Provided by: blt-dev_2.5.3+dfsg-4.1build2_amd64 
NAME
treeview - Create and manipulate hierarchical table widgets
_________________________________________________________________
SYNOPSIS
treeview pathName ?options?
DESCRIPTION
The treeview widget displays a tree of data. It replaces both the hiertable and hierbox
widgets. The treeview is 100% syntax compatible with the hiertable widget. The hiertable
command is retained for sake of script-level compatibility. This widget obsoletes the
hierbox widget. It does everything the old hierbox widget did, but also provides data
sharing (via tree data objects) and the ability to tag nodes.
INTRODUCTION
The treeview widget displays hierarchical data. Data is represented as nodes in a
general-ordered tree. Each node may have sub-nodes and these nodes can in turn has their
own children.
A node is displayed as a row entry in the widget. Each entry has a text label and icon.
When a node has children, its entry is drawn with a small button to the left of the label.
Clicking the mouse over this button opens or closes the node. When a node is open, its
children are exposed. When it is closed, the children and their descedants are hidden.
The button is normally a + or - symbol (ala Windows Explorer), but can be replaced with a
pair of Tk images (open and closed images).
If the node has data associated with it, they can be displayed in columns running
vertically on either side the tree. You can control the color, font, etc of each entry.
Any entry label or data field can be edited in-place.
TREE DATA OBJECT
The tree is not stored inside the widget but in a tree data object (see the tree command
for a further explanation). Tree data objects can be shared among different clients, such
as a treeview widget or the tree command. You can walk the tree and manage its data with
the tree command tree, while displaying it with the treeview widget. Whenever the tree is
updated, the treeview widget is automatically redrawn.
By default, the treeview widget creates its own tree object. The tree initially contains
just a root node. But you can also display trees created by the tree command using the
-tree configuration option. Treeview widgets can share the same tree object, possibly
displaying different views of the same data.
A tree object has both a Tcl and C API. You can insert or delete nodes using treeview
widget or tree command operations, but also from C code. For example, you can load the
tree from your C code while still managing and displaying the tree from Tcl. The widget is
automatically notified whenever the tree is modified via C or Tcl.
SYNTAX
treeview pathName ?option value?... The treeview command creates a new window pathName
and makes it into a treeview widget. At the time this command is invoked, there must not
exist a window named pathName, but pathName's parent must exist. Additional options may
be specified on the command line or in the option database to configure aspects of the
widget such as its colors and font. See the configure operation below for the exact
details about what option and value pairs are valid.
If successful, treeview returns the path name of the widget. It also creates a new Tcl
command by the same name. You can use this command to invoke various operations that
query or modify the widget. The general form is: pathName operation ?arg?... Both
operation and its arguments determine the exact behavior of the command. The operations
available are described in the TREEVIEW OPERATIONS section.
IDS AND TAGS
Nodes can be inserted into a tree using the treeview widget
blt::treeview .t
set node [.t insert end root "one"]
or tree command.
set tree [blt::tree create]
set node [$tree insert root "one"]
In both cases, a number identifying the node is returned (the value of $node). This
serial number or id uniquely identifies the node. Please note that you can't infer a
location or position of a node from its id. The only exception is that the root node is
always id 0. Since nodes may have the same labels or be moved within the tree, ids provide
an convenient way to identify nodes. If a tree is shared, the ids will be the same
regardless if you are using by the treeview widget or the tree command. Ids are recycled
when the node deleted.
A node may also have any number of tags associated with it. A tag is just a string of
characters, and it may take any form except that of an integer. For example, "x123" is
valid, but "123" isn't. The same tag may be associated with many different nodes. This
is typically done to associate a group of nodes. Many operations in the treeview widget
take either node ids or tag names as arguments. Using a tag says to apply the operation
to all nodes with that tag.
The tag all is implicitly associated with every node in the tree. It may be used to
invoke operations on all the nodes in the tree.
Tags may be shared, just like trees, between clients. For example, you can use the tags
created by the tree command with treeview widgets.
SPECIAL NODE IDS
There are also several special non-numeric ids. Special ids differ from tags in that they
are always translated to their numeric equivalent. They also take precedence over tags.
For example, you can't use a tag name that is a special id. These ids are specific to the
treeview widget.
active The node where the mouse pointer is currently located. When a node is
active, it is drawn using its active icon (see the -activeicon option).
The active id is changed automatically by moving the mouse pointer over
another node or by using the entry activate operation. Note that there can
be only one active node at a time.
anchor The node representing the fixed end of the current selection. The anchor
is set by the selection anchor operation.
current The node where the mouse pointer is currently located. But unlike active,
this id changes while the selection is dragged. It is used to determine
the current node during button drags.
down The next open node from the current focus. The down of the last open node
is the same.
end The last open node (in depth-first order) on the tree.
focus The node that currently has focus. When a node has focus, it receives key
events. To indicate focus, the node is drawn with a dotted line around its
label. You can change the focus using the focus operation.
last The last open node from the current focus. But unlike up, when the focus is
at root, last wraps around to the last open node in the tree.
mark The node representing the non-fixed end of the current selection. The mark
is set by the selection mark operation.
next The next open node from the current focus. But unlike down, when the focus
is on last open node, next wraps around to the root node.
nextsibling The next sibling from the node with the current focus. If the node is
already the last sibling then it is the nextsibling.
parent The parent of the node with the current focus. The parent of the root is
also the root.
prevsibling The previous sibling from the node with the current focus. If the node is
already the first sibling then it is the prevsibling.
root The root node. You can also use id 0 to indicate the root.
up The last open node (in depth-first order) from the current focus. The up of
the root node (i.e. the root has focus) is also the root.
view.top First node that's current visible in the widget.
view.bottom Last node that's current visible in the widget.
path Absolute path of a node. Path names refer to the node name, not their
entry labels. Paths don't have to start with a separator (see the
-separator configuration option), but component names must be separated by
the designated separator.
@x,y Indicates the node that covers the point in the treeview window specified
by x and y (in pixel coordinates). If no part of the entryd covers that
point, then the closest node to that point is used.
A node may be specified as an id or tag. If the specifier is an integer then it is assumed
to refer to the single node with that id. If the specifier is not an integer, it's
checked to see if it's a special id (such as focus). Otherwise, it's assumed to be tag.
Some operations only operate on a single node at a time; if a tag refers to more than one
node, then an error is generated.
DATA FIELDS
A node in the tree can have data fields. A data field is a name-value pair, used to
represent arbitrary data in the node. Nodes can contain different fields (they aren't
required to contain the same fields). You can optionally display these fields in the
treeview widget in columns running on either side of the displayed tree. A node's value
for the field is drawn in the column along side its node in the hierarchy. Any node that
doesn't have a specific field is left blank. Columns can be interactively resized,
hidden, or, moved.
ENTRY BINDINGS
You can bind Tcl commands to be invoked when events occur on nodes (much like Tk canvas
items). You can bind a node using its id or its bindtags. Bindtags are simply names that
associate a binding with one or more nodes. There is a built-in tag all that all node
entries automatically have.
TREEVIEW OPERATIONS
The treeview operations are the invoked by specifying the widget's pathname, the
operation, and any arguments that pertain to that operation. The general form is:
pathName operation ?arg arg ...?
Operation and the args determine the exact behavior of the command. The following
operation are available for treeview widgets:
pathName bbox ?-screen? tagOrId...
