ttk::treeview(n) Tk Themed Widget ttk::treeview(n)______________________________________________________________________________NAME
ttk::treeview - hierarchical multicolumn data display widget
SYNOPSIS
ttk::treeview pathname ?options?
_________________________________________________________________DESCRIPTION
The ttk::treeview widget displays a hierarchical collection of items.
Each item has a textual label, an optional image, and an optional list
of data values. The data values are displayed in successive columns
after the tree label.
The order in which data values are displayed may be controlled by set‐
ting the -displaycolumns widget option. The tree widget can also dis‐
play column headings. Columns may be accessed by number or by symbolic
names listed in the -columns widget option; see COLUMN IDENTIFIERS.
Each item is identified by a unique name. The widget will generate
item IDs if they are not supplied by the caller. There is a distin‐
guished root item, named {}. The root item itself is not displayed;
its children appear at the top level of the hierarchy.
Each item also has a list of tags, which can be used to associate event
bindings with individual items and control the appearance of the item.
Treeview widgets support horizontal and vertical scrolling with the
standard -[xy]scrollcommand options and [xy]view widget commands.
STANDARD OPTIONS-class-cursor-takefocus
-style-xscrollcommand-yscrollcommand
See the ttk_widget manual entry for details on the standard options.
WIDGET-SPECIFIC OPTIONS
[-columns columns] A list of column identifiers, specifying the number
of columns and their names. [-displaycolumns displayColumns] A list of
column identifiers (either symbolic names or integer indices) specify‐
ing which data columns are displayed and the order in which they
appear, or the string #all.
If set to #all (the default), all columns are shown in the order
given.
[-height height] Specifies the number of rows which should be visible.
Note: the requested width is determined from the sum of the column
widths. [-padding padding] Specifies the internal padding for the wid‐
get. The padding is a list of up to four length specifications; see
Ttk_GetPaddingFromObj() for details. [-selectmode selectMode] Controls
how the built-in class bindings manage the selection. One of extended,
browse, or none.
If set to extended (the default), multiple items may be
selected. If browse, only a single item will be selected at a
time. If none, the selection will not be changed.
Note that application code and tag bindings can set the selec‐
tion however they wish, regardless of the value of -selectmode.
[-show show] A list containing zero or more of the following values,
specifying which elements of the tree to display.
tree Display tree labels in column #0.
headings
Display the heading row.
The default is tree headings, i.e., show all elements.
NOTE: Column #0 always refers to the tree column, even if -show
tree is not specified.
WIDGET COMMAND
pathname bbox item ?column?
Returns the bounding box (relative to the treeview widget's win‐
dow) of the specified item in the form x y width height. If
column is specified, returns the bounding box of that cell. If
the item is not visible (i.e., if it is a descendant of a closed
item or is scrolled offscreen), returns the empty list.
pathname cget option
Returns the current value of the specified option; see ttk::wid‐
get(n).
pathname children item ?newchildren?
If newchildren is not specified, returns the list of children
belonging to item.
If newchildren is specified, replaces item's child list with
newchildren. Items in the old child list not present in the new
child list are detached from the tree. None of the items in
newchildren may be an ancestor of item.
pathname column column ?-option ?value -option value...?
Query or modify the options for the specified column. If no
-option is specified, returns a dictionary of option/value
pairs. If a single -option is specified, returns the value of
that option. Otherwise, the options are updated with the speci‐
fied values. The following options may be set on each column:
-id name
The column name. This is a read-only option. For exam‐
ple, [$pathname column #n -id] returns the data column
associated with display column #n.
-anchor
Specifies how the text in this column should be aligned
with respect to the cell. One of n, ne, e, se, s, sw, w,
nw, or center.
-minwidth
The minimum width of the column in pixels. The treeview
widget will not make the column any smaller than -min‐
width when the widget is resized or the user drags a col‐
umn separator.
-stretch
Specifies whether or not the column's width should be
adjusted when the widget is resized.
-width w
The width of the column in pixels. Default is something
reasonable, probably 200 or so.
Use pathname column #0 to configure the tree column.
pathname configure ?option? ?value option value ...?
Modify or query widget options; see ttk::widget(n).
pathname delete itemList
Deletes each of the items in itemList and all of their descen‐
dants. The root item may not be deleted. See also: detach.
pathname detach itemList
Unlinks all of the specified items in itemList from the tree.
The items and all of their descendants are still present and may
be reinserted at another point in the tree but will not be dis‐
played. The root item may not be detached. See also: delete.
pathname exists item
Returns 1 if the specified item is present in the tree, 0 other‐
wise.
pathname focus ?item?
If item is specified, sets the focus item to item. Otherwise,
returns the current focus item, or {} if there is none.
pathname heading column ?-option ?value -option value...?
Query or modify the heading options for the specified column.
Valid options are:
-text text
The text to display in the column heading.
-image imageName
Specifies an image to display to the right of the column
heading.
-anchor anchor
Specifies how the heading text should be aligned. One of
the standard Tk anchor values.
-command script
A script to evaluate when the heading label is pressed.
Use pathname heading #0 to configure the tree column heading.
pathname identify component x y
Returns a description of the specified component under the point
given by x and y, or the empty string if no such component is
present at that position. The following subcommands are sup‐
ported:
pathname identify row x y
Returns the item ID of the item at position y.
pathname identify column x y
Returns the data column identifier of the cell at posi‐
tion x. The tree column has ID #0.
