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https://github.com/dwhinham/mt32-pi.git
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71fa6533af
Improve the button handling code so that a pressed and held button will now generate additional press events after a short delay. An acceleration curve is also applied so that events are generated with increasing frequency the longer the button is held down. Closes #323.
100 lines
1.8 KiB
C++
100 lines
1.8 KiB
C++
//
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// event.h
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//
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// mt32-pi - A baremetal MIDI synthesizer for Raspberry Pi
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// Copyright (C) 2020-2023 Dale Whinham <daleyo@gmail.com>
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//
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// This file is part of mt32-pi.
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//
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// mt32-pi is free software: you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// mt32-pi is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along with
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// mt32-pi. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef _event_h
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#define _event_h
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#include "control/button.h"
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#include "lcd/images.h"
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#include "ringbuffer.h"
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#include "synth/mt32romset.h"
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#include "synth/synth.h"
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struct TButtonEvent
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{
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TButton Button;
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bool bPressed;
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bool bRepeat;
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};
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struct TEncoderEvent
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{
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s8 nDelta;
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};
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struct TSwitchSynthEvent
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{
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TSynth Synth;
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};
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struct TSwitchMT32ROMSetEvent
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{
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TMT32ROMSet ROMSet;
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};
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struct TSwitchSoundFontEvent
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{
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size_t Index;
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};
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struct TAllSoundOffEvent
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{
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// No payload
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};
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struct TDisplayImageEvent
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{
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TImage Image;
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};
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enum class TEventType
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{
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Button,
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Encoder,
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SwitchSynth,
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SwitchMT32ROMSet,
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SwitchSoundFont,
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AllSoundOff,
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DisplayImage,
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};
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struct TEvent
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{
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TEventType Type;
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union
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{
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TButtonEvent Button;
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TEncoderEvent Encoder;
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TSwitchSynthEvent SwitchSynth;
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TSwitchMT32ROMSetEvent SwitchMT32ROMSet;
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TSwitchSoundFontEvent SwitchSoundFont;
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TAllSoundOffEvent AllSoundOff;
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TDisplayImageEvent DisplayImage;
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};
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};
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constexpr size_t EventQueueSize = 32;
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using TEventQueue = CRingBuffer<TEvent, EventQueueSize>;
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#endif
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