Returns a list of 4 numbers, representing a bounding box of around the specified
entries. The entries is given by one or more tagOrId arguments. If the -screen
flag is given, then the x-y coordinates of the bounding box are returned as screen
coordinates, not virtual coordinates. Virtual coordinates start from 0 from the
root node. The returned list contains the following values.
x X-coordinate of the upper-left corner of the bounding box.
y Y-coordinate of the upper-left corner of the bounding box.
width Width of the bounding box.
height Height of the bounding box.
pathName bind tagName ?sequence command?
Associates command with tagName such that whenever the event sequence given by
sequence occurs for a node with this tag, command will be invoked. The syntax is
similar to the bind command except that it operates on treeview entries, rather
than widgets. See the bind manual entry for complete details on sequence and the
substitutions performed on command before invoking it.
If all arguments are specified then a new binding is created, replacing any
existing binding for the same sequence and tagName. If the first character of
command is + then command augments an existing binding rather than replacing it.
If no command argument is provided then the command currently associated with
tagName and sequence (it's an error occurs if there's no such binding) is returned.
If both command and sequence are missing then a list of all the event sequences for
which bindings have been defined for tagName.
pathName button operation ?args?
This command is used to control the button selectors within a treeview widget. It
has several forms, depending on operation:
pathName button activate tagOrId
Designates the node given by tagOrId as active. When a node is active it's
entry is drawn using its active icon (see the -activeicon option). Note
that there can be only one active entry at a time. The special id active
indicates the currently active node.
pathName button bind tagName ?sequence command?
Associates command with tagName such that whenever the event sequence given
by sequence occurs for an button of a node entry with this tag, command will
be invoked. The syntax is similar to the bind command except that it
operates on treeview buttons, rather than widgets. See the bind manual entry
for complete details on sequence and the substitutions performed on command
before invoking it.
If all arguments are specified then a new binding is created, replacing any
existing binding for the same sequence and tagName. If the first character
of command is + then command augments an existing binding rather than
replacing it. If no command argument is provided then the command currently
associated with tagName and sequence (it's an error occurs if there's no
such binding) is returned. If both command and sequence are missing then a
list of all the event sequences for which bindings have been defined for
tagName.
pathName button cget option
Returns the current value of the configuration option given by option.
Option may have any of the values accepted by the configure operation
described below.
pathName button configure ?option? ?value option value ...?
Query or modify the configuration options of the widget. If no option is
specified, returns a list describing all of the available options for
pathName (see Tk_ConfigureInfo for information on the format of this list).
If option is specified with no value, then the command returns a list
describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified). If
one or more option-value pairs are specified, then the command modifies the
given widget option(s) to have the given value(s); in this case the command
returns an empty string. Option and value are described in the section
BUTTON OPTIONS below.
pathName cget option
Returns the current value of the configuration option given by option. Option may
have any of the values accepted by the configure operation described below.
pathName close ?-recurse? tagOrId...
Closes the node specified by tagOrId. In addition, if a Tcl script was specified
by the -closecommand option, it is invoked. If the node is already closed, this
command has no effect. If the -recurse flag is present, each child node is
recursively closed.
pathName column operation ?args?
The following operations are available for treeview columns.
pathName column activate column
Sets the active column to column. Column is the name of a column in the
widget. When a column is active, it's drawn using its
-activetitlebackground and -activetitleforeground options. If column is the
"", then no column will be active. If no column argument is provided, then
the name of the currently active column is returned.
pathName column cget name option
Returns the current value of the column configuration option given by option
for name. Name is the name of column that corresponds to a data field.
Option may have any of the values accepted by the configure operation
described below.
pathName column configure name ?option? ?value option value ...?
Query or modify the configuration options of the column designated by name.
Name is the name of the column corresponding to a data field. If no option
is specified, returns a list describing all of the available options for
pathName (see Tk_ConfigureInfo for information on the format of this list).
If option is specified with no value, then the command returns a list
describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified). If
one or more option-value pairs are specified, then the command modifies the
given widget option(s) to have the given value(s); in this case the command
returns an empty string. Option and value are described in the section
COLUMN OPTIONS below.
pathName column delete field ?field...?
Deletes one of more columns designated by field. Note that this does not
delete the data fields themselves.
pathName column insert position field ?options...?
Inserts one of more columns designated by field. A column displays each
node's data field by the same name. If the node doesn't have the given
field, the cell is left blank. Position indicates where in the list of
columns to add the new column. It may be either a number or end.
pathName column invoke field
Invokes the Tcl command associated with the column field, if there is one
(using the column's -command option). The command is ignored if the
column's -state option set to disabled.
pathName column move name dest
Moves the column name to the destination position. Dest is the name of
another column or a screen position in the form @x,y.
pathName column names
Returns a list of the names of all columns in the widget. The list is
ordered as the columns are drawn from left-to-right.
pathName column nearest x ?y?
Returns the name of the column closest to the given X-Y screen coordinate.
If you provide a y argument (it's optional), a name is returned only when if
the point is over a column's title.
pathName configure ?option? ?value option value ...?
Query or modify the configuration options of the widget. If no option is
specified, returns a list describing all of the available options for pathName (see
Tk_ConfigureInfo for information on the format of this list). If option is
specified with no value, then the command returns a list describing the one named
option (this list will be identical to the corresponding sublist of the value
returned if no option is specified). If one or more option-value pairs are
specified, then the command modifies the given widget option(s) to have the given
value(s); in this case the command returns an empty string. Option and value are
described in the section TREEVIEW OPTIONS below.
pathName curselection
Returns a list containing the ids of all of the entries that are currently
selected. If there are no entries selected, then the empty string is returned.
pathName delete tagOrId...
Deletes one or more entries given by tagOrId and its children.
pathName entry operation ?args?
The following operations are available for treeview entries.
pathName entry activate tagOrId
Sets the active entry to the one specified by tagOrId. When an entry is
active it is drawn using its active icon (see the -activeicon option). Note
that there can be only one active node at a time. The special id of the
currently active node is active.
pathName entry cget option
Returns the current value of the configuration option given by option.
Option may have any of the values accepted by the configure operation
described below.
pathName entry children tagOrId ?first? ?last?
Returns a list of ids for the given range of children of tagOrId. TagOrId
is the id or tag of the node to be examined. If only a first argument is
present, then the id of the that child at that numeric position is returned.
If both first and last arguments are given, then the ids of all the children
in that range are returned. Otherwise the ids of all children are returned.
pathName entry configure ?option? ?value option value ...?
Query or modify the configuration options of the widget. If no option is
specified, returns a list describing all of the available options for
pathName (see Tk_ConfigureInfo for information on the format of this list).
If option is specified with no value, then the command returns a list
describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified). If
one or more option-value pairs are specified, then the command modifies the
given widget option(s) to have the given value(s); in this case the command
returns an empty string. Option and value are described below:
pathName entry delete tagOrId ?first ?last?
Deletes the one or more children nodes of the parent tagOrId. If first and
last arguments are present, they are positions designating a range of
children nodes to be deleted.
pathName entry isbefore tagOrId1 tagOrId2
Returns 1 if tagOrId1 is before tagOrId2 and 0 otherwise.
pathName entry ishidden tagOrId
Returns 1 if the node is currently hidden and 0 otherwise. A node is also
hidden if any of its ancestor nodes are closed or hidden.
pathName entry isopen tagOrId
Returns 1 if the node is currently open and 0 otherwise.
pathName entry size -recurse tagOrId
Returns the number of children for parent node tagOrId. If the -recurse
flag is set, the number of all its descendants is returned. The node itself
is not counted.
pathName find ?flags? first last
Finds for all entries matching the criteria given by flags. A list of ids for all
matching nodes is returned. First and last are ids designating the range of the
search in depth-first order. If last is before first, then nodes are searched in
reverse order. The valid flags are:
-name pattern
Specifies pattern to match against node names.
