"""
@package vdigit.preferences

@brief wxGUI vector digitizer preferences dialogs

Classes:
 - preferences::VDigitSettingsDialog

(C) 2007-2011 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Martin Landa <landa.martin gmail.com>
"""

import textwrap
import six

import wx
import wx.lib.colourselect as csel

from core import globalvar
from core.debug import Debug
from gui_core.gselect import ColumnSelect
from core.units import Units
from core.settings import UserSettings
from gui_core.wrap import SpinCtrl, Button, StaticText, \
    StaticBox


class VDigitSettingsDialog(wx.Dialog):

    def __init__(self, parent, giface, title=_("Digitization settings"),
                 style=wx.DEFAULT_DIALOG_STYLE):
        """Standard settings dialog for digitization purposes
        """
        wx.Dialog.__init__(
            self,
            parent=parent,
            id=wx.ID_ANY,
            title=title,
            style=style)

        self._giface = giface
        self.parent = parent                     # MapFrame
        self.digit = self.parent.MapWindow.digit

        # notebook
        notebook = wx.Notebook(parent=self, id=wx.ID_ANY, style=wx.BK_DEFAULT)
        self._createGeneralPage(notebook)
        self._createSymbologyPage(notebook)
        self.digit.SetCategory()
        self._createAttributesPage(notebook)
        self._createQueryPage(notebook)

        # buttons
        btnApply = Button(self, wx.ID_APPLY)
        btnCancel = Button(self, wx.ID_CLOSE)
        btnSave = Button(self, wx.ID_SAVE)
        btnSave.SetDefault()

        # bindigs
        btnApply.Bind(wx.EVT_BUTTON, self.OnApply)
        btnApply.SetToolTip(_("Apply changes for this session"))
        btnApply.SetDefault()
        btnSave.Bind(wx.EVT_BUTTON, self.OnSave)
        btnSave.SetToolTip(
            _("Close dialog and save changes to user settings file"))
        btnCancel.Bind(wx.EVT_BUTTON, self.OnCancel)
        btnCancel.SetToolTip(_("Close dialog and ignore changes"))

        # sizers
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(btnCancel, proportion=0,
                     flag=wx.ALIGN_RIGHT | wx.ALL, border=5)
        btnSizer.Add(btnApply, proportion=0,
                     flag=wx.ALIGN_RIGHT | wx.ALL, border=5)
        btnSizer.Add(btnSave, proportion=0,
                     flag=wx.ALIGN_RIGHT | wx.ALL, border=5)

        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(
            notebook,
            proportion=1,
            flag=wx.EXPAND | wx.ALL,
            border=5)
        mainSizer.Add(btnSizer, proportion=0,
                      flag=wx.ALIGN_RIGHT, border=5)

        self.Bind(wx.EVT_CLOSE, self.OnCancel)

        self.SetSizer(mainSizer)
        mainSizer.Fit(self)

    def _createSymbologyPage(self, notebook):
        """Create notebook page concerning symbology settings"""
        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Symbology"))

        sizer = wx.BoxSizer(wx.VERTICAL)

        flexSizer = wx.FlexGridSizer(cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)

        self.symbology = {}
        for label, key in self._symbologyData():
            textLabel = StaticText(panel, wx.ID_ANY, label)
            color = csel.ColourSelect(
                panel, id=wx.ID_ANY, colour=UserSettings.Get(
                    group='vdigit', key='symbol', subkey=[
                        key, 'color']), size=(
                    40, 25))
            isEnabled = UserSettings.Get(group='vdigit', key='symbol',
                                         subkey=[key, 'enabled'])
            if isEnabled is not None:
                enabled = wx.CheckBox(panel, id=wx.ID_ANY, label="")
                enabled.SetValue(isEnabled)
                self.symbology[key] = (enabled, color)
            else:
                enabled = (1, 1)
                self.symbology[key] = (None, color)

            flexSizer.Add(
                textLabel,
                proportion=0,
                flag=wx.ALIGN_CENTER_VERTICAL)
            flexSizer.Add(
                enabled,
                proportion=0,
                flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
            flexSizer.Add(
                color,
                proportion=0,
                flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE)
            color.SetName("GetColour")

        sizer.Add(
            flexSizer,
            proportion=1,
            flag=wx.ALL | wx.EXPAND,
            border=10)

        panel.SetSizer(sizer)

        return panel

    def _createGeneralPage(self, notebook):
        """Create notebook page concerning general settings"""
        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("General"))

        border = wx.BoxSizer(wx.VERTICAL)

