1 :mod:`ttk` --- Tk themed widgets
2 ================================
5 :synopsis: Tk themed widget set
6 .. sectionauthor:: Guilherme Polo <ggpolo@gmail.com>
11 The :mod:`ttk` module provides access to the Tk themed widget set, which has
12 been introduced in Tk 8.5. If Python is not compiled against Tk 8.5 code may
13 still use this module as long as Tile is installed. However, some features
14 provided by the new Tk, like anti-aliased font rendering under X11, window
15 transparency (on X11 you will need a composition window manager) will be
18 The basic idea of :mod:`ttk` is to separate, to the extent possible, the code
19 implementing a widget's behavior from the code implementing its appearance.
24 `Tk Widget Styling Support <http://www.tcl.tk/cgi-bin/tct/tip/48>`_
25 The document which brought up theming support for Tk
31 To start using Ttk, import its module::
39 may optionally want to use this::
44 And then several :mod:`ttk` widgets (:class:`Button`, :class:`Checkbutton`,
45 :class:`Entry`, :class:`Frame`, :class:`Label`, :class:`LabelFrame`,
46 :class:`Menubutton`, :class:`PanedWindow`, :class:`Radiobutton`, :class:`Scale`
47 and :class:`Scrollbar`) will automatically substitute for the Tk widgets.
49 This has the direct benefit of using the new widgets, giving better look & feel
50 across platforms, but be aware that they are not totally compatible. The main
51 difference is that widget options such as "fg", "bg" and others related to
52 widget styling are no longer present in Ttk widgets. Use :class:`ttk.Style` to
53 achieve the same (or better) styling.
57 `Converting existing applications to use the Tile widgets <http://tktable.sourceforge.net/tile/doc/converting.txt>`_
58 A text which talks in Tcl terms about differences typically found when
59 converting applications to use the new widgets.
65 Ttk comes with 17 widgets, 11 of which already exist in Tkinter:
66 :class:`Button`, :class:`Checkbutton`, :class:`Entry`, :class:`Frame`,
67 :class:`Label`, :class:`LabelFrame`, :class:`Menubutton`,
68 :class:`PanedWindow`, :class:`Radiobutton`, :class:`Scale` and
69 :class:`Scrollbar`. The 6 new widget classes are: :class:`Combobox`,
70 :class:`Notebook`, :class:`Progressbar`, :class:`Separator`,
71 :class:`Sizegrip` and :class:`Treeview`. All of these classes are
72 subclasses of :class:`Widget`.
74 As said previously, you will notice changes in look-and-feel as well in the
75 styling code. To demonstrate the latter, a very simple example is shown below.
79 l1 = Tkinter.Label(text="Test", fg="black", bg="white")
80 l2 = Tkinter.Label(text="Test", fg="black", bg="white")
83 Corresponding Ttk code::
86 style.configure("BW.TLabel", foreground="black", background="white")
88 l1 = ttk.Label(text="Test", style="BW.TLabel")
89 l2 = ttk.Label(text="Test", style="BW.TLabel")
91 For more information about TtkStyling_ read the :class:`Style` class
97 :class:`ttk.Widget` defines standard options and methods supported by Tk
98 themed widgets and is not supposed to be directly instantiated.
104 All the :mod:`ttk` widgets accept the following options:
106 +-----------+--------------------------------------------------------------+
107 | Option | Description |
108 +===========+==============================================================+
109 | class | Specifies the window class. The class is used when querying |
110 | | the option database for the window's other options, to |
111 | | determine the default bindtags for the window, and to select |
112 | | the widget's default layout and style. This is a read-only |
113 | | option which may only be specified when the window is |
115 +-----------+--------------------------------------------------------------+
116 | cursor | Specifies the mouse cursor to be used for the widget. If set |
117 | | to the empty string (the default), the cursor is inherited |
118 | | from the parent widget. |
119 +-----------+--------------------------------------------------------------+
120 | takefocus | Determines whether the window accepts the focus during |
121 | | keyboard traversal. 0, 1 or an empty string is returned. |
122 | | If 0, the window should be skipped entirely |
123 | | during keyboard traversal. If 1, the window |
124 | | should receive the input focus as long as it is viewable. |
125 | | An empty string means that the traversal scripts make the |
126 | | decision about whether or not to focus on the window. |
127 +-----------+--------------------------------------------------------------+
128 | style | May be used to specify a custom widget style. |
129 +-----------+--------------------------------------------------------------+
132 Scrollable Widget Options
133 ^^^^^^^^^^^^^^^^^^^^^^^^^
135 The following options are supported by widgets that are controlled by a
138 +----------------+---------------------------------------------------------+
139 | option | description |
140 +================+=========================================================+
141 | xscrollcommand | Used to communicate with horizontal scrollbars. |
143 | | When the view in the widget's window changes, the widget|
144 | | will generate a Tcl command based on the scrollcommand. |
146 | | Usually this option consists of the |
147 | | :meth:`Scrollbar.set` method of some scrollbar. This |
149 | | the scrollbar to be updated whenever the view in the |
150 | | window changes. |
151 +----------------+---------------------------------------------------------+
152 | yscrollcommand | Used to communicate with vertical scrollbars. |
153 | | For more information, see above. |
154 +----------------+---------------------------------------------------------+
160 The following options are supported by labels, buttons and other button-like
163 .. tabularcolumns:: |p{0.2\textwidth}|p{0.7\textwidth}|
166 +--------------+-----------------------------------------------------------+
167 | option | description |
168 +==============+===========================================================+
