ardour/gtk2_ardour/ardour_button.cc

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/*
Copyright (C) 2010 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 <iostream>
#include <cmath>
#include <algorithm>
#include <pangomm/layout.h>
#include "pbd/compose.h"
#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/rgb_macros.h"
#include "ardour_button.h"
#include "ardour_ui.h"
#include "global_signals.h"
using namespace Gdk;
using namespace Gtk;
using namespace Glib;
using std::max;
using std::min;
ArdourButton::ArdourButton()
: _text_width (0)
, _text_height (0)
, _led_left (false)
, _diameter (0.0)
, _fixed_diameter (false)
, _distinct_led_click (true)
, edge_pattern (0)
, fill_pattern (0)
, led_inset_pattern (0)
, reflection_pattern (0)
{
ColorsChanged.connect (sigc::mem_fun (*this, &ArdourButton::color_handler));
StateChanged.connect (sigc::mem_fun (*this, &ArdourButton::state_handler));
}
ArdourButton::~ArdourButton()
{
}
void
ArdourButton::set_text (const std::string& str)
{
_text = str;
if (!_layout && !_text.empty()) {
_layout = Pango::Layout::create (get_pango_context());
}
_layout->set_text (str);
queue_resize ();
}
void
ArdourButton::set_markup (const std::string& str)
{
_text = str;
if (!_layout) {
_layout = Pango::Layout::create (get_pango_context());
}
_layout->set_text (str);
queue_resize ();
}
void
ArdourButton::render (cairo_t* cr)
{
if (!_fixed_diameter) {
_diameter = std::min (_width, _height);
}
/* background fill. use parent window style, so that we fit in nicely.
*/
Color c = get_parent_bg ();
cairo_rectangle (cr, 0, 0, _width, _height);
cairo_stroke_preserve (cr);
cairo_set_source_rgb (cr, c.get_red_p(), c.get_green_p(), c.get_blue_p());
cairo_fill (cr);
/* edge */
Gtkmm2ext::rounded_rectangle (cr, 0, 0, _width, _height, 9);
cairo_set_source (cr, edge_pattern);
cairo_fill (cr);
/* button itself: leaves 1 pixel border of the edge visible all around. */
Gtkmm2ext::rounded_rectangle (cr, 1, 1, _width-2, _height-2, 9);
cairo_set_source (cr, fill_pattern);
cairo_fill (cr);
/* text, if any */
if (!_text.empty()) {
cairo_set_source_rgba (cr, text_r, text_g, text_b, text_a);
if (_led_left) {
cairo_move_to (cr, _diameter + 3 + 4, _height/2.0 - _text_height/2.0);
} else {
cairo_move_to (cr, 3, _height/2.0 - _text_height/2.0);
}
pango_cairo_show_layout (cr, _layout->gobj());
}
/* move to the center of the ArdourButton itself */
if (_led_left) {
cairo_translate (cr, 3 + (_diameter/2.0), _height/2.0);
} else {
cairo_translate (cr, _width - ((_diameter/2.0) + 4.0), _height/2.0);
}
//inset
cairo_arc (cr, 0, 0, _diameter/2, 0, 2 * M_PI);
cairo_set_source (cr, led_inset_pattern);
cairo_fill (cr);
//black ring
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_arc (cr, 0, 0, _diameter/2-2, 0, 2 * M_PI);
cairo_fill(cr);
//led color
cairo_set_source_rgba (cr, led_r, led_g, led_b, led_a);
cairo_arc (cr, 0, 0, _diameter/2-3, 0, 2 * M_PI);
cairo_fill(cr);
//reflection
cairo_scale(cr, 0.7, 0.7);
cairo_arc (cr, 0, 0, _diameter/2-3, 0, 2 * M_PI);
cairo_set_source (cr, reflection_pattern);
cairo_fill (cr);
cairo_stroke (cr); // ??