        #
        # display section
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Display"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        flexSizer = wx.FlexGridSizer(cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        # line width
        text = StaticText(parent=panel, id=wx.ID_ANY, label=_("Line width"))
        self.lineWidthValue = SpinCtrl(
            parent=panel, id=wx.ID_ANY, size=(75, -1),
            initial=UserSettings.Get(
                group='vdigit', key="lineWidth", subkey='value'),
            min=1, max=1e6)
        units = StaticText(
            parent=panel, id=wx.ID_ANY, size=(115, -1),
            label=UserSettings.Get(
                group='vdigit', key="lineWidth", subkey='units'),
            style=wx.ALIGN_LEFT)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(
            self.lineWidthValue,
            proportion=0,
            flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(
            units,
            proportion=0,
            flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL | wx.LEFT,
            border=10)

        sizer.Add(
            flexSizer,
            proportion=1,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        border.Add(sizer, proportion=0, flag=wx.ALL | wx.EXPAND, border=5)

        #
        # snapping section
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Snapping"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        flexSizer = wx.FlexGridSizer(cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)

        # snapping
        text = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Snapping threshold"))
        self.snappingValue = SpinCtrl(
            parent=panel, id=wx.ID_ANY, size=(75, -1),
            initial=UserSettings.Get(
                group='vdigit', key="snapping", subkey='value'),
            min=-1, max=1e6)
        self.snappingValue.Bind(wx.EVT_SPINCTRL, self.OnChangeSnappingValue)
        self.snappingValue.Bind(wx.EVT_TEXT, self.OnChangeSnappingValue)
        self.snappingUnit = wx.Choice(parent=panel, id=wx.ID_ANY, size=(
            125, -1), choices=[_("screen pixels"), _("map units")])
        try:
            self.snappingUnit.SetSelection(UserSettings.Get(group='vdigit',
                                                            key="snapping",
                                                            subkey='unit'))
        except:
            self.snappingUnit.SetSelection(0)
        self.snappingUnit.Bind(wx.EVT_CHOICE, self.OnChangeSnappingUnits)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(
            self.snappingValue,
            proportion=0,
            flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(
            self.snappingUnit,
            proportion=0,
            flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE)

        vertexSizer = wx.BoxSizer(wx.VERTICAL)
        self.snapVertex = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                      label=_("Snap also to vertex"))
        self.snapVertex.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="snapToVertex",
                subkey='enabled'))
        vertexSizer.Add(self.snapVertex, proportion=0, flag=wx.EXPAND)
        self.mapUnits = self.parent.MapWindow.Map.GetProjInfo()['units']
        self.snappingInfo = StaticText(
            parent=panel, id=wx.ID_ANY,
            label=_("Snapping threshold is %(value).1f %(units)s") %
            {'value': self.digit.GetDisplay().GetThreshold(),
             'units': self.mapUnits})
        vertexSizer.Add(self.snappingInfo, proportion=0,
                        flag=wx.ALL | wx.EXPAND, border=1)

        sizer.Add(flexSizer, proportion=1, flag=wx.EXPAND)
        sizer.Add(vertexSizer, proportion=1, flag=wx.EXPAND)
        border.Add(sizer, proportion=0, flag=wx.LEFT |
                   wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)

