Carla/source/carla_settings.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Carla settings code
# Copyright (C) 2011-2014 Filipe Coelho <falktx@falktx.com>
#
# 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 2 of
# the License, or 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.
#
# For a full copy of the GNU General Public License see the doc/GPL.txt file.

# ------------------------------------------------------------------------------------------------------------
# Imports (Config)

from carla_config import *

# ------------------------------------------------------------------------------------------------------------
# Imports (Global)

if config_UseQt5:
    from PyQt5.QtCore import pyqtSlot, QByteArray, QDir, QSettings
    from PyQt5.QtGui import QColor, QCursor, QFontMetrics, QPainter, QPainterPath
    from PyQt5.QtWidgets import QDialog, QDialogButtonBox, QFrame, QInputDialog, QLineEdit, QMenu, QVBoxLayout, QWidget
else:
    from PyQt4.QtCore import pyqtSlot, QByteArray, QDir, QSettings
    from PyQt4.QtGui import QColor, QCursor, QFontMetrics, QPainter, QPainterPath
    from PyQt4.QtGui import QDialog, QDialogButtonBox, QFrame, QInputDialog, QLineEdit, QMenu, QVBoxLayout, QWidget

# ------------------------------------------------------------------------------------------------------------
# Imports (Custom)

import ui_carla_settings
import ui_carla_settings_driver

from carla_shared import *
from patchcanvas_theme import *

# ------------------------------------------------------------------------------------------------------------
# ...

BUFFER_SIZE_LIST = (16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192)
SAMPLE_RATE_LIST = (22050, 32000, 44100, 48000, 88200, 96000, 176400, 192000)

# ------------------------------------------------------------------------------------------------------------
# Driver Settings

class DriverSettingsW(QDialog):
    def __init__(self, parent, host, driverIndex, driverName):
        QDialog.__init__(self, parent)
        self.host = host
        self.ui = ui_carla_settings_driver.Ui_DriverSettingsW()
        self.ui.setupUi(self)

        if False:
            # kdevelop likes this :)
            host = CarlaHostMeta()
            self.host = host

        # ----------------------------------------------------------------------------------------------------
        # Internal stuff

        self.fDriverIndex = driverIndex
        self.fDriverName  = driverName
        self.fDeviceNames = host.get_engine_driver_device_names(driverIndex)

        self.fBufferSizes = BUFFER_SIZE_LIST
        self.fSampleRates = SAMPLE_RATE_LIST

        # ----------------------------------------------------------------------------------------------------
        # Set-up GUI

        for name in self.fDeviceNames:
            self.ui.cb_device.addItem(name)

        # ----------------------------------------------------------------------------------------------------
        # Load settings

        self.loadSettings()

        # ----------------------------------------------------------------------------------------------------
        # Set-up connections

        self.accepted.connect(self.slot_saveSettings)
        self.ui.cb_device.currentIndexChanged.connect(self.slot_updateDeviceInfo)

        # ----------------------------------------------------------------------------------------------------

    def loadSettings(self):
        settings = QSettings("falkTX", "Carla2")

        audioDevice     = settings.value("%s%s/Device"     % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), "",                              type=str)
        audioNumPeriods = settings.value("%s%s/NumPeriods" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), CARLA_DEFAULT_AUDIO_NUM_PERIODS, type=int)
        audioBufferSize = settings.value("%s%s/BufferSize" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), CARLA_DEFAULT_AUDIO_BUFFER_SIZE, type=int)
        audioSampleRate = settings.value("%s%s/SampleRate" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), CARLA_DEFAULT_AUDIO_SAMPLE_RATE, type=int)

        if audioDevice and audioDevice in self.fDeviceNames:
            self.ui.cb_device.setCurrentIndex(self.fDeviceNames.index(audioDevice))
        else:
            self.ui.cb_device.setCurrentIndex(-1)

        # fill combo-boxes first
        self.slot_updateDeviceInfo()

        if audioNumPeriods in (2, 3):
            self.ui.sb_numperiods.setValue(audioNumPeriods)
        else:
            self.ui.sb_numperiods.setValue(CARLA_DEFAULT_AUDIO_NUM_PERIODS)

        if audioBufferSize and audioBufferSize in self.fBufferSizes:
            self.ui.cb_buffersize.setCurrentIndex(self.fBufferSizes.index(audioBufferSize))
        elif self.fBufferSizes == BUFFER_SIZE_LIST:
            self.ui.cb_buffersize.setCurrentIndex(BUFFER_SIZE_LIST.index(CARLA_DEFAULT_AUDIO_BUFFER_SIZE))
        else:
            self.ui.cb_buffersize.setCurrentIndex(len(self.fBufferSizes)/2)

        if audioSampleRate and audioSampleRate in self.fSampleRates:
            self.ui.cb_samplerate.setCurrentIndex(self.fSampleRates.index(audioSampleRate))
        elif self.fSampleRates == SAMPLE_RATE_LIST:
            self.ui.cb_samplerate.setCurrentIndex(SAMPLE_RATE_LIST.index(CARLA_DEFAULT_AUDIO_SAMPLE_RATE))
        else:
            self.ui.cb_samplerate.setCurrentIndex(len(self.fSampleRates)/2)

