/usr/share/doc/tk8.6-doc/demos/cscroll.tcl is in tk8.6-doc 8.6.8-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | # cscroll.tcl --
#
# This demonstration script creates a simple canvas that can be
# scrolled in two dimensions.
if {![info exists widgetDemo]} {
error "This script should be run from the \"widget\" demo."
}
package require Tk
set w .cscroll
catch {destroy $w}
toplevel $w
wm title $w "Scrollable Canvas Demonstration"
wm iconname $w "cscroll"
positionWindow $w
set c $w.c
label $w.msg -font $font -wraplength 4i -justify left -text "This window displays a canvas widget that can be scrolled either using the scrollbars or by dragging with button 2 in the canvas. If you click button 1 on one of the rectangles, its indices will be printed on stdout."
pack $w.msg -side top
## See Code / Dismiss buttons
set btns [addSeeDismiss $w.buttons $w]
pack $btns -side bottom -fill x
frame $w.grid
scrollbar $w.hscroll -orient horiz -command "$c xview"
scrollbar $w.vscroll -command "$c yview"
canvas $c -relief sunken -borderwidth 2 -scrollregion {-11c -11c 50c 20c} \
-xscrollcommand "$w.hscroll set" \
-yscrollcommand "$w.vscroll set"
pack $w.grid -expand yes -fill both -padx 1 -pady 1
grid rowconfig $w.grid 0 -weight 1 -minsize 0
grid columnconfig $w.grid 0 -weight 1 -minsize 0
grid $c -padx 1 -in $w.grid -pady 1 \
-row 0 -column 0 -rowspan 1 -columnspan 1 -sticky news
grid $w.vscroll -in $w.grid -padx 1 -pady 1 \
-row 0 -column 1 -rowspan 1 -columnspan 1 -sticky news
grid $w.hscroll -in $w.grid -padx 1 -pady 1 \
-row 1 -column 0 -rowspan 1 -columnspan 1 -sticky news
set bg [lindex [$c config -bg] 4]
for {set i 0} {$i < 20} {incr i} {
set x [expr {-10 + 3*$i}]
for {set j 0; set y -10} {$j < 10} {incr j; incr y 3} {
$c create rect ${x}c ${y}c [expr {$x+2}]c [expr {$y+2}]c \
-outline black -fill $bg -tags rect
$c create text [expr {$x+1}]c [expr {$y+1}]c -text "$i,$j" \
-anchor center -tags text
}
}
$c bind all <Any-Enter> "scrollEnter $c"
$c bind all <Any-Leave> "scrollLeave $c"
$c bind all <1> "scrollButton $c"
bind $c <2> "$c scan mark %x %y"
bind $c <B2-Motion> "$c scan dragto %x %y"
if {[tk windowingsystem] eq "aqua"} {
bind $c <MouseWheel> {
%W yview scroll [expr {- (%D)}] units
}
bind $c <Option-MouseWheel> {
%W yview scroll [expr {-10 * (%D)}] units
}
bind $c <Shift-MouseWheel> {
%W xview scroll [expr {- (%D)}] units
}
bind $c <Shift-Option-MouseWheel> {
%W xview scroll [expr {-10 * (%D)}] units
}
}
proc scrollEnter canvas {
global oldFill
set id [$canvas find withtag current]
if {[lsearch [$canvas gettags current] text] >= 0} {
set id [expr {$id-1}]
}
set oldFill [lindex [$canvas itemconfig $id -fill] 4]
if {[winfo depth $canvas] > 1} {
$canvas itemconfigure $id -fill SeaGreen1
} else {
$canvas itemconfigure $id -fill black
$canvas itemconfigure [expr {$id+1}] -fill white
}
}
proc scrollLeave canvas {
global oldFill
set id [$canvas find withtag current]
if {[lsearch [$canvas gettags current] text] >= 0} {
set id [expr {$id-1}]
}
$canvas itemconfigure $id -fill $oldFill
$canvas itemconfigure [expr {$id+1}] -fill black
}
proc scrollButton canvas {
global oldFill
set id [$canvas find withtag current]
if {[lsearch [$canvas gettags current] text] < 0} {
set id [expr {$id+1}]
}
puts stdout "You buttoned at [lindex [$canvas itemconf $id -text] 4]"
}
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