1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2019-2020, William McPherson <willmcpherson2@gmail.com>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "MainWidget.h"
#include "KeysWidget.h"
#include "PlayerWidget.h"
#include "RollWidget.h"
#include "SamplerWidget.h"
#include "TrackControlsWidget.h"
#include "TrackManager.h"
#include "WaveWidget.h"
#include <LibGUI/Action.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Slider.h>
#include <LibGUI/StackWidget.h>
#include <LibGUI/TabWidget.h>
ErrorOr<NonnullRefPtr<MainWidget>> MainWidget::try_create(TrackManager& manager, AudioPlayerLoop& loop)
{
auto widget = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) MainWidget(manager, loop)));
TRY(widget->initialize());
return widget;
}
MainWidget::MainWidget(TrackManager& track_manager, AudioPlayerLoop& loop)
: m_track_manager(track_manager)
, m_audio_loop(loop)
{
}
ErrorOr<void> MainWidget::initialize()
{
TRY(try_set_layout<GUI::VerticalBoxLayout>(2, 2));
set_fill_with_background_color(true);
m_wave_widget = TRY(try_add<WaveWidget>(m_track_manager));
m_wave_widget->set_fixed_height(100);
m_tab_widget = TRY(try_add<GUI::TabWidget>());
m_roll_widget = TRY(m_tab_widget->try_add_tab<RollWidget>(TRY("Piano Roll"_string), m_track_manager));
m_roll_widget->set_fixed_height(300);
(void)TRY(m_tab_widget->try_add_tab<SamplerWidget>("Sampler"_short_string, m_track_manager));
m_player_widget = TRY(try_add<PlayerWidget>(m_track_manager, *this, m_audio_loop));
m_keys_and_knobs_container = TRY(try_add<GUI::Widget>());
TRY(m_keys_and_knobs_container->try_set_layout<GUI::HorizontalBoxLayout>(GUI::Margins {}, 2));
m_keys_and_knobs_container->set_fixed_height(130);
m_keys_and_knobs_container->set_fill_with_background_color(true);
m_keys_widget = TRY(m_keys_and_knobs_container->try_add<KeysWidget>(m_track_manager.keyboard()));
m_octave_container = TRY(m_keys_and_knobs_container->try_add<GUI::Widget>());
m_octave_container->set_preferred_width(GUI::SpecialDimension::Fit);
TRY(m_octave_container->try_set_layout<GUI::VerticalBoxLayout>());
auto octave_label = TRY(m_octave_container->try_add<GUI::Label>("Octave"_short_string));
octave_label->set_preferred_width(GUI::SpecialDimension::Fit);
m_octave_value = TRY(m_octave_container->try_add<GUI::Label>(TRY(String::number(m_track_manager.keyboard()->virtual_keyboard_octave()))));
m_octave_value->set_preferred_width(GUI::SpecialDimension::Fit);
// FIXME: Implement vertical flipping in GUI::Slider, not here.
m_octave_knob = TRY(m_octave_container->try_add<GUI::VerticalSlider>());
m_octave_knob->set_preferred_width(GUI::SpecialDimension::Fit);
m_octave_knob->set_tooltip("Z: octave down, X: octave up");
m_octave_knob->set_range(octave_min - 1, octave_max - 1);
m_octave_knob->set_value((octave_max - 1) - (m_track_manager.keyboard()->virtual_keyboard_octave() - 1));
m_octave_knob->set_step(1);
m_octave_knob->on_change = [this](int value) {
int new_octave = octave_max - value;
set_octave_via_slider(new_octave);
VERIFY(new_octave == m_track_manager.keyboard()->virtual_keyboard_octave());
m_octave_value->set_text(String::number(new_octave).release_value_but_fixme_should_propagate_errors());
};
m_knobs_widget = TRY(m_keys_and_knobs_container->try_add<GUI::StackWidget>());
for (auto track : m_track_manager.tracks())
TRY(m_track_controls.try_append(TRY(m_knobs_widget->try_add<TrackControlsWidget>(TRY(track->try_make_weak_ptr())))));
update_selected_track();
m_roll_widget->set_keys_widget(m_keys_widget);
return {};
}
ErrorOr<void> MainWidget::add_track_actions(GUI::Menu& menu)
{
TRY(menu.try_add_action(GUI::Action::create("&Add Track", { Mod_Ctrl, Key_T }, TRY(Gfx::Bitmap::load_from_file("/res/icons/16x16/plus.png"sv)), [&](auto&) {
m_player_widget->add_track();
})));
TRY(menu.try_add_action(GUI::Action::create("&Next Track", { Mod_Ctrl, Key_N }, TRY(Gfx::Bitmap::load_from_file("/res/icons/16x16/go-last.png"sv)), [&](auto&) {
turn_off_pressed_keys();
m_player_widget->next_track();
turn_on_pressed_keys();
})));
return {};
}
void MainWidget::update_selected_track()
{
if (static_cast<size_t>(m_track_manager.track_count()) > m_track_controls.size())
MUST(add_controls_for_current_track());
m_knobs_widget->set_active_widget(m_track_controls.at(m_track_manager.current_track_index()).ptr());
}
ErrorOr<void> MainWidget::add_controls_for_current_track()
{
auto track = m_track_manager.current_track();
TRY(m_track_controls.try_append(TRY(m_knobs_widget->try_add<TrackControlsWidget>(TRY(track->try_make_weak_ptr())))));
return {};
}
// FIXME: There are some unnecessary calls to update() throughout this program,
// which are an easy target for optimization.