}
void
ArdourButton::state_handler ()
{
set_colors ();
}
void
ArdourButton::set_diameter (float d)
{
_diameter = (d*2) + 5.0;
if (_diameter != 0.0) {
_fixed_diameter = true;
}
set_dirty ();
}
void
ArdourButton::on_realize ()
{
set_colors ();
CairoWidget::on_realize ();
}
void
ArdourButton::on_size_request (Gtk::Requisition* req)
{
int xpad = 0;
int ypad = 6;
if (!_text.empty()) {
_layout->get_pixel_size (_text_width, _text_height);
xpad += 6;
}
if (_fixed_diameter) {
req->width = _text_width + (int) _diameter + xpad;
req->height = max (_text_height, (int) _diameter) + ypad;
} else {
CairoWidget::on_size_request (req);
}
}
void
ArdourButton::set_colors ()
{
uint32_t start_color;
uint32_t end_color;
uint32_t r, g, b, a;
uint32_t text_color;
uint32_t led_color;
/* we use the edge of the button to show Selected state, so the
* color/pattern used there will vary depending on that
*/
if (edge_pattern) {
cairo_pattern_destroy (edge_pattern);
}
edge_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _height);
if (visual_state() & CairoWidget::Selected) {
start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border start selected", get_name()));
end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border end selected", get_name()));
} else {
start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border start", get_name()));
end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 border end", get_name()));
}
UINT_TO_RGBA (start_color, &r, &g, &b, &a);
cairo_pattern_add_color_stop_rgba (edge_pattern, 0, r/255.0,g/255.0,b/255.0, 0.7);
UINT_TO_RGBA (end_color, &r, &g, &b, &a);
cairo_pattern_add_color_stop_rgba (edge_pattern, 1, r/255.0,g/255.0,b/255.0, 0.7);
/* the fill pattern is used to indicate Normal/Active/Mid state
*/
if (fill_pattern) {
cairo_pattern_destroy (fill_pattern);
}
fill_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _height);
if (active_state() == Mid) {
start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill start mid", get_name()));
end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill end mid", get_name()));
} else if (active_state() == Active) {
start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill start active", get_name()));
end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill end active", get_name()));
} else {
start_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill start", get_name()));
end_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 fill end", get_name()));
}
UINT_TO_RGBA (start_color, &r, &g, &b, &a);
cairo_pattern_add_color_stop_rgba (fill_pattern, 0, r/255.0,g/255.0,b/255.0, a/255.0);
UINT_TO_RGBA (end_color, &r, &g, &b, &a);
cairo_pattern_add_color_stop_rgba (fill_pattern, 1, r/255.0,g/255.0,b/255.0, a/255.0);
if (led_inset_pattern) {
cairo_pattern_destroy (led_inset_pattern);
}
led_inset_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _diameter);
cairo_pattern_add_color_stop_rgba (led_inset_pattern, 0, 0,0,0, 0.4);
cairo_pattern_add_color_stop_rgba (led_inset_pattern, 1, 1,1,1, 0.7);
if (reflection_pattern) {
cairo_pattern_destroy (reflection_pattern);
}
reflection_pattern = cairo_pattern_create_linear (0.0, 0.0, 0.0, _diameter/2-3);
cairo_pattern_add_color_stop_rgba (reflection_pattern, 0, 1,1,1, active_state() ? 0.4 : 0.2);
cairo_pattern_add_color_stop_rgba (reflection_pattern, 1, 1,1,1, 0.0);
/* text and LED colors depend on Active/Normal/Mid */
if (active_state() == Active) {
text_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 text active", get_name()));
led_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 led active", get_name()));
} else if (active_state() == Mid) {
text_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 text mid", get_name()));
led_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 led active", get_name()));
} else {
text_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 text", get_name()));
led_color = ARDOUR_UI::config()->color_by_name (string_compose ("%1 led", get_name()));
}
UINT_TO_RGBA (text_color, &r, &g, &b, &a);
text_r = r/255.0;
text_g = g/255.0;
text_b = b/255.0;
text_a = a/255.0;
UINT_TO_RGBA (led_color, &r, &g, &b, &a);
led_r = r/255.0;
led_g = g/255.0;
led_b = b/255.0;
led_a = a/255.0;
set_dirty ();
}
void
ArdourButton::set_led_left (bool yn)
{
_led_left = yn;
}
bool
ArdourButton::on_button_press_event (GdkEventButton *ev)
{
if (_distinct_led_click) {
/* if within LED, swallow event */
int top = lrint (_height/2.0 - _diameter/2.0);
int bottom = lrint (_height/2.0 + _diameter/2.0);
int left;
int right;
if (_led_left) {
left = 4;
right = left + _diameter;
} else {
left = lrint (_width - 4 - _diameter/2.0);
right = left + _diameter;
}
if (ev->x >= left && ev->x <= right && ev->y <= bottom && ev->y >= top) {
return true;
}
}
return false;
}
bool
ArdourButton::on_button_release_event (GdkEventButton *ev)
{
if (_distinct_led_click) {
/* if within LED, emit signal */
int top = lrint (_height/2.0 - _diameter/2.0);
int bottom = lrint (_height/2.0 + _diameter/2.0);
int left;
int right;
if (_led_left) {
left = 4;
right = left + _diameter;
} else {
left = lrint (_width - 4 - _diameter/2.0);
right = left + _diameter;
}
if (ev->x >= left && ev->x <= right && ev->y <= bottom && ev->y >= top) {
signal_clicked(); /* EMIT SIGNAL */
return true;
}
}
return false;
}
void
ArdourButton::set_distinct_led_click (bool yn)
{
_distinct_led_click = yn;
}
void
ArdourButton::color_handler ()
{
set_colors ();
set_dirty ();
}