mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 23:37:35 +00:00
Applications: Move to Userland/Applications/
This commit is contained in:
parent
aa939c4b4b
commit
dc28c07fa5
287 changed files with 1 additions and 1 deletions
328
Userland/Applications/Piano/KeysWidget.cpp
Normal file
328
Userland/Applications/Piano/KeysWidget.cpp
Normal file
|
@ -0,0 +1,328 @@
|
|||
/*
|
||||
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
||||
* Copyright (c) 2019-2020, William McPherson <willmcpherson2@gmail.com>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
||||
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||||
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
||||
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include "KeysWidget.h"
|
||||
#include "TrackManager.h"
|
||||
#include <LibGUI/Painter.h>
|
||||
|
||||
KeysWidget::KeysWidget(TrackManager& track_manager)
|
||||
: m_track_manager(track_manager)
|
||||
{
|
||||
set_fill_with_background_color(true);
|
||||
}
|
||||
|
||||
KeysWidget::~KeysWidget()
|
||||
{
|
||||
}
|
||||
|
||||
int KeysWidget::mouse_note() const
|
||||
{
|
||||
if (m_mouse_down && m_mouse_note + m_track_manager.octave_base() < note_count)
|
||||
return m_mouse_note; // Can be -1.
|
||||
else
|
||||
return -1;
|
||||
}
|
||||
|
||||
void KeysWidget::set_key(int key, Switch switch_key)
|
||||
{
|
||||
if (key == -1 || key + m_track_manager.octave_base() >= note_count)
|
||||
return;
|
||||
|
||||
if (switch_key == On) {
|
||||
++m_key_on[key];
|
||||
} else {
|
||||
if (m_key_on[key] >= 1)
|
||||
--m_key_on[key];
|
||||
}
|
||||
ASSERT(m_key_on[key] <= 2);
|
||||
|
||||
m_track_manager.set_note_current_octave(key, switch_key);
|
||||
}
|
||||
|
||||
bool KeysWidget::note_is_set(int note) const
|
||||
{
|
||||
if (note < m_track_manager.octave_base())
|
||||
return false;
|
||||
|
||||
if (note >= m_track_manager.octave_base() + note_count)
|
||||
return false;
|
||||
|
||||
return m_key_on[note - m_track_manager.octave_base()] != 0;
|
||||
}
|
||||
|
||||
int KeysWidget::key_code_to_key(int key_code) const
|
||||
{
|
||||
switch (key_code) {
|
||||
case Key_A:
|
||||
return 0;
|
||||
case Key_W:
|
||||
return 1;
|
||||
case Key_S:
|
||||
return 2;
|
||||
case Key_E:
|
||||
return 3;
|
||||
case Key_D:
|
||||
return 4;
|
||||
case Key_F:
|
||||
return 5;
|
||||
case Key_T:
|
||||
return 6;
|
||||
case Key_G:
|
||||
return 7;
|
||||
case Key_Y:
|
||||
return 8;
|
||||
case Key_H:
|
||||
return 9;
|
||||
case Key_U:
|
||||
return 10;
|
||||
case Key_J:
|
||||
return 11;
|
||||
case Key_K:
|
||||
return 12;
|
||||
case Key_O:
|
||||
return 13;
|
||||
case Key_L:
|
||||
return 14;
|
||||
case Key_P:
|
||||
return 15;
|
||||
case Key_Semicolon:
|
||||
return 16;
|
||||
case Key_Apostrophe:
|
||||
return 17;
|
||||
case Key_RightBracket:
|
||||
return 18;
|
||||
case Key_Return:
|
||||
return 19;
|
||||
default:
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
constexpr int white_key_width = 24;
|
||||
constexpr int black_key_width = 16;
|
||||
constexpr int black_key_x_offset = black_key_width / 2;
|
||||
constexpr int black_key_height = 60;
|
||||
|
||||
constexpr char white_key_labels[] = {
|
||||
'A',
|
||||
'S',
|
||||
'D',
|
||||
'F',
|
||||
'G',
|
||||
'H',
|
||||
'J',
|
||||
'K',
|
||||
'L',
|
||||
';',
|
||||
'\'',
|
||||
'r',
|
||||
};
|
||||
constexpr int white_key_labels_count = sizeof(white_key_labels) / sizeof(char);
|
||||
|
||||
constexpr char black_key_labels[] = {
|
||||
'W',
|
||||
'E',
|
||||
'T',
|
||||
'Y',
|
||||
'U',
|
||||
'O',
|
||||
'P',
|
||||
']',
|
||||
};
|
||||
constexpr int black_key_labels_count = sizeof(black_key_labels) / sizeof(char);
|
||||
|
||||
constexpr int black_key_offsets[] = {
|
||||
white_key_width,
|
||||
white_key_width * 2,
|
||||
white_key_width,
|
||||
white_key_width,
|
||||
white_key_width * 2,
|
||||
};
|
||||
|
||||
constexpr int white_key_note_accumulator[] = {
|
||||
2,
|
||||
2,
|
||||
1,
|
||||
2,
|
||||
2,
|
||||
2,
|
||||
1,
|
||||
};
|
||||
|
||||
constexpr int black_key_note_accumulator[] = {
|
||||
2,
|
||||
3,
|
||||
2,
|
||||
2,
|
||||
3,
|
||||
};
|
||||
|
||||
void KeysWidget::paint_event(GUI::PaintEvent& event)
|
||||
{
|
||||
GUI::Painter painter(*this);
|
||||
painter.translate(frame_thickness(), frame_thickness());
|
||||
|
||||
int note = 0;
|
||||
int x = 0;
|
||||
int i = 0;
|
||||
for (;;) {
|
||||