169 | text | Specifies a text string to be displayed inside the widget.|
170 +--------------+-----------------------------------------------------------+
171 | textvariable | Specifies a name whose value will be used in place of the |
172 | | text option resource. |
173 +--------------+-----------------------------------------------------------+
174 | underline | If set, specifies the index (0-based) of a character to |
175 | | underline in the text string. The underline character is |
176 | | used for mnemonic activation. |
177 +--------------+-----------------------------------------------------------+
178 | image | Specifies an image to display. This is a list of 1 or more|
179 | | elements. The first element is the default image name. The|
180 | | rest of the list is a sequence of statespec/value pairs as|
181 | | defined by :meth:`Style.map`, specifying different images |
182 | | to use when the widget is in a particular state or a |
183 | | combination of states. All images in the list should have |
185 +--------------+-----------------------------------------------------------+
186 | compound | Specifies how to display the image relative to the text, |
187 | | in the case both text and image options are present. |
188 | | Valid values are: |
190 | | * text: display text only |
191 | | * image: display image only |
192 | | * top, bottom, left, right: display image above, below, |
193 | | left of, or right of the text, respectively. |
194 | | * none: the default. display the image if present, |
195 | | otherwise the text. |
196 +--------------+-----------------------------------------------------------+
197 | width | If greater than zero, specifies how much space, in |
198 | | character widths, to allocate for the text label; if less |
199 | | than zero, specifies a minimum width. If zero or |
200 | | unspecified, the natural width of the text label is used. |
201 +--------------+-----------------------------------------------------------+
204 Compatibility Options
205 ^^^^^^^^^^^^^^^^^^^^^
207 +--------+----------------------------------------------------------------+
208 | option | description |
209 +========+================================================================+
210 | state | May be set to "normal" or "disabled" to control the "disabled" |
211 | | state bit. This is a write-only option: setting it changes the |
212 | | widget state, but the :meth:`Widget.state` method does not |
213 | | affect this option. |
214 +--------+----------------------------------------------------------------+
219 The widget state is a bitmap of independent state flags.
221 +------------+-------------------------------------------------------------+
222 | flag | description |
223 +============+=============================================================+
224 | active | The mouse cursor is over the widget and pressing a mouse |
225 | | button will cause some action to occur. |
226 +------------+-------------------------------------------------------------+
227 | disabled | Widget is disabled under program control. |
228 +------------+-------------------------------------------------------------+
229 | focus | Widget has keyboard focus. |
230 +------------+-------------------------------------------------------------+
231 | pressed | Widget is being pressed. |
232 +------------+-------------------------------------------------------------+
233 | selected | "On", "true", or "current" for things like Checkbuttons and |
235 +------------+-------------------------------------------------------------+
236 | background | Windows and Mac have a notion of an "active" or foreground |
237 | | window. The *background* state is set for widgets in a |
238 | | background window, and cleared for those in the foreground |
240 +------------+-------------------------------------------------------------+
241 | readonly | Widget should not allow user modification. |
242 +------------+-------------------------------------------------------------+
243 | alternate | A widget-specific alternate display format. |
244 +------------+-------------------------------------------------------------+
245 | invalid | The widget's value is invalid. |
246 +------------+-------------------------------------------------------------+
248 A state specification is a sequence of state names, optionally prefixed with
249 an exclamation point indicating that the bit is off.
255 Besides the methods described below, the :class:`ttk.Widget` class supports the
256 :meth:`Tkinter.Widget.cget` and :meth:`Tkinter.Widget.configure` methods.
260 .. method:: identify(x, y)
262 Returns the name of the element at position *x* *y*, or the empty string
263 if the point does not lie within any element.
265 *x* and *y* are pixel coordinates relative to the widget.
268 .. method:: instate(statespec[, callback=None[, *args[, **kw]]])
270 Test the widget's state. If a callback is not specified, returns True
271 if the widget state matches *statespec* and False otherwise. If callback
272 is specified then it is called with *args* if widget state matches
276 .. method:: state([statespec=None])
278 Modify or read widget state. If *statespec* is specified, sets the
279 widget state accordingly and returns a new *statespec* indicating
280 which flags were changed. If *statespec* is not specified, returns
281 the currently-enabled state flags.
283 *statespec* will usually be a list or a tuple.
289 The :class:`ttk.Combobox` widget combines a text field with a pop-down list of
290 values. This widget is a subclass of :class:`Entry`.
292 Besides the methods inherited from :class:`Widget` (:meth:`Widget.cget`,
293 :meth:`Widget.configure`, :meth:`Widget.identify`, :meth:`Widget.instate`
294 and :meth:`Widget.state`) and those inherited from :class:`Entry`
295 (:meth:`Entry.bbox`, :meth:`Entry.delete`, :meth:`Entry.icursor`,
296 :meth:`Entry.index`, :meth:`Entry.inset`, :meth:`Entry.selection`,
297 :meth:`Entry.xview`), this class has some other methods, described at
298 :class:`ttk.Combobox`.
304 This widget accepts the following options:
306 +-----------------+--------------------------------------------------------+
307 | option | description |
308 +=================+========================================================+
309 | exportselection | Boolean value. If set, the widget selection is linked |
310 | | to the Window Manager selection (which can be returned |
311 | | by invoking :meth:`Misc.selection_get`, for example). |
312 +-----------------+--------------------------------------------------------+
313 | justify | Specifies how the text is aligned within the widget. |
314 | | One of "left", "center", or "right". |
315 +-----------------+--------------------------------------------------------+
316 | height | Specifies the height of the pop-down listbox, in rows. |
317 +-----------------+--------------------------------------------------------+
318 | postcommand | A script (possibly registered with |
319 | | :meth:`Misc.register`) that |
320 | | is called immediately before displaying the values. It |
321 | | may specify which values to display. |
322 +-----------------+--------------------------------------------------------+
323 | state | One of "normal", "readonly", or "disabled". In the |
324 | | "readonly" state, the value may not be edited directly,|
325 | | and the user can only select one of the values from the|
326 | | dropdown list. In the "normal" state, the text field is|
327 | | directly editable. In the "disabled" state, no |
328 | | interaction is possible. |
329 +-----------------+--------------------------------------------------------+
330 | textvariable | Specifies a name whose value is linked to the widget |
331 | | value. Whenever the value associated with that name |
332 | | changes, the widget value is updated, and vice versa. |
333 | | See :class:`Tkinter.StringVar`. |
334 +-----------------+--------------------------------------------------------+
335 | values | Specifies the list of values to display in the |
336 | | drop-down listbox. |
337 +-----------------+--------------------------------------------------------+
338 | width | Specifies an integer value indicating the desired width|
339 | | of the entry window, in average-size characters of the |
341 +-----------------+--------------------------------------------------------+
347 The combobox widget generates a **<<ComboboxSelected>>** virtual event
348 when the user selects an element from the list of values.
356 .. method:: current([newindex=None])
358 If *newindex* is specified, sets the combobox value to the element
359 position *newindex*. Otherwise, returns the index of the current value or
360 -1 if the current value is not in the values list.
365 Returns the current value of the combobox.
368 .. method:: set(value)
370 Sets the value of the combobox to *value*.
376 The Ttk Notebook widget manages a collection of windows and displays a single
377 one at a time. Each child window is associated with a tab, which the user
378 may select to change the currently-displayed window.
384 This widget accepts the following specific options:
386 +---------+----------------------------------------------------------------+
387 | option | description |
388 +=========+================================================================+
389 | height | If present and greater than zero, specifies the desired height |
390 | | of the pane area (not including internal padding or tabs). |
391 | | Otherwise, the maximum height of all panes is used. |
392 +---------+----------------------------------------------------------------+
393 | padding | Specifies the amount of extra space to add around the outside |
394 | | of the notebook. The padding is a list of up to four length |
395 | | specifications: left top right bottom. If fewer than four |
396 | | elements are specified, bottom defaults to top, right defaults |
397 | | to left, and top defaults to left. |
398 +---------+----------------------------------------------------------------+
399 | width | If present and greater than zero, specifies the desired width |
400 | | of the pane area (not including internal padding). Otherwise, |
401 | | the maximum width of all panes is used. |
402 +---------+----------------------------------------------------------------+
408 There are also specific options for tabs:
410 +-----------+--------------------------------------------------------------+
411 | option | description |
412 +===========+==============================================================+
413 | state | Either "normal", "disabled" or "hidden". If "disabled", then |
414 | | the tab is not selectable. If "hidden", then the tab is not |
416 +-----------+--------------------------------------------------------------+
417 | sticky | Specifies how the child window is positioned within the pane |
418 | | area. Value is a string containing zero or more of the |
419 | | characters "n", "s", "e" or "w". Each letter refers to a |
420 | | side (north, south, east or west) that the child window will |
421 | | stick to, as per the :meth:`grid` geometry manager. |
422 +-----------+--------------------------------------------------------------+
423 | padding | Specifies the amount of extra space to add between the |
424 | | notebook and this pane. Syntax is the same as for the option |
425 | | padding used by this widget. |
426 +-----------+--------------------------------------------------------------+
427 | text | Specifies a text to be displayed in the tab. |
428 +-----------+--------------------------------------------------------------+
429 | image | Specifies an image to display in the tab. See the option |
430 | | image described in :class:`Widget`. |
431 +-----------+--------------------------------------------------------------+
432 | compound | Specifies how to display the image relative to the text, in |
433 | | the case both text and image options are present. See |
434 | | `Label Options`_ for legal values. |
435 +-----------+--------------------------------------------------------------+
436 | underline | Specifies the index (0-based) of a character to underline in |
437 | | the text string. The underlined character is used for |
438 | | mnemonic activation if :meth:`Notebook.enable_traversal` is |
440 +-----------+--------------------------------------------------------------+
446 The *tab_id* present in several methods of :class:`ttk.Notebook` may take any
447 of the following forms:
449 * An integer between zero and the number of tabs.
