//
// uimenu.cpp
//
// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
// Copyright (C) 2022  The MiniDexed Team
//
// Original author of this class:
//	R. Stange <rsta2@o2online.de>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
#include "uimenu.h"
#include "minidexed.h"
#include "mididevice.h"
#include "userinterface.h"
#include "sysexfileloader.h"
#include "config.h"
#include <circle/sysconfig.h>
#include <assert.h>

using namespace std;

const CUIMenu::TMenuItem CUIMenu::s_MenuRoot[] =
{
	{"MiniDexed", MenuHandler, s_MainMenu},
	{0}
};

// inserting menu items before "TG1" affect TGShortcutHandler()
const CUIMenu::TMenuItem CUIMenu::s_MainMenu[] =
{
	{"TG1",		MenuHandler,	s_TGMenu, 0},
#ifdef ARM_ALLOW_MULTI_CORE
	{"TG2",		MenuHandler,	s_TGMenu, 1},
	{"TG3",		MenuHandler,	s_TGMenu, 2},
	{"TG4",		MenuHandler,	s_TGMenu, 3},
	{"TG5",		MenuHandler,	s_TGMenu, 4},
	{"TG6",		MenuHandler,	s_TGMenu, 5},
	{"TG7",		MenuHandler,	s_TGMenu, 6},
	{"TG8",		MenuHandler,	s_TGMenu, 7},
#endif
	{"Effects",	MenuHandler,	s_EffectsMenu},
	{"Save",	MenuHandler,	s_SaveMenu},
	{0}
};

const CUIMenu::TMenuItem CUIMenu::s_TGMenu[] =
{
	{"Voice",	EditProgramNumber},
	{"Bank",	EditVoiceBankNumber},
	{"Volume",	EditTGParameter,	0,	CMiniDexed::TGParameterVolume},
#ifdef ARM_ALLOW_MULTI_CORE
	{"Pan",		EditTGParameter,	0,	CMiniDexed::TGParameterPan},
#endif
	{"Detune",	EditTGParameter,	0,	CMiniDexed::TGParameterMasterTune},
	{"Channel",	EditTGParameter,	0,	CMiniDexed::TGParameterMIDIChannel},
	{"Edit Voice",	MenuHandler,		s_EditVoiceMenu},
	{0}
};

const CUIMenu::TMenuItem CUIMenu::s_EffectsMenu[] =
{
	{"Compress",	EditGlobalParameter,	0,	CMiniDexed::ParameterCompressorEnable},
#ifdef ARM_ALLOW_MULTI_CORE
	{"Reverb",	MenuHandler,		s_ReverbMenu},
#endif
	{0}
};

#ifdef ARM_ALLOW_MULTI_CORE

const CUIMenu::TMenuItem CUIMenu::s_ReverbMenu[] =
{
	{"Enable",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbEnable},
	{"Size",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbSize},
	{"High damp",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbHighDamp},
	{"Low damp",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbLowDamp},
	{"Low pass",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbLowPass},
	{"Diffusion",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbDiffusion},
	{"Level",	EditGlobalParameter,	0,	CMiniDexed::ParameterReverbLevel},
	{0}
};

#endif

// inserting menu items before "OP1" affect OPShortcutHandler()
const CUIMenu::TMenuItem CUIMenu::s_EditVoiceMenu[] =
{
	{"OP1",		MenuHandler,		s_OperatorMenu, 0},
	{"OP2",		MenuHandler,		s_OperatorMenu, 1},
	{"OP3",		MenuHandler,		s_OperatorMenu, 2},
	{"OP4",		MenuHandler,		s_OperatorMenu, 3},
	{"OP5",		MenuHandler,		s_OperatorMenu, 4},
	{"OP6",		MenuHandler,		s_OperatorMenu, 5},
	{"P EG Rate 1",	EditVoiceParameter,	0,		DEXED_PITCH_EG_R1},
	{"P EG Rate 2",	EditVoiceParameter,	0,		DEXED_PITCH_EG_R2},
	{"P EG Rate 3",	EditVoiceParameter,	0,		DEXED_PITCH_EG_R3},
	{"P EG Rate 4",	EditVoiceParameter,	0,		DEXED_PITCH_EG_R4},
	{"P EG Level 1",EditVoiceParameter,	0,		DEXED_PITCH_EG_L1},
	{"P EG Level 2",EditVoiceParameter,	0,		DEXED_PITCH_EG_L2},
	{"P EG Level 3",EditVoiceParameter,	0,		DEXED_PITCH_EG_L3},
	{"P EG Level 4",EditVoiceParameter,	0,		DEXED_PITCH_EG_L4},
	{"Algorithm",	EditVoiceParameter,	0,		DEXED_ALGORITHM},
	{"Feedback",	EditVoiceParameter,	0,		DEXED_FEEDBACK},
	{"Osc Key Sync",EditVoiceParameter,	0,		DEXED_OSC_KEY_SYNC},
	{"LFO Speed",	EditVoiceParameter,	0,		DEXED_LFO_SPEED},
	{"LFO Delay",	EditVoiceParameter,	0,		DEXED_LFO_DELAY},
	{"LFO PMD",	EditVoiceParameter,	0,		DEXED_LFO_PITCH_MOD_DEP},
	{"LFO AMD",	EditVoiceParameter,	0,		DEXED_LFO_AMP_MOD_DEP},
	{"LFO Sync",	EditVoiceParameter,	0,		DEXED_LFO_SYNC},
	{"LFO Wave",	EditVoiceParameter,	0,		DEXED_LFO_WAVE},
	{"P Mod Sens.",	EditVoiceParameter,	0,		DEXED_LFO_PITCH_MOD_SENS},
	{"Transpose",	EditVoiceParameter,	0,		DEXED_TRANSPOSE},
	{0}
};

