320 lines
18 KiB
HTML
320 lines
18 KiB
HTML
<HTML><HEAD><TITLE>Tk Built-In Commands - checkbutton manual page</TITLE></HEAD><BODY>
|
|
<DL>
|
|
<DD><A HREF="checkbutton.htm#M2" NAME="L296">NAME</A>
|
|
<DL><DD>checkbutton - Create and manipulate checkbutton widgets</DL>
|
|
<DD><A HREF="checkbutton.htm#M3" NAME="L297">SYNOPSIS</A>
|
|
<DL>
|
|
<DD><B>checkbutton</B><I> pathName </I>?<I>options</I>?
|
|
</DL>
|
|
<DD><A HREF="checkbutton.htm#M4" NAME="L298">STANDARD OPTIONS</A>
|
|
<DL>
|
|
<DD><A HREF="options.htm#M-activebackground">-activebackground, activeBackground, Foreground</A>
|
|
<DD><A HREF="options.htm#M-activeforeground">-activeforeground, activeForeground, Background</A>
|
|
<DD><A HREF="options.htm#M-anchor">-anchor, anchor, Anchor</A>
|
|
<DD><A HREF="options.htm#M-background">-background or -bg, background, Background</A>
|
|
<DD><A HREF="options.htm#M-bitmap">-bitmap, bitmap, Bitmap</A>
|
|
<DD><A HREF="options.htm#M-borderwidth">-borderwidth or -bd, borderWidth, BorderWidth</A>
|
|
<DD><A HREF="options.htm#M-cursor">-cursor, cursor, Cursor</A>
|
|
<DD><A HREF="options.htm#M-disabledforeground">-disabledforeground, disabledForeground, DisabledForeground</A>
|
|
<DD><A HREF="options.htm#M-font">-font, font, Font</A>
|
|
<DD><A HREF="options.htm#M-foreground">-foreground or -fg, foreground, Foreground</A>
|
|
<DD><A HREF="options.htm#M-highlightbackground">-highlightbackground, highlightBackground, HighlightBackground</A>
|
|
<DD><A HREF="options.htm#M-highlightcolor">-highlightcolor, highlightColor, HighlightColor</A>
|
|
<DD><A HREF="options.htm#M-highlightthickness">-highlightthickness, highlightThickness, HighlightThickness</A>
|
|
<DD><A HREF="options.htm#M-image">-image, image, Image</A>
|
|
<DD><A HREF="options.htm#M-justify">-justify, justify, Justify</A>
|
|
<DD><A HREF="options.htm#M-padx">-padx, padX, Pad</A>
|
|
<DD><A HREF="options.htm#M-pady">-pady, padY, Pad</A>
|
|
<DD><A HREF="options.htm#M-relief">-relief, relief, Relief</A>
|
|
<DD><A HREF="options.htm#M-takefocus">-takefocus, takeFocus, TakeFocus</A>
|
|
<DD><A HREF="options.htm#M-text">-text, text, Text</A>
|
|
<DD><A HREF="options.htm#M-textvariable">-textvariable, textVariable, Variable</A>
|
|
<DD><A HREF="options.htm#M-underline">-underline, underline, Underline</A>
|
|
<DD><A HREF="options.htm#M-wraplength">-wraplength, wrapLength, WrapLength</A>
|
|
</DL>
|
|
<DD><A HREF="checkbutton.htm#M5" NAME="L299">WIDGET-SPECIFIC OPTIONS</A>
|
|
<DL>
|
|
<DD><A HREF="checkbutton.htm#M6" NAME="L300">-command, command, Command</A>
|
|
<DD><A HREF="checkbutton.htm#M7" NAME="L301">-height, height, Height</A>
|
|
<DD><A HREF="checkbutton.htm#M8" NAME="L302">-indicatoron, indicatorOn, IndicatorOn</A>
|
|
<DD><A HREF="checkbutton.htm#M9" NAME="L303">-offvalue, offValue, Value</A>
|
|
<DD><A HREF="checkbutton.htm#M10" NAME="L304">-onvalue, onValue, Value</A>