-full pattern
Specifies pattern to match against node pathnames.
-option pattern
Specifies pattern to match against the node entry's configuration
option.
-exact Patterns must match exactly. The is the default.
-glob Use global pattern matching. Matching is done in a fashion similar to
that used by the C-shell. For the two strings to match, their
contents must be identical except that the following special
sequences may appear in pattern:
* Matches any sequence of characters in string, including a null
string.
? Matches any single character in string.
[chars]
Matches any character in the set given by chars. If a sequence of
the form x-y appears in chars, then any character between x and y,
inclusive, will match.
\x Matches the single character x. This provides a way of
avoiding the special interpretation of the characters *?[]\ in
the pattern.
-regexp Use regular expression pattern matching (i.e. the same as implemented
by the regexp command).
-nonmatching
Pick entries that don't match.
-exec string
Specifies a Tcl script to be invoked for each matching node. Percent
substitutions are performed on string before it is executed. The
following substitutions are valid:
%W The pathname of the widget.
%p The name of the node.
%P The full pathname of the node.
%# The id of the node.
%% Translates to a single percent.
-count number
Stop searching after number matches.
-- Indicates the end of flags.
pathName focus tagOrId
Sets the focus to the node given by tagOrId. When a node has focus, it can receive
keyboard events. The special id focus designates the node that currently has
focus.
pathName get ?-full? tagOrId tagOrId...
Translates one or more ids to their node entry names. It returns a list of names
for all the ids specified. If the -full flag is set, then the full pathnames are
returned.
pathName hide ?flags? tagOrId...
Hides all nodes matching the criteria given by flags. The search is performed
recursively for each node given by tagOrId. The valid flags are described below:
-name pattern
Specifies pattern to match against node names.
-full pattern
Specifies pattern to match against node pathnames.
-option pattern
Specifies pattern to match against the node entry's configuration
option.
-exact Match patterns exactly. The is the default.
-glob Use global pattern matching. Matching is done in a fashion similar to
that used by the C-shell. For the two strings to match, their
contents must be identical except that the following special
sequences may appear in pattern:
* Matches any sequence of characters in string, including a null
string.
? Matches any single character in string.
[chars]
Matches any character in the set given by chars. If a sequence of
the form x-y appears in chars, then any character between x and y,
inclusive, will match.
\x Matches the single character x. This provides a way of
avoiding the special interpretation of the characters *?[]\ in
the pattern.
-regexp Use regular expression pattern matching (i.e. the same as implemented
by the regexp command).
-nonmatching
Hide nodes that don't match.
-- Indicates the end of flags.
pathName index ?-at tagOrId? string
Returns the id of the node specified by string. String may be a tag or node id.
Some special ids are normally relative to the node that has focus. The -at flag
lets you select another node.
pathName insert ?-at tagOrId? position path ?options...? ?path? ?options...?
Inserts one or more nodes at position. Position is the location (number or end)
where the new nodes are added to the parent node. Path is the pathname of the new
node. Pathnames can be formated either as a Tcl list (each element is a path
component) or as a string separated by a special character sequence (using the
-separator option). Pathnames are normally absolute, but the -at switch lets you
select a relative starting point. Its value is the id of the starting node.
All ancestors of the new node must already exist, unless the -autocreate option is
set. It is also an error if a node already exists, unless the -allowduplicates
option is set.
Option and value may have any of the values accepted by the entry configure
operation described in the ENTRY OPERATIONS section below. This command returns a
list of the ids of the new entries.
pathName move tagOrId how destId
Moves the node given by tagOrId to the destination node. The node can not be an
ancestor of the destination. DestId is the id of the destination node and can not
be the root of the tree. In conjunction with how, it describes how the move is
performed.
before Moves the node before the destination node.
after Moves the node after the destination node.
into Moves the node to the end of the destination's list of children.
pathName nearest x y ?varName?
Returns the id of the node entry closest to the given X-Y screen coordinate. The
optional argument varName is the name of variable which is set to either button or
select to indicate over what part of the node the coordinate lies. If the
coordinate is not directly over any node, then varName will contain the empty
string.
pathName open ?-recurse? tagOrId...
Opens the one or more nodes specified by tagOrId. If a node is not already open,
the Tcl script specified by the -opencommand option is invoked. If the -recurse
flag is present, then each descendant is recursively opened.
pathName range ?-open? first last
Returns the ids in depth-first order of the nodes between the first and last ids.
If the -open flag is present, it indicates to consider only open nodes. If last is
before first, then the ids are returned in reverse order.
pathName scan option args
This command implements scanning. It has two forms, depending on option:
pathName scan mark x y
Records x and y and the current view in the treeview window; used in
conjunction with later scan dragto commands. Typically this command is
associated with a mouse button press in the widget. It returns an empty
string.
pathName scan dragto x y.
Computes the difference between its x and y arguments and the x and y
arguments to the last scan mark command for the widget. It then adjusts the
view by 10 times the difference in coordinates. This command is typically
associated with mouse motion events in the widget, to produce the effect of
dragging the list at high speed through the window. The return value is an
empty string.
pathName see ?-anchor anchor? tagOrId
Adjusts the view of entries so that the node given by tagOrId is visible in the
widget window. It is an error if tagOrId is a tag that refers to more than one
node. By default the node's entry is displayed in the middle of the window. This
can changed using the -anchor flag. Its value is a Tk anchor position.
pathName selection option arg
This command is used to adjust the selection within a treeview widget. It has
several forms, depending on option:
pathName selection anchor tagOrId
Sets the selection anchor to the node given by tagOrId. If tagOrId refers
to a non-existent node, then the closest node is used. The selection anchor
is the end of the selection that is fixed while dragging out a selection
with the mouse. The special id anchor may be used to refer to the anchor
node.
pathName selection cancel
Clears the temporary selection of entries back to the current anchor.
Temporary selections are created by the selection mark operation.
pathName selection clear first ?last?
Removes the entries between first and last (inclusive) from the selection.
Both first and last are ids representing a range of entries. If last isn't
given, then only first is deselected. Entries outside the selection are not
affected.
pathName selection clearall
Clears the entire selection.
pathName selection mark tagOrId
Sets the selection mark to the node given by tagOrId. This causes the range
of entries between the anchor and the mark to be temporarily added to the
selection. The selection mark is the end of the selection that is fixed
while dragging out a selection with the mouse. The special id mark may be
used to refer to the current mark node. If tagOrId refers to a non-existent
node, then the mark is ignored. Resetting the mark will unselect the
previous range. Setting the anchor finalizes the range.
pathName selection includes tagOrId
Returns 1 if the node given by tagOrId is currently selected, 0 if it isn't.
pathName selection present
Returns 1 if any nodes are currently selected and 0 otherwise.
pathName selection set first ?last?
Selects all of the nodes in the range between first and last, inclusive,
without affecting the selection state of nodes outside that range.
pathName selection toggle first ?last?
Selects/deselects nodes in the range between first and last, inclusive, from
the selection. If a node is currently selected, it becomes deselected, and
visa versa.
pathName show ?flags? tagOrId...
Exposes all nodes matching the criteria given by flags. This is the inverse of the
hide operation. The search is performed recursively for each node given by
tagOrId. The valid flags are described below:
-name pattern
Specifies pattern to match against node names.
