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+.TH BUTTON 9
+.SH NAME
+button \- Create and manipulate button widgets
+.SH SYNOPSIS
+\f5button\fI \fIpathName \fR?\fIoptions\fR?
+.SH STANDARD OPTIONS
+.EX
+-activebackground -disabledcolor      -justify
+-activeforeground -font               -relief
+-anchor           -foreground         -takefocus
+-background       -highlightcolor     -text
+-bitmap           -highlightthickness -underline
+-borderwidth      -image
+.EE
+.SH "WIDGET-SPECIFIC OPTIONS"
+.TP
+.B -command \fItkcmd\fP
+Specifies a Tk command to associate with the button.  This command
+is typically invoked when mouse button 1 is released over the button
+window.
+.TP
+.B -height \fIdist\fP
+Specifies a desired height for the button.
+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.
+.TP
+.B -state \fIstate\fP
+Specifies one of three states for the button:  \f5normal\fR, \f5active\fR,
+or \f5disabled\fR.  In normal state the button is displayed using the
+\f5foreground\fR and \f5background\fR options.  The active state is
+typically used when the pointer is over the button.  In active state
+the button is displayed using the \f5activeForeground\fR and
+\f5activeBackground\fR options.  Disabled state means that the button
+should be insensitive:  the default bindings will refuse to activate
+the widget and will ignore mouse button presses.
+In this state the \f5background\fR option determines how the button is
+displayed.
+.TP
+.B -width \fIdist\fP
+Specifies a desired width for the button.
+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.
+.SH DESCRIPTION
+The \f5button\fR command creates a new window (given by the
+\fIpathName\fR argument) and makes it into a button widget.
+Additional
+options, described above, may be specified on the command line.
+to configure aspects of the button such as its colours, font,
+text, and initial relief.  The \f5button\fR command returns its
+\fIpathName\fR argument.  At the time this command is invoked,
+there must not exist a window named \fIpathName\fR.
+.PP
+A button is a widget that displays a textual string, bitmap or image.
+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) and
+one of the characters may optionally be underlined using the
+\f5underline\fR option.
+It can display itself in either of three different ways, according
+to
+the \f5state\fR option; 
+it can be made to appear raised, sunken, or flat.  When a user invokes the
+button (by pressing mouse button 1 with the cursor over the
+button), then the Tk command specified in the \f5-command\fR
+option is invoked.
+.SH "WIDGET COMMAND"
+The \f5button\fR command creates a new Tk command whose
+name is \fIpathName\fR.  This
+command may be used to invoke various
+operations on the widget.  It has the following general form:
+.RS
+.EX
+\fIpathName option \fR?\fIarg arg ...\fR?
+.EE
+.RE
+\fIOption\fR and the \fIarg\fRs
+determine the exact behaviour of the command.  The following
+commands are possible for button widgets:
+.TP
+\fIpathName \f5cget\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 \f5button\fR
+command.
+.TP
+\fIpathName \f5configure\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 of all of
+the available options for \fIpathName\fR. 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 \f5button\fR
+command.
+.TP
+\fIpathName \f5invoke\fR
+Invoke the Tk command associated with the button, if there is one.
+The return value is the return value from the Tk command, or an
+empty string if there is no command associated with the button.
+This command is ignored if the button's state is \f5disabled\fR.
+
+.SH "DEFAULT BINDINGS"
+Tk automatically creates bindings for buttons that give them
+the following default behaviour:
+.IP [1]
+A button activates whenever the mouse passes over it and deactivates
+whenever the mouse leaves the button.
+.IP [2]
+A button's relief is changed to sunken whenever mouse button 1 is
+pressed over the button, and the relief is restored to its original
+value when button 1 is later released.
+.IP [3]
+If mouse button 1 is pressed over a button and later released over
+the button, the button is invoked.  However, if the mouse is not
+over the button when button 1 is released, then no invocation occurs.
+.IP [4]
+If the
+.B Enter
+or
+.B Space
+key is pressed when the button has keyboard focus,
+the button is invoked.
+.PP
+If the button's state is \f5disabled\fR then none of the above
+actions occur:  the button is completely non-responsive.
+.PP
+The behaviour of buttons can be changed by defining new bindings for
+individual widgets.
+.SH SEE ALSO
+.IR checkbutton (9),
+.IR choicebutton (9),
+.IR options (9),
+.IR radiobutton (9),
+.IR types (9)