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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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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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