const CUIMenu::TMenuItem CUIMenu::s_OperatorMenu[] =
{
	{"EG Rate 1",	EditOPParameter,	0,	DEXED_OP_EG_R1},
	{"EG Rate 2",	EditOPParameter,	0,	DEXED_OP_EG_R2},
	{"EG Rate 3",	EditOPParameter,	0,	DEXED_OP_EG_R3},
	{"EG Rate 4",	EditOPParameter,	0,	DEXED_OP_EG_R4},
	{"EG Level 1",	EditOPParameter,	0,	DEXED_OP_EG_L1},
	{"EG Level 2",	EditOPParameter,	0,	DEXED_OP_EG_L2},
	{"EG Level 3",	EditOPParameter,	0,	DEXED_OP_EG_L3},
	{"EG Level 4",	EditOPParameter,	0,	DEXED_OP_EG_L4},
	{"Break Point",	EditOPParameter,	0,	DEXED_OP_LEV_SCL_BRK_PT},
	{"L Key Depth",	EditOPParameter,	0,	DEXED_OP_SCL_LEFT_DEPTH},
	{"R Key Depth",	EditOPParameter,	0,	DEXED_OP_SCL_RGHT_DEPTH},
	{"L Key Scale",	EditOPParameter,	0,	DEXED_OP_SCL_LEFT_CURVE},
	{"R Key Scale",	EditOPParameter,	0,	DEXED_OP_SCL_RGHT_CURVE},
	{"Rate Scaling",EditOPParameter,	0,	DEXED_OP_OSC_RATE_SCALE},
	{"A Mod Sens.",	EditOPParameter,	0,	DEXED_OP_AMP_MOD_SENS},
	{"K Vel. Sens.",EditOPParameter,	0,	DEXED_OP_KEY_VEL_SENS},
	{"Output Level",EditOPParameter,	0,	DEXED_OP_OUTPUT_LEV},
	{"Osc Mode",	EditOPParameter,	0,	DEXED_OP_OSC_MODE},
	{"Freq Coarse",	EditOPParameter,	0,	DEXED_OP_FREQ_COARSE},
	{"Freq Fine",	EditOPParameter,	0,	DEXED_OP_FREQ_FINE},
	{"Osc Detune",	EditOPParameter,	0,	DEXED_OP_OSC_DETUNE},
	{0}
};

const CUIMenu::TMenuItem CUIMenu::s_SaveMenu[] =
{
	{"Performance",	SavePerformance},
	{0}
};

// must match CMiniDexed::TParameter
const CUIMenu::TParameter CUIMenu::s_GlobalParameter[CMiniDexed::ParameterUnknown] =
{
	{0,	1,	1,	ToOnOff},		// ParameterCompessorEnable
	{0,	1,	1,	ToOnOff},		// ParameterReverbEnable
	{0,	99,	1},				// ParameterReverbSize
	{0,	99,	1},				// ParameterReverbHighDamp
	{0,	99,	1},				// ParameterReverbLowDamp
	{0,	99,	1},				// ParameterReverbLowPass
	{0,	99,	1},				// ParameterReverbDiffusion
	{0,	99,	1}				// ParameterReverbLevel
};