void MainWidget::custom_event(Core::CustomEvent&)
{
m_wave_widget->update();
m_roll_widget->update();
}
void MainWidget::keydown_event(GUI::KeyEvent& event)
{
if (!event.alt() && !event.ctrl() && !event.shift()) {
// This is to stop held-down keys from creating multiple events.
if (m_keys_pressed[event.key()])
return;
m_keys_pressed[event.key()] = true;
bool event_was_accepted = false;
if (note_key_action(event.key(), DSP::Keyboard::Switch::On))
event_was_accepted = true;
if (special_key_action(event.key()))
event_was_accepted = true;
if (!event_was_accepted)
event.ignore();
} else {
event.ignore();
}
m_keys_widget->update();
}
void MainWidget::keyup_event(GUI::KeyEvent& event)
{
m_keys_pressed[event.key()] = false;
note_key_action(event.key(), DSP::Keyboard::Switch::Off);
m_keys_widget->update();
}
bool MainWidget::note_key_action(int key_code, DSP::Keyboard::Switch switch_note)
{
auto key = m_keys_widget->key_code_to_key(key_code);
if (key == -1)
return false;
m_track_manager.keyboard()->set_keyboard_note_in_active_octave(key, switch_note);
return true;
}
bool MainWidget::special_key_action(int key_code)
{
switch (key_code) {
case Key_Z:
change_octave_via_keys(DSP::Keyboard::Direction::Down);
return true;
case Key_X:
change_octave_via_keys(DSP::Keyboard::Direction::Up);
return true;
case Key_Space:
m_player_widget->toggle_paused();
return true;
}
return false;
}
void MainWidget::turn_off_pressed_keys()
{
if (m_keys_widget->mouse_note() != -1)
m_track_manager.keyboard()->set_keyboard_note_in_active_octave(m_keys_widget->mouse_note(), DSP::Keyboard::Switch::Off);
for (int i = 0; i < key_code_count; ++i) {
if (m_keys_pressed[i])
note_key_action(i, DSP::Keyboard::Switch::Off);
}
}
void MainWidget::turn_on_pressed_keys()
{
if (m_keys_widget->mouse_note() != -1)
m_track_manager.keyboard()->set_keyboard_note_in_active_octave(m_keys_widget->mouse_note(), DSP::Keyboard::Switch::On);
for (int i = 0; i < key_code_count; ++i) {
if (m_keys_pressed[i])
note_key_action(i, DSP::Keyboard::Switch::On);
}
}
void MainWidget::set_octave_via_slider(int octave)
{
turn_off_pressed_keys();
MUST(m_track_manager.keyboard()->set_virtual_keyboard_octave(octave));
turn_on_pressed_keys();
m_keys_widget->update();
}
void MainWidget::change_octave_via_keys(DSP::Keyboard::Direction direction)
{
turn_off_pressed_keys();
m_track_manager.keyboard()->change_virtual_keyboard_octave(direction);
turn_on_pressed_keys();
m_octave_knob->set_value(octave_max - m_track_manager.keyboard()->virtual_keyboard_octave());
m_keys_widget->update();
}
|
