Are the UI controls supposed to work out of the box?

[Tabam]

Total beginner, I've worked through some examples and I'm trying to get ui.DockPanel to load, but all I get is white space under the formatted text:http://pyjs.org/examples/Showcase.html#test

Shouldn't I at least see labels?  Here is the source code:

from pyjamas.ui.SimplePanel import SimplePanel
from pyjamas.ui.DockPanel import DockPanel
from pyjamas.ui.Label import Label
from pyjamas.ui import HasAlignment

class DockPanelDemo(SimplePanel):
    def __init__(self):
        SimplePanel.__init__(self)

        panel = DockPanel(BorderWidth=1, Padding=8,
                          HorizontalAlignment=HasAlignment.ALIGN_CENTER,
                          VerticalAlignment=HasAlignment.ALIGN_MIDDLE)

        north  = Label("North")
        west   = Label("West")
        center = Label("Center")
        east   = Label("East")
        south  = Label("South")

        panel.add(north,  DockPanel.NORTH)
        panel.add(west,   DockPanel.WEST)
        panel.add(center, DockPanel.CENTER)
        panel.add(east,   DockPanel.EAST)
        panel.add(south,  DockPanel.SOUTH)

        panel.setCellHeight(center, "200px")
        panel.setCellWidth(center, "400px")

        self.add(panel)

[Greg Warner]

I believe you need to instantiate an instance of your DockPanelDemo and add it to a RootPanel.  See: https://github.com/pyjs/pyjs/blob/master/examples/helloworld/Hello.py

Greg

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