// must match CMiniDexed::TTGParameter
const CUIMenu::TParameter CUIMenu::s_TGParameter[CMiniDexed::TGParameterUnknown] =
{
	{0,	CSysExFileLoader::MaxVoiceBankID,	1},		// TGParameterVoiceBank
	{0,	CSysExFileLoader::VoicesPerBank-1,	1},		// TGParameterProgram
	{0,	127,					8, ToVolume},	// TGParameterVolume
	{0,	127,					8, ToPan},	// TGParameterPan
	{-99,	99,					1},		// TGParameterMasterTune
	{0,	CMIDIDevice::ChannelUnknown-1,		1, ToMIDIChannel} // TGParameterMIDIChannel
};

// must match DexedVoiceParameters in Synth_Dexed
const CUIMenu::TParameter CUIMenu::s_VoiceParameter[] =
{
	{0,	99,	1},				// DEXED_PITCH_EG_R1
	{0,	99,	1},				// DEXED_PITCH_EG_R2
	{0,	99,	1},				// DEXED_PITCH_EG_R3
	{0,	99,	1},				// DEXED_PITCH_EG_R4
	{0,	99,	1},				// DEXED_PITCH_EG_L1
	{0,	99,	1},				// DEXED_PITCH_EG_L2
	{0,	99,	1},				// DEXED_PITCH_EG_L3
	{0,	99,	1},				// DEXED_PITCH_EG_L4
	{0,	31,	1,	ToAlgorithm},		// DEXED_ALGORITHM
	{0,	7,	1},				// DEXED_FEEDBACK
	{0,	1,	1,	ToOnOff},		// DEXED_OSC_KEY_SYNC
	{0,	99,	1},				// DEXED_LFO_SPEED
	{0,	99,	1},				// DEXED_LFO_DELAY
	{0,	99,	1},				// DEXED_LFO_PITCH_MOD_DEP
	{0,	99,	1},				// DEXED_LFO_AMP_MOD_DEP
	{0,	1,	1,	ToOnOff},		// DEXED_LFO_SYNC
	{0,	5,	1,	ToLFOWaveform},		// DEXED_LFO_WAVE
	{0,	7,	1},				// DEXED_LFO_PITCH_MOD_SENS
	{0,	48,	1,	ToTransposeNote}	// DEXED_TRANSPOSE
};

// must match DexedVoiceOPParameters in Synth_Dexed
const CUIMenu::TParameter CUIMenu::s_OPParameter[] =
{
	{0,	99,	1},				// DEXED_OP_EG_R1
	{0,	99,	1},				// DEXED_OP_EG_R2
	{0,	99,	1},				// DEXED_OP_EG_R3
	{0,	99,	1},				// DEXED_OP_EG_R4
	{0,	99,	1},				// DEXED_OP_EG_L1
	{0,	99,	1},				// DEXED_OP_EG_L2
	{0,	99,	1},				// DEXED_OP_EG_L3
	{0,	99,	1},				// DEXED_OP_EG_L4
	{0,	99,	1,	ToBreakpointNote},	// DEXED_OP_LEV_SCL_BRK_PT
	{0,	99,	1},				// DEXED_OP_SCL_LEFT_DEPTH
	{0,	99,	1},				// DEXED_OP_SCL_RGHT_DEPTH
	{0,	3,	1,	ToKeyboardCurve},	// DEXED_OP_SCL_LEFT_CURVE
	{0,	3,	1,	ToKeyboardCurve},	// DEXED_OP_SCL_RGHT_CURVE
	{0,	7,	1},				// DEXED_OP_OSC_RATE_SCALE
	{0,	3,	1},				// DEXED_OP_AMP_MOD_SENS
	{0,	7,	1},				// DEXED_OP_KEY_VEL_SENS
	{0,	99,	1},				// DEXED_OP_OUTPUT_LEV
	{0,	1,	1,	ToOscillatorMode},	// DEXED_OP_OSC_MODE
	{0,	31,	1},				// DEXED_OP_FREQ_COARSE
	{0,	99,	1},				// DEXED_OP_FREQ_FINE
	{0,	14,	1,	ToOscillatorDetune}	// DEXED_OP_OSC_DETUNE
};

const char CUIMenu::s_NoteName[100][4] =
{
	"A1", "A#1", "B1", "C1", "C#1", "D1", "D#1", "E1", "F1", "F#1",	"G1", "G#1",
	"A2", "A#2", "B2", "C2", "C#2", "D2", "D#2", "E2", "F2", "F#2", "G2", "G#2",
	"A3", "A#3", "B3", "C3", "C#3", "D3", "D#3", "E3", "F3", "F#3", "G3", "G#3",
	"A4", "A#4", "B4", "C4", "C#4", "D4", "D#4", "E4", "F4", "F#4", "G4", "G#4",
	"A5", "A#5", "B5", "C5", "C#5", "D5", "D#5", "E5", "F5", "F#5", "G5", "G#5",
	"A6", "A#6", "B6", "C6", "C#6", "D6", "D#6", "E6", "F6", "F#6", "G6", "G#6",
	"A7", "A#7", "B7", "C7", "C#7", "D7", "D#7", "E7", "F7", "F#7", "G7", "G#7",
	"A8", "A#8", "B8", "C8", "C#8", "D8", "D#8", "E8", "F8", "F#8", "G8", "G#8",
	"A9", "A#9", "B9", "C9"
};
static const unsigned NoteC3 = 27;

CUIMenu::CUIMenu (CUserInterface *pUI, CMiniDexed *pMiniDexed)
:	m_pUI (pUI),
	m_pMiniDexed (pMiniDexed),
	m_pParentMenu (s_MenuRoot),
	m_pCurrentMenu (s_MainMenu),
	m_nCurrentMenuItem (0),
	m_nCurrentSelection (0),
	m_nCurrentParameter (0),
	m_nCurrentMenuDepth (0)
{
}

void CUIMenu::EventHandler (TMenuEvent Event)
{
	switch (Event)
	{
	case MenuEventBack:				// pop menu
		if (m_nCurrentMenuDepth)
		{
			m_nCurrentMenuDepth--;

			m_pParentMenu = m_MenuStackParent[m_nCurrentMenuDepth];
			m_pCurrentMenu = m_MenuStackMenu[m_nCurrentMenuDepth];
			m_nCurrentMenuItem = m_nMenuStackItem[m_nCurrentMenuDepth];
			m_nCurrentSelection = m_nMenuStackSelection[m_nCurrentMenuDepth];
			m_nCurrentParameter = m_nMenuStackParameter[m_nCurrentMenuDepth];

			EventHandler (MenuEventUpdate);
		}
		break;

	case MenuEventHome:
		m_pParentMenu = s_MenuRoot;
		m_pCurrentMenu = s_MainMenu;
		m_nCurrentMenuItem = 0;
		m_nCurrentSelection = 0;
		m_nCurrentParameter = 0;
		m_nCurrentMenuDepth = 0;

		EventHandler (MenuEventUpdate);
		break;

	default:
		(*m_pParentMenu[m_nCurrentMenuItem].Handler) (this, Event);
		break;
	}
}

void CUIMenu::MenuHandler (CUIMenu *pUIMenu, TMenuEvent Event)
{
	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventSelect:				// push menu
		assert (pUIMenu->m_nCurrentMenuDepth < MaxMenuDepth);
		pUIMenu->m_MenuStackParent[pUIMenu->m_nCurrentMenuDepth] = pUIMenu->m_pParentMenu;
		pUIMenu->m_MenuStackMenu[pUIMenu->m_nCurrentMenuDepth] = pUIMenu->m_pCurrentMenu;
		pUIMenu->m_nMenuStackItem[pUIMenu->m_nCurrentMenuDepth]
			= pUIMenu->m_nCurrentMenuItem;
		pUIMenu->m_nMenuStackSelection[pUIMenu->m_nCurrentMenuDepth]
			= pUIMenu->m_nCurrentSelection;
		pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth]
			= pUIMenu->m_nCurrentParameter;
		pUIMenu->m_nCurrentMenuDepth++;

		pUIMenu->m_pParentMenu = pUIMenu->m_pCurrentMenu;
		pUIMenu->m_nCurrentParameter =
			pUIMenu->m_pCurrentMenu[pUIMenu->m_nCurrentSelection].Parameter;
		pUIMenu->m_pCurrentMenu =
			pUIMenu->m_pCurrentMenu[pUIMenu->m_nCurrentSelection].MenuItem;
		pUIMenu->m_nCurrentMenuItem = pUIMenu->m_nCurrentSelection;
		pUIMenu->m_nCurrentSelection = 0;
		break;

	case MenuEventStepDown:
		if (pUIMenu->m_nCurrentSelection > 0)
		{
			pUIMenu->m_nCurrentSelection--;
		}
		break;

	case MenuEventStepUp:
		++pUIMenu->m_nCurrentSelection;
		if (!pUIMenu->m_pCurrentMenu[pUIMenu->m_nCurrentSelection].Name)  // more entries?
		{
			pUIMenu->m_nCurrentSelection--;
		}
		break;