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_saveSettings(self):
        settings = QSettings("falkTX", "Carla2")

        settings.setValue("%s%s/Device"     % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), self.ui.cb_device.currentText())
        settings.setValue("%s%s/NumPeriods" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), self.ui.sb_numperiods.value())
        settings.setValue("%s%s/BufferSize" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), self.ui.cb_buffersize.currentText())
        settings.setValue("%s%s/SampleRate" % (CARLA_KEY_ENGINE_DRIVER_PREFIX, self.fDriverName), self.ui.cb_samplerate.currentText())

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_updateDeviceInfo(self):
        deviceName = self.ui.cb_device.currentText()

        oldBufferSize = self.ui.cb_buffersize.currentText()
        oldSampleRate = self.ui.cb_samplerate.currentText()

        self.ui.cb_buffersize.clear()
        self.ui.cb_samplerate.clear()

        if deviceName:
            driverDeviceInfo  = self.host.get_engine_driver_device_info(self.fDriverIndex, deviceName)
            self.fBufferSizes = driverDeviceInfo['bufferSizes']
            self.fSampleRates = driverDeviceInfo['sampleRates']
        else:
            self.fBufferSizes = BUFFER_SIZE_LIST
            self.fSampleRates = SAMPLE_RATE_LIST

        for bsize in self.fBufferSizes:
            sbsize = str(bsize)
            self.ui.cb_buffersize.addItem(sbsize)

            if oldBufferSize == sbsize:
                self.ui.cb_buffersize.setCurrentIndex(self.ui.cb_buffersize.count()-1)

        for srate in self.fSampleRates:
            ssrate = str(int(srate))
            self.ui.cb_samplerate.addItem(ssrate)

            if oldSampleRate == ssrate:
                self.ui.cb_samplerate.setCurrentIndex(self.ui.cb_samplerate.count()-1)

    # --------------------------------------------------------------------------------------------------------

    def done(self, r):
        QDialog.done(self, r)
        self.close()

# ------------------------------------------------------------------------------------------------------------
# Settings Dialog

class CarlaSettingsW(QDialog):
    # Tab indexes
    TAB_INDEX_MAIN   = 0
    TAB_INDEX_CANVAS = 1
    TAB_INDEX_ENGINE = 2
    TAB_INDEX_PATHS  = 3
    TAB_INDEX_NONE   = 4

    # Path indexes
    PATH_INDEX_LADSPA = 0
    PATH_INDEX_DSSI   = 1
    PATH_INDEX_LV2    = 2
    PATH_INDEX_VST    = 3
    PATH_INDEX_VST3   = 4
    PATH_INDEX_AU     = 5 if MACOS else -2
    PATH_INDEX_GIG    = 6 if MACOS else 5
    PATH_INDEX_SF2    = 7 if MACOS else 6
    PATH_INDEX_SFZ    = 8 if MACOS else 7

    # Single and Multiple client mode is only for JACK,
    # but we still want to match QComboBox index to backend defines,
    # so add +2 pos padding if driverName != "JACK".
    PROCESS_MODE_NON_JACK_PADDING = 2

    # --------------------------------------------------------------------------------------------------------

    def __init__(self, parent, host, hasCanvas, hasCanvasGL):
        QDialog.__init__(self, parent)
        self.host = host
        self.ui = ui_carla_settings.Ui_CarlaSettingsW()
        self.ui.setupUi(self)

        if False:
            # kdevelop likes this :)
            host = CarlaHostMeta()
            self.host = host

        # ----------------------------------------------------------------------------------------------------
        # Set-up GUI

        self.ui.lw_page.setFixedWidth(48 + 6 + 6 + QFontMetrics(self.ui.lw_page.font()).width("88888888"))

        for i in range(host.get_engine_driver_count()):
            self.ui.cb_engine_audio_driver.addItem(host.get_engine_driver_name(i))

        for i in range(Theme.THEME_MAX):
            self.ui.cb_canvas_theme.addItem(getThemeName(i))

        if WINDOWS and not config_UseQt5:
            self.ui.group_main_theme.setEnabled(False)

        if not MACOS:
            auIndex = self.ui.cb_paths.findText("AU")
            self.ui.cb_paths.removeItem(auIndex)
            self.ui.tw_paths.removeWidget(self.ui.tw_paths.widget(auIndex))

        if not hasCanvas:
            self.ui.lw_page.hideRow(self.TAB_INDEX_CANVAS)

        elif not hasCanvasGL:
            self.ui.cb_canvas_use_opengl.setEnabled(False)
            self.ui.cb_canvas_render_hq_aa.setEnabled(False)

        if host.isPlugin:
            self.ui.cb_engine_audio_driver.setEnabled(False)

        if host.processModeForced:
            self.ui.cb_engine_process_mode_jack.setEnabled(False)
            self.ui.cb_engine_process_mode_other.setEnabled(False)

        # FIXME, not implemented yet
        self.ui.ch_engine_uis_always_on_top.hide()

        # ----------------------------------------------------------------------------------------------------
        # Load settings

        self.loadSettings()