Gfx::IntRect rect(x, 0, white_key_width, frame_inner_rect().height());
|
||||
painter.fill_rect(rect, m_key_on[note] ? note_pressed_color : Color::White);
|
||||
painter.draw_rect(rect, Color::Black);
|
||||
if (i < white_key_labels_count) {
|
||||
rect.set_height(rect.height() * 1.5);
|
||||
painter.draw_text(rect, StringView(&white_key_labels[i], 1), Gfx::TextAlignment::Center, Color::Black);
|
||||
}
|
||||
|
||||
note += white_key_note_accumulator[i % white_keys_per_octave];
|
||||
x += white_key_width;
|
||||
++i;
|
||||
|
||||
if (note + m_track_manager.octave_base() >= note_count)
|
||||
break;
|
||||
if (x >= frame_inner_rect().width())
|
||||
break;
|
||||
}
|
||||
|
||||
note = 1;
|
||||
x = white_key_width - black_key_x_offset;
|
||||
i = 0;
|
||||
for (;;) {
|
||||
Gfx::IntRect rect(x, 0, black_key_width, black_key_height);
|
||||
painter.fill_rect(rect, m_key_on[note] ? note_pressed_color : Color::Black);
|
||||
painter.draw_rect(rect, Color::Black);
|
||||
if (i < black_key_labels_count) {
|
||||
rect.set_height(rect.height() * 1.5);
|
||||
painter.draw_text(rect, StringView(&black_key_labels[i], 1), Gfx::TextAlignment::Center, Color::White);
|
||||
}
|
||||
|
||||
note += black_key_note_accumulator[i % black_keys_per_octave];
|
||||
x += black_key_offsets[i % black_keys_per_octave];
|
||||
++i;
|
||||
|
||||
if (note + m_track_manager.octave_base() >= note_count)
|
||||
break;
|
||||
if (x >= frame_inner_rect().width())
|
||||
break;
|
||||
}
|
||||
|
||||
GUI::Frame::paint_event(event);
|
||||
}
|
||||
|
||||
constexpr int notes_per_white_key[] = {
|
||||
1,
|
||||
3,
|
||||
5,
|
||||
6,
|
||||
8,
|
||||
10,
|
||||
12,
|
||||
};
|
||||
|
||||
// Keep in mind that in any of these functions a note value can be out of
|
||||
// bounds. Bounds checking is done in set_key().
|
||||
|
||||
static inline int note_from_white_keys(int white_keys)
|
||||
{
|
||||
int octaves = white_keys / white_keys_per_octave;
|
||||
int remainder = white_keys % white_keys_per_octave;
|
||||
int notes_from_octaves = octaves * notes_per_octave;
|
||||
int notes_from_remainder = notes_per_white_key[remainder];
|
||||
int note = (notes_from_octaves + notes_from_remainder) - 1;
|
||||
return note;
|
||||
}
|
||||
|
||||
int KeysWidget::note_for_event_position(const Gfx::IntPoint& a_point) const
|
||||
{
|
||||
if (!frame_inner_rect().contains(a_point))
|
||||
return -1;
|
||||
|
||||
auto point = a_point;
|
||||
point.move_by(-frame_thickness(), -frame_thickness());
|
||||
|
||||
int white_keys = point.x() / white_key_width;
|
||||
int note = note_from_white_keys(white_keys);
|
||||
|
||||
bool black_key_on_left = note != 0 && key_pattern[(note - 1) % notes_per_octave] == Black;
|
||||
if (black_key_on_left) {
|
||||
int black_key_x = (white_keys * white_key_width) - black_key_x_offset;
|
||||
Gfx::IntRect black_key(black_key_x, 0, black_key_width, black_key_height);
|
||||
if (black_key.contains(point))
|
||||
return note - 1;
|
||||
}
|
||||
|
||||
bool black_key_on_right = key_pattern[(note + 1) % notes_per_octave] == Black;
|
||||
if (black_key_on_right) {
|
||||
int black_key_x = ((white_keys + 1) * white_key_width) - black_key_x_offset;
|
||||
Gfx::IntRect black_key(black_key_x, 0, black_key_width, black_key_height);
|
||||
if (black_key.contains(point))
|
||||
return note + 1;
|
||||
}
|
||||
|
||||
return note;
|
||||
}
|
||||
|
||||
void KeysWidget::mousedown_event(GUI::MouseEvent& event)
|
||||
{
|
||||
if (event.button() != GUI::MouseButton::Left)
|
||||
return;
|
||||
|
||||
m_mouse_down = true;
|
||||
|
||||
m_mouse_note = note_for_event_position(event.position());
|
||||
|
||||
set_key(m_mouse_note, On);
|
||||
update();
|
||||
}
|
||||
|
||||
void KeysWidget::mouseup_event(GUI::MouseEvent& event)
|
||||
{
|
||||
if (event.button() != GUI::MouseButton::Left)
|
||||
return;
|
||||
|
||||
m_mouse_down = false;
|
||||
|
||||
set_key(m_mouse_note, Off);
|
||||
update();
|
||||
}
|
||||
|
||||
void KeysWidget::mousemove_event(GUI::MouseEvent& event)
|
||||
{
|
||||
if (!m_mouse_down)
|
||||
return;
|
||||
|
||||
int new_mouse_note = note_for_event_position(event.position());
|
||||
|
||||
if (m_mouse_note == new_mouse_note)
|
||||
return;
|
||||
|
||||
set_key(m_mouse_note, Off);
|
||||
set_key(new_mouse_note, On);
|
||||
update();
|
||||
|
||||
m_mouse_note = new_mouse_note;
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue