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
setting the -displaycolumns widget option. The tree widget can also
display 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
distinguished 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
-padding
See the ttk_widget manual entry for details on the standard options.
WIDGET-SPECIFIC OPTIONS
Command-Line Name:-columns
Database Name: columns
Database Class: Columns
A list of column identifiers, specifying the number of columns
and their names.
Command-Line Name:-displaycolumns
Database Name: displayColumns
Database Class: DisplayColumns
A list of column identifiers (either symbolic names or integer
indices) specifying 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.
Command-Line Name:-height
Database Name: height
Database Class: Height
Specifies the number of rows which should be visible. Note: the
requested width is determined from the sum of the column widths.
Command-Line Name:-selectmode
Database Name: selectMode
Database Class: 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
selection however they wish, regardless of the value of
-selectmode.
Command-Line Name:-show
Database Name: show
Database Class: 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
window) 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. If the
element is partially visible, the result gives the full area of
the element, including any parts that are not visible.
pathname cget option
Returns the current value of the specified option; see
ttk::widget(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
specified values. The following options may be set on each
column:
-id name
The column name. This is a read-only option. For
example, [$pathname column #n -id] returns the data
column associated with display column #n.
-anchor anchor
Specifies how the text in this column should be aligned
with respect to the cell. Anchor is one of n, ne, e, se,
s, sw, w, nw, or center.
-minwidth minwidth
The minimum width of the column in pixels. The treeview
widget will not make the column any smaller than
-minwidth when the widget is resized or the user drags a
column separator. Default is 20 pixels.
-stretch boolean
Specifies whether or not the column width should be
adjusted when the widget is resized or the user drags a
column separator. Boolean may have any of the forms
accepted by Tcl_GetBoolean. By default columns are
stretchable.
-width width
The width of the column in pixels. Default is 200
pixels. The specified column width may be changed by Tk
in order to honor -stretch and/or -minwidth, or when the
widget is resized or the user drags a column separator.
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
descendants. 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 with the move
operation, but will not be displayed until that is done. 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
otherwise.
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 values x and y may have any of
the forms acceptable to Tk_GetPixels. The following subcommands
are supported:
pathname identify region x y
Returns one of:
heading
Tree heading area; use [pathname identify column x
y] to determine the heading number.
separator
Space between two column headings; [pathname
identify column x y] will return the display
column identifier of the heading to left of the
separator.
tree The tree area.
cell A data cell.
pathname identify item x y Returns the item ID of the item at
position y.
pathname identify column x y
Returns the display column identifier of the cell at
position x. The tree column has ID #0.
pathname identify element x y
The element at position x,y.
pathname identify row x y
Obsolescent synonym for pathname identify item.
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
children, 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
evaluation; 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
single 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 tag has tagName ?item?
If item is specified, returns 1 or 0 depending on whether
the specified item has the named tag. Otherwise, returns
a list of all items which have the specified tag.
pathName tag names
Returns a list of all tags used by the widget.
pathName tag add tag items
Adds the specified tag to each of the listed items. If
tag is already present for a particular item, then the
-tags for that item are unchanged.
pathName tag remove tag ?items?
Removes the specified tag from each of the listed items.
If items is omitted, removes tag from each item in the
tree. If tag is not present for a particular item, then
the -tags for that item are unchanged.
The treeview widget also supports the following generic ttk::widget
widget subcommands (see ttk::widget(n) for details):
xview yview
ITEM OPTIONS
The following item options may be specified for items in the insert and
item widget commands.
Command-Line Name:-text
Database Name: text
Database Class: Text
The textual label to display for the item.
Command-Line Name:-image
Database Name: image
Database Class: Image
A Tk image, displayed to the left of the label.
Command-Line Name:-values
Database Name: values
Database Class: 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.
Command-Line Name:-open
Database Name: open
Database Class: Open
A boolean value indicating whether the item's children should be
displayed (-open true) or hidden (-open false).
Command-Line Name:-tags
Database Name: tags
Database Class: 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.
Tag priority is decided by the creation order: tags created first
receive higher priority.
COLUMN IDENTIFIERS
Column identifiers take any of the following forms:
o A symbolic name from the list of -columns.
o An integer n, specifying the nth data column.
o 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. It might also be
generated when selection is affected but not actually changed.
Further, multiple selection changes could happen before events
can be processed leading to multiple events with the same
visible selection.
<<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.
STYLING OPTIONS
The class name for a ttk::treeview is Treeview. The treeview header
class name is Heading. The treeview item class name is Item. The
treeview cell class name is Cell.
Dynamic states: disabled, selected.
Treeview styling options configurable with ttk::style are:
-background color
-fieldbackground color
-font font
-foreground color
-indent amount
Specifies how far items are indented from their parents.
Defaults to 20 pixels. The value may have any of the forms
acceptable to Tk_GetPixels.
-rowheight amount
This is the standard height for an item. Defaults to 20 pixels.
The value may have any of the forms acceptable to Tk_GetPixels.
If -rowheight is not set by the style, it is set by measuring an
item and a cell layout with the style's settings. This thus
picks up the font and any focus ring or padding from the theme's
layout. The -rowheight may need to be set to make sure that a
row is large enough to contain any images.
To adjust the -rowheight for the Treeview style, use the
following code after tk scaling has been applied. Note that
even if you do not support or change tk scaling in your program,
your users may have it set in their .wishrc.
ttk::style configure Treeview \
-rowheight [expr {[font metrics font -linespace] + 2}]
Heading styling options configurable with ttk::style are:
-background color
-font font
-relief relief
Item styling options configurable with ttk::style are:
-foreground color
-indicatormargins padding
-indicatorsize amount
-padding padding
Cell styling options configurable with ttk::style are:
-padding padding
Some options are only available for specific themes.
See the ttk::style manual page for information on how to configure ttk
styles.
SEE ALSO
ttk_widget(n), listbox(n), image(n), bind(n)
Tk 8.5 ttk::treeview(n)
tk 8.6.15 - Generated Thu Dec 5 07:42:13 CST 2024