# ControlledPreferences

- `Download example`

A PyObjC Example without documentation

## Sources

### ControlledPreferences.py

    #
    #  ControlledPreferences
    #
    #

    # import classes required to start application
    import FontNameToDisplayNameTransformer  # noqa: F401
    import FontSampleDisplayView  # noqa: F401
    import PreferencesPanelController  # noqa: F401
    from PyObjCTools import AppHelper

    # start the event loop
    AppHelper.runEventLoop()

### FontNameToDisplayNameTransformer.py

    #
    #  FontNameToDisplayNameTransformer.py
    #  ControlledPreferences
    #
    #  Converted by u.fiedler on 04.02.05.
    #  with great help from Bob Ippolito - Thank you Bob!
    #
    #  The original version was written in Objective-C by Malcolm Crawford
    #  at http://homepage.mac.com/mmalc/CocoaExamples/controllers.html

    from Cocoa import NSFont, NSString, NSValueTransformer

    class FontNameToDisplayNameTransformer(NSValueTransformer):
        """
        Takes as input the fontName of a font as stored in user defaults,
        returns the displayed font name of the font to show to the user.
        """

        @classmethod
        def transformedValueClass(cls):
            return NSString

        @classmethod
        def allowsReverseTransformation(cls):
            return False

        def transformedValue_(self, aValue):
            font = NSFont.fontWithName_size_(aValue, 12)
            return font.displayName()

### FontSampleDisplayView.py

    #
    #  FontSampleDisplayView.py
    #  ControlledPreferences
    #
    #  Converted by u.fiedler on 04.02.05.
    #  with great help from Bob Ippolito - Thank you Bob!
    #
    #  The original version was written in Objective-C by Malcolm Crawford
    #  at http://homepage.mac.com/mmalc/CocoaExamples/controllers.html

    from Cocoa import (
        NSAttributedString,
        NSDrawLightBezel,
        NSFont,
        NSFontAttributeName,
        NSInsetRect,
        NSMakePoint,
        NSNotificationCenter,
        NSRectFill,
        NSUnarchiver,
        NSUserDefaultsController,
        NSUserDefaultsDidChangeNotification,
        NSView,
    )
    from objc import super  # noqa: A004
    from PyObjCTools.KeyValueCoding import getKey

    class FontSampleDisplayView(NSView):
        """
        Display WordOfTheDay with the preferred font and color
        """

        def drawRect_(self, rect):
            defaults = NSUserDefaultsController.sharedUserDefaultsController().values()
            favoriteColor = NSUnarchiver.unarchiveObjectWithData_(
                getKey(defaults, "FavoriteColor")
            )
            fontName = getKey(defaults, "FontName")
            fontSize = getKey(defaults, "FontSize")
            favoriteFont = NSFont.fontWithName_size_(fontName, fontSize)
            wordOfTheDay = getKey(defaults, "WordOfTheDay")

            # Do the actual drawing
            myBounds = self.bounds()  # = (x, y), (bw, bh)
            NSDrawLightBezel(myBounds, myBounds)
            favoriteColor.set()
            NSRectFill(NSInsetRect(myBounds, 2, 2))
            attrsDictionary = {NSFontAttributeName: favoriteFont}
            attrString = NSAttributedString.alloc().initWithString_attributes_(
                wordOfTheDay, attrsDictionary
            )
            attrSize = attrString.size()  # = (bw, bh)
            attrString.drawAtPoint_(
                NSMakePoint(
                    (attrSize.width / -2) + (myBounds.size.width / 2),
                    (attrSize.height / -2) + (myBounds.size.height / 2),
                )
            )

        def initWithFrame_(self, frameRect):
            self = super().initWithFrame_(frameRect)
            dnc = NSNotificationCenter.defaultCenter()
            dnc.addObserver_selector_name_object_(
                self, "redisplay:", NSUserDefaultsDidChangeNotification, None
            )
            return self

        def redisplay_(self, sender):
            self.setNeedsDisplay_(True)

