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livetrax/libs/surfaces/maschine2/ui_menu.cc

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/*
* 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 of the License, or
* (at your option) any later version.
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*
* 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.
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*/
#include <cairomm/context.h>
#include <cairomm/surface.h>
#include <cairomm/region.h>
#include <pangomm/layout.h>
#include "gtkmm2ext/colors.h"
#include "canvas/text.h"
#include "canvas/types.h"
#include "canvas/rectangle.h"
#include "maschine2.h"
#include "m2controls.h"
#include "canvas.h"
#include "ui_menu.h"
#include "pbd/i18n.h"
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#ifdef __APPLE__
#define Rect ArdourCanvas::Rect
#endif
using namespace ARDOUR;
using namespace std;
using namespace PBD;
using namespace Glib;
using namespace ArdourSurface;
using namespace ArdourCanvas;
Maschine2Menu::Maschine2Menu (PBD::EventLoop* el, Item* parent, const std::vector<std::string>& s, double width)
: Container (parent)
, _ctrl (0)
, _eventloop (el)
, _baseline (-1)
, _height (-1)
, _width (width)
, _active (0)
, _wrap (false)
, _first (0)
, _last (0)
, _rotary (0)
{
Pango::FontDescription fd ("Sans 10px");
Maschine2Canvas* m2c = dynamic_cast<Maschine2Canvas*> (canvas());
Glib::RefPtr<Pango::Layout> throwaway = Pango::Layout::create (m2c->image_context());
throwaway->set_font_description (fd);
throwaway->set_text (X_("Hg")); /* ascender + descender) */
int h, w;
throwaway->get_pixel_size (w, h);
_baseline = ceil(h);
_height = m2c->height();
_active_bg = new ArdourCanvas::Rectangle (this);
_active_bg->set_fill_color (0xffffffff);
for (vector<string>::const_iterator i = s.begin(); i != s.end(); ++i) {
Text* t = new Text (this);
t->set_font_description (fd);
t->set_color (0xffffffff);
t->set (*i);
_displays.push_back (t);
}
rearrange (0);
}
Maschine2Menu::~Maschine2Menu ()
{
}
void
Maschine2Menu::rearrange (uint32_t initial_display)
{
vector<Text*>::iterator i = _displays.begin();
Duple origin = item_to_window (Duple (0, 0));
for (uint32_t n = 0; n < initial_display; ++n) {
(*i)->hide ();
++i;
}
uint32_t index = initial_display;
uint32_t row = 0;
bool active_shown = false;
_first = _last = index;
while (i != _displays.end()) {
Coord y = row * _baseline;
if (y + _baseline + origin.y > _height) {
break;
}
(*i)->set_position (Duple (2, y));
if (index == _active) {
(*i)->set_color (0x000000ff);
active_shown = true;
_active_bg->set (Rect (0, y - 1, 64, y - 1 + _baseline));
_active_bg->show ();
} else {
(*i)->set_color (0xffffffff);
}
_last = index;
(*i)->show ();
++i;
++index;
++row;
}
while (i != _displays.end()) {
(*i)->hide ();
++i;
}
if (!active_shown) {
_active_bg->hide ();
}
}
void
Maschine2Menu::render (Rect const& area, Cairo::RefPtr<Cairo::Context> context) const
{
context->save ();
Duple origin = item_to_window (Duple (0, 0));
context->rectangle (origin.x, origin.y, _width, _height);
context->clip ();
render_children (area, context);
context->restore ();
}
void
Maschine2Menu::set_active (uint32_t a)
{
if (a == _active || a > items ()) {
return;
}
_active = a;
if (_active < _first) {
rearrange (_active);
}
else if (_active > _last) {
rearrange (_active - _last);
} else {
rearrange (_first);
}
redraw ();
}
void
Maschine2Menu::set_wrap (bool b)
{
if (b == _wrap) {
return;
}
_wrap = b;
}
void
Maschine2Menu::set_control (M2EncoderInterface* ctrl)
{
encoder_connection.disconnect ();
_ctrl = ctrl;
if (!ctrl) {
return;
}
ctrl->changed.connect_same_thread (encoder_connection, boost::bind (&Maschine2Menu::encoder_changed, this, _1));
}
void
Maschine2Menu::encoder_changed (int delta)
{
assert (_ctrl);
if (items() == 0) {
return;
}
double d = delta * 8. / _ctrl->range ();
d = fmodf (d, items());
if (_wrap) {
_rotary = fmodf (items () + _rotary + d, items());
} else {
_rotary += + d;
if (_rotary < 0) { _rotary = 0; }
if (_rotary >= items ()) { _rotary = items () - 1; }
}
uint32_t a = floor (_rotary);
if (a == _active) {
return;
}
set_active (a);
ActiveChanged (); /* EMIT SIGNAL */
}