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diff --git a/lvc/widgets/osx/simple.py b/lvc/widgets/osx/simple.py
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+# @Base: Miro - an RSS based video player application
+# Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+# Participatory Culture Foundation
+#
+# 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
+# (at your option) 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.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+#
+# In addition, as a special exception, the copyright holders give
+# permission to link the code of portions of this program with the OpenSSL
+# library.
+#
+# You must obey the GNU General Public License in all respects for all of
+# the code used other than OpenSSL. If you modify file(s) with this
+# exception, you may extend this exception to your version of the file(s),
+# but you are not obligated to do so. If you do not wish to do so, delete
+# this exception statement from your version. If you delete this exception
+# statement from all source files in the program, then also delete it here.
+
+from __future__ import division
+import logging
+import math
+
+from AppKit import *
+from Foundation import *
+from objc import YES, NO, nil
+
+from lvc.widgets import widgetconst
+from .base import Widget, SimpleBin, FlippedView
+from .utils import filename_to_unicode
+import drawing
+import wrappermap
+
+"""A collection of various simple widgets."""
+
+class Image(object):
+    """See https://develop.participatoryculture.org/index.php/WidgetAPI for a description of the API for this class."""
+    def __init__(self, path):
+        self._set_image(NSImage.alloc().initByReferencingFile_(
+            filename_to_unicode(path)))
+
+    def _set_image(self, nsimage):
+        self.nsimage = nsimage
+        self.width = self.nsimage.size().width
+        self.height = self.nsimage.size().height
+        if self.width * self.height == 0:
+            raise ValueError('Image has invalid size: (%d, %d)' % (
+                    self.width, self.height))
+
+    def resize(self, width, height):
+        return ResizedImage(self, width, height)
+
+    def crop_and_scale(self, src_x, src_y, src_width, src_height, dest_width,
+            dest_height):
+        if dest_width <= 0 or dest_height <= 0:
+            logging.stacktrace("invalid dest sizes: %s %s" % (dest_width,
+                    dest_height))
+            return TransformedImage(self.nsimage)
+
+        source_rect = NSMakeRect(src_x, src_y, src_width, src_height)
+        dest_rect = NSMakeRect(0, 0, dest_width, dest_height)
+
+        dest = NSImage.alloc().initWithSize_(NSSize(dest_width, dest_height))
+        dest.lockFocus()
+        try:
+            NSGraphicsContext.currentContext().setImageInterpolation_(
+                    NSImageInterpolationHigh)
+            self.nsimage.drawInRect_fromRect_operation_fraction_(dest_rect,
+                    source_rect, NSCompositeCopy, 1.0)
+        finally:
+            dest.unlockFocus()
+        return TransformedImage(dest)
+
+    def resize_for_space(self, width, height):
+        """Returns an image scaled to fit into the specified space at the
+        correct height/width ratio.
+        """
+        # this prevents division by 0.
+        if self.width == 0 and self.height == 0:
+            return self
+        elif self.width == 0:
+            ratio = height / self.height
+            return self.resize(self.width, ratio * self.height)
+        elif self.height == 0:
+            ratio = width / self.width
+            return self.resize(ratio * self.width, self.height)
+
+        ratio = min(width / self.width, height / self.height)
+        return self.resize(ratio * self.width, ratio * self.height)
+
+class ResizedImage(Image):
+    def __init__(self, image, width, height):
+        nsimage = image.nsimage.copy()
+        nsimage.setCacheMode_(NSImageCacheNever)
+        nsimage.setScalesWhenResized_(YES)
+        nsimage.setSize_(NSSize(width, height))
+        self._set_image(nsimage)
+
+class TransformedImage(Image):
+    def __init__(self, nsimage):
+        self._set_image(nsimage)
+
+class NSImageDisplay(NSView):
+    def init(self):
+        self = super(NSImageDisplay, self).init()
+        self.border = False
+        self.image = None
+        return self
+
+    def isFlipped(self):
+        return YES
+
+    def set_border(self, border):
+        self.border = border
+
+    def set_image(self, image):
+        self.image = image
+
+    def drawRect_(self, dest_rect):
+        if self.image is not None:
+            source_rect = self.calculateSourceRectFromDestRect_(dest_rect)
+            context = NSGraphicsContext.currentContext()
+            context.setShouldAntialias_(YES)
+            context.setImageInterpolation_(NSImageInterpolationHigh)
+            context.saveGraphicsState()
+            drawing.flip_context(self.bounds().size.height)
+            self.image.nsimage.drawInRect_fromRect_operation_fraction_(
+                dest_rect, source_rect, NSCompositeSourceOver, 1.0)
+            context.restoreGraphicsState()
+        if self.border:
+            context = drawing.DrawingContext(self, self.bounds(), dest_rect)
+            context.style = drawing.DrawingStyle()
+            context.set_line_width(1)
+            context.set_color((0, 0, 0))    # black
+            context.rectangle(0, 0, context.width, context.height)
+            context.stroke()
+
+    def calculateSourceRectFromDestRect_(self, dest_rect):
+        """Calulate where dest_rect maps to on our image.
