1 | # hscale.tcl -- |
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2 | # |
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3 | # This demonstration script shows an example with a horizontal scale. |
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4 | # |
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5 | # RCS: @(#) $Id: hscale.tcl,v 1.2 1998/09/14 18:23:28 stanton Exp $ |
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6 | |
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7 | if {![info exists widgetDemo]} { |
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8 | error "This script should be run from the \"widget\" demo." |
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9 | } |
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10 | |
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11 | set w .hscale |
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12 | catch {destroy $w} |
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13 | toplevel $w |
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14 | wm title $w "Horizontal Scale Demonstration" |
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15 | wm iconname $w "hscale" |
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16 | positionWindow $w |
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17 | |
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18 | 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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19 | pack $w.msg -side top -padx .5c |
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20 | |
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21 | frame $w.buttons |
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22 | pack $w.buttons -side bottom -fill x -pady 2m |
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23 | button $w.buttons.dismiss -text Dismiss -command "destroy $w" |
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24 | button $w.buttons.code -text "See Code" -command "showCode $w" |
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25 | pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 |
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26 | |
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27 | frame $w.frame -borderwidth 10 |
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28 | pack $w.frame -side top -fill x |
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29 | |
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30 | canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0 |
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31 | $w.frame.canvas create polygon 0 0 1 1 2 2 -fill DeepSkyBlue3 -tags poly |
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32 | $w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line |
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33 | scale $w.frame.scale -orient horizontal -length 284 -from 0 -to 250 \ |
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34 | -command "setWidth $w.frame.canvas" -tickinterval 50 |
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35 | pack $w.frame.canvas -side top -expand yes -anchor s -fill x -padx 15 |
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36 | pack $w.frame.scale -side bottom -expand yes -anchor n |
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37 | $w.frame.scale set 75 |
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38 | |
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39 | proc setWidth {w width} { |
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40 | incr width 21 |
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41 | set x2 [expr $width - 30] |
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42 | if {$x2 < 21} { |
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43 | set x2 21 |
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44 | } |
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45 | $w coords poly 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15 |
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46 | $w coords line 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15 |
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47 | } |
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