13
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livetrax/libs/surfaces/push2/menu.cc

219 lines
4.3 KiB
C++

/*
Copyright (C) 2016 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 <cairomm/context.h>
#include <cairomm/surface.h>
#include <pangomm/layout.h>
#include "push2.h"
#include "gui.h"
using namespace ARDOUR;
using namespace std;
using namespace PBD;
using namespace Glib;
using namespace ArdourSurface;
#include "pbd/i18n.h"
#include "menu.h"
Push2Menu::Push2Menu (Cairo::RefPtr<Cairo::Context> context)
: _dirty (true)
{
Pango::FontDescription fd2 ("Sans 10");
{
Glib::RefPtr<Pango::Layout> throwaway = Pango::Layout::create (context);
throwaway->set_font_description (fd2);
throwaway->set_text (X_("Hg")); /* ascender + descender) */
int h, w;
throwaway->get_pixel_size (w, h);
baseline = h;
nrows = Push2::rows / baseline;
}
for (int n = 0; n < 8; ++n) {
columns[n].layout = Pango::Layout::create (context);
columns[n].layout->set_font_description (fd2);
columns[n].top = -1;
columns[n].active = -1;
}
}
void
Push2Menu::fill_column (int col, vector<string> v)
{
if (col < 0 || col > 7) {
return;
}
columns[col].text = v;
if (v.empty()) {
columns[col].active = -1;
} else {
columns[col].active = 0;
}
set_text (col, 0);
_dirty = true;
}
void
Push2Menu::set_text (int col, int top_row)
{
if (top_row > (int) columns[col].text.size() - nrows || top_row < 0) {
return;
}
if (top_row == columns[col].top) {
return;
}
vector<string>::iterator s = columns[col].text.begin();
s += top_row;
string rows;
while (true) {
rows += *s;
++s;
if (s != columns[col].text.end()) {
rows += '\n';
} else {
break;
}
}
columns[col].layout->set_text (rows);
columns[col].top = top_row;
_dirty = true;
}
void
Push2Menu::scroll (int col, int dir)
{
if (dir > 0) {
set_text (col, columns[col].top + 1);
} else {
set_text (col, columns[col].top - 1);
}
}
void
Push2Menu::set_active (int col, int index)
{
if (col < 0 || col > 7) {
return;
}
if (index < 0 || index > (int) columns[col].text.size()) {
return;
}
columns[col].active = index;
ActiveChanged (); /* emit signal */
_dirty = true;
}
void
Push2Menu::step_active (int col, int dir)
{
if (col < 0 || col > 7) {
return;
}
if (columns[col].text.empty()) {
return;
}
if (dir < 0) {
if (columns[col].active == -1) {
columns[col].active = 0;
} else {
columns[col].active = columns[col].active - 1;
if (columns[col].active < 0) {
columns[col].active = columns[col].text.size() - 1;
}
}
} else {
if (columns[col].active == -1) {
columns[col].active = 0;
} else {
columns[col].active = columns[col].active + 1;
if (columns[col].active >= (int) columns[col].text.size()) {
columns[col].active = 0;
}
}
}
if (columns[col].active < nrows/2) {
set_text (col, 0);
} else {
set_text (col, columns[col].active - (nrows/2) + 1);
}
_dirty = true;
}
int
Push2Menu::get_active (int col)
{
if (col < 0 || col > 7) {
return -1;
}
return columns[col].active;
}
void
Push2Menu::redraw (Cairo::RefPtr<Cairo::Context> context, bool force) const
{
for (int n = 0; n < 8; ++n) {
/* Active: move to column/now, draw background indicator
for active row.
*/
const double x = 10.0 + (n * 120.0);
const double y = 2.0;
if (columns[n].active >= 0) {
int effective_row = columns[n].active - columns[n].top;
context->rectangle (x, y + (effective_row * baseline), 120.0, baseline);
context->set_source_rgb (1.0, 1.0, 1.0);
context->fill ();
}
/* now draw all the text, in one go */
context->move_to (x, y);
context->set_source_rgb (0.23, 0.0, 0.349);
columns[n].layout->update_from_cairo_context (context);
columns[n].layout->show_in_cairo_context (context);
}
_dirty = false;
}