294 lines
12 KiB
Plaintext
294 lines
12 KiB
Plaintext
'\"
|
|
'\" Copyright (c) 1990-1994 The Regents of the University of California.
|
|
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
|
|
'\"
|
|
'\" See the file "license.terms" for information on usage and redistribution
|
|
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
|
'\"
|
|
.TH checkbutton n 4.4 Tk "Tk Built-In Commands"
|
|
.so man.macros
|
|
.BS
|
|
'\" Note: do not modify the .SH NAME line immediately below!
|
|
.SH NAME
|
|
checkbutton \- Create and manipulate 'checkbutton' boolean selection widgets
|
|
.SH SYNOPSIS
|
|
\fBcheckbutton\fI pathName \fR?\fIoptions\fR?
|
|
.SO
|
|
\-activebackground \-disabledforeground \-padx
|
|
\-activeforeground \-font \-pady
|
|
\-anchor \-foreground \-relief
|
|
\-background \-highlightbackground \-takefocus
|
|
\-bitmap \-highlightcolor \-text
|
|
\-borderwidth \-highlightthickness \-textvariable
|
|
\-compound \-image \-underline
|
|
\-cursor \-justify \-wraplength
|
|
.SE
|
|
.SH "WIDGET-SPECIFIC OPTIONS"
|
|
.OP \-command command Command
|
|
Specifies a Tcl command to associate with the button. This command
|
|
is typically invoked when mouse button 1 is released over the button
|
|
window. The button's global variable (\fB\-variable\fR option) will
|
|
be updated before the command is invoked.
|
|
.OP \-height height Height
|
|
Specifies a desired height for the button.
|
|
If an image or bitmap is being displayed in the button then the value is in
|
|
screen units (i.e. any of the forms acceptable to \fBTk_GetPixels\fR);
|
|
for text it is in lines of text.
|
|
If this option is not specified, the button's desired height is computed
|
|
from the size of the image or bitmap or text being displayed in it.
|
|
.OP \-indicatoron indicatorOn IndicatorOn
|
|
Specifies whether or not the indicator should be drawn. Must be a
|
|
proper boolean value. If false, the \fB\-relief\fR option is
|
|
ignored and the widget's relief is always sunken if the widget is
|
|
selected and raised otherwise.
|
|
.OP \-offrelief offRelief OffRelief
|
|
Specifies the relief for the checkbutton when the indicator is not drawn and
|
|
the checkbutton is off. The default value is
|
|
.QW raised .
|
|
By setting this option to
|
|
.QW flat
|
|
and setting \fB\-indicatoron\fR to false and \fB\-overrelief\fR to
|
|
.QW raised ,
|
|
the effect is achieved
|
|
of having a flat button that raises on mouse-over and which is
|
|
depressed when activated. This is the behavior typically exhibited by
|
|
the Bold, Italic, and Underline checkbuttons on the toolbar of a
|
|
word-processor, for example.
|
|
.OP \-offvalue offValue Value
|
|
Specifies value to store in the button's associated variable whenever
|
|
this button is deselected. Defaults to
|
|
.QW 0 .
|
|
.OP \-onvalue onValue Value
|
|
Specifies value to store in the button's associated variable whenever
|
|
this button is selected. Defaults to
|
|
.QW 1 .
|
|
.OP \-overrelief overRelief OverRelief
|
|
Specifies an alternative relief for the checkbutton, to be used when the
|
|
mouse cursor is over the widget. This option can be used to make
|
|
toolbar buttons, by configuring \fB\-relief flat \-overrelief
|
|
raised\fR. If the value of this option is the empty string, then no
|
|
alternative relief is used when the mouse cursor is over the checkbutton.
|
|
The empty string is the default value.
|
|
.OP \-selectcolor selectColor Background
|
|
Specifies a background color to use when the button is selected.
|
|
If \fBindicatorOn\fR is true then the color is used as the background for
|
|
the indicator regardless of the select state.
|
|
If \fBindicatorOn\fR is false, this color is used as the background
|
|
for the entire widget, in place of \fBbackground\fR or \fBactiveBackground\fR,
|
|
whenever the widget is selected.
|
|
If specified as an empty string then no special color is used for
|
|
displaying when the widget is selected.
|
|
.OP \-selectimage selectImage SelectImage
|
|
Specifies an image to display (in place of the \fB\-image\fR option)
|
|
when the checkbutton is selected.
|
|
This option is ignored unless the \fB\-image\fR option has been
|
|
specified.
|
|
.OP \-state state State
|
|
Specifies one of three states for the checkbutton: \fBnormal\fR, \fBactive\fR,
|
|
or \fBdisabled\fR. In normal state the checkbutton is displayed using the
|
|
\fB\-foreground\fR and \fB\-background\fR options. The active state is
|
|
typically used when the pointer is over the checkbutton. In active state
|
|
the checkbutton is displayed using the \fB\-activeforeground\fR and
|
|
\fB\-activebackground\fR options. Disabled state means that the checkbutton
|
|
should be insensitive: the default bindings will refuse to activate
|
|
the widget and will ignore mouse button presses.