        # ----------------------------------------------------------------------------------------------------
        # Set-up connections

        self.accepted.connect(self.slot_saveSettings)
        self.ui.buttonBox.button(QDialogButtonBox.Reset).clicked.connect(self.slot_resetSettings)

        self.ui.b_main_proj_folder_open.clicked.connect(self.slot_getAndSetProjectPath)

        self.ui.cb_engine_audio_driver.currentIndexChanged.connect(self.slot_engineAudioDriverChanged)
        self.ui.tb_engine_driver_config.clicked.connect(self.slot_showAudioDriverSettings)

        self.ui.b_paths_add.clicked.connect(self.slot_addPluginPath)
        self.ui.b_paths_remove.clicked.connect(self.slot_removePluginPath)
        self.ui.b_paths_change.clicked.connect(self.slot_changePluginPath)
        self.ui.cb_paths.currentIndexChanged.connect(self.slot_pluginPathTabChanged)
        self.ui.lw_ladspa.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_dssi.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_lv2.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_vst.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_vst3.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_au.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_gig.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_sf2.currentRowChanged.connect(self.slot_pluginPathRowChanged)
        self.ui.lw_sfz.currentRowChanged.connect(self.slot_pluginPathRowChanged)

        # ----------------------------------------------------------------------------------------------------
        # Post-connect setup

        self.ui.lw_ladspa.setCurrentRow(0)
        self.ui.lw_dssi.setCurrentRow(0)
        self.ui.lw_lv2.setCurrentRow(0)
        self.ui.lw_vst.setCurrentRow(0)
        self.ui.lw_vst3.setCurrentRow(0)
        self.ui.lw_au.setCurrentRow(0)
        self.ui.lw_gig.setCurrentRow(0)
        self.ui.lw_sf2.setCurrentRow(0)
        self.ui.lw_sfz.setCurrentRow(0)

        self.ui.lw_page.setCurrentCell(0, 0)

    # --------------------------------------------------------------------------------------------------------

    def loadSettings(self):
        settings = QSettings("falkTX", "Carla2")

        # ----------------------------------------------------------------------------------------------------
        # Main

        self.ui.le_main_proj_folder.setText(settings.value(CARLA_KEY_MAIN_PROJECT_FOLDER, CARLA_DEFAULT_MAIN_PROJECT_FOLDER, type=str))
        self.ui.ch_main_theme_pro.setChecked(settings.value(CARLA_KEY_MAIN_USE_PRO_THEME, CARLA_DEFAULT_MAIN_USE_PRO_THEME, type=bool) and self.ui.group_main_theme.isEnabled())
        self.ui.cb_main_theme_color.setCurrentIndex(self.ui.cb_main_theme_color.findText(settings.value(CARLA_KEY_MAIN_PRO_THEME_COLOR, CARLA_DEFAULT_MAIN_PRO_THEME_COLOR, type=str)))
        self.ui.sb_main_refresh_interval.setValue(settings.value(CARLA_KEY_MAIN_REFRESH_INTERVAL, CARLA_DEFAULT_MAIN_REFRESH_INTERVAL, type=int))
        self.ui.cb_main_use_custom_skins.setChecked(settings.value(CARLA_KEY_MAIN_USE_CUSTOM_SKINS, CARLA_DEFAULT_MAIN_USE_CUSTOM_SKINS, type=bool))

        # ----------------------------------------------------------------------------------------------------
        # Canvas

        self.ui.cb_canvas_theme.setCurrentIndex(self.ui.cb_canvas_theme.findText(settings.value(CARLA_KEY_CANVAS_THEME, CARLA_DEFAULT_CANVAS_THEME, type=str)))
        self.ui.cb_canvas_size.setCurrentIndex(self.ui.cb_canvas_size.findText(settings.value(CARLA_KEY_CANVAS_SIZE, CARLA_DEFAULT_CANVAS_SIZE, type=str)))
        self.ui.cb_canvas_bezier_lines.setChecked(settings.value(CARLA_KEY_CANVAS_USE_BEZIER_LINES, CARLA_DEFAULT_CANVAS_USE_BEZIER_LINES, type=bool))
        self.ui.cb_canvas_hide_groups.setChecked(settings.value(CARLA_KEY_CANVAS_AUTO_HIDE_GROUPS, CARLA_DEFAULT_CANVAS_AUTO_HIDE_GROUPS, type=bool))
        self.ui.cb_canvas_eyecandy.setCheckState(settings.value(CARLA_KEY_CANVAS_EYE_CANDY, CARLA_DEFAULT_CANVAS_EYE_CANDY, type=int))
        self.ui.cb_canvas_use_opengl.setChecked(settings.value(CARLA_KEY_CANVAS_USE_OPENGL, CARLA_DEFAULT_CANVAS_USE_OPENGL, type=bool) and self.ui.cb_canvas_use_opengl.isEnabled())
        self.ui.cb_canvas_render_aa.setCheckState(settings.value(CARLA_KEY_CANVAS_ANTIALIASING, CARLA_DEFAULT_CANVAS_ANTIALIASING, type=int))
        self.ui.cb_canvas_render_hq_aa.setChecked(settings.value(CARLA_KEY_CANVAS_HQ_ANTIALIASING, CARLA_DEFAULT_CANVAS_HQ_ANTIALIASING, type=bool) and self.ui.cb_canvas_render_hq_aa.isEnabled())

