1 | # vscale.tcl -- |
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2 | # |
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3 | # This demonstration script shows an example with a vertical scale. |
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4 | # |
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5 | # RCS: @(#) $Id: vscale.tcl,v 1.3 2001/06/14 10:56:58 dkf 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 .vscale |
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12 | catch {destroy $w} |
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13 | toplevel $w |
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14 | wm title $w "Vertical Scale Demonstration" |
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15 | wm iconname $w "vscale" |
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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 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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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 |
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29 | |
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30 | scale $w.frame.scale -orient vertical -length 284 -from 0 -to 250 \ |
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31 | -command "setHeight $w.frame.canvas" -tickinterval 50 |
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32 | canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0 |
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33 | $w.frame.canvas create polygon 0 0 1 1 2 2 -fill SeaGreen3 -tags poly |
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34 | $w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line |
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35 | frame $w.frame.right -borderwidth 15 |
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36 | pack $w.frame.scale -side left -anchor ne |
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37 | pack $w.frame.canvas -side left -anchor nw -fill y |
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38 | $w.frame.scale set 75 |
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39 | |
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40 | proc setHeight {w height} { |
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41 | incr height 21 |
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42 | set y2 [expr {$height - 30}] |
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43 | if {$y2 < 21} { |
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44 | set y2 21 |
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45 | } |
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46 | $w coords poly 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20 |
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47 | $w coords line 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20 |
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48 | } |
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