46 lines
1.5 KiB
Tcl
46 lines
1.5 KiB
Tcl
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# hscale.tcl --
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#
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# This demonstration script shows an example with a horizontal scale.
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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 .hscale
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catch {destroy $w}
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toplevel $w
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wm title $w "Horizontal Scale Demonstration"
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wm iconname $w "hscale"
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positionWindow $w
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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."
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pack $w.msg -side top -padx .5c
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## See Code / Dismiss buttons
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set btns [addSeeDismiss $w.buttons $w]
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pack $btns -side bottom -fill x
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frame $w.frame -borderwidth 10
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pack $w.frame -side top -fill x
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canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0
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$w.frame.canvas create polygon 0 0 1 1 2 2 -fill DeepSkyBlue3 -tags poly
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$w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line
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scale $w.frame.scale -orient horizontal -length 284 -from 0 -to 250 \
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-command "setWidth $w.frame.canvas" -tickinterval 50
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pack $w.frame.canvas -side top -expand yes -anchor s -fill x -padx 15
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pack $w.frame.scale -side bottom -expand yes -anchor n
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$w.frame.scale set 75
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proc setWidth {w width} {
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incr width 21
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set x2 [expr {$width - 30}]
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if {$x2 < 21} {
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set x2 21
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}
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$w coords poly 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15
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$w coords line 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15
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}
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