Carla/source/frontend/carla_widgets.py

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

# Carla widgets code
# Copyright (C) 2011-2020 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 (Global)

from PyQt5.QtCore import pyqtSignal, pyqtSlot, Qt, QByteArray, QTimer
from PyQt5.QtGui import QColor, QCursor, QFontMetrics, QPainter, QPainterPath, QPalette, QPixmap
from PyQt5.QtWidgets import QDialog, QGroupBox, QInputDialog, QLineEdit, QMenu, QScrollArea, QVBoxLayout, QWidget

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

import ui_carla_about
import ui_carla_about_juce
import ui_carla_edit
import ui_carla_parameter

from carla_shared import *
from carla_utils import *
from widgets.collapsablewidget import CollapsibleBox
from widgets.paramspinbox import CustomInputDialog
from widgets.pixmapkeyboard import PixmapKeyboardHArea

# ------------------------------------------------------------------------------------------------------------
# Carla GUI defines

ICON_STATE_ON   = 3 # turns on, sets as wait
ICON_STATE_WAIT = 2 # nothing, sets as off
ICON_STATE_OFF  = 1 # turns off, sets as null
ICON_STATE_NULL = 0 # nothing

# ------------------------------------------------------------------------------------------------------------
# Carla About dialog

class CarlaAboutW(QDialog):
    def __init__(self, parent, host):
        QDialog.__init__(self, parent)
        self.ui = ui_carla_about.Ui_CarlaAboutW()
        self.ui.setupUi(self)

        if False:
            # kdevelop likes this :)
            host = CarlaHostNull()

        if host.isControl:
            extraInfo = " - <b>%s</b>" % self.tr("OSC Bridge Version")
        elif host.isPlugin:
            extraInfo = " - <b>%s</b>" % self.tr("Plugin Version")
        else:
            extraInfo = ""

        self.ui.l_about.setText(self.tr(""
                                     "<br>Version %s"
                                     "<br>Carla is a fully-featured audio plugin host%s.<br>"
                                     "<br>Copyright (C) 2011-2020 falkTX<br>"
                                     "" % (VERSION, extraInfo)))

        if self.ui.about.palette().color(QPalette.Background).blackF() < 0.5:
            self.ui.l_icons.setPixmap(QPixmap(":/bitmaps/carla_about_black.png"))
            self.ui.ico_example_edit.setPixmap(QPixmap(":/bitmaps/button_file-black.png"))
            self.ui.ico_example_file.setPixmap(QPixmap(":/bitmaps/button_edit-black.png"))
            self.ui.ico_example_gui.setPixmap(QPixmap(":/bitmaps/button_gui-black.png"))

        if host.isControl:
            self.ui.l_extended.hide()
            self.ui.tabWidget.removeTab(3)
            self.ui.tabWidget.removeTab(2)

        self.ui.l_extended.setText(gCarla.utils.get_complete_license_text())

        if host.is_engine_running() and not host.isControl:
            self.ui.le_osc_url_tcp.setText(host.get_host_osc_url_tcp())
            self.ui.le_osc_url_udp.setText(host.get_host_osc_url_udp())
        else:
            self.ui.le_osc_url_tcp.setText(self.tr("(Engine not running)"))
            self.ui.le_osc_url_udp.setText(self.tr("(Engine not running)"))

        self.ui.l_osc_cmds.setText("<table>"
                                   "<tr><td>" "/set_active"                 "&nbsp;</td><td>&lt;i-value&gt;</td></tr>"
                                   "<tr><td>" "/set_drywet"                 "&nbsp;</td><td>&lt;f-value&gt;</td></tr>"
                                   "<tr><td>" "/set_volume"                 "&nbsp;</td><td>&lt;f-value&gt;</td></tr>"
                                   "<tr><td>" "/set_balance_left"           "&nbsp;</td><td>&lt;f-value&gt;</td></tr>"
                                   "<tr><td>" "/set_balance_right"          "&nbsp;</td><td>&lt;f-value&gt;</td></tr>"
                                   "<tr><td>" "/set_panning"                "&nbsp;</td><td>&lt;f-value&gt;</td></tr>"
                                   "<tr><td>" "/set_parameter_value"        "&nbsp;</td><td>&lt;i-index&gt; &lt;f-value&gt;</td></tr>"
                                   "<tr><td>" "/set_parameter_midi_cc"      "&nbsp;</td><td>&lt;i-index&gt; &lt;i-cc&gt;</td></tr>"
                                   "<tr><td>" "/set_parameter_midi_channel" "&nbsp;</td><td>&lt;i-index&gt; &lt;i-channel&gt;</td></tr>"
                                   "<tr><td>" "/set_program"                "&nbsp;</td><td>&lt;i-index&gt;</td></tr>"
                                   "<tr><td>" "/set_midi_program"           "&nbsp;</td><td>&lt;i-index&gt;</td></tr>"
                                   "<tr><td>" "/note_on"                    "&nbsp;</td><td>&lt;i-channel&gt; &lt;i-note&gt; &lt;i-velo&gt;</td></tr>"
                                   "<tr><td>" "/note_off"                   "&nbsp;</td><td>&lt;i-channel&gt; &lt;i-note</td></tr>"
                                   "</table>"
                                  )

        self.ui.l_example.setText("/Carla/2/set_parameter_value 5 1.0")
        self.ui.l_example_help.setText("<i>(as in this example, \"2\" is the plugin number and \"5\" the parameter)</i>")

        self.ui.l_ladspa.setText(self.tr("Everything! (Including LRDF)"))
        self.ui.l_dssi.setText(self.tr("Everything! (Including CustomData/Chunks)"))
        self.ui.l_lv2.setText(self.tr("About 110&#37; complete (using custom extensions)<br/>"
                                      "Implemented Feature/Extensions:"
                                      "<ul>"
                                      "<li>http://lv2plug.in/ns/ext/atom</li>"
                                      "<li>http://lv2plug.in/ns/ext/buf-size</li>"
                                      "<li>http://lv2plug.in/ns/ext/data-access</li>"
                                      #"<li>http://lv2plug.in/ns/ext/dynmanifest</li>"
                                      "<li>http://lv2plug.in/ns/ext/event</li>"
                                      "<li>http://lv2plug.in/ns/ext/instance-access</li>"
                                      "<li>http://lv2plug.in/ns/ext/log</li>"
                                      "<li>http://lv2plug.in/ns/ext/midi</li>"
                                      #"<li>http://lv2plug.in/ns/ext/morph</li>"
                                      "<li>http://lv2plug.in/ns/ext/options</li>"
                                      "<li>http://lv2plug.in/ns/ext/parameters</li>"
                                      #"<li>http://lv2plug.in/ns/ext/patch</li>"
                                      "<li>http://lv2plug.in/ns/ext/port-props</li>"
                                      "<li>http://lv2plug.in/ns/ext/presets</li>"
                                      "<li>http://lv2plug.in/ns/ext/resize-port</li>"
                                      "<li>http://lv2plug.in/ns/ext/state</li>"
                                      "<li>http://lv2plug.in/ns/ext/time</li>"
                                      "<li>http://lv2plug.in/ns/ext/uri-map</li>"
                                      "<li>http://lv2plug.in/ns/ext/urid</li>"
                                      "<li>http://lv2plug.in/ns/ext/worker</li>"
                                      "<li>http://lv2plug.in/ns/extensions/ui</li>"
                                      "<li>http://lv2plug.in/ns/extensions/units</li>"
                                      "<li>http://home.gna.org/lv2dynparam/rtmempool/v1</li>"
                                      "<li>http://kxstudio.sf.net/ns/lv2ext/external-ui</li>"
                                      "<li>http://kxstudio.sf.net/ns/lv2ext/programs</li>"
                                      "<li>http://kxstudio.sf.net/ns/lv2ext/props</li>"
                                      "<li>http://kxstudio.sf.net/ns/lv2ext/rtmempool</li>"
                                      "<li>http://ll-plugins.nongnu.org/lv2/ext/midimap</li>"
                                      "<li>http://ll-plugins.nongnu.org/lv2/ext/miditype</li>"
                                      "</ul>"))

        usingJuce = "juce" in gCarla.utils.get_supported_features()

        if usingJuce and (MACOS or WINDOWS):
            self.ui.l_vst2.setText(self.tr("Using JUCE host"))
            self.ui.l_vst3.setText(self.tr("Using JUCE host"))
        else:
            self.ui.l_vst2.setText(self.tr("About 85&#37; complete (missing vst bank/presets and some minor stuff)"))
            self.ui.line_vst2.hide()
            self.ui.l_vst3.hide()
            self.ui.lid_vst3.hide()

        if MACOS:
            self.ui.l_au.setText(self.tr("Using JUCE host"))
        else:
            self.ui.line_vst3.hide()
            self.ui.l_au.hide()
            self.ui.lid_au.hide()

