.TH BUTTON 9.SH NAMEbutton \- 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\fPSpecifies a Tk command to associate with the button.  This commandis typically invoked when mouse button 1 is released over the buttonwindow..TP.B -height \fIdist\fPSpecifies a desired height for the button.If this option isn't specified, the button's desired height is computedfrom the size of the image or bitmap or text being displayed in it..TP.B -state \fIstate\fPSpecifies 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 istypically used when the pointer is over the button.  In active statethe button is displayed using the \f5activeForeground\fR and\f5activeBackground\fR options.  Disabled state means that the buttonshould be insensitive:  the default bindings will refuse to activatethe widget and will ignore mouse button presses.In this state the \f5background\fR option determines how the button isdisplayed..TP.B -width \fIdist\fPSpecifies a desired width for the button.If this option isn't specified, the button's desired width is computedfrom the size of the image or bitmap or text being displayed in it..SH DESCRIPTIONThe \f5button\fR command creates a new window (given by the\fIpathName\fR argument) and makes it into a button widget.Additionaloptions, 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..PPA 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 itcan occupy multiple lines on the screen (if it contains newlines) andone of the characters may optionally be underlined using the\f5underline\fR option.It can display itself in either of three different ways, accordingtothe \f5state\fR option; it can be made to appear raised, sunken, or flat.  When a user invokes thebutton (by pressing mouse button 1 with the cursor over thebutton), then the Tk command specified in the \f5-command\fRoption is invoked..SH "WIDGET COMMAND"The \f5button\fR command creates a new Tk command whosename is \fIpathName\fR.  Thiscommand may be used to invoke variousoperations on the widget.  It has the following general form:.RS.EX\fIpathName option \fR?\fIarg arg ...\fR?.EE.RE\fIOption\fR and the \fIarg\fRsdetermine the exact behaviour of the command.  The followingcommands are possible for button widgets:.TP\fIpathName \f5cget\fR \fIoption\fRReturns the current value of the configuration option givenby \fIoption\fR.\fIOption\fR may have any of the values accepted by the \f5button\fRcommand..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 ofthe available options for \fIpathName\fR. Ifone or more \fIoption-value\fR pairs are specified, then the commandmodifies the given widget option(s) to have the given value(s);  inthis case the command returns an empty string.\fIOption\fR may have any of the values accepted by the \f5button\fRcommand..TP\fIpathName \f5invoke\fRInvoke the Tk command associated with the button, if there is one.The return value is the return value from the Tk command, or anempty 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 themthe following default behaviour:.IP [1]A button activates whenever the mouse passes over it and deactivateswhenever the mouse leaves the button..IP [2]A button's relief is changed to sunken whenever mouse button 1 ispressed over the button, and the relief is restored to its originalvalue when button 1 is later released..IP [3]If mouse button 1 is pressed over a button and later released overthe button, the button is invoked.  However, if the mouse is notover the button when button 1 is released, then no invocation occurs..IP [4]If the.B Enteror.B Spacekey is pressed when the button has keyboard focus,the button is invoked..PPIf the button's state is \f5disabled\fR then none of the aboveactions occur:  the button is completely non-responsive..PPThe behaviour of buttons can be changed by defining new bindings forindividual widgets..SH SEE ALSO.IR checkbutton (9),.IR choicebutton (9),.IR options (9),.IR radiobutton (9),.IR types (9)