View file File name : Label.pod Content :# 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. # # =head1 NAME Tk::Label - Create and manipulate Label widgets =for category Tk Widget Classes =head1 SYNOPSIS I<$label> = I<$parent>-E<gt>B<Label>(?I<options>?); =head1 STANDARD OPTIONS B<-activebackground> B<-activeforeground> B<-anchor> B<-background> B<-bitmap> B<-borderwidth> B<-compound> B<-cursor> B<-disabledforeground> B<-font> B<-foreground> B<-highlightbackground> B<-highlightcolor> B<-highlightthickness> B<-image> B<-justify> B<-padx> B<-pady> B<-relief> B<-takefocus> B<-text> B<-textvariable> B<-underline> B<-wraplength> See L<Tk::options> for details of the standard options. =head1 WIDGET-SPECIFIC OPTIONS =over 4 =item Name: B<height> =item Class: B<Height> =item Switch: B<-height> Specifies a desired height for the label. If an image or bitmap is being displayed in the label then the value is in screen units (i.e. any of the forms acceptable to B<Tk_GetPixels>); for text it is in lines of text. If this option isn't specified, the label's desired height is computed from the size of the image or bitmap or text being displayed in it. =item Name: B<state> =item Class: B<State> =item Switch: B<-state> Specifies one of three states for the label: B<normal>, B<active>, or B<disabled>. In normal state the label is displayed using the B<foreground> and B<background> options. In active state the label is displayed using the B<activeForeground> and B<activeBackground> options. In the disabled state the B<disabledForeground> and B<background> options determine how the button is displayed. =item Name: B<width> =item Class: B<Width> =item Switch: B<-width> Specifies a desired width for the label. If an image or bitmap is being displayed in the label then the value is in screen units (i.e. any of the forms acceptable to B<Tk_GetPixels>); for text it is in characters. If this option isn't specified, the label's desired width is computed from the size of the image or bitmap or text being displayed in it. =back =head1 DESCRIPTION The B<Label> method creates a new window (given by the $widget argument) and makes it into a label widget. Additional options, described above, may be specified on the command line or in the option database to configure aspects of the label such as its colors, font, text, and initial relief. The B<label> command returns its $widget argument. At the time this command is invoked, there must not exist a window named $widget, but $widget's parent must exist. A label 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 or if wrapping occurs because of the B<wrapLength> option) and one of the characters may optionally be underlined using the B<underline> option. The label can be manipulated in a few simple ways, such as changing its relief or text, using the commands described below. =head1 WIDGET METHODS The B<Label> method creates a widget object. This object supports the B<configure> and B<cget> methods described in L<Tk::options> which can be used to enquire and modify the options described above. The widget also inherits all the methods provided by the generic L<Tk::Widget|Tk::Widget> class. =head1 BINDINGS When a new label is created, it has no default event bindings: labels are not intended to be interactive. =head1 KEYWORDS label, widget =cut