        # 3rd tab is usually longer than the 1st
        # adjust appropriately
        self.ui.tabWidget.setCurrentIndex(2)
        self.adjustSize()
        self.ui.tabWidget.setCurrentIndex(0)

        self.setFixedSize(self.size())

        flags  = self.windowFlags()
        flags &= ~Qt.WindowContextHelpButtonHint

        if WINDOWS:
            flags |= Qt.MSWindowsFixedSizeDialogHint

        self.setWindowFlags(flags)

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

# ------------------------------------------------------------------------------------------------------------
# JUCE About dialog

class JuceAboutW(QDialog):
    def __init__(self, parent):
        QDialog.__init__(self, parent)
        self.ui = ui_carla_about_juce.Ui_JuceAboutW()
        self.ui.setupUi(self)

        self.ui.l_text2.setText(self.tr("This program uses JUCE version %s." % gCarla.utils.get_juce_version()))

        self.adjustSize()
        self.setFixedSize(self.size())

        flags  = self.windowFlags()
        flags &= ~Qt.WindowContextHelpButtonHint

        if WINDOWS:
            flags |= Qt.MSWindowsFixedSizeDialogHint

        self.setWindowFlags(flags)

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

# ------------------------------------------------------------------------------------------------------------
# Plugin Parameter

class PluginParameter(QWidget):
    mappedControlChanged = pyqtSignal(int, int)
    mappedRangeChanged   = pyqtSignal(int, float, float)
    midiChannelChanged   = pyqtSignal(int, int)
    valueChanged         = pyqtSignal(int, float)

    def __init__(self, parent, host, pInfo, pluginId, tabIndex):
        QWidget.__init__(self, parent)
        self.host = host
        self.ui = ui_carla_parameter.Ui_PluginParameter()
        self.ui.setupUi(self)

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

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

        self.fDecimalPoints = max(2, countDecimalPoints(pInfo['step'], pInfo['stepSmall']))
        self.fCanBeInCV     = pInfo['hints'] & PARAMETER_CAN_BE_CV_CONTROLLED
        self.fMappedCtrl    = pInfo['mappedControlIndex']
        self.fMappedMinimum = pInfo['mappedMinimum']
        self.fMappedMaximum = pInfo['mappedMaximum']
        self.fMinimum       = pInfo['minimum']
        self.fMaximum       = pInfo['maximum']
        self.fMidiChannel   = pInfo['midiChannel']
        self.fParameterId   = pInfo['index']
        self.fPluginId      = pluginId
        self.fTabIndex      = tabIndex

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

        pType  = pInfo['type']
        pHints = pInfo['hints']

        self.ui.label.setText(pInfo['name'])
        self.ui.widget.setName(pInfo['name'])
        self.ui.widget.setMinimum(pInfo['minimum'])
        self.ui.widget.setMaximum(pInfo['maximum'])
        self.ui.widget.setDefault(pInfo['default'])
        self.ui.widget.setLabel(pInfo['unit'])
        self.ui.widget.setStep(pInfo['step'])
        self.ui.widget.setStepSmall(pInfo['stepSmall'])
        self.ui.widget.setStepLarge(pInfo['stepLarge'])
        self.ui.widget.setScalePoints(pInfo['scalePoints'], bool(pHints & PARAMETER_USES_SCALEPOINTS))

        if pInfo['comment']:
            self.ui.label.setToolTip(pInfo['comment'])
            self.ui.widget.setToolTip(pInfo['comment'])

        if pType == PARAMETER_INPUT:
            if not pHints & PARAMETER_IS_ENABLED:
                self.ui.label.setEnabled(False)
                self.ui.widget.setEnabled(False)
                self.ui.widget.setReadOnly(True)
                self.ui.tb_options.setEnabled(False)

            elif not pHints & PARAMETER_IS_AUTOMABLE:
                self.ui.tb_options.setEnabled(False)

            if pHints & PARAMETER_IS_READ_ONLY:
                self.ui.widget.setReadOnly(True)
                self.ui.tb_options.setEnabled(False)

        elif pType == PARAMETER_OUTPUT:
            self.ui.widget.setReadOnly(True)

        else:
            self.ui.widget.setVisible(False)
            self.ui.tb_options.setVisible(False)

        # Only set value after all hints are handled
        self.ui.widget.setValue(pInfo['current'])

        if pHints & PARAMETER_USES_CUSTOM_TEXT and not host.isPlugin:
            self.ui.widget.setTextCallback(self._textCallBack)

        self.ui.widget.setValueCallback(self._valueCallBack)
        self.ui.widget.updateAll()

        self.setMappedControlIndex(pInfo['mappedControlIndex'])
        self.setMidiChannel(pInfo['midiChannel'])

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

        self.ui.tb_options.clicked.connect(self.slot_optionsCustomMenu)
        self.ui.widget.dragStateChanged.connect(self.slot_parameterDragStateChanged)

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

    def getPluginId(self):
        return self.fPluginId

    def getTabIndex(self):
        return self.fTabIndex

    def setPluginId(self, pluginId):
        self.fPluginId = pluginId

    def setDefault(self, value):
        self.ui.widget.setDefault(value)

    def setValue(self, value):
        self.ui.widget.blockSignals(True)
        self.ui.widget.setValue(value)
        self.ui.widget.blockSignals(False)

    def setMappedControlIndex(self, control):
        self.fMappedCtrl = control

    def setMappedRange(self, minimum, maximum):
        self.fMappedMinimum = minimum
        self.fMappedMaximum = maximum

    def setMidiChannel(self, channel):
        self.fMidiChannel = channel

    def setLabelWidth(self, width):
        self.ui.label.setFixedWidth(width)

    @pyqtSlot()
    def slot_optionsCustomMenu(self):
        menu = QMenu(self)

        if self.fMappedCtrl == CONTROL_VALUE_NONE:
            title = self.tr("Unmapped")
        elif self.fMappedCtrl == CONTROL_VALUE_CV:
            title = self.tr("Exposed as CV port")
        else:
            title = self.tr("Mapped to MIDI control %i, channel %i" % (self.fMappedCtrl, self.fMidiChannel))

        if self.fMappedCtrl != CONTROL_VALUE_NONE:
            title += " (range: %g-%g)" % (self.fMappedMinimum, self.fMappedMaximum)

        actTitle = menu.addAction(title)
        actTitle.setEnabled(False)

        menu.addSeparator()

        actUnmap = menu.addAction(self.tr("Unmap"))

        if self.fMappedCtrl == CONTROL_VALUE_NONE:
            actUnmap.setCheckable(True)
            actUnmap.setChecked(True)

        if self.fCanBeInCV:
            menu.addSection("CV")
            actCV = menu.addAction(self.tr("Expose as CV port"))
            if self.fMappedCtrl == CONTROL_VALUE_CV:
                actCV.setCheckable(True)
                actCV.setChecked(True)
        else:
            actCV = None

        menu.addSection("MIDI")

        menuMIDI = menu.addMenu(self.tr("MIDI Control"))

        if self.fMappedCtrl not in (CONTROL_VALUE_NONE, CONTROL_VALUE_CV, CONTROL_VALUE_MIDI_PITCHBEND):
            action = menuMIDI.menuAction()
            action.setCheckable(True)
            action.setChecked(True)

        inlist = False
        actCCs = []
        for cc in MIDI_CC_LIST:
            action = menuMIDI.addAction(cc)
            actCCs.append(action)

            if self.fMappedCtrl >= 0 and self.fMappedCtrl <= MAX_MIDI_CC_LIST_ITEM:
                ccx = int(cc.split(" [", 1)[0], 10)

                if ccx > self.fMappedCtrl and not inlist:
                    inlist = True
                    action = menuMIDI.addAction(self.tr("%02i [0x%02X] (Custom)" % (self.fMappedCtrl, self.fMappedCtrl)))
                    action.setCheckable(True)
                    action.setChecked(True)
                    actCCs.append(action)

                elif ccx == self.fMappedCtrl:
                    inlist = True
                    action.setCheckable(True)
                    action.setChecked(True)

        if self.fMappedCtrl > MAX_MIDI_CC_LIST_ITEM and self.fMappedCtrl <= 0x77:
            action = menuMIDI.addAction(self.tr("%02i [0x%02X] (Custom)" % (self.fMappedCtrl, self.fMappedCtrl)))
            action.setCheckable(True)
            action.setChecked(True)
            actCCs.append(action)

        actCustomCC = menuMIDI.addAction(self.tr("Custom..."))