	default:
		return;
	}

	if (pUIMenu->m_pCurrentMenu)				// if this is another menu?
	{
		pUIMenu->m_pUI->DisplayWrite (
			pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
			"",
			pUIMenu->m_pCurrentMenu[pUIMenu->m_nCurrentSelection].Name,
			pUIMenu->m_nCurrentSelection > 0,
			!!pUIMenu->m_pCurrentMenu[pUIMenu->m_nCurrentSelection+1].Name);
	}
	else
	{
		pUIMenu->EventHandler (MenuEventUpdate);	// no, update parameter display
	}
}

void CUIMenu::EditGlobalParameter (CUIMenu *pUIMenu, TMenuEvent Event)
{
	CMiniDexed::TParameter Param = (CMiniDexed::TParameter) pUIMenu->m_nCurrentParameter;
	const TParameter &rParam = s_GlobalParameter[Param];

	int nValue = pUIMenu->m_pMiniDexed->GetParameter (Param);

	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventStepDown:
		nValue -= rParam.Increment;
		if (nValue < rParam.Minimum)
		{
			nValue = rParam.Minimum;
		}
		pUIMenu->m_pMiniDexed->SetParameter (Param, nValue);
		break;

	case MenuEventStepUp:
		nValue += rParam.Increment;
		if (nValue > rParam.Maximum)
		{
			nValue = rParam.Maximum;
		}
		pUIMenu->m_pMiniDexed->SetParameter (Param, nValue);
		break;

	default:
		return;
	}

	const char *pMenuName =
		pUIMenu->m_MenuStackParent[pUIMenu->m_nCurrentMenuDepth-1]
			[pUIMenu->m_nMenuStackItem[pUIMenu->m_nCurrentMenuDepth-1]].Name;

	string Value = GetGlobalValueString (Param, pUIMenu->m_pMiniDexed->GetParameter (Param));

	pUIMenu->m_pUI->DisplayWrite (pMenuName,
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      Value.c_str (),
				      nValue > rParam.Minimum, nValue < rParam.Maximum);
}

void CUIMenu::EditVoiceBankNumber (CUIMenu *pUIMenu, TMenuEvent Event)
{
	unsigned nTG = pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth-1];

	int nValue = pUIMenu->m_pMiniDexed->GetTGParameter (CMiniDexed::TGParameterVoiceBank, nTG);

	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventStepDown:
		if (--nValue < 0)
		{
			nValue = 0;
		}
		pUIMenu->m_pMiniDexed->SetTGParameter (
			CMiniDexed::TGParameterVoiceBank, nValue, nTG);
		break;

	case MenuEventStepUp:
		if (++nValue > (int) CSysExFileLoader::MaxVoiceBankID)
		{
			nValue = CSysExFileLoader::MaxVoiceBankID;
		}
		pUIMenu->m_pMiniDexed->SetTGParameter (
			CMiniDexed::TGParameterVoiceBank, nValue, nTG);
		break;

	case MenuEventPressAndStepDown:
	case MenuEventPressAndStepUp:
		pUIMenu->TGShortcutHandler (Event);
		return;

	default:
		return;
	}

	string TG ("TG");
	TG += to_string (nTG+1);

	string Value =   to_string (nValue+1) + "="
		       + pUIMenu->m_pMiniDexed->GetSysExFileLoader ()->GetBankName (nValue);

	pUIMenu->m_pUI->DisplayWrite (TG.c_str (),
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      Value.c_str (),
				      nValue > 0, nValue < (int) CSysExFileLoader::MaxVoiceBankID);
}

void CUIMenu::EditProgramNumber (CUIMenu *pUIMenu, TMenuEvent Event)
{
	unsigned nTG = pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth-1];

	int nValue = pUIMenu->m_pMiniDexed->GetTGParameter (CMiniDexed::TGParameterProgram, nTG);

