are now local to the function that uses them (e.g. matplotlib,
numpy). GUI related functionality is now loaded by the application code
explicitly calling the props.initGUI function, so that wx is not
implicitly imported.

When a widget built by the build module is destroyed, all references
to the callback functions/GUI objecst are explicitly cleared, as
circular references were preventing automatic garbage collection.

2. BitmapRadioBox allows items to be enabled/disabled.

3. Choice widget handlers enable/disable bitmapradio items as necessary

ColourPickerCtrl doesn't get sized properly. Boolean properties can be
displayed with a  (custom) bitmap toggle button.

Bounds labels can be set in Widget objects.

centred.

keys (PropertyValueLists). I learnt a new and shitty thing today - if
you have two objects, and o1 == o2, then hash(o1) has to be equal to
hash(o2).

conventions. BitmapRadioBox now accepts bitmaps, rather than file names.

radio bitmap buttons.

wx.Button/ToggleButtons. But there's a stupid OSX quirk that I can't
find a workaround for.

said default labels are forced to be strings.

conversion made a bit smarter, and case insensitive.

colour map keys and colour map names.

values which will be accepted for assignment.

determine whether wheel rotation is horizontal/vertical.

parameters (arguments destined for other property types)

disabled by default)

FloatSpinCtrl text box expands to fit space.

Number widget build code was configuring int slider for float, and vice
versa.

widgets._propBind was not de-registering attribute listener on widget
destroy.

Build.py window destroy handler was not calling ev.Skip, causing other
destroy handlers to be ignored.

control which can be either integer or float). Ugly, as there is much
code duplication with the FloatSpinCtrl ...

SpinCtrl, and SpinCtrlDouble controls, so have rolled my own float spin
control. Will possibly merge this with the FloatSlider.

with wx.lib.agw.floatspin.FloatSpin.

HasProperties instances, by setting the 'dependencies' attribute.

bounds for all axes.

for low/high value change callbacks, so updates were being dropped by
callqueue (which skips duplicate listener callbacks based on the
listener name).

that have been GC'd - using weakrefs).