        #
        # select box
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Select vector features"))
        # feature type
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        inSizer = wx.BoxSizer(wx.HORIZONTAL)
        self.selectFeature = {}
        for feature in ('point', 'line',
                        'centroid', 'boundary'):
            chkbox = wx.CheckBox(parent=panel, label=feature)
            self.selectFeature[feature] = chkbox.GetId()
            chkbox.SetValue(UserSettings.Get(group='vdigit', key='selectType',
                                             subkey=[feature, 'enabled']))
            inSizer.Add(chkbox, proportion=0,
                        flag=wx.EXPAND | wx.ALL, border=5)
        sizer.Add(inSizer, proportion=0, flag=wx.EXPAND)
        # threshold
        flexSizer = wx.FlexGridSizer(cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        text = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Select threshold"))
        self.selectThreshValue = SpinCtrl(
            parent=panel, id=wx.ID_ANY, size=(75, -1),
            initial=UserSettings.Get(
                group='vdigit', key="selectThresh", subkey='value'),
            min=1, max=1e6)
        units = StaticText(
            parent=panel, id=wx.ID_ANY, size=(115, -1),
            label=UserSettings.Get(
                group='vdigit', key="lineWidth", subkey='units'),
            style=wx.ALIGN_LEFT)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.selectThreshValue, proportion=0,
                      flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(
            units,
            proportion=0,
            flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL | wx.LEFT,
            border=10)

        self.selectIn = wx.CheckBox(parent=panel, id=wx.ID_ANY, label=_(
            "Select only features inside of selection bounding box"))
        self.selectIn.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="selectInside",
                subkey='enabled'))
        self.selectIn.SetToolTipString(
            _("By default are selected all features overlapping selection bounding box "))

        self.checkForDupl = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                        label=_("Check for duplicates"))
        self.checkForDupl.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="checkForDupl",
                subkey='enabled'))

        sizer.Add(flexSizer, proportion=0, flag=wx.EXPAND)
        sizer.Add(
            self.selectIn,
            proportion=0,
            flag=wx.EXPAND | wx.ALL,
            border=1)
        sizer.Add(
            self.checkForDupl,
            proportion=0,
            flag=wx.EXPAND | wx.ALL,
            border=1)
        border.Add(sizer, proportion=0, flag=wx.EXPAND |
                   wx.LEFT | wx.RIGHT | wx.BOTTOM, border=5)

        #
        # digitize lines box
        #
        box = StaticBox(
            parent=panel, id=wx.ID_ANY, label=" %s " %
            _("Digitize lines/boundaries"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        self.intersect = wx.CheckBox(
            parent=panel, label=_("Break lines at intersection"))
        self.intersect.SetValue(
            UserSettings.Get(
                group='vdigit',
                key='breakLines',
                subkey='enabled'))

        sizer.Add(
            self.intersect,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)

        border.Add(sizer, proportion=0, flag=wx.EXPAND |
                   wx.LEFT | wx.RIGHT | wx.BOTTOM, border=5)

        #
        # digitize areas box
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Digitize areas"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        self.closeBoundary = wx.CheckBox(
            parent=panel, label=_("Close boundary (snap to the start node)"))
        self.closeBoundary.SetValue(
            UserSettings.Get(
                group='vdigit',
                key='closeBoundary',
                subkey='enabled'))

        sizer.Add(
            self.closeBoundary,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)

        border.Add(sizer, proportion=0, flag=wx.EXPAND |
                   wx.LEFT | wx.RIGHT | wx.BOTTOM, border=5)

        #
        # save-on-exit box
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Save changes"))
        # save changes on exit?
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        self.save = wx.CheckBox(parent=panel, label=_("Save changes on exit"))
        self.save.SetValue(
            UserSettings.Get(
                group='vdigit',
                key='saveOnExit',
                subkey='enabled'))
        sizer.Add(
            self.save,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        border.Add(sizer, proportion=0, flag=wx.EXPAND |
                   wx.LEFT | wx.RIGHT | wx.BOTTOM, border=5)

        panel.SetSizer(border)

        return panel

    def _createQueryPage(self, notebook):
        """Create notebook page for query tool"""
        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Query tool"))

        border = wx.BoxSizer(wx.VERTICAL)

        #
        # query tool box
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Choose query tool"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        LocUnits = self.parent.MapWindow.Map.GetProjInfo()['units']

        self.queryBox = wx.CheckBox(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Select by box"))
        self.queryBox.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="query",
                subkey='box'))

        sizer.Add(
            self.queryBox,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        sizer.Add((0, 5))

