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