        # TODO
        #actPitchbend = menu.addAction(self.tr("MIDI Pitchbend"))

        #if self.fMappedCtrl == CONTROL_VALUE_MIDI_PITCHBEND:
            #actPitchbend.setCheckable(True)
            #actPitchbend.setChecked(True)

        menuChannel = menu.addMenu(self.tr("MIDI Channel"))

        actChannels = []
        for i in range(1, 16+1):
            action = menuChannel.addAction("%i" % i)
            actChannels.append(action)

            if self.fMidiChannel == i:
                action.setCheckable(True)
                action.setChecked(True)

        if self.fMappedCtrl != CONTROL_VALUE_NONE:
            if self.fMappedCtrl == CONTROL_VALUE_CV:
                menu.addSection("Range (Scaled CV input)")
            else:
                menu.addSection("Range (MIDI bounds)")
            actRangeMinimum = menu.addAction(self.tr("Set minimum... (%g)" % self.fMappedMinimum))
            actRangeMaximum = menu.addAction(self.tr("Set maximum... (%g)" % self.fMappedMaximum))
        else:
            actRangeMinimum = actRangeMaximum = None

        actSel = menu.exec_(QCursor.pos())

        if not actSel:
            return

        if actSel in actChannels:
            channel = int(actSel.text())
            self.fMidiChannel = channel
            self.midiChannelChanged.emit(self.fParameterId, channel)
            return

        if actSel == actRangeMinimum:
            value, ok = QInputDialog.getDouble(self,
                                               self.tr("Custom Minimum"),
                                               "Custom minimum value to use:",
                                               self.fMappedMinimum,
                                               self.fMinimum if self.fMappedCtrl != CONTROL_VALUE_CV else -9e6,
                                               self.fMaximum if self.fMappedCtrl != CONTROL_VALUE_CV else 9e6,
                                               self.fDecimalPoints)
            if not ok:
                return

            self.fMappedMinimum = value
            self.mappedRangeChanged.emit(self.fParameterId, self.fMappedMinimum, self.fMappedMaximum)
            return

        if actSel == actRangeMaximum:
            value, ok = QInputDialog.getDouble(self,
                                               self.tr("Custom Maximum"),
                                               "Custom maximum value to use:",
                                               self.fMappedMaximum,
                                               self.fMinimum if self.fMappedCtrl != CONTROL_VALUE_CV else -9e6,
                                               self.fMaximum if self.fMappedCtrl != CONTROL_VALUE_CV else 9e6,
                                               self.fDecimalPoints)
            if not ok:
                return

            self.fMappedMaximum = value
            self.mappedRangeChanged.emit(self.fParameterId, self.fMappedMinimum, self.fMappedMaximum)
            return

        if actSel == actUnmap:
            ctrl = CONTROL_VALUE_NONE
        elif actSel == actCV:
            ctrl = CONTROL_VALUE_CV
        elif actSel in actCCs:
            ctrl = int(actSel.text().split(" ", 1)[0].replace("&",""), 10)
        elif actSel == actCustomCC:
            ctrl, ok = QInputDialog.getInt(self,
                                           self.tr("Custom CC"),
                                           "Custom MIDI CC to use:",
                                           self.fMappedCtrl if self.fMappedCtrl >= 0x01 and self.fMappedCtrl <= 0x77 else 1,
                                           0x01, 0x77, 1)
            if not ok:
                return
        #elif actSel in actPitchbend:
            #ctrl = CONTROL_VALUE_MIDI_PITCHBEND
        else:
            return

        self.fMappedCtrl = ctrl
        self.mappedControlChanged.emit(self.fParameterId, ctrl)

    @pyqtSlot(bool)
    def slot_parameterDragStateChanged(self, touch):
        self.host.set_parameter_touch(self.fPluginId, self.fParameterId, touch)

    def _textCallBack(self):
        return self.host.get_parameter_text(self.fPluginId, self.fParameterId)

    def _valueCallBack(self, value):
        self.valueChanged.emit(self.fParameterId, value)

# ------------------------------------------------------------------------------------------------------------
# Plugin Editor Parent (Meta class)

class PluginEditParentMeta():
#class PluginEditParentMeta(metaclass=ABCMeta):
    @abstractmethod
    def editDialogVisibilityChanged(self, pluginId, visible):
        raise NotImplementedError

    @abstractmethod
    def editDialogPluginHintsChanged(self, pluginId, hints):
        raise NotImplementedError

    @abstractmethod
    def editDialogParameterValueChanged(self, pluginId, parameterId, value):
        raise NotImplementedError

    @abstractmethod
    def editDialogProgramChanged(self, pluginId, index):
        raise NotImplementedError

    @abstractmethod
    def editDialogMidiProgramChanged(self, pluginId, index):
        raise NotImplementedError

    @abstractmethod
    def editDialogNotePressed(self, pluginId, note):
        raise NotImplementedError

    @abstractmethod
    def editDialogNoteReleased(self, pluginId, note):
        raise NotImplementedError

    @abstractmethod
    def editDialogMidiActivityChanged(self, pluginId, onOff):
        raise NotImplementedError

# ------------------------------------------------------------------------------------------------------------
# Plugin Editor (Built-in)

class PluginEdit(QDialog):
    # signals
    SIGTERM = pyqtSignal()
    SIGUSR1 = pyqtSignal()

    def __init__(self, parent, host, pluginId):
        QDialog.__init__(self, parent.window() if parent is not None else None)
        self.host = host
        self.ui = ui_carla_edit.Ui_PluginEdit()
        self.ui.setupUi(self)

        if False:
            # kdevelop likes this :)
            parent = PluginEditParentMeta()
            host = CarlaHostNull()
            self.host = host

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

        self.fGeometry   = QByteArray()
        self.fParent     = parent
        self.fPluginId   = pluginId
        self.fPluginInfo = None

        self.fCurrentStateFilename = None
        self.fControlChannel = round(host.get_internal_parameter_value(pluginId, PARAMETER_CTRL_CHANNEL))
        self.fFirstInit      = True

        self.fParameterList      = [] # (type, id, widget)
        self.fParametersToUpdate = [] # (id, value)

        self.fPlayingNotes = [] # (channel, note)

        self.fTabIconOff    = QIcon(":/scalable/led_off.svg")
        self.fTabIconOn     = QIcon(":/scalable/led_yellow.svg")
        self.fTabIconTimers = []

        # used during testing
        self.fIdleTimerId = 0

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

        labelPluginFont = self.ui.label_plugin.font()
        labelPluginFont.setPixelSize(15)
        labelPluginFont.setWeight(75)
        self.ui.label_plugin.setFont(labelPluginFont)

        self.ui.dial_drywet.setCustomPaintMode(self.ui.dial_drywet.CUSTOM_PAINT_MODE_CARLA_WET)
        self.ui.dial_drywet.setSvg(3)
        self.ui.dial_drywet.setLabel("Dry/Wet")
        self.ui.dial_drywet.setMinimum(0.0)
        self.ui.dial_drywet.setMaximum(1.0)
        self.ui.dial_drywet.setValue(host.get_internal_parameter_value(pluginId, PARAMETER_DRYWET))

        self.ui.dial_vol.setCustomPaintMode(self.ui.dial_vol.CUSTOM_PAINT_MODE_CARLA_VOL)
        self.ui.dial_vol.setSvg(3)
        self.ui.dial_vol.setLabel("Volume")
        self.ui.dial_vol.setMinimum(0.0)
        self.ui.dial_vol.setMaximum(1.27)
        self.ui.dial_vol.setValue(host.get_internal_parameter_value(pluginId, PARAMETER_VOLUME))

        self.ui.dial_b_left.setCustomPaintMode(self.ui.dial_b_left.CUSTOM_PAINT_MODE_CARLA_L)
        self.ui.dial_b_left.setSvg(4)
        self.ui.dial_b_left.setLabel("L")
        self.ui.dial_b_left.setMinimum(-1.0)
        self.ui.dial_b_left.setMaximum(1.0)
        self.ui.dial_b_left.setValue(host.get_internal_parameter_value(pluginId, PARAMETER_BALANCE_LEFT))

        self.ui.dial_b_right.setCustomPaintMode(self.ui.dial_b_right.CUSTOM_PAINT_MODE_CARLA_R)
        self.ui.dial_b_right.setSvg(4)
        self.ui.dial_b_right.setLabel("R")
        self.ui.dial_b_right.setMinimum(-1.0)
        self.ui.dial_b_right.setMaximum(1.0)
        self.ui.dial_b_right.setValue(host.get_internal_parameter_value(pluginId, PARAMETER_BALANCE_RIGHT))

        self.ui.dial_pan.setCustomPaintMode(self.ui.dial_b_right.CUSTOM_PAINT_MODE_CARLA_PAN)
        self.ui.dial_pan.setSvg(4)
        self.ui.dial_pan.setLabel("Pan")
        self.ui.dial_pan.setMinimum(-1.0)
        self.ui.dial_pan.setMaximum(1.0)
        self.ui.dial_pan.setValue(host.get_internal_parameter_value(pluginId, PARAMETER_PANNING))

        self.ui.sb_ctrl_channel.setValue(self.fControlChannel+1)

        self.ui.scrollArea = PixmapKeyboardHArea(self)
        self.ui.keyboard   = self.ui.scrollArea.keyboard
        self.ui.keyboard.setEnabled(self.fControlChannel >= 0)
        self.layout().addWidget(self.ui.scrollArea)

        self.ui.scrollArea.setEnabled(False)
        self.ui.scrollArea.setVisible(False)