        #
        # length
        #
        self.queryLength = wx.RadioButton(
            parent=panel, id=wx.ID_ANY, label=_("length"))
        self.queryLength.Bind(wx.EVT_RADIOBUTTON, self.OnChangeQuery)
        sizer.Add(
            self.queryLength,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        flexSizer = wx.FlexGridSizer(cols=4, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        txt = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Select lines"))
        self.queryLengthSL = wx.Choice(
            parent=panel, id=wx.ID_ANY, choices=[
                _("shorter than"), _("longer than")])
        self.queryLengthSL.SetSelection(
            UserSettings.Get(
                group='vdigit',
                key="queryLength",
                subkey='than-selection'))
        self.queryLengthValue = SpinCtrl(
            parent=panel, id=wx.ID_ANY, size=(
                100, -1), initial=1, min=0, max=1e6)
        self.queryLengthValue.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="queryLength",
                subkey='thresh'))
        units = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label="%s" %
            LocUnits)
        flexSizer.Add(txt, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(
            self.queryLengthSL,
            proportion=0,
            flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(
            self.queryLengthValue,
            proportion=0,
            flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(units, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        sizer.Add(
            flexSizer,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)

        #
        # dangle
        #
        self.queryDangle = wx.RadioButton(
            parent=panel, id=wx.ID_ANY, label=_("dangle"))
        self.queryDangle.Bind(wx.EVT_RADIOBUTTON, self.OnChangeQuery)
        sizer.Add(
            self.queryDangle,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        flexSizer = wx.FlexGridSizer(cols=4, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        txt = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Select dangles"))
        self.queryDangleSL = wx.Choice(
            parent=panel, id=wx.ID_ANY, choices=[
                _("shorter than"), _("longer than")])
        self.queryDangleSL.SetSelection(
            UserSettings.Get(
                group='vdigit',
                key="queryDangle",
                subkey='than-selection'))
        self.queryDangleValue = SpinCtrl(
            parent=panel, id=wx.ID_ANY, size=(
                100, -1), initial=1, min=0, max=1e6)
        self.queryDangleValue.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="queryDangle",
                subkey='thresh'))
        units = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label="%s" %
            LocUnits)
        flexSizer.Add(txt, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(
            self.queryDangleSL,
            proportion=0,
            flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(
            self.queryDangleValue,
            proportion=0,
            flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(units, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        sizer.Add(
            flexSizer,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)

        if UserSettings.Get(group='vdigit', key="query",
                            subkey='selection') == 0:
            self.queryLength.SetValue(True)
        else:
            self.queryDangle.SetValue(True)

        # enable & disable items
        self.OnChangeQuery(None)

        border.Add(sizer, proportion=0, flag=wx.ALL | wx.EXPAND, border=5)

        panel.SetSizer(border)

        return panel

    def _createAttributesPage(self, notebook):
        """Create notebook page for attributes"""
        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Attributes"))

        border = wx.BoxSizer(wx.VERTICAL)

        #
        # add new record
        #
        box = StaticBox(
            parent=panel,
            id=wx.ID_ANY,
            label=" %s " %
            _("Digitize new feature"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        # checkbox
        self.addRecord = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                     label=_("Add new record into table"))
        self.addRecord.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="addRecord",
                subkey='enabled'))
        sizer.Add(
            self.addRecord,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        # settings
        flexSizer = wx.FlexGridSizer(cols=2, hgap=3, vgap=3)
        flexSizer.AddGrowableCol(0)
        settings = ((_("Layer"), 1), (_("Category"), 1),
                    (_("Mode"), _("Next to use")))
        # layer
        text = StaticText(parent=panel, id=wx.ID_ANY, label=_("Layer"))
        self.layer = SpinCtrl(parent=panel, id=wx.ID_ANY, size=(125, -1),
                              min=1, max=1e3)
        self.layer.SetValue(int(UserSettings.Get(
            group='vdigit', key="layer", subkey='value')))
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.layer, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        # category number
        text = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Category number"))
        self.category = SpinCtrl(
            parent=panel, id=wx.ID_ANY, size=(125, -1),
            initial=UserSettings.Get(
                group='vdigit', key="category", subkey='value'),
            min=-1e9, max=1e9)
        if UserSettings.Get(group='vdigit', key="categoryMode",
                            subkey='selection') != 1:
            self.category.Enable(False)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.category, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        # category mode
        text = StaticText(
            parent=panel,
            id=wx.ID_ANY,
            label=_("Category mode"))
        self.categoryMode = wx.Choice(parent=panel, id=wx.ID_ANY, size=(
            125, -1), choices=[_("Next to use"), _("Manual entry"), _("No category")])
        self.categoryMode.SetSelection(
            UserSettings.Get(
                group='vdigit',
                key="categoryMode",
                subkey='selection'))
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.categoryMode, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)

