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