-full pattern
Specifies pattern to match against node pathnames.
-option pattern
Specifies pattern to match against the entry's configuration option.
-exact Match patterns exactly. The is the default.
-glob -glob Use global pattern matching. Matching is done in a fashion
similar to that used by the C-shell. For the two strings to match,
their contents must be identical except that the following special
sequences may appear in pattern:
* Matches any sequence of characters in string, including a null
string.
? Matches any single character in string.
[chars]
Matches any character in the set given by chars. If a sequence of
the form x-y appears in chars, then any character between x and y,
inclusive, will match.
\x Matches the single character x. This provides a way of
avoiding the special interpretation of the characters *?[]\ in
the pattern.
-regexp Use regular expression pattern matching (i.e. the same as implemented
by the regexp command).
-nonmatching
Expose nodes that don't match.
-- Indicates the end of flags.
pathName sort ?operation? args...
pathName sort auto ?boolean
Turns on/off automatic sorting of node entries. If boolean is true, entries
will be automatically sorted as they are opened, closed, inserted, or
deleted. If no boolean argument is provided, the current state is returned.
pathName sort cget option
Returns the current value of the configuration option given by option.
Option may have any of the values accepted by the configure operation
described below.
pathName sort configure ?option? ?value option value ...?
Query or modify the sorting configuration options of the widget. If no
option is specified, returns a list describing all of the available options
for pathName (see Tk_ConfigureInfo for information on the format of this
list). If option is specified with no value, then the command returns a
list describing the one named option (this list will be identical to the
corresponding sublist of the value returned if no option is specified). If
one or more option-value pairs are specified, then the command modifies the
given sorting option(s) to have the given value(s); in this case the
command returns an empty string. Option and value are described below:
-column string
Specifies the column to sort. Entries in the widget are rearranged
according to this column. If column is "" then no sort is performed.
-command string
Specifies a Tcl procedure to be called when sorting nodes. The
procedure is called with three arguments: the pathname of the widget
and the fields of two entries. The procedure returns 1 if the first
node is greater than the second, -1 is the second is greater, and 0
if equal.
-decreasing boolean
Indicates to sort in ascending/descending order. If boolean is true,
then the entries as in descending order. The default is no.
-mode string
Specifies how to compare entries when sorting. String may be one of
the following:
ascii Use string comparison based upon the ASCII collation
order.
dictionary Use dictionary-style comparison. This is the same as
ascii except (a) case is ignored except as a tie-
breaker and (b) if two strings contain embedded
numbers, the numbers compare as integers, not
characters. For example, "bigBoy" sorts between
"bigbang" and "bigboy", and "x10y" sorts between "x9y"
and "x11y".
integer Compares fields as integers.
real Compares fields as floating point numbers.
command Use the Tcl proc specified by the -command option to
compare entries when sorting. If no command is
specified, the sort reverts to ascii sorting.
pathName sort once ?flags? tagOrId...
Sorts the children for each entries specified by tagOrId. By default,
entries are sorted by name, but you can specify a Tcl proc to do your own
comparisons.
-recurse Recursively sort the entire branch, not just the children.
pathName tag operation args
Tags are a general means of selecting and marking nodes in the tree. A tag is just
a string of characters, and it may take any form except that of an integer. The
same tag may be associated with many different nodes.
Both operation and its arguments determine the exact behavior of the command. The
operations available for tags are listed below.
pathName tag add string id...
Adds the tag string to one of more entries.
pathName tag delete string id...
Deletes the tag string from one or more entries.
pathName tag forget string
Removes the tag string from all entries. It's not an error if no entries
are tagged as string.
pathName tag names ?id?
Returns a list of tags used. If an id argument is present, only those tags
used by the node designated by id are returned.
pathName tag nodes string
Returns a list of ids that have the tag string. If no node is tagged as
string, then an empty string is returned.
pathName text operation ?args?
This operation is used to provide text editing for cells (data fields in a column)
or entry labels. It has several forms, depending on operation:
pathName text apply
Applies the edited buffer, replacing the entry label or data field. The edit
window is hidden.
pathName text cancel
Cancels the editing operation, reverting the entry label or data value back
to the previous value. The edit window is hidden.
pathName text cget value
Returns the current value of the configuration option given by option.
Option may have any of the values accepted by the configure operation
described below.
pathName text configure ?option value?
Query or modify the configuration options of the edit window. If no option
is specified, returns a list describing all of the available options (see
Tk_ConfigureInfo for information on the format of this list). If option is
specified with no value, then the command returns a list describing the one
named option (this list will be identical to the corresponding sublist of
the value returned if no option is specified). If one or more option-value
pairs are specified, then the command modifies the given widget option(s) to
have the given value(s); in this case the command returns an empty string.
Option and value are described in the section TEXT EDITING OPTIONS below.
pathName text delete first last
Deletes the characters in the edit buffer between the two given character
positions.
pathName text get ?-root? x y
pathName text icursor index
pathName text index index
Returns the text index of given index.
pathName text insert index string
Insert the text string string into the edit buffer at the index index. For
example, the index 0 will prepend the buffer.
pathName text selection args
This operation controls the selection of the editing window. Note that this
differs from the selection of entries. It has the following forms:
pathName text selection adjust index
Adjusts either the first or last index of the selection.
pathName text selection clear
Clears the selection.
pathName text selection from index
Sets the anchor of the selection.
pathName text selection present
Indicates if a selection is present.
pathName text selection range start end
Sets both the anchor and mark of the selection.
pathName text selection to index
Sets the unanchored end (mark) of the selection.
pathName toggle tagOrId
Opens or closes the node given by tagOrId. If the corresponding -opencommand or
-closecommand option is set, then that command is also invoked.
pathName xview args
This command is used to query and change the horizontal position of the information
in the widget's window. It can take any of the following forms:
pathName xview
Returns a list containing two elements. Each element is a real fraction
between 0 and 1; together they describe the horizontal span that is visible
in the window. For example, if the first element is .2 and the second
element is .6, 20% of the treeview widget's text is off-screen to the left,
the middle 40% is visible in the window, and 40% of the text is off-screen
to the right. These are the same values passed to scrollbars via the
-xscrollcommand option.
pathName xview tagOrId
Adjusts the view in the window so that the character position given by
tagOrId is displayed at the left edge of the window. Character positions
are defined by the width of the character 0.
pathName xview moveto fraction
Adjusts the view in the window so that fraction of the total width of the
treeview widget's text is off-screen to the left. fraction must be a
fraction between 0 and 1.
pathName xview scroll number what
This command shifts the view in the window left or right according to number
and what. Number must be an integer. What must be either units or pages or
an abbreviation of one of these. If what is units, the view adjusts left or
right by number character units (the width of the 0 character) on the
display; if it is pages then the view adjusts by number screenfuls. If
number is negative then characters farther to the left become visible; if
it is positive then characters farther to the right become visible.
pathName yview ?args?
This command is used to query and change the vertical position of the text in the
widget's window. It can take any of the following forms:
pathName yview
Returns a list containing two elements, both of which are real fractions
between 0 and 1. The first element gives the position of the node at the
top of the window, relative to the widget as a whole (0.5 means it is
halfway through the treeview window, for example). The second element gives
the position of the node just after the last one in the window, relative to
the widget as a whole. These are the same values passed to scrollbars via
the -yscrollcommand option.
pathName yview tagOrId
Adjusts the view in the window so that the node given by tagOrId is
displayed at the top of the window.
pathName yview moveto fraction
Adjusts the view in the window so that the node given by fraction appears at
the top of the window. Fraction is a fraction between 0 and 1; 0 indicates
the first node, 0.33 indicates the node one-third the way through the
treeview widget, and so on.
pathName yview scroll number what
This command adjusts the view in the window up or down according to number
and what. Number must be an integer. What must be either units or pages.
