Indices
- Preface
- Introduction
- Tutorial
- Implementation
- Commands
- bitmap
- eval-wish
- get-tk-var
- photo
- set-tk-var!
- tk
- tk-id->widget
- tk-var
- tk/after
- tk/appname
- tk/bind
- tk/bindtags
- tk/caret
- tk/choosecolor
- tk/choosedirectory
- tk/clipboard
- tk/console
- tk/destroy
- tk/dialog
- tk/event
- tk/focus
- tk/getopenfile
- tk/getsavefile
- tk/grab
- tk/grid
- tk/image
- tk/lower
- tk/messagebox
- tk/option
- tk/pack
- tk/place
- tk/popup
- tk/raise
- tk/scaling
- tk/update
- tk/useinputmethods
- tk/wait
- tk/windowingsystem
- tk/winfo
- tk/wm
- Options
- Extensions
- Changes
Many of the widget commands for entries take one or more indices as arguments. An index specifies a particular character in the entry's string, in any of the following ways:
- number
- Specifies the character as a numerical index, where 0 corresponds to the first character in the string.
- anchor
- Indicates the anchor point for the selection, which is set with the select from and select adjust widget commands.
- end
- Indicates the character just after the last one in the entry's string. This is equivalent to specifying a numerical index equal to the length of the entry's string.
- insert
- Indicates the character adjacent to and immediately following the insertion cursor.
- sel.first
- Indicates the first character in the selection. It is an error to use this form if the selection isn't in the entry window.
- sel.last
- Indicates the character just after the last one in the selection. It is an error to use this form if the selection isn't in the entry window.
- @number
- In this form, number is treated as an x-coordinate in the entry's window; the character spanning that x-coordinate is used. For example, ``@0'' indicates the left-most character in the window.
In general, out-of-range indices are automatically rounded to the nearest legal value.