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livetrax/libs/surfaces/push2/menu.cc

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/*
* Copyright (C) 2016-2018 Robin Gareus <robin@gareus.org>
* Copyright (C) 2016 Paul Davis <paul@linuxaudiosystems.com>
*
* 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 <cairomm/context.h>
#include <cairomm/surface.h>
#include <cairomm/region.h>
#include <pangomm/layout.h>
#include "canvas/text.h"
#include "canvas/types.h"
#include "canvas/rectangle.h"
#include "gtkmm2ext/colors.h"
#include "canvas.h"
#include "gui.h"
#include "push2.h"
#include "menu.h"
#include "pbd/i18n.h"
#ifdef __APPLE__
#define Rect ArdourCanvas::Rect
#endif
using namespace ARDOUR;
using namespace PBD;
using namespace Glib;
using namespace ArdourSurface;
using namespace ArdourCanvas;
Push2Menu::Push2Menu (Item* parent, std::vector<std::string> s)
: Container (parent)
, _baseline (-1)
, _ncols (0)
, _nrows (0)
, _wrap (true)
, _first (0)
, _last (0)
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, _active (0)
{
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Pango::FontDescription fd ("Sans 10");
if (_baseline < 0) {
Push2Canvas* p2c = dynamic_cast<Push2Canvas*> (canvas());
Glib::RefPtr<Pango::Layout> throwaway = Pango::Layout::create (p2c->get_pango_context());
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throwaway->set_font_description (fd);
throwaway->set_text (X_("Hg")); /* ascender + descender) */
int h, w;
throwaway->get_pixel_size (w, h);
_baseline = h;
}
_active_bg = new ArdourCanvas::Rectangle (this);
for (std::vector<std::string>::iterator si = s.begin(); si != s.end(); ++si) {
Text* t = new Text (this);
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t->set_font_description (fd);
t->set (*si);
_displays.push_back (t);
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}
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}
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void
Push2Menu::set_layout (int c, int r)
{
_ncols = c;
_nrows = r;
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set_active (_active);
rearrange (_active);
}
void
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Push2Menu::rearrange (uint32_t initial_display)
{
if (initial_display >= _displays.size()) {
return;
}
std::vector<Text*>::iterator i = _displays.begin();
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/* move to first */
for (uint32_t n = 0; n < initial_display; ++n) {
(*i)->hide ();
++i;
}
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uint32_t index = initial_display;
uint32_t col = 0;
uint32_t row = 0;
bool active_shown = false;
while (i != _displays.end()) {
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Coord x = col * Push2Canvas::inter_button_spacing();
Coord y = row * _baseline;
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(*i)->set_position (Duple (x, y));
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if (index == _active) {
_active_bg->set (Rect (x - 1,
y - 1,
x - 1 + Push2Canvas::inter_button_spacing (),
y - 1 + _baseline));
_active_bg->show ();
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active_shown = true;
}
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(*i)->show ();
_last = index;
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++i;
++index;
if (++row >= _nrows) {
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row = 0;
if (++col >= _ncols) {
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/* no more to display */
break;
}
}
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}
while (i != _displays.end()) {
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(*i)->hide ();
++i;
}
if (!active_shown) {
_active_bg->hide ();
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}
_first = initial_display;
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Rearranged (); /* EMIT SIGNAL */
}
void
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Push2Menu::scroll (Direction dir, bool page)
{
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switch (dir) {
case DirectionUp:
if (_active == 0) {
if (_wrap) {
set_active (_displays.size() - 1);
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}
} else {
set_active (_active - 1);
}
break;
case DirectionDown:
if (_active == _displays.size() - 1) {
if (_wrap) {
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set_active (0);
}
} else {
set_active (_active + 1);
}
break;
case DirectionLeft:
if (page) {
set_active (std::max (0, (int) (_first - (_nrows * _ncols))));
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} else {
if (_active / _nrows == 0) {
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/* in the first column, go to last column, same row */
if (_wrap) {
set_active (_displays.size() - 1 - active_row ());
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}
} else {
/* move to same row, previous column */
set_active (_active - _nrows);
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}
}
break;
case DirectionRight:
if (page) {
set_active (std::min ((uint32_t) _displays.size(), _first + (_nrows * _ncols)));
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} else {
if (_active / _nrows == _ncols) {
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/* in the last column, go to same row in first column */
if (_wrap) {
set_active (active_row());
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}
} else {
/* move to same row, next column */
set_active (_active + _nrows);
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}
}
break;
}
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}
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void
Push2Menu::render (Rect const& area, Cairo::RefPtr<Cairo::Context> context) const
{
render_children (area, context);
}
void
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Push2Menu::set_active (uint32_t index)
{
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if (!parent() || (index == _active)) {
return;
}
if (index >= _displays.size()) {
_active_bg->hide ();
return;
}
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/* set text color for old active item, and the new one */
if (_active < _displays.size()) {
_displays[_active]->set_color (_text_color);
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}
_displays[index]->set_color (_contrast_color);
Duple p = _displays[index]->position ();
_active_bg->set (Rect (p.x - 1, p.y - 1, p.x - 1 + Push2Canvas::inter_button_spacing(), p.y - 1 + _baseline ));
_active_bg->show ();
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_active = index;
if (_active < _first) {
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/* we jumped before current visible range : try to put its column first
*/
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rearrange (active_top());
} else if (_active > _last) {
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/* we jumped after current visible range : try putting its
* column last
*/
rearrange (active_top() - ((_ncols - 1) * _nrows));
}
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ActiveChanged (); /* EMIT SIGNAL */
}
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void
Push2Menu::set_text_color (Gtkmm2ext::Color c)
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{
_text_color = c;
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for (std::vector<Text*>::iterator t = _displays.begin(); t != _displays.end(); ++t) {
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(*t)->set_color (c);
}
}
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void
Push2Menu::set_active_color (Gtkmm2ext::Color c)
{
_active_color = c;
_contrast_color = Gtkmm2ext::contrasting_text_color (_active_color);
if (_active_bg) {
_active_bg->set_fill_color (c);
}
if (_active < _displays.size()) {
_displays[_active]->set_color (_contrast_color);
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}
}
void
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Push2Menu::set_font_description (Pango::FontDescription fd)
{
_font_description = fd;
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for (std::vector<Text*>::iterator t = _displays.begin(); t != _displays.end(); ++t) {
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(*t)->set_font_description (fd);
}
}