Make shifting notes by octaves respect microtuning (#6545)

include/Microtuner.h

@@ -54,6 +54,7 @@ public:
 	float baseFreq() const;
 
 	float keyToFreq(int key, int userBaseNote) const;
+	int octaveSize() const;
 
 	QString nodeName() const override {return "microtuner";}
 	void saveSettings(QDomDocument & document, QDomElement &element) override;

src/core/Microtuner.cpp

@@ -108,6 +108,17 @@ float Microtuner::keyToFreq(int key, int userBaseNote) const
 	return middleFreq * intervals[scaleDegree].getRatio() * pow(octaveRatio, keymapOctave + scaleOctave);
 }
 
+int Microtuner::octaveSize() const
+{
+	const int keymapSize = Engine::getSong()->getKeymap(currentKeymap())->getSize();
+	if (keymapSize > 0)
+	{
+		return keymapSize;
+	}
+
+	// Determine octave size from the scale if the keymap isn't in use.
+	return Engine::getSong()->getScale(currentScale())->getIntervals().size() - 1;
+}
 
 /**
  * \brief Update scale name displayed in the microtuner scale list.
@@ -170,4 +181,4 @@ void Microtuner::loadSettings(const QDomElement &element)
 }
 
 
-} // namespace lmms
+} // namespace lmms

src/gui/editors/PianoRoll.cpp

@@ -1310,16 +1310,25 @@ void PianoRoll::keyPressEvent(QKeyEvent* ke)
 				int direction = (ke->key() == Qt::Key_Up ? +1 : -1);
 				if( ( ke->modifiers() & Qt::ControlModifier ) && m_action == ActionNone )
 				{
-					// shift selection up an octave
+					// shift selection by one octave
 					// if nothing selected, shift _everything_
 					if (hasValidMidiClip())
 					{
-						shiftSemiTone( 12 * direction );
+						// An octave could potentially be greater or less than twelve semitones if the microtuner is in use.
+						const auto microtuner = m_midiClip->instrumentTrack()->microtuner();
+						if (microtuner->enabled())
+						{
+							shiftSemiTone(microtuner->octaveSize() * direction);
+						}
+						else
+						{
+							shiftSemiTone(12 * direction);
+						}
 					}
 				}
 				else if((ke->modifiers() & Qt::ShiftModifier) && m_action == ActionNone)
 				{
-					// Move selected notes up by one semitone
+					// Move selected notes by one semitone
 					if (hasValidMidiClip())
 					{
 						shiftSemiTone( 1 * direction );