	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventStepDown:
		if (--nValue < 0)
		{
			nValue = 0;
		}
		pUIMenu->m_pMiniDexed->SetTGParameter (CMiniDexed::TGParameterProgram, nValue, nTG);
		break;

	case MenuEventStepUp:
		if (++nValue > (int) CSysExFileLoader::VoicesPerBank-1)
		{
			nValue = CSysExFileLoader::VoicesPerBank-1;
		}
		pUIMenu->m_pMiniDexed->SetTGParameter (CMiniDexed::TGParameterProgram, nValue, nTG);
		break;

	case MenuEventPressAndStepDown:
	case MenuEventPressAndStepUp:
		pUIMenu->TGShortcutHandler (Event);
		return;

	default:
		return;
	}

	string TG ("TG");
	TG += to_string (nTG+1);

	string Value = to_string (nValue+1) + "=" + pUIMenu->m_pMiniDexed->GetVoiceName (nTG);

	pUIMenu->m_pUI->DisplayWrite (TG.c_str (),
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      Value.c_str (),
				      nValue > 0, nValue < (int) CSysExFileLoader::VoicesPerBank-1);
}

void CUIMenu::EditTGParameter (CUIMenu *pUIMenu, TMenuEvent Event)
{
	unsigned nTG = pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth-1];

	CMiniDexed::TTGParameter Param = (CMiniDexed::TTGParameter) pUIMenu->m_nCurrentParameter;
	const TParameter &rParam = s_TGParameter[Param];

	int nValue = pUIMenu->m_pMiniDexed->GetTGParameter (Param, nTG);

	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventStepDown:
		nValue -= rParam.Increment;
		if (nValue < rParam.Minimum)
		{
			nValue = rParam.Minimum;
		}
		pUIMenu->m_pMiniDexed->SetTGParameter (Param, nValue, nTG);
		break;

	case MenuEventStepUp:
		nValue += rParam.Increment;
		if (nValue > rParam.Maximum)
		{
			nValue = rParam.Maximum;
		}
		pUIMenu->m_pMiniDexed->SetTGParameter (Param, nValue, nTG);
		break;

	case MenuEventPressAndStepDown:
	case MenuEventPressAndStepUp:
		pUIMenu->TGShortcutHandler (Event);
		return;

	default:
		return;
	}

	string TG ("TG");
	TG += to_string (nTG+1);

	string Value = GetTGValueString (Param, pUIMenu->m_pMiniDexed->GetTGParameter (Param, nTG));

	pUIMenu->m_pUI->DisplayWrite (TG.c_str (),
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      Value.c_str (),
				      nValue > rParam.Minimum, nValue < rParam.Maximum);
}

void CUIMenu::EditVoiceParameter (CUIMenu *pUIMenu, TMenuEvent Event)
{
	unsigned nTG = pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth-2];

	unsigned nParam = pUIMenu->m_nCurrentParameter;
	const TParameter &rParam = s_VoiceParameter[nParam];

	int nValue = pUIMenu->m_pMiniDexed->GetVoiceParameter (nParam, CMiniDexed::NoOP, nTG);

	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventStepDown:
		nValue -= rParam.Increment;
		if (nValue < rParam.Minimum)
		{
			nValue = rParam.Minimum;
		}
		pUIMenu->m_pMiniDexed->SetVoiceParameter (nParam, nValue, CMiniDexed::NoOP, nTG);
		break;

	case MenuEventStepUp:
		nValue += rParam.Increment;
		if (nValue > rParam.Maximum)
		{
			nValue = rParam.Maximum;
		}
		pUIMenu->m_pMiniDexed->SetVoiceParameter (nParam, nValue, CMiniDexed::NoOP, nTG);
		break;

	case MenuEventPressAndStepDown:
	case MenuEventPressAndStepUp:
		pUIMenu->TGShortcutHandler (Event);
		return;

	default:
		return;
	}

	string TG ("TG");
	TG += to_string (nTG+1);

	string Value = GetVoiceValueString (nParam, nValue);

	pUIMenu->m_pUI->DisplayWrite (TG.c_str (),
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      Value.c_str (),
				      nValue > rParam.Minimum, nValue < rParam.Maximum);
}

void CUIMenu::EditOPParameter (CUIMenu *pUIMenu, TMenuEvent Event)
{
	unsigned nTG = pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth-3];
	unsigned nOP = pUIMenu->m_nMenuStackParameter[pUIMenu->m_nCurrentMenuDepth-1];

	unsigned nParam = pUIMenu->m_nCurrentParameter;
	const TParameter &rParam = s_OPParameter[nParam];

	int nValue = pUIMenu->m_pMiniDexed->GetVoiceParameter (nParam, nOP, nTG);

	switch (Event)
	{
	case MenuEventUpdate:
		break;

	case MenuEventStepDown:
		nValue -= rParam.Increment;
		if (nValue < rParam.Minimum)
		{
			nValue = rParam.Minimum;
		}
		pUIMenu->m_pMiniDexed->SetVoiceParameter (nParam, nValue, nOP, nTG);
		break;

