label manual page - Tk Built-In Commands

Command-Line Name: -height
Database Name: height
Database Class: 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 Tk_GetPixels); for text it is in lines of text. If this option is not specified, the label's desired height is computed from the size of the image or bitmap or text being displayed in it.
Command-Line Name: -state
Database Name: state
Database Class: State: Specifies one of three states for the label: normal, active, or disabled. In normal state the button is displayed using the -foreground and -background options. In active state the label is displayed using the -activeforeground and -activebackground options. In the disabled state the -disabledforeground and -background options determine how the button is displayed.
Command-Line Name: -width
Database Name: width
Database Class: 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 Tk_GetPixels); for text it is in characters. If this option is not specified, the label's desired width is computed from the size of the image or bitmap or text being displayed in it.

The label command creates a new window (given by the pathName 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 label command returns its pathName argument. At the time this command is invoked, there must not exist a window named pathName, but pathName'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 -wraplength option) and one of the characters may optionally be underlined using the -underline option. The label can be manipulated in a few simple ways, such as changing its relief or text, using the commands described below.

WIDGET COMMAND

The label command creates a new Tcl command whose name is pathName. This command may be used to invoke various operations on the widget. It has the following general form:

pathName option ?arg arg ...?

Option and the args determine the exact behavior of the command. The following commands are possible for label widgets:

pathName cget option: Returns the current value of the configuration option given by option. Option may have any of the values accepted by the label command.
pathName configure ?option? ?value option value ...?: Query or modify the configuration options of the widget. If no option is specified, returns a list describing all of the available options for pathName (see Tk_ConfigureInfo for information on the format of this list). If option is specified with no value, 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 option is specified). If one or more option-value 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. Option may have any of the values accepted by the label command.

BINDINGS

When a new label is created, it has no default event bindings: labels are not intended to be interactive.

EXAMPLE

# Make the widgets
label .t -text "This widget is at the top"    -bg red
label .b -text "This widget is at the bottom" -bg green
label .l -text "Left\nHand\nSide"
label .r -text "Right\nHand\nSide"
text .mid
        .mid insert end "This layout is like Java's BorderLayout"
# Lay them out
pack .t   -side top    -fill x
pack .b   -side bottom -fill x
pack .l   -side left   -fill y
pack .r   -side right  -fill y
pack .mid -expand 1    -fill both

KEYWORDS

label, widget