### PreferencesPanelController.py

    #
    #  PreferencesPanelController.py
    #  ControlledPreferences
    #
    #  Converted by u.fiedler on 04.02.05.
    #  with great help from Bob Ippolito - Thank you Bob!
    #
    #  The original version was written in Objective-C by Malcolm Crawford
    #  at http://homepage.mac.com/mmalc/CocoaExamples/controllers.html

    import objc
    from Cocoa import (
        NSArchiver,
        NSColor,
        NSFont,
        NSFontManager,
        NSUserDefaultsController,
        NSValueTransformer,
        NSWindowController,
    )
    from FontNameToDisplayNameTransformer import FontNameToDisplayNameTransformer
    from PyObjCTools.KeyValueCoding import getKey

    class PreferencesPanelController(NSWindowController):
        @objc.IBAction
        def changeTextFont_(self, sender):
            """The user changed the current font selection, so update the default font"""

            # Get font name and size from user defaults
            defaults = NSUserDefaultsController.sharedUserDefaultsController().values()
            fontName = getKey(defaults, "FontName")
            fontSize = getKey(defaults, "FontSize")

            # Create font from name and size; initialize font panel
            font = NSFont.fontWithName_size_(fontName, fontSize)
            if font is None:
                font = NSFont.systemFontOfSize_(NSFont.systemFontSize())
            NSFontManager.sharedFontManager().setSelectedFont_isMultiple_(font, False)
            NSFontManager.sharedFontManager().orderFrontFontPanel_(self)

            # Set window as firstResponder so we get changeFont: messages
            self.window().makeFirstResponder_(self.window())

        @objc.IBAction
        def changeFont_(self, sender):
            """This is the message the font panel sends when a new font is selected"""
            # Get selected font
            fontManager = NSFontManager.sharedFontManager()
            selectedFont = fontManager.selectedFont()
            if selectedFont is None:
                selectedFont = NSFont.systemFontOfSize_(NSFont.systemFontSize())
            panelFont = fontManager.convertFont_(selectedFont)

            # Get and store details of selected font
            # Note: use fontName, not displayName.  The font name identifies the font to
            # the system, we use a value transformer to show the user the display name
            fontSize = panelFont.pointSize()

            defaults = NSUserDefaultsController.sharedUserDefaultsController().values()
            defaults.setValue_forKey_(panelFont.fontName(), "FontName")
            defaults.setValue_forKey_(fontSize, "FontSize")

    # Set up initial values for defaults:
    # Create dictionary with keys and values for WordOfTheDay, FontName,
    # FontSize, and FavoriteColor.  Mostly straightforward, but:
    #
    # Store the fontName of the font as the default; the textfield displays
    # the font's displayName using a value transformer.
    #
    # The color must be archived -- you can't store NSColors directly in NSUserDefaults.
    dictionary = {}
    dictionary["WordOfTheDay"] = "Today"
    systemFont = NSFont.systemFontOfSize_(NSFont.systemFontSize())
    dictionary["FontName"] = systemFont.fontName()
    dictionary["FontSize"] = systemFont.pointSize()
    archivedColor = NSArchiver.archivedDataWithRootObject_(NSColor.greenColor())
    dictionary["FavoriteColor"] = archivedColor
    NSUserDefaultsController.sharedUserDefaultsController().setInitialValues_(dictionary)

    # Create and register font name value transformer
    transformer = FontNameToDisplayNameTransformer.alloc().init()
    NSValueTransformer.setValueTransformer_forName_(
        transformer, "FontNameToDisplayNameTransformer"
    )

### setup.py

    """
    Script for building the example:

    Usage:
        python3 setup.py py2app
    """
    from setuptools import setup

    setup(
        name="ControlledPreferences",
        app=["ControlledPreferences.py"],
        data_files=["English.lproj"],
        setup_requires=["py2app", "pyobjc-framework-Cocoa"],
    )