1 /* abGate - LV2 Noise Gate Plugin
2 *
3 * Copyright 2011 Antanas Bružas
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 3 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 #include "toggle.h"
21
22 using namespace std;
23
toggle(const sigc::slot<void> toggle_slot)24 toggle::toggle(const sigc::slot<void> toggle_slot) :
25 a_tog(new Adjustment(0, 0, 1, 1, 1, 0)) {
26
27 set_events(Gdk::EXPOSURE_MASK | Gdk::BUTTON_PRESS_MASK | Gdk::BUTTON_RELEASE_MASK);
28 set_double_buffered(true);
29
30 // Setting bypass images
31 on = Gdk::Pixbuf::create_from_file(BYPASS_ON_PNG);
32 off = Gdk::Pixbuf::create_from_file(BYPASS_OFF_PNG);
33 pixbuf = off;
34
35 connecting(a_tog, toggle_slot);
36 set_size_request(100, 100);
37 }
38
~toggle()39 toggle::~toggle() {
40 }
41
connecting(Adjustment * tog,const sigc::slot<void> slot)42 void toggle::connecting(Adjustment* tog, const sigc::slot<void> slot) {
43 a_tog = tog;
44
45 // Triggering value_changed method when value of the toggle changes
46 a_tog->signal_value_changed().connect(mem_fun(*this, &toggle::value_changed));
47
48 // Updating LV2 port value when value of bypass changes
49 a_tog->signal_value_changed().connect(slot);
50 }
51
value_changed()52 void toggle::value_changed() {
53
54 // Setting bypass value to either 1 or 0
55 float value = a_tog->get_value() > 0 ? 1 : 0;
56
57 // Changing the image of the toggle
58 pixbuf = value > 0 ? on : off;
59
60 // Also can be used like this: dis_sig.emit()
61 dis_sig();
62 }
63
on_expose_event(GdkEventExpose * event)64 bool toggle::on_expose_event(GdkEventExpose *event) {
65
66 if (event && pixbuf) {
67 // Drawing new pixbuf
68 m_drawable = get_window();
69 m_drawable->draw_pixbuf(get_style()->get_black_gc(), pixbuf, get_width(), -1, 0, 0, get_width(), get_height(), Gdk::RGB_DITHER_NONE, 0, 0);
70 // This one is deprecated: pixbuf->render_to_drawable(get_window(), get_style()->get_black_gc(), get_width(), -1, 0, 0, get_width(), get_height(), Gdk::RGB_DITHER_NONE, 0, 0);
71 }
72 return true;
73 }
74
on_button_press_event(GdkEventButton * event)75 bool toggle::on_button_press_event(GdkEventButton *event) {
76
77 // Updating bypass value
78 float value = a_tog->get_value() > 0 ? 0 : 1;
79 a_tog->set_value(value);
80 return true;
81 }
82
on_button_release_event(GdkEventButton * event)83 bool toggle::on_button_release_event(GdkEventButton *event) {
84 if (has_grab()) {
85 remove_modal_grab();
86 }
87 return true;
88 }
89
90 // Returns bypass value
get_toggle_value()91 float toggle::get_toggle_value() {
92 return a_tog->get_value();
93 }
94
95 // Sets bypass value
set_toggle_value(float value)96 void toggle::set_toggle_value(float value) {
97 a_tog->set_value(value);
98 }
99