See COLUMN IDENTIFIERS for a discussion of display columns and
data columns.
pathname index item
Returns the integer index of item within its parent's list of
children.
pathname insert parent index ?-id id? options...
Creates a new item. parent is the item ID of the parent item,
or the empty string {} to create a new top-level item. index is
an integer, or the value end, specifying where in the list of
parent's children to insert the new item. If index is less than
or equal to zero, the new node is inserted at the beginning; if
index is greater than or equal to the current number of chil‐
dren, it is inserted at the end. If -id is specified, it is
used as the item identifier; id must not already exist in the
tree. Otherwise, a new unique identifier is generated.
pathname insert returns the item identifier of the newly created
item. See ITEM OPTIONS for the list of available options.
pathname instate statespec ?script?
Test the widget state; see ttk::widget(n).
pathname item item ?-option ?value -option value...?
Query or modify the options for the specified item. If no
-option is specified, returns a dictionary of option/value
pairs. If a single -option is specified, returns the value of
that option. Otherwise, the item's options are updated with the
specified values. See ITEM OPTIONS for the list of available
options.
pathname move item parent index
Moves item to position index in parent's list of children. It
is illegal to move an item under one of its descendants.
If index is less than or equal to zero, item is moved to the
beginning; if greater than or equal to the number of children,
it is moved to the end.
pathname next item
Returns the identifier of item's next sibling, or {} if item is
the last child of its parent.
pathname parent item
Returns the ID of the parent of item, or {} if item is at the
top level of the hierarchy.
pathname prev item
Returns the identifier of item's previous sibling, or {} if item
is the first child of its parent.
pathname see item
Ensure that item is visible: sets all of item's ancestors to
-open true, and scrolls the widget if necessary so that item is
within the visible portion of the tree.
pathname selection ?selop itemList?
If selop is not specified, returns the list of selected items.
Otherwise, selop is one of the following:
pathname selection set itemList
itemList becomes the new selection.
pathname selection add itemList
Add itemList to the selection
pathname selection remove itemList
Remove itemList from the selection
pathname selection toggle itemList
Toggle the selection state of each item in itemList.
pathname set item ?column? ?value?
With one argument, returns a dictionary of column/value pairs
for the specified item. With two arguments, returns the current
value of the specified column. With three arguments, sets the
value of column column in item item to the specified value. See
also COLUMN IDENTIFIERS.
pathname state ?stateSpec?
Modify or query the widget state; see ttk::widget(n).
pathName tag args...
pathName tag bind tagName ?sequence? ?script?
Add a Tk binding script for the event sequence sequence
to the tag tagName. When an X event is delivered to an
item, binding scripts for each of the item's -tags are
evaluated in order as per bindtags(n).
<KeyPress>, <KeyRelease>, and virtual events are sent to
the focus item. <ButtonPress>, <ButtonRelease>, and
<Motion> events are sent to the item under the mouse
pointer. No other event types are supported.
The binding script undergoes %-substitutions before eval‐
uation; see bind(n) for details.
pathName tag configure tagName ?option? ?value option value...?
Query or modify the options for the specified tagName.
If one or more option/value pairs are specified, sets the
value of those options for the specified tag. If a sin‐
gle option is specified, returns the value of that option
(or the empty string if the option has not been specified
for tagName). With no additional arguments, returns a
dictionary of the option settings for tagName. See TAG
OPTIONS for the list of available options.
pathName xview args
Standard command for horizontal scrolling; see widget(n).
pathName yview args
Standard command for vertical scrolling; see ttk::widget(n).
ITEM OPTIONS
The following item options may be specified for items in the insert and
item widget commands. [-text text] The textual label to display for
the item. [-image image] A Tk image, displayed to the left of the
label. [-values values] The list of values associated with the item.
Each item should have the same number of values as the -columns
widget option. If there are fewer values than columns, the
remaining values are assumed empty. If there are more values
than columns, the extra values are ignored.
[-open open] A boolean value indicating whether the item's children
should be displayed (-open true) or hidden (-open false). [-tags tags]
A list of tags associated with this item.
TAG OPTIONS
The following options may be specified on tags:
-foreground
Specifies the text foreground color.
-background
Specifies the cell or item background color.
-font Specifies the font to use when drawing text.
-image Specifies the item image, in case the item's -image option is
empty.
(@@@ TODO: sort out order of precedence for options)
COLUMN IDENTIFIERS
Column identifiers take any of the following forms:
· A symbolic name from the list of -columns.
· An integer n, specifying the nth data column.
· A string of the form #n, where n is an integer, specifying the
nth display column.
NOTE: Item -values may be displayed in a different order than the order
in which they are stored.
NOTE: Column #0 always refers to the tree column, even if -show tree is
not specified.
A data column number is an index into an item's -values list; a display
column number is the column number in the tree where the values are
displayed. Tree labels are displayed in column #0. If -displaycolumns
is not set, then data column n is displayed in display column #n+1.
Again, column #0 always refers to the tree column.
VIRTUAL EVENTS
The treeview widget generates the following virtual events.
<<TreeviewSelect>>
Generated whenever the selection changes.
<<TreeviewOpen>>
Generated just before setting the focus item to -open true.
<<TreeviewClose>>
Generated just after setting the focus item to -open false.
The focus and selection widget commands can be used to determine the
affected item or items.
SEE ALSOttk::widget(n), listbox(n), image(n), bind(n)Tk 8.5 ttk::treeview(n)