|
|
In this state the \fB\-disabledforeground\fR and
|
|
\fB\-background\fR options determine how the checkbutton is displayed.
|
|
.OP \-tristateimage tristateImage TristateImage
|
|
Specifies an image to display (in place of the \fB\-image\fR option)
|
|
when the checkbutton is in tri-state mode.
|
|
This option is ignored unless the \fB\-image\fR option has been
|
|
specified.
|
|
.OP \-tristatevalue tristateValue Value
|
|
Specifies the value that causes the checkbutton to display the multi-value
|
|
selection, also known as the tri-state mode. Defaults to
|
|
.QW "" .
|
|
.OP \-variable variable Variable
|
|
Specifies the name of a global variable to set to indicate whether
|
|
or not this button is selected. Defaults to the name of the
|
|
button within its parent (i.e. the last element of the button
|
|
window's path name).
|
|
.OP \-width width Width
|
|
Specifies a desired width for the button.
|
|
If an image or bitmap is being displayed in the button then the value is in
|
|
screen units (i.e. any of the forms acceptable to \fBTk_GetPixels\fR);
|
|
for text it is in characters.
|
|
If this option is not specified, the button's desired width is computed
|
|
from the size of the image or bitmap or text being displayed in it.
|
|
.BE
|
|
.SH DESCRIPTION
|
|
.PP
|
|
The \fBcheckbutton\fR command creates a new window (given by the
|
|
\fIpathName\fR argument) and makes it into a checkbutton widget.
|
|
Additional
|
|
options, described above, may be specified on the command line
|
|
or in the option database
|
|
to configure aspects of the checkbutton such as its colors, font,
|
|
text, and initial relief. The \fBcheckbutton\fR command returns its
|
|
\fIpathName\fR argument. At the time this command is invoked,
|
|
there must not exist a window named \fIpathName\fR, but
|
|
\fIpathName\fR's parent must exist.
|
|
.PP
|
|
A checkbutton is a widget
|
|
that displays a textual string, bitmap or image
|
|
and a square called an \fIindicator\fR.
|
|
If text is displayed, it must all be in a single font, but it
|
|
can occupy multiple lines on the screen (if it contains newlines
|
|
or if wrapping occurs because of the \fB\-wraplength\fR option) and
|
|
one of the characters may optionally be underlined using the
|
|
\fB\-underline\fR option.
|
|
A checkbutton has
|
|
all of the behavior of a simple button, including the
|
|
following: it can display itself in either of three different
|
|
ways, according to the \fB\-state\fR option;
|
|
it can be made to appear
|
|
raised, sunken, or flat; it can be made to flash; and it invokes
|
|
a Tcl command whenever mouse button 1 is clicked over the
|
|
checkbutton.
|
|
.PP
|
|
In addition, checkbuttons can be \fIselected\fR.
|
|
If a checkbutton is selected then the indicator is normally
|
|
drawn with a selected appearance, and
|
|
a Tcl variable associated with the checkbutton is set to a particular
|
|
value (normally 1).
|
|
The indicator is drawn with a check mark inside.
|
|
If the checkbutton is not selected, then the indicator is drawn with a
|
|
deselected appearance, and the associated variable is
|
|
set to a different value (typically 0).
|
|
The indicator is drawn without a check mark inside. In the special case
|
|
where the variable (if specified) has a value that matches the tristatevalue,
|
|
the indicator is drawn with a tri-state appearance and is in the tri-state
|
|
mode indicating mixed or multiple values. (This is used when the check
|
|
box represents the state of multiple items.)
|
|
The indicator is drawn in a platform dependent manner. Under Unix and
|
|
Windows, the background interior of the box is
|
|
.QW grayed .
|
|
Under Mac, the indicator is drawn with a dash mark inside.
|
|
By default, the name of the variable associated with a checkbutton is the
|
|
same as the \fIname\fR used to create the checkbutton.
|
|
The variable name, and the
|
|
.QW on ,
|
|
.QW off
|
|
and
|
|
.QW tristate
|
|
values stored in it, may be modified with options on the command line
|
|
or in the option database.
|
|
Configuration options may also be used to modify the way the
|
|
indicator is displayed (or whether it is displayed at all).
|
|
By default a checkbutton is configured to select and deselect
|
|
itself on alternate button clicks.
|
|
In addition, each checkbutton monitors its associated variable and
|
|
automatically selects and deselects itself when the variables value
|
|
changes to and from the button's
|
|
.QW on ,
|
|
.QW off
|
|
and
|
|
.QW tristate
|
|
values.