        # ----------------------------------------------------------------------------------------------------
        # Engine

        if self.host.isPlugin:
            audioDriver = "Plugin"
            self.ui.cb_engine_audio_driver.setCurrentIndex(0)
        else:
            audioDriver = settings.value(CARLA_KEY_ENGINE_AUDIO_DRIVER, CARLA_DEFAULT_AUDIO_DRIVER, type=str)

            for i in range(self.ui.cb_engine_audio_driver.count()):
                if self.ui.cb_engine_audio_driver.itemText(i) == audioDriver:
                    self.ui.cb_engine_audio_driver.setCurrentIndex(i)
                    break
            else:
                self.ui.cb_engine_audio_driver.setCurrentIndex(-1)

        if audioDriver == "JACK":
            self.ui.sw_engine_process_mode.setCurrentIndex(0)
            self.ui.tb_engine_driver_config.setEnabled(False)
        else:
            self.ui.sw_engine_process_mode.setCurrentIndex(1)
            self.ui.tb_engine_driver_config.setEnabled(not self.host.isPlugin)

        self.ui.cb_engine_process_mode_jack.setCurrentIndex(self.host.nextProcessMode)

        if self.host.nextProcessMode >= self.PROCESS_MODE_NON_JACK_PADDING:
            self.ui.cb_engine_process_mode_other.setCurrentIndex(self.host.nextProcessMode-self.PROCESS_MODE_NON_JACK_PADDING)
        else:
            self.ui.cb_engine_process_mode_other.setCurrentIndex(0)

        self.ui.sb_engine_max_params.setValue(self.host.maxParameters)
        self.ui.ch_engine_uis_always_on_top.setChecked(self.host.uisAlwaysOnTop)
        self.ui.ch_engine_prefer_ui_bridges.setChecked(self.host.preferUIBridges)
        self.ui.sb_engine_ui_bridges_timeout.setValue(self.host.uiBridgesTimeout)
        self.ui.ch_engine_force_stereo.setChecked(self.host.forceStereo)
        self.ui.ch_engine_prefer_plugin_bridges.setChecked(self.host.preferPluginBridges)

        # ----------------------------------------------------------------------------------------------------
        # Paths

        ladspas = toList(settings.value(CARLA_KEY_PATHS_LADSPA, CARLA_DEFAULT_LADSPA_PATH))
        dssis   = toList(settings.value(CARLA_KEY_PATHS_DSSI,   CARLA_DEFAULT_DSSI_PATH))
        lv2s    = toList(settings.value(CARLA_KEY_PATHS_LV2,    CARLA_DEFAULT_LV2_PATH))
        vsts    = toList(settings.value(CARLA_KEY_PATHS_VST,    CARLA_DEFAULT_VST_PATH))
        vst3s   = toList(settings.value(CARLA_KEY_PATHS_VST3,   CARLA_DEFAULT_VST3_PATH))
        aus     = toList(settings.value(CARLA_KEY_PATHS_AU,     CARLA_DEFAULT_AU_PATH))
        gigs    = toList(settings.value(CARLA_KEY_PATHS_GIG,    CARLA_DEFAULT_GIG_PATH))
        sf2s    = toList(settings.value(CARLA_KEY_PATHS_SF2,    CARLA_DEFAULT_SF2_PATH))
        sfzs    = toList(settings.value(CARLA_KEY_PATHS_SFZ,    CARLA_DEFAULT_SFZ_PATH))

        ladspas.sort()
        dssis.sort()
        lv2s.sort()
        vsts.sort()
        vst3s.sort()
        aus.sort()
        gigs.sort()
        sf2s.sort()
        sfzs.sort()

        for ladspa in ladspas:
            if not ladspa: continue
            self.ui.lw_ladspa.addItem(ladspa)

        for dssi in dssis:
            if not dssi: continue
            self.ui.lw_dssi.addItem(dssi)

        for lv2 in lv2s:
            if not lv2: continue
            self.ui.lw_lv2.addItem(lv2)

        for vst in vsts:
            if not vst: continue
            self.ui.lw_vst.addItem(vst)

        for vst3 in vst3s:
            if not vst3: continue
            self.ui.lw_vst3.addItem(vst3)

        for au in aus:
            if not au: continue
            self.ui.lw_au.addItem(au)

        for gig in gigs:
            if not gig: continue
            self.ui.lw_gig.addItem(gig)

        for sf2 in sf2s:
            if not sf2: continue
            self.ui.lw_sf2.addItem(sf2)

        for sfz in sfzs:
            if not sfz: continue
            self.ui.lw_sfz.addItem(sfz)

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_saveSettings(self):
        settings = QSettings("falkTX", "Carla2")

        # ----------------------------------------------------------------------------------------------------
        # Main

        settings.setValue(CARLA_KEY_MAIN_PROJECT_FOLDER,   self.ui.le_main_proj_folder.text())
        settings.setValue(CARLA_KEY_MAIN_USE_PRO_THEME,    self.ui.ch_main_theme_pro.isChecked())
        settings.setValue(CARLA_KEY_MAIN_PRO_THEME_COLOR,  self.ui.cb_main_theme_color.currentText())
        settings.setValue(CARLA_KEY_MAIN_REFRESH_INTERVAL, self.ui.sb_main_refresh_interval.value())
        settings.setValue(CARLA_KEY_MAIN_USE_CUSTOM_SKINS, self.ui.cb_main_use_custom_skins.isChecked())