        # todo
        self.ui.rb_balance.setEnabled(False)
        self.ui.rb_balance.setVisible(False)
        self.ui.rb_pan.setEnabled(False)
        self.ui.rb_pan.setVisible(False)

        self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint)

        self.reloadAll()

        self.fFirstInit = False

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

        self.finished.connect(self.slot_finished)

        self.ui.ch_fixed_buffer.clicked.connect(self.slot_optionChanged)
        self.ui.ch_force_stereo.clicked.connect(self.slot_optionChanged)
        self.ui.ch_map_program_changes.clicked.connect(self.slot_optionChanged)
        self.ui.ch_use_chunks.clicked.connect(self.slot_optionChanged)
        self.ui.ch_send_program_changes.clicked.connect(self.slot_optionChanged)
        self.ui.ch_send_control_changes.clicked.connect(self.slot_optionChanged)
        self.ui.ch_send_channel_pressure.clicked.connect(self.slot_optionChanged)
        self.ui.ch_send_note_aftertouch.clicked.connect(self.slot_optionChanged)
        self.ui.ch_send_pitchbend.clicked.connect(self.slot_optionChanged)
        self.ui.ch_send_all_sound_off.clicked.connect(self.slot_optionChanged)

        self.ui.dial_drywet.realValueChanged.connect(self.slot_dryWetChanged)
        self.ui.dial_vol.realValueChanged.connect(self.slot_volumeChanged)
        self.ui.dial_b_left.realValueChanged.connect(self.slot_balanceLeftChanged)
        self.ui.dial_b_right.realValueChanged.connect(self.slot_balanceRightChanged)
        self.ui.dial_pan.realValueChanged.connect(self.slot_panChanged)
        self.ui.sb_ctrl_channel.valueChanged.connect(self.slot_ctrlChannelChanged)

        self.ui.dial_drywet.customContextMenuRequested.connect(self.slot_knobCustomMenu)
        self.ui.dial_vol.customContextMenuRequested.connect(self.slot_knobCustomMenu)
        self.ui.dial_b_left.customContextMenuRequested.connect(self.slot_knobCustomMenu)
        self.ui.dial_b_right.customContextMenuRequested.connect(self.slot_knobCustomMenu)
        self.ui.dial_pan.customContextMenuRequested.connect(self.slot_knobCustomMenu)
        self.ui.sb_ctrl_channel.customContextMenuRequested.connect(self.slot_channelCustomMenu)

        self.ui.keyboard.noteOn.connect(self.slot_noteOn)
        self.ui.keyboard.noteOff.connect(self.slot_noteOff)

        self.ui.cb_programs.currentIndexChanged.connect(self.slot_programIndexChanged)
        self.ui.cb_midi_programs.currentIndexChanged.connect(self.slot_midiProgramIndexChanged)

        self.ui.b_save_state.clicked.connect(self.slot_stateSave)
        self.ui.b_load_state.clicked.connect(self.slot_stateLoad)

        host.NoteOnCallback.connect(self.slot_handleNoteOnCallback)
        host.NoteOffCallback.connect(self.slot_handleNoteOffCallback)
        host.UpdateCallback.connect(self.slot_handleUpdateCallback)
        host.ReloadInfoCallback.connect(self.slot_handleReloadInfoCallback)
        host.ReloadParametersCallback.connect(self.slot_handleReloadParametersCallback)
        host.ReloadProgramsCallback.connect(self.slot_handleReloadProgramsCallback)
        host.ReloadAllCallback.connect(self.slot_handleReloadAllCallback)

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

    @pyqtSlot(int, int, int, int)
    def slot_handleNoteOnCallback(self, pluginId, channel, note, velocity):
        if self.fPluginId != pluginId: return

        if self.fControlChannel == channel:
            self.ui.keyboard.sendNoteOn(note, False)

        playItem = (channel, note)

        if playItem not in self.fPlayingNotes:
            self.fPlayingNotes.append(playItem)

        if len(self.fPlayingNotes) == 1 and self.fParent is not None:
            self.fParent.editDialogMidiActivityChanged(self.fPluginId, True)

    @pyqtSlot(int, int, int)
    def slot_handleNoteOffCallback(self, pluginId, channel, note):
        if self.fPluginId != pluginId: return

        if self.fControlChannel == channel:
            self.ui.keyboard.sendNoteOff(note, False)

        playItem = (channel, note)

        if playItem in self.fPlayingNotes:
            self.fPlayingNotes.remove(playItem)

        if len(self.fPlayingNotes) == 0 and self.fParent is not None:
            self.fParent.editDialogMidiActivityChanged(self.fPluginId, False)

    @pyqtSlot(int)
    def slot_handleUpdateCallback(self, pluginId):
        if self.fPluginId == pluginId:
            self.updateInfo()

    @pyqtSlot(int)
    def slot_handleReloadInfoCallback(self, pluginId):
        if self.fPluginId == pluginId:
            self.reloadInfo()

    @pyqtSlot(int)
    def slot_handleReloadParametersCallback(self, pluginId):
        if self.fPluginId == pluginId:
            self.reloadParameters()

    @pyqtSlot(int)
    def slot_handleReloadProgramsCallback(self, pluginId):
        if self.fPluginId == pluginId:
            self.reloadPrograms()

    @pyqtSlot(int)
    def slot_handleReloadAllCallback(self, pluginId):
        if self.fPluginId == pluginId:
            self.reloadAll()

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

    def updateInfo(self):
        # Update current program text
        if self.ui.cb_programs.count() > 0:
            pIndex = self.ui.cb_programs.currentIndex()
            if pIndex >= 0:
                pName  = self.host.get_program_name(self.fPluginId, pIndex)
                #pName  = pName[:40] + (pName[40:] and "...")
                self.ui.cb_programs.setItemText(pIndex, pName)

        # Update current midi program text
        if self.ui.cb_midi_programs.count() > 0:
            mpIndex = self.ui.cb_midi_programs.currentIndex()
            if mpIndex >= 0:
                mpData  = self.host.get_midi_program_data(self.fPluginId, mpIndex)
                mpBank  = mpData['bank']
                mpProg  = mpData['program']
                mpName  = mpData['name']
                #mpName  = mpName[:40] + (mpName[40:] and "...")
                self.ui.cb_midi_programs.setItemText(mpIndex, "%03i:%03i - %s" % (mpBank+1, mpProg+1, mpName))

        # Update all parameter values
        for paramType, paramId, paramWidget in self.fParameterList:
            paramWidget.blockSignals(True)
            paramWidget.setValue(self.host.get_current_parameter_value(self.fPluginId, paramId))
            paramWidget.blockSignals(False)

        # and the internal ones too
        self.ui.dial_drywet.blockSignals(True)
        self.ui.dial_drywet.setValue(self.host.get_internal_parameter_value(self.fPluginId, PARAMETER_DRYWET))
        self.ui.dial_drywet.blockSignals(False)

        self.ui.dial_vol.blockSignals(True)
        self.ui.dial_vol.setValue(self.host.get_internal_parameter_value(self.fPluginId, PARAMETER_VOLUME))
        self.ui.dial_vol.blockSignals(False)

        self.ui.dial_b_left.blockSignals(True)
        self.ui.dial_b_left.setValue(self.host.get_internal_parameter_value(self.fPluginId, PARAMETER_BALANCE_LEFT))
        self.ui.dial_b_left.blockSignals(False)

        self.ui.dial_b_right.blockSignals(True)
        self.ui.dial_b_right.setValue(self.host.get_internal_parameter_value(self.fPluginId, PARAMETER_BALANCE_RIGHT))
        self.ui.dial_b_right.blockSignals(False)

        self.ui.dial_pan.blockSignals(True)
        self.ui.dial_pan.setValue(self.host.get_internal_parameter_value(self.fPluginId, PARAMETER_PANNING))
        self.ui.dial_pan.blockSignals(False)

        self.fControlChannel = round(self.host.get_internal_parameter_value(self.fPluginId, PARAMETER_CTRL_CHANNEL))
        self.ui.sb_ctrl_channel.blockSignals(True)
        self.ui.sb_ctrl_channel.setValue(self.fControlChannel+1)
        self.ui.sb_ctrl_channel.blockSignals(False)
        self.ui.keyboard.allNotesOff()
        self._updateCtrlPrograms()

        self.fParametersToUpdate = []

