine2/ui_knob.cc | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/libs/surfaces/maschine2/ui_knob.cc b/libs/surfaces/maschine2/ui_knob.cc new file mode 100644 index 0000000000..f493fd4a9e --- /dev/null +++ b/libs/surfaces/maschine2/ui_knob.cc @@ -0,0 +1,241 @@ +/* + * Copyright (C) 2016 Paul Davis + * Copyright (C) 2016 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, 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 <cmath> + +#include <cairomm/context.h> + +#include "ardour/automation_control.h" +#include "ardour/value_as_string.h" +#include "ardour/dB.h" +#include "ardour/utils.h" + +#include "gtkmm2ext/colors.h" +#include "gtkmm2ext/gui_thread.h" +#include "gtkmm2ext/rgb_macros.h" + +#include "canvas/text.h" + +#include "maschine2.h" +#include "m2controls.h" + +#include "ui_knob.h" + +#include "pbd/i18n.h" + +#ifdef __APPLE__ +#define Rect ArdourCanvas::Rect +#endif + +using namespace PBD; +using namespace ARDOUR; +using namespace ArdourSurface; +using namespace ArdourCanvas; + +Maschine2Knob::Maschine2Knob (PBD::EventLoop* el, Item* parent) + : Container (parent) + , _ctrl (0) + , _eventloop (el) + , _radius (11) + , _val (0) + , _normal (0) +{ + Pango::FontDescription fd ("Sans 10px"); + + text = new Text (this); + text->set_font_description (fd); + text->set_position (Duple (-_radius, _radius + 2)); + text->set_color (0xffffffff); + _bounding_box_dirty = true; +} + +Maschine2Knob::~Maschine2Knob () +{ +} + +void +Maschine2Knob::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const +{ + if (!_controllable) { + /* no controllable, nothing to draw */ + return; + } + + // TODO consider a "bar" circular shape + 1bit b/w is ugly + + const float scale = 2.f * _radius; + const float pointer_thickness = std::max (1.f, 3.f * (scale / 80.f)); + + const float start_angle = ((180.f - 65.f) * M_PI) / 180.f; + const float end_angle = ((360.f + 65.f) * M_PI) / 180.f; + + float zero = 0; + + const float value_angle = start_angle + (_val * (end_angle - start_angle)); + const float zero_angle = start_angle + (zero * (end_angle - start_angle)); + + float value_x = cos (value_angle); + float value_y = sin (value_angle); + + /* translate so that all coordinates are based on the center of the + * knob (which is also its position() + */ + context->save (); + Duple origin = item_to_window (Duple (0, 0)); + context->translate (origin.x - 0.5, origin.y - 0.5); + context->begin_new_path (); + + float center_radius = 0.48*scale; + float border_width = 0.8; + + const bool arc = true; + + if (arc) { + center_radius = scale * 0.33; + + float inner_progress_radius = scale * 0.38; + float outer_progress_radius = scale * 0.48; + float progress_width = (outer_progress_radius-inner_progress_radius); + float progress_radius = inner_progress_radius + progress_width/2.0; + + // draw the arc + context->set_source_rgb (1, 1, 1); + context->set_line_width (progress_width); + if (zero_angle > value_angle) { + context->arc (0, 0, progress_radius, value_angle, zero_angle); + } else { + context->arc (0, 0, progress_radius, zero_angle, value_angle); + } + context->stroke (); + } + + // knob body + context->set_line_width (border_width); + context->set_source_rgb (1, 1, 1); + context->arc (0, 0, center_radius, 0, 2.0*G_PI); + context->fill (); + + // line + context->set_source_rgb (0, 0, 0); + context->set_line_cap (Cairo::LINE_CAP_ROUND); + context->set_line_width (pointer_thickness); + context->move_to ((center_radius * value_x), (center_radius * value_y)); + context->line_to (((center_radius * 0.2) * value_x), ((center_radius * 0.2) * value_y)); + context->stroke (); + + /* reset all translations, scaling etc. */ + context->restore (); + + render_children (area, context); +} + + void +Maschine2Knob::compute_bounding_box () const +{ + if (!_canvas || _radius == 0) { + _bounding_box = Rect (); + _bounding_box_dirty = false; + return; + } + + if (_bounding_box_dirty) { + _bounding_box = Rect (- _radius, - _radius, _radius, _radius); + _bounding_box_dirty = false; + } + + add_child_bounding_boxes (); +} + +void +Maschine2Knob::set_controllable (boost::shared_ptr<AutomationControl> c) +{ + watch_connection.disconnect (); + + if (!c) { + _controllable.reset (); + return; + } + + _controllable = c; + _controllable->Changed.connect (watch_connection, invalidator(*this), boost::bind (&Maschine2Knob::controllable_changed, this), _eventloop); + + controllable_changed (); + // set _controllable->desc()->label +} + +void +Maschine2Knob::set_control (M2EncoderInterface* ctrl) +{ + encoder_connection.disconnect (); + _ctrl = ctrl; + if (!ctrl) { + return; + } + ctrl->changed.connect_same_thread (encoder_connection, boost::bind (&Maschine2Knob::encoder_changed, this, _1)); +} + +void +Maschine2Knob::encoder_changed (int delta) +{ + if (!_controllable) { + return; + } + const double d = delta * 0.5 / _ctrl->range (); + boost::shared_ptr<AutomationControl> ac = _controllable; + ac->set_value (ac->interface_to_internal (min (ac->upper(), max (ac->lower(), ac->internal_to_interface (ac->get_value()) + d))), PBD::Controllable::UseGroup); +} + +void +Maschine2Knob::controllable_changed () +{ + if (_controllable) { + _normal = _controllable->internal_to_interface (_controllable->normal()); + _val = _controllable->internal_to_interface (_controllable->get_value()); + + const ParameterDescriptor& desc (_controllable->desc()); + + char buf[64]; + switch (_controllable->parameter().type()) { + case ARDOUR::PanAzimuthAutomation: + snprintf (buf, sizeof (buf), _("L:%3d R:%3d"), (int) rint (100.0 * (1.0 - _val)), (int) rint (100.0 * _val)); + text->set (buf); + break; + + case ARDOUR::PanWidthAutomation: + snprintf (buf, sizeof (buf), "%d%%", (int) floor (_val*100)); + text->set (buf); + break; + + case ARDOUR::GainAutomation: + case ARDOUR::BusSendLevel: + case ARDOUR::TrimAutomation: + snprintf (buf, sizeof (buf), "%+4.1f dB", accurate_coefficient_to_dB (_controllable->get_value())); + text->set (buf); + break; + + default: + text->set (ARDOUR::value_as_string (desc, _val)); + break; + } + } else { + text->set ("---"); + } + + redraw (); +} |