+
+        This is tricky because our image might be scaled up, in which case
+        the rect from our image will be smaller than dest_rect.
+        """
+        view_size = self.frame().size
+        x_scale = float(self.image.width) / view_size.width
+        y_scale = float(self.image.height) / view_size.height
+
+        return NSMakeRect(dest_rect.origin.x * x_scale,
+                dest_rect.origin.y * y_scale,
+                dest_rect.size.width * x_scale,
+                dest_rect.size.height * y_scale)
+
+    # XXX FIXME: should track mouse movement - mouseDown is not the correct
+    # event.
+    def mouseDown_(self, event):
+        wrappermap.wrapper(self).emit('clicked')
+
+class ImageDisplay(Widget):
+    """See https://develop.participatoryculture.org/index.php/WidgetAPI for a description of the API for this class."""
+    def __init__(self, image=None):
+        Widget.__init__(self)
+        self.create_signal('clicked')
+        self.view = NSImageDisplay.alloc().init()
+        self.set_image(image)
+
+    def set_image(self, image):
+        self.image = image
+        if image:
+            image.nsimage.setCacheMode_(NSImageCacheNever)
+        self.view.set_image(image)
+        self.invalidate_size_request()
+
+    def set_border(self, border):
+        self.view.set_border(border)
+
+    def calc_size_request(self):
+        if self.image is not None:
+            return self.image.width, self.image.height
+        else:
+            return 0, 0
+
+class ClickableImageButton(ImageDisplay):
+    def __init__(self, image_path, max_width=None, max_height=None):
+        ImageDisplay.__init__(self)
+        self.set_border(True)
+        self.max_width = max_width
+        self.max_height = max_height
+        self.image = None
+        self._width, self._height = None, None
+        if image_path:
+            self.set_path(image_path)
+
+    def set_path(self, path):
+        image = Image(path)
+        if self.max_width:
+            image = image.resize_for_space(self.max_width, self.max_height)
+        super(ClickableImageButton, self).set_image(image)
+
+    def calc_size_request(self):
+        if self.max_width:
+            return self.max_width, self.max_height
+        else:
+            return ImageDisplay.calc_size_request(self)
+
+class MiroImageView(NSImageView):
+    def viewWillMoveToWindow_(self, aWindow):
+        self.setAnimates_(not aWindow == nil)
+
+class AnimatedImageDisplay(Widget):
+    def __init__(self, path):
+        Widget.__init__(self)
+        self.nsimage = NSImage.alloc().initByReferencingFile_(
+          filename_to_unicode(path))
+        self.view = MiroImageView.alloc().init()
+        self.view.setImage_(self.nsimage)
+        # enabled when viewWillMoveToWindow:aWindow invoked
+        self.view.setAnimates_(NO)
+
+    def calc_size_request(self):
+        return self.nsimage.size().width, self.nsimage.size().height
+
+class Label(Widget):
+    """See https://develop.participatoryculture.org/index.php/WidgetAPI for a description of the API for this class."""
