You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
1.5 KiB
Tcl
46 lines
1.5 KiB
Tcl
# hscale.tcl --
|
|
#
|
|
# This demonstration script shows an example with a horizontal scale.
|
|
|
|
if {![info exists widgetDemo]} {
|
|
error "This script should be run from the \"widget\" demo."
|
|
}
|
|
|
|
package require Tk
|
|
|
|
set w .hscale
|
|
catch {destroy $w}
|
|
toplevel $w
|
|
wm title $w "Horizontal Scale Demonstration"
|
|
wm iconname $w "hscale"
|
|
positionWindow $w
|
|
|
|
label $w.msg -font $font -wraplength 3.5i -justify left -text "An arrow and a horizontal scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the length of the arrow."
|
|
pack $w.msg -side top -padx .5c
|
|
|
|
## See Code / Dismiss buttons
|
|
set btns [addSeeDismiss $w.buttons $w]
|
|
pack $btns -side bottom -fill x
|
|
|
|
frame $w.frame -borderwidth 10
|
|
pack $w.frame -side top -fill x
|
|
|
|
canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0
|
|
$w.frame.canvas create polygon 0 0 1 1 2 2 -fill DeepSkyBlue3 -tags poly
|
|
$w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line
|
|
scale $w.frame.scale -orient horizontal -length 284 -from 0 -to 250 \
|
|
-command "setWidth $w.frame.canvas" -tickinterval 50
|
|
pack $w.frame.canvas -side top -expand yes -anchor s -fill x -padx 15
|
|
pack $w.frame.scale -side bottom -expand yes -anchor n
|
|
$w.frame.scale set 75
|
|
|
|
proc setWidth {w width} {
|
|
incr width 21
|
|
set x2 [expr {$width - 30}]
|
|
if {$x2 < 21} {
|
|
set x2 21
|
|
}
|
|
$w coords poly 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15
|
|
$w coords line 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15
|
|
}
|