# p.g.PlusMinusBox(planes.Plane) : class documentation

Part of planes.gui View In Hierarchy

Known subclasses: planes.gui.lmr.LMRPlusMinusBox

    This class implements a TextBox with plus and minus buttons attached, to change a numerical value.
    The value is accessible as PlusMinusBox.textbox.text

Method | __init__ | `Initialise. charwidth is the width of the text field in characters. value, if given, is the initial numerical value.`
Method | minus_callback | `Callback when minus is clicked.`
Method | plus_callback | `Callback when plus is clicked.`

Inherited from Plane:

Method | sub | `Remove the Plane given from its current parent and add it as a subplane of this Plane.`
Method | remove | `Remove subplane by name or Plane instance.`
Method | remove_all | `Convenience method to call Plane.remove() for all subplanes.`
Method | __getattr__ | `Access subplanes as attributes.`
Method | render | `Draw a composite surface of this plane and all subplanes, in order of their addition.`
Method | get_plane_at | `Return the (sub)plane and the succeeding parent coordinates at the given coordinates. Subplanes are tested in reverse order of their addition (i.e. latest first).`
Method | update | No summary
Method | clicked | `Called when there is a MOUSEDOWN event on this plane. If click callbacks are set, the appropriate one is called with this Plane as argument.`
Method | dropped_upon | `If a plane is dropped on top of this one, call dropped_upon_callback() and conditionally grab it.`
Method | destroy | `Remove this Plane from the parent plane, remove all subplanes and delete all pygame Surfaces.`
Method | sync | `Save the Plane given as master Plane and the position offset to that Plane for position synchronisation in Plane.update().`
Method | unsync | `Remove the position synchronisation to the sync master Plane.`
Method | mouseover_callback | `Callback function when the mouse cursor moves over this plane. The default implementation sets Plan.mouseover to True when Plane.highlight is set.`
Method | mouseout_callback | `Callback function when the mouse cursor has left this plane. The default implementation sets Plan.mouseover to False.`
Method | __repr__ | `Readable string representation.`

def __init__(self, name, charwidth, value=0):
overrides planes.Plane.__init__
overridden in planes.gui.lmr.LMRPlusMinusBox

    Initialise.
    charwidth is the width of the text field in characters.
    value, if given, is the initial numerical value.

def minus_callback(self, Plane):

    Callback when minus is clicked.

def plus_callback(self, Plane):

    Callback when plus is clicked.