Tkinter 8.5 reference: a GUI for Python |  |
Tkinter 8.5 reference: a GUI for Python | |
This widget is the ttk version of Section 9, “The Checkbutton widget”. To create a ttk.Checkbutton widget as the child of a given parent
w= ttk.Checkbutton(parent,option=value, ...)
Here are the options for the ttk.Checkbutton
widget. Compare these to the Tkinter version discussed in Section 7, “The Button widget”.
Table 37. ttk.Checkbutton options
class_
| The widget class name. This may be specified when the widget is created, but cannot be changed later. For an explanation of widget classes, see Section 27, “Standardizing appearance”. |
command
| A function to be called whenever the state of this checkbutton changes. |
compound
|
This option specifies the relative position of the image
relative to the text when you specify both. The value
may be tk.TOP (image above text), tk.BOTTOM (image below text), tk.LEFT (image to the left of the text), or
tk.RIGHT (image to the right of the
text). If you provide both image and
text options but do not specify a value
for compound, only the image will appear.
|
cursor
| The cursor that will appear when the mouse is over the checkbutton; see Section 5.8, “Cursors”. |
image
| An image to appear on the checkbutton; see Section 5.9, “Images”. |
offvalue
|
By default, when a checkbutton is in the off (unchecked)
state, the value of the associated variable is 0. You can use the offvalue option
to specify a different value for the off state.
|
onvalue
|
By default, when a checkbutton is in the on (checked)
state, the value of the associated variable is 1. You can use the onvalue option
to specify a different value for the on state.
|
style
| The style to be used in rendering this checkbutton; see Section 49, “Using and customizing ttk styles”. |
takefocus
|
By default, a ttk.Checkbutton will
be included in focus traversal; see Section 53, “Focus: routing keyboard input”. To remove the widget from focus
traversal, use takefocus=False.
|
text
| The text to appear on the checkbutton, as a string. |
textvariable
| A variable that controls the text that appears on the checkbutton; see Section 52, “Control variables: the values behind the widgets”. |
underline
|
If this option has a nonnegative value n, an underline will appear under
the text character at position n.
|
variable
|
A control variable that tracks the current state of the
checkbutton; see Section 52, “Control variables: the values behind the widgets”.
Normally you will use an IntVar here, and
the off and on values are 0 and 1, respectively.
However, you may use a different control variable type,
and specify the offvalue and onvalue options using values of that type.
|
width
|
Use this option to specify a fixed width or a minimum width. The value is specified in characters; a positive value sets a fixed width of that many average characters, while a negative width sets a minimum width.
For example, if an average character in the selected
font is 10 pixels wide, option
You may also specify a |
These options of the Tkinter Checkbutton widget
are not supported by the ttk.Checkbutton widget constructor:
Table 38. Tkinter Checkbutton options not in
ttk.Checkbutton
activebackground
|
Use a style map to control the background option; see Section 50.2, “ttk style maps: dynamic appearance
changes”.
|
activeforeground
|
Use a style map to control the foreground option.
|
anchor
|
Configure this option using a style; see Section 49, “Using and customizing ttk styles”. Use this option to
specify the position of the text when the
For example, if you specify options When a checkbutton displays an image but no text, this option is ignored. |
background or bg
|
Configure the background option using a
style. The bg abbreviation is not
supported.
|
bitmap
| Not supported. |
borderwidth or bd
| Configure this option using a style. |
disabledforeground
|
Use a style map for the foreground
option; see Section 50.2, “ttk style maps: dynamic appearance
changes”.
|
font
| Configure this option using a style. |
foreground or fg
| Configure this option using a style. |
height
| Not supported. |
highlightbackground
|
To control the color of the focus highlight when the
checkbutton does not have focus, use a style map to
control the highlightcolor option; see
Section 50.2, “ttk style maps: dynamic appearance
changes”.
|
highlightcolor
| You may specify the default focus highlight color by setting this option in a style. You may also control the focus highlight color using a style map. |
highlightthickness
| Configure this option using a style. This option may not work in all themes. |
indicatoron
| Not supported. |
justify
|
Controls how multiple lines are positioned
horizontally relative to each other. Configure
this option using a style; values may be tk.LEFT, tk.CENTER, or
tk.RIGHT for left-aligned, centered,
or right-aligned, respectively.
|
offrelief
| Not supported. |
overrelief
|
Use a style map to control the relief option; see Section 50.2, “ttk style maps: dynamic appearance
changes”.
|
padx
| Not supported. |
pady
| Not supported. |
relief
|
Use a style map to control the relief option; see Section 50.2, “ttk style maps: dynamic appearance
changes”.
|
selectcolor
| Not supported. |
selectimage
| Not supported. |
state
| In ttk, there is no option with this name. The state mechanism has been generalized; see Section 50.2, “ttk style maps: dynamic appearance changes”. |
wraplength
|
If you use a style that has this option set to some
dimension, the text will be sliced into pieces no longer than
that dimension.
|
Methods on a ttk.Checkbutton include all
those described in Section 46, “Methods common to all ttk widgets”, plus:
.invoke()
This method toggles the state of the checkbutton. If
there is a command callback, it calls that
callback, and returns whatever value the callback
returned.
Not supported are the following methods of the Tkinter Checkbutton widget: .deselect(), .flash(), .select(), and .toggle(). To change the state of a checkbutton
through program control, use the .set() method of
the associated control variable.