450 * The name of a child window.
451 * A positional specification of the form "@x,y", which identifies the tab.
452 * The literal string "current", which identifies the currently-selected tab.
453 * The literal string "end", which returns the number of tabs (only valid for
454 :meth:`Notebook.index`).
460 This widget generates a **<<NotebookTabChanged>>** virtual event after a new
469 .. method:: add(child, **kw)
471 Adds a new tab to the notebook.
473 If window is currently managed by the notebook but hidden, it is
474 restored to its previous position.
476 See `Tab Options`_ for the list of available options.
479 .. method:: forget(tab_id)
481 Removes the tab specified by *tab_id*, unmaps and unmanages the
485 .. method:: hide(tab_id)
487 Hides the tab specified by *tab_id*.
489 The tab will not be displayed, but the associated window remains
490 managed by the notebook and its configuration remembered. Hidden tabs
491 may be restored with the :meth:`add` command.
494 .. method:: identify(x, y)
496 Returns the name of the tab element at position *x*, *y*, or the empty
500 .. method:: index(tab_id)
502 Returns the numeric index of the tab specified by *tab_id*, or the total
503 number of tabs if *tab_id* is the string "end".
506 .. method:: insert(pos, child, **kw)
508 Inserts a pane at the specified position.
510 *pos* is either the string "end", an integer index, or the name of a
511 managed child. If *child* is already managed by the notebook, moves it to
512 the specified position.
514 See `Tab Options`_ for the list of available options.
517 .. method:: select([tab_id])
519 Selects the specified *tab_id*.
521 The associated child window will be displayed, and the
522 previously-selected window (if different) is unmapped. If *tab_id* is
523 omitted, returns the widget name of the currently selected pane.
526 .. method:: tab(tab_id[, option=None[, **kw]])
528 Query or modify the options of the specific *tab_id*.
530 If *kw* is not given, returns a dictionary of the tab option values. If
531 *option* is specified, returns the value of that *option*. Otherwise,
532 sets the options to the corresponding values.
537 Returns a list of windows managed by the notebook.
540 .. method:: enable_traversal()
542 Enable keyboard traversal for a toplevel window containing this notebook.
544 This will extend the bindings for the toplevel window containing the
547 * Control-Tab: selects the tab following the currently selected one.
548 * Shift-Control-Tab: selects the tab preceding the currently selected one.
549 * Alt-K: where K is the mnemonic (underlined) character of any tab, will
552 Multiple notebooks in a single toplevel may be enabled for traversal,
553 including nested notebooks. However, notebook traversal only works
554 properly if all panes have the notebook they are in as master.
560 The :class:`ttk.Progressbar` widget shows the status of a long-running
561 operation. It can operate in two modes: determinate mode shows the amount
562 completed relative to the total amount of work to be done, and indeterminate
563 mode provides an animated display to let the user know that something is
570 This widget accepts the following specific options:
572 +----------+---------------------------------------------------------------+
573 | option | description |
574 +==========+===============================================================+
575 | orient | One of "horizontal" or "vertical". Specifies the orientation |
576 | | of the progress bar. |
577 +----------+---------------------------------------------------------------+
578 | length | Specifies the length of the long axis of the progress bar |
579 | | (width if horizontal, height if vertical). |
580 +----------+---------------------------------------------------------------+
581 | mode | One of "determinate" or "indeterminate". |
582 +----------+---------------------------------------------------------------+
583 | maximum | A number specifying the maximum value. Defaults to 100. |
584 +----------+---------------------------------------------------------------+
585 | value | The current value of the progress bar. In "determinate" mode, |
586 | | this represents the amount of work completed. In |
587 | | "indeterminate" mode, it is interpreted as modulo *maximum*; |
588 | | that is, the progress bar completes one "cycle" when its value|
589 | | increases by *maximum*. |
590 +----------+---------------------------------------------------------------+
591 | variable | A name which is linked to the option value. If specified, the |
592 | | value of the progress bar is automatically set to the value of|
593 | | this name whenever the latter is modified. |
594 +----------+---------------------------------------------------------------+
595 | phase | Read-only option. The widget periodically increments the value|
596 | | of this option whenever its value is greater than 0 and, in |
597 | | determinate mode, less than maximum. This option may be used |
598 | | by the current theme to provide additional animation effects. |
599 +----------+---------------------------------------------------------------+
605 .. class:: Progressbar
607 .. method:: start([interval])
609 Begin autoincrement mode: schedules a recurring timer event that calls
610 :meth:`Progressbar.step` every *interval* milliseconds. If omitted,
611 *interval* defaults to 50 milliseconds.
614 .. method:: step([amount])
616 Increments the progress bar's value by *amount*.
618 *amount* defaults to 1.0 if omitted.
623 Stop autoincrement mode: cancels any recurring timer event initiated by
624 :meth:`Progressbar.start` for this progress bar.
630 The :class:`ttk.Separator` widget displays a horizontal or vertical separator
633 It has no other methods besides the ones inherited from :class:`ttk.Widget`.
639 This widget accepts the following specific option:
641 +--------+----------------------------------------------------------------+
642 | option | description |
643 +========+================================================================+
644 | orient | One of "horizontal" or "vertical". Specifies the orientation of|
646 +--------+----------------------------------------------------------------+
652 The :class:`ttk.Sizegrip` widget (also known as a grow box) allows the user to
653 resize the containing toplevel window by pressing and dragging the grip.
