Selection
- 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
Selection support is implemented via tags. If the exportSelection option for the text widget is true then the sel tag will be associated with the selection:
- Whenever characters are tagged with sel the text widget will claim ownership of the selection.
- Attempts to retrieve the selection will be serviced by the text widget, returning all the characters with the sel tag.
- If the selection is claimed away by another application or by another window within this application, then the sel tag will be removed from all characters in the text.
- Whenever the sel tag range changes a virtual event <<Selection>> is generated.
The sel tag is automatically defined when a text widget is created, and it may not be deleted with the (#<widget> 'tag 'delete ...) widget command. Furthermore, the selectbackground, selectborderwidth, and selectforeground options for the text widget are tied to the -background, -borderwidth, and -foreground options for the sel tag: changes in either will automatically be reflected in the other.