        sizer.Add(
            flexSizer,
            proportion=1,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        border.Add(sizer, proportion=0,
                   flag=wx.ALL | wx.EXPAND, border=5)

        #
        # delete existing record
        #
        box = StaticBox(
            parent=panel, id=wx.ID_ANY, label=" %s " %
            _("Delete existing feature(s)"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        # checkbox
        self.deleteRecord = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                        label=_("Delete record from table"))
        self.deleteRecord.SetValue(
            UserSettings.Get(
                group='vdigit',
                key="delRecord",
                subkey='enabled'))
        sizer.Add(
            self.deleteRecord,
            proportion=0,
            flag=wx.ALL | wx.EXPAND,
            border=1)
        border.Add(sizer, proportion=0,
                   flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)

        #
        # geometry attributes (currently only length and area are supported)
        #
        box = StaticBox(parent=panel, id=wx.ID_ANY,
                        label=" %s " % _("Geometry attributes"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        gridSizer = wx.GridBagSizer(hgap=3, vgap=3)
        self.geomAttrb = {'length': {'label': _('length')},
                          'area': {'label': _('area')},
                          'perimeter': {'label': _('perimeter')}}

        digitToolbar = self.parent.toolbars['vdigit']
        try:
            vectorName = digitToolbar.GetLayer().GetName()
        except AttributeError:
            vectorName = None  # no vector selected for editing
        layer = UserSettings.Get(group='vdigit', key="layer", subkey='value')
        mapLayer = self.parent.toolbars['vdigit'].GetLayer()
        tree = self.parent.tree
        if tree:
            item = tree.FindItemByData('maplayer', mapLayer)
        else:
            item = None
        row = 0
        for attrb in ['length', 'area', 'perimeter']:
            # checkbox
            check = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                label=self.geomAttrb[attrb]['label'])
            ### self.deleteRecord.SetValue(UserSettings.Get(group='vdigit', key="delRecord", subkey='enabled'))
            check.Bind(wx.EVT_CHECKBOX, self.OnGeomAttrb)
            # column (only numeric)
            column = ColumnSelect(parent=panel, size=(200, -1))
            column.InsertColumns(vector=vectorName,
                                 layer=layer, excludeKey=True,
                                 type=['integer', 'double precision'])
            # units
            if attrb == 'area':
                choices = Units.GetUnitsList('area')
            else:
                choices = Units.GetUnitsList('length')
            win_units = wx.Choice(parent=panel, id=wx.ID_ANY,
                                  choices=choices, size=(120, -1))

            # default values
            check.SetValue(False)
            if item and tree.GetLayerInfo(item, key='vdigit') and \
                    'geomAttr' in tree.GetLayerInfo(item, key='vdigit') and \
                    attrb in tree.GetLayerInfo(item, key='vdigit')['geomAttr']:
                check.SetValue(True)
                column.SetStringSelection(
                    tree.GetLayerInfo(item, key='vdigit')['geomAttr']
                    [attrb]['column'])
                if attrb == 'area':
                    type = 'area'
                else:
                    type = 'length'
                unitsIdx = Units.GetUnitsIndex(type, tree.GetLayerInfo(
                    item, key='vdigit')['geomAttr'][attrb]['units'])
                win_units.SetSelection(unitsIdx)

            if not vectorName:
                check.Enable(False)
                column.Enable(False)

            if not check.IsChecked():
                column.Enable(False)

            self.geomAttrb[attrb]['check'] = check.GetId()
            self.geomAttrb[attrb]['column'] = column.GetId()
            self.geomAttrb[attrb]['units'] = win_units.GetId()

