| # hscale.tcl -- |
| # |
| # This demonstration script shows an example with a horizontal scale. |
| # |
| # RCS: @(#) $Id: hscale.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 .hscale |
| catch {destroy $w} |
| toplevel $w |
| wm title $w "Horizontal Scale Demonstration" |
| wm iconname $w "hscale" |
| positionWindow $w |
| |
| 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." |
| 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 -side top -fill x |
| |
| canvas $w.frame.canvas -width 50 -height 50 -bd 0 -highlightthickness 0 |
| $w.frame.canvas create polygon 0 0 1 1 2 2 -fill DeepSkyBlue3 -tags poly |
| $w.frame.canvas create line 0 0 1 1 2 2 0 0 -fill black -tags line |
| scale $w.frame.scale -orient horizontal -length 284 -from 0 -to 250 \ |
| -command "setWidth $w.frame.canvas" -tickinterval 50 |
| pack $w.frame.canvas -side top -expand yes -anchor s -fill x -padx 15 |
| pack $w.frame.scale -side bottom -expand yes -anchor n |
| $w.frame.scale set 75 |
| |
| proc setWidth {w width} { |
| incr width 21 |
| set x2 [expr {$width - 30}] |
| if {$x2 < 21} { |
| set x2 21 |
| } |
| $w coords poly 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15 |
| $w coords line 20 15 20 35 $x2 35 $x2 45 $width 25 $x2 5 $x2 15 20 15 |
| } |