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

    def reloadAll(self):
        self.fPluginInfo = self.host.get_plugin_info(self.fPluginId)

        self.reloadInfo()
        self.reloadParameters()
        self.reloadPrograms()

        if self.fPluginInfo['type'] == PLUGIN_LV2:
            self.ui.b_save_state.setEnabled(False)

        if not self.ui.scrollArea.isEnabled():
            self.resize(self.width(), self.height()-self.ui.scrollArea.height())

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

    def reloadInfo(self):
        realPluginName = self.host.get_real_plugin_name(self.fPluginId)
        #audioCountInfo = self.host.get_audio_port_count_info(self.fPluginId)
        midiCountInfo  = self.host.get_midi_port_count_info(self.fPluginId)
        #paramCountInfo = self.host.get_parameter_count_info(self.fPluginId)

        pluginHints = self.fPluginInfo['hints']

        self.ui.le_type.setText(getPluginTypeAsString(self.fPluginInfo['type']))

        self.ui.label_name.setEnabled(bool(realPluginName))
        self.ui.le_name.setEnabled(bool(realPluginName))
        self.ui.le_name.setText(realPluginName)
        self.ui.le_name.setToolTip(realPluginName)

        self.ui.label_label.setEnabled(bool(self.fPluginInfo['label']))
        self.ui.le_label.setEnabled(bool(self.fPluginInfo['label']))
        self.ui.le_label.setText(self.fPluginInfo['label'])
        self.ui.le_label.setToolTip(self.fPluginInfo['label'])

        self.ui.label_maker.setEnabled(bool(self.fPluginInfo['maker']))
        self.ui.le_maker.setEnabled(bool(self.fPluginInfo['maker']))
        self.ui.le_maker.setText(self.fPluginInfo['maker'])
        self.ui.le_maker.setToolTip(self.fPluginInfo['maker'])

        self.ui.label_copyright.setEnabled(bool(self.fPluginInfo['copyright']))
        self.ui.le_copyright.setEnabled(bool(self.fPluginInfo['copyright']))
        self.ui.le_copyright.setText(self.fPluginInfo['copyright'])
        self.ui.le_copyright.setToolTip(self.fPluginInfo['copyright'])

        self.ui.label_unique_id.setEnabled(bool(self.fPluginInfo['uniqueId']))
        self.ui.le_unique_id.setEnabled(bool(self.fPluginInfo['uniqueId']))
        self.ui.le_unique_id.setText(str(self.fPluginInfo['uniqueId']))
        self.ui.le_unique_id.setToolTip(str(self.fPluginInfo['uniqueId']))

        self.ui.label_plugin.setText("\n%s\n" % (self.fPluginInfo['name'] or "(none)"))
        self.setWindowTitle(self.fPluginInfo['name'] or "(none)")

        self.ui.dial_drywet.setEnabled(pluginHints & PLUGIN_CAN_DRYWET)
        self.ui.dial_vol.setEnabled(pluginHints & PLUGIN_CAN_VOLUME)
        self.ui.dial_b_left.setEnabled(pluginHints & PLUGIN_CAN_BALANCE)
        self.ui.dial_b_right.setEnabled(pluginHints & PLUGIN_CAN_BALANCE)
        self.ui.dial_pan.setEnabled(pluginHints & PLUGIN_CAN_PANNING)

        self.ui.ch_use_chunks.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_USE_CHUNKS)
        self.ui.ch_use_chunks.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_USE_CHUNKS)
        self.ui.ch_fixed_buffer.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_FIXED_BUFFERS)
        self.ui.ch_fixed_buffer.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_FIXED_BUFFERS)
        self.ui.ch_force_stereo.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_FORCE_STEREO)
        self.ui.ch_force_stereo.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_FORCE_STEREO)
        self.ui.ch_map_program_changes.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_MAP_PROGRAM_CHANGES)
        self.ui.ch_map_program_changes.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_MAP_PROGRAM_CHANGES)
        self.ui.ch_send_control_changes.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_CONTROL_CHANGES)
        self.ui.ch_send_control_changes.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_SEND_CONTROL_CHANGES)
        self.ui.ch_send_channel_pressure.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_CHANNEL_PRESSURE)
        self.ui.ch_send_channel_pressure.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_SEND_CHANNEL_PRESSURE)
        self.ui.ch_send_note_aftertouch.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH)
        self.ui.ch_send_note_aftertouch.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH)
        self.ui.ch_send_pitchbend.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_PITCHBEND)
        self.ui.ch_send_pitchbend.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_SEND_PITCHBEND)
        self.ui.ch_send_all_sound_off.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_ALL_SOUND_OFF)
        self.ui.ch_send_all_sound_off.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_SEND_ALL_SOUND_OFF)

        canSendPrograms = bool((self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_PROGRAM_CHANGES) != 0 and
                               (self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_MAP_PROGRAM_CHANGES) == 0)
        self.ui.ch_send_program_changes.setEnabled(canSendPrograms)
        self.ui.ch_send_program_changes.setChecked(self.fPluginInfo['optionsEnabled'] & PLUGIN_OPTION_SEND_PROGRAM_CHANGES)

        self.ui.sw_programs.setCurrentIndex(0 if self.fPluginInfo['type'] in (PLUGIN_VST2, PLUGIN_SFZ) else 1)

        # Show/hide keyboard
        showKeyboard = (self.fPluginInfo['category'] == PLUGIN_CATEGORY_SYNTH or midiCountInfo['ins'] > 0)
        self.ui.scrollArea.setEnabled(showKeyboard)
        self.ui.scrollArea.setVisible(showKeyboard)

        # Force-update parent for new hints
        if self.fParent is not None and not self.fFirstInit:
            self.fParent.editDialogPluginHintsChanged(self.fPluginId, pluginHints)

    def reloadParameters(self):
        # Reset
        self.fParameterList      = []
        self.fParametersToUpdate = []
        self.fTabIconTimers      = []

        # Remove all previous parameters
        for x in range(self.ui.tabWidget.count()-1):
            self.ui.tabWidget.widget(1).deleteLater()
            self.ui.tabWidget.removeTab(1)

        parameterCount = self.host.get_parameter_count(self.fPluginId)

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

        if parameterCount <= 0:
            return

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

        paramInputList   = []
        paramOutputList  = []
        paramInputWidth  = 0
        paramOutputWidth = 0

        paramInputListFull  = [] # ([params], width)
        paramOutputListFull = [] # ([params], width)

        for i in range(min(parameterCount, self.host.maxParameters)):
            paramInfo   = self.host.get_parameter_info(self.fPluginId, i)
            paramData   = self.host.get_parameter_data(self.fPluginId, i)
            paramRanges = self.host.get_parameter_ranges(self.fPluginId, i)
            paramValue  = self.host.get_current_parameter_value(self.fPluginId, i)

            if paramData['type'] not in (PARAMETER_INPUT, PARAMETER_OUTPUT):
                continue
            if (paramData['hints'] & PARAMETER_IS_ENABLED) == 0:
                continue

            parameter = {
                'type':  paramData['type'],
                'hints': paramData['hints'],
                'name':  paramInfo['name'],
                'unit':  paramInfo['unit'],
                'scalePoints': [],

                'index':   paramData['index'],
                'default': paramRanges['def'],
                'minimum': paramRanges['min'],
                'maximum': paramRanges['max'],
                'step':    paramRanges['step'],
                'stepSmall': paramRanges['stepSmall'],
                'stepLarge': paramRanges['stepLarge'],
                'mappedControlIndex': paramData['mappedControlIndex'],
                'mappedMinimum': paramData['mappedMinimum'],
                'mappedMaximum': paramData['mappedMaximum'],
                'midiChannel': paramData['midiChannel']+1,

                'comment':   paramInfo['comment'],
                'groupName': paramInfo['groupName'],

                'current': paramValue
            }

            for j in range(paramInfo['scalePointCount']):
                scalePointInfo = self.host.get_parameter_scalepoint_info(self.fPluginId, i, j)

                parameter['scalePoints'].append({
                    'value': scalePointInfo['value'],
                    'label': scalePointInfo['label']
                })

            #parameter['name'] = parameter['name'][:30] + (parameter['name'][30:] and "...")