        # ----------------------------------------------------------------------------------------------------
        # Canvas

        settings.setValue(CARLA_KEY_CANVAS_THEME,            self.ui.cb_canvas_theme.currentText())
        settings.setValue(CARLA_KEY_CANVAS_SIZE,             self.ui.cb_canvas_size.currentText())
        settings.setValue(CARLA_KEY_CANVAS_USE_BEZIER_LINES, self.ui.cb_canvas_bezier_lines.isChecked())
        settings.setValue(CARLA_KEY_CANVAS_AUTO_HIDE_GROUPS, self.ui.cb_canvas_hide_groups.isChecked())
        settings.setValue(CARLA_KEY_CANVAS_EYE_CANDY,        self.ui.cb_canvas_eyecandy.checkState()) # 0, 1, 2 match their enum variants
        settings.setValue(CARLA_KEY_CANVAS_USE_OPENGL,       self.ui.cb_canvas_use_opengl.isChecked())
        settings.setValue(CARLA_KEY_CANVAS_HQ_ANTIALIASING,  self.ui.cb_canvas_render_hq_aa.isChecked())
        settings.setValue(CARLA_KEY_CANVAS_ANTIALIASING,     self.ui.cb_canvas_render_aa.checkState()) # 0, 1, 2 match their enum variants

        # ----------------------------------------------------------------------------------------------------
        # Engine

        audioDriver = self.ui.cb_engine_audio_driver.currentText()

        if audioDriver and not self.host.isPlugin:
            settings.setValue(CARLA_KEY_ENGINE_AUDIO_DRIVER, audioDriver)

        if not self.host.processModeForced:
            # engine sends callback if processMode really changes
            self.host.nextProcessMode = self.ui.cb_engine_process_mode_jack.currentIndex() if audioDriver == "JACK" else self.ui.cb_engine_process_mode_other.currentIndex()+self.PROCESS_MODE_NON_JACK_PADDING

            self.host.set_engine_option(ENGINE_OPTION_PROCESS_MODE, self.host.nextProcessMode, "")

            settings.setValue(CARLA_KEY_ENGINE_PROCESS_MODE, self.host.nextProcessMode)

        self.host.forceStereo         = self.ui.ch_engine_force_stereo.isChecked()
        self.host.preferPluginBridges = self.ui.ch_engine_prefer_plugin_bridges.isChecked()
        self.host.preferUIBridges     = self.ui.ch_engine_prefer_ui_bridges.isChecked()
        self.host.uisAlwaysOnTop      = self.ui.ch_engine_uis_always_on_top.isChecked()
        self.host.maxParameters       = self.ui.sb_engine_max_params.value()
        self.host.uiBridgesTimeout    = self.ui.sb_engine_ui_bridges_timeout.value()

        self.host.set_engine_option(ENGINE_OPTION_FORCE_STEREO,          self.host.forceStereo,         "")
        self.host.set_engine_option(ENGINE_OPTION_PREFER_PLUGIN_BRIDGES, self.host.preferPluginBridges, "")
        self.host.set_engine_option(ENGINE_OPTION_PREFER_UI_BRIDGES,     self.host.preferUIBridges,     "")
        self.host.set_engine_option(ENGINE_OPTION_UIS_ALWAYS_ON_TOP,     self.host.uisAlwaysOnTop,      "")
        self.host.set_engine_option(ENGINE_OPTION_MAX_PARAMETERS,        self.host.maxParameters,       "")
        self.host.set_engine_option(ENGINE_OPTION_UI_BRIDGES_TIMEOUT,    self.host.uiBridgesTimeout,    "")

        settings.setValue(CARLA_KEY_ENGINE_FORCE_STEREO,          self.host.forceStereo)
        settings.setValue(CARLA_KEY_ENGINE_PREFER_PLUGIN_BRIDGES, self.host.preferPluginBridges)
        settings.setValue(CARLA_KEY_ENGINE_PREFER_UI_BRIDGES,     self.host.preferUIBridges)
        settings.setValue(CARLA_KEY_ENGINE_UIS_ALWAYS_ON_TOP,     self.host.uisAlwaysOnTop)
        settings.setValue(CARLA_KEY_ENGINE_MAX_PARAMETERS,        self.host.maxParameters)
        settings.setValue(CARLA_KEY_ENGINE_UI_BRIDGES_TIMEOUT,    self.host.uiBridgesTimeout)

        # ----------------------------------------------------------------------------------------------------
        # Paths

        ladspas = []
        dssis   = []
        lv2s    = []
        vsts    = []
        vst3s   = []
        aus     = []
        gigs    = []
        sf2s    = []
        sfzs    = []

        for i in range(self.ui.lw_ladspa.count()):
            ladspas.append(self.ui.lw_ladspa.item(i).text())

        for i in range(self.ui.lw_dssi.count()):
            dssis.append(self.ui.lw_dssi.item(i).text())

        for i in range(self.ui.lw_lv2.count()):
            lv2s.append(self.ui.lw_lv2.item(i).text())

        for i in range(self.ui.lw_vst.count()):
            vsts.append(self.ui.lw_vst.item(i).text())

        for i in range(self.ui.lw_vst3.count()):
            vst3s.append(self.ui.lw_vst3.item(i).text())

        for i in range(self.ui.lw_au.count()):
            aus.append(self.ui.lw_au.item(i).text())

        for i in range(self.ui.lw_gig.count()):
            gigs.append(self.ui.lw_gig.item(i).text())

        for i in range(self.ui.lw_sf2.count()):
            sf2s.append(self.ui.lw_sf2.item(i).text())

        for i in range(self.ui.lw_sfz.count()):
            sfzs.append(self.ui.lw_sfz.item(i).text())