If what is units, the view adjusts up or down by number lines; if it is
pages then the view adjusts by number screenfuls. If number is negative
then earlier nodes become visible; if it is positive then later nodes
become visible.
TREEVIEW OPTIONS
In addition to the configure operation, widget configuration options may also be set by
the Tk option command. The class resource name is TreeView.
option add *TreeView.Foreground white
option add *TreeView.Background blue
The following widget options are available:
-activebackground color
Sets the background color for active entries. A node is active when the mouse
passes over it's entry or using the activate operation.
-activeforeground color
Sets the foreground color of the active node. A node is active when the mouse
passes over it's entry or using the activate operation.
-activeicons images
Specifies images to be displayed for an entry's icon when it is active. Images is a
list of two Tk images: the first image is displayed when the node is open, the
second when it is closed.
-autocreate boolean
If boolean is true, automatically create missing ancestor nodes when inserting new
nodes. Otherwise flag an error. The default is no.
-allowduplicates boolean
If boolean is true, allow nodes with duplicate pathnames when inserting new nodes.
Otherwise flag an error. The default is no.
-background color
Sets the background color of the widget. The default is white.
-borderwidth pixels
Sets the width of the 3-D border around the outside edge of the widget. The
-relief option determines if the border is to be drawn. The default is 2.
-closecommand string
Specifies a Tcl script to be invoked when a node is closed. You can overrider this
for individual entries using the entry's -closecommand option. The default is "".
Percent substitutions are performed on string before it is executed. The following
substitutions are valid:
%W The pathname of the widget.
%p The name of the node.
%P The full pathname of the node.
%# The id of the node.
%% Translates to a single percent.
-cursor cursor
Specifies the widget's cursor. The default cursor is "".
-dashes number
Sets the dash style of the horizontal and vertical lines drawn connecting entries.
Number is the length in pixels of the dashes and gaps in the line. If number is 0,
solid lines will be drawn. The default is 1 (dotted).
-exportselection boolean
Indicates if the selection is exported. If the widget is exporting its selection
then it will observe the standard X11 protocols for handling the selection.
Selections are available as type STRING; the value of the selection will be the
label of the selected nodes, separated by newlines. The default is no.
-flat boolean
Indicates whether to display the tree as a flattened list. If boolean is true,
then the hierarchy will be a list of full paths for the nodes. This option also
has affect on sorting. See the SORT OPERATIONS section for more information. The
default is no.
-focusdashes dashList
Sets the dash style of the outline rectangle drawn around the entry label of the
node that current has focus. Number is the length in pixels of the dashes and gaps
in the line. If number is 0, a solid line will be drawn. The default is 1.
-focusforeground color
Sets the color of the focus rectangle. The default is black.
-font fontName
Specifies the font for entry labels. You can override this for individual entries
with the entry's -font configuration option. The default is *-Helvetica-Bold-R-
Normal-*-12-120-*.
-foreground color
Sets the text color of entry labels. You can override this for individual entries
with the entry's -foreground configuration option. The default is black.
-height pixels
Specifies the requested height of widget. The default is 400.
-hideroot boolean
If boolean is true, it indicates that no entry for the root node should be
displayed. The default is no.
-highlightbackground color
Specifies the normal color of the traversal highlight region when the widget does
not have the input focus.
-highlightcolor color
Specifies the color of the traversal highlight rectangle when the widget has the
input focus. The default is black.
-highlightthickness pixels
Specifies the width of the highlight rectangle indicating when the widget has input
focus. The value may have any of the forms acceptable to Tk_GetPixels. If the
value is zero, no focus highlight will be displayed. The default is 2.
-icons images
Specifies images for the entry's icon. Images is a list of two Tk images: the
first image is displayed when the node is open, the second when it is closed.
-linecolor color
Sets the color of the connecting lines drawn between entries. The default is
black.
-linespacing pixels
Sets the number of pixels spacing between entries. The default is 0.
-linewidth pixels
Set the width of the lines drawn connecting entries. If pixels is 0, no vertical
or horizontal lines are drawn. The default is 1.
-opencommand string
Specifies a Tcl script to be invoked when a node is open. You can override this
for individual entries with the entry's -opencommand configuration option. The
default is "". Percent substitutions are performed on string before it is
executed. The following substitutions are valid:
%W The pathname of the widget.
%p The name of the node.
%P The full pathname of the node.
%# The id of the node.
%% Translates to a single percent.
-relief relief
Specifies the 3-D effect for the widget. Relief specifies how the treeview widget
should appear relative to widget it is packed into; for example, raised means the
treeview widget should appear to protrude. The default is sunken.
-scrollmode mode
Specifies the style of scrolling to be used. The following styles are valid. This
is the default is hierbox.
listbox Like the listbox widget, the last entry can always be scrolled to the
top of the widget window. This allows the scrollbar thumb to shrink as
the last entry is scrolled upward.
hierbox Like the hierbox widget, the last entry can only be viewed at the
bottom of the widget window. The scrollbar stays a constant size.
canvas Like the canvas widget, the entries are bound within the scrolling
area.
-selectbackground color
Sets the background color selected node entries. The default is #ffffea.
-selectborderwidth pixels
Sets the width of the raised 3-D border drawn around the labels of selected
entries. The default is 0. -selectcommand string Specifies a Tcl script to invoked
when the set of selected nodes changes. The default is "".
-selectforeground color
Sets the color of the labels of selected node entries. The default is black.
-selectmode mode
Specifies the selection mode. If mode is single, only one node can be selected at a
time. If multiple more than one node can be selected. The default is single.
-separator string
Specifies the character sequence to use when splitting the path components. The
separator may be several characters wide (such as "::") Consecutive separators in a
pathname are treated as one. If string is the empty string, the pathnames are Tcl
lists. Each element is a path component. The default is "".
-showtitles boolean
If boolean is false, column titles are not be displayed. The default is yes.
-sortselection boolean
If boolean is true, nodes in the selection are ordered as they are currently
displayed (depth-first or sorted), not in the order they were selected. The default
is no.
-takefocus focus
Provides information used when moving the focus from window to window via keyboard
traversal (e.g., Tab and Shift-Tab). If focus is 0, this means that this window
should be skipped entirely during keyboard traversal. 1 means that the this window
should always receive the input focus. An empty value means that the traversal
scripts make the decision whether to focus on the window. The default is "1".
-trim string
Specifies a string leading characters to trim from entry pathnames before parsing.
This only makes sense if the -separator is also set. The default is "".
-width pixels
Sets the requested width of the widget. If pixels is 0, then the with is computed
from the contents of the treeview widget. The default is 200.
-xscrollcommand string
Specifies the prefix for a command used to communicate with horizontal scrollbars.
Whenever the horizontal view in the widget's window changes, the widget will
generate a Tcl command by concatenating the scroll command and two numbers. If
this option is not specified, then no command will be executed.
-xscrollincrement pixels
Sets the horizontal scrolling distance. The default is 20 pixels.
-yscrollcommand string
Specifies the prefix for a command used to communicate with vertical scrollbars.
Whenever the vertical view in the widget's window changes, the widget will generate
a Tcl command by concatenating the scroll command and two numbers. If this option
is not specified, then no command will be executed.