            # -----------------------------------------------------------------
            # Get width values, in packs of 20

            if parameter['type'] == PARAMETER_INPUT:
                paramInputWidthTMP = fontMetricsHorizontalAdvance(self.fontMetrics(), parameter['name'])

                if paramInputWidthTMP > paramInputWidth:
                    paramInputWidth = paramInputWidthTMP

                paramInputList.append(parameter)

            else:
                paramOutputWidthTMP = fontMetricsHorizontalAdvance(self.fontMetrics(), parameter['name'])

                if paramOutputWidthTMP > paramOutputWidth:
                    paramOutputWidth = paramOutputWidthTMP

                paramOutputList.append(parameter)

        paramInputListFull.append((paramInputList, paramInputWidth))
        paramOutputListFull.append((paramOutputList, paramOutputWidth))

        # Create parameter tabs + widgets
        self._createParameterWidgets(PARAMETER_INPUT,  paramInputListFull,  self.tr("Parameters"))
        self._createParameterWidgets(PARAMETER_OUTPUT, paramOutputListFull, self.tr("Outputs"))

    def reloadPrograms(self):
        # Programs
        self.ui.cb_programs.blockSignals(True)
        self.ui.cb_programs.clear()

        programCount = self.host.get_program_count(self.fPluginId)

        if programCount > 0:
            self.ui.cb_programs.setEnabled(True)
            self.ui.label_programs.setEnabled(True)

            for i in range(programCount):
                pName = self.host.get_program_name(self.fPluginId, i)
                #pName = pName[:40] + (pName[40:] and "...")
                self.ui.cb_programs.addItem(pName)

            self.ui.cb_programs.setCurrentIndex(self.host.get_current_program_index(self.fPluginId))

        else:
            self.ui.cb_programs.setEnabled(False)
            self.ui.label_programs.setEnabled(False)

        self.ui.cb_programs.blockSignals(False)

        # MIDI Programs
        self.ui.cb_midi_programs.blockSignals(True)
        self.ui.cb_midi_programs.clear()

        midiProgramCount = self.host.get_midi_program_count(self.fPluginId)

        if midiProgramCount > 0:
            self.ui.cb_midi_programs.setEnabled(True)
            self.ui.label_midi_programs.setEnabled(True)

            for i in range(midiProgramCount):
                mpData = self.host.get_midi_program_data(self.fPluginId, i)
                mpBank = mpData['bank']
                mpProg = mpData['program']
                mpName = mpData['name']
                #mpName = mpName[:40] + (mpName[40:] and "...")

                self.ui.cb_midi_programs.addItem("%03i:%03i - %s" % (mpBank+1, mpProg+1, mpName))

            self.ui.cb_midi_programs.setCurrentIndex(self.host.get_current_midi_program_index(self.fPluginId))

        else:
            self.ui.cb_midi_programs.setEnabled(False)
            self.ui.label_midi_programs.setEnabled(False)

        self.ui.cb_midi_programs.blockSignals(False)

        self.ui.sw_programs.setEnabled(programCount > 0 or midiProgramCount > 0)

        if self.fPluginInfo['type'] == PLUGIN_LV2:
            self.ui.b_load_state.setEnabled(programCount > 0)

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

    def clearNotes(self):
         self.fPlayingNotes = []
         self.ui.keyboard.allNotesOff()

    def noteOn(self, channel, note, velocity):
        if self.fControlChannel == channel:
            self.ui.keyboard.sendNoteOn(note, False)

    def noteOff(self, channel, note):
        if self.fControlChannel == channel:
            self.ui.keyboard.sendNoteOff(note, False)

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

    def getHints(self):
        return self.fPluginInfo['hints']

    def setPluginId(self, idx):
        self.fPluginId = idx

    def setName(self, name):
        self.fPluginInfo['name'] = name
        self.ui.label_plugin.setText("\n%s\n" % name)
        self.setWindowTitle(name)

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

    def setParameterValue(self, parameterId, value):
        for paramItem in self.fParametersToUpdate:
            if paramItem[0] == parameterId:
                paramItem[1] = value
                break
        else:
            self.fParametersToUpdate.append([parameterId, value])

    def setParameterDefault(self, parameterId, value):
        for paramType, paramId, paramWidget in self.fParameterList:
            if paramId == parameterId:
                paramWidget.setDefault(value)
                break

    def setParameterMappedControlIndex(self, parameterId, control):
        for paramType, paramId, paramWidget in self.fParameterList:
            if paramId == parameterId:
                paramWidget.setMappedControlIndex(control)
                break

    def setParameterMappedRange(self, parameterId, minimum, maximum):
        for paramType, paramId, paramWidget in self.fParameterList:
            if paramId == parameterId:
                paramWidget.setMappedRange(minimum, maximum)
                break

    def setParameterMidiChannel(self, parameterId, channel):
        for paramType, paramId, paramWidget in self.fParameterList:
            if paramId == parameterId:
                paramWidget.setMidiChannel(channel+1)
                break

    def setProgram(self, index):
        self.ui.cb_programs.blockSignals(True)
        self.ui.cb_programs.setCurrentIndex(index)
        self.ui.cb_programs.blockSignals(False)
        self._updateParameterValues()

    def setMidiProgram(self, index):
        self.ui.cb_midi_programs.blockSignals(True)
        self.ui.cb_midi_programs.setCurrentIndex(index)
        self.ui.cb_midi_programs.blockSignals(False)
        self._updateParameterValues()

    def setOption(self, option, yesNo):
        if option == PLUGIN_OPTION_USE_CHUNKS:
            widget = self.ui.ch_use_chunks
        elif option == PLUGIN_OPTION_FIXED_BUFFERS:
            widget = self.ui.ch_fixed_buffer
        elif option == PLUGIN_OPTION_FORCE_STEREO:
            widget = self.ui.ch_force_stereo
        elif option == PLUGIN_OPTION_MAP_PROGRAM_CHANGES:
            widget = self.ui.ch_map_program_changes
        elif option == PLUGIN_OPTION_SEND_PROGRAM_CHANGES:
            widget = self.ui.ch_send_program_changes
        elif option == PLUGIN_OPTION_SEND_CONTROL_CHANGES:
            widget = self.ui.ch_send_control_changes
        elif option == PLUGIN_OPTION_SEND_CHANNEL_PRESSURE:
            widget = self.ui.ch_send_channel_pressure
        elif option == PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH:
            widget = self.ui.ch_send_note_aftertouch
        elif option == PLUGIN_OPTION_SEND_PITCHBEND:
            widget = self.ui.ch_send_pitchbend
        elif option == PLUGIN_OPTION_SEND_ALL_SOUND_OFF:
            widget = self.ui.ch_send_all_sound_off
        else:
            return

        widget.blockSignals(True)
        widget.setChecked(yesNo)
        widget.blockSignals(False)

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

    def setVisible(self, yesNo):
        if yesNo:
            if not self.fGeometry.isNull():
                self.restoreGeometry(self.fGeometry)
        else:
            self.fGeometry = self.saveGeometry()

        QDialog.setVisible(self, yesNo)

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

    def idleSlow(self):
        # Check Tab icons
        for i in range(len(self.fTabIconTimers)):
            if self.fTabIconTimers[i] == ICON_STATE_ON:
                self.fTabIconTimers[i] = ICON_STATE_WAIT
            elif self.fTabIconTimers[i] == ICON_STATE_WAIT:
                self.fTabIconTimers[i] = ICON_STATE_OFF
            elif self.fTabIconTimers[i] == ICON_STATE_OFF:
                self.fTabIconTimers[i] = ICON_STATE_NULL
                self.ui.tabWidget.setTabIcon(i+1, self.fTabIconOff)

        # Check parameters needing update
        for index, value in self.fParametersToUpdate:
            if index == PARAMETER_DRYWET:
                self.ui.dial_drywet.blockSignals(True)
                self.ui.dial_drywet.setValue(value)
                self.ui.dial_drywet.blockSignals(False)

            elif index == PARAMETER_VOLUME:
                self.ui.dial_vol.blockSignals(True)
                self.ui.dial_vol.setValue(value)
                self.ui.dial_vol.blockSignals(False)

            elif index == PARAMETER_BALANCE_LEFT:
                self.ui.dial_b_left.blockSignals(True)
                self.ui.dial_b_left.setValue(value)
                self.ui.dial_b_left.blockSignals(False)

            elif index == PARAMETER_BALANCE_RIGHT:
                self.ui.dial_b_right.blockSignals(True)
                self.ui.dial_b_right.setValue(value)
                self.ui.dial_b_right.blockSignals(False)

            elif index == PARAMETER_PANNING:
                self.ui.dial_pan.blockSignals(True)
                self.ui.dial_pan.setValue(value)
                self.ui.dial_pan.blockSignals(False)

            elif index == PARAMETER_CTRL_CHANNEL:
                self.fControlChannel = round(value)
                self.ui.sb_ctrl_channel.blockSignals(True)
                self.ui.sb_ctrl_channel.setValue(self.fControlChannel+1)
                self.ui.sb_ctrl_channel.blockSignals(False)
                self.ui.keyboard.allNotesOff()
                self._updateCtrlPrograms()

            elif index >= 0:
                for paramType, paramId, paramWidget in self.fParameterList:
                    if paramId != index:
                        continue
                    # FIXME see below
                    if paramType != PARAMETER_INPUT:
                        continue

                    paramWidget.blockSignals(True)
                    paramWidget.setValue(value)
                    paramWidget.blockSignals(False)