655 This widget has neither specific options nor specific methods, besides the
656 ones inherited from :class:`ttk.Widget`.
659 Platform-specific notes
660 ^^^^^^^^^^^^^^^^^^^^^^^
662 * On Mac OS X, toplevel windows automatically include a built-in size grip
663 by default. Adding a :class:`Sizegrip` is harmless, since the built-in
664 grip will just mask the widget.
670 * If the containing toplevel's position was specified relative to the right
671 or bottom of the screen (e.g. ....), the :class:`Sizegrip` widget will
672 not resize the window.
673 * This widget supports only "southeast" resizing.
679 The :class:`ttk.Treeview` widget displays a hierarchical collection of items.
680 Each item has a textual label, an optional image, and an optional list of data
681 values. The data values are displayed in successive columns after the tree
684 The order in which data values are displayed may be controlled by setting
685 the widget option ``displaycolumns``. The tree widget can also display column
686 headings. Columns may be accessed by number or symbolic names listed in the
687 widget option columns. See `Column Identifiers`_.
689 Each item is identified by an unique name. The widget will generate item IDs
690 if they are not supplied by the caller. There is a distinguished root item,
691 named ``{}``. The root item itself is not displayed; its children appear at the
692 top level of the hierarchy.
694 Each item also has a list of tags, which can be used to associate event bindings
695 with individual items and control the appearance of the item.
697 The Treeview widget supports horizontal and vertical scrolling, according to
698 the options described in `Scrollable Widget Options`_ and the methods
699 :meth:`Treeview.xview` and :meth:`Treeview.yview`.
705 This widget accepts the following specific options:
707 .. tabularcolumns:: |p{0.2\textwidth}|p{0.7\textwidth}|
710 +----------------+--------------------------------------------------------+
711 | option | description |
712 +================+========================================================+
713 | columns | A list of column identifiers, specifying the number of |
714 | | columns and their names. |
715 +----------------+--------------------------------------------------------+
716 | displaycolumns | A list of column identifiers (either symbolic or |
717 | | integer indices) specifying which data columns are |
718 | | displayed and the order in which they appear, or the |
720 +----------------+--------------------------------------------------------+
721 | height | Specifies the number of rows which should be visible. |
722 | | Note: the requested width is determined from the sum |
723 | | of the column widths. |
724 +----------------+--------------------------------------------------------+
725 | padding | Specifies the internal padding for the widget. The |
726 | | padding is a list of up to four length specifications. |
727 +----------------+--------------------------------------------------------+
728 | selectmode | Controls how the built-in class bindings manage the |
729 | | selection. One of "extended", "browse" or "none". |
730 | | If set to "extended" (the default), multiple items may |
731 | | be selected. If "browse", only a single item will be |
732 | | selected at a time. If "none", the selection will not |
735 | | Note that the application code and tag bindings can set|
736 | | the selection however they wish, regardless of the |
737 | | value of this option. |
738 +----------------+--------------------------------------------------------+
739 | show | A list containing zero or more of the following values,|
740 | | specifying which elements of the tree to display. |
742 | | * tree: display tree labels in column #0. |
743 | | * headings: display the heading row. |
745 | | The default is "tree headings", i.e., show all |
748 | | **Note**: Column #0 always refers to the tree column, |
749 | | even if show="tree" is not specified. |
750 +----------------+--------------------------------------------------------+
756 The following item options may be specified for items in the insert and item
759 +--------+---------------------------------------------------------------+
760 | option | description |
761 +========+===============================================================+
762 | text | The textual label to display for the item. |
763 +--------+---------------------------------------------------------------+
764 | image | A Tk Image, displayed to the left of the label. |
765 +--------+---------------------------------------------------------------+
766 | values | The list of values associated with the item. |
768 | | Each item should have the same number of values as the widget |
769 | | option columns. If there are fewer values than columns, the |
770 | | remaining values are assumed empty. If there are more values |
771 | | than columns, the extra values are ignored. |
772 +--------+---------------------------------------------------------------+
773 | open | True/False value indicating whether the item's children should|
774 | | be displayed or hidden. |
775 +--------+---------------------------------------------------------------+
776 | tags | A list of tags associated with this item. |
777 +--------+---------------------------------------------------------------+
783 The following options may be specified on tags:
785 +------------+-----------------------------------------------------------+
786 | option | description |
787 +============+===========================================================+
788 | foreground | Specifies the text foreground color. |
789 +------------+-----------------------------------------------------------+
790 | background | Specifies the cell or item background color. |
791 +------------+-----------------------------------------------------------+
792 | font | Specifies the font to use when drawing text. |
793 +------------+-----------------------------------------------------------+
794 | image | Specifies the item image, in case the item's image option |
796 +------------+-----------------------------------------------------------+
802 Column identifiers take any of the following forms:
804 * A symbolic name from the list of columns option.
805 * An integer n, specifying the nth data column.