-yscrollincrement pixels
Sets the vertical scrolling distance. The default is 20 pixels.
ENTRY OPTIONS
Many widget configuration options have counterparts in entries. For example, there is a
-closecommand configuration option for both widget itself and for individual entries.
Options set at the widget level are global for all entries. If the entry configuration
option is set, then it overrides the widget option. This is done to avoid wasting memory
by replicated options. Most entries will have redundant options.
There is no resource class or name for entries.
-activeicons images
Specifies images to be displayed as the entry's icon when it is active. This
overrides the global -activeicons configuration option for the specific entry.
Images is a list of two Tk images: the first image is displayed when the node is
open, the second when it is closed.
-bindtags tagList
Specifies the binding tags for nodes. TagList is a list of binding tag names. The
tags and their order will determine how events are handled for nodes. Each tag in
the list matching the current event sequence will have its Tcl command executed.
The default value is all.
-button string
Indicates whether a button should be displayed on the left side of the node entry.
String can be yes, no, or auto. If auto, then a button is automatically displayed
if the node has children. This is the default.
-closecommand string
Specifies a Tcl script to be invoked when the node is closed. This overrides the
global -closecommand option for this entry. The default is "". Percent
substitutions are performed on string before it is executed. The following
substitutions are valid:
%W The pathname of the widget.
%p The name of the node.
%P The full pathname of the node.
%# The id of the node.
%% Translates to a single percent.
-data string
Sets data fields for the node. String is a list of name-value pairs to be set. The
default is "".
-font fontName
Sets the font for entry labels. This overrides the widget's -font option for this
node. The default is *-Helvetica-Bold-R-Normal-*-12-120-*.
-foreground color
Sets the text color of the entry label. This overrides the widget's -foreground
configuration option. The default is "".
-icons images
Specifies images to be displayed for the entry's icon. This overrides the global
-icons configuration option. Images is a list of two Tk images: the first image is
displayed when the node is open, the second when it is closed.
-label string
Sets the text for the entry's label. If not set, this defaults to the name of the
node. The default is "".
-opencommand string
Specifies a Tcl script to be invoked when the entry is opened. This overrides the
widget's -opencommand option for this node. The default is "". Percent
substitutions are performed on string before it is executed. The following
substitutions are valid:
%W The pathname of the widget.
%p The name of the node.
%P The full pathname of the node.
%# The id of the node.
%% Translates to a single percent.
BUTTON OPTIONS
Button configuration options may also be set by the option command. The resource subclass
is Button. The resource name is always button.
option add *TreeView.Button.Foreground white
option add *TreeView.button.Background blue
The following are the configuration options available for buttons.
-activebackground color
Sets the background color of active buttons. A button is made active when the
mouse passes over it or by the button activate operation.
-activeforeground color
Sets the foreground color of active buttons. A button is made active when the
mouse passes over it or by the button activate operation.
-background color
Sets the background of the button. The default is white.
-borderwidth pixels
Sets the width of the 3-D border around the button. The -relief option determines
if a border is to be drawn. The default is 1.
-closerelief relief
Specifies the 3-D effect for the closed button. Relief indicates how the button
should appear relative to the widget; for example, raised means the button should
appear to protrude. The default is solid.
-cursor cursor
Sets the widget's cursor. The default cursor is "".
-foreground color
Sets the foreground color of buttons. The default is black.
-images images
Specifies images to be displayed for the button. Images is a list of two Tk
images: the first image is displayed when the button is open, the second when it is
closed. If the images is the empty string, then a plus/minus gadget is drawn. The
default is "".
-openrelief relief
Specifies the 3-D effect of the open button. Relief indicates how the button
should appear relative to the widget; for example, raised means the button should
appear to protrude. The default is flat.
-size pixels
Sets the requested size of the button. The default is 0.
COLUMN OPTIONS
Column configuration options may also be set by the option command. The resource subclass
is Column. The resource name is the name of the column.
option add *TreeView.Column.Foreground white
option add *TreeView.treeView.Background blue
The following configuration options are available for columns.
-background color
Sets the background color of the column. This overrides the widget's -background
option. The default is white.
-borderwidth pixels
Sets the width of the 3-D border of the column. The -relief option determines if a
border is to be drawn. The default is 0.
-edit boolean
Indicates if the column's data fields can be edited. If boolean is false, the data
fields in the column may not be edited. The default is yes.
-foreground color
Specifies the foreground color of the column. You can override this for individual
entries with the entry's -foreground option. The default is black.
-font fontName
Sets the font for a column. You can override this for individual entries with the
entry's -font option. The default is *-Helvetica-Bold-R-Normal-*-12-120-*.
-hide boolean
If boolean is true, the column is not displayed. The default is yes.
-justify justify
Specifies how the column data fields title should be justified within the column.
This matters only when the column is wider than the data field to be display.
Justify must be left, right, or center. The default is left.
-pad pad
Specifies how much padding for the left and right sides of the column. Pad is a
list of one or two screen distances. If pad has two elements, the left side of the
column is padded by the first distance and the right side by the second. If pad
has just one distance, both the left and right sides are padded evenly. The
default is 2.
-relief relief
Specifies the 3-D effect of the column. Relief specifies how the column should
appear relative to the widget; for example, raised means the column should appear
to protrude. The default is flat.
-state state
Sets the state of the column. If state is disable then the column title can not be
activated nor invoked. The default is normal.
-text string
Sets the title for the column. The default is "".
-titleforeground color
Sets the foreground color of the column title. The default is black.
-titleshadow color
Sets the color of the drop shadow of the column title. The default is "".
-width pixels
Sets the requested width of the column. This overrides the computed with of the
column. If pixels is 0, the width is computed as from the contents of the column.
The default is 0.
TEXT EDITING OPTIONS
Text edit window configuration options may also be set by the option command. The resource
class is TreeViewEditor. The resource name is always edit.
option add *TreeViewEditor.Foreground white
option add *edit.Background blue
The following are the configuration options available for the text editing window.
-background color
Sets the background of the text edit window. The default is white.
-borderwidth pixels
Sets the width of the 3-D border around the edit window. The -relief option
determines if a border is to be drawn. The default is 1.
-exportselection boolean
Indicates if the text selection is exported. If the edit window is exporting its
selection then it will observe the standard X11 protocols for handling the
selection. Selections are available as type STRING. The default is no.
-relief relief
Specifies the 3-D effect of the edit window. Relief indicates how the background
should appear relative to the edit window; for example, raised means the background
should appear to protrude. The default is solid.
-selectbackground color
Sets the background of the selected text in the edit window. The default is white.
-selectborderwidth pixels
Sets the width of the 3-D border around the selected text in the edit window. The
-selectrelief option determines if a border is to be drawn. The default is 1.
-selectforeground color
Sets the foreground of the selected text in the edit window. The default is white.
-selectrelief relief
Specifies the 3-D effect of the selected text in the edit window. Relief indicates
how the text should appear relative to the edit window; for example, raised means
the text should appear to protrude. The default is flat.
DEFAULT BINDINGS
Tk automatically creates class bindings for treeviews that give them Motif-like behavior.
Much of the behavior of a treeview widget is determined by its -selectmode option, which
selects one of two ways of dealing with the selection.
If the selection mode is single, only one node can be selected at a time. Clicking button
1 on an node selects it and deselects any other selected item.
If the selection mode is multiple, any number of entries may be selected at once,
including discontiguous ranges. Clicking Control-Button-1 on a node entry toggles its
selection state without affecting any other entries. Pressing Shift-Button-1 on a node
entry selects it, extends the selection.