	case MenuEventStepUp:
		nValue += rParam.Increment;
		if (nValue > rParam.Maximum)
		{
			nValue = rParam.Maximum;
		}
		pUIMenu->m_pMiniDexed->SetVoiceParameter (nParam, nValue, nOP, nTG);
		break;

	case MenuEventPressAndStepDown:
	case MenuEventPressAndStepUp:
		pUIMenu->OPShortcutHandler (Event);
		return;

	default:
		return;
	}

	string OP ("OP");
	OP += to_string (nOP+1);

	string Value = GetOPValueString (nParam, nValue);

	pUIMenu->m_pUI->DisplayWrite (OP.c_str (),
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      Value.c_str (),
				      nValue > rParam.Minimum, nValue < rParam.Maximum);
}

void CUIMenu::SavePerformance (CUIMenu *pUIMenu, TMenuEvent Event)
{
	if (Event != MenuEventUpdate)
	{
		return;
	}

	bool bOK = pUIMenu->m_pMiniDexed->SavePerformance ();

	const char *pMenuName =
		pUIMenu->m_MenuStackParent[pUIMenu->m_nCurrentMenuDepth-1]
			[pUIMenu->m_nMenuStackItem[pUIMenu->m_nCurrentMenuDepth-1]].Name;

	pUIMenu->m_pUI->DisplayWrite (pMenuName,
				      pUIMenu->m_pParentMenu[pUIMenu->m_nCurrentMenuItem].Name,
				      bOK ? "Completed" : "Error",
				      false, false);

	CTimer::Get ()->StartKernelTimer (MSEC2HZ (1500), TimerHandler, 0, pUIMenu);
}

string CUIMenu::GetGlobalValueString (unsigned nParameter, int nValue)
{
	string Result;

	assert (nParameter < sizeof CUIMenu::s_GlobalParameter / sizeof CUIMenu::s_GlobalParameter[0]);

	CUIMenu::TToString *pToString = CUIMenu::s_GlobalParameter[nParameter].ToString;
	if (pToString)
	{
		Result = (*pToString) (nValue);
	}
	else
	{
		Result = to_string (nValue);
	}

	return Result;
}

string CUIMenu::GetTGValueString (unsigned nTGParameter, int nValue)
{
	string Result;

	assert (nTGParameter < sizeof CUIMenu::s_TGParameter / sizeof CUIMenu::s_TGParameter[0]);

	CUIMenu::TToString *pToString = CUIMenu::s_TGParameter[nTGParameter].ToString;
	if (pToString)
	{
		Result = (*pToString) (nValue);
	}
	else
	{
		Result = to_string (nValue);
	}

	return Result;
}

string CUIMenu::GetVoiceValueString (unsigned nVoiceParameter, int nValue)
{
	string Result;

	assert (nVoiceParameter < sizeof CUIMenu::s_VoiceParameter / sizeof CUIMenu::s_VoiceParameter[0]);

	CUIMenu::TToString *pToString = CUIMenu::s_VoiceParameter[nVoiceParameter].ToString;
	if (pToString)
	{
		Result = (*pToString) (nValue);
	}
	else
	{
		Result = to_string (nValue);
	}

	return Result;
}

string CUIMenu::GetOPValueString (unsigned nOPParameter, int nValue)
{
	string Result;

	assert (nOPParameter < sizeof CUIMenu::s_OPParameter / sizeof CUIMenu::s_OPParameter[0]);

	CUIMenu::TToString *pToString = CUIMenu::s_OPParameter[nOPParameter].ToString;
	if (pToString)
	{
		Result = (*pToString) (nValue);
	}
	else
	{
		Result = to_string (nValue);
	}

	return Result;
}

string CUIMenu::ToVolume (int nValue)
{
	static const size_t MaxChars = CConfig::LCDColumns-2;
	char VolumeBar[MaxChars+1];
	memset (VolumeBar, 0xFF, sizeof VolumeBar);	// 0xFF is the block character
	VolumeBar[nValue * MaxChars / 127] = '\0';

	return VolumeBar;
}

string CUIMenu::ToPan (int nValue)
{
	assert (CConfig::LCDColumns == 16);
	static const size_t MaxChars = CConfig::LCDColumns-3;
	char PanMarker[MaxChars+1] = "......:......";
	unsigned nIndex = nValue * MaxChars / 127;
	if (nIndex == MaxChars)
	{
		nIndex--;
	}
	PanMarker[nIndex] = '\xFF';			// 0xFF is the block character

