Package nltk :: Package draw :: Module tree :: Class TreeWidget

Class TreeWidget

  object --+    
           |    
CanvasWidget --+
               |
              TreeWidget

A canvas widget that displays a single Tree. TreeWidget manages a group of TreeSegmentWidgets that are used to display a Tree.

Attributes:

node_attr: Sets the attribute attr on all of the node widgets for this TreeWidget.
node_attr: Sets the attribute attr on all of the leaf widgets for this TreeWidget.
loc_attr: Sets the attribute attr on all of the location widgets for this TreeWidget (if it was built from a Tree). Note that location widgets are TextWidgets.
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.
line_color: The color of the lines connecting each expanded node to its subtrees.
roof_color: The color of the outline of the triangular roof for collapsed trees.
roof_fill: The fill color for the triangular roof for collapsed trees.
width
orientation: Determines whether the tree branches downwards or rightwards. Possible values are 'horizontal' and 'vertical'. The default value is 'vertical' (i.e., branch downwards).
shapeable: whether the subtrees can be independantly dragged by the user. THIS property simply sets the DRAGGABLE property on all of the TreeWidget's tree segments.
draggable: whether the widget can be dragged by the user.

Instance Methods

[hide private]

__init__(self, canvas, t, make_node=<class 'nltk.draw.TextWidget'>, make_leaf=<class 'nltk.draw.TextWidget'>, **attribs)
Create a new canvas widget.

source code

expanded_tree(self, *path_to_tree)
Return the TreeSegmentWidget for the specified subtree. source code

collapsed_tree(self, *path_to_tree)
Return the TreeSegmentWidget for the specified subtree. source code

bind_click_trees(self, callback, button=1)
Add a binding to all tree segments.

source code

bind_drag_trees(self, callback, button=1)
Add a binding to all tree segments.

source code

bind_click_leaves(self, callback, button=1)
Add a binding to all leaves.

source code

bind_drag_leaves(self, callback, button=1)
Add a binding to all leaves.

source code

bind_click_nodes(self, callback, button=1)
Add a binding to all nodes.

source code

bind_drag_nodes(self, callback, button=1)
Add a binding to all nodes.

source code

_make_collapsed_trees(self, canvas, t, key)

source code

_make_expanded_tree(self, canvas, t, key)

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

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

None

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

source code

toggle_collapsed(self, treeseg)
Collapse/expand a tree.

source code

Inherited from CanvasWidget: __repr__, 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, _update

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, t, make_node=<class 'nltk.draw.TextWidget'>, make_leaf=<class 'nltk.draw.TextWidget'>, **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.

Overrides: CanvasWidget.__init__

(inherited documentation)

expanded_tree(self, *path_to_tree)

source code

Return the TreeSegmentWidget for the specified subtree.

Parameters:

path_to_tree - A list of indices i1, i2, ..., in, where the desired widget is the widget corresponding to tree.children()[i1].children()[i2]....children()[in]. For the root, the path is ().

collapsed_tree(self, *path_to_tree)

source code

Return the TreeSegmentWidget for the specified subtree.

Parameters:

path_to_tree - A list of indices i1, i2, ..., in, where the desired widget is the widget corresponding to tree.children()[i1].children()[i2]....children()[in]. For the root, the path is ().

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)

_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)

Class TreeWidget

__init__(self, canvas, t, make_node=<class 'nltk.draw.TextWidget'>, make_leaf=<class 'nltk.draw.TextWidget'>, **attribs) (Constructor)

expanded_tree(self, *path_to_tree)

collapsed_tree(self, *path_to_tree)

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

__getitem__(self, attr) (Indexing operator)

_tags(self)

_manage(self)

init(self, canvas, t, make_node=<class 'nltk.draw.TextWidget'>, make_leaf=<class 'nltk.draw.TextWidget'>, **attribs)
(Constructor)

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

getitem(self, attr)
(Indexing operator)