+    def __init__(self, text="", wrap=False, color=None):
+        Widget.__init__(self)
+        self.view = NSTextField.alloc().init()
+        self.view.setEditable_(NO)
+        self.view.setBezeled_(NO)
+        self.view.setBordered_(NO)
+        self.view.setDrawsBackground_(NO)
+        self.wrap = wrap
+        self.bold = False
+        self.size = NSFont.systemFontSize()
+        self.sizer_cell = self.view.cell().copy()
+        self.set_font()
+        self.set_text(text)
+        self.__color = self.view.textColor()
+        if color is not None:
+            self.set_color(color)
+
+    def get_width(self):
+        return self.calc_size_request()[0]
+
+    def set_bold(self, bold):
+        self.bold = bold
+        self.set_font()
+
+    def set_size(self, size):
+        if size > 0:
+            self.size = NSFont.systemFontSize() * size
+        elif size == widgetconst.SIZE_SMALL:
+            self.size = NSFont.smallSystemFontSize()
+        elif size == widgetconst.SIZE_NORMAL:
+            self.size = NSFont.systemFontSize()
+        else:
+            raise ValueError("Unknown size constant: %s" % size)
+
+        self.set_font()
+
+    def set_color(self, color):
+        self.__color = self.make_color(color)
+
+        if self.view.isEnabled():
+            self.view.setTextColor_(self.__color)
+        else:
+            self.view.setTextColor_(self.__color.colorWithAlphaComponent_(0.5))
+
+    def set_background_color(self, color):
+        self.view.setBackgroundColor_(self.make_color(color))
+        self.view.setDrawsBackground_(YES)
+
+    def set_font(self):
+        if self.bold:
+            font = NSFont.boldSystemFontOfSize_(self.size)
+        else:
+            font= NSFont.systemFontOfSize_(self.size)
+        self.view.setFont_(font)
+        self.sizer_cell.setFont_(font)
+        self.invalidate_size_request()
+
+    def calc_size_request(self):
+        if (self.wrap and self.manual_size_request is not None and
+                self.manual_size_request[0] > 0):
+            wrap_width = self.manual_size_request[0]
+            size = self.sizer_cell.cellSizeForBounds_(NSMakeRect(0, 0,
+                wrap_width, 10000))
+        else:
+            size = self.sizer_cell.cellSize()
+        return math.ceil(size.width), math.ceil(size.height)
+
+    def baseline(self):
+        return -self.view.font().descender()
+
+    def set_text(self, text):
+        self.view.setStringValue_(text)
+        self.sizer_cell.setStringValue_(text)
+        self.invalidate_size_request()
+
+    def get_text(self):
+        val = self.view.stringValue()
+        if not val:
+            val = u''
+        return val
+
+    def set_selectable(self, val):
+        self.view.setSelectable_(val)
+
+    def set_alignment(self, alignment):
+        self.view.setAlignment_(alignment)
+
+    def get_alignment(self, alignment):
+        return self.view.alignment()
+
+    def set_wrap(self, wrap):
+        self.wrap = True
+        self.invalidate_size_request()
+
+    def enable(self):
+        Widget.enable(self)
+        self.view.setTextColor_(self.__color)
+        self.view.setEnabled_(True)
+
+    def disable(self):
+        Widget.disable(self)
+        self.view.setTextColor_(self.__color.colorWithAlphaComponent_(0.5))
+        self.view.setEnabled_(False)
+
+class SolidBackground(SimpleBin):
+    def __init__(self,  color=None):
+        SimpleBin.__init__(self)
+        self.view = FlippedView.alloc().init()
+        if color is not None:
+            self.set_background_color(color)
+
+    def set_background_color(self, color):
+        self.view.setBackgroundColor_(self.make_color(color))
+
+class ProgressBar(Widget):
+    def __init__(self):
+        Widget.__init__(self)
+        self.view = NSProgressIndicator.alloc().init()
+        self.view.setMaxValue_(1.0)
+        self.view.setIndeterminate_(False)
+
+    def calc_size_request(self):
+        return 20, 20
+
+    def set_progress(self, fraction):
+        self.view.setIndeterminate_(False)
+        self.view.setDoubleValue_(fraction)
+
+    def start_pulsing(self):
+        self.view.setIndeterminate_(True)
+        self.view.startAnimation_(nil)
+
+    def stop_pulsing(self):
+        self.view.stopAnimation_(nil)
+
+class HLine(Widget):
+    def __init__(self):
+        Widget.__init__(self)
+        self.view = NSBox.alloc().init()
+        self.view.setBoxType_(NSBoxSeparator)
+
+    def calc_size_request(self):
+        return self.view.frame().size.width, self.view.frame().size.height