| # vscale.tcl -- |
| # |
| # This demonstration script shows an example with a vertical scale. |
| # |
| # RCS: @(#) $Id: vscale.tcl,v 1.3 2001/06/14 10:56:58 dkf Exp $ |
| |
| if {![info exists widgetDemo]} { |
| error "This script should be run from the \"widget\" demo." |
| } |
| |
| set w .vscale |
| catch {destroy $w} |
| toplevel $w |
| wm title $w "Vertical Scale Demonstration" |
| wm iconname $w "vscale" |
| positionWindow $w |
| |
| 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." |
| pack $w.msg -side top -padx .5c |
| |
| frame $w.buttons |
| pack $w.buttons -side bottom -fill x -pady 2m |
| button $w.buttons.dismiss -text Dismiss -command "destroy $w" |
| button $w.buttons.code -text "See Code" -command "showCode $w" |
| pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 |
| |
| frame $w.frame -borderwidth 10 |
| pack $w.frame |
| |
| scale $w.frame.scale -orient vertical -length 284 -from 0 -to 250 \ |
| -command "setHeight $w.frame.canvas" -tickinterval 50 |
| canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0 |
| $w.frame.canvas create polygon 0 0 1 1 2 2 -fill SeaGreen3 -tags poly |
| $w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line |
| frame $w.frame.right -borderwidth 15 |
| pack $w.frame.scale -side left -anchor ne |
| pack $w.frame.canvas -side left -anchor nw -fill y |
| $w.frame.scale set 75 |
| |
| proc setHeight {w height} { |
| incr height 21 |
| set y2 [expr {$height - 30}] |
| if {$y2 < 21} { |
| set y2 21 |
| } |
| $w coords poly 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20 |
| $w coords line 15 20 35 20 35 $y2 45 $y2 25 $height 5 $y2 15 $y2 15 20 |
| } |