        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_LADSPA, splitter.join(ladspas))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_DSSI,   splitter.join(dssis))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_LV2,    splitter.join(lv2s))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_VST,    splitter.join(vsts))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_VST3,   splitter.join(vst3s))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_AU,     splitter.join(aus))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_GIG,    splitter.join(gigs))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_SF2,    splitter.join(sf2s))
        self.host.set_engine_option(ENGINE_OPTION_PLUGIN_PATH, PLUGIN_SFZ,    splitter.join(sfzs))

        settings.setValue(CARLA_KEY_PATHS_LADSPA, ladspas)
        settings.setValue(CARLA_KEY_PATHS_DSSI,   dssis)
        settings.setValue(CARLA_KEY_PATHS_LV2,    lv2s)
        settings.setValue(CARLA_KEY_PATHS_VST,    vsts)
        settings.setValue(CARLA_KEY_PATHS_VST3,   vst3s)
        settings.setValue(CARLA_KEY_PATHS_AU,     aus)
        settings.setValue(CARLA_KEY_PATHS_GIG,    gigs)
        settings.setValue(CARLA_KEY_PATHS_SF2,    sf2s)
        settings.setValue(CARLA_KEY_PATHS_SFZ,    sfzs)

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_resetSettings(self):
        # ----------------------------------------------------------------------------------------------------
        # Main

        if self.ui.lw_page.currentRow() == self.TAB_INDEX_MAIN:
            self.ui.le_main_proj_folder.setText(CARLA_DEFAULT_MAIN_PROJECT_FOLDER)
            self.ui.ch_main_theme_pro.setChecked(CARLA_DEFAULT_MAIN_USE_PRO_THEME and self.ui.group_main_theme.isEnabled())
            self.ui.cb_main_theme_color.setCurrentIndex(self.ui.cb_main_theme_color.findText(CARLA_DEFAULT_MAIN_PRO_THEME_COLOR))
            self.ui.sb_main_refresh_interval.setValue(CARLA_DEFAULT_MAIN_REFRESH_INTERVAL)
            self.ui.cb_main_use_custom_skins.setChecked(CARLA_DEFAULT_MAIN_USE_CUSTOM_SKINS)

        # ----------------------------------------------------------------------------------------------------
        # Canvas

        elif self.ui.lw_page.currentRow() == self.TAB_INDEX_CANVAS:
            self.ui.cb_canvas_theme.setCurrentIndex(self.ui.cb_canvas_theme.findText(CARLA_DEFAULT_CANVAS_THEME))
            self.ui.cb_canvas_size.setCurrentIndex(self.ui.cb_canvas_size.findText(CARLA_DEFAULT_CANVAS_SIZE))
            self.ui.cb_canvas_bezier_lines.setChecked(CARLA_DEFAULT_CANVAS_USE_BEZIER_LINES)
            self.ui.cb_canvas_hide_groups.setChecked(CARLA_DEFAULT_CANVAS_AUTO_HIDE_GROUPS)
            self.ui.cb_canvas_eyecandy.setCheckState(Qt.PartiallyChecked) # CARLA_DEFAULT_CANVAS_EYE_CANDY
            self.ui.cb_canvas_use_opengl.setChecked(CARLA_DEFAULT_CANVAS_USE_OPENGL and self.ui.cb_canvas_use_opengl.isEnabled())
            self.ui.cb_canvas_render_aa.setCheckState(Qt.PartiallyChecked) # CARLA_DEFAULT_CANVAS_ANTIALIASING
            self.ui.cb_canvas_render_hq_aa.setChecked(CARLA_DEFAULT_CANVAS_HQ_ANTIALIASING and self.ui.cb_canvas_render_hq_aa.isEnabled())

        # ----------------------------------------------------------------------------------------------------
        # Engine

        elif self.ui.lw_page.currentRow() == self.TAB_INDEX_ENGINE:
            if not self.host.isPlugin:
                self.ui.cb_engine_audio_driver.setCurrentIndex(0)

            if not self.host.processModeForced:
                if self.ui.cb_engine_audio_driver.currentText() == "JACK":
                    self.ui.cb_engine_process_mode_jack.setCurrentIndex(CARLA_DEFAULT_PROCESS_MODE)
                    self.ui.sw_engine_process_mode.setCurrentIndex(0) # show all modes
                else:
                    self.ui.cb_engine_process_mode_other.setCurrentIndex(CARLA_DEFAULT_PROCESS_MODE-self.PROCESS_MODE_NON_JACK_PADDING)
                    self.ui.sw_engine_process_mode.setCurrentIndex(1) # hide single+multi client modes

            self.ui.sb_engine_max_params.setValue(CARLA_DEFAULT_MAX_PARAMETERS)
            self.ui.ch_engine_uis_always_on_top.setChecked(CARLA_DEFAULT_UIS_ALWAYS_ON_TOP)
            self.ui.ch_engine_prefer_ui_bridges.setChecked(CARLA_DEFAULT_PREFER_UI_BRIDGES)
            self.ui.sb_engine_ui_bridges_timeout.setValue(CARLA_DEFAULT_UI_BRIDGES_TIMEOUT)
            self.ui.ch_engine_force_stereo.setChecked(CARLA_DEFAULT_FORCE_STEREO)
            self.ui.ch_engine_prefer_plugin_bridges.setChecked(CARLA_DEFAULT_PREFER_PLUGIN_BRIDGES)