806 * A string of the form #n, where n is an integer, specifying the nth display
811 * Item's option values may be displayed in a different order than the order
812 in which they are stored.
813 * Column #0 always refers to the tree column, even if show="tree" is not
816 A data column number is an index into an item's option values list; a display
817 column number is the column number in the tree where the values are displayed.
818 Tree labels are displayed in column #0. If option displaycolumns is not set,
819 then data column n is displayed in column #n+1. Again, **column #0 always
820 refers to the tree column**.
826 The Treeview widget generates the following virtual events.
828 +--------------------+--------------------------------------------------+
829 | event | description |
830 +====================+==================================================+
831 | <<TreeviewSelect>> | Generated whenever the selection changes. |
832 +--------------------+--------------------------------------------------+
833 | <<TreeviewOpen>> | Generated just before settings the focus item to |
835 +--------------------+--------------------------------------------------+
836 | <<TreeviewClose>> | Generated just after setting the focus item to |
838 +--------------------+--------------------------------------------------+
840 The :meth:`Treeview.focus` and :meth:`Treeview.selection` methods can be used
841 to determine the affected item or items.
849 .. method:: bbox(item[, column=None])
851 Returns the bounding box (relative to the treeview widget's window) of
852 the specified *item* in the form (x, y, width, height).
854 If *column* is specified, returns the bounding box of that cell. If the
855 *item* is not visible (i.e., if it is a descendant of a closed item or is
856 scrolled offscreen), returns an empty string.
859 .. method:: get_children([item])
861 Returns the list of children belonging to *item*.
863 If *item* is not specified, returns root children.
866 .. method:: set_children(item, *newchildren)
868 Replaces *item*'s child with *newchildren*.
870 Children present in *item* that are not present in *newchildren* are
871 detached from the tree. No items in *newchildren* may be an ancestor of
872 *item*. Note that not specifying *newchildren* results in detaching
876 .. method:: column(column[, option=None[, **kw]])
878 Query or modify the options for the specified *column*.
880 If *kw* is not given, returns a dict of the column option values. If
881 *option* is specified then the value for that *option* is returned.
882 Otherwise, sets the options to the corresponding values.
884 The valid options/values are:
887 Returns the column name. This is a read-only option.
888 * anchor: One of the standard Tk anchor values.
889 Specifies how the text in this column should be aligned with respect
892 The minimum width of the column in pixels. The treeview widget will
893 not make the column any smaller than specified by this option when
894 the widget is resized or the user drags a column.
895 * stretch: True/False
896 Specifies whether the column's width should be adjusted when
897 the widget is resized.
899 The width of the column in pixels.
901 To configure the tree column, call this with column = "#0"
903 .. method:: delete(*items)
905 Delete all specified *items* and all their descendants.
907 The root item may not be deleted.
910 .. method:: detach(*items)
912 Unlinks all of the specified *items* from the tree.
914 The items and all of their descendants are still present, and may be
915 reinserted at another point in the tree, but will not be displayed.
917 The root item may not be detached.
920 .. method:: exists(item)
922 Returns True if the specified *item* is present in the tree.
925 .. method:: focus([item=None])
927 If *item* is specified, sets the focus item to *item*. Otherwise, returns
928 the current focus item, or '' if there is none.
931 .. method:: heading(column[, option=None[, **kw]])
933 Query or modify the heading options for the specified *column*.
935 If *kw* is not given, returns a dict of the heading option values. If
936 *option* is specified then the value for that *option* is returned.
937 Otherwise, sets the options to the corresponding values.
939 The valid options/values are:
942 The text to display in the column heading.
944 Specifies an image to display to the right of the column heading.
946 Specifies how the heading text should be aligned. One of the standard
949 A callback to be invoked when the heading label is pressed.
951 To configure the tree column heading, call this with column = "#0".
954 .. method:: identify(component, x, y)
956 Returns a description of the specified *component* under the point given
957 by *x* and *y*, or the empty string if no such *component* is present at
961 .. method:: identify_row(y)
963 Returns the item ID of the item at position *y*.
966 .. method:: identify_column(x)
968 Returns the data column identifier of the cell at position *x*.
970 The tree column has ID #0.
973 .. method:: identify_region(x, y)
977 +-----------+--------------------------------------+
979 +===========+======================================+
980 | heading | Tree heading area. |
981 +-----------+--------------------------------------+
982 | separator | Space between two columns headings. |
983 +-----------+--------------------------------------+
984 | tree | The tree area. |
985 +-----------+--------------------------------------+
986 | cell | A data cell. |
987 +-----------+--------------------------------------+
989 Availability: Tk 8.6.
992 .. method:: identify_element(x, y)
994 Returns the element at position *x*, *y*.
996 Availability: Tk 8.6.
999 .. method:: index(item)
1001 Returns the integer index of *item* within its parent's list of children.
1004 .. method:: insert(parent, index[, iid=None[, **kw]])
1006 Creates a new item and returns the item identifier of the newly created
1009 *parent* is the item ID of the parent item, or the empty string to create
1010 a new top-level item. *index* is an integer, or the value "end",
1011 specifying where in the list of parent's children to insert the new item.