[1] In extended mode, the selected range can be adjusted by pressing button 1 with the
Shift key down: this modifies the selection to consist of the entries between the
anchor and the entry under the mouse, inclusive. The un-anchored end of this new
selection can also be dragged with the button down.
[2] In extended mode, pressing button 1 with the Control key down starts a toggle
operation: the anchor is set to the entry under the mouse, and its selection state
is reversed. The selection state of other entries isn't changed. If the mouse is
dragged with button 1 down, then the selection state of all entries between the
anchor and the entry under the mouse is set to match that of the anchor entry; the
selection state of all other entries remains what it was before the toggle
operation began.
[3] If the mouse leaves the treeview window with button 1 down, the window scrolls away
from the mouse, making information visible that used to be off-screen on the side
of the mouse. The scrolling continues until the mouse re-enters the window, the
button is released, or the end of the hierarchy is reached.
[4] Mouse button 2 may be used for scanning. If it is pressed and dragged over the
treeview widget, the contents of the hierarchy drag at high speed in the direction
the mouse moves.
[5] If the Up or Down key is pressed, the location cursor (active entry) moves up or
down one entry. If the selection mode is browse or extended then the new active
entry is also selected and all other entries are deselected. In extended mode the
new active entry becomes the selection anchor.
[6] In extended mode, Shift-Up and Shift-Down move the location cursor (active entry)
up or down one entry and also extend the selection to that entry in a fashion
similar to dragging with mouse button 1.
[7] The Left and Right keys scroll the treeview widget view left and right by the width
of the character 0. Control-Left and Control-Right scroll the treeview widget view
left and right by the width of the window. Control-Prior and Control-Next also
scroll left and right by the width of the window.
[8] The Prior and Next keys scroll the treeview widget view up and down by one page
(the height of the window).
[9] The Home and End keys scroll the treeview widget horizontally to the left and right
edges, respectively.
[10] Control-Home sets the location cursor to the the first entry, selects that entry,
and deselects everything else in the widget.
[11] Control-End sets the location cursor to the the last entry, selects that entry, and
deselects everything else in the widget.
[12] In extended mode, Control-Shift-Home extends the selection to the first entry and
Control-Shift-End extends the selection to the last entry.
[13] In multiple mode, Control-Shift-Home moves the location cursor to the first entry
and Control-Shift-End moves the location cursor to the last entry.
[14] The space and Select keys make a selection at the location cursor (active entry)
just as if mouse button 1 had been pressed over this entry.
[15] In extended mode, Control-Shift-space and Shift-Select extend the selection to the
active entry just as if button 1 had been pressed with the Shift key down.
[16] In extended mode, the Escape key cancels the most recent selection and restores all
the entries in the selected range to their previous selection state.
[17] Control-slash selects everything in the widget, except in single and browse modes,
in which case it selects the active entry and deselects everything else.
[18] Control-backslash deselects everything in the widget, except in browse mode where
it has no effect.
[19] The F16 key (labelled Copy on many Sun workstations) or Meta-w copies the selection
in the widget to the clipboard, if there is a selection.
The behavior of treeview widgets can be changed by defining new bindings for individual
widgets or by redefining the class bindings.
WIDGET BINDINGS
In addition to the above behavior, the following additional behavior is defined by the
default widget class (TreeView) bindings.
<ButtonPress-2>
Starts scanning.
<B2-Motion>
Adjusts the scan.
<ButtonRelease-2>
Stops scanning.
<B1-Leave>
Starts auto-scrolling.
<B1-Enter>
Starts auto-scrolling
<KeyPress-Up>
Moves the focus to the previous entry.
<KeyPress-Down>
Moves the focus to the next entry.
<Shift-KeyPress-Up>
Moves the focus to the previous sibling.
<Shift-KeyPress-Down>
Moves the focus to the next sibling.
<KeyPress-Prior>
Moves the focus to first entry. Closed or hidden entries are ignored.
<KeyPress-Next>
Move the focus to the last entry. Closed or hidden entries are ignored.
<KeyPress-Left>
Closes the entry. It is not an error if the entry has no children.
<KeyPress-Right>
Opens the entry, displaying its children. It is not an error if the entry has no
children.
<KeyPress-space>
In "single" select mode this selects the entry. In "multiple" mode, it toggles the
entry (if it was previous selected, it is not deselected).
<KeyRelease-space>
Turns off select mode.
<KeyPress-Return>
Sets the focus to the current entry.
<KeyRelease-Return>
Turns off select mode.
<KeyPress>
Moves to the next entry whose label starts with the letter typed.
<KeyPress-Home>
Moves the focus to first entry. Closed or hidden entries are ignored.
<KeyPress-End>
Move the focus to the last entry. Closed or hidden entries are ignored.
<KeyPress-F1>
Opens all entries.
<KeyPress-F2>
Closes all entries (except root).
BUTTON BINDINGS
Buttons have bindings. There are associated with the "all" bindtag (see the entry's
-bindtag option). You can use the bind operation to change them.
<Enter>
Highlights the button of the current entry.
<Leave>
Returns the button back to its normal state.
<ButtonRelease-1>
Adjust the view so that the current entry is visible.
ENTRY BINDINGS
Entries have default bindings. There are associated with the "all" bindtag (see the
entry's -bindtag option). You can use the bind operation to modify them.
<Enter>
Highlights the current entry.
<Leave>
Returns the entry back to its normal state.
<ButtonPress-1>
Sets the selection anchor the current entry.
<Double-ButtonPress-1>
Toggles the selection of the current entry.
<B1-Motion>
For "multiple" mode only. Saves the current location of the pointer for auto-
scrolling. Resets the selection mark.
<ButtonRelease-1>
For "multiple" mode only. Sets the selection anchor to the current entry.
<Shift-ButtonPress-1>
For "multiple" mode only. Extends the selection.
<Shift-Double-ButtonPress-1>
Place holder. Does nothing.
<Shift-B1-Motion>
Place holder. Does nothing.
<Shift-ButtonRelease-1>
Stop auto-scrolling.
<Control-ButtonPress-1>
For "multiple" mode only. Toggles and extends the selection.
<Control-Double-ButtonPress-1>
Place holder. Does nothing.
<Control-B1-Motion>
Place holder. Does nothing.
<Control-ButtonRelease-1>
Stops auto-scrolling.
<Control-Shift-ButtonPress-1>
???
<Control-Shift-Double-ButtonPress-1>
Place holder. Does nothing.
<Control-Shift-B1-Motion>
Place holder. Does nothing.
COLUMN BINDINGS
Columns have bindings too. They are associated with the column's "all" bindtag (see the
column -bindtag option). You can use the column bind operation to change them.
<Enter>
Highlights the current column title.
<Leave>
Returns the column back to its normal state.
<ButtonRelease-1>
Invokes the command (see the column's -command option) if one if specified.
COLUMN RULE BINDINGS
<Enter>
Highlights the current and activates the ruler.
<Leave>
Returns the column back to its normal state. Deactivates the ruler.
<ButtonPress-1>
Sets the resize anchor for the column.
<B1-Motion>
Sets the resize mark for the column.
<ButtonRelease-1>
Adjust the size of the column, based upon the resize anchor and mark positions.
EXAMPLE
The treeview command creates a new widget.
treeview .h -bg white
A new Tcl command .h is also created. This command can be used to query and modify the
treeview widget. For example, to change the background color of the table to "green", you
use the new command and the widget's configure operation.
