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47 lines
1.4 KiB
47 lines
1.4 KiB
6 years ago
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# vscale.tcl --
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#
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# This demonstration script shows an example with a vertical 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 .vscale
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catch {destroy $w}
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toplevel $w
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wm title $w "Vertical Scale Demonstration"
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wm iconname $w "vscale"
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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 vertical scale are displayed below. If you click or drag mouse button 1 in the scale, you can change the size 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
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scale $w.frame.scale -orient vertical -length 284 -from 0 -to 250 \
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-command "setHeight $w.frame.canvas" -tickinterval 50
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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 SeaGreen3 -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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frame $w.frame.right -borderwidth 15
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pack $w.frame.scale -side left -anchor ne
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pack $w.frame.canvas -side left -anchor nw -fill y
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$w.frame.scale set 75
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proc setHeight {w height} {
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incr height 21
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set y2 [expr {$height - 30}]
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if {$y2 < 21} {
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set y2 21
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}
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$w coords poly 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20
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$w coords line 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20
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}
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