Package nltk :: Package draw :: Module tree :: Class TreeSegmentWidget

Class TreeSegmentWidget

  object --+    
           |    
CanvasWidget --+
               |
              TreeSegmentWidget

A canvas widget that displays a single segment of a hierarchical tree. Each TreeSegmentWidget connects a single node widget to a sequence of zero or more subtree widgets. By default, the bottom of the node is connected to the top of each subtree by a single line. However, if the roof attribute is set, then a single triangular "roof" will connect the node to all of its children.

Attributes:

roof: What sort of connection to draw between the node and its subtrees. If roof is true, draw a single triangular "roof" over the subtrees. If roof is false, draw a line between each subtree and the node. Default value is false.
xspace: The amount of horizontal space to leave between subtrees when managing this widget. Default value is 10.
yspace: The amount of space to place between the node and its children when managing this widget. Default value is 15.
color: The color of the lines connecting the node to its subtrees; and of the outline of the triangular roof. Default value is '#006060'.
fill: The fill color for the triangular roof. Default value is '' (no fill).
width: The width of the lines connecting the node to its subtrees; and of the outline of the triangular roof. Default value is 1.
orientation: Determines whether the tree branches downwards or rightwards. Possible values are 'horizontal' and 'vertical'. The default value is 'vertical' (i.e., branch downwards).
draggable: whether the widget can be dragged by the user.

The following attributes may also be added in the near future:

linen_color: The color of the line connecting the node to its nth subtree.
linen_color: The width of the line connecting the node to its nth subtree.
linen_color: The dash pattern of the line connecting the node to its nth subtree.

Instance Methods

[hide private]

__init__(self, canvas, node, subtrees, **attribs)
Create a new canvas widget.

source code

None

__setitem__(self, attr, value)
Set the value of the attribute attr to value. source code

(any)

__getitem__(self, attr)
Returns: the value of the attribute attr. source code

node(self)

source code

subtrees(self)

source code

set_node(self, node)
Set the node to node. source code

replace_child(self, oldchild, newchild)
Replace the child oldchild with newchild. source code

remove_child(self, child)

source code

insert_child(self, index, child)

source code

list of int

_tags(self)
Returns: a list of canvas tags for all graphical elements managed by this canvas widget, not including graphical elements managed by its child widgets.

source code

_subtree_top(self, child)

source code

_node_bottom(self)

source code

None

_update(self, child)
Update this canvas widget in response to a change in one of its children.

source code

_maintain_order(self, child)

source code

_maintain_order_vertical(self, child)

source code

_maintain_order_horizontal(self, child)

source code

_manage_horizontal(self)

source code

_manage_vertical(self)

source code

None

_manage(self)
Arrange the child widgets of this canvas widget.

source code

string

__repr__(self)
Returns: a string representation of this canvas widget.

source code

Inherited from CanvasWidget: bbox, bind_click, bind_drag, canvas, child_widgets, destroy, height, hidden, hide, manage, move, moveto, parent, show, tags, unbind_click, unbind_drag, update, width

Inherited from CanvasWidget (private): _add_child_widget, _remove_child_widget

Inherited from object: __delattr__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __setattr__, __str__

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, canvas, node, subtrees, **attribs)
(Constructor)

source code

Create a new canvas widget. This constructor should only be called by subclass constructors; and it should be called only after the subclass has constructed all graphical canvas objects and registered all child widgets.

Parameters:

canvas - This canvas widget's canvas.
parent - This canvas widget's hierarchical parent.
attribs - The new canvas widget's attributes.
node ()
subtrees (list of CanvasWidgetI)

Overrides: CanvasWidget.__init__

setitem(self, attr, value)
(Index assignment operator)

source code

Set the value of the attribute attr to value. See the class documentation for a list of attributes supported by this canvas widget.

Returns: None
Overrides: CanvasWidget.__setitem__: (inherited documentation)

getitem(self, attr)
(Indexing operator)

source code

Returns: (any): the value of the attribute attr. See the class documentation for a list of attributes supported by this canvas widget.
Overrides: CanvasWidget.__getitem__: (inherited documentation)

_tags(self)

source code

Returns: list of int: a list of canvas tags for all graphical elements managed by this canvas widget, not including graphical elements managed by its child widgets.
Overrides: CanvasWidget._tags: (inherited documentation)

_update(self, child)

source code

Update this canvas widget in response to a change in one of its children.

Parameters:

child - The child that changed.

Returns: None

Overrides: CanvasWidget._update

(inherited documentation)

_manage(self)

source code

Arrange the child widgets of this canvas widget. This method is called when the canvas widget is initially created. It is also called if the user calls the manage method on this canvas widget or any of its ancestors.

Returns: None
Overrides: CanvasWidget._manage: (inherited documentation)

repr(self)
(Representation operator)

source code

repr(x)

Returns: string: a string representation of this canvas widget.
Overrides: CanvasWidget.__repr__: (inherited documentation)

Class TreeSegmentWidget

__init__(self, canvas, node, subtrees, **attribs) (Constructor)

__setitem__(self, attr, value) (Index assignment operator)

__getitem__(self, attr) (Indexing operator)

_tags(self)

_update(self, child)

_manage(self)

__repr__(self) (Representation operator)

init(self, canvas, node, subtrees, **attribs)
(Constructor)

setitem(self, attr, value)
(Index assignment operator)

getitem(self, attr)
(Indexing operator)

repr(self)
(Representation operator)