# Change the background color.
.h configure -background "green"
By default, the treeview widget will automatically create a new tree object to contain the
data. The name of the new tree is the pathname of the widget. Above, the new tree object
name is ".h". But you can use the -tree option to specify the name of another tree.
# View the tree "myTree".
.h configure -tree "myTree"
When a new tree is created, it contains only a root node. The node is automatically
opened. The id of the root node is always 0 (you can use also use the special id root).
The insert operation lets you insert one or more new entries into the tree. The last
argument is the node's pathname.
# Create a new entry named "myEntry"
set id [.h insert end "myEntry"]
This appends a new node named "myEntry". It will positioned as the last child of the root
of the tree (using the position "end"). You can supply another position to order the node
within its siblings.
# Prepend "fred".
set id [.h insert 0 "fred"]
Entry names do not need to be unique. By default, the node's label is its name. To
supply a different text label, add the -label option.
# Create a new node named "fred"
set id [.h insert end "fred" -label "Fred Flintstone"]
The insert operation returns the id of the new node. You can also use the index operation
to get this information.
# Get the id of "fred"
.h index "fred"
To insert a node somewhere other than root, use the -at switch. It takes the id of the
node where the new child will be added.
# Create a new node "barney" in "fred".
.h insert -at $id end "barney"
A pathname describes the path to an entry in the hierarchy. It's a list of entry names
that compose the path in the tree. Therefore, you can also add "barney" to "fred" as
follows.
# Create a new sub-entry of "fred"
.h insert end "fred barney"
Every name in the list is ancestor of the next. All ancestors must already exist. That
means that an entry "fred" is an ancestor of "barney" and must already exist. But you can
use the -autocreate configuration option to force the creation of ancestor nodes.
# Force the creation of ancestors.
.h configure -autocreate yes
.h insert end "fred barney wilma betty"
Sometimes the pathname is already separated by a character sequence rather than formed as
a list. A file name is a good example of this. You can use the -separator option to
specify a separator string to split the path into its components. Each pathname inserted
is automatically split using the separator string as a separator. Multiple separators are
treated as one.
.h configure -separator /
.h insert end "/usr/local/tcl/bin"
If the path is prefixed by extraneous characters, you can automatically trim it off using
the -trim option. It removed the string from the path before it is parsed.
.h configure -trim C:/windows -separator /
.h insert end "C:/window/system"
You can insert more than one entry at a time with the insert operation. This can be much
faster than looping over a list of names.
# The slow way
foreach f [glob $dir/*] {
.h insert end $f
}
# The fast way
eval .h insert end [glob $dir/*]
In this case, the insert operation will return a list of ids of the new entries.
You can delete entries with the delete operation. It takes one or more tags of ids as its
argument. It deletes the entry and all its children.
.h delete $id
Entries have several configuration options. They control the appearance of the entry's
icon and label. We have already seen the -label option that sets the entry's text label.
The entry configure operation lets you set or modify an entry's configuration options.
.h entry configure $id -color red -font fixed
You can hide an entry and its children using the -hide option.
.h entry configure $id -hide yes
More that one entry can be configured at once. All entries specified are configured with
the same options.
.h entry configure $i1 $i2 $i3 $i4 -color brown
An icon is displayed for each entry. It's a Tk image drawn to the left of the label. You
can set the icon with the entry's -icons option. It takes a list of two image names: one
to represent the open entry, another when it is closed.
set im1 [image create photo -file openfolder.gif]
set im2 [image create photo -file closefolder.gif]
.h entry configure $id -icons "$im1 $im2"
If -icons is set to the empty string, no icons are display.
If an entry has children, a button is displayed to the left of the icon. Clicking the
mouse on this button opens or closes the sub-hierarchy. The button is normally a + or -
symbol, but can be configured in a variety of ways using the button configure operation.
For example, the + and - symbols can be replaced with Tk images.
set im1 [image create photo -file closefolder.gif]
set im2 [image create photo -file downarrow.gif]
.h button configure $id -images "$im1 $im2" \
-openrelief raised -closerelief raised
Entries can contain an arbitrary number of data fields. Data fields are name-value pairs.
Both the value and name are strings. The entry's -data option lets you set data fields.
.h entry configure $id -data {mode 0666 group users}
The -data takes a list of name-value pairs.
You can display these data fields as columns in the treeview widget. You can create and
configure columns with the column operation. For example, to add a new column to the
widget, use the column insert operation. The last argument is the name of the data field
that you want to display.
.h column insert end "mode"
The column title is displayed at the top of the column. By default, it's is the field
name. You can override this using the column's -text option.
.h column insert end "mode" -text "File Permissions"
Columns have several configuration options. The column configure operation lets you query
or modify column options.
.h column configure "mode" -justify left
The -justify option says how the data is justified within in the column. The -hide option
indicates whether the column is displayed.
.h column configure "mode" -hide yes
Entries can be selected by clicking on the mouse. Selected entries are drawn using the
colors specified by the -selectforeground and -selectbackground configuration options.
The selection itself is managed by the selection operation.
# Clear all selections
.h selection clear 0 end
# Select the root node
.h selection set 0
The curselection operation returns a list of ids of all the selected entries.
set ids [.h curselection]
You can use the get operation to convert the ids to their pathnames.
set names [eval .h get -full $ids]
If a treeview is exporting its selection (using the -exportselection option), then it will
observe the standard X11 protocols for handling the selection. Treeview selections are
available as type STRING; the value of the selection will be the pathnames of the selected
entries, separated by newlines.
The treeview supports two modes of selection: single and multiple. In single select mode,
only one entry can be selected at a time, while multiple select mode allows several
entries to be selected. The mode is set by the widget's -selectmode option.
.h configure -selectmode "multiple"
You can be notified when the list of selected entries changes. The widget's
-selectcommand specifies a Tcl procedure that is called whenever the selection changes.
proc SelectNotify { widget } {
set ids [$widget curselection]
}
.h configure -selectcommand "SelectNotify .h"
The widget supports the standard Tk scrolling and scanning operations. The treeview can
be both horizontally and vertically. You can attach scrollbars to the treeview the same
way as the listbox or canvas widgets.
scrollbar .xbar -orient horizontal -command ".h xview"
scrollbar .ybar -orient vertical -command ".h yview"
.h configure -xscrollcommand ".xbar set" \
-yscrollcommand ".ybar set"
There are three different modes of scrolling: listbox, canvas, and hierbox. In listbox
mode, the last entry can always be scrolled to the top of the widget. In hierbox mode,
the last entry is always drawn at the bottom of the widget. The scroll mode is set by the
widget's -selectmode option.
.h configure -scrollmode "listbox"
Entries can be programmatically opened or closed using the open and close operations
respectively.
.h open $id
.h close $id
When an entry is opened, a Tcl procedure can be automatically invoked. The -opencommand
option specifies this procedure. This procedure can lazily insert entries as needed.
proc AddEntries { dir } {
eval .h insert end [glob -nocomplain $dir/*]
}
.h configure -opencommand "AddEntries %P"
Now when an entry is opened, the procedure AddEntries is called and adds children to the
entry. Before the command is invoked, special "%" substitutions (like bind) are
performed. Above, %P is translated to the pathname of the entry.
The same feature exists when an entry is closed. The -closecommand option specifies the
procedure.
proc DeleteEntries { id } {
.h entry delete $id 0 end
}
.h configure -closecommand "DeleteEntries %#"
When an entry is closed, the procedure DeleteEntries is called and deletes the entry's
children using the entry delete operation (%# is the id of entry).
KEYWORDS
treeview, widget