Code example to reproduce bokeh layout problem

addingplots.py

from numpy import array, random
from pandas import DataFrame
from bokeh.plotting import figure, curdoc
from bokeh.layouts import row, column, widgetbox
from bokeh.models.widgets import Button


def draw_plot(df):
    f= figure(tools="save", background_fill_color="#EFE8E2", 
                          title="", width=500, height=500)
    xcol = df.columns[random.randint(len(df.columns))]
    ycol = df.columns[random.randint(len(df.columns))]
    f.circle(df[xcol], df[ycol])
    f.xaxis.axis_label = xcol
    f.yaxis.axis_label = ycol
    return f

def add_to_axis(axis='x', figure_width=500):
    if axis.lower() == 'y':
        layout_y.children.append(draw_plot(data))
        layout_y.width += figure_width
        layout_x.width += figure_width
        layout.width += figure_width
    elif axis.lower() == 'x':
        layout_x.children.append(row(draw_plot(data)))
        layout_x.height += figure_width
        layout.height += figure_width

def add_below():
    add_to_axis('x')

def add_across():
    add_to_axis('y')

add_below_button = Button(label='add below', width=150)
add_across_button = Button(label='add across', width=150)

add_below_button.on_click(add_below)
add_across_button.on_click(add_across)

arra = array([ random.random() for i in range(10) ])
arrb = array([ random.random() for i in range(10) ])
arrc = array([ random.random() for i in range(10) ])
arrd = array([ random.random() for i in range(10) ])
datadict = { 'A': arra,
             'B': arrb,
             'C': arrc,
             'D': arrd }

data = DataFrame(datadict)
fig  = draw_plot(data)
wbox = widgetbox([add_below_button, add_across_button], width=200)
layout_y = row(fig, width=600)
layout_x = column(layout_y, width=600)

layout = row(wbox, layout_x, width=wbox.width+layout_y.width, height=layout_x.height)

curdoc().add_root(layout)
curdoc().title = 'Layout Buttons'