                    #if paramType == PARAMETER_INPUT:
                    tabIndex = paramWidget.getTabIndex()

                    if self.fTabIconTimers[tabIndex-1] == ICON_STATE_NULL:
                        self.ui.tabWidget.setTabIcon(tabIndex, self.fTabIconOn)

                    self.fTabIconTimers[tabIndex-1] = ICON_STATE_ON
                    break

        # Clear all parameters
        self.fParametersToUpdate = []

        # Update parameter outputs | FIXME needed?
        for paramType, paramId, paramWidget in self.fParameterList:
            if paramType != PARAMETER_OUTPUT:
                continue

            paramWidget.blockSignals(True)
            paramWidget.setValue(self.host.get_current_parameter_value(self.fPluginId, paramId))
            paramWidget.blockSignals(False)

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

    @pyqtSlot()
    def slot_stateSave(self):
        if self.fPluginInfo['type'] == PLUGIN_LV2:
            # TODO
            return

        if self.fCurrentStateFilename:
            askTry = QMessageBox.question(self, self.tr("Overwrite?"), self.tr("Overwrite previously created file?"), QMessageBox.Ok|QMessageBox.Cancel)

            if askTry == QMessageBox.Ok:
                self.host.save_plugin_state(self.fPluginId, self.fCurrentStateFilename)
                return

            self.fCurrentStateFilename = None

        fileFilter = self.tr("Carla State File (*.carxs)")
        filename, ok = QFileDialog.getSaveFileName(self, self.tr("Save Plugin State File"), filter=fileFilter)

        # FIXME use ok value, test if it works as expected
        if not filename:
            return

        if not filename.lower().endswith(".carxs"):
            filename += ".carxs"

        self.fCurrentStateFilename = filename
        self.host.save_plugin_state(self.fPluginId, self.fCurrentStateFilename)

    @pyqtSlot()
    def slot_stateLoad(self):
        if self.fPluginInfo['type'] == PLUGIN_LV2:
            presetList = []

            for i in range(self.host.get_program_count(self.fPluginId)):
                presetList.append("%03i - %s" % (i+1, self.host.get_program_name(self.fPluginId, i)))

            ret = QInputDialog.getItem(self, self.tr("Open LV2 Preset"), self.tr("Select an LV2 Preset:"), presetList, 0, False)

            if ret[1]:
                index = int(ret[0].split(" - ", 1)[0])-1
                self.host.set_program(self.fPluginId, index)
                self.setMidiProgram(-1)

            return

        fileFilter = self.tr("Carla State File (*.carxs)")
        filename, ok = QFileDialog.getOpenFileName(self, self.tr("Open Plugin State File"), filter=fileFilter)

        # FIXME use ok value, test if it works as expected
        if not filename:
            return

        self.fCurrentStateFilename = filename
        self.host.load_plugin_state(self.fPluginId, self.fCurrentStateFilename)

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

    @pyqtSlot(bool)
    def slot_optionChanged(self, clicked):
        sender = self.sender()

        if sender == self.ui.ch_use_chunks:
            option = PLUGIN_OPTION_USE_CHUNKS
        elif sender == self.ui.ch_fixed_buffer:
            option = PLUGIN_OPTION_FIXED_BUFFERS
        elif sender == self.ui.ch_force_stereo:
            option = PLUGIN_OPTION_FORCE_STEREO
        elif sender == self.ui.ch_map_program_changes:
            option = PLUGIN_OPTION_MAP_PROGRAM_CHANGES
        elif sender == self.ui.ch_send_program_changes:
            option = PLUGIN_OPTION_SEND_PROGRAM_CHANGES
        elif sender == self.ui.ch_send_control_changes:
            option = PLUGIN_OPTION_SEND_CONTROL_CHANGES
        elif sender == self.ui.ch_send_channel_pressure:
            option = PLUGIN_OPTION_SEND_CHANNEL_PRESSURE
        elif sender == self.ui.ch_send_note_aftertouch:
            option = PLUGIN_OPTION_SEND_NOTE_AFTERTOUCH
        elif sender == self.ui.ch_send_pitchbend:
            option = PLUGIN_OPTION_SEND_PITCHBEND
        elif sender == self.ui.ch_send_all_sound_off:
            option = PLUGIN_OPTION_SEND_ALL_SOUND_OFF
        else:
            return

        #--------------------------------------------------------------
        # handle map-program-changes and send-program-changes conflict

        if option == PLUGIN_OPTION_MAP_PROGRAM_CHANGES and clicked:
            self.ui.ch_send_program_changes.setEnabled(False)

            # disable send-program-changes if needed
            if self.ui.ch_send_program_changes.isChecked():
                self.host.set_option(self.fPluginId, PLUGIN_OPTION_SEND_PROGRAM_CHANGES, False)

        #--------------------------------------------------------------
        # set option

        self.host.set_option(self.fPluginId, option, clicked)

        #--------------------------------------------------------------
        # handle map-program-changes and send-program-changes conflict

        if option == PLUGIN_OPTION_MAP_PROGRAM_CHANGES and not clicked:
            self.ui.ch_send_program_changes.setEnabled(self.fPluginInfo['optionsAvailable'] & PLUGIN_OPTION_SEND_PROGRAM_CHANGES)

            # restore send-program-changes if needed
            if self.ui.ch_send_program_changes.isChecked():
                self.host.set_option(self.fPluginId, PLUGIN_OPTION_SEND_PROGRAM_CHANGES, True)

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

    @pyqtSlot(float)
    def slot_dryWetChanged(self, value):
        self.host.set_drywet(self.fPluginId, value)

        if self.fParent is not None:
            self.fParent.editDialogParameterValueChanged(self.fPluginId, PARAMETER_DRYWET, value)

    @pyqtSlot(float)
    def slot_volumeChanged(self, value):
        self.host.set_volume(self.fPluginId, value)

        if self.fParent is not None:
            self.fParent.editDialogParameterValueChanged(self.fPluginId, PARAMETER_VOLUME, value)

    @pyqtSlot(float)
    def slot_balanceLeftChanged(self, value):
        self.host.set_balance_left(self.fPluginId, value)

        if self.fParent is not None:
            self.fParent.editDialogParameterValueChanged(self.fPluginId, PARAMETER_BALANCE_LEFT, value)

    @pyqtSlot(float)
    def slot_balanceRightChanged(self, value):
        self.host.set_balance_right(self.fPluginId, value)

        if self.fParent is not None:
            self.fParent.editDialogParameterValueChanged(self.fPluginId, PARAMETER_BALANCE_RIGHT, value)

    @pyqtSlot(float)
    def slot_panChanged(self, value):
        self.host.set_panning(self.fPluginId, value)

        if self.fParent is not None:
            self.fParent.editDialogParameterValueChanged(self.fPluginId, PARAMETER_PANNING, value)

    @pyqtSlot(int)
    def slot_ctrlChannelChanged(self, value):
        self.fControlChannel = value-1
        self.host.set_ctrl_channel(self.fPluginId, self.fControlChannel)

        self.ui.keyboard.allNotesOff()
        self._updateCtrlPrograms()

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

    @pyqtSlot(int, float)
    def slot_parameterValueChanged(self, parameterId, value):
        self.host.set_parameter_value(self.fPluginId, parameterId, value)

        if self.fParent is not None:
            self.fParent.editDialogParameterValueChanged(self.fPluginId, parameterId, value)

    @pyqtSlot(int, int)
    def slot_parameterMappedControlChanged(self, parameterId, control):
        self.host.set_parameter_mapped_control_index(self.fPluginId, parameterId, control)

    @pyqtSlot(int, float, float)
    def slot_parameterMappedRangeChanged(self, parameterId, minimum, maximum):
        self.host.set_parameter_mapped_range(self.fPluginId, parameterId, minimum, maximum)

    @pyqtSlot(int, int)
    def slot_parameterMidiChannelChanged(self, parameterId, channel):
        self.host.set_parameter_midi_channel(self.fPluginId, parameterId, channel-1)

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

    @pyqtSlot(int)
    def slot_programIndexChanged(self, index):
        self.host.set_program(self.fPluginId, index)

        if self.fParent is not None:
            self.fParent.editDialogProgramChanged(self.fPluginId, index)

        self._updateParameterValues()

    @pyqtSlot(int)
    def slot_midiProgramIndexChanged(self, index):
        self.host.set_midi_program(self.fPluginId, index)

        if self.fParent is not None:
            self.fParent.editDialogMidiProgramChanged(self.fPluginId, index)

        self._updateParameterValues()

