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68c9d227d0
Moving empty destructors out of the .cpp files and into headers allows them to be devirtualized in certain cases. (When the compiler can't "see" a function in a header, it must largely assume it's some black box that the linker will resolve.) While we're at it, use C++11's `= default` to define empty virtual desturctors for us. For some classes (e.g., Piano), nothing is derived from it, so we can mark the class as final and remove any explicit virtual dtor. There are many other places where this can be done, but this is a large enough patch as-is.
140 lines
3.3 KiB
C++
140 lines
3.3 KiB
C++
/*
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* Piano.cpp - implementation of piano-widget used in instrument-track-window
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* for testing + according model class
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*
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* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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/** \file Piano.cpp
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* \brief A piano keyboard to play notes on in the instrument plugin window.
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*/
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/*
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* \mainpage Instrument plugin keyboard display classes
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*
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* \section introduction Introduction
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*
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* \todo fill this out
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* \todo write isWhite inline function and replace throughout
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*/
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#include "Piano.h"
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#include "InstrumentTrack.h"
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/*! The black / white order of keys as they appear on the keyboard.
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*/
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static const Piano::KeyTypes KEY_ORDER[] =
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{
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// C CIS D DIS
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Piano::WhiteKey, Piano::BlackKey, Piano::WhiteKey, Piano::BlackKey,
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// E F FIS G
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Piano::WhiteKey, Piano::WhiteKey, Piano::BlackKey, Piano::WhiteKey,
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// GIS A AIS B
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Piano::BlackKey, Piano::WhiteKey, Piano::BlackKey, Piano::WhiteKey
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} ;
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/*! \brief Create a new keyboard display
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*
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* \param _it the InstrumentTrack window to attach to
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*/
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Piano::Piano( InstrumentTrack* track ) :
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Model( NULL ), /*!< base class ctor */
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m_instrumentTrack( track ),
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m_midiEvProc( track ) /*!< the InstrumentTrack Model */
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{
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for( int i = 0; i < NumKeys; ++i )
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{
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m_pressedKeys[i] = false;
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}
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}
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/*! \brief Turn a key on or off
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*
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* \param key the key number to change
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* \param state the state to set the key to
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*/
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void Piano::setKeyState( int key, bool state )
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{
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if( isValidKey( key ) )
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{
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m_pressedKeys[key] = state;
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emit dataChanged();
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}
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}
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/*! \brief Handle a note being pressed on our keyboard display
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*
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* \param key the key being pressed
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*/
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void Piano::handleKeyPress( int key, int midiVelocity )
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{
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if( midiVelocity == -1 )
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{
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midiVelocity = m_instrumentTrack->midiPort()->baseVelocity();
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}
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if( isValidKey( key ) )
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{
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m_midiEvProc->processInEvent( MidiEvent( MidiNoteOn, -1, key, midiVelocity ) );
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m_pressedKeys[key] = true;
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}
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}
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/*! \brief Handle a note being released on our keyboard display
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*
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* \param key the key being releassed
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*/
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void Piano::handleKeyRelease( int key )
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{
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if( isValidKey( key ) )
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{
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m_midiEvProc->processInEvent( MidiEvent( MidiNoteOff, -1, key, 0 ) );
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m_pressedKeys[key] = false;
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}
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}
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bool Piano::isBlackKey( int key )
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{
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int keyCode = key % KeysPerOctave;
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return KEY_ORDER[keyCode] == Piano::BlackKey;
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}
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bool Piano::isWhiteKey( int key )
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{
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return !isBlackKey( key );
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}
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