        # ----------------------------------------------------------------------------------------------------
        # Paths

        elif self.ui.lw_page.currentRow() == self.TAB_INDEX_PATHS:
            curIndex = self.ui.tw_paths.currentIndex()

            if curIndex == self.PATH_INDEX_LADSPA:
                paths = CARLA_DEFAULT_LADSPA_PATH
                paths.sort()
                self.ui.lw_ladspa.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_ladspa.addItem(path)

            elif curIndex == self.PATH_INDEX_DSSI:
                paths = CARLA_DEFAULT_DSSI_PATH
                paths.sort()
                self.ui.lw_dssi.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_dssi.addItem(path)

            elif curIndex == self.PATH_INDEX_LV2:
                paths = CARLA_DEFAULT_LV2_PATH
                paths.sort()
                self.ui.lw_lv2.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_lv2.addItem(path)

            elif curIndex == self.PATH_INDEX_VST:
                paths = CARLA_DEFAULT_VST_PATH
                paths.sort()
                self.ui.lw_vst.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_vst.addItem(path)

            elif curIndex == self.PATH_INDEX_VST3:
                paths = CARLA_DEFAULT_VST3_PATH
                paths.sort()
                self.ui.lw_vst3.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_vst3.addItem(path)

            elif curIndex == self.PATH_INDEX_AU:
                paths = CARLA_DEFAULT_AU_PATH
                paths.sort()
                self.ui.lw_au.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_au.addItem(path)

            elif curIndex == self.PATH_INDEX_GIG:
                paths = CARLA_DEFAULT_GIG_PATH
                paths.sort()
                self.ui.lw_gig.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_gig.addItem(path)

            elif curIndex == self.PATH_INDEX_SF2:
                paths = CARLA_DEFAULT_SF2_PATH
                paths.sort()
                self.ui.lw_sf2.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_sf2.addItem(path)

            elif curIndex == self.PATH_INDEX_SFZ:
                paths = CARLA_DEFAULT_SFZ_PATH
                paths.sort()
                self.ui.lw_sfz.clear()

                for path in paths:
                    if not path: continue
                    self.ui.lw_sfz.addItem(path)

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_getAndSetProjectPath(self):
        # FIXME
        getAndSetPath(self, self.ui.le_main_proj_folder)

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_engineAudioDriverChanged(self):
        if self.ui.cb_engine_audio_driver.currentText() == "JACK":
            self.ui.sw_engine_process_mode.setCurrentIndex(0)
            self.ui.tb_engine_driver_config.setEnabled(False)
        else:
            self.ui.sw_engine_process_mode.setCurrentIndex(1)
            self.ui.tb_engine_driver_config.setEnabled(True)

    @pyqtSlot()
    def slot_showAudioDriverSettings(self):
        driverIndex = self.ui.cb_engine_audio_driver.currentIndex()
        driverName  = self.ui.cb_engine_audio_driver.currentText()
        DriverSettingsW(self, self.host, driverIndex, driverName).exec_()

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot()
    def slot_addPluginPath(self):
        newPath = QFileDialog.getExistingDirectory(self, self.tr("Add Path"), "", QFileDialog.ShowDirsOnly)

        if not newPath:
            return

        curIndex = self.ui.tw_paths.currentIndex()

        if curIndex == self.PATH_INDEX_LADSPA:
            self.ui.lw_ladspa.addItem(newPath)
        elif curIndex == self.PATH_INDEX_DSSI:
            self.ui.lw_dssi.addItem(newPath)
        elif curIndex == self.PATH_INDEX_LV2:
            self.ui.lw_lv2.addItem(newPath)
        elif curIndex == self.PATH_INDEX_VST:
            self.ui.lw_vst.addItem(newPath)
        elif curIndex == self.PATH_INDEX_VST3:
            self.ui.lw_vst3.addItem(newPath)
        elif curIndex == self.PATH_INDEX_AU:
            self.ui.lw_au.addItem(newPath)
        elif curIndex == self.PATH_INDEX_GIG:
            self.ui.lw_gig.addItem(newPath)
        elif curIndex == self.PATH_INDEX_SF2:
            self.ui.lw_sf2.addItem(newPath)
        elif curIndex == self.PATH_INDEX_SFZ:
            self.ui.lw_sfz.addItem(newPath)