            gridSizer.Add(check,
                          flag=wx.ALIGN_CENTER_VERTICAL,
                          pos=(row, 0))
            gridSizer.Add(column,
                          pos=(row, 1))
            gridSizer.Add(win_units,
                          pos=(row, 2))
            row += 1

        note = '\n'.join(textwrap.wrap(_("Note: These settings are stored "
                                         "in the workspace not in the vector digitizer "
                                         "preferences."), 55))
        gridSizer.Add(StaticText(parent=panel, id=wx.ID_ANY,
                                 label=note),
                      pos=(3, 0), span=(1, 3))

        gridSizer.AddGrowableCol(0)
        sizer.Add(gridSizer, proportion=1,
                  flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(sizer, proportion=0,
                   flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)

        # bindings
        self.Bind(wx.EVT_CHECKBOX, self.OnChangeAddRecord, self.addRecord)
        self.Bind(wx.EVT_CHOICE, self.OnChangeCategoryMode, self.categoryMode)
        self.Bind(wx.EVT_SPINCTRL, self.OnChangeLayer, self.layer)

        panel.SetSizer(border)

        return panel

    def _symbologyData(self):
        """Data for _createSymbologyPage()

        label | checkbox | color
        """

        return (
            (_("Digitize new line segment"), "newSegment"),
            (_("Digitize new line/boundary"), "newLine"),
            (_("Highlight"), "highlight"),
            (_("Highlight (duplicates)"), "highlightDupl"),
            (_("Point"), "point"),
            (_("Line"), "line"),
            (_("Boundary (no area)"), "boundaryNo"),
            (_("Boundary (one area)"), "boundaryOne"),
            (_("Boundary (two areas)"), "boundaryTwo"),
            (_("Centroid (in area)"), "centroidIn"),
            (_("Centroid (outside area)"), "centroidOut"),
            (_("Centroid (duplicate in area)"), "centroidDup"),
            (_("Node (one line)"), "nodeOne"),
            (_("Node (two lines)"), "nodeTwo"),
            (_("Vertex"), "vertex"),
            (_("Area (closed boundary + centroid)"), "area"),
            (_("Direction"), "direction"),)

    def OnGeomAttrb(self, event):
        """Register geometry attributes (enable/disable)
        """
        checked = event.IsChecked()
        id = event.GetId()
        key = None
        for attrb, val in six.iteritems(self.geomAttrb):
            if val['check'] == id:
                key = attrb
                break

        column = self.FindWindowById(self.geomAttrb[key]['column'])
        if checked:
            column.Enable()
        else:
            column.Enable(False)

    def OnChangeCategoryMode(self, event):
        """Change category mode
        """
        mode = event.GetSelection()
        UserSettings.Set(
            group='vdigit',
            key="categoryMode",
            subkey='selection',
            value=mode)
        if mode == 1:  # manual entry
            self.category.Enable(True)
        elif self.category.IsEnabled():  # disable
            self.category.Enable(False)

        if mode == 2 and self.addRecord.IsChecked():  # no category
            self.addRecord.SetValue(False)

        self.digit.SetCategory()
        self.category.SetValue(
            UserSettings.Get(
                group='vdigit',
                key='category',
                subkey='value'))

    def OnChangeLayer(self, event):
        """Layer changed
        """
        layer = event.GetInt()
        if layer > 0:
            UserSettings.Set(
                group='vdigit',
                key='layer',
                subkey='value',
                value=layer)
            self.digit.SetCategory()
            self.category.SetValue(
                UserSettings.Get(
                    group='vdigit',
                    key='category',
                    subkey='value'))

        event.Skip()

    def OnChangeAddRecord(self, event):
        """Checkbox 'Add new record' status changed
        """
        pass
        # self.category.SetValue(self.digit.SetCategory())

    def OnChangeSnappingValue(self, event):
        """Change snapping value - update static text
        """
        value = self.snappingValue.GetValue()

        if value < 0:
            region = self.parent.MapWindow.Map.GetRegion()
            res = (region['nsres'] + region['ewres']) / 2.
            threshold = self.digit.GetDisplay().GetThreshold(value=res)
        else:
            if self.snappingUnit.GetSelection() == 1:  # map units
                threshold = value
            else:
                threshold = self.digit.GetDisplay().GetThreshold(value=value)

