From 4a36a5161833f28f045f30fe30c64f3100cce2e1 Mon Sep 17 00:00:00 2001 From: William McPherson Date: Fri, 31 Jan 2020 03:02:45 +1100 Subject: Piano: Rewrite application Goals: - Switch to a more typical LibGUI arrangement - Separate GUI (MainWidget) and audio (AudioEngine) - Improve on existing features while retaining the same feature set Improvements: - Each GUI element is a separate widget - The wave (WaveWidget) scales with the window - The piano roll (RollWidget) scales horizontally and scrolls vertically - The piano (KeysWidget) fits as many notes as possible - The knobs (KnobsWidget) are now sliders - All mouse and key events are handled in constant time - The octave can be changed while playing notes - The same note can be played with the mouse, keyboard and roll at the same time, and the volume of the resulting note is scaled accordingly - Note frequency constants use the maximum precision available in a double --- Applications/Piano/KeysWidget.h | 61 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 Applications/Piano/KeysWidget.h (limited to 'Applications/Piano/KeysWidget.h') diff --git a/Applications/Piano/KeysWidget.h b/Applications/Piano/KeysWidget.h new file mode 100644 index 0000000000..c8cdb315ae --- /dev/null +++ b/Applications/Piano/KeysWidget.h @@ -0,0 +1,61 @@ +/* + * Copyright (c) 2018-2020, Andreas Kling + * Copyright (c) 2019-2020, William McPherson + * 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. + */ + +#pragma once + +#include "Music.h" +#include + +class AudioEngine; + +class KeysWidget final : public GFrame { + C_OBJECT(KeysWidget) +public: + virtual ~KeysWidget() override; + + int key_code_to_key(int key_code) const; + int mouse_note() const; + + void set_key(int key, Switch); + +private: + KeysWidget(GWidget* parent, AudioEngine&); + + virtual void paint_event(GPaintEvent&) override; + virtual void mousedown_event(GMouseEvent&) override; + virtual void mouseup_event(GMouseEvent&) override; + virtual void mousemove_event(GMouseEvent&) override; + + int note_for_event_position(Point) const; + + AudioEngine& m_audio_engine; + + u8 m_key_on[note_count] { 0 }; + + bool m_mouse_down { false }; + int m_mouse_note { -1 }; +}; -- cgit v1.2.3