    @pyqtSlot()
    def slot_removePluginPath(self):
        curIndex = self.ui.tw_paths.currentIndex()

        if curIndex == self.PATH_INDEX_LADSPA:
            self.ui.lw_ladspa.takeItem(self.ui.lw_ladspa.currentRow())
        elif curIndex == self.PATH_INDEX_DSSI:
            self.ui.lw_dssi.takeItem(self.ui.lw_dssi.currentRow())
        elif curIndex == self.PATH_INDEX_LV2:
            self.ui.lw_lv2.takeItem(self.ui.lw_lv2.currentRow())
        elif curIndex == self.PATH_INDEX_VST:
            self.ui.lw_vst.takeItem(self.ui.lw_vst.currentRow())
        elif curIndex == self.PATH_INDEX_VST3:
            self.ui.lw_vst3.takeItem(self.ui.lw_vst3.currentRow())
        elif curIndex == self.PATH_INDEX_AU:
            self.ui.lw_au.takeItem(self.ui.lw_au.currentRow())
        elif curIndex == self.PATH_INDEX_GIG:
            self.ui.lw_gig.takeItem(self.ui.lw_gig.currentRow())
        elif curIndex == self.PATH_INDEX_SF2:
            self.ui.lw_sf2.takeItem(self.ui.lw_sf2.currentRow())
        elif curIndex == self.PATH_INDEX_SFZ:
            self.ui.lw_sfz.takeItem(self.ui.lw_sfz.currentRow())

    @pyqtSlot()
    def slot_changePluginPath(self):
        curIndex = self.ui.tw_paths.currentIndex()

        if curIndex == self.PATH_INDEX_LADSPA:
            currentPath = self.ui.lw_ladspa.currentItem().text()
        elif curIndex == self.PATH_INDEX_DSSI:
            currentPath = self.ui.lw_dssi.currentItem().text()
        elif curIndex == self.PATH_INDEX_LV2:
            currentPath = self.ui.lw_lv2.currentItem().text()
        elif curIndex == self.PATH_INDEX_VST:
            currentPath = self.ui.lw_vst.currentItem().text()
        elif curIndex == self.PATH_INDEX_VST3:
            currentPath = self.ui.lw_vst3.currentItem().text()
        elif curIndex == self.PATH_INDEX_AU:
            currentPath = self.ui.lw_au.currentItem().text()
        elif curIndex == self.PATH_INDEX_GIG:
            currentPath = self.ui.lw_gig.currentItem().text()
        elif curIndex == self.PATH_INDEX_SF2:
            currentPath = self.ui.lw_sf2.currentItem().text()
        elif curIndex == self.PATH_INDEX_SFZ:
            currentPath = self.ui.lw_sfz.currentItem().text()
        else:
            currentPath = ""

        newPath = QFileDialog.getExistingDirectory(self, self.tr("Add Path"), currentPath, QFileDialog.ShowDirsOnly)

        if not newPath:
            return

        if curIndex == self.PATH_INDEX_LADSPA:
            self.ui.lw_ladspa.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_DSSI:
            self.ui.lw_dssi.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_LV2:
            self.ui.lw_lv2.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_VST:
            self.ui.lw_vst.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_VST3:
            self.ui.lw_vst3.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_AU:
            self.ui.lw_au.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_GIG:
            self.ui.lw_gig.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_SF2:
            self.ui.lw_sf2.currentItem().setText(newPath)
        elif curIndex == self.PATH_INDEX_SFZ:
            self.ui.lw_sfz.currentItem().setText(newPath)

    # --------------------------------------------------------------------------------------------------------

    @pyqtSlot(int)
    def slot_pluginPathTabChanged(self, index):
        if index == self.PATH_INDEX_LADSPA:
            row = self.ui.lw_ladspa.currentRow()
        elif index == self.PATH_INDEX_DSSI:
            row = self.ui.lw_dssi.currentRow()
        elif index == self.PATH_INDEX_LV2:
            row = self.ui.lw_lv2.currentRow()
        elif index == self.PATH_INDEX_VST:
            row = self.ui.lw_vst.currentRow()
        elif index == self.PATH_INDEX_VST3:
            row = self.ui.lw_vst3.currentRow()
        elif index == self.PATH_INDEX_AU:
            row = self.ui.lw_au.currentRow()
        elif index == self.PATH_INDEX_GIG:
            row = self.ui.lw_gig.currentRow()
        elif index == self.PATH_INDEX_SF2:
            row = self.ui.lw_sf2.currentRow()
        elif index == self.PATH_INDEX_SFZ:
            row = self.ui.lw_sfz.currentRow()
        else:
            row = -1

        check = bool(row >= 0)
        self.ui.b_paths_remove.setEnabled(check)
        self.ui.b_paths_change.setEnabled(check)

    @pyqtSlot(int)
    def slot_pluginPathRowChanged(self, row):
        check = bool(row >= 0)
        self.ui.b_paths_remove.setEnabled(check)
        self.ui.b_paths_change.setEnabled(check)

    # --------------------------------------------------------------------------------------------------------

    def done(self, r):
        QDialog.done(self, r)
        self.close()

# ------------------------------------------------------------------------------------------------------------
# Main

if __name__ == '__main__':
    from carla_app import CarlaApplication
    from carla_host import initHost, loadHostSettings

    app  = CarlaApplication()
    host = initHost("Settings", None, False, False, False)
    loadHostSettings(host)

    gui = CarlaSettingsW(None, host, True, True)
    gui.show()

    app.exit_exec()

# ------------------------------------------------------------------------------------------------------------