        if value == 0:
            self.snappingInfo.SetLabel(_("Snapping disabled"))
        elif value < 0:
            self.snappingInfo.SetLabel(
                _(
                    "Snapping threshold is %(value).1f %(units)s "
                    "(based on comp. resolution)") %
                {'value': threshold, 'units': self.mapUnits.lower()})
        else:
            self.snappingInfo.SetLabel(
                _("Snapping threshold is %(value).1f %(units)s") %
                {'value': threshold, 'units': self.mapUnits.lower()})

        event.Skip()

    def OnChangeSnappingUnits(self, event):
        """Snapping units change -> update static text
        """
        value = self.snappingValue.GetValue()
        units = self.snappingUnit.GetSelection()
        threshold = self.digit.GetDisplay().GetThreshold(value=value, units=units)

        if units == 1:  # map units
            self.snappingInfo.SetLabel(
                _("Snapping threshold is %(value).1f %(units)s") %
                {'value': value, 'units': self.mapUnits})
        else:
            self.snappingInfo.SetLabel(
                _("Snapping threshold is %(value).1f %(units)s") %
                {'value': threshold, 'units': self.mapUnits})

        event.Skip()

    def OnChangeQuery(self, event):
        """Change query
        """
        if self.queryLength.GetValue():
            # length
            self.queryLengthSL.Enable(True)
            self.queryLengthValue.Enable(True)
            self.queryDangleSL.Enable(False)
            self.queryDangleValue.Enable(False)
        else:
            # dangle
            self.queryLengthSL.Enable(False)
            self.queryLengthValue.Enable(False)
            self.queryDangleSL.Enable(True)
            self.queryDangleValue.Enable(True)

    def OnSave(self, event):
        """Button 'Save' pressed
        """
        self.UpdateSettings()
        self.parent.toolbars['vdigit'].settingsDialog = None

        fileSettings = {}
        UserSettings.ReadSettingsFile(settings=fileSettings)
        fileSettings['vdigit'] = UserSettings.Get(group='vdigit')

        sfile = UserSettings.SaveToFile(fileSettings)
        self._giface.WriteLog(
            _('Vector digitizer settings saved to file <%s>.') %
            sfile)

        self.Destroy()

        event.Skip()

    def OnApply(self, event):
        """Button 'Apply' pressed
        """
        self.UpdateSettings()

    def OnCancel(self, event):
        """Button 'Cancel' pressed
        """
        self.parent.toolbars['vdigit'].settingsDialog = None
        self.Destroy()

        if event:
            event.Skip()

    def UpdateSettings(self):
        """Update digitizer settings

        .. todo::
            Needs refactoring
        """
        # TODO: it seems that it needs to be replaced by signal
        # but if it makes sense generally for wxGUI it can be added to giface
        if self.parent.GetLayerManager():
            self.parent.GetLayerManager().WorkspaceChanged()  # geometry attributes
        # symbology
        for key, (enabled, color) in six.iteritems(self.symbology):
            if enabled:
                UserSettings.Set(group='vdigit', key='symbol',
                                 subkey=[key, 'enabled'],
                                 value=enabled.IsChecked())
                UserSettings.Set(group='vdigit', key='symbol',
                                 subkey=[key, 'color'],
                                 value=tuple(color.GetColour()))
            else:
                UserSettings.Set(group='vdigit', key='symbol',
                                 subkey=[key, 'color'],
                                 value=tuple(color.GetColour()))
        # display
        UserSettings.Set(group='vdigit', key="lineWidth", subkey='value',
                         value=int(self.lineWidthValue.GetValue()))

        # snapping
        UserSettings.Set(group='vdigit', key="snapping", subkey='value',
                         value=int(self.snappingValue.GetValue()))
        UserSettings.Set(group='vdigit', key="snapping", subkey='unit',
                         value=self.snappingUnit.GetSelection())
        UserSettings.Set(group='vdigit', key="snapToVertex", subkey='enabled',
                         value=self.snapVertex.IsChecked())