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

    @pyqtSlot(int)
    def slot_noteOn(self, note):
        if self.fControlChannel >= 0:
            self.host.send_midi_note(self.fPluginId, self.fControlChannel, note, 100)

        if self.fParent is not None:
            self.fParent.editDialogNotePressed(self.fPluginId, note)

    @pyqtSlot(int)
    def slot_noteOff(self, note):
        if self.fControlChannel >= 0:
            self.host.send_midi_note(self.fPluginId, self.fControlChannel, note, 0)

        if self.fParent is not None:
            self.fParent.editDialogNoteReleased(self.fPluginId, note)

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

    @pyqtSlot()
    def slot_finished(self):
        if self.fParent is not None:
            self.fParent.editDialogVisibilityChanged(self.fPluginId, False)

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

    @pyqtSlot()
    def slot_knobCustomMenu(self):
        sender   = self.sender()
        knobName = sender.objectName()

        if knobName == "dial_drywet":
            minimum = 0.0
            maximum = 1.0
            default = 1.0
            label   = "Dry/Wet"
        elif knobName == "dial_vol":
            minimum = 0.0
            maximum = 1.27
            default = 1.0
            label   = "Volume"
        elif knobName == "dial_b_left":
            minimum = -1.0
            maximum = 1.0
            default = -1.0
            label   = "Balance-Left"
        elif knobName == "dial_b_right":
            minimum = -1.0
            maximum = 1.0
            default = 1.0
            label   = "Balance-Right"
        elif knobName == "dial_pan":
            minimum = -1.0
            maximum = 1.0
            default = 0.0
            label   = "Panning"
        else:
            minimum = 0.0
            maximum = 1.0
            default = 0.5
            label   = "Unknown"

        menu = QMenu(self)
        actReset = menu.addAction(self.tr("Reset (%i%%)" % (default*100)))
        menu.addSeparator()
        actMinimum = menu.addAction(self.tr("Set to Minimum (%i%%)" % (minimum*100)))
        actCenter  = menu.addAction(self.tr("Set to Center"))
        actMaximum = menu.addAction(self.tr("Set to Maximum (%i%%)" % (maximum*100)))
        menu.addSeparator()
        actSet = menu.addAction(self.tr("Set value..."))

        if label not in ("Balance-Left", "Balance-Right", "Panning"):
            menu.removeAction(actCenter)

        actSelected = menu.exec_(QCursor.pos())

        if actSelected == actSet:
            current   = minimum + (maximum-minimum)*(float(sender.value())/10000)
            value, ok = QInputDialog.getInt(self, self.tr("Set value"), label, round(current*100.0), round(minimum*100.0), round(maximum*100.0), 1)
            if ok: value = float(value)/100.0

            if not ok:
                return

        elif actSelected == actMinimum:
            value = minimum
        elif actSelected == actMaximum:
            value = maximum
        elif actSelected == actReset:
            value = default
        elif actSelected == actCenter:
            value = 0.0
        else:
            return

        sender.setValue(value, True)

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

    @pyqtSlot()
    def slot_channelCustomMenu(self):
        menu = QMenu(self)

        actNone = menu.addAction(self.tr("None"))

        if self.fControlChannel+1 == 0:
            actNone.setCheckable(True)
            actNone.setChecked(True)

        for i in range(1, 16+1):
            action = menu.addAction("%i" % i)

            if self.fControlChannel+1 == i:
                action.setCheckable(True)
                action.setChecked(True)

        actSel = menu.exec_(QCursor.pos())

        if not actSel:
            pass
        elif actSel == actNone:
            self.ui.sb_ctrl_channel.setValue(0)
        elif actSel:
            selChannel = int(actSel.text())
            self.ui.sb_ctrl_channel.setValue(selChannel)

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

    def _createParameterWidgets(self, paramType, paramListFull, tabPageName):
        groupWidgets = {}

        for paramList, width in paramListFull:
            if len(paramList) == 0:
                break

            tabIndex = self.ui.tabWidget.count()

            scrollArea = QScrollArea(self.ui.tabWidget)
            scrollArea.setWidgetResizable(True)
            scrollArea.setFrameStyle(0)

            palette1 = scrollArea.palette()
            palette1.setColor(QPalette.Background, Qt.transparent)
            scrollArea.setPalette(palette1)

            palette2 = scrollArea.palette()
            palette2.setColor(QPalette.Background, palette2.color(QPalette.Button))

            scrollAreaWidget = QWidget(scrollArea)
            scrollAreaLayout = QVBoxLayout(scrollAreaWidget)
            scrollAreaLayout.setSpacing(3)

            for paramInfo in paramList:
                groupName = paramInfo['groupName']
                if groupName:
                    groupSymbol, groupName = groupName.split(":",1)
                    groupLayout, groupWidget = groupWidgets.get(groupSymbol, (None, None))
                    if groupLayout is None:
                        groupWidget = CollapsibleBox(groupName, scrollAreaWidget)
                        groupLayout = groupWidget.getContentLayout()
                        groupWidget.setPalette(palette2)
                        scrollAreaLayout.addWidget(groupWidget)
                        groupWidgets[groupSymbol] = (groupLayout, groupWidget)
                else:
                    groupLayout = scrollAreaLayout
                    groupWidget = scrollAreaWidget

                paramWidget = PluginParameter(groupWidget, self.host, paramInfo, self.fPluginId, tabIndex)
                paramWidget.setLabelWidth(width)
                groupLayout.addWidget(paramWidget)

                self.fParameterList.append((paramType, paramInfo['index'], paramWidget))

                if paramType == PARAMETER_INPUT:
                    paramWidget.valueChanged.connect(self.slot_parameterValueChanged)

                paramWidget.mappedControlChanged.connect(self.slot_parameterMappedControlChanged)
                paramWidget.mappedRangeChanged.connect(self.slot_parameterMappedRangeChanged)
                paramWidget.midiChannelChanged.connect(self.slot_parameterMidiChannelChanged)

            scrollAreaLayout.addStretch()

            scrollArea.setWidget(scrollAreaWidget)

            self.ui.tabWidget.addTab(scrollArea, tabPageName)

            if paramType == PARAMETER_INPUT:
                self.ui.tabWidget.setTabIcon(tabIndex, self.fTabIconOff)

            self.fTabIconTimers.append(ICON_STATE_NULL)

    def _updateCtrlPrograms(self):
        self.ui.keyboard.setEnabled(self.fControlChannel >= 0)

        if self.fPluginInfo['category'] != PLUGIN_CATEGORY_SYNTH or self.fPluginInfo['type'] not in (PLUGIN_INTERNAL, PLUGIN_SF2):
            return

        if self.fControlChannel < 0:
            self.ui.cb_programs.setEnabled(False)
            self.ui.cb_midi_programs.setEnabled(False)
            return

        self.ui.cb_programs.setEnabled(True)
        self.ui.cb_midi_programs.setEnabled(True)

        pIndex = self.host.get_current_program_index(self.fPluginId)

        if self.ui.cb_programs.currentIndex() != pIndex:
            self.setProgram(pIndex)

        mpIndex = self.host.get_current_midi_program_index(self.fPluginId)

        if self.ui.cb_midi_programs.currentIndex() != mpIndex:
            self.setMidiProgram(mpIndex)

    def _updateParameterValues(self):
        for paramType, paramId, paramWidget in self.fParameterList:
            paramWidget.blockSignals(True)
            paramWidget.setValue(self.host.get_current_parameter_value(self.fPluginId, paramId))
            paramWidget.blockSignals(False)

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

    def testTimer(self):
        self.fIdleTimerId = self.startTimer(50)

        self.SIGTERM.connect(self.testTimerClose)
        gCarla.gui = self
        setUpSignals()

    def testTimerClose(self):
        self.close()
        app.quit()

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

    def closeEvent(self, event):
        if self.fIdleTimerId != 0:
            self.killTimer(self.fIdleTimerId)
            self.fIdleTimerId = 0

            self.host.engine_close()

        QDialog.closeEvent(self, event)

    def timerEvent(self, event):
        if event.timerId() == self.fIdleTimerId:
            self.host.engine_idle()
            self.idleSlow()

        QDialog.timerEvent(self, event)

    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("Widgets", None, False, False, False)
    loadHostSettings(host)

    host.engine_init("JACK", "Carla-Widgets")
    host.add_plugin(BINARY_NATIVE, PLUGIN_DSSI, "/usr/lib/dssi/karplong.so", "karplong", "karplong", 0, None, 0x0)
    host.set_active(0, True)

    gui1 = CarlaAboutW(None, host)
    gui1.show()

    gui2 = PluginEdit(None, host, 0)
    gui2.testTimer()
    gui2.show()

    app.exit_exec()