1012 If *index* is less than or equal to zero, the new node is inserted at
1013 the beginning; if *index* is greater than or equal to the current number
1014 of children, it is inserted at the end. If *iid* is specified, it is used
1015 as the item identifier; *iid* must not already exist in the tree.
1016 Otherwise, a new unique identifier is generated.
1018 See `Item Options`_ for the list of available points.
1021 .. method:: item(item[, option[, **kw]])
1023 Query or modify the options for the specified *item*.
1025 If no options are given, a dict with options/values for the item is
1027 If *option* is specified then the value for that option is returned.
1028 Otherwise, sets the options to the corresponding values as given by *kw*.
1031 .. method:: move(item, parent, index)
1033 Moves *item* to position *index* in *parent*'s list of children.
1035 It is illegal to move an item under one of its descendants. If *index* is
1036 less than or equal to zero, *item* is moved to the beginning; if greater
1037 than or equal to the number of children, it is moved to the end. If *item*
1038 was detached it is reattached.
1041 .. method:: next(item)
1043 Returns the identifier of *item*'s next sibling, or '' if *item* is the
1044 last child of its parent.
1047 .. method:: parent(item)
1049 Returns the ID of the parent of *item*, or '' if *item* is at the top
1050 level of the hierarchy.
1053 .. method:: prev(item)
1055 Returns the identifier of *item*'s previous sibling, or '' if *item* is
1056 the first child of its parent.
1059 .. method:: reattach(item, parent, index)
1061 An alias for :meth:`Treeview.move`.
1064 .. method:: see(item)
1066 Ensure that *item* is visible.
1068 Sets all of *item*'s ancestors open option to True, and scrolls the
1069 widget if necessary so that *item* is within the visible portion of
1073 .. method:: selection([selop=None[, items=None]])
1075 If *selop* is not specified, returns selected items. Otherwise, it will
1076 act according to the following selection methods.
1079 .. method:: selection_set(items)
1081 *items* becomes the new selection.
1084 .. method:: selection_add(items)
1086 Add *items* to the selection.
1089 .. method:: selection_remove(items)
1091 Remove *items* from the selection.
1094 .. method:: selection_toggle(items)
1096 Toggle the selection state of each item in *items*.
1099 .. method:: set(item[, column=None[, value=None]])
1101 With one argument, returns a dictionary of column/value pairs for the
1102 specified *item*. With two arguments, returns the current value of the
1103 specified *column*. With three arguments, sets the value of given
1104 *column* in given *item* to the specified *value*.
1107 .. method:: tag_bind(tagname[, sequence=None[, callback=None]])
1109 Bind a callback for the given event *sequence* to the tag *tagname*.
1110 When an event is delivered to an item, the callbacks for each of the
1111 item's tags option are called.
1114 .. method:: tag_configure(tagname[, option=None[, **kw]])
1116 Query or modify the options for the specified *tagname*.
1118 If *kw* is not given, returns a dict of the option settings for
1119 *tagname*. If *option* is specified, returns the value for that *option*
1120 for the specified *tagname*. Otherwise, sets the options to the
1121 corresponding values for the given *tagname*.
1124 .. method:: tag_has(tagname[, item])
1126 If *item* is specified, returns 1 or 0 depending on whether the specified
1127 *item* has the given *tagname*. Otherwise, returns a list of all items
1128 that have the specified tag.
1130 Availability: Tk 8.6
1133 .. method:: xview(*args)
1135 Query or modify horizontal position of the treeview.
1138 .. method:: yview(*args)
1140 Query or modify vertical position of the treeview.
1148 Each widget in :mod:`ttk` is assigned a style, which specifies the set of
1149 elements making up the widget and how they are arranged, along with dynamic and
1150 default settings for element options. By default the style name is the same as
1151 the widget's class name, but it may be overridden by the widget's style
1152 option. If the class name of a widget is unknown, use the method
1153 :meth:`Misc.winfo_class` (somewidget.winfo_class()).
1157 `Tcl'2004 conference presentation <http://tktable.sourceforge.net/tile/tile-tcl2004.pdf>`_
1158 This document explains how the theme engine works
1163 This class is used to manipulate the style database.
1166 .. method:: configure(style, query_opt=None, **kw)
1168 Query or set the default value of the specified option(s) in *style*.
1170 Each key in *kw* is an option and each value is a string identifying
1171 the value for that option.
1173 For example, to change every default button to be a flat button with some
1174 padding and a different background color do::
1181 ttk.Style().configure("TButton", padding=6, relief="flat",
1184 btn = ttk.Button(text="Sample")
1190 .. method:: map(style, query_opt=None, **kw)
1192 Query or sets dynamic values of the specified option(s) in *style*.
1194 Each key in *kw* is an option and each value should be a list or a
1195 tuple (usually) containing statespecs grouped in tuples, lists, or
1196 something else of your preference. A statespec is a compound of one
1197 or more states and then a value.
1207 style.map("C.TButton",
1208 foreground=[('pressed', 'red'), ('active', 'blue')],
1209 background=[('pressed', '!disabled', 'black'), ('active', 'white')]
1212 colored_btn = ttk.Button(text="Test", style="C.TButton").pack()
1217 Note that the order of the (states, value) sequences for an
1218 option matters. In the previous example, if you change the
1219 order to ``[('active', 'blue'), ('pressed', 'red')]`` in the
1220 foreground option, for example, you would get a blue foreground
1221 when the widget is in the active or pressed states.
