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Diffstat (limited to 'library/demos/textpeer.tcl')
-rw-r--r-- | library/demos/textpeer.tcl | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/library/demos/textpeer.tcl b/library/demos/textpeer.tcl new file mode 100644 index 0000000..e94284e --- /dev/null +++ b/library/demos/textpeer.tcl @@ -0,0 +1,62 @@ +# textpeer.tcl -- +# +# This demonstration script creates a pair of text widgets that can edit a +# single logical buffer. This is particularly useful when editing related text +# in two (or more) parts of the same file. + +if {![info exists widgetDemo]} { + error "This script should be run from the \"widget\" demo." +} + +package require Tk + +set w .textpeer +catch {destroy $w} +toplevel $w +wm title $w "Text Widget Peering Demonstration" +wm iconname $w "textpeer" +positionWindow $w + +set count 0 + +## Define a widget that we peer from; it won't ever actually be shown though +set first [text $w.text[incr count]] +$first insert end "This is a coupled pair of text widgets; they are peers to " +$first insert end "each other. They have the same underlying data model, but " +$first insert end "can show different locations, have different current edit " +$first insert end "locations, and have different selections. You can also " +$first insert end "create additional peers of any of these text widgets using " +$first insert end "the Make Peer button beside the text widget to clone, and " +$first insert end "delete a particular peer widget using the Delete Peer " +$first insert end "button." + +## Procedures to make and kill clones; most of this is just so that the demo +## looks nice... +proc makeClone {w parent} { + global count + set t [$parent peer create $w.text[incr count] -yscroll "$w.sb$count set"\ + -height 10 -wrap word] + set sb [scrollbar $w.sb$count -command "$t yview" -orient vertical] + set b1 [button $w.clone$count -command "makeClone $w $t" \ + -text "Make Peer"] + set b2 [button $w.kill$count -command "killClone $w $count" \ + -text "Delete Peer"] + set row [expr {$count * 2}] + grid $t $sb $b1 -sticky nsew -row $row + grid ^ ^ $b2 -row [incr row] + grid configure $b1 $b2 -sticky new + grid rowconfigure $w $b2 -weight 1 +} +proc killClone {w count} { + destroy $w.text$count $w.sb$count + destroy $w.clone$count $w.kill$count +} + +## Now set up the GUI +makeClone $w $first +makeClone $w $first +destroy $first + +## See Code / Dismiss buttons +grid [addSeeDismiss $w.buttons $w] - - -sticky ew -row 5000 +grid columnconfigure $w 0 -weight 1 |