|
|
<DD><A HREF="checkbutton.htm#M11" NAME="L305">-selectcolor, selectColor, Background</A>
|
|
<DD><A HREF="checkbutton.htm#M12" NAME="L306">-selectimage, selectImage, SelectImage</A>
|
|
<DD><A HREF="checkbutton.htm#M13" NAME="L307">-state, state, State</A>
|
|
<DD><A HREF="checkbutton.htm#M14" NAME="L308">-variable, variable, Variable</A>
|
|
<DD><A HREF="checkbutton.htm#M15" NAME="L309">-width, width, Width</A>
|
|
</DL>
|
|
<DD><A HREF="checkbutton.htm#M16" NAME="L310">DESCRIPTION</A>
|
|
<DD><A HREF="checkbutton.htm#M17" NAME="L311">WIDGET COMMAND</A>
|
|
<DL>
|
|
<DD><A HREF="checkbutton.htm#M18" NAME="L312"><I>pathName </I><B>cget</B> <I>option</I></A>
|
|
<DD><A HREF="checkbutton.htm#M19" NAME="L313"><I>pathName </I><B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?</A>
|
|
<DD><A HREF="checkbutton.htm#M20" NAME="L314"><I>pathName </I><B>deselect</B></A>
|
|
<DD><A HREF="checkbutton.htm#M21" NAME="L315"><I>pathName </I><B>flash</B></A>
|
|
<DD><A HREF="checkbutton.htm#M22" NAME="L316"><I>pathName </I><B>invoke</B></A>
|
|
<DD><A HREF="checkbutton.htm#M23" NAME="L317"><I>pathName </I><B>select</B></A>
|
|
<DD><A HREF="checkbutton.htm#M24" NAME="L318"><I>pathName </I><B>toggle</B></A>
|
|
</DL>
|
|
<DD><A HREF="checkbutton.htm#M25" NAME="L319">BINDINGS</A>
|
|
<DL>
|
|
</DL>
|
|
<DD><A HREF="checkbutton.htm#M26" NAME="L320">KEYWORDS</A>
|
|
</DL><HR>
|
|
<H3><A NAME="M2">NAME</A></H3>
|
|
checkbutton - Create and manipulate checkbutton widgets
|
|
<H3><A NAME="M3">SYNOPSIS</A></H3>
|
|
<B>checkbutton</B><I> pathName </I>?<I>options</I>?<BR>
|
|
<H3><A NAME="M4">STANDARD OPTIONS</A></H3>
|
|
<DL>
|
|
<DT><B><A HREF="options.htm#M-activebackground">-activebackground, activeBackground, Foreground</A></B>
|
|
<DT><B><A HREF="options.htm#M-activeforeground">-activeforeground, activeForeground, Background</A></B>
|
|
<DT><B><A HREF="options.htm#M-anchor">-anchor, anchor, Anchor</A></B>
|
|
<DT><B><A HREF="options.htm#M-background">-background or -bg, background, Background</A></B>
|
|
<DT><B><A HREF="options.htm#M-bitmap">-bitmap, bitmap, Bitmap</A></B>
|
|
<DT><B><A HREF="options.htm#M-borderwidth">-borderwidth or -bd, borderWidth, BorderWidth</A></B>
|
|
<DT><B><A HREF="options.htm#M-cursor">-cursor, cursor, Cursor</A></B>
|
|
<DT><B><A HREF="options.htm#M-disabledforeground">-disabledforeground, disabledForeground, DisabledForeground</A></B>
|
|
<DT><B><A HREF="options.htm#M-font">-font, font, Font</A></B>
|
|
<DT><B><A HREF="options.htm#M-foreground">-foreground or -fg, foreground, Foreground</A></B>
|
|
<DT><B><A HREF="options.htm#M-highlightbackground">-highlightbackground, highlightBackground, HighlightBackground</A></B>
|
|
<DT><B><A HREF="options.htm#M-highlightcolor">-highlightcolor, highlightColor, HighlightColor</A></B>
|
|
<DT><B><A HREF="options.htm#M-highlightthickness">-highlightthickness, highlightThickness, HighlightThickness</A></B>
|
|
<DT><B><A HREF="options.htm#M-image">-image, image, Image</A></B>
|
|
<DT><B><A HREF="options.htm#M-justify">-justify, justify, Justify</A></B>
|
|
<DT><B><A HREF="options.htm#M-padx">-padx, padX, Pad</A></B>
|
|
<DT><B><A HREF="options.htm#M-pady">-pady, padY, Pad</A></B>
|
|
<DT><B><A HREF="options.htm#M-relief">-relief, relief, Relief</A></B>
|
|
<DT><B><A HREF="options.htm#M-takefocus">-takefocus, takeFocus, TakeFocus</A></B>
|
|
<DT><B><A HREF="options.htm#M-text">-text, text, Text</A></B>
|
|
<DT><B><A HREF="options.htm#M-textvariable">-textvariable, textVariable, Variable</A></B>
|
|
<DT><B><A HREF="options.htm#M-underline">-underline, underline, Underline</A></B>
|
|
<DT><B><A HREF="options.htm#M-wraplength">-wraplength, wrapLength, WrapLength</A></B>
|
|
</DL>
|
|
<H3><A NAME="M5">WIDGET-SPECIFIC OPTIONS</A></H3>
|
|
<DL>
|
|
<DT>Command-Line Name: <B><A NAME="M6">-command</A></B>
|
|
<DT>Database Name: <B>command</B>
|
|
<DT>Database Class: <B>Command</B>
|
|
<DD>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 (<B>-variable</B> option) will
|
|
be updated before the command is invoked.
|
|
<P><DT>Command-Line Name: <B><A NAME="M7">-height</A></B>
|
|
<DT>Database Name: <B>height</B>
|
|
<DT>Database Class: <B>Height</B>
|
|
<DD>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 <B><A HREF="../TclLib/GetPixels.htm">Tk_GetPixels</A></B>);
|
|
for text it is in lines of text.
|
|
If this option isn't specified, the button's desired height is computed
|
|
from the size of the image or bitmap or text being displayed in it.
|
|
<P><DT>Command-Line Name: <B><A NAME="M8">-indicatoron</A></B>
|
|
<DT>Database Name: <B>indicatorOn</B>
|
|
<DT>Database Class: <B>IndicatorOn</B>
|
|
<DD>Specifies whether or not the indicator should be drawn. Must be a
|
|
proper boolean value. If false, the <B>relief</B> option is
|
|
ignored and the widget's relief is always sunken if the widget is
|
|
selected and raised otherwise.
|
|
<P><DT>Command-Line Name: <B><A NAME="M9">-offvalue</A></B>
|
|
<DT>Database Name: <B>offValue</B>
|
|
<DT>Database Class: <B>Value</B>
|
|
<DD>Specifies value to store in the button's associated variable whenever
|
|
this button is deselected. Defaults to ``0''.
|
|
<P><DT>Command-Line Name: <B><A NAME="M10">-onvalue</A></B>
|
|
<DT>Database Name: <B>onValue</B>
|
|
<DT>Database Class: <B>Value</B>
|
|
<DD>Specifies value to store in the button's associated variable whenever
|
|
this button is selected. Defaults to ``1''.
|
|
<P><DT>Command-Line Name: <B><A NAME="M11">-selectcolor</A></B>
|
|
<DT>Database Name: <B>selectColor</B>
|
|
<DT>Database Class: <B>Background</B>
|
|
<DD>Specifies a background color to use when the button is selected.
|
|
If <B>indicatorOn</B> is true then the color applies to the indicator.
|
|
Under Windows, this color is used as the background for the indicator
|
|
regardless of the select state.
|
|
If <B>indicatorOn</B> is false, this color is used as the background
|
|
for the entire widget, in place of <B>background</B> or <B>activeBackground</B>,
|
|
whenever the widget is selected.
|
|
If specified as an empty string then no special color is used for
|
|
displaying when the widget is selected.
|
|
<P><DT>Command-Line Name: <B><A NAME="M12">-selectimage</A></B>
|
|
<DT>Database Name: <B>selectImage</B>
|
|
<DT>Database Class: <B>SelectImage</B>
|
|
<DD>Specifies an image to display (in place of the <B>image</B> option)
|
|
when the checkbutton is selected.
|
|
This option is ignored unless the <B>image</B> option has been
|
|
specified.
|
|
<P><DT>Command-Line Name: <B><A NAME="M13">-state</A></B>
|
|
<DT>Database Name: <B>state</B>
|
|
<DT>Database Class: <B>State</B>
|
|
<DD>Specifies one of three states for the checkbutton: <B>normal</B>, <B>active</B>,
|
|
or <B>disabled</B>. In normal state the checkbutton is displayed using the
|
|
<B>foreground</B> and <B>background</B> options. The active state is
|
|
typically used when the pointer is over the checkbutton. In active state
|
|
the checkbutton is displayed using the <B>activeForeground</B> and
|
|
<B>activeBackground</B> 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 <B>disabledForeground</B> and
|
|
<B>background</B> options determine how the checkbutton is displayed.
|
|
<P><DT>Command-Line Name: <B><A NAME="M14">-variable</A></B>
|
|
<DT>Database Name: <B><A HREF="../TkCmd/variable.htm">variable</A></B>
|
|
<DT>Database Class: <B><A HREF="../TkCmd/variable.htm">Variable</A></B>
|
|
<DD>Specifies name of 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).
|
|
<P><DT>Command-Line Name: <B><A NAME="M15">-width</A></B>
|
|
<DT>Database Name: <B>width</B>
|
|
<DT>Database Class: <B>Width</B>
|
|
<DD>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 <B><A HREF="../TclLib/GetPixels.htm">Tk_GetPixels</A></B>);
|
|
for text it is in characters.
|
|
If this option isn't specified, the button's desired width is computed
|
|
from the size of the image or bitmap or text being displayed in it.
|
|
</DL>
|
|
<H3><A NAME="M16">DESCRIPTION</A></H3>
|
|
The <B>checkbutton</B> command creates a new window (given by the
|
|
<I>pathName</I> 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 <B>checkbutton</B> command returns its
|
|
<I>pathName</I> argument. At the time this command is invoked,
|
|
there must not exist a window named <I>pathName</I>, but
|
|
<I>pathName</I>'s parent must exist.
|
|
<P>
|
|
A checkbutton is a widget
|
|
that displays a textual string, bitmap or image
|
|
and a square called an <I>indicator</I>.
|
|
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 <B>wrapLength</B> option) and
|
|
one of the characters may optionally be underlined using the
|
|
<B>underline</B> 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 <B>state</B> 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.
|
|
<P>
|
|
In addition, checkbuttons can be <I>selected</I>.
|
|
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).
|
|
Under Unix, the indicator is drawn with a sunken relief and a special
|
|
color. Under Windows, 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).
|
|
Under Unix, the indicator is drawn with a raised relief and no special
|
|
color. Under Windows, the indicator is drawn without a check mark inside.
|
|
By default, the name of the variable associated with a checkbutton is the
|
|
same as the <I>name</I> used to create the checkbutton.
|
|
The variable name, and the ``on'' and ``off'' 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 ``on'' value.