|
|
.SH "WIDGET COMMAND"
|
|
.PP
|
|
The \fBcheckbutton\fR command creates a new Tcl command whose
|
|
name is \fIpathName\fR. This
|
|
command may be used to invoke various
|
|
operations on the widget. It has the following general form:
|
|
.CS
|
|
\fIpathName option \fR?\fIarg arg ...\fR?
|
|
.CE
|
|
\fIOption\fR and the \fIarg\fRs
|
|
determine the exact behavior of the command. The following
|
|
commands are possible for checkbutton widgets:
|
|
.TP
|
|
\fIpathName \fBcget\fR \fIoption\fR
|
|
Returns the current value of the configuration option given
|
|
by \fIoption\fR.
|
|
\fIOption\fR may have any of the values accepted by the \fBcheckbutton\fR
|
|
command.
|
|
.TP
|
|
\fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
|
|
Query or modify the configuration options of the widget.
|
|
If no \fIoption\fR is specified, returns a list describing all of
|
|
the available options for \fIpathName\fR (see \fBTk_ConfigureInfo\fR for
|
|
information on the format of this list). If \fIoption\fR is specified
|
|
with no \fIvalue\fR, 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 \fIoption\fR is specified). If
|
|
one or more \fIoption\-value\fR 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.
|
|
\fIOption\fR may have any of the values accepted by the \fBcheckbutton\fR
|
|
command.
|
|
.TP
|
|
\fIpathName \fBdeselect\fR
|
|
Deselects the checkbutton and sets the associated variable to its
|
|
.QW off
|
|
value.
|
|
.TP
|
|
\fIpathName \fBflash\fR
|
|
Flashes the checkbutton. This is accomplished by redisplaying the checkbutton
|
|
several times, alternating between active and normal colors. At
|
|
the end of the flash the checkbutton is left in the same normal/active
|
|
state as when the command was invoked.
|
|
This command is ignored if the checkbutton's state is \fBdisabled\fR.
|
|
.TP
|
|
\fIpathName \fBinvoke\fR
|
|
Does just what would have happened if the user invoked the checkbutton
|
|
with the mouse: toggle the selection state of the button and invoke
|
|
the Tcl command associated with the checkbutton, if there is one.
|
|
The return value is the return value from the Tcl command, or an
|
|
empty string if there is no command associated with the checkbutton.
|
|
This command is ignored if the checkbutton's state is \fBdisabled\fR.
|
|
.TP
|
|
\fIpathName \fBselect\fR
|
|
Selects the checkbutton and sets the associated variable to its
|
|
.QW on
|
|
value.
|
|
.TP
|
|
\fIpathName \fBtoggle\fR
|
|
Toggles the selection state of the button, redisplaying it and
|
|
modifying its associated variable to reflect the new state.
|
|
.SH BINDINGS
|
|
.PP
|
|
Tk automatically creates class bindings for checkbuttons that give them
|
|
the following default behavior:
|
|
.IP [1]
|
|
On Unix systems, a checkbutton activates whenever the mouse passes
|
|
over it and deactivates whenever the mouse leaves the checkbutton. On
|
|
Mac and Windows systems, when mouse button 1 is pressed over a
|
|
checkbutton, the button activates whenever the mouse pointer is inside
|
|
the button, and deactivates whenever the mouse pointer leaves the
|
|
button.
|
|
.IP [2]
|
|
When mouse button 1 is pressed over a checkbutton, it is invoked (its
|
|
selection state toggles and the command associated with the button is
|
|
invoked, if there is one).
|
|
.IP [3]
|
|
When a checkbutton has the input focus, the space key causes the checkbutton
|
|
to be invoked. Under Windows, there are additional key bindings; plus
|
|
(\fB+\fR) and equal (\fB=\fR) select the button, and minus (\fB\-\fR)
|
|
deselects the button.
|
|
.PP
|
|
If the checkbutton's state is \fBdisabled\fR then none of the above
|
|
actions occur: the checkbutton is completely non-responsive.
|
|
.PP
|
|
The behavior of checkbuttons can be changed by defining new bindings for
|
|
individual widgets or by redefining the class bindings.
|
|
.SH EXAMPLE
|
|
.PP
|
|
This example shows a group of uncoupled checkbuttons.
|
|
.PP
|
|
.CS
|
|
labelframe .lbl \-text "Steps:"
|
|
\fBcheckbutton\fR .c1 \-text Lights \-variable lights
|
|
\fBcheckbutton\fR .c2 \-text Cameras \-variable cameras
|
|
\fBcheckbutton\fR .c3 \-text Action! \-variable action
|
|
pack .c1 .c2 .c3 \-in .lbl
|
|
pack .lbl
|
|
.CE
|
|
.SH "SEE ALSO"
|
|
button(n), options(n), radiobutton(n), ttk::checkbutton(n)
|
|
.SH KEYWORDS
|
|
checkbutton, widget
|
|
'\" Local Variables:
|
|
'\" mode: nroff
|
|
'\" End:
|