# This file:
#   http://anggtwu.net/TCL/scrollingcanvas.tcl.html
#   http://anggtwu.net/TCL/scrollingcanvas.tcl
#          (find-angg "TCL/scrollingcanvas.tcl")
# Author: Eduardo Ochs <eduardoochs@gmail.com>
#
# (defun e () (interactive) (find-angg "TCL/scrollingcanvas.tcl"))
# https://wiki.tcl-lang.org/page/Minimal+scrolling+canvas


set height 400
set width  600
set borderwidth 2

set hscroll .hscroll
set vscroll .vscroll
set canvas .c

scrollbar $hscroll -orient horiz -command "$canvas xview"
scrollbar $vscroll               -command "$canvas yview"
canvas $canvas -relief sunken -borderwidth $borderwidth \
                          -width $width -height $height \
                          -xscrollcommand "$hscroll set" \
                          -yscrollcommand "$vscroll set"
# Ensure that window resizings retain scroll bars.
pack $hscroll -side bottom -fill x
pack $vscroll -side right  -fill y
pack $canvas  -side right  -fill both  -expand 1
# Somebody want to express the above in "grid"?
# That'd be good practice.

# Put something visible on the canvas 
# so we have a sense of what we're seeing.
$canvas create line 0 0       $width $height
$canvas create line 0 $height $width 0
$canvas configure -scrollregion [$canvas bbox all]


lindex {{} {This is a test block:
* (eepitch-shell)
* (eepitch-kill)
* (eepitch-shell)
wish scrollingcanvas.tcl

* (eepitch-tclsh)
* (eepitch-kill)
* (eepitch-tclsh)
  source scrollingcanvas.tcl

}} 0 ;# End of the test block




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