        # digitize new feature
        UserSettings.Set(group='vdigit', key="addRecord", subkey='enabled',
                         value=self.addRecord.IsChecked())
        UserSettings.Set(group='vdigit', key="layer", subkey='value',
                         value=int(self.layer.GetValue()))
        UserSettings.Set(group='vdigit', key="category", subkey='value',
                         value=int(self.category.GetValue()))
        UserSettings.Set(
            group='vdigit',
            key="categoryMode",
            subkey='selection',
            value=self.categoryMode.GetSelection())

        # delete existing feature
        UserSettings.Set(group='vdigit', key="delRecord", subkey='enabled',
                         value=self.deleteRecord.IsChecked())

        # geometry attributes (workspace)
        mapLayer = self.parent.toolbars['vdigit'].GetLayer()
        tree = self._giface.GetLayerTree()
        if tree:
            item = tree.FindItemByData('maplayer', mapLayer)
        else:
            item = None
        for key, val in six.iteritems(self.geomAttrb):
            checked = self.FindWindowById(val['check']).IsChecked()
            column = self.FindWindowById(val['column']).GetValue()
            unitsIdx = self.FindWindowById(val['units']).GetSelection()
            if item and not tree.GetLayerInfo(item, key='vdigit'):
                tree.SetLayerInfo(
                    item, key='vdigit', value={
                        'geomAttr': dict()})

            if checked:  # enable
                if key == 'area':
                    type = key
                else:
                    type = 'length'
                unitsKey = Units.GetUnitsKey(type, unitsIdx)
                tree.GetLayerInfo(item, key='vdigit')['geomAttr'][key] = {
                    'column': column, 'units': unitsKey}
            else:
                if item and tree.GetLayerInfo(
                        item, key='vdigit') and key in tree.GetLayerInfo(
                        item, key='vdigit')['geomAttr']:
                    del tree.GetLayerInfo(item, key='vdigit')['geomAttr'][key]

        # query tool
        if self.queryLength.GetValue():
            UserSettings.Set(group='vdigit', key="query", subkey='selection',
                             value=0)
        else:
            UserSettings.Set(group='vdigit', key="query", subkey='type',
                             value=1)
        UserSettings.Set(group='vdigit', key="query", subkey='box',
                         value=self.queryBox.IsChecked())
        UserSettings.Set(
            group='vdigit',
            key="queryLength",
            subkey='than-selection',
            value=self.queryLengthSL.GetSelection())
        UserSettings.Set(group='vdigit', key="queryLength", subkey='thresh',
                         value=int(self.queryLengthValue.GetValue()))
        UserSettings.Set(
            group='vdigit',
            key="queryDangle",
            subkey='than-selection',
            value=self.queryDangleSL.GetSelection())
        UserSettings.Set(group='vdigit', key="queryDangle", subkey='thresh',
                         value=int(self.queryDangleValue.GetValue()))

        # select features
        for feature in ('point', 'line',
                        'centroid', 'boundary'):
            UserSettings.Set(
                group='vdigit', key='selectType', subkey=[
                    feature, 'enabled'], value=self.FindWindowById(
                    self.selectFeature[feature]).IsChecked())
        UserSettings.Set(group='vdigit', key="selectThresh", subkey='value',
                         value=int(self.selectThreshValue.GetValue()))
        UserSettings.Set(group='vdigit', key="checkForDupl", subkey='enabled',
                         value=self.checkForDupl.IsChecked())
        UserSettings.Set(group='vdigit', key="selectInside", subkey='enabled',
                         value=self.selectIn.IsChecked())

        # on-exit
        UserSettings.Set(group='vdigit', key="saveOnExit", subkey='enabled',
                         value=self.save.IsChecked())

        # break lines
        UserSettings.Set(group='vdigit', key="breakLines", subkey='enabled',
                         value=self.intersect.IsChecked())

        # close boundary
        UserSettings.Set(group='vdigit', key="closeBoundary", subkey='enabled',
                         value=self.closeBoundary.IsChecked())

        self.digit.UpdateSettings()

        # redraw map if auto-rendering is enabled
        if self.parent.IsAutoRendered():
            self.parent.OnRender(None)