|
|
|
|
<H3><A NAME="M17">WIDGET COMMAND</A></H3>
|
|
The <B>checkbutton</B> command creates a new Tcl command whose
|
|
name is <I>pathName</I>. This
|
|
command may be used to invoke various
|
|
operations on the widget. It has the following general form:
|
|
<PRE><I>pathName option </I>?<I>arg arg ...</I>?</PRE>
|
|
<I>Option</I> and the <I>arg</I>s
|
|
determine the exact behavior of the command. The following
|
|
commands are possible for checkbutton widgets:
|
|
<P>
|
|
<DL>
|
|
<P><DT><A NAME="M18"><I>pathName </I><B>cget</B> <I>option</I></A><DD>
|
|
Returns the current value of the configuration option given
|
|
by <I>option</I>.
|
|
<I>Option</I> may have any of the values accepted by the <B>checkbutton</B>
|
|
command.
|
|
<P><DT><A NAME="M19"><I>pathName </I><B>configure</B> ?<I>option</I>? ?<I>value option value ...</I>?</A><DD>
|
|
Query or modify the configuration options of the widget.
|
|
If no <I>option</I> is specified, returns a list describing all of
|
|
the available options for <I>pathName</I> (see <B><A HREF="../TclLib/ConfigWidg.htm">Tk_ConfigureInfo</A></B> for
|
|
information on the format of this list). If <I>option</I> is specified
|
|
with no <I>value</I>, 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 <I>option</I> is specified). If
|
|
one or more <I>option-value</I> 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.
|
|
<I>Option</I> may have any of the values accepted by the <B>checkbutton</B>
|
|
command.
|
|
<P><DT><A NAME="M20"><I>pathName </I><B>deselect</B></A><DD>
|
|
Deselects the checkbutton and sets the associated variable to its ``off''
|
|
value.
|
|
<P><DT><A NAME="M21"><I>pathName </I><B>flash</B></A><DD>
|
|
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 <B>disabled</B>.
|
|
<P><DT><A NAME="M22"><I>pathName </I><B>invoke</B></A><DD>
|
|
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 <B>disabled</B>.
|
|
<P><DT><A NAME="M23"><I>pathName </I><B>select</B></A><DD>
|
|
Selects the checkbutton and sets the associated variable to its ``on''
|
|
value.
|
|
<P><DT><A NAME="M24"><I>pathName </I><B>toggle</B></A><DD>
|
|
Toggles the selection state of the button, redisplaying it and
|
|
modifying its associated variable to reflect the new state.
|
|
|
|
<P></DL>
|
|
<H3><A NAME="M25">BINDINGS</A></H3>
|
|
Tk automatically creates class bindings for checkbuttons that give them
|
|
the following default behavior:
|
|
<P>
|
|
<DL>
|
|
<P><DT>[1]<DD>
|
|
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.
|
|
<P><DT>[2]<DD>
|
|
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).
|
|
<P><DT>[3]<DD>
|
|
When a checkbutton has the input focus, the space key causes the checkbutton
|
|
to be invoked. Under Windows, there are additional key bindings; plus
|
|
(+) and equal (=) select the button, and minus (-) deselects the button.
|
|
<P></DL>
|
|
<P>
|
|
If the checkbutton's state is <B>disabled</B> then none of the above
|
|
actions occur: the checkbutton is completely non-responsive.
|
|
<P>
|
|
The behavior of checkbuttons can be changed by defining new bindings for
|
|
individual widgets or by redefining the class bindings.
|
|
|
|
<H3><A NAME="M26">KEYWORDS</A></H3>
|
|
<A href="../Keywords/C.htm#checkbutton">checkbutton</A>, <A href="../Keywords/W.htm#widget">widget</A>
|
|
<HR><PRE>
|
|
<A HREF="../copyright.htm">Copyright</A> © 1990-1994 The Regents of the University of California.
|
|
<A HREF="../copyright.htm">Copyright</A> © 1994-1996 Sun Microsystems, Inc.
|
|
<A HREF="../copyright.htm">Copyright</A> © 1995-1997 Roger E. Critchlow Jr.</PRE>
|
|
</BODY></HTML>
|