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1c715bc335
* New default behavior: Preserves offsets when moving clips, resizes in fixed increments. * Adds shift + drag: Snaps move start position (like current behavior) or end position (new), based on which is closest to the real position. When moving a selection, the grabbed clip snaps into position and the rest move relative to it. * Adds alt + drag: Allows fine adjustment of a clip's position or size, as an alternative to ctrl + drag. * Adds a Q dropdown in the song editor to allow finer or coarser snapping (8 bars to 1/16th bar) * Adds a proportional snap toggle. When enabled, snapping size/Q adjusts based on zoom, and a label appears showing the current snap size. This is disabled by default.
113 lines
3.2 KiB
C++
113 lines
3.2 KiB
C++
/*
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* MidiTime.h - declaration of class MidiTime which provides data type for
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* position- and length-variables
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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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#ifndef MIDI_TIME_H
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#define MIDI_TIME_H
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#include <QtGlobal>
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#include "lmms_export.h"
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#include "lmms_basics.h"
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// note: 1 "Tact" = 1 Measure
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const int DefaultTicksPerTact = 192;
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const int DefaultStepsPerTact = 16;
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const int DefaultBeatsPerTact = DefaultTicksPerTact / DefaultStepsPerTact;
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class MeterModel;
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class LMMS_EXPORT TimeSig
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{
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public:
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// in a time signature,
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// the numerator represents the number of beats in a measure.
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// the denominator indicates which type of note represents a beat.
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// example: 6/8 means 6 beats in a measure, where each beat has duration equal to one 8th-note.
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TimeSig( int num, int denom );
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TimeSig( const MeterModel &model );
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int numerator() const;
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int denominator() const;
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private:
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int m_num;
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int m_denom;
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};
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class LMMS_EXPORT MidiTime
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{
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public:
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MidiTime( const tact_t tact, const tick_t ticks );
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MidiTime( const tick_t ticks = 0 );
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MidiTime quantize(float) const;
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MidiTime toAbsoluteTact() const;
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MidiTime& operator+=( const MidiTime& time );
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MidiTime& operator-=( const MidiTime& time );
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// return the tact, rounded down and 0-based
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tact_t getTact() const;
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// return the tact, rounded up and 0-based
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tact_t nextFullTact() const;
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void setTicks( tick_t ticks );
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tick_t getTicks() const;
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operator int() const;
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tick_t ticksPerBeat( const TimeSig &sig ) const;
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// Remainder ticks after bar is removed
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tick_t getTickWithinBar( const TimeSig &sig ) const;
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// Returns the beat position inside the bar, 0-based
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tick_t getBeatWithinBar( const TimeSig &sig ) const;
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// Remainder ticks after bar and beat are removed
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tick_t getTickWithinBeat( const TimeSig &sig ) const;
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// calculate number of frame that are needed this time
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f_cnt_t frames( const float framesPerTick ) const;
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double getTimeInMilliseconds(bpm_t beatsPerMinute) const;
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static MidiTime fromFrames( const f_cnt_t frames, const float framesPerTick );
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static tick_t ticksPerTact();
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static tick_t ticksPerTact( const TimeSig &sig );
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static int stepsPerTact();
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static void setTicksPerTact( tick_t tpt );
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static MidiTime stepPosition( int step );
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static double ticksToMilliseconds(tick_t ticks, bpm_t beatsPerMinute);
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static double ticksToMilliseconds(double ticks, bpm_t beatsPerMinute);
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private:
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tick_t m_ticks;
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static tick_t s_ticksPerTact;
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} ;
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#endif
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