1223 .. method:: lookup(style, option[, state=None[, default=None]])
1225 Returns the value specified for *option* in *style*.
1227 If *state* is specified, it is expected to be a sequence of one or more
1228 states. If the *default* argument is set, it is used as a fallback value
1229 in case no specification for option is found.
1231 To check what font a Button uses by default, do::
1235 print ttk.Style().lookup("TButton", "font")
1238 .. method:: layout(style[, layoutspec=None])
1240 Define the widget layout for given *style*. If *layoutspec* is omitted,
1241 return the layout specification for given style.
1243 *layoutspec*, if specified, is expected to be a list or some other
1244 sequence type (excluding strings), where each item should be a tuple and
1245 the first item is the layout name and the second item should have the
1246 format described described in `Layouts`_.
1248 To understand the format, see the following example (it is not
1249 intended to do anything useful)::
1257 style.layout("TMenubutton", [
1258 ("Menubutton.background", None),
1259 ("Menubutton.button", {"children":
1260 [("Menubutton.focus", {"children":
1261 [("Menubutton.padding", {"children":
1262 [("Menubutton.label", {"side": "left", "expand": 1})]
1268 mbtn = ttk.Menubutton(text='Text')
1273 .. method:: element_create(elementname, etype, *args, **kw)
1275 Create a new element in the current theme, of the given *etype* which is
1276 expected to be either "image", "from" or "vsapi". The latter is only
1277 available in Tk 8.6a for Windows XP and Vista and is not described here.
1279 If "image" is used, *args* should contain the default image name followed
1280 by statespec/value pairs (this is the imagespec), and *kw* may have the
1284 padding is a list of up to four integers, specifying the left, top,
1285 right, and bottom borders, respectively.
1288 Specifies a minimum height for the element. If less than zero, the
1289 base image's height is used as a default.
1292 Specifies the element's interior padding. Defaults to border's value
1296 Specifies how the image is placed within the final parcel. spec
1297 contains zero or more characters “n”, “s”, “w”, or “e”.
1300 Specifies a minimum width for the element. If less than zero, the
1301 base image's width is used as a default.
1303 If "from" is used as the value of *etype*,
1304 :meth:`element_create` will clone an existing
1305 element. *args* is expected to contain a themename, from which
1306 the element will be cloned, and optionally an element to clone from.
1307 If this element to clone from is not specified, an empty element will
1308 be used. *kw* is discarded.
1311 .. method:: element_names()
1313 Returns the list of elements defined in the current theme.
1316 .. method:: element_options(elementname)
1318 Returns the list of *elementname*'s options.
1321 .. method:: theme_create(themename[, parent=None[, settings=None]])
1325 It is an error if *themename* already exists. If *parent* is specified,
1326 the new theme will inherit styles, elements and layouts from the parent
1327 theme. If *settings* are present they are expected to have the same
1328 syntax used for :meth:`theme_settings`.
1331 .. method:: theme_settings(themename, settings)
1333 Temporarily sets the current theme to *themename*, apply specified
1334 *settings* and then restore the previous theme.
1336 Each key in *settings* is a style and each value may contain the keys
1337 'configure', 'map', 'layout' and 'element create' and they are expected
1338 to have the same format as specified by the methods
1339 :meth:`Style.configure`, :meth:`Style.map`, :meth:`Style.layout` and
1340 :meth:`Style.element_create` respectively.
1342 As an example, let's change the Combobox for the default theme a bit::
1350 style.theme_settings("default", {
1352 "configure": {"padding": 5},
1354 "background": [("active", "green2"),
1355 ("!disabled", "green4")],
1356 "fieldbackground": [("!disabled", "green3")],
1357 "foreground": [("focus", "OliveDrab1"),
1358 ("!disabled", "OliveDrab2")]
1363 combo = ttk.Combobox().pack()
1368 .. method:: theme_names()
1370 Returns a list of all known themes.
1373 .. method:: theme_use([themename])
1375 If *themename* is not given, returns the theme in use. Otherwise, sets
1376 the current theme to *themename*, refreshes all widgets and emits a
1377 <<ThemeChanged>> event.
1383 A layout can be just None, if it takes no options, or a dict of
1384 options specifying how to arrange the element. The layout mechanism
1385 uses a simplified version of the pack geometry manager: given an
1386 initial cavity, each element is allocated a parcel. Valid
1390 Specifies which side of the cavity to place the element; one of
1391 top, right, bottom or left. If omitted, the element occupies the
1395 Specifies where the element is placed inside its allocated parcel.
1398 If set to 1, causes the element and all of its descendants to be treated as
1399 a single element for the purposes of :meth:`Widget.identify` et al. It's
1400 used for things like scrollbar thumbs with grips.
1402 * children: [sublayout... ]
1403 Specifies a list of elements to place inside the element. Each
1404 element is a tuple (or other sequence type) where the first item is
1405 the layout name, and the other is a `Layout`_.
1407 .. _Layout: `Layouts`_