	return PanMarker;
}

string CUIMenu::ToMIDIChannel (int nValue)
{
	switch (nValue)
	{
	case CMIDIDevice::OmniMode:	return "Omni";
	case CMIDIDevice::Disabled:	return "Off";
	default:			return to_string (nValue+1);
	}
}

string CUIMenu::ToAlgorithm (int nValue)
{
	return to_string (nValue + 1);
}

string CUIMenu::ToOnOff (int nValue)
{
	static const char *OnOff[] = {"Off", "On"};

	assert ((unsigned) nValue < sizeof OnOff / sizeof OnOff[0]);

	return OnOff[nValue];
}

string CUIMenu::ToLFOWaveform (int nValue)
{
	static const char *Waveform[] = {"Triangle", "Saw down", "Saw up",
					 "Square", "Sine", "Sample/Hold"};

	assert ((unsigned) nValue < sizeof Waveform / sizeof Waveform[0]);

	return Waveform[nValue];
}

string CUIMenu::ToTransposeNote (int nValue)
{
	nValue += NoteC3 - 24;

	assert ((unsigned) nValue < sizeof s_NoteName / sizeof s_NoteName[0]);

	return s_NoteName[nValue];
}

string CUIMenu::ToBreakpointNote (int nValue)
{
	assert ((unsigned) nValue < sizeof s_NoteName / sizeof s_NoteName[0]);

	return s_NoteName[nValue];
}

string CUIMenu::ToKeyboardCurve (int nValue)
{
	static const char *Curve[] = {"-Lin", "-Exp", "+Exp", "+Lin"};

	assert ((unsigned) nValue < sizeof Curve / sizeof Curve[0]);

	return Curve[nValue];
}

string CUIMenu::ToOscillatorMode (int nValue)
{
	static const char *Mode[] = {"Ratio", "Fixed"};

	assert ((unsigned) nValue < sizeof Mode / sizeof Mode[0]);

	return Mode[nValue];
}

string CUIMenu::ToOscillatorDetune (int nValue)
{
	string Result;

	nValue -= 7;

	if (nValue > 0)
	{
		Result = "+" + to_string (nValue);
	}
	else
	{
		Result = to_string (nValue);
	}

	return Result;
}

void CUIMenu::TGShortcutHandler (TMenuEvent Event)
{
	assert (m_nCurrentMenuDepth >= 2);
	assert (m_MenuStackMenu[0] = s_MainMenu);
	unsigned nTG = m_nMenuStackSelection[0];
	assert (nTG < CConfig::ToneGenerators);
	assert (m_nMenuStackItem[1] == nTG);
	assert (m_nMenuStackParameter[1] == nTG);

	assert (   Event == MenuEventPressAndStepDown
		|| Event == MenuEventPressAndStepUp);
	if (Event == MenuEventPressAndStepDown)
	{
		nTG--;
	}
	else
	{
		nTG++;
	}

	if (nTG < CConfig::ToneGenerators)
	{
		m_nMenuStackSelection[0] = nTG;
		m_nMenuStackItem[1] = nTG;
		m_nMenuStackParameter[1] = nTG;

		EventHandler (MenuEventUpdate);
	}
}

void CUIMenu::OPShortcutHandler (TMenuEvent Event)
{
	assert (m_nCurrentMenuDepth >= 3);
	assert (m_MenuStackMenu[m_nCurrentMenuDepth-2] = s_EditVoiceMenu);
	unsigned nOP = m_nMenuStackSelection[m_nCurrentMenuDepth-2];
	assert (nOP < 6);
	assert (m_nMenuStackItem[m_nCurrentMenuDepth-1] == nOP);
	assert (m_nMenuStackParameter[m_nCurrentMenuDepth-1] == nOP);

	assert (   Event == MenuEventPressAndStepDown
		|| Event == MenuEventPressAndStepUp);
	if (Event == MenuEventPressAndStepDown)
	{
		nOP--;
	}
	else
	{
		nOP++;
	}

	if (nOP < 6)
	{
		m_nMenuStackSelection[m_nCurrentMenuDepth-2] = nOP;
		m_nMenuStackItem[m_nCurrentMenuDepth-1] = nOP;
		m_nMenuStackParameter[m_nCurrentMenuDepth-1] = nOP;

		EventHandler (MenuEventUpdate);
	}
}

void CUIMenu::TimerHandler (TKernelTimerHandle hTimer, void *pParam, void *pContext)
{
	CUIMenu *pThis = static_cast<CUIMenu *> (pContext);
	assert (pThis);

	pThis->EventHandler (MenuEventBack);
}