import wx
import metrics

class PreferenceFrame(wx.Frame):
   """
   This allows the user to set their preferences. Changes automatically
   update as the user makes them; when they're done, they close the window.
   """

   def __init__(self, app, parent = None):
       self.app = app
       wx.Frame.__init__(self, parent, wx.ID_ANY, title = self.app.NAME + ' Preferences', \
                         style = wx.MINIMIZE_BOX | wx.CLOSE_BOX | wx.CAPTION | wx.SYSTEM_MENU)

       panel = wx.Panel(parent = self, id = wx.ID_ANY)
       borderSizer = wx.BoxSizer(wx.VERTICAL)
       panel.SetSizer(borderSizer)
       panelSizer = wx.FlexGridSizer(14, 2, metrics.size('relatedControls'), metrics.size('relatedControls'))
       borderSizer.Add(panelSizer, flag = wx.ALL, border = metrics.size('windowBorder'))

       self.editorFont = wx.FontPickerCtrl(panel, style = wx.FNTP_FONTDESC_AS_LABEL)
       self.editorFont.SetSelectedFont(self.getPrefFont('windowed'))
       self.editorFont.Bind(wx.EVT_FONTPICKER_CHANGED, lambda e: self.saveFontPref('windowed', \
                            self.editorFont.GetSelectedFont()))

       self.monoFont = wx.FontPickerCtrl(panel, style = wx.FNTP_FONTDESC_AS_LABEL)
       self.monoFont.SetSelectedFont(self.getPrefFont('monospace'))
       self.monoFont.Bind(wx.EVT_FONTPICKER_CHANGED, lambda e: self.saveFontPref('monospace', \
                            self.monoFont.GetSelectedFont()))

       self.fsFont = wx.FontPickerCtrl(panel, style = wx.FNTP_FONTDESC_AS_LABEL)
       self.fsFont.SetSelectedFont(self.getPrefFont('fs'))
       self.fsFont.Bind(wx.EVT_FONTPICKER_CHANGED, lambda e: self.saveFontPref('fs', \
                        self.fsFont.GetSelectedFont()))

       self.fsTextColor = wx.ColourPickerCtrl(panel)
       self.fsTextColor.SetColour(self.app.config.Read('fsTextColor'))
       self.fsTextColor.Bind(wx.EVT_COLOURPICKER_CHANGED, lambda e: self.savePref('fsTextColor', \
                             self.fsTextColor.GetColour()))

       self.fsBgColor = wx.ColourPickerCtrl(panel)
       self.fsBgColor.SetColour(self.app.config.Read('fsBgColor'))
       self.fsBgColor.Bind(wx.EVT_COLOURPICKER_CHANGED, lambda e: self.savePref('fsBgColor', \
                             self.fsBgColor.GetColour()))

       fsLineHeightPanel = wx.Panel(panel)
       fsLineHeightSizer = wx.BoxSizer(wx.HORIZONTAL)
       fsLineHeightPanel.SetSizer(fsLineHeightSizer)

       self.fsLineHeight = wx.ComboBox(fsLineHeightPanel, choices = ('100', '125', '150', '175', '200'))
       self.fsLineHeight.Bind(wx.EVT_TEXT, lambda e: self.savePref('fsLineHeight', int(self.fsLineHeight.GetValue())))
       self.fsLineHeight.SetValue(str(self.app.config.ReadInt('fslineHeight')))

       fsLineHeightSizer.Add(self.fsLineHeight, flag = wx.ALIGN_CENTER_VERTICAL)
       fsLineHeightSizer.Add(wx.StaticText(fsLineHeightPanel, label = '%'), flag = wx.ALIGN_CENTER_VERTICAL)

       def checkbox(self, name, label, panel=panel):
           setattr(self, name, wx.CheckBox(panel, label=label))
           attr = getattr(self, name)
           attr.Bind(wx.EVT_CHECKBOX, lambda e, name=name, attr=attr: self.savePref(name, attr.GetValue()))
           attr.SetValue(self.app.config.ReadBool(name))

       checkbox(self, "fastStoryPanel", 'Faster but rougher story map display')
       checkbox(self, "flatDesign", 'Flat Design(TM) mode')
       checkbox(self, "imageArrows", 'Connector arrows for images and stylesheets')
       checkbox(self, "displayArrows", 'Connector arrows for <<display>>ed passages')
       checkbox(self, "createPassagePrompt", 'Offer to create new passages for broken links')
       checkbox(self, "importImagePrompt", 'Offer to import externally linked images')
       checkbox(self, "passageWarnings", 'Warn about possible passage code errors')

       panelSizer.Add(wx.StaticText(panel, label = 'Normal Font'), flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(self.editorFont)
       panelSizer.Add(wx.StaticText(panel, label = 'Monospace Font'), flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(self.monoFont)
       panelSizer.Add(wx.StaticText(panel, label = 'Fullscreen Editor Font'), flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(self.fsFont)
       panelSizer.Add(wx.StaticText(panel, label = 'Fullscreen Editor Text Color'), flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(self.fsTextColor)
       panelSizer.Add(wx.StaticText(panel, label = 'Fullscreen Editor Background Color'), \
                      flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(self.fsBgColor)
       panelSizer.Add(wx.StaticText(panel, label = 'Fullscreen Editor Line Spacing'), flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(fsLineHeightPanel, flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add(self.fastStoryPanel) # pylint: disable=no-member
       panelSizer.Add((1,2))
       panelSizer.Add(self.flatDesign) # pylint: disable=no-member
       panelSizer.Add((1,2))
       panelSizer.Add(self.imageArrows) # pylint: disable=no-member
       panelSizer.Add((1,2))
       panelSizer.Add(self.displayArrows) # pylint: disable=no-member
       panelSizer.Add((1,2))
       panelSizer.Add(wx.StaticText(panel, label = 'When closing a passage:'), flag = wx.ALIGN_CENTER_VERTICAL)
       panelSizer.Add((1,2))
       panelSizer.Add(self.createPassagePrompt) # pylint: disable=no-member
       panelSizer.Add((1,2))
       panelSizer.Add(self.importImagePrompt) # pylint: disable=no-member
       panelSizer.Add((1,2))
       panelSizer.Add(self.passageWarnings) # pylint: disable=no-member

       panelSizer.Fit(self)
       borderSizer.Fit(self)
       self.SetIcon(self.app.icon)
       self.Show()
       self.panelSizer = panelSizer
       self.borderSizer = borderSizer

   def getPrefFont(self, key):
       """
       Returns a font saved in preferences as a wx.Font instance.
       """
       return wx.Font(self.app.config.ReadInt(key + 'FontSize'), wx.FONTFAMILY_MODERN, \
                      wx.FONTSTYLE_NORMAL, wx.NORMAL, False, self.app.config.Read(key + 'FontFace'))

   def savePref(self, key, value):
       """
       Saves changes to a preference and sends an update message to the application.
       """
       if isinstance(value, wx.Colour):
           self.app.config.Write(key, value.GetAsString(wx.C2S_HTML_SYNTAX))
       elif type(value) is int:
           self.app.config.WriteInt(key, value)
       elif type(value) is bool:
           self.app.config.WriteBool(key, value)
       else:
           self.app.config.Write(key, value)

       self.app.applyPrefs()

   def saveFontPref(self, key, font):
       """
       Saves a user-chosen font to preference keys, then sends an update message to the application.
       """
       self.app.config.Write(key + 'FontFace', font.GetFaceName())
       self.app.config.WriteInt(key + 'FontSize', font.GetPointSize())
       self.app.applyPrefs()
       self.panelSizer.Fit(self)
       self.borderSizer.Fit(self)

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